forked from mirrors/linux
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>
This commit is contained in:
GuanXuetao
parent
96cf5185a9
commit
70fac51fea
7 changed files with 546 additions and 0 deletions
47
arch/unicore32/boot/Makefile
Normal file
47
arch/unicore32/boot/Makefile
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@ -0,0 +1,47 @@
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#
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# arch/unicore32/boot/Makefile
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#
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# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies.
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 2001~2010 GUAN Xue-tao
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#
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MKIMAGE := $(srctree)/scripts/mkuboot.sh
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targets := Image zImage uImage
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$(obj)/Image: vmlinux FORCE
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$(call if_changed,objcopy)
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@echo ' Kernel: $@ is ready'
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$(obj)/compressed/vmlinux: $(obj)/Image FORCE
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$(Q)$(MAKE) $(build)=$(obj)/compressed $@
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$(obj)/zImage: $(obj)/compressed/vmlinux FORCE
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$(call if_changed,objcopy)
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@echo ' Kernel: $@ is ready'
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quiet_cmd_uimage = UIMAGE $@
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cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A unicore -O linux -T kernel \
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-C none -a $(LOADADDR) -e $(STARTADDR) \
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-n 'Linux-$(KERNELRELEASE)' -d $< $@
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$(obj)/uImage: LOADADDR=0x0
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$(obj)/uImage: STARTADDR=$(LOADADDR)
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$(obj)/uImage: $(obj)/zImage FORCE
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$(call if_changed,uimage)
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@echo ' Image $@ is ready'
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PHONY += initrd FORCE
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initrd:
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@test "$(INITRD)" != "" || \
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(echo You must specify INITRD; exit -1)
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subdir- := compressed
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68
arch/unicore32/boot/compressed/Makefile
Normal file
68
arch/unicore32/boot/compressed/Makefile
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@ -0,0 +1,68 @@
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#
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# linux/arch/unicore32/boot/compressed/Makefile
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#
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# create a compressed vmlinuz image from the original vmlinux
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 2001~2010 GUAN Xue-tao
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#
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EXTRA_CFLAGS := -fpic -fno-builtin
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EXTRA_AFLAGS := -Wa,-march=all
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OBJS := misc.o
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# font.c and font.o
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CFLAGS_font.o := -Dstatic=
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$(obj)/font.c: $(srctree)/drivers/video/console/font_8x8.c
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$(call cmd,shipped)
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# piggy.S and piggy.o
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suffix_$(CONFIG_KERNEL_GZIP) := gzip
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suffix_$(CONFIG_KERNEL_BZIP2) := bz2
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suffix_$(CONFIG_KERNEL_LZO) := lzo
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suffix_$(CONFIG_KERNEL_LZMA) := lzma
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$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
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$(call if_changed,$(suffix_y))
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SEDFLAGS_piggy = s/DECOMP_SUFFIX/$(suffix_y)/
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$(obj)/piggy.S: $(obj)/piggy.S.in
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@sed "$(SEDFLAGS_piggy)" < $< > $@
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$(obj)/piggy.o: $(obj)/piggy.$(suffix_y) $(obj)/piggy.S FORCE
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targets := vmlinux vmlinux.lds font.o font.c head.o misc.o \
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piggy.$(suffix_y) piggy.o piggy.S \
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# Make sure files are removed during clean
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extra-y += piggy.gzip piggy.bz2 piggy.lzo piggy.lzma
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# ?
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LDFLAGS_vmlinux += -p
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# Report unresolved symbol references
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LDFLAGS_vmlinux += --no-undefined
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# Delete all temporary local symbols
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LDFLAGS_vmlinux += -X
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# Next argument is a linker script
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LDFLAGS_vmlinux += -T
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# For uidivmod
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$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head.o $(obj)/piggy.o \
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$(obj)/misc.o FORCE
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$(call if_changed,ld)
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@:
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# We now have a PIC decompressor implementation. Decompressors running
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# from RAM should not define ZTEXTADDR. Decompressors running directly
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# from ROM or Flash must define ZTEXTADDR (preferably via the config)
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ZTEXTADDR := 0
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ZBSSADDR := ALIGN(4)
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SEDFLAGS_lds = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
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$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/unicore32/boot/Makefile $(KCONFIG_CONFIG)
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@sed "$(SEDFLAGS_lds)" < $< > $@
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204
arch/unicore32/boot/compressed/head.S
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204
arch/unicore32/boot/compressed/head.S
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@ -0,0 +1,204 @@
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/*
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* linux/arch/unicore32/boot/compressed/head.S
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/linkage.h>
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#include <mach/memory.h>
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#define csub cmpsub
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#define cand cmpand
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#define nop8 nop; nop; nop; nop; nop; nop; nop; nop
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.section ".start", #alloc, #execinstr
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.text
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start:
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.type start,#function
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/* Initialize ASR, PRIV mode and INTR off */
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mov r0, #0xD3
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mov.a asr, r0
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adr r0, LC0
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ldm (r1, r2, r3, r5, r6, r7, r8), [r0]+
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ldw sp, [r0+], #28
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sub.a r0, r0, r1 @ calculate the delta offset
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/*
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* if delta is zero, we are running at the address
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* we were linked at.
