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-rw-r--r--arch/mips/Kconfig14
-rw-r--r--arch/mips/Makefile31
-rw-r--r--arch/mips/boot/compressed/Makefile100
-rw-r--r--arch/mips/boot/compressed/dbg.c37
-rw-r--r--arch/mips/boot/compressed/decompress.c126
-rw-r--r--arch/mips/boot/compressed/dummy.c4
-rw-r--r--arch/mips/boot/compressed/head.S56
-rw-r--r--arch/mips/boot/compressed/ld.script150
-rw-r--r--arch/mips/boot/compressed/uart-16550.c43
9 files changed, 558 insertions, 3 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index fd7620f..f6f3b99 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -22,6 +22,7 @@ choice
config MACH_ALCHEMY
bool "Alchemy processor based machines"
+ select SYS_SUPPORTS_ZBOOT
config AR7
bool "Texas Instruments AR7"
@@ -36,6 +37,7 @@ config AR7
select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
+ select SYS_SUPPORTS_ZBOOT_UART16550
select GENERIC_GPIO
select GCD
select VLYNQ
@@ -192,6 +194,7 @@ config LASAT
config MACH_LOONGSON
bool "Loongson family of machines"
+ select SYS_SUPPORTS_ZBOOT_UART16550
help
This enables the support of Loongson family of machines.
@@ -233,6 +236,7 @@ config MIPS_MALTA
select SYS_SUPPORTS_MIPS_CMP
select SYS_SUPPORTS_MULTITHREADING
select SYS_SUPPORTS_SMARTMIPS
+ select SYS_SUPPORTS_ZBOOT
help
This enables support for the MIPS Technologies Malta evaluation
board.
@@ -1294,6 +1298,16 @@ config CPU_CAVIUM_OCTEON
endchoice
+config SYS_SUPPORTS_ZBOOT
+ bool
+ select HAVE_KERNEL_GZIP
+ select HAVE_KERNEL_BZIP2
+ select HAVE_KERNEL_LZMA
+
+config SYS_SUPPORTS_ZBOOT_UART16550
+ bool
+ select SYS_SUPPORTS_ZBOOT
+
config CPU_LOONGSON2
bool
select CPU_SUPPORTS_32BIT_KERNEL
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 77f5021..ba04782 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -69,6 +69,7 @@ endif
all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
+all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
#
# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
@@ -331,7 +332,7 @@ load-$(CONFIG_LEMOTE_FULOONG2E) +=0xffffffff80100000
core-$(CONFIG_MIPS_MALTA) += arch/mips/mti-malta/
cflags-$(CONFIG_MIPS_MALTA) += -I$(srctree)/arch/mips/include/asm/mach-malta
load-$(CONFIG_MIPS_MALTA) += 0xffffffff80100000
-all-$(CONFIG_MIPS_MALTA) := vmlinux.bin
+all-$(CONFIG_MIPS_MALTA) := vmlinuz.bin
#
# MIPS SIM
@@ -581,7 +582,7 @@ load-$(CONFIG_SNI_RM) += 0xffffffff80600000
else
load-$(CONFIG_SNI_RM) += 0xffffffff80030000
endif
-all-$(CONFIG_SNI_RM) := vmlinux.ecoff
+all-$(CONFIG_SNI_RM) := vmlinuz.ecoff
#
# Common TXx9
@@ -699,9 +700,23 @@ vmlinux.64: vmlinux
$(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
makeboot =$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) $(1)
+makezboot =$(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
+ VMLINUX_LOAD_ADDRESS=$(load-y) 32bit-bfd=$(32bit-bfd) $(1)
all: $(all-y)
+vmlinuz: vmlinux FORCE
+ +@$(call makezboot,$@)
+
+vmlinuz.bin: vmlinux
+ +@$(call makezboot,$@)
+
+vmlinuz.ecoff: vmlinux
+ +@$(call makezboot,$@)
+
+vmlinuz.srec: vmlinux
+ +@$(call makezboot,$@)
+
vmlinux.bin: $(vmlinux-32)
+@$(call makeboot,$@)
@@ -726,11 +741,13 @@ endif
install:
$(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
+ $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
archclean:
@$(MAKE) $(clean)=arch/mips/boot
+ @$(MAKE) $(clean)=arch/mips/boot/compressed
@$(MAKE) $(clean)=arch/mips/lasat
define archhelp
@@ -738,10 +755,18 @@ define archhelp
echo ' vmlinux.ecoff - ECOFF boot image'
echo ' vmlinux.bin - Raw binary boot image'
echo ' vmlinux.srec - SREC boot image'
+ echo ' vmlinuz - Compressed boot(zboot) image'
+ echo ' vmlinuz.ecoff - ECOFF zboot image'
+ echo ' vmlinuz.bin - Raw binary zboot image'
+ echo ' vmlinuz.srec - SREC zboot image'
echo
echo ' These will be default as apropriate for a configured platform.'
