diff options
Diffstat (limited to 'arch/unicore32/boot/compressed')
| -rw-r--r-- | arch/unicore32/boot/compressed/Makefile | 67 | ||||
| -rw-r--r-- | arch/unicore32/boot/compressed/head.S | 204 | ||||
| -rw-r--r-- | arch/unicore32/boot/compressed/misc.c | 126 | ||||
| -rw-r--r-- | arch/unicore32/boot/compressed/piggy.S.in | 6 | ||||
| -rw-r--r-- | arch/unicore32/boot/compressed/vmlinux.lds.in | 61 |
5 files changed, 464 insertions, 0 deletions
diff --git a/arch/unicore32/boot/compressed/Makefile b/arch/unicore32/boot/compressed/Makefile new file mode 100644 index 000000000..9aecdd3dd --- /dev/null +++ b/arch/unicore32/boot/compressed/Makefile @@ -0,0 +1,67 @@ +# +# linux/arch/unicore32/boot/compressed/Makefile +# +# create a compressed vmlinuz image from the original vmlinux +# +# 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) 2001~2010 GUAN Xue-tao +# + +ccflags-y := -fpic -fno-builtin +asflags-y := -Wa,-march=all + +OBJS := misc.o + +# font.c and font.o +CFLAGS_font.o := -Dstatic= +$(obj)/font.c: $(srctree)/lib/fonts/font_8x8.c + $(call cmd,shipped) + +# piggy.S and piggy.o +suffix_$(CONFIG_KERNEL_GZIP) := gzip +suffix_$(CONFIG_KERNEL_BZIP2) := bz2 +suffix_$(CONFIG_KERNEL_LZO) := lzo +suffix_$(CONFIG_KERNEL_LZMA) := lzma + +$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE + $(call if_changed,$(suffix_y)) + +SEDFLAGS_piggy = s/DECOMP_SUFFIX/$(suffix_y)/ +$(obj)/piggy.S: $(obj)/piggy.S.in + @sed "$(SEDFLAGS_piggy)" < $< > $@ + +$(obj)/piggy.o: $(obj)/piggy.$(suffix_y) $(obj)/piggy.S FORCE + +targets := vmlinux vmlinux.lds font.o font.c head.o misc.o \ + piggy.$(suffix_y) piggy.o piggy.S \ + +# Make sure files are removed during clean +extra-y += piggy.gzip piggy.bz2 piggy.lzo piggy.lzma + +# ? +LDFLAGS_vmlinux += -p +# Report unresolved symbol references +LDFLAGS_vmlinux += --no-undefined +# Delete all temporary local symbols +LDFLAGS_vmlinux += -X +# Next argument is a linker script +LDFLAGS_vmlinux += -T + +# For uidivmod +$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head.o $(obj)/piggy.o \ + $(obj)/misc.o FORCE + $(call if_changed,ld) + +# We now have a PIC decompressor implementation. Decompressors running +# from RAM should not define ZTEXTADDR. Decompressors running directly +# from ROM or Flash must define ZTEXTADDR (preferably via the config) +ZTEXTADDR := 0x03000000 +ZBSSADDR := ALIGN(4) + +SEDFLAGS_lds = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/ +$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/unicore32/boot/Makefile $(KCONFIG_CONFIG) + @sed "$(SEDFLAGS_lds)" < $< > $@ + diff --git a/arch/unicore32/boot/compressed/head.S b/arch/unicore32/boot/compressed/head.S new file mode 100644 index 000000000..fbd1e374c --- /dev/null +++ b/arch/unicore32/boot/compressed/head.S @@ -0,0 +1,204 @@ +/* + * linux/arch/unicore32/boot/compressed/head.S + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * 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/linkage.h> +#include <mach/memory.h> + +#define csub cmpsub +#define cand cmpand +#define nop8 nop; nop; nop; nop; nop; nop; nop; nop + + .section ".start", #alloc, #execinstr + .text +start: + .type start,#function + + /* Initialize ASR, PRIV mode and INTR off */ + mov r0, #0xD3 + mov.a asr, r0 + + adr r0, LC0 + ldm (r1, r2, r3, r5, r6, r7, r8), [r0]+ + ldw sp, [r0+], #28 + sub.a r0, r0, r1 @ calculate the delta offset + + /* + * if delta is zero, we are running at the address + * we were linked at. + */ + beq not_relocated + + /* + * We're running at a different address. We need to fix + * up various pointers: + * r5 - zImage base address (_start) + * r7 - GOT start + * r8 - GOT end + */ + add r5, r5, r0 + add r7, r7, r0 + add r8, r8, r0 + + /* + * we need to fix up pointers into the BSS region. + * r2 - BSS start + * r3 - BSS end + * sp - stack pointer + */ + add r2, r2, r0 + add r3, r3, r0 + add sp, sp, r0 + + /* + * Relocate all entries in the GOT table. + * This fixes up the C references. + * r7 - GOT start + * r8 - GOT end + */ +1001: ldw r1, [r7+], #0 + add r1, r1, r0 + stw.w r1, [r7]+, #4 + csub.a r7, r8 + bub 1001b + +not_relocated: + /* + * Clear BSS region. + * r2 - BSS start + * r3 - BSS end + */ + mov r0, #0 +1002: stw.w r0, [r2]+, #4 + csub.a r2, r3 + bub 1002b + + /* + * Turn on the cache. + */ + mov r0, #0 + movc p0.c5, r0, #28 @ cache invalidate all + nop8 + movc p0.c6, r0, #6 @ tlb invalidate all + nop8 + + mov r0, #0x1c @ en icache and wb dcache + movc p0.c1, r0, #0 + nop8 + + /* + * Set up some pointers, for starting decompressing. + */ + + mov r1, sp @ malloc space above stack + add r2, sp, #0x10000 @ 64k max + + /* + * Check to see if we will overwrite ourselves. + * r4 = final kernel address + * r5 = start of this image + * r6 = size of decompressed image + * r2 = end of malloc space (and therefore this image) + * We basically want: + * r4 >= r2 -> OK + * r4 + image length <= r5 -> OK + */ + ldw r4, =KERNEL_IMAGE_START + csub.a r4, r2 + bea wont_overwrite + add r0, r4, r6 + csub.a r0, r5 + beb wont_overwrite + + /* + * If overwrite, just print error message + */ + b __error_overwrite + + /* + * We're not in danger of overwriting ourselves. + * Do this the simple way. + */ +wont_overwrite: + /* + * decompress_kernel: + * r0: output_start + * r1: free_mem_ptr_p + * r2: free_mem_ptr_end_p + */ + mov r0, r4 + b.l decompress_kernel @ C functions + + /* + * Clean and flush the cache to maintain consistency. + */ + mov r0, #0 + movc p0.c5, r0, #14 @ flush dcache + nop8 + movc p0.c5, r0, #20 @ icache invalidate all + nop8 + + /* + * Turn off the Cache and MMU. + */ + mov r0, #0 @ disable i/d cache and MMU + movc p0.c1, r0, #0 + nop8 + + mov r0, #0 @ must be zero + ldw r4, =KERNEL_IMAGE_START + mov pc, r4 @ call kernel + + + .align 2 + .type LC0, #object +LC0: .word LC0 @ r1 + .word __bss_start @ r2 + .word _end @ r3 + .word _start @ r5 + .word _image_size @ r6 + .word _got_start @ r7 + .word _got_end @ r8 + .word decompress_stack_end @ sp + .size LC0, . - LC0 + +print_string: +#ifdef CONFIG_DEBUG_OCD +2001: ldb.w r1, [r0]+, #1 + csub.a r1, #0 + bne 2002f + mov pc, lr +2002: + movc r2, p1.c0, #0 + cand.a r2, #2 + bne 2002b + movc p1.c1, r1, #1 + csub.a r1, #'\n' + cmoveq r1, #'\r' + beq 2002b + b 2001b +#else + mov pc, lr +#endif + +__error_overwrite: + adr r0, str_error + b.l print_string +2001: nop8 + b 2001b +str_error: .asciz "\nError: Kernel address OVERWRITE\n" + .align + + .ltorg + + .align 4 + .section ".stack", "aw", %nobits +decompress_stack: .space 4096 +decompress_stack_end: diff --git a/arch/unicore32/boot/compressed/misc.c b/arch/unicore32/boot/compressed/misc.c new file mode 100644 index 000000000..5c65dfee2 --- /dev/null +++ b/arch/unicore32/boot/compressed/misc.c @@ -0,0 +1,126 @@ +/* + * linux/arch/unicore32/boot/compressed/misc.c + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * 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 <asm/unaligned.h> +#include <mach/uncompress.h> + +/* + * gzip delarations + */ +unsigned char *output_data; +unsigned long output_ptr; + +unsigned int free_mem_ptr; +unsigned int free_mem_end_ptr; + +#define STATIC static +#define STATIC_RW_DATA /* non-static please */ + +/* + * arch-dependent implementations + */ +#ifndef