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authornbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2006-06-07 23:45:42 +0000
committernbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2006-06-07 23:45:42 +0000
commit0d2d5b055d824a8eb822f29181aed5435fc3c045 (patch)
tree61eb4a590e1bd3c4e7837b17ffeac18cd5efb07f /target
parent9e24eb2b14080e290e436deffd442c87b1d2c37e (diff)
generic lzma loader: add support for memory copying, preserve prom arguments
git-svn-id: svn://svn.openwrt.org/openwrt/branches/buildroot-ng/openwrt@3908 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target')
-rw-r--r--target/linux/image/generic/lzma-loader/Makefile3
-rw-r--r--target/linux/image/generic/lzma-loader/src/Makefile29
-rw-r--r--target/linux/image/generic/lzma-loader/src/decompress.c9
-rw-r--r--target/linux/image/generic/lzma-loader/src/lzma-copy.lds.in20
-rw-r--r--target/linux/image/generic/lzma-loader/src/lzma.lds.in3
-rw-r--r--target/linux/image/generic/lzma-loader/src/start.S28
6 files changed, 80 insertions, 12 deletions
diff --git a/target/linux/image/generic/lzma-loader/Makefile b/target/linux/image/generic/lzma-loader/Makefile
index 089254bba..3de04a81a 100644
--- a/target/linux/image/generic/lzma-loader/Makefile
+++ b/target/linux/image/generic/lzma-loader/Makefile
@@ -17,7 +17,8 @@ $(PKG_BUILD_DIR)/lzma.elf: $(PKG_BUILD_DIR)/.prepared $(PKG_BUILD_DIR)/vmlinux.l
LD=$(TARGET_CROSS)ld CROSS_COMPILE=$(TARGET_CROSS) \
RAMSIZE=$(RAMSIZE) \
LOADADDR=$(LOADADDR) \
- KERNEL_ENTRY=$(KERNEL_ENTRY)
+ KERNEL_ENTRY=$(KERNEL_ENTRY) \
+ IMAGE_COPY=$(IMAGE_COPY)
$(PKG_BUILD_DIR)/vmlinux.lzma: $(KDIR)/vmlinux.lzma
diff --git a/target/linux/image/generic/lzma-loader/src/Makefile b/target/linux/image/generic/lzma-loader/src/Makefile
index 8dfd76a6a..54356889f 100644
--- a/target/linux/image/generic/lzma-loader/src/Makefile
+++ b/target/linux/image/generic/lzma-loader/src/Makefile
@@ -1,9 +1,16 @@
LOADADDR = 0x80400000 # RAM start + 4M
KERNEL_ENTRY = 0x80001000
RAMSIZE = 0x00100000 # 1MB
+IMAGE_COPY:=0
CROSS_COMPILE = mips-linux-
+OBJCOPY:= $(CROSS_COMPILE)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S
+CFLAGS := -fno-builtin -Os -G 0 -ffunction-sections -mno-abicalls -fno-pic -mabi=32 -march=mips32 -Wa,-32 -Wa,-march=mips32 -Wa,-mips32 -Wa,--trap -Wall -DRAMSIZE=${RAMSIZE} -DKERNEL_ENTRY=${KERNEL_ENTRY} -D_LZMA_IN_CB
+ifeq ($(IMAGE_COPY),1)
+CFLAGS += -DLOADADDR=${LOADADDR} -DIMAGE_COPY=1
+endif
+
.S.s:
$(CPP) $(CFLAGS) $< -o $*.s
.S.o:
@@ -13,12 +20,8 @@ CROSS_COMPILE = mips-linux-
CC = $(CROSS_COMPILE)gcc
LD = $(CROSS_COMPILE)ld
-OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
-CFLAGS = -fno-builtin -Os -G 0 -mno-abicalls -fno-pic -Wall -DRAMSIZE=${RAMSIZE} -DKERNEL_ENTRY=${KERNEL_ENTRY} -D_LZMA_IN_CB
-# CFLAGS = -fno-builtin -Os -G 0 -mno-abicalls -fno-pic -Wall -DRAMSIZE=${RAMSIZE}