endef
CLEAN_FILES += vmlinux.32 \
vmlinux.64 \
- vmlinux.ecoff
+ vmlinux.ecoff \
+ vmlinuz \
+ vmlinuz.ecoff \
+ vmlinuz.bin \
+ vmlinuz.srec
diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile
new file mode 100644
index 0000000..e27f40b
--- /dev/null
+++ b/arch/mips/boot/compressed/Makefile
@@ -0,0 +1,100 @@
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.
+#
+# Adapted for MIPS Pete Popov, Dan Malek
+#
+# Copyright (C) 1994 by Linus Torvalds
+# Adapted for PowerPC by Gary Thomas
+# modified by Cort (cort@cs.nmt.edu)
+#
+# Copyright (C) 2009 Lemote Inc. & DSLab, Lanzhou University
+# Author: Wu Zhangjin <wuzj@lemote.com>
+#
+
+# compressed kernel load addr: VMLINUZ_LOAD_ADDRESS > VMLINUX_LOAD_ADDRESS + VMLINUX_SIZE
+VMLINUX_SIZE := $(shell wc -c $(objtree)/$(KBUILD_IMAGE) 2>/dev/null | cut -d' ' -f1)
+VMLINUX_SIZE := $(shell [ -n "$(VMLINUX_SIZE)" ] && echo $$(($(VMLINUX_SIZE) + (65536 - $(VMLINUX_SIZE) % 65536))))
+VMLINUZ_LOAD_ADDRESS := 0x$(shell [ -n "$(VMLINUX_SIZE)" ] && printf %x $$(($(VMLINUX_LOAD_ADDRESS) + $(VMLINUX_SIZE))))
+
+# set the default size of the mallocing area for decompressing
+BOOT_HEAP_SIZE := 0x400000
+
+# Disable Function Tracer
+KBUILD_CFLAGS := $(shell echo $(KBUILD_CFLAGS) | sed -e "s/-pg//")
+
+KBUILD_CFLAGS := $(LINUXINCLUDE) $(KBUILD_CFLAGS) -D__KERNEL__ \
+ -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull" \
+
+KBUILD_AFLAGS := $(LINUXINCLUDE) $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
+ -DKERNEL_ENTRY=0x$(shell $(NM) $(objtree)/$(KBUILD_IMAGE) 2>/dev/null | grep " kernel_entry" | cut -f1 -d \ ) \
+ -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE)
+
+obj-y := $(obj)/head.o $(obj)/decompress.o $(obj)/dbg.o
+
+obj-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
+
+OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
+$(obj)/vmlinux.bin: $(KBUILD_IMAGE)
+ $(call if_changed,objcopy)
+
+suffix_$(CONFIG_KERNEL_GZIP) = gz
+suffix_$(CONFIG_KERNEL_BZIP2) = bz2
+suffix_$(CONFIG_KERNEL_LZMA) = lzma
+tool_$(CONFIG_KERNEL_GZIP) = gzip
+tool_$(CONFIG_KERNEL_BZIP2) = bzip2
+tool_$(CONFIG_KERNEL_LZMA) = lzma
+$(obj)/vmlinux.$(suffix_y): $(obj)/vmlinux.bin
+ $(call if_changed,$(tool_y))
+
+$(obj)/piggy.o: $(obj)/vmlinux.$(suffix_y) $(obj)/dummy.o
+ $(Q)$(OBJCOPY) $(OBJCOPYFLAGS) \
+ --add-section=.image=$< \
+ --set-section-flags=.image=contents,alloc,load,readonly,data \
