summaryrefslogtreecommitdiff
path: root/arch/arm26/kernel
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 22:20:36 (GMT)
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 22:20:36 (GMT)
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm26/kernel
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm26/kernel')
-rw-r--r--arch/arm26/kernel/Makefile17
-rw-r--r--arch/arm26/kernel/armksyms.c220
-rw-r--r--arch/arm26/kernel/asm-offsets.c63
-rw-r--r--arch/arm26/kernel/calls.S265
-rw-r--r--arch/arm26/kernel/compat.c174
-rw-r--r--arch/arm26/kernel/dma.c273
-rw-r--r--arch/arm26/kernel/ecard.c850
-rw-r--r--arch/arm26/kernel/entry.S961
-rw-r--r--arch/arm26/kernel/fiq.c202
-rw-r--r--arch/arm26/kernel/head.S113
-rw-r--r--arch/arm26/kernel/init_task.c49
-rw-r--r--arch/arm26/kernel/irq.c716
-rw-r--r--arch/arm26/kernel/process.c401
-rw-r--r--arch/arm26/kernel/ptrace.c744
-rw-r--r--arch/arm26/kernel/ptrace.h13
-rw-r--r--arch/arm26/kernel/semaphore.c223
-rw-r--r--arch/arm26/kernel/setup.c573
-rw-r--r--arch/arm26/kernel/signal.c540
-rw-r--r--arch/arm26/kernel/sys_arm.c324
-rw-r--r--arch/arm26/kernel/time.c234
-rw-r--r--arch/arm26/kernel/traps.c548
-rw-r--r--arch/arm26/kernel/vmlinux-arm26-xip.lds.in134
-rw-r--r--arch/arm26/kernel/vmlinux-arm26.lds.in127
-rw-r--r--arch/arm26/kernel/vmlinux.lds.S12
24 files changed, 7776 insertions, 0 deletions
diff --git a/arch/arm26/kernel/Makefile b/arch/arm26/kernel/Makefile
new file mode 100644
index 0000000..ee9fb49
--- /dev/null
+++ b/arch/arm26/kernel/Makefile
@@ -0,0 +1,17 @@
+#
+# Makefile for the linux kernel.
+#
+
+# Object file lists.
+
+AFLAGS_head.o := -DTEXTADDR=$(TEXTADDR)
+
+obj-y := compat.o dma.o entry.o irq.o process.o ptrace.o \
+ semaphore.o setup.o signal.o sys_arm.o time.o traps.o \
+ ecard.o dma.o ecard.o fiq.o time.o
+
+extra-y := head.o init_task.o vmlinux.lds
+
+obj-$(CONFIG_FIQ) += fiq.o
+obj-$(CONFIG_MODULES) += armksyms.o
+
diff --git a/arch/arm26/kernel/armksyms.c b/arch/arm26/kernel/armksyms.c
new file mode 100644
index 0000000..35514b3
--- /dev/null
+++ b/arch/arm26/kernel/armksyms.c
@@ -0,0 +1,220 @@
+/*
+ * linux/arch/arm26/kernel/armksyms.c
+ *
+ * Copyright (C) 2003 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/user.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/delay.h>
+#include <linux/in6.h>
+#include <linux/interrupt.h>
+#include <linux/pm.h>
+#include <linux/tty.h>
+#include <linux/vt_kern.h>
+#include <linux/smp_lock.h>
+#include <linux/syscalls.h>
+
+#include <asm/byteorder.h>
+#include <asm/elf.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/processor.h>
+#include <asm/semaphore.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/checksum.h>
+#include <asm/mach-types.h>
+
+extern void dump_thread(struct pt_regs *, struct user *);
+extern int dump_fpu(struct pt_regs *, struct user_fp_struct *);
+extern void inswb(unsigned int port, void *to, int len);
+extern void outswb(unsigned int port, const void *to, int len);
+
+extern void __bad_xchg(volatile void *ptr, int size);
+
+/*
+ * libgcc functions - functions that are used internally by the
+ * compiler... (prototypes are not correct though, but that
+ * doesn't really matter since they're not versioned).
+ */
+extern void __ashldi3(void);
+extern void __ashrdi3(void);
+extern void __divsi3(void);
+extern void __lshrdi3(void);
+extern void __modsi3(void);
+extern void __muldi3(void);
+extern void __ucmpdi2(void);
+extern void __udivdi3(void);
+extern void __umoddi3(void);
+extern void __udivmoddi4(void);
+extern void __udivsi3(void);
+extern void __umodsi3(void);
+extern void abort(void);
+
+extern void ret_from_exception(void);
+extern void fpundefinstr(void);
+extern void fp_enter(void);
+
+/*
+ * This has a special calling convention; it doesn't
+ * modify any of the usual registers, except for LR.
+ * FIXME - we used to use our own local version - looks to be in kernel/softirq now
+ */
+//extern void __do_softirq(void);
+
+#define EXPORT_SYMBOL_ALIAS(sym,orig) \
+ const char __kstrtab_##sym[] \
+ __attribute__((section(".kstrtab"))) = \
+ __MODULE_STRING(sym); \
+ const struct module_symbol __ksymtab_##sym \
+ __attribute__((section("__ksymtab"))) = \
+ { (unsigned long)&orig, __kstrtab_##sym };
+
+/*
+ * floating point math emulator support.
+ * These symbols will never change their calling convention...
+ */
+EXPORT_SYMBOL_ALIAS(kern_fp_enter,fp_enter);
+EXPORT_SYMBOL_ALIAS(fp_printk,printk);
+EXPORT_SYMBOL_ALIAS(fp_send_sig,send_sig);
+
+EXPORT_SYMBOL(fpundefinstr);
+EXPORT_SYMBOL(ret_from_exception);
+
+#ifdef CONFIG_VT
+EXPORT_SYMBOL(kd_mksound);
+#endif
+
+//EXPORT_SYMBOL(__do_softirq);
+
+ /* platform dependent support */
+EXPORT_SYMBOL(dump_thread);
+EXPORT_SYMBOL(dump_fpu);
+EXPORT_SYMBOL(udelay);
+EXPORT_SYMBOL(kernel_thread);
+EXPORT_SYMBOL(system_rev);
+EXPORT_SYMBOL(system_serial_low);
+EXPORT_SYMBOL(system_serial_high);
+#ifdef CONFIG_DEBUG_BUGVERBOSE
+EXPORT_SYMBOL(__bug);
+#endif
+EXPORT_SYMBOL(__bad_xchg);
+EXPORT_SYMBOL(__readwrite_bug);
+EXPORT_SYMBOL(enable_irq);
+EXPORT_SYMBOL(disable_irq);
+EXPORT_SYMBOL(set_irq_type);
+EXPORT_SYMBOL(pm_idle);
+EXPORT_SYMBOL(pm_power_off);
+
+ /* processor dependencies */
+EXPORT_SYMBOL(__machine_arch_type);
+
+ /* networking */
+EXPORT_SYMBOL(csum_partial_copy_nocheck);
+EXPORT_SYMBOL(__csum_ipv6_magic);
+
+ /* io */
+#ifndef __raw_readsb
+EXPORT_SYMBOL(__raw_readsb);
+#endif
+#ifndef __raw_readsw
+EXPORT_SYMBOL(__raw_readsw);
+#endif
+#ifndef __raw_readsl
+EXPORT_SYMBOL(__raw_readsl);
+#endif
+#ifndef __raw_writesb
+EXPORT_SYMBOL(__raw_writesb);
+#endif
+#ifndef __raw_writesw
+EXPORT_SYMBOL(__raw_writesw);
+#endif
+#ifndef __raw_writesl
+EXPORT_SYMBOL(__raw_writesl);
+#endif
+
+ /* string / mem functions */
+EXPORT_SYMBOL(strcpy);
+EXPORT_SYMBOL(strncpy);
+EXPORT_SYMBOL(strcat);
+EXPORT_SYMBOL(strncat);
+EXPORT_SYMBOL(strcmp);
+EXPORT_SYMBOL(strncmp);
+EXPORT_SYMBOL(strchr);
+EXPORT_SYMBOL(strlen);
+EXPORT_SYMBOL(strnlen);
+EXPORT_SYMBOL(strpbrk);
+EXPORT_SYMBOL(strrchr);
+EXPORT_SYMBOL(strstr);
+EXPORT_SYMBOL(memset);
+EXPORT_SYMBOL(memcpy);
+EXPORT_SYMBOL(memmove);
+EXPORT_SYMBOL(memcmp);
+EXPORT_SYMBOL(memscan);
+EXPORT_SYMBOL(__memzero);
+
+ /* user mem (segment) */
+EXPORT_SYMBOL(uaccess_kernel);
+EXPORT_SYMBOL(uaccess_user);
+
+EXPORT_SYMBOL(__get_user_1);
+EXPORT_SYMBOL(__get_user_2);
+EXPORT_SYMBOL(__get_user_4);
+EXPORT_SYMBOL(__get_user_8);
+
+EXPORT_SYMBOL(__put_user_1);
+EXPORT_SYMBOL(__put_user_2);
+EXPORT_SYMBOL(__put_user_4);
+EXPORT_SYMBOL(__put_user_8);
+
+ /* gcc lib functions */
+EXPORT_SYMBOL(__ashldi3);
+EXPORT_SYMBOL(__ashrdi3);
+EXPORT_SYMBOL(__divsi3);
+EXPORT_SYMBOL(__lshrdi3);
+EXPORT_SYMBOL(__modsi3);
+EXPORT_SYMBOL(__muldi3);
+EXPORT_SYMBOL(__ucmpdi2);
+EXPORT_SYMBOL(__udivdi3);
+EXPORT_SYMBOL(__umoddi3);
+EXPORT_SYMBOL(__udivmoddi4);
+EXPORT_SYMBOL(__udivsi3);
+EXPORT_SYMBOL(__umodsi3);
+
+ /* bitops */
+EXPORT_SYMBOL(_set_bit_le);
+EXPORT_SYMBOL(_test_and_set_bit_le);
+EXPORT_SYMBOL(_clear_bit_le);
+EXPORT_SYMBOL(_test_and_clear_bit_le);
+EXPORT_SYMBOL(_change_bit_le);
+EXPORT_SYMBOL(_test_and_change_bit_le);
+EXPORT_SYMBOL(_find_first_zero_bit_le);
+EXPORT_SYMBOL(_find_next_zero_bit_le);
+
+ /* elf */
+EXPORT_SYMBOL(elf_platform);
+EXPORT_SYMBOL(elf_hwcap);
+
+ /* syscalls */
+EXPORT_SYMBOL(sys_write);
+EXPORT_SYMBOL(sys_read);
+EXPORT_SYMBOL(sys_lseek);
+EXPORT_SYMBOL(sys_open);
+EXPORT_SYMBOL(sys_exit);
+EXPORT_SYMBOL(sys_wait4);
+
+EXPORT_SYMBOL(get_wchan);
+
+#ifdef CONFIG_PREEMPT
+EXPORT_SYMBOL(kernel_flag);
+#endif
diff --git a/arch/arm26/kernel/asm-offsets.c b/arch/arm26/kernel/asm-offsets.c
new file mode 100644
index 0000000..4ccacae
--- /dev/null
+++ b/arch/arm26/kernel/asm-offsets.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 1995-2001 Russell King
+ * 2001-2002 Keith Owens
+ * 2003 Ian Molton
+ *
+ * Generate definitions needed by assembly language modules.
+ * This code generates raw asm output which is post-processed to extract
+ * and format the required data.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+
+#include <asm/pgtable.h>
+#include <asm/uaccess.h>
+
+/*
+ * Make sure that the compiler and target are compatible.
+ */
+#if defined(__APCS_32__) && defined(CONFIG_CPU_26)
+#error Sorry, your compiler targets APCS-32 but this kernel requires APCS-26
+#endif
+#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 95)
+#error Sorry, your compiler is known to miscompile kernels. Only use gcc 2.95.3 and later.
+#endif
+#if __GNUC__ == 2 && __GNUC_MINOR__ == 95
+/* shame we can't detect the .1 or .2 releases */
+#warning GCC 2.95.2 and earlier miscompiles kernels.
+#endif
+
+/* Use marker if you need to separate the values later */
+
+#define DEFINE(sym, val) \
+ asm volatile("\n->" #sym " %0 " #val : : "i" (val))
+
+#define BLANK() asm volatile("\n->" : : )
+
+int main(void)
+{
+ DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
+ BLANK();
+ DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm));
+ DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags));
+ BLANK();
+ DEFINE(VM_EXEC, VM_EXEC);
+ BLANK();
+ BLANK();
+ DEFINE(PAGE_PRESENT, _PAGE_PRESENT);
+ DEFINE(PAGE_READONLY, _PAGE_READONLY);
+ DEFINE(PAGE_NOT_USER, _PAGE_NOT_USER);
+ DEFINE(PAGE_OLD, _PAGE_OLD);
+ DEFINE(PAGE_CLEAN, _PAGE_CLEAN);
+ BLANK();
+ DEFINE(PAGE_SZ, PAGE_SIZE);
+ BLANK();
+ DEFINE(SYS_ERROR0, 0x9f0000);
+ return 0;
+}
diff --git a/arch/arm26/kernel/calls.S b/arch/arm26/kernel/calls.S
new file mode 100644
index 0000000..e3d2768
--- /dev/null
+++ b/arch/arm26/kernel/calls.S
@@ -0,0 +1,265 @@
+/*
+ * linux/arch/arm26/kernel/calls.S
+ *
+ * Copyright (C) 2003 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * FIXME
+ * This file is included twice in entry.S which may not be necessary
+ */
+
+//FIXME - clearly NR_syscalls is never defined here
+
+#ifndef NR_syscalls
+#define NR_syscalls 256
+#else
+
+__syscall_start:
+/* 0 */ .long sys_ni_syscall
+ .long sys_exit
+ .long sys_fork_wrapper
+ .long sys_read
+ .long sys_write
+/* 5 */ .long sys_open
+ .long sys_close
+ .long sys_ni_syscall /* was sys_waitpid */
+ .long sys_creat
+ .long sys_link
+/* 10 */ .long sys_unlink
+ .long sys_execve_wrapper
+ .long sys_chdir
+ .long sys_time /* used by libc4 */
+ .long sys_mknod
+/* 15 */ .long sys_chmod
+ .long sys_lchown16
+ .long sys_ni_syscall /* was sys_break */
+ .long sys_ni_syscall /* was sys_stat */
+ .long sys_lseek
+/* 20 */ .long sys_getpid
+ .long sys_mount
+ .long sys_oldumount /* used by libc4 */
+ .long sys_setuid16
+ .long sys_getuid16
+/* 25 */ .long sys_stime
+ .long sys_ptrace
+ .long sys_alarm /* used by libc4 */
+ .long sys_ni_syscall /* was sys_fstat */
+ .long sys_pause
+/* 30 */ .long sys_utime /* used by libc4 */
+ .long sys_ni_syscall /* was sys_stty */
+ .long sys_ni_syscall /* was sys_getty */
+ .long sys_access
+ .long sys_nice
+/* 35 */ .long sys_ni_syscall /* was sys_ftime */
+ .long sys_sync
+ .long sys_kill
+ .long sys_rename
+ .long sys_mkdir
+/* 40 */ .long sys_rmdir
+ .long sys_dup
+ .long sys_pipe
+ .long sys_times
+ .long sys_ni_syscall /* was sys_prof */
+/* 45 */ .long sys_brk
+ .long sys_setgid16
+ .long sys_getgid16
+ .long sys_ni_syscall /* was sys_signal */
+ .long sys_geteuid16
+/* 50 */ .long sys_getegid16
+ .long sys_acct
+ .long sys_umount
+ .long sys_ni_syscall /* was sys_lock */
+ .long sys_ioctl
+/* 55 */ .long sys_fcntl
+ .long sys_ni_syscall /* was sys_mpx */
+ .long sys_setpgid
+ .long sys_ni_syscall /* was sys_ulimit */
+ .long sys_ni_syscall /* was sys_olduname */
+/* 60 */ .long sys_umask
+ .long sys_chroot
+ .long sys_ustat
+ .long sys_dup2
+ .long sys_getppid
+/* 65 */ .long sys_getpgrp
+ .long sys_setsid
+ .long sys_sigaction
+ .long sys_ni_syscall /* was sys_sgetmask */
+ .long sys_ni_syscall /* was sys_ssetmask */
+/* 70 */ .long sys_setreuid16
+ .long sys_setregid16
+ .long sys_sigsuspend_wrapper
+ .long sys_sigpending
+ .long sys_sethostname
+/* 75 */ .long sys_setrlimit
+ .long sys_old_getrlimit /* used by libc4 */
+ .long sys_getrusage
+ .long sys_gettimeofday
+ .long sys_settimeofday
+/* 80 */ .long sys_getgroups16
+ .long sys_setgroups16
+ .long old_select /* used by libc4 */
+ .long sys_symlink
+ .long sys_ni_syscall /* was sys_lstat */
+/* 85 */ .long sys_readlink
+ .long sys_uselib
+ .long sys_swapon
+ .long sys_reboot
+ .long old_readdir /* used by libc4 */
+/* 90 */ .long old_mmap /* used by libc4 */
+ .long sys_munmap
+ .long sys_truncate
+ .long sys_ftruncate
+ .long sys_fchmod
+/* 95 */ .long sys_fchown16
+ .long sys_getpriority
+ .long sys_setpriority
+ .long sys_ni_syscall /* was sys_profil */
+ .long sys_statfs
+/* 100 */ .long sys_fstatfs
+ .long sys_ni_syscall
+ .long sys_socketcall
+ .long sys_syslog
+ .long sys_setitimer
+/* 105 */ .long sys_getitimer
+ .long sys_newstat
+ .long sys_newlstat
+ .long sys_newfstat
+ .long sys_ni_syscall /* was sys_uname */
+/* 110 */ .long sys_ni_syscall /* was sys_iopl */
+ .long sys_vhangup
+ .long sys_ni_syscall
+ .long sys_syscall /* call a syscall */
+ .long sys_wait4
+/* 115 */ .long sys_swapoff
+ .long sys_sysinfo
+ .long sys_ipc
+ .long sys_fsync
+ .long sys_sigreturn_wrapper
+/* 120 */ .long sys_clone_wapper
+ .long sys_setdomainname
+ .long sys_newuname
+ .long sys_ni_syscall
+ .long sys_adjtimex
+/* 125 */ .long sys_mprotect
+ .long sys_sigprocmask
+ .long sys_ni_syscall /* WAS: sys_create_module */
+ .long sys_init_module
+ .long sys_delete_module
+/* 130 */ .long sys_ni_syscall /* WAS: sys_get_kernel_syms */
+ .long sys_quotactl
+ .long sys_getpgid
+ .long sys_fchdir
+ .long sys_bdflush
+/* 135 */ .long sys_sysfs
+ .long sys_personality
+ .long sys_ni_syscall /* .long _sys_afs_syscall */
+ .long sys_setfsuid16
+ .long sys_setfsgid16
+/* 140 */ .long sys_llseek
+ .long sys_getdents
+ .long sys_select
+ .long sys_flock
+ .long sys_msync
+/* 145 */ .long sys_readv
+ .long sys_writev
+ .long sys_getsid
+ .long sys_fdatasync
+ .long sys_sysctl
+/* 150 */ .long sys_mlock
+ .long sys_munlock
+ .long sys_mlockall
+ .long sys_munlockall
+ .long sys_sched_setparam
+/* 155 */ .long sys_sched_getparam
+ .long sys_sched_setscheduler
+ .long sys_sched_getscheduler
+ .long sys_sched_yield
+ .long sys_sched_get_priority_max
+/* 160 */ .long sys_sched_get_priority_min
+ .long sys_sched_rr_get_interval
+ .long sys_nanosleep
+ .long sys_arm_mremap
+ .long sys_setresuid16
+/* 165 */ .long sys_getresuid16
+ .long sys_ni_syscall
+ .long sys_ni_syscall /* WAS: sys_query_module */
+ .long sys_poll
+ .long sys_nfsservctl
+/* 170 */ .long sys_setresgid16
+ .long sys_getresgid16
+ .long sys_prctl
+ .long sys_rt_sigreturn_wrapper
+ .long sys_rt_sigaction
+/* 175 */ .long sys_rt_sigprocmask
+ .long sys_rt_sigpending
+ .long sys_rt_sigtimedwait
+ .long sys_rt_sigqueueinfo
+ .long sys_rt_sigsuspend_wrapper
+/* 180 */ .long sys_pread64
+ .long sys_pwrite64
+ .long sys_chown16
+ .long sys_getcwd
+ .long sys_capget
+/* 185 */ .long sys_capset
+ .long sys_sigaltstack_wrapper
+ .long sys_sendfile
+ .long sys_ni_syscall
+ .long sys_ni_syscall
+/* 190 */ .long sys_vfork_wrapper
+ .long sys_getrlimit
+ .long sys_mmap2
+ .long sys_truncate64
+ .long sys_ftruncate64
+/* 195 */ .long sys_stat64
+ .long sys_lstat64
+ .long sys_fstat64
+ .long sys_lchown
+ .long sys_getuid
+/* 200 */ .long sys_getgid
+ .long sys_geteuid
+ .long sys_getegid
+ .long sys_setreuid
+ .long sys_setregid
+/* 205 */ .long sys_getgroups
+ .long sys_setgroups
+ .long sys_fchown
+ .long sys_setresuid
+ .long sys_getresuid
+/* 210 */ .long sys_setresgid
+ .long sys_getresgid
+ .long sys_chown
+ .long sys_setuid
+ .long sys_setgid
+/* 215 */ .long sys_setfsuid
+ .long sys_setfsgid
+ .long sys_getdents64
+ .long sys_pivot_root
+ .long sys_mincore
+/* 220 */ .long sys_madvise
+ .long sys_fcntl64
+ .long sys_ni_syscall /* TUX */
+ .long sys_ni_syscall /* WAS: sys_security */
+ .long sys_gettid
+/* 225 */ .long sys_readahead
+ .long sys_setxattr
+ .long sys_lsetxattr
+ .long sys_fsetxattr
+ .long sys_getxattr
+/* 230 */ .long sys_lgetxattr
+ .long sys_fgetxattr
+ .long sys_listxattr
+ .long sys_llistxattr
+ .long sys_flistxattr
+/* 235 */ .long sys_removexattr
+ .long sys_lremovexattr
+ .long sys_fremovexattr
+ .long sys_tkill
+__syscall_end:
+
+ .rept NR_syscalls - (__syscall_end - __syscall_start) / 4
+ .long sys_ni_syscall
+ .endr
+#endif
diff --git a/arch/arm26/kernel/compat.c b/arch/arm26/kernel/compat.c
new file mode 100644
index 0000000..db0310d
--- /dev/null
+++ b/arch/arm26/kernel/compat.c
@@ -0,0 +1,174 @@
+/*
+ * linux/arch/arm26/kernel/compat.c
+ *
+ * Copyright (C) 2001 Russell King
+ * 2003 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * We keep the old params compatibility cruft in one place (here)
+ * so we don't end up with lots of mess around other places.
+ *
+ * NOTE:
+ * The old struct param_struct is deprecated, but it will be kept in
+ * the kernel for 5 years from now (2001). This will allow boot loaders
+ * to convert to the new struct tag way.
+ */
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/init.h>
+
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/page.h>
+
+//#include <asm/arch.h>
+//#include <asm/mach/irq.h>
+
+/*
+ * Usage:
+ * - do not go blindly adding fields, add them at the end
+ * - when adding fields, don't rely on the address until
+ * a patch from me has been released
+ * - unused fields should be zero (for future expansion)
+ * - this structure is relatively short-lived - only
+ * guaranteed to contain useful data in setup_arch()
+ *
+ * This is the old deprecated way to pass parameters to the kernel
+ */
+struct param_struct {
+ union {
+ struct {
+ unsigned long page_size; /* 0 */
+ unsigned long nr_pages; /* 4 */
+ unsigned long ramdisk_size; /* 8 */
+ unsigned long flags; /* 12 */
+#define FLAG_READONLY 1
+#define FLAG_RDLOAD 4
+#define FLAG_RDPROMPT 8
+ unsigned long rootdev; /* 16 */
+ unsigned long video_num_cols; /* 20 */
+ unsigned long video_num_rows; /* 24 */
+ unsigned long video_x; /* 28 */
+ unsigned long video_y; /* 32 */
+ unsigned long memc_control_reg; /* 36 */
+ unsigned char sounddefault; /* 40 */
+ unsigned char adfsdrives; /* 41 */
+ unsigned char bytes_per_char_h; /* 42 */
+ unsigned char bytes_per_char_v; /* 43 */
+ unsigned long pages_in_bank[4]; /* 44 */
+ unsigned long pages_in_vram; /* 60 */
+ unsigned long initrd_start; /* 64 */
+ unsigned long initrd_size; /* 68 */
+ unsigned long rd_start; /* 72 */
+ unsigned long system_rev; /* 76 */
+ unsigned long system_serial_low; /* 80 */
+ unsigned long system_serial_high; /* 84 */
+ unsigned long mem_fclk_21285; /* 88 */
+ } s;
+ char unused[256];
+ } u1;
+ union {
+ char paths[8][128];
+ struct {
+ unsigned long magic;
+ char n[1024 - sizeof(unsigned long)];
+ } s;
+ } u2;
+ char commandline[COMMAND_LINE_SIZE];
+};
+
+static struct tag * __init memtag(struct tag *tag, unsigned long start, unsigned long size)
+{
+ tag = tag_next(tag);
+ tag->hdr.tag = ATAG_MEM;
+ tag->hdr.size = tag_size(tag_mem32);
+ tag->u.mem.size = size;
+ tag->u.mem.start = start;
+
+ return tag;
+}
+
+static void __init build_tag_list(struct param_struct *params, void *taglist)
+{
+ struct tag *tag = taglist;
+
+ if (params->u1.s.page_size != PAGE_SIZE) {
+ printk(KERN_WARNING "Warning: bad configuration page, "
+ "trying to continue\n");
+ return;
+ }
+
+ printk(KERN_DEBUG "Converting old-style param struct to taglist\n");
+
+ tag->hdr.tag = ATAG_CORE;
+ tag->hdr.size = tag_size(tag_core);
+ tag->u.core.flags = params->u1.s.flags & FLAG_READONLY;
+ tag->u.core.pagesize = params->u1.s.page_size;
+ tag->u.core.rootdev = params->u1.s.rootdev;
+
+ tag = tag_next(tag);
+ tag->hdr.tag = ATAG_RAMDISK;
+ tag->hdr.size = tag_size(tag_ramdisk);
+ tag->u.ramdisk.flags = (params->u1.s.flags & FLAG_RDLOAD ? 1 : 0) |
+ (params->u1.s.flags & FLAG_RDPROMPT ? 2 : 0);
+ tag->u.ramdisk.size = params->u1.s.ramdisk_size;
+ tag->u.ramdisk.start = params->u1.s.rd_start;
+
+ tag = tag_next(tag);
+ tag->hdr.tag = ATAG_INITRD;
+ tag->hdr.size = tag_size(tag_initrd);
+ tag->u.initrd.start = params->u1.s.initrd_start;
+ tag->u.initrd.size = params->u1.s.initrd_size;
+
+ tag = tag_next(tag);
+ tag->hdr.tag = ATAG_SERIAL;
+ tag->hdr.size = tag_size(tag_serialnr);
+ tag->u.serialnr.low = params->u1.s.system_serial_low;
+ tag->u.serialnr.high = params->u1.s.system_serial_high;
+
+ tag = tag_next(tag);
+ tag->hdr.tag = ATAG_REVISION;
+ tag->hdr.size = tag_size(tag_revision);
+ tag->u.revision.rev = params->u1.s.system_rev;
+
+ tag = memtag(tag, PHYS_OFFSET, params->u1.s.nr_pages * PAGE_SIZE);
+
+ tag = tag_next(tag);
+ tag->hdr.tag = ATAG_ACORN;
+ tag->hdr.size = tag_size(tag_acorn);
+ tag->u.acorn.memc_control_reg = params->u1.s.memc_control_reg;
+ tag->u.acorn.vram_pages = params->u1.s.pages_in_vram;
+ tag->u.acorn.sounddefault = params->u1.s.sounddefault;
+ tag->u.acorn.adfsdrives = params->u1.s.adfsdrives;
+
+ tag = tag_next(tag);
+ tag->hdr.tag = ATAG_CMDLINE;
+ tag->hdr.size = (strlen(params->commandline) + 3 +
+ sizeof(struct tag_header)) >> 2;
+ strcpy(tag->u.cmdline.cmdline, params->commandline);
+
+ tag = tag_next(tag);
+ tag->hdr.tag = ATAG_NONE;
+ tag->hdr.size = 0;
+
+ memmove(params, taglist, ((int)tag) - ((int)taglist) +
+ sizeof(struct tag_header));
+}
+
+void __init convert_to_tag_list(struct tag *tags)
+{
+ struct param_struct *params = (struct param_struct *)tags;
+ build_tag_list(params, &params->u2);
+}
+
+void __init squash_mem_tags(struct tag *tag)
+{
+ for (; tag->hdr.size; tag = tag_next(tag))
+ if (tag->hdr.tag == ATAG_MEM)
+ tag->hdr.tag = ATAG_NONE;
+}
diff --git a/arch/arm26/kernel/dma.c b/arch/arm26/kernel/dma.c
new file mode 100644
index 0000000..80b5a77
--- /dev/null
+++ b/arch/arm26/kernel/dma.c
@@ -0,0 +1,273 @@
+/*
+ * linux/arch/arm26/kernel/dma.c
+ *
+ * Copyright (C) 1995-2000 Russell King
+ * 2003 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Front-end to the DMA handling. This handles the allocation/freeing
+ * of DMA channels, and provides a unified interface to the machines
+ * DMA facilities.
+ */
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/mman.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+
+#include <asm/dma.h>
+
+DEFINE_SPINLOCK(dma_spin_lock);
+
+static dma_t dma_chan[MAX_DMA_CHANNELS];
+
+/*
+ * Get dma list for /proc/dma
+ */
+int get_dma_list(char *buf)
+{
+ dma_t *dma;
+ char *p = buf;
+ int i;
+
+ for (i = 0, dma = dma_chan; i < MAX_DMA_CHANNELS; i++, dma++)
+ if (dma->lock)
+ p += sprintf(p, "%2d: %14s %s\n", i,
+ dma->d_ops->type, dma->device_id);
+
+ return p - buf;
+}
+
+/*
+ * Request DMA channel
+ *
+ * On certain platforms, we have to allocate an interrupt as well...
