Entry point is now configurable via a Makefile variable. Entry point is detected automatically (Gabor Juhos)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6841 3c298f89-4303-0410-b956-a3cf2f4a3e73master
Florian Fainelli
parent
5218d952cd
commit
75af0330e0
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@ -8,6 +8,9 @@
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include $(TOPDIR)/rules.mk
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LOADER := loader
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BZ_STARTUP_ORG := 0
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PKG_NAME := lzma-loader
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PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
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@ -16,18 +19,19 @@ $(PKG_BUILD_DIR)/.prepared:
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$(CP) ./src/* $(PKG_BUILD_DIR)/
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touch $@
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$(PKG_BUILD_DIR)/loader.gz: $(PKG_BUILD_DIR)/.prepared
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$(PKG_BUILD_DIR)/$(LOADER).gz: $(PKG_BUILD_DIR)/.prepared
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$(MAKE) -C $(PKG_BUILD_DIR) CC="$(TARGET_CC)" \
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LD="$(TARGET_CROSS)ld" CROSS_COMPILE="$(TARGET_CROSS)"
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LD="$(TARGET_CROSS)ld" CROSS_COMPILE="$(TARGET_CROSS)" \
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LOADER=$(LOADER) BZ_STARTUP_ORG=$(BZ_STARTUP_ORG)
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download:
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prepare: $(PKG_BUILD_DIR)/.prepared
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compile: $(PKG_BUILD_DIR)/loader.gz
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compile: $(PKG_BUILD_DIR)/$(LOADER).gz
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install:
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ifneq ($(TARGET),)
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install: compile
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$(CP) $(PKG_BUILD_DIR)/loader.gz $(PKG_BUILD_DIR)/loader.elf $(TARGET)/
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$(CP) $(PKG_BUILD_DIR)/$(LOADER).gz $(PKG_BUILD_DIR)/$(LOADER).elf $(TARGET)/
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endif
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clean:
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@ -16,9 +16,15 @@
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# Copyright 2005 Oleg I. Vdovikin <oleg@cs.msu.su>
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# Cleaned up, modified for lzma support, removed from kernel
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#
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# Copyright 2007 Gabor Juhos <juhosg@freemail.hu>
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# Modified to support user defined entry point address.
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# Added support for make targets with different names
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#
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TEXT_START := 0x80001000
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LOADADDR := 0x80001000
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BZ_TEXT_START := 0x80300000
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BZ_STARTUP_ORG := 0
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LOADER := loader
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OBJCOPY := $(CROSS_COMPILE)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S
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@ -26,52 +32,41 @@ CFLAGS = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
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-fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 -mno-abicalls -fno-pic \
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-ffunction-sections -pipe -mlong-calls -fno-common \
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-mabi=32 -march=mips32 -Wa,-32 -Wa,-march=mips32 -Wa,-mips32 -Wa,--trap
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CFLAGS += -DLOADADDR=$(TEXT_START) -D_LZMA_IN_CB
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CFLAGS += -DLOADADDR=$(LOADADDR) -D_LZMA_IN_CB
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ASFLAGS = $(CFLAGS) -D__ASSEMBLY__ -DBZ_TEXT_START=$(BZ_TEXT_START)
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ASFLAGS = $(CFLAGS) -D__ASSEMBLY__ -DBZ_STARTUP_ORG=$(BZ_STARTUP_ORG)
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SEDFLAGS := s/BZ_TEXT_START/$(BZ_TEXT_START)/;s/TEXT_START/$(TEXT_START)/
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LDFLAGS = -static --gc-sections -no-warn-mismatch
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LDFLAGS += -e startup -Ttext $(BZ_TEXT_START) -T loader.lds.in
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OBJECTS := head.o data.o
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OBJECTS := $(LOADER)-head.o decompress.o LzmaDecode.o
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all: loader.gz loader.elf
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all: $(LOADER).gz $(LOADER).elf
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# Don't build dependencies, this may die if $(CC) isn't gcc
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dep:
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install:
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loader.gz: loader
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decompress.o:
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$(CC) $(CFLAGS) -c decompress.c -o $@
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$(LOADER)-head.o:
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$(CC) $(ASFLAGS) -c head.S -o $@
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$(LOADER).gz: $(LOADER).bin
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gzip -nc9 $< > $@
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loader.elf: loader.o
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$(LOADER).elf: $(LOADER).o
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cp $< $@
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loader: loader.o
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$(OBJCOPY) $< $@
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$(LOADER).bin: $(LOADER).o
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$(OBJCOPY) -O binary $< $@
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loader.o: loader.lds $(OBJECTS)
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$(LD) -static --gc-sections -no-warn-mismatch -T loader.lds -o $@ $(OBJECTS)
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loader.lds: loader.lds.in Makefile
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@sed "$(SEDFLAGS)" < $< > $@
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data.o: data.lds decompress.image
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$(LD) -no-warn-mismatch -T data.lds -r -o $@ -b binary decompress.image -b elf32-tradlittlemips
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data.lds:
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@echo "SECTIONS { .data : { code_start = .; *(.data) code_stop = .; }}" > $@
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decompress.image: decompress
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$(OBJCOPY) $< $@
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decompress: decompress.lds decompress.o LzmaDecode.o
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$(LD) -static --gc-sections -no-warn-mismatch -T decompress.lds -o $@ decompress.o LzmaDecode.o
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decompress.lds: decompress.lds.in Makefile
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@sed "$(SEDFLAGS)" < $< > $@
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$(LOADER).o: $(OBJECTS)
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$(LD) $(LDFLAGS) -o $@ $(OBJECTS)
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mrproper: clean
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clean:
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rm -f loader.gz loader decompress *.lds *.o *.image
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rm -f *.gz *.elf *.bin *.o
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@ -124,8 +124,10 @@ static __inline__ unsigned char get_byte(void)
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return read_byte(0, &buffer, &fake), *buffer;
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}
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int uart_write_str(char * str);
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/* should be the first function */