+ $(obj)/dummy.o $@
+
+LDFLAGS_vmlinuz := $(LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T
+vmlinuz: $(src)/ld.script $(obj-y) $(obj)/piggy.o
+ $(call if_changed,ld)
+ $(Q)$(OBJCOPY) $(OBJCOPYFLAGS) -R .comment -R .stab -R .stabstr -R .initrd -R .sysmap $@
+
+#
+# Some DECstations need all possible sections of an ECOFF executable
+#
+ifdef CONFIG_MACH_DECSTATION
+ E2EFLAGS = -a
+else
+ E2EFLAGS =
+endif
+
+# elf2ecoff can only handle 32bit image
+
+ifdef CONFIG_32BIT
+ VMLINUZ = vmlinuz
+else
+ VMLINUZ = vmlinuz.32
+endif
+
+vmlinuz.32: vmlinuz
+ $(Q)$(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
+
+vmlinuz.ecoff: $(obj)/../elf2ecoff $(VMLINUZ)
+ $(Q)$(obj)/../elf2ecoff $(VMLINUZ) vmlinuz.ecoff $(E2EFLAGS)
+
+$(obj)/../elf2ecoff: $(src)/../elf2ecoff.c
+ $(Q)$(HOSTCC) -o $@ $^
+
+drop-sections = .reginfo .mdebug .comment .note .pdr .options .MIPS.options
+strip-flags = $(addprefix --remove-section=,$(drop-sections))
+
+OBJCOPYFLAGS_vmlinuz.bin := $(OBJCOPYFLAGS) -O binary $(strip-flags)
+vmlinuz.bin: vmlinuz
+ $(call if_changed,objcopy)
+
+OBJCOPYFLAGS_vmlinuz.srec := $(OBJCOPYFLAGS) -S -O srec $(strip-flags)
+vmlinuz.srec: vmlinuz
+ $(call if_changed,objcopy)
+
+clean:
+clean-files += *.o \
+ vmlinu*
diff --git a/arch/mips/boot/compressed/dbg.c b/arch/mips/boot/compressed/dbg.c
new file mode 100644
index 0000000..ff4dc7a
--- /dev/null
+++ b/arch/mips/boot/compressed/dbg.c
@@ -0,0 +1,37 @@
+/*
+ * MIPS-specific debug support for pre-boot environment
+ *
+ * NOTE: putc() is board specific, if your board have a 16550 compatible uart,
+ * please select SYS_SUPPORTS_ZBOOT_UART16550 for your machine. othewise, you
+ * need to implement your own putc().
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+
+void __attribute__ ((weak)) putc(char c)
+{
+}
+
+void puts(const char *s)
+{
+ char c;
+ while ((c = *s++) != '\0') {
+ putc(c);
+ if (c == '\n')
+ putc('\r');
+ }
+}
+
+void puthex(unsigned long long val)
+{
+
+ unsigned char buf[10];
+ int i;
+ for (i = 7; i >= 0; i--) {
+ buf[i] = "0123456789ABCDEF"[val & 0x0F];
+ val >>= 4;
+ }
+ buf[8] = '\0';
+ puts(buf);
+}
diff --git a/arch/mips/boot/compressed/decompress.c b/arch/mips/boot/compressed/decompress.c
new file mode 100644
index 0000000..67330c2
--- /dev/null
+++ b/arch/mips/boot/compressed/decompress.c
@@ -0,0 +1,126 @@
+/*
+ * Misc. bootloader code for many machines.