+ */
+int request_dma(dmach_t channel, const char *device_id)
+{
+ dma_t *dma = dma_chan + channel;
+ int ret;
+
+ if (channel >= MAX_DMA_CHANNELS || !dma->d_ops)
+ goto bad_dma;
+
+ if (xchg(&dma->lock, 1) != 0)
+ goto busy;
+
+ dma->device_id = device_id;
+ dma->active = 0;
+ dma->invalid = 1;
+
+ ret = 0;
+ if (dma->d_ops->request)
+ ret = dma->d_ops->request(channel, dma);
+
+ if (ret)
+ xchg(&dma->lock, 0);
+
+ return ret;
+
+bad_dma:
+ printk(KERN_ERR "dma: trying to allocate DMA%d\n", channel);
+ return -EINVAL;
+
+busy:
+ return -EBUSY;
+}
+
+/*
+ * Free DMA channel
+ *
+ * On certain platforms, we have to free interrupt as well...
+ */
+void free_dma(dmach_t channel)
+{
+ dma_t *dma = dma_chan + channel;
+
+ if (channel >= MAX_DMA_CHANNELS || !dma->d_ops)
+ goto bad_dma;
+
+ if (dma->active) {
+ printk(KERN_ERR "dma%d: freeing active DMA\n", channel);
+ dma->d_ops->disable(channel, dma);
+ dma->active = 0;
+ }
+
+ if (xchg(&dma->lock, 0) != 0) {
+ if (dma->d_ops->free)
+ dma->d_ops->free(channel, dma);
+ return;
+ }
+
+ printk(KERN_ERR "dma%d: trying to free free DMA\n", channel);
+ return;
+
+bad_dma:
+ printk(KERN_ERR "dma: trying to free DMA%d\n", channel);
+}
+
+/* Set DMA Scatter-Gather list
+ */
+void set_dma_sg (dmach_t channel, struct scatterlist *sg, int nr_sg)
+{
+ dma_t *dma = dma_chan + channel;
+
+ if (dma->active)
+ printk(KERN_ERR "dma%d: altering DMA SG while "
+ "DMA active\n", channel);
+
+ dma->sg = sg;
+ dma->sgcount = nr_sg;
+ dma->using_sg = 1;
+ dma->invalid = 1;
+}
+
+/* Set DMA address
+ *
+ * Copy address to the structure, and set the invalid bit
+ */
+void set_dma_addr (dmach_t channel, unsigned long physaddr)
+{
+ dma_t *dma = dma_chan + channel;
+
+ if (dma->active)
+ printk(KERN_ERR "dma%d: altering DMA address while "
+ "DMA active\n", channel);
+
+ dma->sg = &dma->buf;
+ dma->sgcount = 1;
+ dma->buf.__address = (char *)physaddr;//FIXME - not pretty
+ dma->using_sg = 0;
+ dma->invalid = 1;
+}
+
+/* Set DMA byte count
+ *
+ * Copy address to the structure, and set the invalid bit
+ */
+void set_dma_count (dmach_t channel, unsigned long count)
+{
+ dma_t *dma = dma_chan + channel;
+
+ if (dma->active)
+ printk(KERN_ERR "dma%d: altering DMA count while "
+ "DMA active\n", channel);
+
+ dma->sg = &dma->buf;
+ dma->sgcount = 1;
+ dma->buf.length = count;
+ dma->using_sg = 0;
+ dma->invalid = 1;
+}
+
+/* Set DMA direction mode
+ */
+void set_dma_mode (dmach_t channel, dmamode_t mode)
+{
+ dma_t *dma = dma_chan + channel;
+
+ if (dma->active)
+ printk(KERN_ERR "dma%d: altering DMA mode while "
+ "DMA active\n", channel);
+
+ dma->dma_mode = mode;
+ dma->invalid = 1;
+}
+
+/* Enable DMA channel
+ */
+void enable_dma (dmach_t channel)
+{
+ dma_t *dma = dma_chan + channel;
+
+ if (!dma->lock)
+ goto free_dma;
+
+ if (dma->active == 0) {
+ dma->active = 1;
+ dma->d_ops->enable(channel, dma);
+ }
+ return;
+
+free_dma:
+ printk(KERN_ERR "dma%d: trying to enable free DMA\n", channel);
+ BUG();
+}
+
+/* Disable DMA channel
+ */
+void disable_dma (dmach_t channel)
+{
+ dma_t *dma = dma_chan + channel;
+
+ if (!dma->lock)
+ goto free_dma;
+
+ if (dma->active == 1) {
+ dma->active = 0;
+ dma->d_ops->disable(channel, dma);
+ }
+ return;
+
+free_dma:
+ printk(KERN_ERR "dma%d: trying to disable free DMA\n", channel);
+ BUG();
+}
+
+/*
+ * Is the specified DMA channel active?
+ */
+int dma_channel_active(dmach_t channel)
+{
+ return dma_chan[channel].active;
+}
+
+void set_dma_page(dmach_t channel, char pagenr)
+{
+ printk(KERN_ERR "dma%d: trying to set_dma_page\n", channel);
+}
+
+void set_dma_speed(dmach_t channel, int cycle_ns)
+{
+ dma_t *dma = dma_chan + channel;
+ int ret = 0;
+
+ if (dma->d_ops->setspeed)
+ ret = dma->d_ops->setspeed(channel, dma, cycle_ns);
+ dma->speed = ret;
+}
+
+int get_dma_residue(dmach_t channel)
+{
+ dma_t *dma = dma_chan + channel;
+ int ret = 0;
+
+ if (dma->d_ops->residue)
+ ret = dma->d_ops->residue(channel, dma);
+
+ return ret;
+}
+
+void __init init_dma(void)
+{
+ arch_dma_init(dma_chan);
+}
+
+EXPORT_SYMBOL(request_dma);
+EXPORT_SYMBOL(free_dma);
+EXPORT_SYMBOL(enable_dma);
+EXPORT_SYMBOL(disable_dma);
+EXPORT_SYMBOL(set_dma_addr);
+EXPORT_SYMBOL(set_dma_count);
+EXPORT_SYMBOL(set_dma_mode);
+EXPORT_SYMBOL(set_dma_page);
+EXPORT_SYMBOL(get_dma_residue);
+EXPORT_SYMBOL(set_dma_sg);
+EXPORT_SYMBOL(set_dma_speed);
+
+EXPORT_SYMBOL(dma_spin_lock);
diff --git a/arch/arm26/kernel/ecard.c b/arch/arm26/kernel/ecard.c
new file mode 100644
index 0000000..824c6b5
--- /dev/null
+++ b/arch/arm26/kernel/ecard.c
@@ -0,0 +1,850 @@
+/*
+ * linux/arch/arm26/kernel/ecard.c
+ *
+ * Copyright 1995-2001 Russell King
+ * Copyright 2003 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Find all installed expansion cards, and handle interrupts from them.
+ *
+ * Created from information from Acorns RiscOS3 PRMs
+ * 15-Jun-2003 IM Modified from ARM32 (RiscPC capable) version
+ * 10-Jan-1999 RMK Run loaders in a simulated RISC OS environment.
+ * 06-May-1997 RMK Added blacklist for cards whose loader doesn't work.
+ * 12-Sep-1997 RMK Created new handling of interrupt enables/disables
+ * - cards can now register their own routine to control
+ * interrupts (recommended).
+ * 29-Sep-1997 RMK Expansion card interrupt hardware not being re-enabled
+ * on reset from Linux. (Caused cards not to respond
+ * under RiscOS without hard reset).
+ *
+ */
+#define ECARD_C
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/device.h>
+#include <linux/init.h>
+
+#include <asm/dma.h>
+#include <asm/ecard.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/mmu_context.h>
+#include <asm/irqchip.h>
+#include <asm/tlbflush.h>
+
+enum req {
+ req_readbytes,
+ req_reset
+};
+
+struct ecard_request {
+ enum req req;
+ ecard_t *ec;
+ unsigned int address;
+ unsigned int length;
+ unsigned int use_loader;
+ void *buffer;
+};
+
+struct expcard_blacklist {
+ unsigned short manufacturer;
+ unsigned short product;
+ const char *type;
+};
+
+static ecard_t *cards;
+static ecard_t *slot_to_expcard[MAX_ECARDS];
+static unsigned int ectcr;
+
+/* List of descriptions of cards which don't have an extended
+ * identification, or chunk directories containing a description.
+ */
+static struct expcard_blacklist __initdata blacklist[] = {
+ { MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" }
+};
+
+asmlinkage extern int
+ecard_loader_reset(volatile unsigned char *pa, loader_t loader);
+asmlinkage extern int
+ecard_loader_read(int off, volatile unsigned char *pa, loader_t loader);
+
+static const struct ecard_id *
+ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec);
+
+static inline unsigned short
+ecard_getu16(unsigned char *v)
+{
+ return v[0] | v[1] << 8;
+}
+
+static inline signed long
+ecard_gets24(unsigned char *v)
+{
+ return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0);
+}
+
+static inline ecard_t *
+slot_to_ecard(unsigned int slot)
+{
+ return slot < MAX_ECARDS ? slot_to_expcard[slot] : NULL;
+}
+
+/* ===================== Expansion card daemon ======================== */
+/*
+ * Since the loader programs on the expansion cards need to be run
+ * in a specific environment, create a separate task with this
+ * environment up, and pass requests to this task as and when we
+ * need to.
+ *
+ * This should allow 99% of loaders to be called from Linux.
+ *
+ * From a security standpoint, we trust the card vendors. This
+ * may be a misplaced trust.
+ */
+#define BUS_ADDR(x) ((((unsigned long)(x)) << 2) + IO_BASE)
+#define POD_INT_ADDR(x) ((volatile unsigned char *)\
+ ((BUS_ADDR((x)) - IO_BASE) + IO_START))
+
+static inline void ecard_task_reset(struct ecard_request *req)
+{
+ struct expansion_card *ec = req->ec;
+ if (ec->loader)
+ ecard_loader_reset(POD_INT_ADDR(ec->podaddr), ec->loader);
+}
+
+static void
+ecard_task_readbytes(struct ecard_request *req)
+{
+ unsigned char *buf = (unsigned char *)req->buffer;
+ volatile unsigned char *base_addr =
+ (volatile unsigned char *)POD_INT_ADDR(req->ec->podaddr);
+ unsigned int len = req->length;
+ unsigned int off = req->address;
+
+ if (!req->use_loader || !req->ec->loader) {
+ off *= 4;
+ while (len--) {
+ *buf++ = base_addr[off];
+ off += 4;
+ }
+ } else {
+ while(len--) {
+ /*
+ * The following is required by some
+ * expansion card loader programs.
+ */
+ *(unsigned long *)0x108 = 0;
+ *buf++ = ecard_loader_read(off++, base_addr,
+ req->ec->loader);
+ }
+ }
+}
+
+static void ecard_do_request(struct ecard_request *req)
+{
+ switch (req->req) {
+ case req_readbytes:
+ ecard_task_readbytes(req);
+ break;
+
+ case req_reset:
+ ecard_task_reset(req);
+ break;
+ }
+}
+
+/*
+ * On 26-bit processors, we don't need the kcardd thread to access the
+ * expansion card loaders. We do it directly.
+ */
+#define ecard_call(req) ecard_do_request(req)
+
+/* ======================= Mid-level card control ===================== */
+
+static void
+ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld)
+{
+ struct ecard_request req;
+
+ req.req = req_readbytes;
+ req.ec = ec;
+ req.address = off;
+ req.length = len;
+ req.use_loader = useld;
+ req.buffer = addr;
+
+ ecard_call(&req);
+}
+
+int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num)
+{
+ struct ex_chunk_dir excd;
+ int index = 16;
+ int useld = 0;
+
+ if (!ec->cid.cd)
+ return 0;
+
+ while(1) {
+ ecard_readbytes(&excd, ec, index, 8, useld);
+ index += 8;
+ if (c_id(&excd) == 0) {
+ if (!useld && ec->loader) {
+ useld = 1;
+ index = 0;
+ continue;
+ }
+ return 0;
+ }
+ if (c_id(&excd) == 0xf0) { /* link */
+ index = c_start(&excd);
+ continue;
+ }
+ if (c_id(&excd) == 0x80) { /* loader */
+ if (!ec->loader) {
+ ec->loader = (loader_t)kmalloc(c_len(&excd),
+ GFP_KERNEL);
+ if (ec->loader)
+ ecard_readbytes(ec->loader, ec,
+ (int)c_start(&excd),
+ c_len(&excd), useld);
+ else
+ return 0;
+ }
+ continue;
+ }
+ if (c_id(&excd) == id && num-- == 0)
+ break;
+ }
+
+ if (c_id(&excd) & 0x80) {
+ switch (c_id(&excd) & 0x70) {
+ case 0x70:
+ ecard_readbytes((unsigned char *)excd.d.string, ec,
+ (int)c_start(&excd), c_len(&excd),
+ useld);
+ break;
+ case 0x00:
+ break;
+ }
+ }
+ cd->start_offset = c_start(&excd);
+ memcpy(cd->d.string, excd.d.string, 256);
+ return 1;
+}
+
+/* ======================= Interrupt control ============================ */
+
+static void ecard_def_irq_enable(ecard_t *ec, int irqnr)
+{
+}
+
+static void ecard_def_irq_disable(ecard_t *ec, int irqnr)
+{
+}
+
+static int ecard_def_irq_pending(ecard_t *ec)
+{
+ return !ec->irqmask || ec->irqaddr[0] & ec->irqmask;
+}
+
+static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr)
+{
+ panic("ecard_def_fiq_enable called - impossible");
+}
+
+static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr)
+{
+ panic("ecard_def_fiq_disable called - impossible");
+}
+
+static int ecard_def_fiq_pending(ecard_t *ec)
+{
+ return !ec->fiqmask || ec->fiqaddr[0] & ec->fiqmask;
+}
+
+static expansioncard_ops_t ecard_default_ops = {
+ ecard_def_irq_enable,
+ ecard_def_irq_disable,
+ ecard_def_irq_pending,
+ ecard_def_fiq_enable,
+ ecard_def_fiq_disable,
+ ecard_def_fiq_pending
+};
+
+/*
+ * Enable and disable interrupts from expansion cards.
+ * (interrupts are disabled for these functions).
+ *
+ * They are not meant to be called directly, but via enable/disable_irq.
+ */
+static void ecard_irq_unmask(unsigned int irqnr)
+{
+ ecard_t *ec = slot_to_ecard(irqnr - 32);
+
+ if (ec) {
+ if (!ec->ops)
+ ec->ops = &ecard_default_ops;
+
+ if (ec->claimed && ec->ops->irqenable)
+ ec->ops->irqenable(ec, irqnr);
+ else
+ printk(KERN_ERR "ecard: rejecting request to "
+ "enable IRQs for %d\n", irqnr);
+ }
+}
+
+static void ecard_irq_mask(unsigned int irqnr)
+{
+ ecard_t *ec = slot_to_ecard(irqnr - 32);
+
+ if (ec) {
+ if (!ec->ops)
+ ec->ops = &ecard_default_ops;
+
+ if (ec->ops && ec->ops->irqdisable)
+ ec->ops->irqdisable(ec, irqnr);
+ }
+}
+
+static struct irqchip ecard_chip = {
+ .ack = ecard_irq_mask,
+ .mask = ecard_irq_mask,
+ .unmask = ecard_irq_unmask,
+};
+
+void ecard_enablefiq(unsigned int fiqnr)
+{
+ ecard_t *ec = slot_to_ecard(fiqnr);
+
+ if (ec) {
+ if (!ec->ops)
+ ec->ops = &ecard_default_ops;
+
+ if (ec->claimed && ec->ops->fiqenable)
+ ec->ops->fiqenable(ec, fiqnr);
+ else
+ printk(KERN_ERR "ecard: rejecting request to "
+ "enable FIQs for %d\n", fiqnr);
+ }
+}
+
+void ecard_disablefiq(unsigned int fiqnr)
+{
+ ecard_t *ec = slot_to_ecard(fiqnr);
+
+ if (ec) {
+ if (!ec->ops)
+ ec->ops = &ecard_default_ops;
+
+ if (ec->ops->fiqdisable)
+ ec->ops->fiqdisable(ec, fiqnr);
+ }
+}
+
+static void
+ecard_dump_irq_state(ecard_t *ec)
+{
+ printk(" %d: %sclaimed, ",
+ ec->slot_no,
+ ec->claimed ? "" : "not ");
+
+ if (ec->ops && ec->ops->irqpending &&
+ ec->ops != &ecard_default_ops)
+ printk("irq %spending\n",
+ ec->ops->irqpending(ec) ? "" : "not ");
+ else
+ printk("irqaddr %p, mask = %02X, status = %02X\n",
+ ec->irqaddr, ec->irqmask, *ec->irqaddr);
+}
+
+static void ecard_check_lockup(struct irqdesc *desc)
+{
+ static int last, lockup;
+ ecard_t *ec;
+
+ /*
+ * If the timer interrupt has not run since the last million
+ * unrecognised expansion card interrupts, then there is
+ * something seriously wrong. Disable the expansion card
+ * interrupts so at least we can continue.
+ *
+ * Maybe we ought to start a timer to re-enable them some time
+ * later?
+ */
+ if (last == jiffies) {
+ lockup += 1;
+ if (lockup > 1000000) {
+ printk(KERN_ERR "\nInterrupt lockup detected - "
+ "disabling all expansion card interrupts\n");
+
+ desc->chip->mask(IRQ_EXPANSIONCARD);
+
+ printk("Expansion card IRQ state:\n");
+
+ for (ec = cards; ec; ec = ec->next)
+ ecard_dump_irq_state(ec);
+ }
+ } else
+ lockup = 0;
+
+ /*
+ * If we did not recognise the source of this interrupt,
+ * warn the user, but don't flood the user with these messages.
+ */
+ if (!last || time_after(jiffies, (unsigned long)(last + 5*HZ))) {
+ last = jiffies;
+ printk(KERN_WARNING "Unrecognised interrupt from backplane\n");
+ }
+}
+
+static void
+ecard_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
+{
+ ecard_t *ec;
+ int called = 0;
+
+ desc->chip->mask(irq);
+ for (ec = cards; ec; ec = ec->next) {
+ int pending;
+
+ if (!ec->claimed || ec->irq == NO_IRQ)
+ continue;
+
+ if (ec->ops && ec->ops->irqpending)
+ pending = ec->ops->irqpending(ec);
+ else
+ pending = ecard_default_ops.irqpending(ec);
+
+ if (pending) {
+ struct irqdesc *d = irq_desc + ec->irq;
+ d->handle(ec->irq, d, regs);
+ called ++;
+ }
+ }
+ desc->chip->unmask(irq);
+
+ if (called == 0)
+ ecard_check_lockup(desc);
+}
+
+#define ecard_irqexp_handler NULL
+#define ecard_probeirqhw() (0)
+
+unsigned int ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed)
+{
+ unsigned long address = 0;
+ int slot = ec->slot_no;
+
+ ectcr &= ~(1 << slot);
+
+ switch (type) {
+ case ECARD_MEMC:
+ address = IO_EC_MEMC_BASE + (slot << 12);
+ break;
+
+ case ECARD_IOC:
+ address = IO_EC_IOC_BASE + (slot << 12) + (speed << 17);
+ break;
+
+ default:
+ break;
+ }
+
+ return address;
+}
+
+static int ecard_prints(char *buffer, ecard_t *ec)
+{
+ char *start = buffer;
+
+ buffer += sprintf(buffer, " %d: ", ec->slot_no);
+
+ if (ec->cid.id == 0) {
+ struct in_chunk_dir incd;
+
+ buffer += sprintf(buffer, "[%04X:%04X] ",
+ ec->cid.manufacturer, ec->cid.product);
+
+ if (!ec->card_desc && ec->cid.cd &&
+ ecard_readchunk(&incd, ec, 0xf5, 0)) {
+ ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL);
+
+ if (ec->card_desc)
+ strcpy((char *)ec->card_desc, incd.d.string);
+ }
+
+ buffer += sprintf(buffer, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*");
+ } else
+ buffer += sprintf(buffer, "Simple card %d\n", ec->cid.id);
+
+ return buffer - start;
+}
+
+static int get_ecard_dev_info(char *buf, char **start, off_t pos, int count)
+{
+ ecard_t *ec = cards;
+ off_t at = 0;
+ int len, cnt;
+
+ cnt = 0;
+ while (ec && count > cnt) {
+ len = ecard_prints(buf, ec);
+ at += len;
+ if (at >= pos) {
+ if (!*start) {
+ *start = buf + (pos - (at - len));
+ cnt = at - pos;
+ } else
+ cnt += len;
+ buf += len;
+ }
+ ec = ec->next;
+ }
+ return (count > cnt) ? cnt : count;
+}
+
+static struct proc_dir_entry *proc_bus_ecard_dir = NULL;
+
+static void ecard_proc_init(void)
+{
+ proc_bus_ecard_dir = proc_mkdir("ecard", proc_bus);
+ create_proc_info_entry("devices", 0, proc_bus_ecard_dir,
+ get_ecard_dev_info);
+}
+
+#define ec_set_resource(ec,nr,st,sz,flg) \
+ do { \
+ (ec)->resource[nr].name = ec->dev.bus_id; \
+ (ec)->resource[nr].start = st; \
+ (ec)->resource[nr].end = (st) + (sz) - 1; \
+ (ec)->resource[nr].flags = flg; \
+ } while (0)
+
+static void __init ecard_init_resources(struct expansion_card *ec)
+{
+ unsigned long base = PODSLOT_IOC0_BASE;
+ unsigned int slot = ec->slot_no;
+ int i;
+
+ ec_set_resource(ec, ECARD_RES_MEMC,
+ PODSLOT_MEMC_BASE + (slot << 14),
+ PODSLOT_MEMC_SIZE, IORESOURCE_MEM);
+
+ for (i = 0; i < ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++) {
+ ec_set_resource(ec, i + ECARD_RES_IOCSLOW,
+ base + (slot << 14) + (i << 19),
+ PODSLOT_IOC_SIZE, IORESOURCE_MEM);
+ }
+
+ for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
+ if (ec->resource[i].start &&
+ request_resource(&iomem_resource, &ec->resource[i])) {
+ printk(KERN_ERR "%s: resource(s) not available\n",
+ ec->dev.bus_id);
+ ec->resource[i].end -= ec->resource[i].start;
+ ec->resource[i].start = 0;
+ }
+ }
+}
+
+static ssize_t ecard_show_irq(struct device *dev, char *buf)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ return sprintf(buf, "%u\n", ec->irq);
+}
+
+static ssize_t ecard_show_vendor(struct device *dev, char *buf)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ return sprintf(buf, "%u\n", ec->cid.manufacturer);
+}
+
+static ssize_t ecard_show_device(struct device *dev, char *buf)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ return sprintf(buf, "%u\n", ec->cid.product);
+}
+
+static ssize_t ecard_show_dma(struct device *dev, char *buf)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ return sprintf(buf, "%u\n", ec->dma);
+}
+
+static ssize_t ecard_show_resources(struct device *dev, char *buf)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ char *str = buf;
+ int i;
+
+ for (i = 0; i < ECARD_NUM_RESOURCES; i++)
+ str += sprintf(str, "%08lx %08lx %08lx\n",
+ ec->resource[i].start,
+ ec->resource[i].end,
+ ec->resource[i].flags);
+
+ return str - buf;
+}
+
+static DEVICE_ATTR(irq, S_IRUGO, ecard_show_irq, NULL);
+static DEVICE_ATTR(vendor, S_IRUGO, ecard_show_vendor, NULL);
+static DEVICE_ATTR(device, S_IRUGO, ecard_show_device, NULL);
+static DEVICE_ATTR(dma, S_IRUGO, ecard_show_dma, NULL);
+static DEVICE_ATTR(resource, S_IRUGO, ecard_show_resources, NULL);
+
+/*
+ * Probe for an expansion card.
+ *
+ * If bit 1 of the first byte of the card is set, then the
+ * card does not exist.
+ */
+static int __init
+ecard_probe(int slot, card_type_t type)
+{
+ ecard_t **ecp;
+ ecard_t *ec;
+ struct ex_ecid cid;
+ int i, rc = -ENOMEM;
+
+ ec = kmalloc(sizeof(ecard_t), GFP_KERNEL);
+ if (!ec)
+ goto nomem;
+
+ memset(ec, 0, sizeof(ecard_t));
+
+ ec->slot_no = slot;
+ ec->type = type;
+ ec->irq = NO_IRQ;
+ ec->fiq = NO_IRQ;
+ ec->dma = NO_DMA;
+ ec->card_desc = NULL;
+ ec->ops = &ecard_default_ops;
+
+ rc = -ENODEV;
+ if ((ec->podaddr = ecard_address(ec, type, ECARD_SYNC)) == 0)
+ goto nodev;
+
+ cid.r_zero = 1;
+ ecard_readbytes(&cid, ec, 0, 16, 0);
+ if (cid.r_zero)
+ goto nodev;
+
+ ec->cid.id = cid.r_id;
+ ec->cid.cd = cid.r_cd;
+ ec->cid.is = cid.r_is;
+ ec->cid.w = cid.r_w;
+ ec->cid.manufacturer = ecard_getu16(cid.r_manu);
+ ec->cid.product = ecard_getu16(cid.r_prod);
+ ec->cid.country = cid.r_country;
+ ec->cid.irqmask = cid.r_irqmask;
+ ec->cid.irqoff = ecard_gets24(cid.r_irqoff);
+ ec->cid.fiqmask = cid.r_fiqmask;
+ ec->cid.fiqoff = ecard_gets24(cid.r_fiqoff);
+ ec->fiqaddr =
+ ec->irqaddr = (unsigned char *)ioaddr(ec->podaddr);
+
+ if (ec->cid.is) {
+ ec->irqmask = ec->cid.irqmask;
+ ec->irqaddr += ec->cid.irqoff;
+ ec->fiqmask = ec->cid.fiqmask;
+ ec->fiqaddr += ec->cid.fiqoff;
+ } else {
+ ec->irqmask = 1;
+ ec->fiqmask = 4;
+ }
+
+ for (i = 0; i < sizeof(blacklist) / sizeof(*blacklist); i++)
+ if (blacklist[i].manufacturer == ec->cid.manufacturer &&
+ blacklist[i].product == ec->cid.product) {
+ ec->card_desc = blacklist[i].type;
+ break;
+ }
+
+ snprintf(ec->dev.bus_id, sizeof(ec->dev.bus_id), "ecard%d", slot);
+ ec->dev.parent = NULL;
+ ec->dev.bus = &ecard_bus_type;
+ ec->dev.dma_mask = &ec->dma_mask;
+ ec->dma_mask = (u64)0xffffffff;
+
+ ecard_init_resources(ec);
+
+ /*
+ * hook the interrupt handlers
+ */
+ ec->irq = 32 + slot;
+ set_irq_chip(ec->irq, &ecard_chip);
+ set_irq_handler(ec->irq, do_level_IRQ);
+ set_irq_flags(ec->irq, IRQF_VALID);
+
+ for (ecp = &cards; *ecp; ecp = &(*ecp)->next);
+
+ *ecp = ec;
+ slot_to_expcard[slot] = ec;
+
+ device_register(&ec->dev);
+ device_create_file(&ec->dev, &dev_attr_dma);
+ device_create_file(&ec->dev, &dev_attr_irq);
+ device_create_file(&ec->dev, &dev_attr_resource);
+ device_create_file(&ec->dev, &dev_attr_vendor);
+ device_create_file(&ec->dev, &dev_attr_device);
+
+ return 0;
+
+nodev:
+ kfree(ec);
+nomem:
+ return rc;
+}
+
+/*
+ * Initialise the expansion card system.
+ * Locate all hardware - interrupt management and
+ * actual cards.
+ */
+static int __init ecard_init(void)
+{
+ int slot, irqhw;
+
+ printk("Probing expansion cards\n");
+
+ for (slot = 0; slot < MAX_ECARDS; slot ++) {
+ ecard_probe(slot, ECARD_IOC);
+ }
+
+ irqhw = ecard_probeirqhw();
+
+ set_irq_chained_handler(IRQ_EXPANSIONCARD,
+ irqhw ? ecard_irqexp_handler : ecard_irq_handler);
+
+ ecard_proc_init();
+
+ return 0;
+}
+
+subsys_initcall(ecard_init);
+
+/*
+ * ECARD "bus"
+ */
+static const struct ecard_id *
+ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec)
+{
+ int i;
+
+ for (i = 0; ids[i].manufacturer != 65535; i++)
+ if (ec->cid.manufacturer == ids[i].manufacturer &&
+ ec->cid.product == ids[i].product)
+ return ids + i;
+
+ return NULL;
+}
+
+static int ecard_drv_probe(struct device *dev)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ struct ecard_driver *drv = ECARD_DRV(dev->driver);
+ const struct ecard_id *id;
+ int ret;
+
+ id = ecard_match_device(drv->id_table, ec);
+
+ ecard_claim(ec);
+ ret = drv->probe(ec, id);
+ if (ret)
+ ecard_release(ec);
+ return ret;
+}
+
+static int ecard_drv_remove(struct device *dev)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ struct ecard_driver *drv = ECARD_DRV(dev->driver);
+
+ drv->remove(ec);
+ ecard_release(ec);
+
+ return 0;
+}
+
+/*
+ * Before rebooting, we must make sure that the expansion card is in a
+ * sensible state, so it can be re-detected. This means that the first
+ * page of the ROM must be visible. We call the expansion cards reset
+ * handler, if any.