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void entry(unsigned long reg_a0, unsigned long reg_a1,
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void decompress_entry(unsigned long reg_a0, unsigned long reg_a1,
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unsigned long reg_a2, unsigned long reg_a3,
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unsigned long icache_size, unsigned long icache_lsize,
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unsigned long dcache_size, unsigned long dcache_lsize)
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@ -1,20 +0,0 @@
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OUTPUT_ARCH(mips)
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ENTRY(entry)
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SECTIONS {
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. = BZ_TEXT_START;
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.text : {
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*(.text.entry)
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*(.text)
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*(.rodata)
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}
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.data : {
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*(.data)
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}
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.bss : {
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*(.bss)
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}
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workspace = .;
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}
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@ -1,6 +1,6 @@
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/* Copyright 2007 Gabor Juhos */
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/* Copyright 2007 Gabor Juhos <juhosg@freemail.hu> */
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/* keep original values of the a0,a1,a2,a3 registers */
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/* cache manipulation adapted from Broadcom code */
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/* modifed to support user defined entry point address */
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/* Copyright 2005 Oleg I. Vdovikin (oleg@cs.msu.su) */
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/* cache manipulation adapted from Broadcom code */
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/* idea taken from original bunzip2 decompressor code */
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@ -39,21 +39,44 @@
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#define Index_Writeback_Inv_D 0x01
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.text
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LEAF(startup)
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#if (BZ_STARTUP_ORG)
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.set noreorder
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/* Copy decompressor code to the right place */
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li t0, BZ_TEXT_START
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b startup
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nop
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la t1, code_start
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la t2, code_stop
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$L1:
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lw t3, 0(t1)
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sw t3, 0(t0)
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.org BZ_STARTUP_ORG
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#endif
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LEAF(startup)
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.set noreorder
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move t1, ra # save return address
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la t0, __reloc_label # get linked address of label
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bal __reloc_label # branch and link to label to
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nop # get actual address
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__reloc_label:
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subu t0, ra, t0 # get reloc_delta
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move ra, t1 # restore return address
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beqz t0, __reloc_end # if delta is 0 we are in the right place
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nop
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/* Copy our code to the right place */
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la t1, _code_start # get linked address of _code_start
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la t2, _code_end # get linked address of _code_end
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addu t0, t0, t1 # calculate actual address of _code_start
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__reloc_copy:
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lw t3, 0(t0)
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sw t3, 0(t1)
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add t1, 4
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blt t1, t2, $L1
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blt t1, t2, __reloc_copy
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add t0, 4
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__reloc_end:
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/* At this point we need to invalidate dcache and */
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/* icache before jumping to new code */
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@ -147,7 +170,8 @@ nodc:
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addu t0,s3
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noic:
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li t0, BZ_TEXT_START
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/* Setup new "C" stack */
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la sp, _stack
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addiu sp, -32 /* reserve stack for parameters */
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#if 0
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@ -159,8 +183,12 @@ noic:
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sw s3, 16(sp) /* icache line size */
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sw s4, 20(sp) /* icache size */
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sw s1, 24(sp) /* dcache line size */
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jr t0
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sw s2, 28(sp) /* dcache size */
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/* jump to the decompressor routine */
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la t0, decompress_entry
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jr t0
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nop
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.set reorder
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END(startup)
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END(startup)
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@ -1,17 +1,27 @@
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OUTPUT_ARCH(mips)
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ENTRY(startup)
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SECTIONS {
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. = TEXT_START;
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.text : {
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_code_start = .;
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*(.text)
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*(.text.*)
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*(.rodata)
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*(.rodata.*)
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_code_end = .;
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}
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.data : {
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*(.data)
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*(.data.*)
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}
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.bss : {
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*(.bss)
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*(.bss.*)
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}
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. = ALIGN(16);
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. = . + 8192;
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_stack = .;
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workspace = .;
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}
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