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: Matt Porter <mporter@mvista.com> Derived from
+ * arch/ppc/boot/prep/misc.c
+ *
+ * Copyright (C) 2009 Lemote, Inc. & Institute of Computing Technology
+ * Author: Wu Zhangjin <wuzj@lemote.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <asm/addrspace.h>
+
+/* These two variables specify the free mem region
+ * that can be used for temporary malloc area
+ */
+unsigned long free_mem_ptr;
+unsigned long free_mem_end_ptr;
+char *zimage_start;
+
+/* The linker tells us where the image is. */
+extern unsigned char __image_begin, __image_end;
+extern unsigned char __ramdisk_begin, __ramdisk_end;
+unsigned long initrd_size;
+
+/* debug interfaces */
+extern void puts(const char *s);
+extern void puthex(unsigned long long val);
+
+void error(char *x)
+{
+ puts("\n\n");
+ puts(x);
+ puts("\n\n -- System halted");
+
+ while (1)
+ ; /* Halt */
+}
+
+/* activate the code for pre-boot environment */
+#define STATIC static
+
+#ifdef CONFIG_KERNEL_GZIP
+void *memcpy(void *dest, const void *src, size_t n)
+{
+ int i;
+ const char *s = src;
+ char *d = dest;
+
+ for (i = 0; i < n; i++)
+ d[i] = s[i];
+ return dest;
+}
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
+#ifdef CONFIG_KERNEL_BZIP2
+void *memset(void *s, int c, size_t n)
+{
+ int i;
+ char *ss = s;
+
+ for (i = 0; i < n; i++)
+ ss[i] = c;
+ return s;
+}
+#include "../../../../lib/decompress_bunzip2.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZMA
+#include "../../../../lib/decompress_unlzma.c"
+#endif
+
+void decompress_kernel(unsigned long boot_heap_start)
+{
+ int zimage_size;
+
+ /*
+ * We link ourself to an arbitrary low address. When we run, we
+ * relocate outself to that address. __image_beign points to
+ * the part of the image where the zImage is. -- Tom
+ */
+ zimage_start = (char *)(unsigned long)(&__image_begin);
+ zimage_size = (unsigned long)(&__image_end) -
+ (unsigned long)(&__image_begin);
+
+ /*
+ * The zImage and initrd will be between start and _end, so they've
+ * already been moved once. We're good to go now. -- Tom
+ */
+ puts("zimage at: ");
+ puthex((unsigned long)zimage_start);
+ puts(" ");
+ puthex((unsigned long)(zimage_size + zimage_start));
+ puts("\n");
+
+ if (initrd_size) {
+ puts("initrd at: ");
+ puthex((unsigned long)(&__ramdisk_begin));
+ puts(" ");
+ puthex((unsigned long)(&__ramdisk_end));
+ puts("\n");
+ }
+
+ /* this area are prepared for mallocing when decompressing */
+ free_mem_ptr = boot_heap_start;
+ free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE;
+
+ /* Display standard Linux/MIPS boot prompt for kernel args */
+ puts("Uncompressing Linux at load address ");
+ puthex(VMLINUX_LOAD_ADDRESS_ULL);
+ puts("\n");
+ /* Decompress the kernel with according algorithm */
+ decompress(zimage_start, zimage_size, 0, 0,
+ (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, error);
+ /* FIXME: is there a need to flush cache here? */
+ puts("Now, booting the kernel...\n");
+}
diff --git a/arch/mips/boot/compressed/dummy.c b/arch/mips/boot/compressed/dummy.c
new file mode 100644
index 0000000..31dbf45
--- /dev/null
+++ b/arch/mips/boot/compressed/dummy.c
@@ -0,0 +1,4 @@
+int main(void)
+{
+ return 0;
+}