+ */
+static void ecard_drv_shutdown(struct device *dev)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ struct ecard_driver *drv = ECARD_DRV(dev->driver);
+ struct ecard_request req;
+
+ if (drv->shutdown)
+ drv->shutdown(ec);
+ ecard_release(ec);
+ req.req = req_reset;
+ req.ec = ec;
+ ecard_call(&req);
+}
+
+int ecard_register_driver(struct ecard_driver *drv)
+{
+ drv->drv.bus = &ecard_bus_type;
+ drv->drv.probe = ecard_drv_probe;
+ drv->drv.remove = ecard_drv_remove;
+ drv->drv.shutdown = ecard_drv_shutdown;
+
+ return driver_register(&drv->drv);
+}
+
+void ecard_remove_driver(struct ecard_driver *drv)
+{
+ driver_unregister(&drv->drv);
+}
+
+static int ecard_match(struct device *_dev, struct device_driver *_drv)
+{
+ struct expansion_card *ec = ECARD_DEV(_dev);
+ struct ecard_driver *drv = ECARD_DRV(_drv);
+ int ret;
+
+ if (drv->id_table) {
+ ret = ecard_match_device(drv->id_table, ec) != NULL;
+ } else {
+ ret = ec->cid.id == drv->id;
+ }
+
+ return ret;
+}
+
+struct bus_type ecard_bus_type = {
+ .name = "ecard",
+ .match = ecard_match,
+};
+
+static int ecard_bus_init(void)
+{
+ return bus_register(&ecard_bus_type);
+}
+
+postcore_initcall(ecard_bus_init);
+
+EXPORT_SYMBOL(ecard_readchunk);
+EXPORT_SYMBOL(ecard_address);
+EXPORT_SYMBOL(ecard_register_driver);
+EXPORT_SYMBOL(ecard_remove_driver);
+EXPORT_SYMBOL(ecard_bus_type);
diff --git a/arch/arm26/kernel/entry.S b/arch/arm26/kernel/entry.S
new file mode 100644
index 0000000..a231dd8
--- /dev/null
+++ b/arch/arm26/kernel/entry.S
@@ -0,0 +1,961 @@
+/* arch/arm26/kernel/entry.S
+ *
+ * Assembled from chunks of code in arch/arm
+ *
+ * Copyright (C) 2003 Ian Molton
+ * Based on the work of RMK.
+ *
+ */
+
+#include <linux/linkage.h>
+
+#include <asm/assembler.h>
+#include <asm/asm_offsets.h>
+#include <asm/errno.h>
+#include <asm/hardware.h>
+#include <asm/sysirq.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+#include <asm/ptrace.h>
+
+ .macro zero_fp
+#ifndef CONFIG_NO_FRAME_POINTER
+ mov fp, #0
+#endif
+ .endm
+
+ .text
+
+@ Bad Abort numbers
+@ -----------------
+@
+#define BAD_PREFETCH 0
+#define BAD_DATA 1
+#define BAD_ADDREXCPTN 2
+#define BAD_IRQ 3
+#define BAD_UNDEFINSTR 4
+
+@ OS version number used in SWIs
+@ RISC OS is 0
+@ RISC iX is 8
+@
+#define OS_NUMBER 9
+#define ARMSWI_OFFSET 0x000f0000
+
+@
+@ Stack format (ensured by USER_* and SVC_*)
+@ PSR and PC are comined on arm26
+@
+
+#define S_OFF 8
+
+#define S_OLD_R0 64
+#define S_PC 60
+#define S_LR 56
+#define S_SP 52
+#define S_IP 48
+#define S_FP 44
+#define S_R10 40
+#define S_R9 36
+#define S_R8 32
+#define S_R7 28
+#define S_R6 24
+#define S_R5 20
+#define S_R4 16
+#define S_R3 12
+#define S_R2 8
+#define S_R1 4
+#define S_R0 0
+
+ .macro save_user_regs
+ str r0, [sp, #-4]! @ Store SVC r0
+ str lr, [sp, #-4]! @ Store user mode PC
+ sub sp, sp, #15*4
+ stmia sp, {r0 - lr}^ @ Store the other user-mode regs
+ mov r0, r0
+ .endm
+
+ .macro slow_restore_user_regs
+ ldmia sp, {r0 - lr}^ @ restore the user regs not including PC
+ mov r0, r0
+ ldr lr, [sp, #15*4] @ get user PC
+ add sp, sp, #15*4+8 @ free stack
+ movs pc, lr @ return
+ .endm
+
+ .macro fast_restore_user_regs
+ add sp, sp, #S_OFF
+ ldmib sp, {r1 - lr}^
+ mov r0, r0
+ ldr lr, [sp, #15*4]
+ add sp, sp, #15*4+8
+ movs pc, lr
+ .endm
+
+ .macro save_svc_regs
+ str sp, [sp, #-16]!
+ str lr, [sp, #8]
+ str lr, [sp, #4]
+ stmfd sp!, {r0 - r12}
+ mov r0, #-1
+ str r0, [sp, #S_OLD_R0]
+ zero_fp
+ .endm
+
+ .macro save_svc_regs_irq
+ str sp, [sp, #-16]!
+ str lr, [sp, #4]
+ ldr lr, .LCirq
+ ldr lr, [lr]
+ str lr, [sp, #8]
+ stmfd sp!, {r0 - r12}
+ mov r0, #-1
+ str r0, [sp, #S_OLD_R0]
+ zero_fp
+ .endm
+
+ .macro restore_svc_regs
+ ldmfd sp, {r0 - pc}^
+ .endm
+
+ .macro mask_pc, rd, rm
+ bic \rd, \rm, #PCMASK
+ .endm
+
+ .macro disable_irqs, temp
+ mov \temp, pc
+ orr \temp, \temp, #PSR_I_BIT
+ teqp \temp, #0
+ .endm
+
+ .macro enable_irqs, temp
+ mov \temp, pc
+ and \temp, \temp, #~PSR_I_BIT
+ teqp \temp, #0
+ .endm
+
+ .macro initialise_traps_extra
+ .endm
+
+ .macro get_thread_info, rd
+ mov \rd, sp, lsr #13
+ mov \rd, \rd, lsl #13
+ .endm
+
+/*
+ * These are the registers used in the syscall handler, and allow us to
+ * have in theory up to 7 arguments to a function - r0 to r6.
+ *
+ * Note that tbl == why is intentional.
+ *
+ * We must set at least "tsk" and "why" when calling ret_with_reschedule.
+ */
+scno .req r7 @ syscall number
+tbl .req r8 @ syscall table pointer
+why .req r8 @ Linux syscall (!= 0)
+tsk .req r9 @ current thread_info
+
+/*
+ * Get the system call number.
+ */
+ .macro get_scno
+ mask_pc lr, lr
+ ldr scno, [lr, #-4] @ get SWI instruction
+ .endm
+/*
+ * -----------------------------------------------------------------------
+ */
+
+/*
+ * We rely on the fact that R0 is at the bottom of the stack (due to
+ * slow/fast restore user regs).
+ */
+#if S_R0 != 0
+#error "Please fix"
+#endif
+
+/*
+ * This is the fast syscall return path. We do as little as
+ * possible here, and this includes saving r0 back into the SVC
+ * stack.
+ */
+ret_fast_syscall:
+ disable_irqs r1 @ disable interrupts
+ ldr r1, [tsk, #TI_FLAGS]
+ tst r1, #_TIF_WORK_MASK
+ bne fast_work_pending
+ fast_restore_user_regs
+
+/*
+ * Ok, we need to do extra processing, enter the slow path.
+ */
+fast_work_pending:
+ str r0, [sp, #S_R0+S_OFF]! @ returned r0
+work_pending:
+ tst r1, #_TIF_NEED_RESCHED
+ bne work_resched
+ tst r1, #_TIF_NOTIFY_RESUME | _TIF_SIGPENDING
+ beq no_work_pending
+ mov r0, sp @ 'regs'
+ mov r2, why @ 'syscall'
+ bl do_notify_resume
+ disable_irqs r1 @ disable interrupts
+ b no_work_pending
+
+work_resched:
+ bl schedule
+/*
+ * "slow" syscall return path. "why" tells us if this was a real syscall.
+ */
+ENTRY(ret_to_user)
+ret_slow_syscall:
+ disable_irqs r1 @ disable interrupts
+ ldr r1, [tsk, #TI_FLAGS]
+ tst r1, #_TIF_WORK_MASK
+ bne work_pending
+no_work_pending:
+ slow_restore_user_regs
+
+/*
+ * This is how we return from a fork.
+ */
+ENTRY(ret_from_fork)
+ bl schedule_tail
+ get_thread_info tsk
+ ldr r1, [tsk, #TI_FLAGS] @ check for syscall tracing
+ mov why, #1
+ tst r1, #_TIF_SYSCALL_TRACE @ are we tracing syscalls?
+ beq ret_slow_syscall
+ mov r1, sp
+ mov r0, #1 @ trace exit [IP = 1]
+ bl syscall_trace
+ b ret_slow_syscall
+
+// FIXME - is this strictly necessary?
+#include "calls.S"
+
+/*=============================================================================
+ * SWI handler
+ *-----------------------------------------------------------------------------
+ */
+
+ .align 5
+ENTRY(vector_swi)
+ save_user_regs
+ zero_fp
+ get_scno
+
+#ifdef CONFIG_ALIGNMENT_TRAP
+ ldr ip, __cr_alignment
+ ldr ip, [ip]
+ mcr p15, 0, ip, c1, c0 @ update control register
+#endif
+ enable_irqs ip
+
+ str r4, [sp, #-S_OFF]! @ push fifth arg
+
+ get_thread_info tsk
+ ldr ip, [tsk, #TI_FLAGS] @ check for syscall tracing
+ bic scno, scno, #0xff000000 @ mask off SWI op-code
+ eor scno, scno, #OS_NUMBER << 20 @ check OS number
+ adr tbl, sys_call_table @ load syscall table pointer
+ tst ip, #_TIF_SYSCALL_TRACE @ are we tracing syscalls?
+ bne __sys_trace
+
+ adral lr, ret_fast_syscall @ set return address
+ orral lr, lr, #PSR_I_BIT | MODE_SVC26 @ Force SVC mode on return
+ cmp scno, #NR_syscalls @ check upper syscall limit
+ ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine
+
+ add r1, sp, #S_OFF
+2: mov why, #0 @ no longer a real syscall
+ cmp scno, #ARMSWI_OFFSET
+ eor r0, scno, #OS_NUMBER << 20 @ put OS number back
+ bcs arm_syscall
+ b sys_ni_syscall @ not private func
+
+ /*
+ * This is the really slow path. We're going to be doing
+ * context switches, and waiting for our parent to respond.
+ */
+__sys_trace:
+ add r1, sp, #S_OFF
+ mov r0, #0 @ trace entry [IP = 0]
+ bl syscall_trace
+
+ adral lr, __sys_trace_return @ set return address
+ orral lr, lr, #PSR_I_BIT | MODE_SVC26 @ Force SVC mode on return
+ add r1, sp, #S_R0 + S_OFF @ pointer to regs
+ cmp scno, #NR_syscalls @ check upper syscall limit
+ ldmccia r1, {r0 - r3} @ have to reload r0 - r3
+ ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine
+ b 2b
+
+__sys_trace_return:
+ str r0, [sp, #S_R0 + S_OFF]! @ save returned r0
+ mov r1, sp
+ mov r0, #1 @ trace exit [IP = 1]
+ bl syscall_trace
+ b ret_slow_syscall
+
+ .align 5
+#ifdef CONFIG_ALIGNMENT_TRAP
+ .type __cr_alignment, #object
+__cr_alignment:
+ .word cr_alignment
+#endif
+
+ .type sys_call_table, #object
+ENTRY(sys_call_table)
+#include "calls.S"
+
+/*============================================================================
+ * Special system call wrappers
+ */
+@ r0 = syscall number
+@ r5 = syscall table
+ .type sys_syscall, #function
+sys_syscall:
+ eor scno, r0, #OS_NUMBER << 20
+ cmp scno, #NR_syscalls @ check range
+ stmleia sp, {r5, r6} @ shuffle args
+ movle r0, r1
+ movle r1, r2
+ movle r2, r3
+ movle r3, r4
+ ldrle pc, [tbl, scno, lsl #2]
+ b sys_ni_syscall
+
+sys_fork_wrapper:
+ add r0, sp, #S_OFF
+ b sys_fork
+
+sys_vfork_wrapper:
+ add r0, sp, #S_OFF
+ b sys_vfork
+
+sys_execve_wrapper:
+ add r3, sp, #S_OFF
+ b sys_execve
+
+sys_clone_wapper:
+ add r2, sp, #S_OFF
+ b sys_clone
+
+sys_sigsuspend_wrapper:
+ add r3, sp, #S_OFF
+ b sys_sigsuspend
+
+sys_rt_sigsuspend_wrapper:
+ add r2, sp, #S_OFF
+ b sys_rt_sigsuspend
+
+sys_sigreturn_wrapper:
+ add r0, sp, #S_OFF
+ b sys_sigreturn
+
+sys_rt_sigreturn_wrapper:
+ add r0, sp, #S_OFF
+ b sys_rt_sigreturn
+
+sys_sigaltstack_wrapper:
+ ldr r2, [sp, #S_OFF + S_SP]
+ b do_sigaltstack
+
+/*
+ * Note: off_4k (r5) is always units of 4K. If we can't do the requested
+ * offset, we return EINVAL. FIXME - this lost some stuff from arm32 to
+ * ifdefs. check it out.
+ */
+sys_mmap2:
+ tst r5, #((1 << (PAGE_SHIFT - 12)) - 1)
+ moveq r5, r5, lsr #PAGE_SHIFT - 12
+ streq r5, [sp, #4]
+ beq do_mmap2
+ mov r0, #-EINVAL
+ RETINSTR(mov,pc, lr)
+
+/*
+ * Design issues:
+ * - We have several modes that each vector can be called from,
+ * each with its own set of registers. On entry to any vector,
+ * we *must* save the registers used in *that* mode.
+ *
+ * - This code must be as fast as possible.
+ *
+ * There are a few restrictions on the vectors:
+ * - the SWI vector cannot be called from *any* non-user mode
+ *
+ * - the FP emulator is *never* called from *any* non-user mode undefined
+ * instruction.
+ *
+ */
+
+ .text
+
+ .macro handle_irq
+1: mov r4, #IOC_BASE
+ ldrb r6, [r4, #0x24] @ get high priority first
+ adr r5, irq_prio_h
+ teq r6, #0
+ ldreqb r6, [r4, #0x14] @ get low priority
+ adreq r5, irq_prio_l
+
+ teq r6, #0 @ If an IRQ happened...
+ ldrneb r0, [r5, r6] @ get IRQ number
+ movne r1, sp @ get struct pt_regs
+ adrne lr, 1b @ Set return address to 1b
+ orrne lr, lr, #PSR_I_BIT | MODE_SVC26 @ (and force SVC mode)
+ bne asm_do_IRQ @ process IRQ (if asserted)
+ .endm
+
+
+/*
+ * Interrupt table (incorporates priority)
+ */
+ .macro irq_prio_table
+irq_prio_l: .byte 0, 0, 1, 0, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3
+ .byte 4, 0, 1, 0, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3
+ .byte 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
+ .byte 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
+ .byte 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3
+ .byte 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3
+ .byte 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
+ .byte 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
+ .byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
+ .byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
+ .byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
+ .byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
+ .byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
+ .byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
+ .byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
+ .byte 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
+irq_prio_h: .byte 0, 8, 9, 8,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 12, 8, 9, 8,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 14,14,14,14,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 14,14,14,14,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 15,15,15,15,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 15,15,15,15,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 15,15,15,15,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 15,15,15,15,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
+ .byte 13,13,13,13,10,10,10,10,11,11,11,11,10,10,10,10
+ .endm
+
+#if 1
+/*
+ * Uncomment these if you wish to get more debugging into about data aborts.
+ * FIXME - I bet we can find a way to encode these and keep performance.
+ */
+#define FAULT_CODE_LDRSTRPOST 0x80
+#define FAULT_CODE_LDRSTRPRE 0x40
+#define FAULT_CODE_LDRSTRREG 0x20
+#define FAULT_CODE_LDMSTM 0x10
+#define FAULT_CODE_LDCSTC 0x08
+#endif
+#define FAULT_CODE_PREFETCH 0x04
+#define FAULT_CODE_WRITE 0x02
+#define FAULT_CODE_FORCECOW 0x01
+
+/*=============================================================================
+ * Undefined FIQs
+ *-----------------------------------------------------------------------------
+ */
+_unexp_fiq: ldr sp, .LCfiq
+ mov r12, #IOC_BASE
+ strb r12, [r12, #0x38] @ Disable FIQ register
+ teqp pc, #PSR_I_BIT | PSR_F_BIT | MODE_SVC26
+ mov r0, r0
+ stmfd sp!, {r0 - r3, ip, lr}
+ adr r0, Lfiqmsg
+ bl printk
+ ldmfd sp!, {r0 - r3, ip, lr}
+ teqp pc, #PSR_I_BIT | PSR_F_BIT | MODE_FIQ26
+ mov r0, r0
+ movs pc, lr
+
+Lfiqmsg: .ascii "*** Unexpected FIQ\n\0"
+ .align
+
+.LCfiq: .word __temp_fiq
+.LCirq: .word __temp_irq
+
+/*=============================================================================
+ * Undefined instruction handler
+ *-----------------------------------------------------------------------------
+ * Handles floating point instructions
+ */
+vector_undefinstr:
+ tst lr, #MODE_SVC26 @ did we come from a non-user mode?
+ bne __und_svc @ yes - deal with it.
+/* Otherwise, fall through for the user-space (common) case. */
+ save_user_regs
+ zero_fp @ zero frame pointer
+ teqp pc, #PSR_I_BIT | MODE_SVC26 @ disable IRQs
+.Lbug_undef:
+ ldr r4, .LC2
+ ldr pc, [r4] @ Call FP module entry point
+/* FIXME - should we trap for a null pointer here? */
+
+/* The SVC mode case */
+__und_svc: save_svc_regs @ Non-user mode
+ mask_pc r0, lr
+ and r2, lr, #3
+ sub r0, r0, #4
+ mov r1, sp
+ bl do_undefinstr
+ restore_svc_regs
+
+/* We get here if the FP emulator doesnt handle the undef instr.
+ * If the insn WAS handled, the emulator jumps to ret_from_exception by itself/
+ */
+ .globl fpundefinstr
+fpundefinstr:
+ mov r0, lr
+ mov r1, sp
+ teqp pc, #MODE_SVC26
+ bl do_undefinstr
+ b ret_from_exception @ Normal FP exit
+
+#if defined CONFIG_FPE_NWFPE || defined CONFIG_FPE_FASTFPE
+ /* The FPE is always present */
+ .equ fpe_not_present, 0
+#else
+/* We get here if an undefined instruction happens and the floating
+ * point emulator is not present. If the offending instruction was
+ * a WFS, we just perform a normal return as if we had emulated the
+ * operation. This is a hack to allow some basic userland binaries
+ * to run so that the emulator module proper can be loaded. --philb
+ * FIXME - probably a broken useless hack...
+ */
+fpe_not_present:
+ adr r10, wfs_mask_data
+ ldmia r10, {r4, r5, r6, r7, r8}
+ ldr r10, [sp, #S_PC] @ Load PC
+ sub r10, r10, #4
+ mask_pc r10, r10
+ ldrt r10, [r10] @ get instruction
+ and r5, r10, r5
+ teq r5, r4 @ Is it WFS?
+ beq ret_from_exception
+ and r5, r10, r8
+ teq r5, r6 @ Is it LDF/STF on sp or fp?
+ teqne r5, r7
+ bne fpundefinstr
+ tst r10, #0x00200000 @ Does it have WB
+ beq ret_from_exception
+ and r4, r10, #255 @ get offset
+ and r6, r10, #0x000f0000
+ tst r10, #0x00800000 @ +/-
+ ldr r5, [sp, r6, lsr #14] @ Load reg
+ rsbeq r4, r4, #0
+ add r5, r5, r4, lsl #2
+ str r5, [sp, r6, lsr #14] @ Save reg
+ b ret_from_exception
+
+wfs_mask_data: .word 0x0e200110 @ WFS/RFS
+ .word 0x0fef0fff
+ .word 0x0d0d0100 @ LDF [sp]/STF [sp]
+ .word 0x0d0b0100 @ LDF [fp]/STF [fp]
+ .word 0x0f0f0f00
+#endif
+
+.LC2: .word fp_enter
+
+/*=============================================================================
+ * Prefetch abort handler
+ *-----------------------------------------------------------------------------
+ */
+#define DEBUG_UNDEF
+/* remember: lr = USR pc */
+vector_prefetch:
+ sub lr, lr, #4
+ tst lr, #MODE_SVC26
+ bne __pabt_invalid
+ save_user_regs
+ teqp pc, #MODE_SVC26 @ Enable IRQs...
+ mask_pc r0, lr @ Address of abort
+ mov r1, sp @ Tasks registers
+ bl do_PrefetchAbort
+ teq r0, #0 @ If non-zero, we believe this abort..
+ bne ret_from_exception
+#ifdef DEBUG_UNDEF
+ adr r0, t
+ bl printk
+#endif
+ ldr lr, [sp,#S_PC] @ FIXME program to test this on. I think its
+ b .Lbug_undef @ broken at the moment though!)
+
+__pabt_invalid: save_svc_regs
+ mov r0, sp @ Prefetch aborts are definitely *not*
+ mov r1, #BAD_PREFETCH @ allowed in non-user modes. We cant
+ and r2, lr, #3 @ recover from this problem.
+ b bad_mode
+
+#ifdef DEBUG_UNDEF
+t: .ascii "*** undef ***\r\n\0"
+ .align
+#endif
+
+/*=============================================================================
+ * Address exception handler
+ *-----------------------------------------------------------------------------
+ * These aren't too critical.
+ * (they're not supposed to happen).
+ * In order to debug the reason for address exceptions in non-user modes,
+ * we have to obtain all the registers so that we can see what's going on.
+ */
+
+vector_addrexcptn:
+ sub lr, lr, #8
+ tst lr, #3
+ bne Laddrexcptn_not_user
+ save_user_regs
+ teq pc, #MODE_SVC26
+ mask_pc r0, lr @ Point to instruction
+ mov r1, sp @ Point to registers
+ mov r2, #0x400
+ mov lr, pc
+ bl do_excpt
+ b ret_from_exception
+
+Laddrexcptn_not_user:
+ save_svc_regs
+ and r2, lr, #3
+ teq r2, #3
+ bne Laddrexcptn_illegal_mode
+ teqp pc, #MODE_SVC26
+ mask_pc r0, lr
+ mov r1, sp
+ orr r2, r2, #0x400
+ bl do_excpt
+ ldmia sp, {r0 - lr} @ I cant remember the reason I changed this...
+ add sp, sp, #15*4
+ movs pc, lr
+
+Laddrexcptn_illegal_mode:
+ mov r0, sp
+ str lr, [sp, #-4]!
+ orr r1, r2, #PSR_I_BIT | PSR_F_BIT
+ teqp r1, #0 @ change into mode (wont be user mode)
+ mov r0, r0
+ mov r1, r8 @ Any register from r8 - r14 can be banked
+ mov r2, r9
+ mov r3, r10
+ mov r4, r11
+ mov r5, r12
+ mov r6, r13
+ mov r7, r14
+ teqp pc, #PSR_F_BIT | MODE_SVC26 @ back to svc
+ mov r0, r0
+ stmfd sp!, {r1-r7}
+ ldmia r0, {r0-r7}
+ stmfd sp!, {r0-r7}
+ mov r0, sp
+ mov r1, #BAD_ADDREXCPTN
+ b bad_mode
+
+/*=============================================================================
+ * Interrupt (IRQ) handler
+ *-----------------------------------------------------------------------------
+ * Note: if the IRQ was taken whilst in user mode, then *no* kernel routine
+ * is running, so do not have to save svc lr.
+ *
+ * Entered in IRQ mode.
+ */
+
+vector_IRQ: ldr sp, .LCirq @ Setup some temporary stack
+ sub lr, lr, #4
+ str lr, [sp] @ push return address
+
+ tst lr, #3
+ bne __irq_non_usr
+
+__irq_usr: teqp pc, #PSR_I_BIT | MODE_SVC26 @ Enter SVC mode
+ mov r0, r0
+
+ ldr lr, .LCirq
+ ldr lr, [lr] @ Restore lr for jump back to USR
+
+ save_user_regs
+
+ handle_irq
+
+ mov why, #0
+ get_thread_info tsk
+ b ret_to_user
+
+@ Place the IRQ priority table here so that the handle_irq macros above
+@ and below here can access it.
+
+ irq_prio_table
+
+__irq_non_usr: teqp pc, #PSR_I_BIT | MODE_SVC26 @ Enter SVC mode
+ mov r0, r0
+
+ save_svc_regs_irq
+
+ and r2, lr, #3
+ teq r2, #3
+ bne __irq_invalid @ IRQ not from SVC mode
+
+ handle_irq
+
+ restore_svc_regs
+
+__irq_invalid: mov r0, sp
+ mov r1, #BAD_IRQ
+ b bad_mode
+
+/*=============================================================================
+ * Data abort handler code
+ *-----------------------------------------------------------------------------
+ *
+ * This handles both exceptions from user and SVC modes, computes the address
+ * range of the problem, and does any correction that is required. It then
+ * calls the kernel data abort routine.
+ *
+ * This is where I wish that the ARM would tell you which address aborted.
+ */
+
+vector_data: sub lr, lr, #8 @ Correct lr
+ tst lr, #3
+ bne Ldata_not_user
+ save_user_regs
+ teqp pc, #MODE_SVC26
+ mask_pc r0, lr
+ bl Ldata_do
+ b ret_from_exception
+
+Ldata_not_user:
+ save_svc_regs
+ and r2, lr, #3
+ teq r2, #3
+ bne Ldata_illegal_mode
+ tst lr, #PSR_I_BIT
+ teqeqp pc, #MODE_SVC26
+ mask_pc r0, lr
+ bl Ldata_do
+ restore_svc_regs
+
+Ldata_illegal_mode:
+ mov r0, sp
+ mov r1, #BAD_DATA
+ b bad_mode
+
+Ldata_do: mov r3, sp
+ ldr r4, [r0] @ Get instruction
+ mov r2, #0
+ tst r4, #1 << 20 @ Check to see if it is a write instruction
+ orreq r2, r2, #FAULT_CODE_WRITE @ Indicate write instruction
+ mov r1, r4, lsr #22 @ Now branch to the relevent processing routine
+ and r1, r1, #15 << 2
+ add pc, pc, r1
+ movs pc, lr
+ b Ldata_unknown
+ b Ldata_unknown
+ b Ldata_unknown
+ b Ldata_unknown
+ b Ldata_ldrstr_post @ ldr rd, [rn], #m
+ b Ldata_ldrstr_numindex @ ldr rd, [rn, #m] @ RegVal
+ b Ldata_ldrstr_post @ ldr rd, [rn], rm
+ b Ldata_ldrstr_regindex @ ldr rd, [rn, rm]
+ b Ldata_ldmstm @ ldm*a rn, <rlist>
+ b Ldata_ldmstm @ ldm*b rn, <rlist>
+ b Ldata_unknown
+ b Ldata_unknown
+ b Ldata_ldrstr_post @ ldc rd, [rn], #m @ Same as ldr rd, [rn], #m
+ b Ldata_ldcstc_pre @ ldc rd, [rn, #m]
+ b Ldata_unknown
+Ldata_unknown: @ Part of jumptable
+ mov r0, r1
+ mov r1, r4
+ mov r2, r3
+ b baddataabort
+
+Ldata_ldrstr_post:
+ mov r0, r4, lsr #14 @ Get Rn
+ and r0, r0, #15 << 2 @ Mask out reg.
+ teq r0, #15 << 2
+ ldr r0, [r3, r0] @ Get register
+ biceq r0, r0, #PCMASK
+ mov r1, r0
+#ifdef FAULT_CODE_LDRSTRPOST
+ orr r2, r2, #FAULT_CODE_LDRSTRPOST
+#endif
+ b do_DataAbort
+
+Ldata_ldrstr_numindex:
+ mov r0, r4, lsr #14 @ Get Rn
+ and r0, r0, #15 << 2 @ Mask out reg.
+ teq r0, #15 << 2
+ ldr r0, [r3, r0] @ Get register
+ mov r1, r4, lsl #20
+ biceq r0, r0, #PCMASK
+ tst r4, #1 << 23
+ addne r0, r0, r1, lsr #20
+ subeq r0, r0, r1, lsr #20
+ mov r1, r0
+#ifdef FAULT_CODE_LDRSTRPRE
+ orr r2, r2, #FAULT_CODE_LDRSTRPRE
+#endif
+ b do_DataAbort
+
+Ldata_ldrstr_regindex:
+ mov r0, r4, lsr #14 @ Get Rn
+ and r0, r0, #15 << 2 @ Mask out reg.
+ teq r0, #15 << 2
+ ldr r0, [r3, r0] @ Get register
+ and r7, r4, #15
+ biceq r0, r0, #PCMASK
+ teq r7, #15 @ Check for PC
+ ldr r7, [r3, r7, lsl #2] @ Get Rm
+ and r8, r4, #0x60 @ Get shift types
+ biceq r7, r7, #PCMASK
+ mov r9, r4, lsr #7 @ Get shift amount
+ and r9, r9, #31
+ teq r8, #0
+ moveq r7, r7, lsl r9
+ teq r8, #0x20 @ LSR shift
+ moveq r7, r7, lsr r9
+ teq r8, #0x40 @ ASR shift
+ moveq r7, r7, asr r9
+ teq r8, #0x60 @ ROR shift
+ moveq r7, r7, ror r9
+ tst r4, #1 << 23
+ addne r0, r0, r7
+ subeq r0, r0, r7 @ Apply correction
+ mov r1, r0
+#ifdef FAULT_CODE_LDRSTRREG
+ orr r2, r2, #FAULT_CODE_LDRSTRREG
+#endif
+ b do_DataAbort
+
+Ldata_ldmstm:
+ mov r7, #0x11
+ orr r7, r7, r7, lsl #8
+ and r0, r4, r7
+ and r1, r4, r7, lsl #1
+ add r0, r0, r1, lsr #1
+ and r1, r4, r7, lsl #2
+ add r0, r0, r1, lsr #2
+ and r1, r4, r7, lsl #3
+ add r0, r0, r1, lsr #3
+ add r0, r0, r0, lsr #8
+ add r0, r0, r0, lsr #4
+ and r7, r0, #15 @ r7 = no. of registers to transfer.
