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Commit 70fac51feaf2ca50c84e102e2a2699eb19ef24bd

Authored by GuanXuetao
1 parent 96cf5185a9
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

unicore32 additional architecture files: boot process 

This patch implements booting process, including uncompression process.

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

Showing 7 changed files with 546 additions and 0 deletions Side-by-side Diff

arch/unicore32/boot/Makefile
Diff comments   View file @ 70fac51
  1 +#
  2 +# arch/unicore32/boot/Makefile
  3 +#
  4 +# This file is included by the global makefile so that you can add your own
  5 +# architecture-specific flags and dependencies.
  6 +#
  7 +# This file is subject to the terms and conditions of the GNU General Public
  8 +# License. See the file "COPYING" in the main directory of this archive
  9 +# for more details.
  10 +#
  11 +# Copyright (C) 2001~2010 GUAN Xue-tao
  12 +#
  13 +
  14 +MKIMAGE := $(srctree)/scripts/mkuboot.sh
  15 +
  16 +targets := Image zImage uImage
  17 +
  18 +$(obj)/Image: vmlinux FORCE
  19 + $(call if_changed,objcopy)
  20 + @echo ' Kernel: $@ is ready'
  21 +
  22 +$(obj)/compressed/vmlinux: $(obj)/Image FORCE
  23 + $(Q)$(MAKE) $(build)=$(obj)/compressed $@
  24 +
  25 +$(obj)/zImage: $(obj)/compressed/vmlinux FORCE
  26 + $(call if_changed,objcopy)
  27 + @echo ' Kernel: $@ is ready'
  28 +
  29 +quiet_cmd_uimage = UIMAGE $@
  30 + cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A unicore -O linux -T kernel \
  31 + -C none -a $(LOADADDR) -e $(STARTADDR) \
  32 + -n 'Linux-$(KERNELRELEASE)' -d $< $@
  33 +
  34 +$(obj)/uImage: LOADADDR=0x0
  35 +
  36 +$(obj)/uImage: STARTADDR=$(LOADADDR)
  37 +
  38 +$(obj)/uImage: $(obj)/zImage FORCE
  39 + $(call if_changed,uimage)
  40 + @echo ' Image $@ is ready'
  41 +
  42 +PHONY += initrd FORCE
  43 +initrd:
  44 + @test "$(INITRD)" != "" || \
  45 + (echo You must specify INITRD; exit -1)
  46 +
  47 +subdir- := compressed
arch/unicore32/boot/compressed/Makefile
Diff comments   View file @ 70fac51
  1 +#
  2 +# linux/arch/unicore32/boot/compressed/Makefile
  3 +#
  4 +# create a compressed vmlinuz image from the original vmlinux
  5 +#
  6 +# This file is subject to the terms and conditions of the GNU General Public
  7 +# License. See the file "COPYING" in the main directory of this archive
  8 +# for more details.
  9 +#
  10 +# Copyright (C) 2001~2010 GUAN Xue-tao
  11 +#
  12 +
  13 +EXTRA_CFLAGS := -fpic -fno-builtin
  14 +EXTRA_AFLAGS := -Wa,-march=all
  15 +
  16 +OBJS := misc.o
  17 +
  18 +# font.c and font.o
  19 +CFLAGS_font.o := -Dstatic=
  20 +$(obj)/font.c: $(srctree)/drivers/video/console/font_8x8.c
  21 + $(call cmd,shipped)
  22 +
  23 +# piggy.S and piggy.o
  24 +suffix_$(CONFIG_KERNEL_GZIP) := gzip
  25 +suffix_$(CONFIG_KERNEL_BZIP2) := bz2
  26 +suffix_$(CONFIG_KERNEL_LZO) := lzo
  27 +suffix_$(CONFIG_KERNEL_LZMA) := lzma
  28 +
  29 +$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
  30 + $(call if_changed,$(suffix_y))
  31 +
  32 +SEDFLAGS_piggy = s/DECOMP_SUFFIX/$(suffix_y)/
  33 +$(obj)/piggy.S: $(obj)/piggy.S.in
  34 + @sed "$(SEDFLAGS_piggy)" < $< > $@
  35 +
  36 +$(obj)/piggy.o: $(obj)/piggy.$(suffix_y) $(obj)/piggy.S FORCE
  37 +
  38 +targets := vmlinux vmlinux.lds font.o font.c head.o misc.o \
  39 + piggy.$(suffix_y) piggy.o piggy.S \
  40 +
  41 +# Make sure files are removed during clean
  42 +extra-y += piggy.gzip piggy.bz2 piggy.lzo piggy.lzma
  43 +
  44 +# ?