diff --git a/arch/mips/boot/compressed/head.S b/arch/mips/boot/compressed/head.S
new file mode 100644
index 0000000..4e65a84
--- /dev/null
+++ b/arch/mips/boot/compressed/head.S
@@ -0,0 +1,56 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1994, 1995 Waldorf Electronics
+ * Written by Ralf Baechle and Andreas Busse
+ * Copyright (C) 1995 - 1999 Ralf Baechle
+ * Copyright (C) 1996 Paul M. Antoine
+ * Modified for DECStation and hence R3000 support by Paul M. Antoine
+ * Further modifications by David S. Miller and Harald Koerfgen
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+
+#include <asm/asm.h>
+#include <asm/regdef.h>
+
+ .set noreorder
+ .cprestore
+ LEAF(start)
+start:
+ /* Save boot rom start args */
+ move s0, a0
+ move s1, a1
+ move s2, a2
+ move s3, a3
+
+ /* Clear BSS */
+ PTR_LA a0, _edata
+ PTR_LA a2, _end
+1: sw zero, 0(a0)
+ bne a2, a0, 1b
+ addiu a0, a0, 4
+
+ PTR_LA a0, (.heap) /* heap address */
+ PTR_LA sp, (.stack + 8192) /* stack address */
+
+ PTR_LA ra, 2f
+ PTR_LA k0, decompress_kernel
+ jr k0
+ nop
+2:
+ move a0, s0
+ move a1, s1
+ move a2, s2
+ move a3, s3
+ PTR_LI k0, KERNEL_ENTRY
+ jr k0
+ nop
+3:
+ b 3b
+ nop
+ END(start)
+
+ .comm .heap,BOOT_HEAP_SIZE,4
+ .comm .stack,4096*2,4
diff --git a/arch/mips/boot/compressed/ld.script b/arch/mips/boot/compressed/ld.script
new file mode 100644
index 0000000..29e9f4c
--- /dev/null
+++ b/arch/mips/boot/compressed/ld.script
@@ -0,0 +1,150 @@
+OUTPUT_ARCH(mips)
+ENTRY(start)
+SECTIONS
+{
+ /* Read-only sections, merged into text segment: */
+ .init : { *(.init) } =0
+ .text :
+ {
+ _ftext = . ;
+ *(.text)
+ *(.rodata)
+ *(.rodata1)
+ /* .gnu.warning sections are handled specially by elf32.em. */
+ *(.gnu.warning)
+ } =0
+ .kstrtab : { *(.kstrtab) }
+
+ . = ALIGN(16); /* Exception table */
+ __start___ex_table = .;
+ __ex_table : { *(__ex_table) }
+ __stop___ex_table = .;
+
+ __start___dbe_table = .; /* Exception table for data bus errors */
+ __dbe_table : { *(__dbe_table) }
+ __stop___dbe_table = .;
+
+ __start___ksymtab = .; /* Kernel symbol table */
+ __ksymtab : { *(__ksymtab) }
+ __stop___ksymtab = .;
+
+ _etext = .;
+
+ . = ALIGN(8192);
+ .data.init_task : { *(.data.init_task) }
+
+ /* Startup code */
+ . = ALIGN(4096);
+ __init_begin = .;
+ .text.init : { *(.text.init) }
+ .data.init : { *(.data.init) }
+ . = ALIGN(16);
+ __setup_start = .;
+ .setup.init : { *(.setup.init) }
+ __setup_end = .;
+ __initcall_start = .;
+ .initcall.init : { *(.initcall.init) }
+ __initcall_end = .;
+ . = ALIGN(4096); /* Align double page for init_task_union */
+ __init_end = .;
+
+ . = ALIGN(4096);
+ .data.page_aligned : { *(.data.idt) }
+
+ . = ALIGN(32);
+ .data.cacheline_aligned : { *(.data.cacheline_aligned) }
+
+ .fini : { *(.fini) } =0
+ .reginfo : { *(.reginfo) }
+ /* Adjust the address for the data segment. We want to adjust up to
+ the same address within the page on the next page up. It would
+ be more correct to do this:
+ . = .;
+ The current expression does not correctly handle the case of a
+ text segment ending precisely at the end of a page; it causes the
+ data segment to skip a page. The above expression does not have
+ this problem, but it will currently (2/95) cause BFD to allocate
+ a single segment, combining both text and data, for this case.