+ mov r5, r4, lsr #14 @ Get Rn
+ and r5, r5, #15 << 2
+ ldr r0, [r3, r5] @ Get reg
+ eor r6, r4, r4, lsl #2
+ tst r6, #1 << 23 @ Check inc/dec ^ writeback
+ rsbeq r7, r7, #0
+ add r7, r0, r7, lsl #2 @ Do correction (signed)
+ subne r1, r7, #1
+ subeq r1, r0, #1
+ moveq r0, r7
+ tst r4, #1 << 21 @ Check writeback
+ strne r7, [r3, r5]
+ eor r6, r4, r4, lsl #1
+ tst r6, #1 << 24 @ Check Pre/Post ^ inc/dec
+ addeq r0, r0, #4
+ addeq r1, r1, #4
+ teq r5, #15*4 @ CHECK FOR PC
+ biceq r1, r1, #PCMASK
+ biceq r0, r0, #PCMASK
+#ifdef FAULT_CODE_LDMSTM
+ orr r2, r2, #FAULT_CODE_LDMSTM
+#endif
+ b do_DataAbort
+
+Ldata_ldcstc_pre:
+ mov r0, r4, lsr #14 @ Get Rn
+ and r0, r0, #15 << 2 @ Mask out reg.
+ teq r0, #15 << 2
+ ldr r0, [r3, r0] @ Get register
+ mov r1, r4, lsl #24 @ Get offset
+ biceq r0, r0, #PCMASK
+ tst r4, #1 << 23
+ addne r0, r0, r1, lsr #24
+ subeq r0, r0, r1, lsr #24
+ mov r1, r0
+#ifdef FAULT_CODE_LDCSTC
+ orr r2, r2, #FAULT_CODE_LDCSTC
+#endif
+ b do_DataAbort
+
+
+/*
+ * This is the return code to user mode for abort handlers
+ */
+ENTRY(ret_from_exception)
+ get_thread_info tsk
+ mov why, #0
+ b ret_to_user
+
+ .data
+ENTRY(fp_enter)
+ .word fpe_not_present
+ .text
+/*
+ * Register switch for older 26-bit only ARMs
+ */
+ENTRY(__switch_to)
+ add r0, r0, #TI_CPU_SAVE
+ stmia r0, {r4 - sl, fp, sp, lr}
+ add r1, r1, #TI_CPU_SAVE
+ ldmia r1, {r4 - sl, fp, sp, pc}^
+
+/*
+ *=============================================================================
+ * Low-level interface code
+ *-----------------------------------------------------------------------------
+ * Trap initialisation
+ *-----------------------------------------------------------------------------
+ *
+ * Note - FIQ code has changed. The default is a couple of words in 0x1c, 0x20
+ * that call _unexp_fiq. Nowever, we now copy the FIQ routine to 0x1c (removes
+ * some excess cycles).
+ *
+ * What we need to put into 0-0x1c are branches to branch to the kernel.
+ */
+
+ .section ".init.text",#alloc,#execinstr
+
+.Ljump_addresses:
+ swi SYS_ERROR0
+ .word vector_undefinstr - 12
+ .word vector_swi - 16
+ .word vector_prefetch - 20
+ .word vector_data - 24
+ .word vector_addrexcptn - 28
+ .word vector_IRQ - 32
+ .word _unexp_fiq - 36
+ b . + 8
+/*
+ * initialise the trap system
+ */
+ENTRY(__trap_init)
+ stmfd sp!, {r4 - r7, lr}
+ adr r1, .Ljump_addresses
+ ldmia r1, {r1 - r7, ip, lr}
+ orr r2, lr, r2, lsr #2
+ orr r3, lr, r3, lsr #2
+ orr r4, lr, r4, lsr #2
+ orr r5, lr, r5, lsr #2
+ orr r6, lr, r6, lsr #2
+ orr r7, lr, r7, lsr #2
+ orr ip, lr, ip, lsr #2
+ mov r0, #0
+ stmia r0, {r1 - r7, ip}
+ ldmfd sp!, {r4 - r7, pc}^
+
+ .bss
+__temp_irq: .space 4 @ saved lr_irq
+__temp_fiq: .space 128
diff --git a/arch/arm26/kernel/fiq.c b/arch/arm26/kernel/fiq.c
new file mode 100644
index 0000000..08a97c9
--- /dev/null
+++ b/arch/arm26/kernel/fiq.c
@@ -0,0 +1,202 @@
+/*
+ * linux/arch/arm26/kernel/fiq.c
+ *
+ * Copyright (C) 1998 Russell King
+ * Copyright (C) 1998, 1999 Phil Blundell
+ * Copyright (C) 2003 Ian Molton
+ *
+ * FIQ support written by Philip Blundell <philb@gnu.org>, 1998.
+ *
+ * FIQ support re-written by Russell King to be more generic
+ *
+ * We now properly support a method by which the FIQ handlers can
+ * be stacked onto the vector. We still do not support sharing
+ * the FIQ vector itself.
+ *
+ * Operation is as follows:
+ * 1. Owner A claims FIQ:
+ * - default_fiq relinquishes control.
+ * 2. Owner A:
+ * - inserts code.
+ * - sets any registers,
+ * - enables FIQ.
+ * 3. Owner B claims FIQ:
+ * - if owner A has a relinquish function.
+ * - disable FIQs.
+ * - saves any registers.
+ * - returns zero.
+ * 4. Owner B:
+ * - inserts code.
+ * - sets any registers,
+ * - enables FIQ.
+ * 5. Owner B releases FIQ:
+ * - Owner A is asked to reacquire FIQ:
+ * - inserts code.
+ * - restores saved registers.
+ * - enables FIQ.
+ * 6. Goto 3
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+
+#include <asm/fiq.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/pgalloc.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#define FIQ_VECTOR (vectors_base() + 0x1c)
+
+static unsigned long no_fiq_insn;
+
+#define unprotect_page_0()
+#define protect_page_0()
+
+/* Default reacquire function
+ * - we always relinquish FIQ control
+ * - we always reacquire FIQ control
+ */
+static int fiq_def_op(void *ref, int relinquish)
+{
+ if (!relinquish) {
+ unprotect_page_0();
+ *(unsigned long *)FIQ_VECTOR = no_fiq_insn;
+ protect_page_0();
+ }
+
+ return 0;
+}
+
+static struct fiq_handler default_owner = {
+ .name = "default",
+ .fiq_op = fiq_def_op,
+};
+
+static struct fiq_handler *current_fiq = &default_owner;
+
+int show_fiq_list(struct seq_file *p, void *v)
+{
+ if (current_fiq != &default_owner)
+ seq_printf(p, "FIQ: %s\n", current_fiq->name);
+
+ return 0;
+}
+
+void set_fiq_handler(void *start, unsigned int length)
+{
+ unprotect_page_0();
+
+ memcpy((void *)FIQ_VECTOR, start, length);
+
+ protect_page_0();
+}
+
+/*
+ * Taking an interrupt in FIQ mode is death, so both these functions
+ * disable irqs for the duration.
+ */
+void set_fiq_regs(struct pt_regs *regs)
+{
+ register unsigned long tmp, tmp2;
+ __asm__ volatile (
+ "mov %0, pc
+ bic %1, %0, #0x3
+ orr %1, %1, %3
+ teqp %1, #0 @ select FIQ mode
+ mov r0, r0
+ ldmia %2, {r8 - r14}
+ teqp %0, #0 @ return to SVC mode
+ mov r0, r0"
+ : "=&r" (tmp), "=&r" (tmp2)
+ : "r" (&regs->ARM_r8), "I" (PSR_I_BIT | PSR_F_BIT | MODE_FIQ26)
+ /* These registers aren't modified by the above code in a way
+ visible to the compiler, but we mark them as clobbers anyway
+ so that GCC won't put any of the input or output operands in
+ them. */
+ : "r8", "r9", "r10", "r11", "r12", "r13", "r14");
+}
+
+void get_fiq_regs(struct pt_regs *regs)
+{
+ register unsigned long tmp, tmp2;
+ __asm__ volatile (
+ "mov %0, pc
+ bic %1, %0, #0x3
+ orr %1, %1, %3
+ teqp %1, #0 @ select FIQ mode
+ mov r0, r0
+ stmia %2, {r8 - r14}
+ teqp %0, #0 @ return to SVC mode
+ mov r0, r0"
+ : "=&r" (tmp), "=&r" (tmp2)
+ : "r" (&regs->ARM_r8), "I" (PSR_I_BIT | PSR_F_BIT | MODE_FIQ26)
+ /* These registers aren't modified by the above code in a way
+ visible to the compiler, but we mark them as clobbers anyway
+ so that GCC won't put any of the input or output operands in
+ them. */
+ : "r8", "r9", "r10", "r11", "r12", "r13", "r14");
+}
+
+int claim_fiq(struct fiq_handler *f)
+{
+ int ret = 0;
+
+ if (current_fiq) {
+ ret = -EBUSY;
+
+ if (current_fiq->fiq_op != NULL)
+ ret = current_fiq->fiq_op(current_fiq->dev_id, 1);
+ }
+
+ if (!ret) {
+ f->next = current_fiq;
+ current_fiq = f;
+ }
+
+ return ret;
+}
+
+void release_fiq(struct fiq_handler *f)
+{
+ if (current_fiq != f) {
+ printk(KERN_ERR "%s FIQ trying to release %s FIQ\n",
+ f->name, current_fiq->name);
+#ifdef CONFIG_DEBUG_ERRORS
+ __backtrace();
+#endif
+ return;
+ }
+
+ do
+ current_fiq = current_fiq->next;
+ while (current_fiq->fiq_op(current_fiq->dev_id, 0));
+}
+
+void enable_fiq(int fiq)
+{
+ enable_irq(fiq + FIQ_START);
+}
+
+void disable_fiq(int fiq)
+{
+ disable_irq(fiq + FIQ_START);
+}
+
+EXPORT_SYMBOL(set_fiq_handler);
+EXPORT_SYMBOL(set_fiq_regs);
+EXPORT_SYMBOL(get_fiq_regs);
+EXPORT_SYMBOL(claim_fiq);
+EXPORT_SYMBOL(release_fiq);
+EXPORT_SYMBOL(enable_fiq);
+EXPORT_SYMBOL(disable_fiq);
+
+void __init init_FIQ(void)
+{
+ no_fiq_insn = *(unsigned long *)FIQ_VECTOR;
+ set_fs(get_fs());
+}
diff --git a/arch/arm26/kernel/head.S b/arch/arm26/kernel/head.S
new file mode 100644
index 0000000..8bfc625
--- /dev/null
+++ b/arch/arm26/kernel/head.S
@@ -0,0 +1,113 @@
+/*
+ * linux/arch/arm26/kernel/head.S
+ *
+ * Copyright (C) 1994-2000 Russell King
+ * Copyright (C) 2003 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 26-bit kernel startup code
+ */
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <asm/mach-types.h>
+
+ .globl swapper_pg_dir
+ .equ swapper_pg_dir, 0x0207d000
+
+/*
+ * Entry point.
+ */
+ .section ".init.text",#alloc,#execinstr
+ENTRY(stext)
+
+__entry:
+ cmp pc, #0x02000000
+ ldrlt pc, LC0 @ if 0x01800000, call at 0x02080000
+ teq r0, #0 @ Check for old calling method
+ blne oldparams @ Move page if old
+
+ adr r0, LC0
+ ldmib r0, {r2-r5, sp} @ Setup stack (and fetch other values)
+
+ mov r0, #0 @ Clear BSS
+1: cmp r2, r3
+ strcc r0, [r2], #4
+ bcc 1b
+
+ bl detect_proc_type
+ str r0, [r4]
+ bl detect_arch_type
+ str r0, [r5]
+
+#ifdef CONFIG_XIP_KERNEL
+ ldr r3, ETEXT @ data section copy
+ ldr r4, SDATA
+ ldr r5, EDATA
+1:
+ ldr r6, [r3], #4
+ str r6, [r4], #4
+ cmp r4, r5
+ blt 1b
+#endif
+ mov fp, #0
+ b start_kernel
+
+LC0: .word _stext
+ .word __bss_start @ r2
+ .word _end @ r3
+ .word processor_id @ r4
+ .word __machine_arch_type @ r5
+ .word init_thread_union+8192 @ sp
+#ifdef CONFIG_XIP_KERNEL
+ETEXT: .word _endtext
+SDATA: .word _sdata
+EDATA: .word __bss_start
+#endif
+
+arm2_id: .long 0x41560200 @ ARM2 and 250 dont have a CPUID
+arm250_id: .long 0x41560250 @ So we create some after probing for them
+ .align
+
+oldparams: mov r4, #0x02000000
+ add r3, r4, #0x00080000
+ add r4, r4, #0x0007c000
+1: ldmia r0!, {r5 - r12}
+ stmia r4!, {r5 - r12}
+ cmp r4, r3
+ blt 1b
+ mov pc, lr
+
+/*
+ * We need some way to automatically detect the difference between
+ * these two machines. Unfortunately, it is not possible to detect
+ * the presence of the SuperIO chip, because that will hang the old
+ * Archimedes machines solid.
+ */
+/* DAG: Outdated, these have been combined !!!!!!! */
+detect_arch_type:
+#if defined(CONFIG_ARCH_ARC)
+ mov r0, #MACH_TYPE_ARCHIMEDES
+#elif defined(CONFIG_ARCH_A5K)
+ mov r0, #MACH_TYPE_A5K
+#endif
+ mov pc, lr
+
+detect_proc_type:
+ mov ip, lr
+ mov r2, #0xea000000 @ Point undef instr to continuation
+ adr r0, continue - 12
+ orr r0, r2, r0, lsr #2
+ mov r1, #0
+ str r0, [r1, #4]
+ ldr r0, arm2_id
+ swp r2, r2, [r1] @ check for swp (ARM2 cant)
+ ldr r0, arm250_id
+ mrc 15, 0, r3, c0, c0 @ check for CP#15 (ARM250 cant)
+ mov r0, r3
+continue: mov r2, #0xeb000000 @ Make undef vector loop
+ sub r2, r2, #2
+ str r2, [r1, #4]
+ mov pc, ip
diff --git a/arch/arm26/kernel/init_task.c b/arch/arm26/kernel/init_task.c
new file mode 100644
index 0000000..4191565
--- /dev/null
+++ b/arch/arm26/kernel/init_task.c
@@ -0,0 +1,49 @@
+/*
+ * linux/arch/arm26/kernel/init_task.c
+ *
+ * Copyright (C) 2003 Ian Molton
+ *
+ */
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/init_task.h>
+#include <linux/mqueue.h>
+
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+
+static struct fs_struct init_fs = INIT_FS;
+static struct files_struct init_files = INIT_FILES;
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+struct mm_struct init_mm = INIT_MM(init_mm);
+
+EXPORT_SYMBOL(init_mm);
+
+/*
+ * Initial thread structure.
+ *
+ * We need to make sure that this is 8192-byte aligned due to the
+ * way process stacks are handled. This is done by making sure
+ * the linker maps this in the .text segment right after head.S,
+ * and making the linker scripts ensure the proper alignment.
+ *
+ * FIXME - should this be 32K alignment on arm26?
+ *
+ * The things we do for performance...
+ */
+union thread_union init_thread_union
+ __attribute__((__section__(".init.task"))) =
+ { INIT_THREAD_INFO(init_task) };
+
+/*
+ * Initial task structure.
+ *
+ * All other task structs will be allocated on slabs in fork.c
+ */
+struct task_struct init_task = INIT_TASK(init_task);
+
+EXPORT_SYMBOL(init_task);
diff --git a/arch/arm26/kernel/irq.c b/arch/arm26/kernel/irq.c
new file mode 100644
index 0000000..f3cc103
--- /dev/null
+++ b/arch/arm26/kernel/irq.c
@@ -0,0 +1,716 @@
+/*
+ * linux/arch/arm/kernel/irq.c
+ *
+ * Copyright (C) 1992 Linus Torvalds
+ * Modifications for ARM processor Copyright (C) 1995-2000 Russell King.
+ * 'Borrowed' for ARM26 and (C) 2003 Ian Molton.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This file contains the code used by various IRQ handling routines:
+ * asking for different IRQ's should be done through these routines
+ * instead of just grabbing them. Thus setups with different IRQ numbers
+ * shouldn't result in any weird surprises, and installing new handlers
+ * should be easier.
+ *
+ * IRQ's are in fact implemented a bit like signal handlers for the kernel.
+ * Naturally it's not a 1:1 relation, but there are similarities.
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/kernel_stat.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include <linux/smp.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+#include <linux/errno.h>
+
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/irqchip.h>
+
+//FIXME - this ought to be in a header IMO
+void __init arc_init_irq(void);
+
+/*
+ * Maximum IRQ count. Currently, this is arbitary. However, it should
+ * not be set too low to prevent false triggering. Conversely, if it
+ * is set too high, then you could miss a stuck IRQ.
+ *
+ * FIXME Maybe we ought to set a timer and re-enable the IRQ at a later time?
+ */
+#define MAX_IRQ_CNT 100000
+
+static volatile unsigned long irq_err_count;
+static DEFINE_SPINLOCK(irq_controller_lock);
+
+struct irqdesc irq_desc[NR_IRQS];
+
+/*
+ * Dummy mask/unmask handler
+ */
+void dummy_mask_unmask_irq(unsigned int irq)
+{
+}
+
+void do_bad_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
+{
+ irq_err_count += 1;
+ printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
+}
+
+static struct irqchip bad_chip = {
+ .ack = dummy_mask_unmask_irq,
+ .mask = dummy_mask_unmask_irq,
+ .unmask = dummy_mask_unmask_irq,
+};
+
+static struct irqdesc bad_irq_desc = {
+ .chip = &bad_chip,
+ .handle = do_bad_IRQ,
+ .depth = 1,
+};
+
+/**
+ * disable_irq - disable an irq and wait for completion
+ * @irq: Interrupt to disable
+ *
+ * Disable the selected interrupt line. We do this lazily.
+ *
+ * This function may be called from IRQ context.
+ */
+void disable_irq(unsigned int irq)
+{
+ struct irqdesc *desc = irq_desc + irq;
+ unsigned long flags;
+ spin_lock_irqsave(&irq_controller_lock, flags);
+ if (!desc->depth++)
+ desc->enabled = 0;
+ spin_unlock_irqrestore(&irq_controller_lock, flags);
+}
+
+/**
+ * enable_irq - enable interrupt handling on an irq
+ * @irq: Interrupt to enable
+ *
+ * Re-enables the processing of interrupts on this IRQ line.
+ * Note that this may call the interrupt handler, so you may
+ * get unexpected results if you hold IRQs disabled.
+ *
+ * This function may be called from IRQ context.
+ */
+void enable_irq(unsigned int irq)
+{
+ struct irqdesc *desc = irq_desc + irq;
+ unsigned long flags;
+ int pending = 0;
+
+ spin_lock_irqsave(&irq_controller_lock, flags);
+ if (unlikely(!desc->depth)) {
+ printk("enable_irq(%u) unbalanced from %p\n", irq,
+ __builtin_return_address(0)); //FIXME bum addresses reported - why?
+ } else if (!--desc->depth) {
+ desc->probing = 0;
+ desc->enabled = 1;
+ desc->chip->unmask(irq);
+ pending = desc->pending;
+ desc->pending = 0;
+ /*
+ * If the interrupt was waiting to be processed,
+ * retrigger it.
+ */
+ if (pending)
+ desc->chip->rerun(irq);
+ }
+ spin_unlock_irqrestore(&irq_controller_lock, flags);
+}
+
+int show_interrupts(struct seq_file *p, void *v)
+{
+ int i = *(loff_t *) v;
+ struct irqaction * action;
+
+ if (i < NR_IRQS) {
+ action = irq_desc[i].action;
+ if (!action)
+ continue;
+ seq_printf(p, "%3d: %10u ", i, kstat_irqs(i));
+ seq_printf(p, " %s", action->name);
+ for (action = action->next; action; action = action->next) {
+ seq_printf(p, ", %s", action->name);
+ }
+ seq_putc(p, '\n');
+ } else if (i == NR_IRQS) {
+ show_fiq_list(p, v);
+ seq_printf(p, "Err: %10lu\n", irq_err_count);
+ }
+ return 0;
+}
+
+/*
+ * IRQ lock detection.
+ *
+ * Hopefully, this should get us out of a few locked situations.
+ * However, it may take a while for this to happen, since we need
+ * a large number if IRQs to appear in the same jiffie with the
+ * same instruction pointer (or within 2 instructions).
+ */
+static int check_irq_lock(struct irqdesc *desc, int irq, struct pt_regs *regs)
+{
+ unsigned long instr_ptr = instruction_pointer(regs);
+
+ if (desc->lck_jif == jiffies &&
+ desc->lck_pc >= instr_ptr && desc->lck_pc < instr_ptr + 8) {
+ desc->lck_cnt += 1;
+
+ if (desc->lck_cnt > MAX_IRQ_CNT) {
+ printk(KERN_ERR "IRQ LOCK: IRQ%d is locking the system, disabled\n", irq);
+ return 1;
+ }
+ } else {
+ desc->lck_cnt = 0;
+ desc->lck_pc = instruction_pointer(regs);
+ desc->lck_jif = jiffies;
+ }
+ return 0;
+}
+
+static void
+__do_irq(unsigned int irq, struct irqaction *action, struct pt_regs *regs)
+{
+ unsigned int status;
+ int ret;
+
+ spin_unlock(&irq_controller_lock);
+ if (!(action->flags & SA_INTERRUPT))
+ local_irq_enable();
+
+ status = 0;
+ do {
+ ret = action->handler(irq, action->dev_id, regs);
+ if (ret == IRQ_HANDLED)
+ status |= action->flags;
+ action = action->next;
+ } while (action);
+
+ if (status & SA_SAMPLE_RANDOM)
+ add_interrupt_randomness(irq);
+
+ spin_lock_irq(&irq_controller_lock);
+}
+
+/*
+ * This is for software-decoded IRQs. The caller is expected to
+ * handle the ack, clear, mask and unmask issues.
+ */
+void
+do_simple_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
+{
+ struct irqaction *action;
+ const int cpu = smp_processor_id();
+
+ desc->triggered = 1;
+
+ kstat_cpu(cpu).irqs[irq]++;
+
+ action = desc->action;
+ if (action)
+ __do_irq(irq, desc->action, regs);
+}
+
+/*
+ * Most edge-triggered IRQ implementations seem to take a broken
+ * approach to this. Hence the complexity.
+ */
+void
+do_edge_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
+{
+ const int cpu = smp_processor_id();
+
+ desc->triggered = 1;
+
+ /*
+ * If we're currently running this IRQ, or its disabled,
+ * we shouldn't process the IRQ. Instead, turn on the
+ * hardware masks.
+ */
+ if (unlikely(desc->running || !desc->enabled))
+ goto running;
+
+ /*
+ * Acknowledge and clear the IRQ, but don't mask it.
+ */
+ desc->chip->ack(irq);
+
+ /*
+ * Mark the IRQ currently in progress.
+ */
+ desc->running = 1;
+
+ kstat_cpu(cpu).irqs[irq]++;
+
+ do {
+ struct irqaction *action;
+
+ action = desc->action;
+ if (!action)
+ break;
+
+ if (desc->pending && desc->enabled) {
+ desc->pending = 0;
+ desc->chip->unmask(irq);
+ }
+
+ __do_irq(irq, action, regs);
+ } while (desc->pending);
+
+ desc->running = 0;
+
+ /*
+ * If we were disabled or freed, shut down the handler.
+ */
+ if (likely(desc->action && !check_irq_lock(desc, irq, regs)))
+ return;
+
+ running:
+ /*
+ * We got another IRQ while this one was masked or
+ * currently running. Delay it.
+ */
+ desc->pending = 1;
+ desc->chip->mask(irq);
+ desc->chip->ack(irq);
+}
+
+/*
+ * Level-based IRQ handler. Nice and simple.
+ */
+void
+do_level_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
+{
+ struct irqaction *action;
+ const int cpu = smp_processor_id();
+
+ desc->triggered = 1;
+
+ /*
+ * Acknowledge, clear _AND_ disable the interrupt.
+ */
+ desc->chip->ack(irq);
+
+ if (likely(desc->enabled)) {
+ kstat_cpu(cpu).irqs[irq]++;
+
+ /*
+ * Return with this interrupt masked if no action
+ */
+ action = desc->action;
+ if (action) {
+ __do_irq(irq, desc->action, regs);
+
+ if (likely(desc->enabled &&
+ !check_irq_lock(desc, irq, regs)))
+ desc->chip->unmask(irq);
+ }
+ }
+}
+
+/*
+ * do_IRQ handles all hardware IRQ's. Decoded IRQs should not
+ * come via this function. Instead, they should provide their
+ * own 'handler'
+ */
+asmlinkage void asm_do_IRQ(int irq, struct pt_regs *regs)
+{
+ struct irqdesc *desc = irq_desc + irq;
+
+ /*
+ * Some hardware gives randomly wrong interrupts. Rather
+ * than crashing, do something sensible.
+ */
+ if (irq >= NR_IRQS)
+ desc = &bad_irq_desc;
+
+ irq_enter();
+ spin_lock(&irq_controller_lock);
+ desc->handle(irq, desc, regs);
+ spin_unlock(&irq_controller_lock);
+ irq_exit();
+}
+
+void __set_irq_handler(unsigned int irq, irq_handler_t handle, int is_chained)
+{
+ struct irqdesc *desc;
+ unsigned long flags;
+
+ if (irq >= NR_IRQS) {
+ printk(KERN_ERR "Trying to install handler for IRQ%d\n", irq);
+ return;
+ }
+
+ if (handle == NULL)
+ handle = do_bad_IRQ;
+
+ desc = irq_desc + irq;
+
+ if (is_chained && desc->chip == &bad_chip)
+ printk(KERN_WARNING "Trying to install chained handler for IRQ%d\n", irq);
+
+ spin_lock_irqsave(&irq_controller_lock, flags);
+ if (handle == do_bad_IRQ) {
+ desc->chip->mask(irq);
+ desc->chip->ack(irq);
+ desc->depth = 1;
+ desc->enabled = 0;
+ }
+ desc->handle = handle;
+ if (handle != do_bad_IRQ && is_chained) {
+ desc->valid = 0;
+ desc->probe_ok = 0;
+ desc->depth = 0;
+ desc->chip->unmask(irq);
+ }
+ spin_unlock_irqrestore(&irq_controller_lock, flags);
+}
+
+void set_irq_chip(unsigned int irq, struct irqchip *chip)
+{
+ struct irqdesc *desc;
+ unsigned long flags;
+
+ if (irq >= NR_IRQS) {
+ printk(KERN_ERR "Trying to install chip for IRQ%d\n", irq);
+ return;
+ }
+
+ if (chip == NULL)
+ chip = &bad_chip;
+
+ desc = irq_desc + irq;
+ spin_lock_irqsave(&irq_controller_lock, flags);
+ desc->chip = chip;
+ spin_unlock_irqrestore(&irq_controller_lock, flags);
+}
+
+int set_irq_type(unsigned int irq, unsigned int type)
+{
+ struct irqdesc *desc;
+ unsigned long flags;
+ int ret = -ENXIO;
+
+ if (irq >= NR_IRQS) {
+ printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
+ return -ENODEV;
+ }
+
+ desc = irq_desc + irq;
+ if (desc->chip->type) {
+ spin_lock_irqsave(&irq_controller_lock, flags);
+ ret = desc->chip->type(irq, type);
+ spin_unlock_irqrestore(&irq_controller_lock, flags);
+ }
+
+ return ret;
+}
+
+void set_irq_flags(unsigned int irq, unsigned int iflags)
+{
+ struct irqdesc *desc;
+ unsigned long flags;
+
+ if (irq >= NR_IRQS) {
+ printk(KERN_ERR "Trying to set irq flags for IRQ%d\n", irq);
+ return;
+ }
+
+ desc = irq_desc + irq;
+ spin_lock_irqsave(&irq_controller_lock, flags);
+ desc->valid = (iflags & IRQF_VALID) != 0;
+ desc->probe_ok = (iflags & IRQF_PROBE) != 0;
+ desc->noautoenable = (iflags & IRQF_NOAUTOEN) != 0;
+ spin_unlock_irqrestore(&irq_controller_lock, flags);
+}
+
+int setup_irq(unsigned int irq, struct irqaction *new)
+{
+ int shared = 0;
+ struct irqaction *old, **p;
+ unsigned long flags;
+ struct irqdesc *desc;
+
+ /*
+ * Some drivers like serial.c use request_irq() heavily,
+ * so we have to be careful not to interfere with a
+ * running system.
+ */
+ if (new->flags & SA_SAMPLE_RANDOM) {
+ /*
+ * This function might sleep, we want to call it first,
+ * outside of the atomic block.
+ * Yes, this might clear the entropy pool if the wrong
+ * driver is attempted to be loaded, without actually
+ * installing a new handler, but is this really a problem,
+ * only the sysadmin is able to do this.
+ */
+ rand_initialize_irq(irq);
+ }
+
+ /*
+ * The following block of code has to be executed atomically
+ */
+ desc = irq_desc + irq;
+ spin_lock_irqsave(&irq_controller_lock, flags);
+ p = &desc->action;
+ if ((old = *p) != NULL) {
+ /* Can't share interrupts unless both agree to */
+ if (!(old->flags & new->flags & SA_SHIRQ)) {
+ spin_unlock_irqrestore(&irq_controller_lock, flags);
+ return -EBUSY;
+ }
+
+ /* add new interrupt at end of irq queue */
+ do {
+ p = &old->next;
+ old = *p;
+ } while (old);
+ shared = 1;
+ }
+
+ *p = new;
+
+ if (!shared) {
+ desc->probing = 0;
+ desc->running = 0;
+ desc->pending = 0;
+ desc->depth = 1;
+ if (!desc->noautoenable) {
+ desc->depth = 0;
+ desc->enabled = 1;
+ desc->chip->unmask(irq);
+ }
+ }
+
+ spin_unlock_irqrestore(&irq_controller_lock, flags);
+ return 0;
+}
+
+/**
+ * request_irq - allocate an interrupt line
+ * @irq: Interrupt line to allocate
+ * @handler: Function to be called when the IRQ occurs
+ * @irqflags: Interrupt type flags
+ * @devname: An ascii name for the claiming device
+ * @dev_id: A cookie passed back to the handler function
+ *
+ * This call allocates interrupt resources and enables the
+ * interrupt line and IRQ handling. From the point this
+ * call is made your handler function may be invoked. Since
+ * your handler function must clear any interrupt the board
+ * raises, you must take care both to initialise your hardware
+ * and to set up the interrupt handler in the right order.
+ *
+ * Dev_id must be globally unique. Normally the address of the
+ * device data structure is used as the cookie. Since the handler
+ * receives this value it makes sense to use it.