  45 +LDFLAGS_vmlinux += -p
  46 +# Report unresolved symbol references
  47 +LDFLAGS_vmlinux += --no-undefined
  48 +# Delete all temporary local symbols
  49 +LDFLAGS_vmlinux += -X
  50 +# Next argument is a linker script
  51 +LDFLAGS_vmlinux += -T
  52 +
  53 +# For uidivmod
  54 +$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head.o $(obj)/piggy.o \
  55 + $(obj)/misc.o FORCE
  56 + $(call if_changed,ld)
  57 + @:
  58 +
  59 +# We now have a PIC decompressor implementation. Decompressors running
  60 +# from RAM should not define ZTEXTADDR. Decompressors running directly
  61 +# from ROM or Flash must define ZTEXTADDR (preferably via the config)
  62 +ZTEXTADDR := 0
  63 +ZBSSADDR := ALIGN(4)
  64 +
  65 +SEDFLAGS_lds = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
  66 +$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/unicore32/boot/Makefile $(KCONFIG_CONFIG)
  67 + @sed "$(SEDFLAGS_lds)" < $< > $@
arch/unicore32/boot/compressed/head.S
Diff comments   View file @ 70fac51
  1 +/*
  2 + * linux/arch/unicore32/boot/compressed/head.S
  3 + *
  4 + * Code specific to PKUnity SoC and UniCore ISA
  5 + *
  6 + * Copyright (C) 2001-2010 GUAN Xue-tao
  7 + *
  8 + * This program is free software; you can redistribute it and/or modify
  9 + * it under the terms of the GNU General Public License version 2 as
  10 + * published by the Free Software Foundation.
  11 + */
  12 +#include <linux/linkage.h>
  13 +#include <mach/memory.h>
  14 +
  15 +#define csub cmpsub
  16 +#define cand cmpand
  17 +#define nop8 nop; nop; nop; nop; nop; nop; nop; nop
  18 +
  19 + .section ".start", #alloc, #execinstr
  20 + .text
  21 +start:
  22 + .type start,#function
  23 +
  24 + /* Initialize ASR, PRIV mode and INTR off */
  25 + mov r0, #0xD3
  26 + mov.a asr, r0
  27 +
  28 + adr r0, LC0
  29 + ldm (r1, r2, r3, r5, r6, r7, r8), [r0]+
  30 + ldw sp, [r0+], #28
  31 + sub.a r0, r0, r1 @ calculate the delta offset
  32 +
  33 + /*
  34 + * if delta is zero, we are running at the address
  35 + * we were linked at.
  36 + */
  37 + beq not_relocated
  38 +
  39 + /*
  40 + * We're running at a different address. We need to fix
  41 + * up various pointers:
  42 + * r5 - zImage base address (_start)
  43 + * r7 - GOT start
  44 + * r8 - GOT end
  45 + */
  46 + add r5, r5, r0
  47 + add r7, r7, r0
  48 + add r8, r8, r0
  49 +
  50 + /*
  51 + * we need to fix up pointers into the BSS region.
  52 + * r2 - BSS start
  53 + * r3 - BSS end
  54 + * sp - stack pointer
  55 + */
  56 + add r2, r2, r0
  57 + add r3, r3, r0
  58 + add sp, sp, r0
  59 +
  60 + /*
  61 + * Relocate all entries in the GOT table.
  62 + * This fixes up the C references.
  63 + * r7 - GOT start
  64 + * r8 - GOT end
  65 + */
  66 +1001: ldw r1, [r7+], #0
  67 + add r1, r1, r0
  68 + stw.w r1, [r7]+, #4
  69 + csub.a r7, r8
  70 + bub 1001b
  71 +
  72 +not_relocated:
  73 + /*
  74 + * Clear BSS region.
