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!

1 files changed, 355 insertions, 0 deletions

diff --git a/include/asm-s390/processor.h b/include/asm-s390/processor.h
new file mode 100644
index 0000000..cbbd114
--- /dev/null
+++ b/include/asm-s390/processor.h
@@ -0,0 +1,355 @@
+/*
+ *  include/asm-s390/processor.h
+ *
+ *  S390 version
+ *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Hartmut Penner (hp@de.ibm.com),
+ *               Martin Schwidefsky (schwidefsky@de.ibm.com)
+ *
+ *  Derived from "include/asm-i386/processor.h"
+ *    Copyright (C) 1994, Linus Torvalds
+ */
+
+#ifndef __ASM_S390_PROCESSOR_H
+#define __ASM_S390_PROCESSOR_H
+
+#include <asm/page.h>
+#include <asm/ptrace.h>
+
+#ifdef __KERNEL__
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ void *pc; __asm__("basr %0,0":"=a"(pc)); pc; })
+
+/*
+ *  CPU type and hardware bug flags. Kept separately for each CPU.
+ *  Members of this structure are referenced in head.S, so think twice
+ *  before touching them. [mj]
+ */
+
+typedef struct
+{
+        unsigned int version :  8;
+        unsigned int ident   : 24;
+        unsigned int machine : 16;
+        unsigned int unused  : 16;
+} __attribute__ ((packed)) cpuid_t;
+
+struct cpuinfo_S390
+{
+        cpuid_t  cpu_id;
+        __u16    cpu_addr;
+        __u16    cpu_nr;
+        unsigned long loops_per_jiffy;
+        unsigned long *pgd_quick;
+#ifdef __s390x__
+        unsigned long *pmd_quick;
+#endif /* __s390x__ */
+        unsigned long *pte_quick;
+        unsigned long pgtable_cache_sz;
+};
+
+extern void print_cpu_info(struct cpuinfo_S390 *);
+
+/* Lazy FPU handling on uni-processor */
+extern struct task_struct *last_task_used_math;
+
+/*
+ * User space process size: 2GB for 31 bit, 4TB for 64 bit.
+ */
+#ifndef __s390x__
+
+# define TASK_SIZE		(0x80000000UL)
+# define TASK_UNMAPPED_BASE	(TASK_SIZE / 2)
+# define DEFAULT_TASK_SIZE	(0x80000000UL)
+
+#else /* __s390x__ */
+
+# define TASK_SIZE		(test_thread_flag(TIF_31BIT) ? \
+					(0x80000000UL) : (0x40000000000UL))
+# define TASK_UNMAPPED_BASE	(TASK_SIZE / 2)
+# define DEFAULT_TASK_SIZE	(0x40000000000UL)
+
+#endif /* __s390x__ */
+
+#define MM_VM_SIZE(mm)		DEFAULT_TASK_SIZE
+
+#define HAVE_ARCH_PICK_MMAP_LAYOUT
+
+typedef struct {
+        __u32 ar4;
+} mm_segment_t;
+
+/*
+ * Thread structure
+ */
+struct thread_struct {
+	s390_fp_regs fp_regs;
+	unsigned int  acrs[NUM_ACRS];
+        unsigned long ksp;              /* kernel stack pointer             */
+        unsigned long user_seg;         /* HSTD                             */
+	mm_segment_t mm_segment;
+        unsigned long prot_addr;        /* address of protection-excep.     */
+        unsigned int error_code;        /* error-code of last prog-excep.   */
+        unsigned int trap_no;
+        per_struct per_info;
+	/* Used to give failing instruction back to user for ieee exceptions */
+	unsigned long ieee_instruction_pointer; 
+        /* pfault_wait is used to block the process on a pfault event */
+	unsigned long pfault_wait;
+};
+
+typedef struct thread_struct thread_struct;
+
+/*
+ * Stack layout of a C stack frame.
+ */
+#ifndef __PACK_STACK
+struct stack_frame {
+	unsigned long back_chain;
+	unsigned long empty1[5];
+	unsigned long gprs[10];
+	unsigned int  empty2[8];
+};
+#else
+struct stack_frame {
+	unsigned long empty1[5];
+	unsigned int  empty2[8];
+	unsigned long gprs[10];
+	unsigned long back_chain;
+};
+#endif
+
+#define ARCH_MIN_TASKALIGN	8
+
+#ifndef __s390x__
+# define __SWAPPER_PG_DIR __pa(&swapper_pg_dir[0]) + _SEGMENT_TABLE
+#else /* __s390x__ */
+# define __SWAPPER_PG_DIR __pa(&swapper_pg_dir[0]) + _REGION_TABLE
+#endif /* __s390x__ */
+
+#define INIT_THREAD {{0,{{0},{0},{0},{0},{0},{0},{0},{0},{0},{0},	       \
+			    {0},{0},{0},{0},{0},{0}}},			       \
+		     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},	       \
+		     sizeof(init_stack) + (unsigned long) &init_stack,	       \
+		     __SWAPPER_PG_DIR,					       \
+		     {0},						       \
+		     0,0,0,						       \
+		     (per_struct) {{{{0,}}},0,0,0,0,{{0,}}},		       \
+		     0, 0						       \
+} 
+
+/*
+ * Do necessary setup to start up a new thread.