-
O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
# Drop some uninteresting sections in the kernel.
@@ -26,17 +29,29 @@ O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
drop-sections = .reginfo .mdebug .comment
strip-flags = $(addprefix --remove-section=,$(drop-sections))
-
all : lzma.elf
lzma.lds: lzma.lds.in
- sed -e 's,@LOADADDR@,$(LOADADDR),g' $< >$@
+ sed -e 's,@LOADADDR@,$(LOADADDR),g' -e 's,@ENTRY@,_start,g' $< >$@
kernel.o: vmlinux.lzma lzma.lds
$(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $<
+ifeq ($(IMAGE_COPY),1)
+lzma.o: decompress.o LzmaDecode.o kernel.o
+ sed -e 's,@LOADADDR@,$(LOADADDR),g' -e 's,@ENTRY@,entry,g' lzma.lds.in >lzma-stage2.lds
+ $(LD) -static --no-warn-mismatch -e entry -Tlzma-stage2.lds -o temp-$@ $^
+ $(OBJCOPY) temp-$@ lzma.tmp
+ @echo "SECTIONS { .data : { code_start = .; *(.data) code_stop = .; }}" > lzma-data.lds
+ $(LD) -no-warn-mismatch -T lzma-data.lds -r -o $@ -b binary lzma.tmp --oformat $(O_FORMAT)
+
+lzma.elf: start.o lzma.o
+ sed -e 's,@LOADADDR@,$(KERNEL_ENTRY),g' lzma-copy.lds.in >lzma-copy.lds
+ $(LD) -s -Tlzma-copy.lds -o $@ $^
+else
lzma.elf: start.o decompress.o LzmaDecode.o kernel.o
$(LD) -s -Tlzma.lds -o $@ $^
+endif
clean:
- rm -f *.o lzma.elf
+ rm -f *.o lzma.elf *.tmp *.lds
diff --git a/target/linux/image/generic/lzma-loader/src/decompress.c b/target/linux/image/generic/lzma-loader/src/decompress.c
index f602276dd..4ed432d1a 100644
--- a/target/linux/image/generic/lzma-loader/src/decompress.c
+++ b/target/linux/image/generic/lzma-loader/src/decompress.c
@@ -106,6 +106,13 @@ void entry(unsigned long icache_size, unsigned long icache_lsize,
{
unsigned int i; /* temp value */
unsigned int osize; /* uncompressed size */
+ volatile unsigned int arg0, arg1, arg2, arg3;
+
+ /* restore argument registers */
+ __asm__ __volatile__ ("ori %0, $12, 0":"=r"(arg0));
+ __asm__ __volatile__ ("ori %0, $13, 0":"=r"(arg1));
+ __asm__ __volatile__ ("ori %0, $14, 0":"=r"(arg2));
+ __asm__ __volatile__ ("ori %0, $15, 0":"=r"(arg3));
ILzmaInCallback callback;
CLzmaDecoderState vs;
@@ -142,6 +149,6 @@ void entry(unsigned long icache_size, unsigned long icache_lsize,
blast_icache(icache_size, icache_lsize);
/* Jump to load address */
- ((void (*)(void)) KERNEL_ENTRY)();
+ ((void (*)(int a0, int a1, int a2, int a3)) KERNEL_ENTRY)(arg0, arg1, arg2, arg3);
}
}
diff --git a/target/linux/image/generic/lzma-loader/src/lzma-copy.lds.in b/target/linux/image/generic/lzma-loader/src/lzma-copy.lds.in
new file mode 100644
index 000000000..fbc87ab8e
--- /dev/null
+++ b/target/linux/image/generic/lzma-loader/src/lzma-copy.lds.in
@@ -0,0 +1,20 @@
+OUTPUT_ARCH(mips)
+ENTRY(_start)
+SECTIONS
+{
+ /* Read-only sections, merged into text segment: */
+ . = @LOADADDR@;
+ .text :
+ {
+ _ftext = . ;
+ *(.text)
+ *(.rodata)
+ } =0
+
+ .reginfo : { *(.reginfo) }
+
+ .bss :
+ {
+ *(.bss)
+ }
+}
diff --git a/target/linux/image/generic/lzma-loader/src/lzma.lds.in b/target/linux/image/generic/lzma-loader/src/lzma.lds.in
index 5ac555bf7..6021cec01 100644
--- a/target/linux/image/generic/lzma-loader/src/lzma.lds.in
+++ b/target/linux/image/generic/lzma-loader/src/lzma.lds.in
@@ -1,5 +1,5 @@
OUTPUT_ARCH(mips)
-ENTRY(_start)
+ENTRY(@ENTRY@)
SECTIONS
{
/* Read-only sections, merged into text segment: */
@@ -7,6 +7,7 @@ SECTIONS
.text :
{
_ftext = . ;
+ *(.text.entry)
*(.text)
*(.rodata)
lzma_start = .;
diff --git a/target/linux/image/generic/lzma-loader/src/start.S b/target/linux/image/generic/lzma-loader/src/start.S
index 37c7ca36d..9a85c4c35 100644
--- a/target/linux/image/generic/lzma-loader/src/start.S
+++ b/target/linux/image/generic/lzma-loader/src/start.S
@@ -34,10 +34,30 @@ LEAF(_start)
.set mips32
.set noreorder
+ /* save argument registers */
+ move t4, a0
+ move t5, a1
+ move t6, a2
+ move t7, a3
+
/* set up stack */
li sp, 0xa0000000 + RAMSIZE - 16
-
-
+
+#ifdef IMAGE_COPY
+ /* Copy decompressor code to the right place */
+ li t2, LOADADDR
+ add a0, t2, 0
+ la a1, code_start
+ la a2, code_stop
+$L1:
+ lw t0, 0(a1)
+ sw t0, 0(a0)
+ add a1, 4
+ add a0, 4
+ blt a1, a2, $L1
+ nop
+#endif
+
/* At this point we need to invalidate dcache and */
/* icache before jumping to new code */
@@ -128,7 +148,11 @@ noic:
move a0,s3 /* icache line size */
move a1,s4 /* icache size */
move a2,s1 /* dcache line size */
+#ifdef IMAGE_COPY
+ jal t2
+#else
jal entry
+#endif
move a3,s2 /* dcache size */
.set reorder