  75 + * r2 - BSS start
  76 + * r3 - BSS end
  77 + */
  78 + mov r0, #0
  79 +1002: stw.w r0, [r2]+, #4
  80 + csub.a r2, r3
  81 + bub 1002b
  82 +
  83 + /*
  84 + * Turn on the cache.
  85 + */
  86 + mov r0, #0
  87 + movc p0.c5, r0, #28 @ cache invalidate all
  88 + nop8
  89 + movc p0.c6, r0, #6 @ tlb invalidate all
  90 + nop8
  91 +
  92 + mov r0, #0x1c @ en icache and wb dcache
  93 + movc p0.c1, r0, #0
  94 + nop8
  95 +
  96 + /*
  97 + * Set up some pointers, for starting decompressing.
  98 + */
  99 +
  100 + mov r1, sp @ malloc space above stack
  101 + add r2, sp, #0x10000 @ 64k max
  102 +
  103 + /*
  104 + * Check to see if we will overwrite ourselves.
  105 + * r4 = final kernel address
  106 + * r5 = start of this image
  107 + * r6 = size of decompressed image
  108 + * r2 = end of malloc space (and therefore this image)
  109 + * We basically want:
  110 + * r4 >= r2 -> OK
  111 + * r4 + image length <= r5 -> OK
  112 + */
  113 + ldw r4, =KERNEL_IMAGE_START
  114 + csub.a r4, r2
  115 + bea wont_overwrite
  116 + add r0, r4, r6
  117 + csub.a r0, r5
  118 + beb wont_overwrite
  119 +
  120 + /*
  121 + * If overwrite, just print error message
  122 + */
  123 + b __error_overwrite
  124 +
  125 + /*
  126 + * We're not in danger of overwriting ourselves.
  127 + * Do this the simple way.
  128 + */
  129 +wont_overwrite:
  130 + /*
  131 + * decompress_kernel:
  132 + * r0: output_start
  133 + * r1: free_mem_ptr_p
  134 + * r2: free_mem_ptr_end_p
  135 + */
  136 + mov r0, r4
  137 + b.l decompress_kernel @ C functions
  138 +
  139 + /*
  140 + * Clean and flush the cache to maintain consistency.
  141 + */
  142 + mov r0, #0
  143 + movc p0.c5, r0, #14 @ flush dcache
  144 + nop8
  145 + movc p0.c5, r0, #20 @ icache invalidate all
  146 + nop8
  147 +
  148 + /*
  149 + * Turn off the Cache and MMU.
  150 + */
  151 + mov r0, #0 @ disable i/d cache and MMU
  152 + movc p0.c1, r0, #0
  153 + nop8
  154 +
  155 + mov r0, #0 @ must be zero
  156 + ldw r4, =KERNEL_IMAGE_START
  157 + mov pc, r4 @ call kernel
  158 +
  159 +
  160 + .align 2
  161 + .type LC0, #object
  162 +LC0: .word LC0 @ r1
  163 + .word __bss_start @ r2
  164 + .word _end @ r3
  165 + .word _start @ r5
  166 + .word _image_size @ r6
  167 + .word _got_start @ r7
  168 + .word _got_end @ r8
  169 + .word decompress_stack_end @ sp
  170 + .size LC0, . - LC0
  171 +
  172 +print_string:
  173 +#ifdef CONFIG_DEBUG_OCD
  174 +2001: ldb.w r1, [r0]+, #1
  175 + csub.a r1, #0
  176 + bne 2002f
  177 + mov pc, lr
  178 +2002:
  179 + movc r2, p1.c0, #0
  180 + cand.a r2, #2
  181 + bne 2002b
  182 + movc p1.c1, r1, #1
  183 + csub.a r1, #'\n'
  184 + cmoveq r1, #'\r'
  185 + beq 2002b
  186 + b 2001b
  187 +#else
  188 + mov pc, lr
  189 +#endif
  190 +
  191 +__error_overwrite:
  192 + adr r0, str_error
  193 + b.l print_string
  194 +2001: nop8
  195 + b 2001b
  196 +str_error: .asciz "\nError: Kernel address OVERWRITE\n"
  197 + .align
  198 +
  199 + .ltorg
  200 +
  201 + .align 4
  202 + .section ".stack", "aw", %nobits
  203 +decompress_stack: .space 4096
  204 +decompress_stack_end:
arch/unicore32/boot/compressed/misc.c
Diff comments   View file @ 70fac51
  1 +/*
  2 + * linux/arch/unicore32/boot/compressed/misc.c
  3 + *
  4 + * Code specific to PKUnity SoC and UniCore ISA
  5 + *
  6 + * Copyright (C) 2001-2010 GUAN Xue-tao
  7 + *
  8 + * This program is free software; you can redistribute it and/or modify
  9 + * it under the terms of the GNU General Public License version 2 as
  10 + * published by the Free Software Foundation.