+ */
+#ifndef __s390x__
+
+#define start_thread(regs, new_psw, new_stackp) do {            \
+        regs->psw.mask  = PSW_USER_BITS;                        \
+        regs->psw.addr  = new_psw | PSW_ADDR_AMODE;             \
+        regs->gprs[15]  = new_stackp ;                          \
+} while (0)
+
+#else /* __s390x__ */
+
+#define start_thread(regs, new_psw, new_stackp) do {            \
+        regs->psw.mask  = PSW_USER_BITS;                        \
+        regs->psw.addr  = new_psw;                              \
+        regs->gprs[15]  = new_stackp;                           \
+} while (0)
+
+#define start_thread31(regs, new_psw, new_stackp) do {          \
+	regs->psw.mask  = PSW_USER32_BITS;			\
+        regs->psw.addr  = new_psw;                              \
+        regs->gprs[15]  = new_stackp;                           \
+} while (0)
+
+#endif /* __s390x__ */
+
+/* Forward declaration, a strange C thing */
+struct task_struct;
+struct mm_struct;
+
+/* Free all resources held by a thread. */
+extern void release_thread(struct task_struct *);
+extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+
+/* Prepare to copy thread state - unlazy all lazy status */
+#define prepare_to_copy(tsk)	do { } while (0)
+
+/*
+ * Return saved PC of a blocked thread.
+ */
+extern unsigned long thread_saved_pc(struct task_struct *t);
+
+/*
+ * Print register of task into buffer. Used in fs/proc/array.c.
+ */
+extern char *task_show_regs(struct task_struct *task, char *buffer);
+
+extern void show_registers(struct pt_regs *regs);
+extern void show_trace(struct task_struct *task, unsigned long *sp);
+
+unsigned long get_wchan(struct task_struct *p);
+#define __KSTK_PTREGS(tsk) ((struct pt_regs *) \
+        ((unsigned long) tsk->thread_info + THREAD_SIZE - sizeof(struct pt_regs)))
+#define KSTK_EIP(tsk)	(__KSTK_PTREGS(tsk)->psw.addr)
+#define KSTK_ESP(tsk)	(__KSTK_PTREGS(tsk)->gprs[15])
+
+/*
+ * Give up the time slice of the virtual PU.
+ */
+#ifndef __s390x__
+# define cpu_relax()	asm volatile ("diag 0,0,68" : : : "memory")
+#else /* __s390x__ */
+# define cpu_relax() \
+	asm volatile ("ex 0,%0" : : "i" (__LC_DIAG44_OPCODE) : "memory")
+#endif /* __s390x__ */
+
+/*
+ * Set PSW mask to specified value, while leaving the
+ * PSW addr pointing to the next instruction.
+ */
+
+static inline void __load_psw_mask (unsigned long mask)
+{
+	unsigned long addr;
+
+	psw_t psw;
+	psw.mask = mask;
+
+#ifndef __s390x__
+	asm volatile (
+		"    basr %0,0\n"
+		"0:  ahi  %0,1f-0b\n"
+		"    st	  %0,4(%1)\n"
+		"    lpsw 0(%1)\n"
+		"1:"
+		: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc" );
+#else /* __s390x__ */
+	asm volatile (
+		"    larl  %0,1f\n"
+		"    stg   %0,8(%1)\n"
+		"    lpswe 0(%1)\n"
+		"1:"
+		: "=&d" (addr) : "a" (&psw), "m" (psw) : "memory", "cc" );
+#endif /* __s390x__ */
+}
+ 
+/*
+ * Function to stop a processor until an interruption occurred
+ */
+static inline void enabled_wait(void)
+{
+	unsigned long reg;
+	psw_t wait_psw;
+
+	wait_psw.mask = PSW_BASE_BITS | PSW_MASK_IO | PSW_MASK_EXT |
+		PSW_MASK_MCHECK | PSW_MASK_WAIT;
+#ifndef __s390x__
+	asm volatile (
+		"    basr %0,0\n"
+		"0:  la   %0,1f-0b(%0)\n"
+		"    st   %0,4(%1)\n"
+		"    oi   4(%1),0x80\n"
+		"    lpsw 0(%1)\n"
+		"1:"
+		: "=&a" (reg) : "a" (&wait_psw), "m" (wait_psw)
+		: "memory", "cc" );
+#else /* __s390x__ */
+	asm volatile (
+		"    larl  %0,0f\n"
+		"    stg   %0,8(%1)\n"
+		"    lpswe 0(%1)\n"
+		"0:"
+		: "=&a" (reg) : "a" (&wait_psw), "m" (wait_psw)
+		: "memory", "cc" );
+#endif /* __s390x__ */
+}
+
+/*
+ * Function to drop a processor into disabled wait state
+ */
+
+static inline void disabled_wait(unsigned long code)
+{
+        char psw_buffer[2*sizeof(psw_t)];
+        unsigned long ctl_buf;
+        psw_t *dw_psw = (psw_t *)(((unsigned long) &psw_buffer+sizeof(psw_t)-1)