+ *
+ * If your interrupt is shared you must pass a non NULL dev_id
+ * as this is required when freeing the interrupt.
+ *
+ * Flags:
+ *
+ * SA_SHIRQ Interrupt is shared
+ *
+ * SA_INTERRUPT Disable local interrupts while processing
+ *
+ * SA_SAMPLE_RANDOM The interrupt can be used for entropy
+ *
+ */
+
+//FIXME - handler used to return void - whats the significance of the change?
+int request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
+ unsigned long irq_flags, const char * devname, void *dev_id)
+{
+ unsigned long retval;
+ struct irqaction *action;
+
+ if (irq >= NR_IRQS || !irq_desc[irq].valid || !handler ||
+ (irq_flags & SA_SHIRQ && !dev_id))
+ return -EINVAL;
+
+ action = (struct irqaction *)kmalloc(sizeof(struct irqaction), GFP_KERNEL);
+ if (!action)
+ return -ENOMEM;
+
+ action->handler = handler;
+ action->flags = irq_flags;
+ cpus_clear(action->mask);
+ action->name = devname;
+ action->next = NULL;
+ action->dev_id = dev_id;
+
+ retval = setup_irq(irq, action);
+
+ if (retval)
+ kfree(action);
+ return retval;
+}
+
+EXPORT_SYMBOL(request_irq);
+
+/**
+ * free_irq - free an interrupt
+ * @irq: Interrupt line to free
+ * @dev_id: Device identity to free
+ *
+ * Remove an interrupt handler. The handler is removed and if the
+ * interrupt line is no longer in use by any driver it is disabled.
+ * On a shared IRQ the caller must ensure the interrupt is disabled
+ * on the card it drives before calling this function.
+ *
+ * This function may be called from interrupt context.
+ */
+void free_irq(unsigned int irq, void *dev_id)
+{
+ struct irqaction * action, **p;
+ unsigned long flags;
+
+ if (irq >= NR_IRQS || !irq_desc[irq].valid) {
+ printk(KERN_ERR "Trying to free IRQ%d\n",irq);
+#ifdef CONFIG_DEBUG_ERRORS
+ __backtrace();
+#endif
+ return;
+ }
+
+ spin_lock_irqsave(&irq_controller_lock, flags);
+ for (p = &irq_desc[irq].action; (action = *p) != NULL; p = &action->next) {
+ if (action->dev_id != dev_id)
+ continue;
+
+ /* Found it - now free it */
+ *p = action->next;
+ kfree(action);
+ goto out;
+ }
+ printk(KERN_ERR "Trying to free free IRQ%d\n",irq);
+#ifdef CONFIG_DEBUG_ERRORS
+ __backtrace();
+#endif
+out:
+ spin_unlock_irqrestore(&irq_controller_lock, flags);
+}
+
+EXPORT_SYMBOL(free_irq);
+
+/* Start the interrupt probing. Unlike other architectures,
+ * we don't return a mask of interrupts from probe_irq_on,
+ * but return the number of interrupts enabled for the probe.
+ * The interrupts which have been enabled for probing is
+ * instead recorded in the irq_desc structure.
+ */
+unsigned long probe_irq_on(void)
+{
+ unsigned int i, irqs = 0;
+ unsigned long delay;
+
+ /*
+ * first snaffle up any unassigned but
+ * probe-able interrupts
+ */
+ spin_lock_irq(&irq_controller_lock);
+ for (i = 0; i < NR_IRQS; i++) {
+ if (!irq_desc[i].probe_ok || irq_desc[i].action)
+ continue;
+
+ irq_desc[i].probing = 1;
+ irq_desc[i].triggered = 0;
+ if (irq_desc[i].chip->type)
+ irq_desc[i].chip->type(i, IRQT_PROBE);
+ irq_desc[i].chip->unmask(i);
+ irqs += 1;
+ }
+ spin_unlock_irq(&irq_controller_lock);
+
+ /*
+ * wait for spurious interrupts to mask themselves out again
+ */
+ for (delay = jiffies + HZ/10; time_before(jiffies, delay); )
+ /* min 100ms delay */;
+
+ /*
+ * now filter out any obviously spurious interrupts
+ */
+ spin_lock_irq(&irq_controller_lock);
+ for (i = 0; i < NR_IRQS; i++) {
+ if (irq_desc[i].probing && irq_desc[i].triggered) {
+ irq_desc[i].probing = 0;
+ irqs -= 1;
+ }
+ }
+ spin_unlock_irq(&irq_controller_lock);
+
+ return irqs;
+}
+
+EXPORT_SYMBOL(probe_irq_on);
+
+/*
+ * Possible return values:
+ * >= 0 - interrupt number
+ * -1 - no interrupt/many interrupts
+ */
+int probe_irq_off(unsigned long irqs)
+{
+ unsigned int i;
+ int irq_found = NO_IRQ;
+
+ /*
+ * look at the interrupts, and find exactly one
+ * that we were probing has been triggered
+ */
+ spin_lock_irq(&irq_controller_lock);
+ for (i = 0; i < NR_IRQS; i++) {
+ if (irq_desc[i].probing &&
+ irq_desc[i].triggered) {
+ if (irq_found != NO_IRQ) {
+ irq_found = NO_IRQ;
+ goto out;
+ }
+ irq_found = i;
+ }
+ }
+
+ if (irq_found == -1)
+ irq_found = NO_IRQ;
+out:
+ spin_unlock_irq(&irq_controller_lock);
+
+ return irq_found;
+}
+
+EXPORT_SYMBOL(probe_irq_off);
+
+void __init init_irq_proc(void)
+{
+}
+
+void __init init_IRQ(void)
+{
+ struct irqdesc *desc;
+ extern void init_dma(void);
+ int irq;
+
+ for (irq = 0, desc = irq_desc; irq < NR_IRQS; irq++, desc++)
+ *desc = bad_irq_desc;
+
+ arc_init_irq();
+ init_dma();
+}
diff --git a/arch/arm26/kernel/process.c b/arch/arm26/kernel/process.c
new file mode 100644
index 0000000..46aea6a
--- /dev/null
+++ b/arch/arm26/kernel/process.c
@@ -0,0 +1,401 @@
+/*
+ * linux/arch/arm26/kernel/process.c
+ *
+ * Copyright (C) 2003 Ian Molton - adapted for ARM26
+ * Copyright (C) 1996-2000 Russell King - Converted to ARM.
+ * Origional Copyright (C) 1995 Linus Torvalds
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <stdarg.h>
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/delay.h>
+#include <linux/reboot.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/leds.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+
+extern const char *processor_modes[];
+extern void setup_mm_for_reboot(char mode);
+
+static volatile int hlt_counter;
+
+void disable_hlt(void)
+{
+ hlt_counter++;
+}
+
+EXPORT_SYMBOL(disable_hlt);
+
+void enable_hlt(void)
+{
+ hlt_counter--;
+}
+
+EXPORT_SYMBOL(enable_hlt);
+
+static int __init nohlt_setup(char *__unused)
+{
+ hlt_counter = 1;
+ return 1;
+}
+
+static int __init hlt_setup(char *__unused)
+{
+ hlt_counter = 0;
+ return 1;
+}
+
+__setup("nohlt", nohlt_setup);
+__setup("hlt", hlt_setup);
+
+/*
+ * This is our default idle handler. We need to disable
+ * interrupts here to ensure we don't miss a wakeup call.
+ */
+void cpu_idle(void)
+{
+ /* endless idle loop with no priority at all */
+ preempt_disable();
+ while (1) {
+ while (!need_resched()) {
+ local_irq_disable();
+ if (!need_resched() && !hlt_counter)
+ local_irq_enable();
+ }
+ }
+ schedule();
+}
+
+static char reboot_mode = 'h';
+
+int __init reboot_setup(char *str)
+{
+ reboot_mode = str[0];
+ return 1;
+}
+
+__setup("reboot=", reboot_setup);
+
+/* ARM26 cant do these but we still need to define them. */
+void machine_halt(void)
+{
+}
+void machine_power_off(void)
+{
+}
+
+EXPORT_SYMBOL(machine_halt);
+EXPORT_SYMBOL(machine_power_off);
+
+void machine_restart(char * __unused)
+{
+ /*
+ * Clean and disable cache, and turn off interrupts
+ */
+ cpu_proc_fin();
+
+ /*
+ * Tell the mm system that we are going to reboot -
+ * we may need it to insert some 1:1 mappings so that
+ * soft boot works.
+ */
+ setup_mm_for_reboot(reboot_mode);
+
+ /*
+ * copy branch instruction to reset location and call it
+ */
+
+ *(unsigned long *)0 = *(unsigned long *)0x03800000;
+ ((void(*)(void))0)();
+
+ /*
+ * Whoops - the architecture was unable to reboot.
+ * Tell the user! Should never happen...
+ */
+ mdelay(1000);
+ printk("Reboot failed -- System halted\n");
+ while (1);
+}
+
+EXPORT_SYMBOL(machine_restart);
+
+void show_regs(struct pt_regs * regs)
+{
+ unsigned long flags;
+
+ flags = condition_codes(regs);
+
+ printk("pc : [<%08lx>] lr : [<%08lx>] %s\n"
+ "sp : %08lx ip : %08lx fp : %08lx\n",
+ instruction_pointer(regs),
+ regs->ARM_lr, print_tainted(), regs->ARM_sp,
+ regs->ARM_ip, regs->ARM_fp);
+ printk("r10: %08lx r9 : %08lx r8 : %08lx\n",
+ regs->ARM_r10, regs->ARM_r9,
+ regs->ARM_r8);
+ printk("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
+ regs->ARM_r7, regs->ARM_r6,
+ regs->ARM_r5, regs->ARM_r4);
+ printk("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
+ regs->ARM_r3, regs->ARM_r2,
+ regs->ARM_r1, regs->ARM_r0);
+ printk("Flags: %c%c%c%c",
+ flags & PSR_N_BIT ? 'N' : 'n',
+ flags & PSR_Z_BIT ? 'Z' : 'z',
+ flags & PSR_C_BIT ? 'C' : 'c',
+ flags & PSR_V_BIT ? 'V' : 'v');
+ printk(" IRQs o%s FIQs o%s Mode %s Segment %s\n",
+ interrupts_enabled(regs) ? "n" : "ff",
+ fast_interrupts_enabled(regs) ? "n" : "ff",
+ processor_modes[processor_mode(regs)],
+ get_fs() == get_ds() ? "kernel" : "user");
+}
+
+void show_fpregs(struct user_fp *regs)
+{
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ unsigned long *p;
+ char type;
+
+ p = (unsigned long *)(regs->fpregs + i);
+
+ switch (regs->ftype[i]) {
+ case 1: type = 'f'; break;
+ case 2: type = 'd'; break;
+ case 3: type = 'e'; break;
+ default: type = '?'; break;
+ }
+ if (regs->init_flag)
+ type = '?';
+
+ printk(" f%d(%c): %08lx %08lx %08lx%c",
+ i, type, p[0], p[1], p[2], i & 1 ? '\n' : ' ');
+ }
+
+
+ printk("FPSR: %08lx FPCR: %08lx\n",
+ (unsigned long)regs->fpsr,
+ (unsigned long)regs->fpcr);
+}
+
+/*
+ * Task structure and kernel stack allocation.
+ */
+static unsigned long *thread_info_head;
+static unsigned int nr_thread_info;
+
+extern unsigned long get_page_8k(int priority);
+extern void free_page_8k(unsigned long page);
+
+// FIXME - is this valid?
+#define EXTRA_TASK_STRUCT 0
+#define ll_alloc_task_struct() ((struct thread_info *)get_page_8k(GFP_KERNEL))
+#define ll_free_task_struct(p) free_page_8k((unsigned long)(p))
+
+//FIXME - do we use *task param below looks like we dont, which is ok?
+//FIXME - if EXTRA_TASK_STRUCT is zero we can optimise the below away permanently. *IF* its supposed to be zero.
+struct thread_info *alloc_thread_info(struct task_struct *task)
+{
+ struct thread_info *thread = NULL;
+
+ if (EXTRA_TASK_STRUCT) {
+ unsigned long *p = thread_info_head;
+
+ if (p) {
+ thread_info_head = (unsigned long *)p[0];
+ nr_thread_info -= 1;
+ }
+ thread = (struct thread_info *)p;
+ }
+
+ if (!thread)
+ thread = ll_alloc_task_struct();
+
+#ifdef CONFIG_MAGIC_SYSRQ
+ /*
+ * The stack must be cleared if you want SYSRQ-T to
+ * give sensible stack usage information
+ */
+ if (thread) {
+ char *p = (char *)thread;
+ memzero(p+KERNEL_STACK_SIZE, KERNEL_STACK_SIZE);
+ }
+#endif
+ return thread;
+}
+
+void free_thread_info(struct thread_info *thread)
+{
+ if (EXTRA_TASK_STRUCT && nr_thread_info < EXTRA_TASK_STRUCT) {
+ unsigned long *p = (unsigned long *)thread;
+ p[0] = (unsigned long)thread_info_head;
+ thread_info_head = p;
+ nr_thread_info += 1;
+ } else
+ ll_free_task_struct(thread);
+}
+
+/*
+ * Free current thread data structures etc..
+ */
+void exit_thread(void)
+{
+}
+
+void flush_thread(void)
+{
+ struct thread_info *thread = current_thread_info();
+ struct task_struct *tsk = current;
+
+ memset(&tsk->thread.debug, 0, sizeof(struct debug_info));
+ memset(&thread->fpstate, 0, sizeof(union fp_state));
+
+ clear_used_math();
+}
+
+void release_thread(struct task_struct *dead_task)
+{
+}
+
+asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
+
+int
+copy_thread(int nr, unsigned long clone_flags, unsigned long stack_start,
+ unsigned long unused, struct task_struct *p, struct pt_regs *regs)
+{
+ struct thread_info *thread = p->thread_info;
+ struct pt_regs *childregs;
+
+ childregs = __get_user_regs(thread);
+ *childregs = *regs;
+ childregs->ARM_r0 = 0;
+ childregs->ARM_sp = stack_start;
+
+ memset(&thread->cpu_context, 0, sizeof(struct cpu_context_save));
+ thread->cpu_context.sp = (unsigned long)childregs;
+ thread->cpu_context.pc = (unsigned long)ret_from_fork | MODE_SVC26 | PSR_I_BIT;
+
+ return 0;
+}
+
+/*
+ * fill in the fpe structure for a core dump...
+ */
+int dump_fpu (struct pt_regs *regs, struct user_fp *fp)
+{
+ struct thread_info *thread = current_thread_info();
+ int used_math = !!used_math();
+
+ if (used_math)
+ memcpy(fp, &thread->fpstate.soft, sizeof (*fp));
+
+ return used_math;
+}
+
+/*
+ * fill in the user structure for a core dump..
+ */
+void dump_thread(struct pt_regs * regs, struct user * dump)
+{
+ struct task_struct *tsk = current;
+
+ dump->magic = CMAGIC;
+ dump->start_code = tsk->mm->start_code;
+ dump->start_stack = regs->ARM_sp & ~(PAGE_SIZE - 1);
+
+ dump->u_tsize = (tsk->mm->end_code - tsk->mm->start_code) >> PAGE_SHIFT;
+ dump->u_dsize = (tsk->mm->brk - tsk->mm->start_data + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ dump->u_ssize = 0;
+
+ dump->u_debugreg[0] = tsk->thread.debug.bp[0].address;
+ dump->u_debugreg[1] = tsk->thread.debug.bp[1].address;
+ dump->u_debugreg[2] = tsk->thread.debug.bp[0].insn;
+ dump->u_debugreg[3] = tsk->thread.debug.bp[1].insn;
+ dump->u_debugreg[4] = tsk->thread.debug.nsaved;
+
+ if (dump->start_stack < 0x04000000)
+ dump->u_ssize = (0x04000000 - dump->start_stack) >> PAGE_SHIFT;
+
+ dump->regs = *regs;
+ dump->u_fpvalid = dump_fpu (regs, &dump->u_fp);
+}
+
+/*
+ * Shuffle the argument into the correct register before calling the
+ * thread function. r1 is the thread argument, r2 is the pointer to
+ * the thread function, and r3 points to the exit function.
+ * FIXME - make sure this is right - the older code used to zero fp
+ * and cause the parent to call sys_exit (do_exit in this version)
+ */
+extern void kernel_thread_helper(void);
+
+asm( ".section .text\n"
+" .align\n"
+" .type kernel_thread_helper, #function\n"
+"kernel_thread_helper:\n"
+" mov r0, r1\n"
+" mov lr, r3\n"
+" mov pc, r2\n"
+" .size kernel_thread_helper, . - kernel_thread_helper\n"
+" .previous");
+
+/*
+ * Create a kernel thread.
+ */
+pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
+{
+ struct pt_regs regs;
+
+ memset(&regs, 0, sizeof(regs));
+
+ regs.ARM_r1 = (unsigned long)arg;
+ regs.ARM_r2 = (unsigned long)fn;
+ regs.ARM_r3 = (unsigned long)do_exit;
+ regs.ARM_pc = (unsigned long)kernel_thread_helper | MODE_SVC26;
+
+ return do_fork(flags|CLONE_VM|CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
+}
+EXPORT_SYMBOL(kernel_thread);
+
+
+unsigned long get_wchan(struct task_struct *p)
+{
+ unsigned long fp, lr;
+ unsigned long stack_page;
+ int count = 0;
+ if (!p || p == current || p->state == TASK_RUNNING)
+ return 0;
+
+ stack_page = 4096 + (unsigned long)p;
+ fp = thread_saved_fp(p);
+ do {
+ if (fp < stack_page || fp > 4092+stack_page)
+ return 0;
+ lr = pc_pointer (((unsigned long *)fp)[-1]);
+ if (!in_sched_functions(lr))
+ return lr;
+ fp = *(unsigned long *) (fp - 12);
+ } while (count ++ < 16);
+ return 0;
+}
diff --git a/arch/arm26/kernel/ptrace.c b/arch/arm26/kernel/ptrace.c
new file mode 100644
index 0000000..2a13714
--- /dev/null
+++ b/arch/arm26/kernel/ptrace.c
@@ -0,0 +1,744 @@
+/*
+ * linux/arch/arm26/kernel/ptrace.c
+ *
+ * By Ross Biro 1/23/92
+ * edited by Linus Torvalds
+ * ARM modifications Copyright (C) 2000 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/ptrace.h>
+#include <linux/user.h>
+#include <linux/security.h>
+
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+//#include <asm/processor.h>
+
+#include "ptrace.h"
+
+#define REG_PC 15
+#define REG_PSR 15
+/*
+ * does not yet catch signals sent when the child dies.
+ * in exit.c or in signal.c.
+ */
+
+/*
+ * Breakpoint SWI instruction: SWI &9F0001
+ */
+#define BREAKINST_ARM 0xef9f0001
+
+/*
+ * Get the address of the live pt_regs for the specified task.
+ * These are saved onto the top kernel stack when the process
+ * is not running.
+ *
+ * Note: if a user thread is execve'd from kernel space, the
+ * kernel stack will not be empty on entry to the kernel, so
+ * ptracing these tasks will fail.
+ */
+static inline struct pt_regs *
+get_user_regs(struct task_struct *task)
+{
+ return __get_user_regs(task->thread_info);
+}
+
+/*
+ * this routine will get a word off of the processes privileged stack.
+ * the offset is how far from the base addr as stored in the THREAD.
+ * this routine assumes that all the privileged stacks are in our
+ * data space.
+ */
+static inline long get_user_reg(struct task_struct *task, int offset)
+{
+ return get_user_regs(task)->uregs[offset];
+}
+
+/*
+ * this routine will put a word on the processes privileged stack.
+ * the offset is how far from the base addr as stored in the THREAD.
+ * this routine assumes that all the privileged stacks are in our
+ * data space.
+ */
+static inline int
+put_user_reg(struct task_struct *task, int offset, long data)
+{
+ struct pt_regs newregs, *regs = get_user_regs(task);
+ int ret = -EINVAL;
+
+ newregs = *regs;
+ newregs.uregs[offset] = data;
+
+ if (valid_user_regs(&newregs)) {
+ regs->uregs[offset] = data;
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static inline int
+read_u32(struct task_struct *task, unsigned long addr, u32 *res)
+{
+ int ret;
+
+ ret = access_process_vm(task, addr, res, sizeof(*res), 0);
+
+ return ret == sizeof(*res) ? 0 : -EIO;
+}
+
+static inline int
+read_instr(struct task_struct *task, unsigned long addr, u32 *res)
+{
+ int ret;
+ u32 val;
+ ret = access_process_vm(task, addr & ~3, &val, sizeof(val), 0);
+ ret = ret == sizeof(val) ? 0 : -EIO;
+ *res = val;
+ return ret;
+}
+
+/*
+ * Get value of register `rn' (in the instruction)
+ */
+static unsigned long
+ptrace_getrn(struct task_struct *child, unsigned long insn)
+{
+ unsigned int reg = (insn >> 16) & 15;
+ unsigned long val;
+
+ val = get_user_reg(child, reg);
+ if (reg == 15)
+ val = pc_pointer(val + 8); //FIXME - correct for arm26?
+
+ return val;
+}
+
+/*
+ * Get value of operand 2 (in an ALU instruction)
+ */
+static unsigned long
+ptrace_getaluop2(struct task_struct *child, unsigned long insn)
+{
+ unsigned long val;
+ int shift;
+ int type;
+
+ if (insn & 1 << 25) {
+ val = insn & 255;
+ shift = (insn >> 8) & 15;
+ type = 3;
+ } else {
+ val = get_user_reg (child, insn & 15);
+
+ if (insn & (1 << 4))
+ shift = (int)get_user_reg (child, (insn >> 8) & 15);
+ else
+ shift = (insn >> 7) & 31;
+
+ type = (insn >> 5) & 3;
+ }
+
+ switch (type) {
+ case 0: val <<= shift; break;
+ case 1: val >>= shift; break;
+ case 2:
+ val = (((signed long)val) >> shift);
+ break;
+ case 3:
+ val = (val >> shift) | (val << (32 - shift));
+ break;
+ }
+ return val;
+}
+
+/*
+ * Get value of operand 2 (in a LDR instruction)
+ */
+static unsigned long
+ptrace_getldrop2(struct task_struct *child, unsigned long insn)
+{
+ unsigned long val;
+ int shift;
+ int type;
+
+ val = get_user_reg(child, insn & 15);
+ shift = (insn >> 7) & 31;
+ type = (insn >> 5) & 3;
+
+ switch (type) {
+ case 0: val <<= shift; break;
+ case 1: val >>= shift; break;
+ case 2:
+ val = (((signed long)val) >> shift);
+ break;
+ case 3:
+ val = (val >> shift) | (val << (32 - shift));
+ break;
+ }
+ return val;
+}
+
+#define OP_MASK 0x01e00000
+#define OP_AND 0x00000000
+#define OP_EOR 0x00200000
+#define OP_SUB 0x00400000
+#define OP_RSB 0x00600000
+#define OP_ADD 0x00800000
+#define OP_ADC 0x00a00000
+#define OP_SBC 0x00c00000
+#define OP_RSC 0x00e00000
+#define OP_ORR 0x01800000
+#define OP_MOV 0x01a00000
+#define OP_BIC 0x01c00000
+#define OP_MVN 0x01e00000
+
+static unsigned long
+get_branch_address(struct task_struct *child, unsigned long pc, unsigned long insn)
+{
+ u32 alt = 0;
+
+ switch (insn & 0x0e000000) {
+ case 0x00000000:
+ case 0x02000000: {
+ /*
+ * data processing
+ */
+ long aluop1, aluop2, ccbit;
+
+ if ((insn & 0xf000) != 0xf000)
+ break;
+
+ aluop1 = ptrace_getrn(child, insn);
+ aluop2 = ptrace_getaluop2(child, insn);
+ ccbit = get_user_reg(child, REG_PSR) & PSR_C_BIT ? 1 : 0;
+
+ switch (insn & OP_MASK) {
+ case OP_AND: alt = aluop1 & aluop2; break;
+ case OP_EOR: alt = aluop1 ^ aluop2; break;
+ case OP_SUB: alt = aluop1 - aluop2; break;
+ case OP_RSB: alt = aluop2 - aluop1; break;
+ case OP_ADD: alt = aluop1 + aluop2; break;
+ case OP_ADC: alt = aluop1 + aluop2 + ccbit; break;
+ case OP_SBC: alt = aluop1 - aluop2 + ccbit; break;
+ case OP_RSC: alt = aluop2 - aluop1 + ccbit; break;
+ case OP_ORR: alt = aluop1 | aluop2; break;
+ case OP_MOV: alt = aluop2; break;
+ case OP_BIC: alt = aluop1 & ~aluop2; break;
+ case OP_MVN: alt = ~aluop2; break;
+ }
+ break;
+ }
+
+ case 0x04000000:
+ case 0x06000000:
+ /*
+ * ldr
+ */
+ if ((insn & 0x0010f000) == 0x0010f000) {
+ unsigned long base;
+
+ base = ptrace_getrn(child, insn);
+ if (insn & 1 << 24) {
+ long aluop2;
+
+ if (insn & 0x02000000)
+ aluop2 = ptrace_getldrop2(child, insn);
+ else
+ aluop2 = insn & 0xfff;
+
+ if (insn & 1 << 23)
+ base += aluop2;
+ else
+ base -= aluop2;
+ }
+ if (read_u32(child, base, &alt) == 0)
+ alt = pc_pointer(alt);
+ }
+ break;
+
+ case 0x08000000:
+ /*
+ * ldm
+ */
+ if ((insn & 0x00108000) == 0x00108000) {
+ unsigned long base;
+ unsigned int nr_regs;
+
+ if (insn & (1 << 23)) {
+ nr_regs = hweight16(insn & 65535) << 2;
+
+ if (!(insn & (1 << 24)))
+ nr_regs -= 4;
+ } else {
+ if (insn & (1 << 24))
+ nr_regs = -4;
+ else
+ nr_regs = 0;
+ }
+
+ base = ptrace_getrn(child, insn);
+
+ if (read_u32(child, base + nr_regs, &alt) == 0)
+ alt = pc_pointer(alt);
+ break;
+ }
+ break;
+
+ case 0x0a000000: {
+ /*
+ * bl or b
+ */
+ signed long displ;
+ /* It's a branch/branch link: instead of trying to
+ * figure out whether the branch will be taken or not,
+ * we'll put a breakpoint at both locations. This is
+ * simpler, more reliable, and probably not a whole lot
+ * slower than the alternative approach of emulating the
+ * branch.
+ */
+ displ = (insn & 0x00ffffff) << 8;
+ displ = (displ >> 6) + 8;
+ if (displ != 0 && displ != 4)
+ alt = pc + displ;
+ }
+ break;
+ }
+
+ return alt;
+}
+
+static int
+swap_insn(struct task_struct *task, unsigned long addr,
+ void *old_insn, void *new_insn, int size)
+{
+ int ret;
+
+ ret = access_process_vm(task, addr, old_insn, size, 0);
+ if (ret == size)
+ ret = access_process_vm(task, addr, new_insn, size, 1);
+ return ret;
+}
+
+static void
+add_breakpoint(struct task_struct *task, struct debug_info *dbg, unsigned long addr)
+{
+ int nr = dbg->nsaved;
+
+ if (nr < 2) {
+ u32 new_insn = BREAKINST_ARM;
+ int res;
+
+ res = swap_insn(task, addr, &dbg->bp[nr].insn, &new_insn, 4);
+
+ if (res == 4) {
+ dbg->bp[nr].address = addr;
+ dbg->nsaved += 1;
+ }
+ } else
+ printk(KERN_ERR "ptrace: too many breakpoints\n");
+}
+
+/*
+ * Clear one breakpoint in the user program. We copy what the hardware
+ * does and use bit 0 of the address to indicate whether this is a Thumb
+ * breakpoint or an ARM breakpoint.
+ */
+static void clear_breakpoint(struct task_struct *task, struct debug_entry *bp)
+{
+ unsigned long addr = bp->address;
+ u32 old_insn;
+ int ret;
+
+ ret = swap_insn(task, addr & ~3, &old_insn,
+ &bp->insn, 4);
+
+ if (ret != 4 || old_insn != BREAKINST_ARM)
+ printk(KERN_ERR "%s:%d: corrupted ARM breakpoint at "
+ "0x%08lx (0x%08x)\n", task->comm, task->pid,
+ addr, old_insn);
+}
+
+void ptrace_set_bpt(struct task_struct *child)
+{
+ struct pt_regs *regs;
+ unsigned long pc;
+ u32 insn;
+ int res;
+
+ regs = get_user_regs(child);
+ pc = instruction_pointer(regs);
+
+ res = read_instr(child, pc, &insn);
+ if (!res) {
+ struct debug_info *dbg = &child->thread.debug;
+ unsigned long alt;
+
+ dbg->nsaved = 0;
+
+ alt = get_branch_address(child, pc, insn);
+ if (alt)
+ add_breakpoint(child, dbg, alt);
+
+ /*
+ * Note that we ignore the result of setting the above
+ * breakpoint since it may fail. When it does, this is
+ * not so much an error, but a forewarning that we may
+ * be receiving a prefetch abort shortly.
+ *
+ * If we don't set this breakpoint here, then we can
+ * lose control of the thread during single stepping.
+ */
+ if (!alt || predicate(insn) != PREDICATE_ALWAYS)
+ add_breakpoint(child, dbg, pc + 4);
+ }
+}
+
+/*
+ * Ensure no single-step breakpoint is pending. Returns non-zero
+ * value if child was being single-stepped.
+ */
+void ptrace_cancel_bpt(struct task_struct *child)
+{
+ int i, nsaved = child->thread.debug.nsaved;
+
+ child->thread.debug.nsaved = 0;
+
+ if (nsaved > 2) {
+ printk("ptrace_cancel_bpt: bogus nsaved: %d!\n", nsaved);
+ nsaved = 2;
+ }
+
+ for (i = 0; i < nsaved; i++)
+ clear_breakpoint(child, &child->thread.debug.bp[i]);
+}
+
+/*
+ * Called by kernel/ptrace.c when detaching..
+ *
+ * Make sure the single step bit is not set.
+ */
+void ptrace_disable(struct task_struct *child)
+{
+ child->ptrace &= ~PT_SINGLESTEP;
+ ptrace_cancel_bpt(child);
+}
+
+/*
+ * Handle hitting a breakpoint.