+ This will prevent the text segment from being shared among
+ multiple executions of the program; I think that is more
+ important than losing a page of the virtual address space (note
+ that no actual memory is lost; the page which is skipped can not
+ be referenced). */
+ . = .;
+ .data :
+ {
+ _fdata = . ;
+ *(.data)
+
+ /* Put the compressed image here, so bss is on the end. */
+ __image_begin = .;
+ *(.image)
+ __image_end = .;
+ /* Align the initial ramdisk image (INITRD) on page boundaries. */
+ . = ALIGN(4096);
+ __ramdisk_begin = .;
+ *(.initrd)
+ __ramdisk_end = .;
+ . = ALIGN(4096);
+
+ CONSTRUCTORS
+ }
+ .data1 : { *(.data1) }
+ _gp = . + 0x8000;
+ .lit8 : { *(.lit8) }
+ .lit4 : { *(.lit4) }
+ .ctors : { *(.ctors) }
+ .dtors : { *(.dtors) }
+ .got : { *(.got.plt) *(.got) }
+ .dynamic : { *(.dynamic) }
+ /* We want the small data sections together, so single-instruction offsets
+ can access them all, and initialized data all before uninitialized, so
+ we can shorten the on-disk segment size. */
+ .sdata : { *(.sdata) }
+ . = ALIGN(4);
+ _edata = .;
+ PROVIDE (edata = .);
+
+ __bss_start = .;
+ _fbss = .;
+ .sbss : { *(.sbss) *(.scommon) }
+ .bss :
+ {
+ *(.dynbss)
+ *(.bss)
+ *(COMMON)
+ . = ALIGN(4);
+ _end = . ;
+ PROVIDE (end = .);
+ }
+
+ /* Sections to be discarded */
+ /DISCARD/ :
+ {
+ *(.text.exit)
+ *(.data.exit)
+ *(.exitcall.exit)
+ }
+
+ /* This is the MIPS specific mdebug section. */
+ .mdebug : { *(.mdebug) }
+ /* These are needed for ELF backends which have not yet been
+ converted to the new style linker. */
+ .stab 0 : { *(.stab) }
+ .stabstr 0 : { *(.stabstr) }
+ /* DWARF debug sections.
+ Symbols in the .debug DWARF section are relative to the beginning of the
+ section so we begin .debug at 0. It's not clear yet what needs to happen
+ for the others. */
+ .debug 0 : { *(.debug) }
+ .debug_srcinfo 0 : { *(.debug_srcinfo) }
+ .debug_aranges 0 : { *(.debug_aranges) }
+ .debug_pubnames 0 : { *(.debug_pubnames) }
+ .debug_sfnames 0 : { *(.debug_sfnames) }
+ .line 0 : { *(.line) }
+ /* These must appear regardless of . */
+ .gptab.sdata : { *(.gptab.data) *(.gptab.sdata) }
+ .gptab.sbss : { *(.gptab.bss) *(.gptab.sbss) }
+ .comment : { *(.comment) }
+ .note : { *(.note) }
+}
diff --git a/arch/mips/boot/compressed/uart-16550.c b/arch/mips/boot/compressed/uart-16550.c
new file mode 100644
index 0000000..c9caaf4
--- /dev/null
+++ b/arch/mips/boot/compressed/uart-16550.c
@@ -0,0 +1,43 @@
+/*
+ * 16550 compatible uart based serial debug support for zboot
+ */
+
+#include <linux/types.h>
+#include <linux/serial_reg.h>
+#include <linux/init.h>
+
+#include <asm/addrspace.h>
+
+#if defined(CONFIG_MACH_LOONGSON) || defined(CONFIG_MIPS_MALTA)
+#define UART_BASE 0x1fd003f8
+#define PORT(offset) (CKSEG1ADDR(UART_BASE) + (offset))
+#endif
+
+#ifdef CONFIG_AR7
+#include <ar7.h>
+#define PORT(offset) (CKSEG1ADDR(AR7_REGS_UART0) + (4 * offset))
+#endif
+
+#ifndef PORT
+#error please define the serial port address for your own machine
+#endif
+
+static inline unsigned int serial_in(int offset)
+{
+ return *((char *)PORT(offset));
+}
+
+static inline void serial_out(int offset, int value)
+{
+ *((char *)PORT(offset)) = value;
+}
+
+void putc(char c)
+{
+ int timeout = 1024;
+
+ while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
+ ;
+
+ serial_out(UART_TX, c);
+}
generated by cgit v0.10.2 at 2024-11-15 23:23:56 (GMT)