  11 + */
  12 +
  13 +#include <asm/unaligned.h>
  14 +#include <mach/uncompress.h>
  15 +
  16 +/*
  17 + * gzip delarations
  18 + */
  19 +unsigned char *output_data;
  20 +unsigned long output_ptr;
  21 +
  22 +unsigned int free_mem_ptr;
  23 +unsigned int free_mem_end_ptr;
  24 +
  25 +#define STATIC static
  26 +#define STATIC_RW_DATA /* non-static please */
  27 +
  28 +/*
  29 + * arch-dependent implementations
  30 + */
  31 +#ifndef ARCH_HAVE_DECOMP_ERROR
  32 +#define arch_decomp_error(x)
  33 +#endif
  34 +
  35 +#ifndef ARCH_HAVE_DECOMP_SETUP
  36 +#define arch_decomp_setup()
  37 +#endif
  38 +
  39 +#ifndef ARCH_HAVE_DECOMP_PUTS
  40 +#define arch_decomp_puts(p)
  41 +#endif
  42 +
  43 +void *memcpy(void *dest, const void *src, size_t n)
  44 +{
  45 + int i = 0;
  46 + unsigned char *d = (unsigned char *)dest, *s = (unsigned char *)src;
  47 +
  48 + for (i = n >> 3; i > 0; i--) {
  49 + *d++ = *s++;
  50 + *d++ = *s++;
  51 + *d++ = *s++;
  52 + *d++ = *s++;
  53 + *d++ = *s++;
  54 + *d++ = *s++;
  55 + *d++ = *s++;
  56 + *d++ = *s++;
  57 + }
  58 +
  59 + if (n & 1 << 2) {
  60 + *d++ = *s++;
  61 + *d++ = *s++;
  62 + *d++ = *s++;
  63 + *d++ = *s++;
  64 + }
  65 +
  66 + if (n & 1 << 1) {
  67 + *d++ = *s++;
  68 + *d++ = *s++;
  69 + }
  70 +
  71 + if (n & 1)
  72 + *d++ = *s++;
  73 +
  74 + return dest;
  75 +}
  76 +
  77 +void error(char *x)
  78 +{
  79 + arch_decomp_puts("\n\n");
  80 + arch_decomp_puts(x);
  81 + arch_decomp_puts("\n\n -- System halted");
  82 +
  83 + arch_decomp_error(x);
  84 +
  85 + for (;;)
  86 + ; /* Halt */
  87 +}
  88 +
  89 +/* Heap size should be adjusted for different decompress method */
  90 +#ifdef CONFIG_KERNEL_GZIP
  91 +#include "../../../../lib/decompress_inflate.c"
  92 +#endif
  93 +
  94 +#ifdef CONFIG_KERNEL_BZIP2
  95 +#include "../../../../lib/decompress_bunzip2.c"
  96 +#endif
  97 +
  98 +#ifdef CONFIG_KERNEL_LZO
  99 +#include "../../../../lib/decompress_unlzo.c"
  100 +#endif
  101 +
  102 +#ifdef CONFIG_KERNEL_LZMA
  103 +#include "../../../../lib/decompress_unlzma.c"
  104 +#endif
  105 +
  106 +unsigned long decompress_kernel(unsigned long output_start,
  107 + unsigned long free_mem_ptr_p,
  108 + unsigned long free_mem_ptr_end_p)
  109 +{
  110 + unsigned char *tmp;
  111 +
  112 + output_data = (unsigned char *)output_start;
  113 + free_mem_ptr = free_mem_ptr_p;
  114 + free_mem_end_ptr = free_mem_ptr_end_p;
  115 +
  116 + arch_decomp_setup();
  117 +
  118 + tmp = (unsigned char *) (((unsigned long)input_data_end) - 4);
  119 + output_ptr = get_unaligned_le32(tmp);
  120 +
  121 + arch_decomp_puts("Uncompressing Linux...");
  122 + decompress(input_data, input_data_end - input_data, NULL, NULL,
  123 + output_data, NULL, error);
  124 + arch_decomp_puts(" done, booting the kernel.\n");
  125 + return output_ptr;
  126 +}