+ */
+void ptrace_break(struct task_struct *tsk, struct pt_regs *regs)
+{
+ siginfo_t info;
+
+ /*
+ * The PC is always left pointing at the next instruction. Fix this.
+ */
+ regs->ARM_pc -= 4;
+
+ if (tsk->thread.debug.nsaved == 0)
+ printk(KERN_ERR "ptrace: bogus breakpoint trap\n");
+
+ ptrace_cancel_bpt(tsk);
+
+ info.si_signo = SIGTRAP;
+ info.si_errno = 0;
+ info.si_code = TRAP_BRKPT;
+ info.si_addr = (void *)instruction_pointer(regs) - 4;
+
+ force_sig_info(SIGTRAP, &info, tsk);
+}
+
+/*
+ * Read the word at offset "off" into the "struct user". We
+ * actually access the pt_regs stored on the kernel stack.
+ */
+static int ptrace_read_user(struct task_struct *tsk, unsigned long off,
+ unsigned long *ret)
+{
+ unsigned long tmp;
+
+ if (off & 3 || off >= sizeof(struct user))
+ return -EIO;
+
+ tmp = 0;
+ if (off < sizeof(struct pt_regs))
+ tmp = get_user_reg(tsk, off >> 2);
+
+ return put_user(tmp, ret);
+}
+
+/*
+ * Write the word at offset "off" into "struct user". We
+ * actually access the pt_regs stored on the kernel stack.
+ */
+static int ptrace_write_user(struct task_struct *tsk, unsigned long off,
+ unsigned long val)
+{
+ if (off & 3 || off >= sizeof(struct user))
+ return -EIO;
+
+ if (off >= sizeof(struct pt_regs))
+ return 0;
+
+ return put_user_reg(tsk, off >> 2, val);
+}
+
+/*
+ * Get all user integer registers.
+ */
+static int ptrace_getregs(struct task_struct *tsk, void *uregs)
+{
+ struct pt_regs *regs = get_user_regs(tsk);
+
+ return copy_to_user(uregs, regs, sizeof(struct pt_regs)) ? -EFAULT : 0;
+}
+
+/*
+ * Set all user integer registers.
+ */
+static int ptrace_setregs(struct task_struct *tsk, void *uregs)
+{
+ struct pt_regs newregs;
+ int ret;
+
+ ret = -EFAULT;
+ if (copy_from_user(&newregs, uregs, sizeof(struct pt_regs)) == 0) {
+ struct pt_regs *regs = get_user_regs(tsk);
+
+ ret = -EINVAL;
+ if (valid_user_regs(&newregs)) {
+ *regs = newregs;
+ ret = 0;
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * Get the child FPU state.
+ */
+static int ptrace_getfpregs(struct task_struct *tsk, void *ufp)
+{
+ return copy_to_user(ufp, &tsk->thread_info->fpstate,
+ sizeof(struct user_fp)) ? -EFAULT : 0;
+}
+
+/*
+ * Set the child FPU state.
+ */
+static int ptrace_setfpregs(struct task_struct *tsk, void *ufp)
+{
+ set_stopped_child_used_math(tsk);
+ return copy_from_user(&tsk->thread_info->fpstate, ufp,
+ sizeof(struct user_fp)) ? -EFAULT : 0;
+}
+
+static int do_ptrace(int request, struct task_struct *child, long addr, long data)
+{
+ unsigned long tmp;
+ int ret;
+
+ switch (request) {
+ /*
+ * read word at location "addr" in the child process.
+ */
+ case PTRACE_PEEKTEXT:
+ case PTRACE_PEEKDATA:
+ ret = access_process_vm(child, addr, &tmp,
+ sizeof(unsigned long), 0);
+ if (ret == sizeof(unsigned long))
+ ret = put_user(tmp, (unsigned long *) data);
+ else
+ ret = -EIO;
+ break;
+
+ case PTRACE_PEEKUSR:
+ ret = ptrace_read_user(child, addr, (unsigned long *)data);
+ break;
+
+ /*
+ * write the word at location addr.
+ */
+ case PTRACE_POKETEXT:
+ case PTRACE_POKEDATA:
+ ret = access_process_vm(child, addr, &data,
+ sizeof(unsigned long), 1);
+ if (ret == sizeof(unsigned long))
+ ret = 0;
+ else
+ ret = -EIO;
+ break;
+
+ case PTRACE_POKEUSR:
+ ret = ptrace_write_user(child, addr, data);
+ break;
+
+ /*
+ * continue/restart and stop at next (return from) syscall
+ */
+ case PTRACE_SYSCALL:
+ case PTRACE_CONT:
+ ret = -EIO;
+ if ((unsigned long) data > _NSIG)
+ break;
+ if (request == PTRACE_SYSCALL)
+ set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+ else
+ clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+ child->exit_code = data;
+ /* make sure single-step breakpoint is gone. */
+ child->ptrace &= ~PT_SINGLESTEP;
+ ptrace_cancel_bpt(child);
+ wake_up_process(child);
+ ret = 0;
+ break;
+
+ /*
+ * make the child exit. Best I can do is send it a sigkill.
+ * perhaps it should be put in the status that it wants to
+ * exit.
+ */
+ case PTRACE_KILL:
+ /* make sure single-step breakpoint is gone. */
+ child->ptrace &= ~PT_SINGLESTEP;
+ ptrace_cancel_bpt(child);
+ if (child->exit_state != EXIT_ZOMBIE) {
+ child->exit_code = SIGKILL;
+ wake_up_process(child);
+ }
+ ret = 0;
+ break;
+
+ /*
+ * execute single instruction.
+ */
+ case PTRACE_SINGLESTEP:
+ ret = -EIO;
+ if ((unsigned long) data > _NSIG)
+ break;
+ child->ptrace |= PT_SINGLESTEP;
+ clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+ child->exit_code = data;
+ /* give it a chance to run. */
+ wake_up_process(child);
+ ret = 0;
+ break;
+
+ case PTRACE_DETACH:
+ ret = ptrace_detach(child, data);
+ break;
+
+ case PTRACE_GETREGS:
+ ret = ptrace_getregs(child, (void *)data);
+ break;
+
+ case PTRACE_SETREGS:
+ ret = ptrace_setregs(child, (void *)data);
+ break;
+
+ case PTRACE_GETFPREGS:
+ ret = ptrace_getfpregs(child, (void *)data);
+ break;
+
+ case PTRACE_SETFPREGS:
+ ret = ptrace_setfpregs(child, (void *)data);
+ break;
+
+ default:
+ ret = ptrace_request(child, request, addr, data);
+ break;
+ }
+
+ return ret;
+}
+
+asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
+{
+ struct task_struct *child;
+ int ret;
+
+ lock_kernel();
+ ret = -EPERM;
+ if (request == PTRACE_TRACEME) {
+ /* are we already being traced? */
+ if (current->ptrace & PT_PTRACED)
+ goto out;
+ ret = security_ptrace(current->parent, current);
+ if (ret)
+ goto out;
+ /* set the ptrace bit in the process flags. */
+ current->ptrace |= PT_PTRACED;
+ ret = 0;
+ goto out;
+ }
+ ret = -ESRCH;
+ read_lock(&tasklist_lock);
+ child = find_task_by_pid(pid);
+ if (child)
+ get_task_struct(child);
+ read_unlock(&tasklist_lock);
+ if (!child)
+ goto out;
+
+ ret = -EPERM;
+ if (pid == 1) /* you may not mess with init */
+ goto out_tsk;
+
+ if (request == PTRACE_ATTACH) {
+ ret = ptrace_attach(child);
+ goto out_tsk;
+ }
+ ret = ptrace_check_attach(child, request == PTRACE_KILL);
+ if (ret == 0)
+ ret = do_ptrace(request, child, addr, data);
+
+out_tsk:
+ put_task_struct(child);
+out:
+ unlock_kernel();
+ return ret;
+}
+
+asmlinkage void syscall_trace(int why, struct pt_regs *regs)
+{
+ unsigned long ip;
+
+ if (!test_thread_flag(TIF_SYSCALL_TRACE))
+ return;
+ if (!(current->ptrace & PT_PTRACED))
+ return;
+
+ /*
+ * Save IP. IP is used to denote syscall entry/exit:
+ * IP = 0 -> entry, = 1 -> exit
+ */
+ ip = regs->ARM_ip;
+ regs->ARM_ip = why;
+
+ /* the 0x80 provides a way for the tracing parent to distinguish
+ between a syscall stop and SIGTRAP delivery */
+ ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+ ? 0x80 : 0));
+ /*
+ * this isn't the same as continuing with a signal, but it will do
+ * for normal use. strace only continues with a signal if the
+ * stopping signal is not SIGTRAP. -brl
+ */
+ if (current->exit_code) {
+ send_sig(current->exit_code, current, 1);
+ current->exit_code = 0;
+ }
+ regs->ARM_ip = ip;
+}
diff --git a/arch/arm26/kernel/ptrace.h b/arch/arm26/kernel/ptrace.h
new file mode 100644
index 0000000..846c9d8
--- /dev/null
+++ b/arch/arm26/kernel/ptrace.h
@@ -0,0 +1,13 @@
+/*
+ * linux/arch/arm26/kernel/ptrace.h
+ *
+ * Copyright (C) 2000-2003 Russell King
+ * Copyright (C) 2003 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+extern void ptrace_cancel_bpt(struct task_struct *);
+extern void ptrace_set_bpt(struct task_struct *);
+extern void ptrace_break(struct task_struct *, struct pt_regs *);
diff --git a/arch/arm26/kernel/semaphore.c b/arch/arm26/kernel/semaphore.c
new file mode 100644
index 0000000..3023a53
--- /dev/null
+++ b/arch/arm26/kernel/semaphore.c
@@ -0,0 +1,223 @@
+/*
+ * ARM semaphore implementation, taken from
+ *
+ * i386 semaphore implementation.
+ *
+ * (C) Copyright 1999 Linus Torvalds
+ * (C) Copyright 2003 Ian Molton (ARM26 mods)
+ *
+ * Modified for ARM by Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+
+#include <asm/semaphore.h>
+
+/*
+ * Semaphores are implemented using a two-way counter:
+ * The "count" variable is decremented for each process
+ * that tries to acquire the semaphore, while the "sleeping"
+ * variable is a count of such acquires.
+ *
+ * Notably, the inline "up()" and "down()" functions can
+ * efficiently test if they need to do any extra work (up
+ * needs to do something only if count was negative before
+ * the increment operation.
+ *
+ * "sleeping" and the contention routine ordering is
+ * protected by the semaphore spinlock.
+ *
+ * Note that these functions are only called when there is
+ * contention on the lock, and as such all this is the
+ * "non-critical" part of the whole semaphore business. The
+ * critical part is the inline stuff in <asm/semaphore.h>
+ * where we want to avoid any extra jumps and calls.
+ */
+
+/*
+ * Logic:
+ * - only on a boundary condition do we need to care. When we go
+ * from a negative count to a non-negative, we wake people up.
+ * - when we go from a non-negative count to a negative do we
+ * (a) synchronize with the "sleeper" count and (b) make sure
+ * that we're on the wakeup list before we synchronize so that
+ * we cannot lose wakeup events.
+ */
+
+void __up(struct semaphore *sem)
+{
+ wake_up(&sem->wait);
+}
+
+static DEFINE_SPINLOCK(semaphore_lock);
+
+void __sched __down(struct semaphore * sem)
+{
+ struct task_struct *tsk = current;
+ DECLARE_WAITQUEUE(wait, tsk);
+ tsk->state = TASK_UNINTERRUPTIBLE;
+ add_wait_queue_exclusive(&sem->wait, &wait);
+
+ spin_lock_irq(&semaphore_lock);
+ sem->sleepers++;
+ for (;;) {
+ int sleepers = sem->sleepers;
+
+ /*
+ * Add "everybody else" into it. They aren't
+ * playing, because we own the spinlock.
+ */
+ if (!atomic_add_negative(sleepers - 1, &sem->count)) {
+ sem->sleepers = 0;
+ break;
+ }
+ sem->sleepers = 1; /* us - see -1 above */
+ spin_unlock_irq(&semaphore_lock);
+
+ schedule();
+ tsk->state = TASK_UNINTERRUPTIBLE;
+ spin_lock_irq(&semaphore_lock);
+ }
+ spin_unlock_irq(&semaphore_lock);
+ remove_wait_queue(&sem->wait, &wait);
+ tsk->state = TASK_RUNNING;
+ wake_up(&sem->wait);
+}
+
+int __sched __down_interruptible(struct semaphore * sem)
+{
+ int retval = 0;
+ struct task_struct *tsk = current;
+ DECLARE_WAITQUEUE(wait, tsk);
+ tsk->state = TASK_INTERRUPTIBLE;
+ add_wait_queue_exclusive(&sem->wait, &wait);
+
+ spin_lock_irq(&semaphore_lock);
+ sem->sleepers ++;
+ for (;;) {
+ int sleepers = sem->sleepers;
+
+ /*
+ * With signals pending, this turns into
+ * the trylock failure case - we won't be
+ * sleeping, and we* can't get the lock as
+ * it has contention. Just correct the count
+ * and exit.
+ */
+ if (signal_pending(current)) {
+ retval = -EINTR;
+ sem->sleepers = 0;
+ atomic_add(sleepers, &sem->count);
+ break;
+ }
+
+ /*
+ * Add "everybody else" into it. They aren't
+ * playing, because we own the spinlock. The
+ * "-1" is because we're still hoping to get
+ * the lock.
+ */
+ if (!atomic_add_negative(sleepers - 1, &sem->count)) {
+ sem->sleepers = 0;
+ break;
+ }
+ sem->sleepers = 1; /* us - see -1 above */
+ spin_unlock_irq(&semaphore_lock);
+
+ schedule();
+ tsk->state = TASK_INTERRUPTIBLE;
+ spin_lock_irq(&semaphore_lock);
+ }
+ spin_unlock_irq(&semaphore_lock);
+ tsk->state = TASK_RUNNING;
+ remove_wait_queue(&sem->wait, &wait);
+ wake_up(&sem->wait);
+ return retval;
+}
+
+/*
+ * Trylock failed - make sure we correct for
+ * having decremented the count.
+ *
+ * We could have done the trylock with a
+ * single "cmpxchg" without failure cases,
+ * but then it wouldn't work on a 386.
+ */
+int __down_trylock(struct semaphore * sem)
+{
+ int sleepers;
+ unsigned long flags;
+
+ spin_lock_irqsave(&semaphore_lock, flags);
+ sleepers = sem->sleepers + 1;
+ sem->sleepers = 0;
+
+ /*
+ * Add "everybody else" and us into it. They aren't
+ * playing, because we own the spinlock.
+ */
+ if (!atomic_add_negative(sleepers, &sem->count))
+ wake_up(&sem->wait);
+
+ spin_unlock_irqrestore(&semaphore_lock, flags);
+ return 1;
+}
+
+/*
+ * The semaphore operations have a special calling sequence that
+ * allow us to do a simpler in-line version of them. These routines
+ * need to convert that sequence back into the C sequence when
+ * there is contention on the semaphore.
+ *
+ * ip contains the semaphore pointer on entry. Save the C-clobbered
+ * registers (r0 to r3 and lr), but not ip, as we use it as a return
+ * value in some cases..
+ */
+asm(" .section .sched.text , #alloc, #execinstr \n\
+ .align 5 \n\
+ .globl __down_failed \n\
+__down_failed: \n\
+ stmfd sp!, {r0 - r3, lr} \n\
+ mov r0, ip \n\
+ bl __down \n\
+ ldmfd sp!, {r0 - r3, pc}^ \n\
+ \n\
+ .align 5 \n\
+ .globl __down_interruptible_failed \n\
+__down_interruptible_failed: \n\
+ stmfd sp!, {r0 - r3, lr} \n\
+ mov r0, ip \n\
+ bl __down_interruptible \n\
+ mov ip, r0 \n\
+ ldmfd sp!, {r0 - r3, pc}^ \n\
+ \n\
+ .align 5 \n\
+ .globl __down_trylock_failed \n\
+__down_trylock_failed: \n\
+ stmfd sp!, {r0 - r3, lr} \n\
+ mov r0, ip \n\
+ bl __down_trylock \n\
+ mov ip, r0 \n\
+ ldmfd sp!, {r0 - r3, pc}^ \n\
+ \n\
+ .align 5 \n\
+ .globl __up_wakeup \n\
+__up_wakeup: \n\
+ stmfd sp!, {r0 - r3, lr} \n\
+ mov r0, ip \n\
+ bl __up \n\
+ ldmfd sp!, {r0 - r3, pc}^ \n\
+ ");
+
+EXPORT_SYMBOL(__down_failed);
+EXPORT_SYMBOL(__down_interruptible_failed);
+EXPORT_SYMBOL(__down_trylock_failed);
+EXPORT_SYMBOL(__up_wakeup);
+
diff --git a/arch/arm26/kernel/setup.c b/arch/arm26/kernel/setup.c
new file mode 100644
index 0000000..4eb329e
--- /dev/null
+++ b/arch/arm26/kernel/setup.c
@@ -0,0 +1,573 @@
+/*
+ * linux/arch/arm26/kernel/setup.c
+ *
+ * Copyright (C) 1995-2001 Russell King
+ * Copyright (C) 2003 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/utsname.h>
+#include <linux/blkdev.h>
+#include <linux/console.h>
+#include <linux/bootmem.h>
+#include <linux/seq_file.h>
+#include <linux/tty.h>
+#include <linux/init.h>
+#include <linux/root_dev.h>
+
+#include <asm/elf.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/procinfo.h>
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/tlbflush.h>
+
+#include <asm/irqchip.h>
+
+#ifndef MEM_SIZE
+#define MEM_SIZE (16*1024*1024)
+#endif
+
+#ifdef CONFIG_PREEMPT
+DEFINE_SPINLOCK(kernel_flag);
+#endif
+
+#if defined(CONFIG_FPE_NWFPE)
+char fpe_type[8];
+
+static int __init fpe_setup(char *line)
+{
+ memcpy(fpe_type, line, 8);
+ return 1;
+}
+
+__setup("fpe=", fpe_setup);
+#endif
+
+extern void paging_init(struct meminfo *);
+extern void convert_to_tag_list(struct tag *tags);
+extern void squash_mem_tags(struct tag *tag);
+extern void bootmem_init(struct meminfo *);
+extern int root_mountflags;
+extern int _stext, _text, _etext, _edata, _end;
+#ifdef CONFIG_XIP_KERNEL
+extern int _endtext, _sdata;
+#endif
+
+
+unsigned int processor_id;
+unsigned int __machine_arch_type;
+unsigned int system_rev;
+unsigned int system_serial_low;
+unsigned int system_serial_high;
+unsigned int elf_hwcap;
+unsigned int memc_ctrl_reg;
+unsigned int number_mfm_drives;
+
+struct processor processor;
+
+char elf_platform[ELF_PLATFORM_SIZE];
+
+unsigned long phys_initrd_start __initdata = 0;
+unsigned long phys_initrd_size __initdata = 0;
+static struct meminfo meminfo __initdata = { 0, };
+static struct proc_info_item proc_info;
+static const char *machine_name;
+static char command_line[COMMAND_LINE_SIZE];
+
+static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
+
+/*
+ * Standard memory resources
+ */
+static struct resource mem_res[] = {
+ { "Video RAM", 0, 0, IORESOURCE_MEM },
+ { "Kernel code", 0, 0, IORESOURCE_MEM },
+ { "Kernel data", 0, 0, IORESOURCE_MEM }
+};
+
+#define video_ram mem_res[0]
+#define kernel_code mem_res[1]
+#define kernel_data mem_res[2]
+
+static struct resource io_res[] = {
+ { "reserved", 0x3bc, 0x3be, IORESOURCE_IO | IORESOURCE_BUSY },
+ { "reserved", 0x378, 0x37f, IORESOURCE_IO | IORESOURCE_BUSY },
+ { "reserved", 0x278, 0x27f, IORESOURCE_IO | IORESOURCE_BUSY }
+};
+
+#define lp0 io_res[0]
+#define lp1 io_res[1]
+#define lp2 io_res[2]
+
+#define dump_cpu_info() do { } while (0)
+
+static void __init setup_processor(void)
+{
+ extern struct proc_info_list __proc_info_begin, __proc_info_end;
+ struct proc_info_list *list;
+
+ /*
+ * locate processor in the list of supported processor
+ * types. The linker builds this table for us from the
+ * entries in arch/arm26/mm/proc-*.S
+ */
+ for (list = &__proc_info_begin; list < &__proc_info_end ; list++)
+ if ((processor_id & list->cpu_mask) == list->cpu_val)
+ break;
+
+ /*
+ * If processor type is unrecognised, then we
+ * can do nothing...
+ */
+ if (list >= &__proc_info_end) {
+ printk("CPU configuration botched (ID %08x), unable "
+ "to continue.\n", processor_id);
+ while (1);
+ }
+
+ proc_info = *list->info;
+ processor = *list->proc;
+
+
+ printk("CPU: %s %s revision %d\n",
+ proc_info.manufacturer, proc_info.cpu_name,
+ (int)processor_id & 15);
+
+ dump_cpu_info();
+
+ sprintf(system_utsname.machine, "%s", list->arch_name);
+ sprintf(elf_platform, "%s", list->elf_name);
+ elf_hwcap = list->elf_hwcap;
+
+ cpu_proc_init();
+}
+
+/*
+ * Initial parsing of the command line. We need to pick out the
+ * memory size. We look for mem=size@start, where start and size
+ * are "size[KkMm]"
+ */
+static void __init
+parse_cmdline(struct meminfo *mi, char **cmdline_p, char *from)
+{
+ char c = ' ', *to = command_line;
+ int usermem = 0, len = 0;
+
+ for (;;) {
+ if (c == ' ' && !memcmp(from, "mem=", 4)) {
+ unsigned long size, start;
+
+ if (to != command_line)
+ to -= 1;
+
+ /*
+ * If the user specifies memory size, we
+ * blow away any automatically generated
+ * size.
+ */
+ if (usermem == 0) {
+ usermem = 1;
+ mi->nr_banks = 0;
+ }
+
+ start = PHYS_OFFSET;
+ size = memparse(from + 4, &from);
+ if (*from == '@')
+ start = memparse(from + 1, &from);
+
+ mi->bank[mi->nr_banks].start = start;
+ mi->bank[mi->nr_banks].size = size;
+ mi->bank[mi->nr_banks].node = PHYS_TO_NID(start);
+ mi->nr_banks += 1;
+ }
+ c = *from++;
+ if (!c)
+ break;
+ if (COMMAND_LINE_SIZE <= ++len)
+ break;
+ *to++ = c;
+ }
+ *to = '\0';
+ *cmdline_p = command_line;
+}
+
+static void __init
+setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
+{
+#ifdef CONFIG_BLK_DEV_RAM
+ extern int rd_size, rd_image_start, rd_prompt, rd_doload;
+
+ rd_image_start = image_start;
+ rd_prompt = prompt;
+ rd_doload = doload;
+
+ if (rd_sz)
+ rd_size = rd_sz;
+#endif
+}
+
+static void __init
+request_standard_resources(struct meminfo *mi)
+{
+ struct resource *res;
+ int i;
+
+ kernel_code.start = init_mm.start_code;
+ kernel_code.end = init_mm.end_code - 1;
+#ifdef CONFIG_XIP_KERNEL
+ kernel_data.start = init_mm.start_data;
+#else
+ kernel_data.start = init_mm.end_code;
+#endif
+ kernel_data.end = init_mm.brk - 1;
+
+ for (i = 0; i < mi->nr_banks; i++) {
+ unsigned long virt_start, virt_end;
+
+ if (mi->bank[i].size == 0)
+ continue;
+
+ virt_start = mi->bank[i].start;
+ virt_end = virt_start + mi->bank[i].size - 1;
+
+ res = alloc_bootmem_low(sizeof(*res));
+ res->name = "System RAM";
+ res->start = virt_start;
+ res->end = virt_end;
+ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+
+ request_resource(&iomem_resource, res);
+
+ if (kernel_code.start >= res->start &&
+ kernel_code.end <= res->end)
+ request_resource(res, &kernel_code);
+ if (kernel_data.start >= res->start &&
+ kernel_data.end <= res->end)
+ request_resource(res, &kernel_data);
+ }
+
+/* FIXME - needed? if (mdesc->video_start) {
+ video_ram.start = mdesc->video_start;
+ video_ram.end = mdesc->video_end;
+ request_resource(&iomem_resource, &video_ram);
+ }*/
+
+ /*
+ * Some machines don't have the possibility of ever
+ * possessing lp1 or lp2
+ */
+ if (0) /* FIXME - need to do this for A5k at least */
+ request_resource(&ioport_resource, &lp0);
+}
+
+/*
+ * Tag parsing.
+ *
+ * This is the new way of passing data to the kernel at boot time. Rather
+ * than passing a fixed inflexible structure to the kernel, we pass a list
+ * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE
+ * tag for the list to be recognised (to distinguish the tagged list from
+ * a param_struct). The list is terminated with a zero-length tag (this tag
+ * is not parsed in any way).
+ */
+static int __init parse_tag_core(const struct tag *tag)
+{
+ if (tag->hdr.size > 2) {
+ if ((tag->u.core.flags & 1) == 0)
+ root_mountflags &= ~MS_RDONLY;
+ ROOT_DEV = old_decode_dev(tag->u.core.rootdev);
+ }
+ return 0;
+}
+
+__tagtable(ATAG_CORE, parse_tag_core);
+
+static int __init parse_tag_mem32(const struct tag *tag)
+{
+ if (meminfo.nr_banks >= NR_BANKS) {
+ printk(KERN_WARNING
+ "Ignoring memory bank 0x%08x size %dKB\n",
+ tag->u.mem.start, tag->u.mem.size / 1024);
+ return -EINVAL;
+ }
+ meminfo.bank[meminfo.nr_banks].start = tag->u.mem.start;
+ meminfo.bank[meminfo.nr_banks].size = tag->u.mem.size;
+ meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(tag->u.mem.start);
+ meminfo.nr_banks += 1;
+
+ return 0;
+}
+
+__tagtable(ATAG_MEM, parse_tag_mem32);
+
+#if defined(CONFIG_DUMMY_CONSOLE)
+struct screen_info screen_info = {
+ .orig_video_lines = 30,
+ .orig_video_cols = 80,
+ .orig_video_mode = 0,
+ .orig_video_ega_bx = 0,
+ .orig_video_isVGA = 1,
+ .orig_video_points = 8
+};
+
+static int __init parse_tag_videotext(const struct tag *tag)
+{
+ screen_info.orig_x = tag->u.videotext.x;
+ screen_info.orig_y = tag->u.videotext.y;
+ screen_info.orig_video_page = tag->u.videotext.video_page;
+ screen_info.orig_video_mode = tag->u.videotext.video_mode;
+ screen_info.orig_video_cols = tag->u.videotext.video_cols;
+ screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
+ screen_info.orig_video_lines = tag->u.videotext.video_lines;
+ screen_info.orig_video_isVGA = tag->u.videotext.video_isvga;
+ screen_info.orig_video_points = tag->u.videotext.video_points;
+ return 0;
+}
+
+__tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
+#endif
+
+static int __init parse_tag_acorn(const struct tag *tag)
+{
+ memc_ctrl_reg = tag->u.acorn.memc_control_reg;
+ number_mfm_drives = tag->u.acorn.adfsdrives;
+ return 0;
+}
+
+__tagtable(ATAG_ACORN, parse_tag_acorn);
+
+static int __init parse_tag_ramdisk(const struct tag *tag)
+{
+ setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
+ (tag->u.ramdisk.flags & 2) == 0,
+ tag->u.ramdisk.start, tag->u.ramdisk.size);
+ return 0;
+}
+
+__tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
+
+static int __init parse_tag_initrd(const struct tag *tag)
+{
+ printk(KERN_WARNING "ATAG_INITRD is deprecated; please update your bootloader. \n");
+ phys_initrd_start = (unsigned long)tag->u.initrd.start;
+ phys_initrd_size = (unsigned long)tag->u.initrd.size;
+ return 0;
+}
+
+__tagtable(ATAG_INITRD, parse_tag_initrd);
+
+static int __init parse_tag_initrd2(const struct tag *tag)
+{
+ printk(KERN_WARNING "ATAG_INITRD is deprecated; please update your bootloader. \n");
+ phys_initrd_start = (unsigned long)tag->u.initrd.start;
+ phys_initrd_size = (unsigned long)tag->u.initrd.size;
+ return 0;
+}
+
+__tagtable(ATAG_INITRD2, parse_tag_initrd2);
+
+static int __init parse_tag_serialnr(const struct tag *tag)
+{
+ system_serial_low = tag->u.serialnr.low;
+ system_serial_high = tag->u.serialnr.high;
+ return 0;
+}
+
+__tagtable(ATAG_SERIAL, parse_tag_serialnr);
+
+static int __init parse_tag_revision(const struct tag *tag)
+{
+ system_rev = tag->u.revision.rev;
+ return 0;
+}
+
+__tagtable(ATAG_REVISION, parse_tag_revision);
+
+static int __init parse_tag_cmdline(const struct tag *tag)
+{
+ strncpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
+ default_command_line[COMMAND_LINE_SIZE - 1] = '\0';
+ return 0;
+}
+
+__tagtable(ATAG_CMDLINE, parse_tag_cmdline);
+
+/*
+ * Scan the tag table for this tag, and call its parse function.
+ * The tag table is built by the linker from all the __tagtable
+ * declarations.
+ */
+static int __init parse_tag(const struct tag *tag)
+{
+ extern struct tagtable __tagtable_begin, __tagtable_end;
+ struct tagtable *t;
+
+ for (t = &__tagtable_begin; t < &__tagtable_end; t++)
+ if (tag->hdr.tag == t->tag) {
+ t->parse(tag);
+ break;
+ }
+
+ return t < &__tagtable_end;
+}
+
+/*
+ * Parse all tags in the list, checking both the global and architecture
+ * specific tag tables.
+ */
+static void __init parse_tags(const struct tag *t)
+{
+ for (; t->hdr.size; t = tag_next(t))
+ if (!parse_tag(t))
+ printk(KERN_WARNING
+ "Ignoring unrecognised tag 0x%08x\n",
+ t->hdr.tag);
+}
+
+/*
+ * This holds our defaults.