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*/
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beq not_relocated
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/*
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* We're running at a different address. We need to fix
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* up various pointers:
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* r5 - zImage base address (_start)
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* r7 - GOT start
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* r8 - GOT end
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*/
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add r5, r5, r0
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add r7, r7, r0
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add r8, r8, r0
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/*
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* we need to fix up pointers into the BSS region.
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* r2 - BSS start
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* r3 - BSS end
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* sp - stack pointer
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*/
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add r2, r2, r0
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add r3, r3, r0
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add sp, sp, r0
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/*
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* Relocate all entries in the GOT table.
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* This fixes up the C references.
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* r7 - GOT start
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* r8 - GOT end
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*/
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1001: ldw r1, [r7+], #0
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add r1, r1, r0
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stw.w r1, [r7]+, #4
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csub.a r7, r8
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bub 1001b
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not_relocated:
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/*
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* Clear BSS region.
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* r2 - BSS start
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* r3 - BSS end
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*/
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mov r0, #0
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1002: stw.w r0, [r2]+, #4
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csub.a r2, r3
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bub 1002b
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/*
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* Turn on the cache.
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*/
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mov r0, #0
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movc p0.c5, r0, #28 @ cache invalidate all
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nop8
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movc p0.c6, r0, #6 @ tlb invalidate all
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nop8
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mov r0, #0x1c @ en icache and wb dcache
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movc p0.c1, r0, #0
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nop8
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/*
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* Set up some pointers, for starting decompressing.
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*/
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mov r1, sp @ malloc space above stack
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add r2, sp, #0x10000 @ 64k max
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/*
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* Check to see if we will overwrite ourselves.
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* r4 = final kernel address
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* r5 = start of this image
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* r6 = size of decompressed image
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* r2 = end of malloc space (and therefore this image)
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* We basically want:
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* r4 >= r2 -> OK
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* r4 + image length <= r5 -> OK
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*/
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ldw r4, =KERNEL_IMAGE_START
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csub.a r4, r2
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bea wont_overwrite
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add r0, r4, r6
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csub.a r0, r5
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beb wont_overwrite
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/*
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* If overwrite, just print error message
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*/
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b __error_overwrite
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/*
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* We're not in danger of overwriting ourselves.
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* Do this the simple way.
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*/
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wont_overwrite:
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/*
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* decompress_kernel:
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* r0: output_start
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* r1: free_mem_ptr_p
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* r2: free_mem_ptr_end_p
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*/
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mov r0, r4
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b.l decompress_kernel @ C functions
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/*
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* Clean and flush the cache to maintain consistency.
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*/
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mov r0, #0
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movc p0.c5, r0, #14 @ flush dcache
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nop8
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movc p0.c5, r0, #20 @ icache invalidate all
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nop8
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/*
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* Turn off the Cache and MMU.
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*/
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mov r0, #0 @ disable i/d cache and MMU
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movc p0.c1, r0, #0
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nop8
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mov r0, #0 @ must be zero
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ldw r4, =KERNEL_IMAGE_START
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mov pc, r4 @ call kernel
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.align 2
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.type LC0, #object
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LC0: .word LC0 @ r1
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.word __bss_start @ r2
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.word _end @ r3
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.word _start @ r5
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.word _image_size @ r6
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.word _got_start @ r7
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.word _got_end @ r8
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.word decompress_stack_end @ sp
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.size LC0, . - LC0
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print_string:
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#ifdef CONFIG_DEBUG_OCD
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2001: ldb.w r1, [r0]+, #1
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csub.a r1, #0
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bne 2002f
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mov pc, lr
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2002:
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movc r2, p1.c0, #0
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cand.a r2, #2
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bne 2002b
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movc p1.c1, r1, #1
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csub.a r1, #'\n'
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cmoveq r1, #'\r'
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beq 2002b
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b 2001b
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#else
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mov pc, lr
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#endif
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__error_overwrite:
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adr r0, str_error
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b.l print_string
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2001: nop8
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b 2001b
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str_error: .asciz "\nError: Kernel address OVERWRITE\n"
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.align
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.ltorg
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.align 4
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.section ".stack", "aw", %nobits
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decompress_stack: .space 4096