arch/unicore32/boot/compressed/piggy.S.in
Diff comments   View file @ 70fac51
  1 + .section .piggydata,#alloc
  2 + .globl input_data
  3 +input_data:
  4 + .incbin "arch/unicore32/boot/compressed/piggy.DECOMP_SUFFIX"
  5 + .globl input_data_end
  6 +input_data_end:
arch/unicore32/boot/compressed/vmlinux.lds.in
Diff comments   View file @ 70fac51
  1 +/*
  2 + * linux/arch/unicore/boot/compressed/vmlinux.lds.in
  3 + *
  4 + * Code specific to PKUnity SoC and UniCore ISA
  5 + *
  6 + * Copyright (C) 2001-2010 GUAN Xue-tao
  7 + *
  8 + * This program is free software; you can redistribute it and/or modify
  9 + * it under the terms of the GNU General Public License version 2 as
  10 + * published by the Free Software Foundation.
  11 + */
  12 +OUTPUT_ARCH(unicore32)
  13 +ENTRY(_start)
  14 +SECTIONS
  15 +{
  16 + /DISCARD/ : {
  17 + /*
  18 + * Discard any r/w data - this produces a link error if we have any,
  19 + * which is required for PIC decompression. Local data generates
  20 + * GOTOFF relocations, which prevents it being relocated independently
  21 + * of the text/got segments.
  22 + */
  23 + *(.data)
  24 + }
  25 +
  26 + . = TEXT_START;
  27 + _text = .;
  28 +
  29 + .text : {
  30 + _start = .;
  31 + *(.start)
  32 + *(.text)
  33 + *(.text.*)
  34 + *(.fixup)
  35 + *(.gnu.warning)
  36 + *(.rodata)
  37 + *(.rodata.*)
  38 + *(.piggydata)
  39 + . = ALIGN(4);
  40 + }
  41 +
  42 + _etext = .;
  43 +
  44 + /* Assume size of decompressed image is 4x the compressed image */
  45 + _image_size = (_etext - _text) * 4;
  46 +
  47 + _got_start = .;
  48 + .got : { *(.got) }
  49 + _got_end = .;
  50 + .got.plt : { *(.got.plt) }
  51 + _edata = .;
  52 +
  53 + . = BSS_START;
  54 + __bss_start = .;
  55 + .bss : { *(.bss) }
  56 + _end = .;
  57 +
  58 + .stack : { *(.stack) }
  59 + .comment 0 : { *(.comment) }
  60 +}
arch/unicore32/include/mach/uncompress.h
Diff comments   View file @ 70fac51
  1 +/*
  2 + * linux/arch/unicore32/include/mach/uncompress.h
  3 + *
  4 + * Code specific to PKUnity SoC and UniCore ISA
  5 + *
  6 + * Copyright (C) 2001-2010 GUAN Xue-tao
  7 + *
  8 + * This program is free software; you can redistribute it and/or modify
  9 + * it under the terms of the GNU General Public License version 2 as
  10 + * published by the Free Software Foundation.
  11 + */
  12 +
  13 +#ifndef __MACH_PUV3_UNCOMPRESS_H__
  14 +#define __MACH_PUV3_UNCOMPRESS_H__
  15 +
  16 +#include "hardware.h"
  17 +#include "ocd.h"
  18 +
  19 +extern char input_data[];
  20 +extern char input_data_end[];
  21 +
  22 +static void arch_decomp_puts(const char *ptr)
  23 +{
  24 + char c;
  25 +
  26 + while ((c = *ptr++) != '\0') {
  27 + if (c == '\n')
  28 + putc('\r');
  29 + putc(c);
  30 + }
  31 +}
  32 +#define ARCH_HAVE_DECOMP_PUTS
  33 +
  34 +#endif /* __MACH_PUV3_UNCOMPRESS_H__ */