+ */
+static struct init_tags {
+ struct tag_header hdr1;
+ struct tag_core core;
+ struct tag_header hdr2;
+ struct tag_mem32 mem;
+ struct tag_header hdr3;
+} init_tags __initdata = {
+ { tag_size(tag_core), ATAG_CORE },
+ { 1, PAGE_SIZE, 0xff },
+ { tag_size(tag_mem32), ATAG_MEM },
+ { MEM_SIZE, PHYS_OFFSET },
+ { 0, ATAG_NONE }
+};
+
+void __init setup_arch(char **cmdline_p)
+{
+ struct tag *tags = (struct tag *)&init_tags;
+ char *from = default_command_line;
+
+ setup_processor();
+ if(machine_arch_type == MACH_TYPE_A5K)
+ machine_name = "A5000";
+ else if(machine_arch_type == MACH_TYPE_ARCHIMEDES)
+ machine_name = "Archimedes";
+ else
+ machine_name = "UNKNOWN";
+
+ //FIXME - the tag struct is always copied here but this is a block
+ // of RAM that is accidentally reserved along with video RAM. perhaps
+ // it would be a good idea to explicitly reserve this?
+
+ tags = (struct tag *)0x0207c000;
+
+ /*
+ * If we have the old style parameters, convert them to
+ * a tag list.
+ */
+ if (tags->hdr.tag != ATAG_CORE)
+ convert_to_tag_list(tags);
+ if (tags->hdr.tag != ATAG_CORE)
+ tags = (struct tag *)&init_tags;
+ if (tags->hdr.tag == ATAG_CORE) {
+ if (meminfo.nr_banks != 0)
+ squash_mem_tags(tags);
+ parse_tags(tags);
+ }
+
+ init_mm.start_code = (unsigned long) &_text;
+#ifndef CONFIG_XIP_KERNEL
+ init_mm.end_code = (unsigned long) &_etext;
+#else
+ init_mm.end_code = (unsigned long) &_endtext;
+ init_mm.start_data = (unsigned long) &_sdata;
+#endif
+ init_mm.end_data = (unsigned long) &_edata;
+ init_mm.brk = (unsigned long) &_end;
+
+ memcpy(saved_command_line, from, COMMAND_LINE_SIZE);
+ saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
+ parse_cmdline(&meminfo, cmdline_p, from);
+ bootmem_init(&meminfo);
+ paging_init(&meminfo);
+ request_standard_resources(&meminfo);
+
+#ifdef CONFIG_VT
+#if defined(CONFIG_DUMMY_CONSOLE)
+ conswitchp = &dummy_con;
+#endif
+#endif
+}
+
+static const char *hwcap_str[] = {
+ "swp",
+ "half",
+ "thumb",
+ "26bit",
+ "fastmult",
+ "fpa",
+ "vfp",
+ "edsp",
+ NULL
+};
+
+static int c_show(struct seq_file *m, void *v)
+{
+ int i;
+
+ seq_printf(m, "Processor\t: %s %s rev %d (%s)\n",
+ proc_info.manufacturer, proc_info.cpu_name,
+ (int)processor_id & 15, elf_platform);
+
+ seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
+ loops_per_jiffy / (500000/HZ),
+ (loops_per_jiffy / (5000/HZ)) % 100);
+
+ /* dump out the processor features */
+ seq_puts(m, "Features\t: ");
+
+ for (i = 0; hwcap_str[i]; i++)
+ if (elf_hwcap & (1 << i))
+ seq_printf(m, "%s ", hwcap_str[i]);
+
+ seq_puts(m, "\n");
+
+ seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4);
+ seq_printf(m, "CPU revision\t: %d\n\n", processor_id & 15);
+ seq_printf(m, "Hardware\t: %s\n", machine_name);
+ seq_printf(m, "Revision\t: %04x\n", system_rev);
+ seq_printf(m, "Serial\t\t: %08x%08x\n",
+ system_serial_high, system_serial_low);
+
+ return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+ return *pos < 1 ? (void *)1 : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ ++*pos;
+ return NULL;
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+struct seq_operations cpuinfo_op = {
+ .start = c_start,
+ .next = c_next,
+ .stop = c_stop,
+ .show = c_show
+};
diff --git a/arch/arm26/kernel/signal.c b/arch/arm26/kernel/signal.c
new file mode 100644
index 0000000..356d980
--- /dev/null
+++ b/arch/arm26/kernel/signal.c
@@ -0,0 +1,540 @@
+/*
+ * linux/arch/arm26/kernel/signal.c
+ *
+ * Copyright (C) 1995-2002 Russell King
+ * Copyright (C) 2003 Ian Molton (ARM26)
+ *
+ * FIXME!!! This is probably very broken (13/05/2003)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/wait.h>
+#include <linux/ptrace.h>
+#include <linux/personality.h>
+#include <linux/tty.h>
+#include <linux/binfmts.h>
+#include <linux/elf.h>
+
+#include <asm/pgalloc.h>
+#include <asm/ucontext.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+
+#include "ptrace.h"
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+/*
+ * For ARM syscalls, we encode the syscall number into the instruction.
+ */
+#define SWI_SYS_SIGRETURN (0xef000000|(__NR_sigreturn))
+#define SWI_SYS_RT_SIGRETURN (0xef000000|(__NR_rt_sigreturn))
+
+static int do_signal(sigset_t *oldset, struct pt_regs * regs, int syscall);
+
+/*
+ * atomically swap in the new signal mask, and wait for a signal.
+ */
+asmlinkage int sys_sigsuspend(int restart, unsigned long oldmask, old_sigset_t mask, struct pt_regs *regs)
+{
+ sigset_t saveset;
+
+ mask &= _BLOCKABLE;
+ spin_lock_irq(&current->sighand->siglock);
+ saveset = current->blocked;
+ siginitset(&current->blocked, mask);
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+ regs->ARM_r0 = -EINTR;
+
+ while (1) {
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ if (do_signal(&saveset, regs, 0))
+ return regs->ARM_r0;
+ }
+}
+
+asmlinkage int
+sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize, struct pt_regs *regs)
+{
+ sigset_t saveset, newset;
+
+ /* XXX: Don't preclude handling different sized sigset_t's. */
+ if (sigsetsize != sizeof(sigset_t))
+ return -EINVAL;
+
+ if (copy_from_user(&newset, unewset, sizeof(newset)))
+ return -EFAULT;
+ sigdelsetmask(&newset, ~_BLOCKABLE);
+
+ spin_lock_irq(&current->sighand->siglock);
+ saveset = current->blocked;
+ current->blocked = newset;
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+ regs->ARM_r0 = -EINTR;
+
+ while (1) {
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ if (do_signal(&saveset, regs, 0))
+ return regs->ARM_r0;
+ }
+}
+
+asmlinkage int
+sys_sigaction(int sig, const struct old_sigaction *act,
+ struct old_sigaction *oact)
+{
+ struct k_sigaction new_ka, old_ka;
+ int ret;
+
+ if (act) {
+ old_sigset_t mask;
+ if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+ __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
+ __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
+ return -EFAULT;
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags);
+ __get_user(mask, &act->sa_mask);
+ siginitset(&new_ka.sa.sa_mask, mask);
+ }
+
+ ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+ if (!ret && oact) {
+ if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+ __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
+ __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
+ return -EFAULT;
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
+ }
+
+ return ret;
+}
+
+/*
+ * Do a signal return; undo the signal stack.
+ */
+struct sigframe
+{
+ struct sigcontext sc;
+ unsigned long extramask[_NSIG_WORDS-1];
+ unsigned long retcode;
+};
+
+struct rt_sigframe
+{
+ struct siginfo *pinfo;
+ void *puc;
+ struct siginfo info;
+ struct ucontext uc;
+ unsigned long retcode;
+};
+
+static int
+restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
+{
+ int err = 0;
+
+ __get_user_error(regs->ARM_r0, &sc->arm_r0, err);
+ __get_user_error(regs->ARM_r1, &sc->arm_r1, err);
+ __get_user_error(regs->ARM_r2, &sc->arm_r2, err);
+ __get_user_error(regs->ARM_r3, &sc->arm_r3, err);
+ __get_user_error(regs->ARM_r4, &sc->arm_r4, err);
+ __get_user_error(regs->ARM_r5, &sc->arm_r5, err);
+ __get_user_error(regs->ARM_r6, &sc->arm_r6, err);
+ __get_user_error(regs->ARM_r7, &sc->arm_r7, err);
+ __get_user_error(regs->ARM_r8, &sc->arm_r8, err);
+ __get_user_error(regs->ARM_r9, &sc->arm_r9, err);
+ __get_user_error(regs->ARM_r10, &sc->arm_r10, err);
+ __get_user_error(regs->ARM_fp, &sc->arm_fp, err);
+ __get_user_error(regs->ARM_ip, &sc->arm_ip, err);
+ __get_user_error(regs->ARM_sp, &sc->arm_sp, err);
+ __get_user_error(regs->ARM_lr, &sc->arm_lr, err);
+ __get_user_error(regs->ARM_pc, &sc->arm_pc, err);
+
+ err |= !valid_user_regs(regs);
+
+ return err;
+}
+
+asmlinkage int sys_sigreturn(struct pt_regs *regs)
+{
+ struct sigframe *frame;
+ sigset_t set;
+
+ /*
+ * Since we stacked the signal on a 64-bit boundary,
+ * then 'sp' should be word aligned here. If it's
+ * not, then the user is trying to mess with us.
+ */
+ if (regs->ARM_sp & 7)
+ goto badframe;
+
+ frame = (struct sigframe *)regs->ARM_sp;
+
+ if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
+ goto badframe;
+ if (__get_user(set.sig[0], &frame->sc.oldmask)
+ || (_NSIG_WORDS > 1
+ && __copy_from_user(&set.sig[1], &frame->extramask,
+ sizeof(frame->extramask))))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(&current->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ if (restore_sigcontext(regs, &frame->sc))
+ goto badframe;
+
+ /* Send SIGTRAP if we're single-stepping */
+ if (current->ptrace & PT_SINGLESTEP) {
+ ptrace_cancel_bpt(current);
+ send_sig(SIGTRAP, current, 1);
+ }
+
+ return regs->ARM_r0;
+
+badframe:
+ force_sig(SIGSEGV, current);
+ return 0;
+}
+
+asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
+{
+ struct rt_sigframe *frame;
+ sigset_t set;
+
+ /*
+ * Since we stacked the signal on a 64-bit boundary,
+ * then 'sp' should be word aligned here. If it's
+ * not, then the user is trying to mess with us.
+ */
+ if (regs->ARM_sp & 7)
+ goto badframe;
+
+ frame = (struct rt_sigframe *)regs->ARM_sp;
+
+ if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
+ goto badframe;
+ if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(&current->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
+ goto badframe;
+
+ /* Send SIGTRAP if we're single-stepping */
+ if (current->ptrace & PT_SINGLESTEP) {
+ ptrace_cancel_bpt(current);
+ send_sig(SIGTRAP, current, 1);
+ }
+
+ return regs->ARM_r0;
+
+badframe:
+ force_sig(SIGSEGV, current);
+ return 0;
+}
+
+static int
+setup_sigcontext(struct sigcontext *sc, /*struct _fpstate *fpstate,*/
+ struct pt_regs *regs, unsigned long mask)
+{
+ int err = 0;
+
+ __put_user_error(regs->ARM_r0, &sc->arm_r0, err);
+ __put_user_error(regs->ARM_r1, &sc->arm_r1, err);
+ __put_user_error(regs->ARM_r2, &sc->arm_r2, err);
+ __put_user_error(regs->ARM_r3, &sc->arm_r3, err);
+ __put_user_error(regs->ARM_r4, &sc->arm_r4, err);
+ __put_user_error(regs->ARM_r5, &sc->arm_r5, err);
+ __put_user_error(regs->ARM_r6, &sc->arm_r6, err);
+ __put_user_error(regs->ARM_r7, &sc->arm_r7, err);
+ __put_user_error(regs->ARM_r8, &sc->arm_r8, err);
+ __put_user_error(regs->ARM_r9, &sc->arm_r9, err);
+ __put_user_error(regs->ARM_r10, &sc->arm_r10, err);
+ __put_user_error(regs->ARM_fp, &sc->arm_fp, err);
+ __put_user_error(regs->ARM_ip, &sc->arm_ip, err);
+ __put_user_error(regs->ARM_sp, &sc->arm_sp, err);
+ __put_user_error(regs->ARM_lr, &sc->arm_lr, err);
+ __put_user_error(regs->ARM_pc, &sc->arm_pc, err);
+
+ __put_user_error(current->thread.trap_no, &sc->trap_no, err);
+ __put_user_error(current->thread.error_code, &sc->error_code, err);
+ __put_user_error(current->thread.address, &sc->fault_address, err);
+ __put_user_error(mask, &sc->oldmask, err);
+
+ return err;
+}
+
+static inline void *
+get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, int framesize)
+{
+ unsigned long sp = regs->ARM_sp;
+
+ /*
+ * This is the X/Open sanctioned signal stack switching.
+ */
+ if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
+ sp = current->sas_ss_sp + current->sas_ss_size;
+
+ /*
+ * ATPCS B01 mandates 8-byte alignment
+ */
+ return (void *)((sp - framesize) & ~7);
+}
+
+static int
+setup_return(struct pt_regs *regs, struct k_sigaction *ka,
+ unsigned long *rc, void *frame, int usig)
+{
+ unsigned long handler = (unsigned long)ka->sa.sa_handler;
+ unsigned long retcode;
+
+ if (ka->sa.sa_flags & SA_RESTORER) {
+ retcode = (unsigned long)ka->sa.sa_restorer;
+ } else {
+
+ if (__put_user((ka->sa.sa_flags & SA_SIGINFO)?SWI_SYS_RT_SIGRETURN:SWI_SYS_SIGRETURN, rc))
+ return 1;
+
+ retcode = ((unsigned long)rc);
+ }
+
+ regs->ARM_r0 = usig;
+ regs->ARM_sp = (unsigned long)frame;
+ regs->ARM_lr = retcode;
+ regs->ARM_pc = handler & ~3;
+
+ return 0;
+}
+
+static int
+setup_frame(int usig, struct k_sigaction *ka, sigset_t *set, struct pt_regs *regs)
+{
+ struct sigframe *frame = get_sigframe(ka, regs, sizeof(*frame));
+ int err = 0;
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ return 1;
+
+ err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
+
+ if (_NSIG_WORDS > 1) {
+ err |= __copy_to_user(frame->extramask, &set->sig[1],
+ sizeof(frame->extramask));
+ }
+
+ if (err == 0)
+ err = setup_return(regs, ka, &frame->retcode, frame, usig);
+
+ return err;
+}
+
+static int
+setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
+ sigset_t *set, struct pt_regs *regs)
+{
+ struct rt_sigframe *frame = get_sigframe(ka, regs, sizeof(*frame));
+ int err = 0;
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ return 1;
+
+ __put_user_error(&frame->info, &frame->pinfo, err);
+ __put_user_error(&frame->uc, &frame->puc, err);
+ err |= copy_siginfo_to_user(&frame->info, info);
+
+ /* Clear all the bits of the ucontext we don't use. */
+ err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
+
+ err |= setup_sigcontext(&frame->uc.uc_mcontext, /*&frame->fpstate,*/
+ regs, set->sig[0]);
+ err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+
+ if (err == 0)
+ err = setup_return(regs, ka, &frame->retcode, frame, usig);
+
+ if (err == 0) {
+ /*
+ * For realtime signals we must also set the second and third
+ * arguments for the signal handler.
+ * -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
+ */
+ regs->ARM_r1 = (unsigned long)frame->pinfo;
+ regs->ARM_r2 = (unsigned long)frame->puc;
+ }
+
+ return err;
+}
+
+static inline void restart_syscall(struct pt_regs *regs)
+{
+ regs->ARM_r0 = regs->ARM_ORIG_r0;
+ regs->ARM_pc -= 4;
+}
+
+/*
+ * OK, we're invoking a handler
+ */
+static void
+handle_signal(unsigned long sig, siginfo_t *info, sigset_t *oldset,
+ struct pt_regs * regs, int syscall)
+{
+ struct thread_info *thread = current_thread_info();
+ struct task_struct *tsk = current;
+ struct k_sigaction *ka = &tsk->sighand->action[sig-1];
+ int usig = sig;
+ int ret;
+
+ /*
+ * If we were from a system call, check for system call restarting...
+ */
+ if (syscall) {
+ switch (regs->ARM_r0) {
+ case -ERESTART_RESTARTBLOCK:
+ current_thread_info()->restart_block.fn =
+ do_no_restart_syscall;
+ case -ERESTARTNOHAND:
+ regs->ARM_r0 = -EINTR;
+ break;
+ case -ERESTARTSYS:
+ if (!(ka->sa.sa_flags & SA_RESTART)) {
+ regs->ARM_r0 = -EINTR;
+ break;
+ }
+ /* fallthrough */
+ case -ERESTARTNOINTR:
+ restart_syscall(regs);
+ }
+ }
+
+ /*
+ * translate the signal
+ */
+ if (usig < 32 && thread->exec_domain && thread->exec_domain->signal_invmap)
+ usig = thread->exec_domain->signal_invmap[usig];
+
+ /*
+ * Set up the stack frame
+ */
+ if (ka->sa.sa_flags & SA_SIGINFO)
+ ret = setup_rt_frame(usig, ka, info, oldset, regs);
+ else
+ ret = setup_frame(usig, ka, oldset, regs);
+
+ /*
+ * Check that the resulting registers are actually sane.
+ */
+ ret |= !valid_user_regs(regs);
+
+ if (ret == 0) {
+ if (ka->sa.sa_flags & SA_ONESHOT)
+ ka->sa.sa_handler = SIG_DFL;
+
+ if (!(ka->sa.sa_flags & SA_NODEFER)) {
+ spin_lock_irq(&tsk->sighand->siglock);
+ sigorsets(&tsk->blocked, &tsk->blocked,
+ &ka->sa.sa_mask);
+ sigaddset(&tsk->blocked, sig);
+ recalc_sigpending();
+ spin_unlock_irq(&tsk->sighand->siglock);
+ }
+ return;
+ }
+
+ force_sigsegv(sig, tsk);
+}
+
+/*
+ * Note that 'init' is a special process: it doesn't get signals it doesn't
+ * want to handle. Thus you cannot kill init even with a SIGKILL even by
+ * mistake.
+ *
+ * Note that we go through the signals twice: once to check the signals that
+ * the kernel can handle, and then we build all the user-level signal handling
+ * stack-frames in one go after that.
+ */
+static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
+{
+ siginfo_t info;
+ int signr;
+
+ /*
+ * We want the common case to go fast, which
+ * is why we may in certain cases get here from
+ * kernel mode. Just return without doing anything
+ * if so.
+ */
+ if (!user_mode(regs))
+ return 0;
+
+ if (current->ptrace & PT_SINGLESTEP)
+ ptrace_cancel_bpt(current);
+
+ signr = get_signal_to_deliver(&info, regs, NULL);
+ if (signr > 0) {
+ handle_signal(signr, &info, oldset, regs, syscall);
+ if (current->ptrace & PT_SINGLESTEP)
+ ptrace_set_bpt(current);
+ return 1;
+ }
+
+ /*
+ * No signal to deliver to the process - restart the syscall.
+ */
+ if (syscall) {
+ if (regs->ARM_r0 == -ERESTART_RESTARTBLOCK) {
+ u32 *usp;
+
+ regs->ARM_sp -= 12;
+ usp = (u32 *)regs->ARM_sp;
+
+ put_user(regs->ARM_pc, &usp[0]);
+ /* swi __NR_restart_syscall */
+ put_user(0xef000000 | __NR_restart_syscall, &usp[1]);
+ /* ldr pc, [sp], #12 */
+// FIXME!!! is #12 correct there?
+ put_user(0xe49df00c, &usp[2]);
+
+ regs->ARM_pc = regs->ARM_sp + 4;
+ }
+ if (regs->ARM_r0 == -ERESTARTNOHAND ||
+ regs->ARM_r0 == -ERESTARTSYS ||
+ regs->ARM_r0 == -ERESTARTNOINTR) {
+ restart_syscall(regs);
+ }
+ }
+ if (current->ptrace & PT_SINGLESTEP)
+ ptrace_set_bpt(current);
+ return 0;
+}
+
+asmlinkage void
+do_notify_resume(struct pt_regs *regs, unsigned int thread_flags, int syscall)
+{
+ if (thread_flags & _TIF_SIGPENDING)
+ do_signal(&current->blocked, regs, syscall);
+}
diff --git a/arch/arm26/kernel/sys_arm.c b/arch/arm26/kernel/sys_arm.c
new file mode 100644
index 0000000..e7edd20
--- /dev/null
+++ b/arch/arm26/kernel/sys_arm.c
@@ -0,0 +1,324 @@
+/*
+ * linux/arch/arm26/kernel/sys_arm.c
+ *
+ * Copyright (C) People who wrote linux/arch/i386/kernel/sys_i386.c
+ * Copyright (C) 1995, 1996 Russell King.
+ * Copyright (C) 2003 Ian Molton.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the Linux/arm
+ * platform.
+ */
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/syscalls.h>
+#include <linux/mman.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+
+#include <asm/uaccess.h>
+#include <asm/ipc.h>
+
+extern unsigned long do_mremap(unsigned long addr, unsigned long old_len,
+ unsigned long new_len, unsigned long flags,
+ unsigned long new_addr);
+
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way unix traditionally does this, though.
+ */
+asmlinkage int sys_pipe(unsigned long * fildes)
+{
+ int fd[2];
+ int error;
+
+ error = do_pipe(fd);
+ if (!error) {
+ if (copy_to_user(fildes, fd, 2*sizeof(int)))
+ error = -EFAULT;
+ }
+ return error;
+}
+
+/* common code for old and new mmaps */
+inline long do_mmap2(
+ unsigned long addr, unsigned long len,
+ unsigned long prot, unsigned long flags,
+ unsigned long fd, unsigned long pgoff)
+{
+ int error = -EINVAL;
+ struct file * file = NULL;
+
+ flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+
+ /*
+ * If we are doing a fixed mapping, and address < PAGE_SIZE,
+ * then deny it.
+ */
+ if (flags & MAP_FIXED && addr < PAGE_SIZE && vectors_base() == 0)
+ goto out;
+
+ error = -EBADF;
+ if (!(flags & MAP_ANONYMOUS)) {
+ file = fget(fd);
+ if (!file)
+ goto out;
+ }
+
+ down_write(&current->mm->mmap_sem);
+ error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+ up_write(&current->mm->mmap_sem);
+
+ if (file)
+ fput(file);
+out:
+ return error;
+}
+
+struct mmap_arg_struct {
+ unsigned long addr;
+ unsigned long len;
+ unsigned long prot;
+ unsigned long flags;
+ unsigned long fd;
+ unsigned long offset;
+};
+
+asmlinkage int old_mmap(struct mmap_arg_struct *arg)
+{
+ int error = -EFAULT;
+ struct mmap_arg_struct a;
+
+ if (copy_from_user(&a, arg, sizeof(a)))
+ goto out;
+
+ error = -EINVAL;
+ if (a.offset & ~PAGE_MASK)
+ goto out;
+
+ error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
+out:
+ return error;
+}
+
+asmlinkage unsigned long
+sys_arm_mremap(unsigned long addr, unsigned long old_len,
+ unsigned long new_len, unsigned long flags,
+ unsigned long new_addr)
+{
+ unsigned long ret = -EINVAL;
+
+ /*
+ * If we are doing a fixed mapping, and address < PAGE_SIZE,
+ * then deny it.
+ */
+ if (flags & MREMAP_FIXED && new_addr < PAGE_SIZE &&
+ vectors_base() == 0)
+ goto out;
+
+ down_write(&current->mm->mmap_sem);
+ ret = do_mremap(addr, old_len, new_len, flags, new_addr);
+ up_write(&current->mm->mmap_sem);
+
+out:
+ return ret;
+}
+
+/*
+ * Perform the select(nd, in, out, ex, tv) and mmap() system
+ * calls.
+ */
+
+struct sel_arg_struct {
+ unsigned long n;
+ fd_set *inp, *outp, *exp;
+ struct timeval *tvp;
+};
+
+asmlinkage int old_select(struct sel_arg_struct *arg)
+{
+ struct sel_arg_struct a;
+
+ if (copy_from_user(&a, arg, sizeof(a)))
+ return -EFAULT;
+ /* sys_select() does the appropriate kernel locking */
+ return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
+}
+
+/*
+ * sys_ipc() is the de-multiplexer for the SysV IPC calls..
+ *
+ * This is really horribly ugly.
+ */
+asmlinkage int sys_ipc (uint call, int first, int second, int third, void *ptr, long fifth)
+{
+ int version, ret;
+
+ version = call >> 16; /* hack for backward compatibility */
+ call &= 0xffff;
+
+ switch (call) {
+ case SEMOP:
+ return sys_semop (first, (struct sembuf *)ptr, second);
+ case SEMGET:
+ return sys_semget (first, second, third);
+ case SEMCTL: {
+ union semun fourth;
+ if (!ptr)
+ return -EINVAL;
+ if (get_user(fourth.__pad, (void **) ptr))
+ return -EFAULT;
+ return sys_semctl (first, second, third, fourth);
+ }
+
+ case MSGSND:
+ return sys_msgsnd (first, (struct msgbuf *) ptr,
+ second, third);
+ case MSGRCV:
+ switch (version) {
+ case 0: {
+ struct ipc_kludge tmp;
+ if (!ptr)
+ return -EINVAL;
+ if (copy_from_user(&tmp,(struct ipc_kludge *) ptr,
+ sizeof (tmp)))
+ return -EFAULT;
+ return sys_msgrcv (first, tmp.msgp, second,
+ tmp.msgtyp, third);
+ }
+ default:
+ return sys_msgrcv (first,
+ (struct msgbuf *) ptr,
+ second, fifth, third);
+ }
+ case MSGGET:
+ return sys_msgget ((key_t) first, second);
+ case MSGCTL:
+ return sys_msgctl (first, second, (struct msqid_ds *) ptr);
+
+ case SHMAT:
+ switch (version) {
+ default: {
+ ulong raddr;
+ ret = do_shmat (first, (char *) ptr, second, &raddr);
+ if (ret)
+ return ret;
+ return put_user (raddr, (ulong *) third);
+ }
+ case 1: /* iBCS2 emulator entry point */
+ if (!segment_eq(get_fs(), get_ds()))
+ return -EINVAL;
+ return do_shmat (first, (char *) ptr,
+ second, (ulong *) third);
+ }
+ case SHMDT:
+ return sys_shmdt ((char *)ptr);
+ case SHMGET:
+ return sys_shmget (first, second, third);
+ case SHMCTL:
+ return sys_shmctl (first, second,
+ (struct shmid_ds *) ptr);
+ default:
+ return -EINVAL;
+ }
+}
+
+/* Fork a new task - this creates a new program thread.
+ * This is called indirectly via a small wrapper
+ */
+asmlinkage int sys_fork(struct pt_regs *regs)
+{
+ return do_fork(SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL);
+}
+
+/* Clone a task - this clones the calling program thread.
+ * This is called indirectly via a small wrapper
+ */
+asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, struct pt_regs *regs)
+{
+ /*
+ * We don't support SETTID / CLEARTID (FIXME!!! (nicked from arm32))
+ */
+ if (clone_flags & (CLONE_PARENT_SETTID | CLONE_CHILD_CLEARTID))
+ return -EINVAL;
+
+ if (!newsp)
+ newsp = regs->ARM_sp;
+
+ return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
+}
+
+asmlinkage int sys_vfork(struct pt_regs *regs)
+{
+ return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL);
+}
+
+/* sys_execve() executes a new program.
+ * This is called indirectly via a small wrapper
+ */
+asmlinkage int sys_execve(char *filenamei, char **argv, char **envp, struct pt_regs *regs)
+{
+ int error;
+ char * filename;
+
+ filename = getname(filenamei);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename))
+ goto out;
+ error = do_execve(filename, argv, envp, regs);
+ putname(filename);
+out:
+ return error;
+}
+
+/* FIXME - see if this is correct for arm26 */
+long execve(const char *filename, char **argv, char **envp)
+{
+ struct pt_regs regs;
+ int ret;
+ memset(&regs, 0, sizeof(struct pt_regs));
+ ret = do_execve((char *)filename, (char __user * __user *)argv, (char __user * __user *)envp, &regs);
+ if (ret < 0)
+ goto out;
+
+ /*
+ * Save argc to the register structure for userspace.
+ */
+ regs.ARM_r0 = ret;
+
+ /*
+ * We were successful. We won't be returning to our caller, but
+ * instead to user space by manipulating the kernel stack.
+ */
+ asm( "add r0, %0, %1\n\t"
+ "mov r1, %2\n\t"
+ "mov r2, %3\n\t"
+ "bl memmove\n\t" /* copy regs to top of stack */
+ "mov r8, #0\n\t" /* not a syscall */
+ "mov r9, %0\n\t" /* thread structure */
+ "mov sp, r0\n\t" /* reposition stack pointer */
+ "b ret_to_user"
+ :
+ : "r" (current_thread_info()),
+ "Ir" (THREAD_SIZE - 8 - sizeof(regs)),
+ "r" (&regs),
+ "Ir" (sizeof(regs))
+ : "r0", "r1", "r2", "r3", "ip", "memory");
+
+ out:
+ return ret;
+}
+
+EXPORT_SYMBOL(execve);
diff --git a/arch/arm26/kernel/time.c b/arch/arm26/kernel/time.c
new file mode 100644
index 0000000..549a6b2
--- /dev/null
+++ b/arch/arm26/kernel/time.c
@@ -0,0 +1,234 @@
+/*
+ * linux/arch/arm26/kernel/time.c
+ *
+ * Copyright (C) 1991, 1992, 1995 Linus Torvalds
+ * Modifications for ARM (C) 1994-2001 Russell King
+ * Mods for ARM26 (C) 2003 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This file contains the ARM-specific time handling details:
+ * reading the RTC at bootup, etc...
+ *
+ * 1994-07-02 Alan Modra
+ * fixed set_rtc_mmss, fixed time.year for >= 2000, new mktime
+ * 1998-12-20 Updated NTP code according to technical memorandum Jan '96
+ * "A Kernel Model for Precision Timekeeping" by Dave Mills
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/time.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/timex.h>
+#include <linux/errno.h>
+#include <linux/profile.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/ioc.h>
+
+u64 jiffies_64 = INITIAL_JIFFIES;
+
+EXPORT_SYMBOL(jiffies_64);
+
+extern unsigned long wall_jiffies;
+
+/* this needs a better home */
+DEFINE_SPINLOCK(rtc_lock);
+
+/* change this if you have some constant time drift */
+#define USECS_PER_JIFFY (1000000/HZ)
+
+static int dummy_set_rtc(void)
+{
+ return 0;
+}
+
+/*
+ * hook for setting the RTC's idea of the current time.