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decompress_stack_end:
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126
arch/unicore32/boot/compressed/misc.c
Normal file
126
arch/unicore32/boot/compressed/misc.c
Normal file
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@ -0,0 +1,126 @@
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/*
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* linux/arch/unicore32/boot/compressed/misc.c
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <asm/unaligned.h>
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#include <mach/uncompress.h>
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/*
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* gzip delarations
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*/
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unsigned char *output_data;
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unsigned long output_ptr;
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unsigned int free_mem_ptr;
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unsigned int free_mem_end_ptr;
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#define STATIC static
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#define STATIC_RW_DATA /* non-static please */
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/*
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* arch-dependent implementations
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*/
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#ifndef ARCH_HAVE_DECOMP_ERROR
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#define arch_decomp_error(x)
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#endif
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#ifndef ARCH_HAVE_DECOMP_SETUP
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#define arch_decomp_setup()
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#endif
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#ifndef ARCH_HAVE_DECOMP_PUTS
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#define arch_decomp_puts(p)
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#endif
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void *memcpy(void *dest, const void *src, size_t n)
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{
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int i = 0;
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unsigned char *d = (unsigned char *)dest, *s = (unsigned char *)src;
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for (i = n >> 3; i > 0; i--) {
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*d++ = *s++;
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*d++ = *s++;
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*d++ = *s++;
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*d++ = *s++;
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*d++ = *s++;
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*d++ = *s++;
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*d++ = *s++;
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*d++ = *s++;
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}
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if (n & 1 << 2) {
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*d++ = *s++;
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*d++ = *s++;
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*d++ = *s++;
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*d++ = *s++;
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}
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if (n & 1 << 1) {
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*d++ = *s++;
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*d++ = *s++;
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}
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if (n & 1)
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*d++ = *s++;
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return dest;
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}
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void error(char *x)
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{
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arch_decomp_puts("\n\n");
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arch_decomp_puts(x);
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arch_decomp_puts("\n\n -- System halted");
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arch_decomp_error(x);
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for (;;)
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; /* Halt */
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}
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/* Heap size should be adjusted for different decompress method */
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#ifdef CONFIG_KERNEL_GZIP
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#include "../../../../lib/decompress_inflate.c"
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#endif
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#ifdef CONFIG_KERNEL_BZIP2
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#include "../../../../lib/decompress_bunzip2.c"
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#endif
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#ifdef CONFIG_KERNEL_LZO
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#include "../../../../lib/decompress_unlzo.c"
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#endif
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#ifdef CONFIG_KERNEL_LZMA
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#include "../../../../lib/decompress_unlzma.c"
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#endif
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unsigned long decompress_kernel(unsigned long output_start,
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unsigned long free_mem_ptr_p,
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unsigned long free_mem_ptr_end_p)
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{
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unsigned char *tmp;
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output_data = (unsigned char *)output_start;
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free_mem_ptr = free_mem_ptr_p;
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free_mem_end_ptr = free_mem_ptr_end_p;
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arch_decomp_setup();
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tmp = (unsigned char *) (((unsigned long)input_data_end) - 4);
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output_ptr = get_unaligned_le32(tmp);
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arch_decomp_puts("Uncompressing Linux...");
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decompress(input_data, input_data_end - input_data, NULL, NULL,
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output_data, NULL, error);
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arch_decomp_puts(" done, booting the kernel.\n");
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return output_ptr;
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}
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6
arch/unicore32/boot/compressed/piggy.S.in
Normal file
6
arch/unicore32/boot/compressed/piggy.S.in
Normal file
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@ -0,0 +1,6 @@
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.section .piggydata,#alloc
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.globl input_data
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input_data:
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.incbin "arch/unicore32/boot/compressed/piggy.DECOMP_SUFFIX"
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.globl input_data_end
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input_data_end:
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61
arch/unicore32/boot/compressed/vmlinux.lds.in
Normal file
61
arch/unicore32/boot/compressed/vmlinux.lds.in
Normal file
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@ -0,0 +1,61 @@
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/*
|
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* 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.
|
||||
*/
|
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OUTPUT_ARCH(unicore32)
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ENTRY(_start)
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SECTIONS
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{
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/DISCARD/ : {
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/*
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* Discard any r/w data - this produces a link error if we have any,
|
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* which is required for PIC decompression. Local data generates
|
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* GOTOFF relocations, which prevents it being relocated independently
|
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* of the text/got segments.
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*/
|
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*(.data)
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}
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. = TEXT_START;
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_text = .;
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|
||||
.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) }
|
||||
}
|
||||
|
||||
34
arch/unicore32/include/mach/uncompress.h
Normal file
34
arch/unicore32/include/mach/uncompress.h
Normal file
|
|
@ -0,0 +1,34 @@
|
|||
/*
|
||||
* linux/arch/unicore32/include/mach/uncompress.h
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef __MACH_PUV3_UNCOMPRESS_H__
|
||||
#define __MACH_PUV3_UNCOMPRESS_H__
|
||||
|
||||
#include "hardware.h"
|
||||
#include "ocd.h"
|
||||
|
||||
extern char input_data[];
|
||||
extern char input_data_end[];
|
||||
|
||||
static void arch_decomp_puts(const char *ptr)
|
||||
{
|
||||
char c;
|
||||
|
||||
while ((c = *ptr++) != '\0') {
|
||||
if (c == '\n')
|
||||
putc('\r');
|
||||
putc(c);
|
||||
}
|
||||
}
|
||||
#define ARCH_HAVE_DECOMP_PUTS
|
||||
|
||||
#endif /* __MACH_PUV3_UNCOMPRESS_H__ */
|
||||
Loading…
Reference in a new issue