ARCH_HAVE_DECOMP_ERROR +#define arch_decomp_error(x) +#endif + +#ifndef ARCH_HAVE_DECOMP_SETUP +#define arch_decomp_setup() +#endif + +#ifndef ARCH_HAVE_DECOMP_PUTS +#define arch_decomp_puts(p) +#endif + +void *memcpy(void *dest, const void *src, size_t n) +{ + int i = 0; + unsigned char *d = (unsigned char *)dest, *s = (unsigned char *)src; + + for (i = n >> 3; i > 0; i--) { + *d++ = *s++; + *d++ = *s++; + *d++ = *s++; + *d++ = *s++; + *d++ = *s++; + *d++ = *s++; + *d++ = *s++; + *d++ = *s++; + } + + if (n & 1 << 2) { + *d++ = *s++; + *d++ = *s++; + *d++ = *s++; + *d++ = *s++; + } + + if (n & 1 << 1) { + *d++ = *s++; + *d++ = *s++; + } + + if (n & 1) + *d++ = *s++; + + return dest; +} + +void error(char *x) +{ + arch_decomp_puts("\n\n"); + arch_decomp_puts(x); + arch_decomp_puts("\n\n -- System halted"); + + arch_decomp_error(x); + + for (;;) + ; /* Halt */ +} + +/* Heap size should be adjusted for different decompress method */ +#ifdef CONFIG_KERNEL_GZIP +#include "../../../../lib/decompress_inflate.c" +#endif + +#ifdef CONFIG_KERNEL_BZIP2 +#include "../../../../lib/decompress_bunzip2.c" +#endif + +#ifdef CONFIG_KERNEL_LZO +#include "../../../../lib/decompress_unlzo.c" +#endif + +#ifdef CONFIG_KERNEL_LZMA +#include "../../../../lib/decompress_unlzma.c" +#endif + +unsigned long decompress_kernel(unsigned long output_start, + unsigned long free_mem_ptr_p, + unsigned long free_mem_ptr_end_p) +{ + unsigned char *tmp; + + output_data = (unsigned char *)output_start; + free_mem_ptr = free_mem_ptr_p; + free_mem_end_ptr = free_mem_ptr_end_p; + + arch_decomp_setup(); + + tmp = (unsigned char *) (((unsigned long)input_data_end) - 4); + output_ptr = get_unaligned_le32(tmp); + + arch_decomp_puts("Uncompressing Linux..."); + __decompress(input_data, input_data_end - input_data, NULL, NULL, + output_data, 0, NULL, error); + arch_decomp_puts(" done, booting the kernel.\n"); + return output_ptr; +} diff --git a/arch/unicore32/boot/compressed/piggy.S.in b/arch/unicore32/boot/compressed/piggy.S.in new file mode 100644 index 000000000..b79704d58 --- /dev/null +++ b/arch/unicore32/boot/compressed/piggy.S.in @@ -0,0 +1,6 @@ + .section .piggydata,#alloc + .globl input_data +input_data: + .incbin "arch/unicore32/boot/compressed/piggy.DECOMP_SUFFIX" + .globl input_data_end +input_data_end: diff --git a/arch/unicore32/boot/compressed/vmlinux.lds.in b/arch/unicore32/boot/compressed/vmlinux.lds.in new file mode 100644 index 000000000..d5a3ce296 --- /dev/null +++ b/arch/unicore32/boot/compressed/vmlinux.lds.in @@ -0,0 +1,61 @@ +/* + * linux/arch/unicore/boot/compressed/vmlinux.lds.in + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * 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. + */ +OUTPUT_ARCH(unicore32) +ENTRY(_start) +SECTIONS +{ + /DISCARD/ : { + /* + * Discard any r/w data - this produces a link error if we have any, + * which is required for PIC decompression. Local data generates + * GOTOFF relocations, which prevents it being relocated independently + * of the text/got segments. + */ + *(.data) + } + + . = TEXT_START; + _text = .; + + .text : { + _start = .; + *(.start) + *(.text) + *(.text.*) + *(.fixup) + *(.gnu.warning) + *(.rodata) + *(.rodata.*) + *(.piggydata) + . = ALIGN(4); + } + + _etext = .; + + /* Assume size of decompressed image is 4x the compressed image */ + _image_size = (_etext - _text) * 4; + + _got_start = .; + .got : { *(.got) } + _got_end = .; + .got.plt : { *(.got.plt) } + _edata = .; + + . = BSS_START; + __bss_start = .; + .bss : { *(.bss) } + _end = .; + + .stack : { *(.stack) } + .comment 0 : { *(.comment) } +} + |