+ */
+int (*set_rtc)(void) = dummy_set_rtc;
+
+/*
+ * Get time offset based on IOCs timer.
+ * FIXME - if this is called with interrutps off, why the shennanigans
+ * below ?
+ */
+static unsigned long gettimeoffset(void)
+{
+ unsigned int count1, count2, status;
+ long offset;
+
+ ioc_writeb (0, IOC_T0LATCH);
+ barrier ();
+ count1 = ioc_readb(IOC_T0CNTL) | (ioc_readb(IOC_T0CNTH) << 8);
+ barrier ();
+ status = ioc_readb(IOC_IRQREQA);
+ barrier ();
+ ioc_writeb (0, IOC_T0LATCH);
+ barrier ();
+ count2 = ioc_readb(IOC_T0CNTL) | (ioc_readb(IOC_T0CNTH) << 8);
+
+ offset = count2;
+ if (count2 < count1) {
+ /*
+ * We have not had an interrupt between reading count1
+ * and count2.
+ */
+ if (status & (1 << 5))
+ offset -= LATCH;
+ } else if (count2 > count1) {
+ /*
+ * We have just had another interrupt between reading
+ * count1 and count2.
+ */
+ offset -= LATCH;
+ }
+
+ offset = (LATCH - offset) * (tick_nsec / 1000);
+ return (offset + LATCH/2) / LATCH;
+}
+
+/*
+ * Scheduler clock - returns current time in nanosec units.
+ */
+unsigned long long sched_clock(void)
+{
+ return (unsigned long long)jiffies * (1000000000 / HZ);
+}
+
+static unsigned long next_rtc_update;
+
+/*
+ * If we have an externally synchronized linux clock, then update
+ * CMOS clock accordingly every ~11 minutes. set_rtc() has to be
+ * called as close as possible to 500 ms before the new second
+ * starts.
+ */
+static inline void do_set_rtc(void)
+{
+ if (time_status & STA_UNSYNC || set_rtc == NULL)
+ return;
+
+//FIXME - timespec.tv_sec is a time_t not unsigned long
+ if (next_rtc_update &&
+ time_before((unsigned long)xtime.tv_sec, next_rtc_update))
+ return;
+
+ if (xtime.tv_nsec < 500000000 - ((unsigned) tick_nsec >> 1) &&
+ xtime.tv_nsec >= 500000000 + ((unsigned) tick_nsec >> 1))
+ return;
+
+ if (set_rtc())
+ /*
+ * rtc update failed. Try again in 60s
+ */
+ next_rtc_update = xtime.tv_sec + 60;
+ else
+ next_rtc_update = xtime.tv_sec + 660;
+}
+
+#define do_leds()
+
+void do_gettimeofday(struct timeval *tv)
+{
+ unsigned long flags;
+ unsigned long seq;
+ unsigned long usec, sec, lost;
+
+ do {
+ seq = read_seqbegin_irqsave(&xtime_lock, flags);
+ usec = gettimeoffset();
+
+ lost = jiffies - wall_jiffies;
+ if (lost)
+ usec += lost * USECS_PER_JIFFY;
+
+ sec = xtime.tv_sec;
+ usec += xtime.tv_nsec / 1000;
+ } while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
+
+ /* usec may have gone up a lot: be safe */
+ while (usec >= 1000000) {
+ usec -= 1000000;
+ sec++;
+ }
+
+ tv->tv_sec = sec;
+ tv->tv_usec = usec;
+}
+
+EXPORT_SYMBOL(do_gettimeofday);
+
+int do_settimeofday(struct timespec *tv)
+{
+ if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
+ return -EINVAL;
+
+ write_seqlock_irq(&xtime_lock);
+ /*
+ * This is revolting. We need to set "xtime" correctly. However, the
+ * value in this location is the value at the most recent update of
+ * wall time. Discover what correction gettimeofday() would have
+ * done, and then undo it!
+ */
+ tv->tv_nsec -= 1000 * (gettimeoffset() +
+ (jiffies - wall_jiffies) * USECS_PER_JIFFY);
+
+ while (tv->tv_nsec < 0) {
+ tv->tv_nsec += NSEC_PER_SEC;
+ tv->tv_sec--;
+ }
+
+ xtime.tv_sec = tv->tv_sec;
+ xtime.tv_nsec = tv->tv_nsec;
+ time_adjust = 0; /* stop active adjtime() */
+ time_status |= STA_UNSYNC;
+ time_maxerror = NTP_PHASE_LIMIT;
+ time_esterror = NTP_PHASE_LIMIT;
+ write_sequnlock_irq(&xtime_lock);
+ clock_was_set();
+ return 0;
+}
+
+EXPORT_SYMBOL(do_settimeofday);
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ do_timer(regs);
+#ifndef CONFIG_SMP
+ update_process_times(user_mode(regs));
+#endif
+ do_set_rtc(); //FIME - EVERY timer IRQ?
+ profile_tick(CPU_PROFILING, regs);
+ return IRQ_HANDLED; //FIXME - is this right?
+}
+
+static struct irqaction timer_irq = {
+ .name = "timer",
+ .flags = SA_INTERRUPT,
+ .handler = timer_interrupt,
+};
+
+extern void ioctime_init(void);
+
+/*
+ * Set up timer interrupt.
+ */
+void __init time_init(void)
+{
+ ioc_writeb(LATCH & 255, IOC_T0LTCHL);
+ ioc_writeb(LATCH >> 8, IOC_T0LTCHH);
+ ioc_writeb(0, IOC_T0GO);
+
+
+ setup_irq(IRQ_TIMER, &timer_irq);
+}
+
diff --git a/arch/arm26/kernel/traps.c b/arch/arm26/kernel/traps.c
new file mode 100644
index 0000000..f64f590
--- /dev/null
+++ b/arch/arm26/kernel/traps.c
@@ -0,0 +1,548 @@
+/*
+ * linux/arch/arm26/kernel/traps.c
+ *
+ * Copyright (C) 1995-2002 Russell King
+ * Fragments that appear the same as linux/arch/i386/kernel/traps.c (C) Linus Torvalds
+ * Copyright (C) 2003 Ian Molton (ARM26)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 'traps.c' handles hardware exceptions after we have saved some state in
+ * 'linux/arch/arm26/lib/traps.S'. Mostly a debugging aid, but will probably
+ * kill the offending process.
+ */
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/spinlock.h>
+#include <linux/personality.h>
+#include <linux/ptrace.h>
+#include <linux/elf.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+
+#include <asm/atomic.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+#include <asm/semaphore.h>
+
+#include "ptrace.h"
+
+extern void c_backtrace (unsigned long fp, int pmode);
+extern void show_pte(struct mm_struct *mm, unsigned long addr);
+
+const char *processor_modes[] = { "USER_26", "FIQ_26" , "IRQ_26" , "SVC_26" };
+
+static const char *handler[]= { "prefetch abort", "data abort", "address exception", "interrupt" "*bad reason*"};
+
+/*
+ * Stack pointers should always be within the kernels view of
+ * physical memory. If it is not there, then we can't dump
+ * out any information relating to the stack.
+ */
+static int verify_stack(unsigned long sp)
+{
+ if (sp < PAGE_OFFSET || (sp > (unsigned long)high_memory && high_memory != 0))
+ return -EFAULT;
+
+ return 0;
+}
+
+/*
+ * Dump out the contents of some memory nicely...
+ */
+static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
+{
+ unsigned long p = bottom & ~31;
+ mm_segment_t fs;
+ int i;
+
+ /*
+ * We need to switch to kernel mode so that we can use __get_user
+ * to safely read from kernel space. Note that we now dump the
+ * code first, just in case the backtrace kills us.
+ */
+ fs = get_fs();
+ set_fs(KERNEL_DS);
+
+ printk("%s", str);
+ printk("(0x%08lx to 0x%08lx)\n", bottom, top);
+
+ for (p = bottom & ~31; p < top;) {
+ printk("%04lx: ", p & 0xffff);
+
+ for (i = 0; i < 8; i++, p += 4) {
+ unsigned int val;
+
+ if (p < bottom || p >= top)
+ printk(" ");
+ else {
+ __get_user(val, (unsigned long *)p);
+ printk("%08x ", val);
+ }
+ }
+ printk ("\n");
+ }
+
+ set_fs(fs);
+}
+
+static void dump_instr(struct pt_regs *regs)
+{
+ unsigned long addr = instruction_pointer(regs);
+ const int width = 8;
+ mm_segment_t fs;
+ int i;
+
+ /*
+ * We need to switch to kernel mode so that we can use __get_user
+ * to safely read from kernel space. Note that we now dump the
+ * code first, just in case the backtrace kills us.
+ */
+ fs = get_fs();
+ set_fs(KERNEL_DS);
+
+ printk("Code: ");
+ for (i = -4; i < 1; i++) {
+ unsigned int val, bad;
+
+ bad = __get_user(val, &((u32 *)addr)[i]);
+
+ if (!bad)
+ printk(i == 0 ? "(%0*x) " : "%0*x ", width, val);
+ else {
+ printk("bad PC value.");
+ break;
+ }
+ }
+ printk("\n");
+
+ set_fs(fs);
+}
+
+/*static*/ void __dump_stack(struct task_struct *tsk, unsigned long sp)
+{
+ dump_mem("Stack: ", sp, 8192+(unsigned long)tsk->thread_info);
+}
+
+void dump_stack(void)
+{
+#ifdef CONFIG_DEBUG_ERRORS
+ __backtrace();
+#endif
+}
+
+EXPORT_SYMBOL(dump_stack);
+
+//FIXME - was a static fn
+void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
+{
+ unsigned int fp;
+ int ok = 1;
+
+ printk("Backtrace: ");
+ fp = regs->ARM_fp;
+ if (!fp) {
+ printk("no frame pointer");
+ ok = 0;
+ } else if (verify_stack(fp)) {
+ printk("invalid frame pointer 0x%08x", fp);
+ ok = 0;
+ } else if (fp < (unsigned long)(tsk->thread_info + 1))
+ printk("frame pointer underflow");
+ printk("\n");
+
+ if (ok)
+ c_backtrace(fp, processor_mode(regs));
+}
+
+/* FIXME - this is probably wrong.. */
+void show_stack(struct task_struct *task, unsigned long *sp) {
+ dump_mem("Stack: ", (unsigned long)sp, 8192+(unsigned long)task->thread_info);
+}
+
+DEFINE_SPINLOCK(die_lock);
+
+/*
+ * This function is protected against re-entrancy.
+ */
+NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
+{
+ struct task_struct *tsk = current;
+
+ console_verbose();
+ spin_lock_irq(&die_lock);
+
+ printk("Internal error: %s: %x\n", str, err);
+ printk("CPU: %d\n", smp_processor_id());
+ show_regs(regs);
+ printk("Process %s (pid: %d, stack limit = 0x%p)\n",
+ current->comm, current->pid, tsk->thread_info + 1);
+
+ if (!user_mode(regs) || in_interrupt()) {
+ __dump_stack(tsk, (unsigned long)(regs + 1));
+ dump_backtrace(regs, tsk);
+ dump_instr(regs);
+ }
+while(1);
+ spin_unlock_irq(&die_lock);
+ do_exit(SIGSEGV);
+}
+
+void die_if_kernel(const char *str, struct pt_regs *regs, int err)
+{
+ if (user_mode(regs))
+ return;
+
+ die(str, regs, err);
+}
+
+static DECLARE_MUTEX(undef_sem);
+static int (*undef_hook)(struct pt_regs *);
+
+int request_undef_hook(int (*fn)(struct pt_regs *))
+{
+ int ret = -EBUSY;
+
+ down(&undef_sem);
+ if (undef_hook == NULL) {
+ undef_hook = fn;
+ ret = 0;
+ }
+ up(&undef_sem);
+
+ return ret;
+}
+
+int release_undef_hook(int (*fn)(struct pt_regs *))
+{
+ int ret = -EINVAL;
+
+ down(&undef_sem);
+ if (undef_hook == fn) {
+ undef_hook = NULL;
+ ret = 0;
+ }
+ up(&undef_sem);
+
+ return ret;
+}
+
+static int undefined_extension(struct pt_regs *regs, unsigned int op)
+{
+ switch (op) {
+ case 1: /* 0xde01 / 0x?7f001f0 */
+ ptrace_break(current, regs);
+ return 0;
+ }
+ return 1;
+}
+
+asmlinkage void do_undefinstr(struct pt_regs *regs)
+{
+ siginfo_t info;
+ void *pc;
+
+ regs->ARM_pc -= 4;
+
+ pc = (unsigned long *)instruction_pointer(regs); /* strip PSR */
+
+ if (user_mode(regs)) {
+ u32 instr;
+
+ get_user(instr, (u32 *)pc);
+
+ if ((instr & 0x0fff00ff) == 0x07f000f0 &&
+ undefined_extension(regs, (instr >> 8) & 255) == 0) {
+ regs->ARM_pc += 4;
+ return;
+ }
+ } else {
+ if (undef_hook && undef_hook(regs) == 0) {
+ regs->ARM_pc += 4;
+ return;
+ }
+ }
+
+#ifdef CONFIG_DEBUG_USER
+ printk(KERN_INFO "%s (%d): undefined instruction: pc=%p\n",
+ current->comm, current->pid, pc);
+ dump_instr(regs);
+#endif
+
+ current->thread.error_code = 0;
+ current->thread.trap_no = 6;
+
+ info.si_signo = SIGILL;
+ info.si_errno = 0;
+ info.si_code = ILL_ILLOPC;
+ info.si_addr = pc;
+
+ force_sig_info(SIGILL, &info, current);
+
+ die_if_kernel("Oops - undefined instruction", regs, 0);
+}
+
+asmlinkage void do_excpt(unsigned long address, struct pt_regs *regs, int mode)
+{
+ siginfo_t info;
+
+#ifdef CONFIG_DEBUG_USER
+ printk(KERN_INFO "%s (%d): address exception: pc=%08lx\n",
+ current->comm, current->pid, instruction_pointer(regs));
+ dump_instr(regs);
+#endif
+
+ current->thread.error_code = 0;
+ current->thread.trap_no = 11;
+
+ info.si_signo = SIGBUS;
+ info.si_errno = 0;
+ info.si_code = BUS_ADRERR;
+ info.si_addr = (void *)address;
+
+ force_sig_info(SIGBUS, &info, current);
+
+ die_if_kernel("Oops - address exception", regs, mode);
+}
+
+asmlinkage void do_unexp_fiq (struct pt_regs *regs)
+{
+#ifndef CONFIG_IGNORE_FIQ
+ printk("Hmm. Unexpected FIQ received, but trying to continue\n");
+ printk("You may have a hardware problem...\n");
+#endif
+}
+
+/*
+ * bad_mode handles the impossible case in the vectors. If you see one of
+ * these, then it's extremely serious, and could mean you have buggy hardware.
+ * It never returns, and never tries to sync. We hope that we can at least
+ * dump out some state information...
+ */
+asmlinkage void bad_mode(struct pt_regs *regs, int reason, int proc_mode)
+{
+ unsigned int vectors = vectors_base();
+
+ console_verbose();
+
+ printk(KERN_CRIT "Bad mode in %s handler detected: mode %s\n",
+ handler[reason<5?reason:4], processor_modes[proc_mode]);
+
+ /*
+ * Dump out the vectors and stub routines. Maybe a better solution
+ * would be to dump them out only if we detect that they are corrupted.
+ */
+ dump_mem(KERN_CRIT "Vectors: ", vectors, vectors + 0x40);
+ dump_mem(KERN_CRIT "Stubs: ", vectors + 0x200, vectors + 0x4b8);
+
+ die("Oops", regs, 0);
+ local_irq_disable();
+ panic("bad mode");
+}
+
+static int bad_syscall(int n, struct pt_regs *regs)
+{
+ struct thread_info *thread = current_thread_info();
+ siginfo_t info;
+
+ if (current->personality != PER_LINUX && thread->exec_domain->handler) {
+ thread->exec_domain->handler(n, regs);
+ return regs->ARM_r0;
+ }
+
+#ifdef CONFIG_DEBUG_USER
+ printk(KERN_ERR "[%d] %s: obsolete system call %08x.\n",
+ current->pid, current->comm, n);
+ dump_instr(regs);
+#endif
+
+ info.si_signo = SIGILL;
+ info.si_errno = 0;
+ info.si_code = ILL_ILLTRP;
+ info.si_addr = (void *)instruction_pointer(regs) - 4;
+
+ force_sig_info(SIGILL, &info, current);
+ die_if_kernel("Oops", regs, n);
+ return regs->ARM_r0;
+}
+
+static inline void
+do_cache_op(unsigned long start, unsigned long end, int flags)
+{
+ struct vm_area_struct *vma;
+
+ if (end < start)
+ return;
+
+ vma = find_vma(current->active_mm, start);
+ if (vma && vma->vm_start < end) {
+ if (start < vma->vm_start)
+ start = vma->vm_start;
+ if (end > vma->vm_end)
+ end = vma->vm_end;
+ }
+}
+
+/*
+ * Handle all unrecognised system calls.
+ * 0x9f0000 - 0x9fffff are some more esoteric system calls
+ */
+#define NR(x) ((__ARM_NR_##x) - __ARM_NR_BASE)
+asmlinkage int arm_syscall(int no, struct pt_regs *regs)
+{
+ siginfo_t info;
+
+ if ((no >> 16) != 0x9f)
+ return bad_syscall(no, regs);
+
+ switch (no & 0xffff) {
+ case 0: /* branch through 0 */
+ info.si_signo = SIGSEGV;
+ info.si_errno = 0;
+ info.si_code = SEGV_MAPERR;
+ info.si_addr = NULL;
+
+ force_sig_info(SIGSEGV, &info, current);
+
+ die_if_kernel("branch through zero", regs, 0);
+ return 0;
+
+ case NR(breakpoint): /* SWI BREAK_POINT */
+ ptrace_break(current, regs);
+ return regs->ARM_r0;
+
+ case NR(cacheflush):
+ return 0;
+
+ case NR(usr26):
+ break;
+
+ default:
+ /* Calls 9f00xx..9f07ff are defined to return -ENOSYS
+ if not implemented, rather than raising SIGILL. This
+ way the calling program can gracefully determine whether
+ a feature is supported. */
+ if (no <= 0x7ff)
+ return -ENOSYS;
+ break;
+ }
+#ifdef CONFIG_DEBUG_USER
+ /*
+ * experience shows that these seem to indicate that
+ * something catastrophic has happened
+ */
+ printk("[%d] %s: arm syscall %d\n", current->pid, current->comm, no);
+ dump_instr(regs);
+ if (user_mode(regs)) {
+ show_regs(regs);
+ c_backtrace(regs->ARM_fp, processor_mode(regs));
+ }
+#endif
+ info.si_signo = SIGILL;
+ info.si_errno = 0;
+ info.si_code = ILL_ILLTRP;
+ info.si_addr = (void *)instruction_pointer(regs) - 4;
+
+ force_sig_info(SIGILL, &info, current);
+ die_if_kernel("Oops", regs, no);
+ return 0;
+}
+
+void __bad_xchg(volatile void *ptr, int size)
+{
+ printk("xchg: bad data size: pc 0x%p, ptr 0x%p, size %d\n",
+ __builtin_return_address(0), ptr, size);
+ BUG();
+}
+
+/*
+ * A data abort trap was taken, but we did not handle the instruction.
+ * Try to abort the user program, or panic if it was the kernel.
+ */
+asmlinkage void
+baddataabort(int code, unsigned long instr, struct pt_regs *regs)
+{
+ unsigned long addr = instruction_pointer(regs);
+ siginfo_t info;
+
+#ifdef CONFIG_DEBUG_USER
+ printk(KERN_ERR "[%d] %s: bad data abort: code %d instr 0x%08lx\n",
+ current->pid, current->comm, code, instr);
+ dump_instr(regs);
+ show_pte(current->mm, addr);
+#endif
+
+ info.si_signo = SIGILL;
+ info.si_errno = 0;
+ info.si_code = ILL_ILLOPC;
+ info.si_addr = (void *)addr;
+
+ force_sig_info(SIGILL, &info, current);
+ die_if_kernel("unknown data abort code", regs, instr);
+}
+
+volatile void __bug(const char *file, int line, void *data)
+{
+ printk(KERN_CRIT"kernel BUG at %s:%d!", file, line);
+ if (data)
+ printk(KERN_CRIT" - extra data = %p", data);
+ printk("\n");
+ *(int *)0 = 0;
+}
+
+void __readwrite_bug(const char *fn)
+{
+ printk("%s called, but not implemented", fn);
+ BUG();
+}
+
+void __pte_error(const char *file, int line, unsigned long val)
+{
+ printk("%s:%d: bad pte %08lx.\n", file, line, val);
+}
+
+void __pmd_error(const char *file, int line, unsigned long val)
+{
+ printk("%s:%d: bad pmd %08lx.\n", file, line, val);
+}
+
+void __pgd_error(const char *file, int line, unsigned long val)
+{
+ printk("%s:%d: bad pgd %08lx.\n", file, line, val);
+}
+
+asmlinkage void __div0(void)
+{
+ printk("Division by zero in kernel.\n");
+ dump_stack();
+}
+
+void abort(void)
+{
+ BUG();
+
+ /* if that doesn't kill us, halt */
+ panic("Oops failed to kill thread");
+}
+
+void __init trap_init(void)
+{
+ extern void __trap_init(unsigned long);
+ unsigned long base = vectors_base();
+
+ __trap_init(base);
+ if (base != 0)
+ printk(KERN_DEBUG "Relocating machine vectors to 0x%08lx\n",
+ base);
+}
diff --git a/arch/arm26/kernel/vmlinux-arm26-xip.lds.in b/arch/arm26/kernel/vmlinux-arm26-xip.lds.in
new file mode 100644
index 0000000..ca61ec8
--- /dev/null
+++ b/arch/arm26/kernel/vmlinux-arm26-xip.lds.in
@@ -0,0 +1,134 @@
+/* ld script to make ARM Linux kernel
+ * taken from the i386 version by Russell King
+ * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+ * borrowed from Russels ARM port by Ian Molton
+ */
+
+#include <asm-generic/vmlinux.lds.h>
+
+OUTPUT_ARCH(arm)
+ENTRY(stext)
+jiffies = jiffies_64;
+SECTIONS
+{
+ . = TEXTADDR;
+ .init : { /* Init code and data */
+ _stext = .;
+ __init_begin = .;
+ _sinittext = .;
+ *(.init.text)
+ _einittext = .;
+ __proc_info_begin = .;
+ *(.proc.info)
+ __proc_info_end = .;
+ __arch_info_begin = .;
+ *(.arch.info)
+ __arch_info_end = .;
+ __tagtable_begin = .;
+ *(.taglist)
+ __tagtable_end = .;
+ . = ALIGN(16);
+ __setup_start = .;
+ *(.init.setup)
+ __setup_end = .;
+ __early_begin = .;
+ *(__early_param)
+ __early_end = .;
+ __initcall_start = .;
+ *(.initcall1.init)
+ *(.initcall2.init)
+ *(.initcall3.init)
+ *(.initcall4.init)
+ *(.initcall5.init)
+ *(.initcall6.init)
+ *(.initcall7.init)
+ __initcall_end = .;
+ __con_initcall_start = .;
+ *(.con_initcall.init)
+ __con_initcall_end = .;
+ . = ALIGN(32);
+ __initramfs_start = .;
+ usr/built-in.o(.init.ramfs)
+ __initramfs_end = .;
+ . = ALIGN(32768);
+ __init_end = .;
+ }
+
+ /DISCARD/ : { /* Exit code and data */
+ *(.exit.text)
+ *(.exit.data)
+ *(.exitcall.exit)
+ }
+
+ .text : { /* Real text segment */
+ _text = .; /* Text and read-only data */
+ *(.text)
+ SCHED_TEXT
+ LOCK_TEXT /* FIXME - borrowed from arm32 - check*/
+ *(.fixup)
+ *(.gnu.warning)
+ *(.rodata)
+ *(.rodata.*)
+ *(.glue_7)
+ *(.glue_7t)
+ *(.got) /* Global offset table */
+
+ _etext = .; /* End of text section */
+ }
+
+ . = ALIGN(16);
+ __ex_table : { /* Exception table */
+ __start___ex_table = .;
+ *(__ex_table)
+ __stop___ex_table = .;
+ }
+
+ RODATA
+
+ _endtext = .;
+
+ . = DATAADDR;
+
+ _sdata = .;
+
+ .data : {
+ . = ALIGN(8192);
+ /*
+ * first, the init thread union, aligned
+ * to an 8192 byte boundary. (see arm26/kernel/init_task.c)
+ * FIXME - sould this be 32K aligned on arm26?
+ */
+ *(.init.task)
+
+ /*
+ * The cacheline aligned data
+ */
+ . = ALIGN(32);
+ *(.data.cacheline_aligned)
+
+ /*
+ * and the usual data section
+ */
+ *(.data)
+ CONSTRUCTORS
+
+ *(.init.data)
+
+ _edata = .;
+ }
+
+ .bss : {
+ __bss_start = .; /* BSS */
+ *(.bss)
+ *(COMMON)
+ _end = . ;
+ }
+ /* Stabs debugging sections. */
+ .stab 0 : { *(.stab) }
+ .stabstr 0 : { *(.stabstr) }
+ .stab.excl 0 : { *(.stab.excl) }
+ .stab.exclstr 0 : { *(.stab.exclstr) }
+ .stab.index 0 : { *(.stab.index) }
+ .stab.indexstr 0 : { *(.stab.indexstr) }
+ .comment 0 : { *(.comment) }
+}
diff --git a/arch/arm26/kernel/vmlinux-arm26.lds.in b/arch/arm26/kernel/vmlinux-arm26.lds.in
new file mode 100644
index 0000000..d1d3418
--- /dev/null
+++ b/arch/arm26/kernel/vmlinux-arm26.lds.in
@@ -0,0 +1,127 @@
+/* ld script to make ARM Linux kernel
+ * taken from the i386 version by Russell King
+ * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+ * borrowed from Russels ARM port by Ian Molton and subsequently modified.
+ */
+
+#include <asm-generic/vmlinux.lds.h>
+
+OUTPUT_ARCH(arm)
+ENTRY(stext)
+jiffies = jiffies_64;
+SECTIONS
+{
+ . = TEXTADDR;
+ .init : { /* Init code and data */
+ _stext = .;
+ __init_begin = .;
+ _sinittext = .;
+ *(.init.text)
+ _einittext = .;
+ __proc_info_begin = .;
+ *(.proc.info)
+ __proc_info_end = .;
+ __arch_info_begin = .;
+ *(.arch.info)
+ __arch_info_end = .;
+ __tagtable_begin = .;
+ *(.taglist)
+ __tagtable_end = .;
+ *(.init.data)
+ . = ALIGN(16);
+ __setup_start = .;
+ *(.init.setup)
+ __setup_end = .;
+ __early_begin = .;
+ *(__early_param)
+ __early_end = .;
+ __initcall_start = .;
+ *(.initcall1.init)
+ *(.initcall2.init)
+ *(.initcall3.init)
+ *(.initcall4.init)
+ *(.initcall5.init)
+ *(.initcall6.init)
+ *(.initcall7.init)
+ __initcall_end = .;
+ __con_initcall_start = .;
+ *(.con_initcall.init)
+ __con_initcall_end = .;
+ . = ALIGN(32);
+ __initramfs_start = .;
+ usr/built-in.o(.init.ramfs)
+ __initramfs_end = .;
+ . = ALIGN(32768);
+ __init_end = .;
+ }
+
+ /DISCARD/ : { /* Exit code and data */
+ *(.exit.text)
+ *(.exit.data)
+ *(.exitcall.exit)
+ }
+
+ .text : { /* Real text segment */
+ _text = .; /* Text and read-only data */
+ *(.text)
+ SCHED_TEXT
+ LOCK_TEXT
+ *(.fixup)
+ *(.gnu.warning)
+ *(.rodata)
+ *(.rodata.*)
+ *(.glue_7)
+ *(.glue_7t)
+ *(.got) /* Global offset table */
+
+ _etext = .; /* End of text section */
+ }
+
+ . = ALIGN(16);
+ __ex_table : { /* Exception table */
+ __start___ex_table = .;
+ *(__ex_table)
+ __stop___ex_table = .;
+ }
+
+ RODATA
+
+ . = ALIGN(8192);
+
+ .data : {
+ /*
+ * first, the init task union, aligned
+ * to an 8192 byte boundary. (see arm26/kernel/init_task.c)
+ */
+ *(.init.task)
+
+ /*
+ * The cacheline aligned data
+ */
+ . = ALIGN(32);
+ *(.data.cacheline_aligned)
+
+ /*
+ * and the usual data section
+ */
+ *(.data)
+ CONSTRUCTORS
+
+ _edata = .;
+ }
+
+ .bss : {
+ __bss_start = .; /* BSS */
+ *(.bss)
+ *(COMMON)
+ _end = . ;
+ }
+ /* Stabs debugging sections. */
+ .stab 0 : { *(.stab) }
+ .stabstr 0 : { *(.stabstr) }
+ .stab.excl 0 : { *(.stab.excl) }
+ .stab.exclstr 0 : { *(.stab.exclstr) }
+ .stab.index 0 : { *(.stab.index) }
+ .stab.indexstr 0 : { *(.stab.indexstr) }
+ .comment 0 : { *(.comment) }
+}
diff --git a/arch/arm26/kernel/vmlinux.lds.S b/arch/arm26/kernel/vmlinux.lds.S
new file mode 100644
index 0000000..811a690
--- /dev/null
+++ b/arch/arm26/kernel/vmlinux.lds.S
@@ -0,0 +1,12 @@
+#include <linux/config.h>
+
+#ifdef CONFIG_XIP_KERNEL
+
+#include "vmlinux-arm26-xip.lds.in"
+
+#else
+
+#include "vmlinux-arm26.lds.in"
+
+#endif
+
generated by cgit v0.10.2 at 2024-11-10 10:55:02 (GMT)