+                                  & -sizeof(psw_t));
+
+        dw_psw->mask = PSW_BASE_BITS | PSW_MASK_WAIT;
+        dw_psw->addr = code;
+        /* 
+         * Store status and then load disabled wait psw,
+         * the processor is dead afterwards
+         */
+#ifndef __s390x__
+        asm volatile ("    stctl 0,0,0(%2)\n"
+                      "    ni    0(%2),0xef\n" /* switch off protection */
+                      "    lctl  0,0,0(%2)\n"
+                      "    stpt  0xd8\n"       /* store timer */
+                      "    stckc 0xe0\n"       /* store clock comparator */
+                      "    stpx  0x108\n"      /* store prefix register */
+                      "    stam  0,15,0x120\n" /* store access registers */
+                      "    std   0,0x160\n"    /* store f0 */
+                      "    std   2,0x168\n"    /* store f2 */
+                      "    std   4,0x170\n"    /* store f4 */
+                      "    std   6,0x178\n"    /* store f6 */
+                      "    stm   0,15,0x180\n" /* store general registers */
+                      "    stctl 0,15,0x1c0\n" /* store control registers */
+                      "    oi    0x1c0,0x10\n" /* fake protection bit */
+                      "    lpsw 0(%1)"
+                      : "=m" (ctl_buf)
+		      : "a" (dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc" );
+#else /* __s390x__ */
+        asm volatile ("    stctg 0,0,0(%2)\n"
+                      "    ni    4(%2),0xef\n" /* switch off protection */
+                      "    lctlg 0,0,0(%2)\n"
+                      "    lghi  1,0x1000\n"
+                      "    stpt  0x328(1)\n"      /* store timer */
+                      "    stckc 0x330(1)\n"      /* store clock comparator */
+                      "    stpx  0x318(1)\n"      /* store prefix register */
+                      "    stam  0,15,0x340(1)\n" /* store access registers */
+                      "    stfpc 0x31c(1)\n"      /* store fpu control */
+                      "    std   0,0x200(1)\n"    /* store f0 */
+                      "    std   1,0x208(1)\n"    /* store f1 */
+                      "    std   2,0x210(1)\n"    /* store f2 */
+                      "    std   3,0x218(1)\n"    /* store f3 */
+                      "    std   4,0x220(1)\n"    /* store f4 */
+                      "    std   5,0x228(1)\n"    /* store f5 */
+                      "    std   6,0x230(1)\n"    /* store f6 */
+                      "    std   7,0x238(1)\n"    /* store f7 */
+                      "    std   8,0x240(1)\n"    /* store f8 */
+                      "    std   9,0x248(1)\n"    /* store f9 */
+                      "    std   10,0x250(1)\n"   /* store f10 */
+                      "    std   11,0x258(1)\n"   /* store f11 */
+                      "    std   12,0x260(1)\n"   /* store f12 */
+                      "    std   13,0x268(1)\n"   /* store f13 */
+                      "    std   14,0x270(1)\n"   /* store f14 */
+                      "    std   15,0x278(1)\n"   /* store f15 */
+                      "    stmg  0,15,0x280(1)\n" /* store general registers */
+                      "    stctg 0,15,0x380(1)\n" /* store control registers */
+                      "    oi    0x384(1),0x10\n" /* fake protection bit */
+                      "    lpswe 0(%1)"
+                      : "=m" (ctl_buf)
+		      : "a" (dw_psw), "a" (&ctl_buf),
+		        "m" (dw_psw) : "cc", "0", "1");
+#endif /* __s390x__ */
+}
+
+/*
+ * CPU idle notifier chain.
+ */
+#define CPU_IDLE	0
+#define CPU_NOT_IDLE	1
+
+struct notifier_block;
+int register_idle_notifier(struct notifier_block *nb);
+int unregister_idle_notifier(struct notifier_block *nb);
+
+#endif
+
+#endif                                 /* __ASM_S390_PROCESSOR_H           */