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| author | Magnus Damm <damm@opensource.se> | 2009-12-04 06:42:35 +0000 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-12-04 16:26:20 +0900 |
| commit | 6a5a0b9139b19dd1a107870269a35bc9cf18d2dc (patch) | |
| tree | 6212ed4ee2d0cc3f84edd26173bad5c4d6470338 /arch/sh/boot | |
| parent | 6e8a0d11a088ed51b1b649d3a1127a7bda3700a0 (diff) | |
| download | op-kernel-dev-6a5a0b9139b19dd1a107870269a35bc9cf18d2dc.zip op-kernel-dev-6a5a0b9139b19dd1a107870269a35bc9cf18d2dc.tar.gz | |
sh: include empty zero page in romImage
This patch updates the romImage code to include the
empty_zero_page contents from vmlinux. Without this
patch the empty zero page is lef uninitialized.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/boot')
| -rw-r--r-- | arch/sh/boot/romimage/Makefile | 12 | ||||
| -rw-r--r-- | arch/sh/boot/romimage/head.S | 38 |
2 files changed, 47 insertions, 3 deletions
diff --git a/arch/sh/boot/romimage/Makefile b/arch/sh/boot/romimage/Makefile index 5806eee..f473a24 100644 --- a/arch/sh/boot/romimage/Makefile +++ b/arch/sh/boot/romimage/Makefile @@ -4,16 +4,22 @@ # create an image suitable for burning to flash from zImage # -targets := vmlinux head.o +targets := vmlinux head.o zeropage.bin piggy.o OBJECTS = $(obj)/head.o -LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext 0 -e romstart +LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext 0 -e romstart \ + -T $(obj)/../../kernel/vmlinux.lds $(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o FORCE $(call if_changed,ld) @: +OBJCOPYFLAGS += -j .empty_zero_page + +$(obj)/zeropage.bin: vmlinux FORCE + $(call if_changed,objcopy) + LDFLAGS_piggy.o := -r --format binary --oformat $(ld-bfd) -T -$(obj)/piggy.o: $(obj)/vmlinux.scr arch/sh/boot/zImage FORCE +$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/zeropage.bin arch/sh/boot/zImage FORCE $(call if_changed,ld) diff --git a/arch/sh/boot/romimage/head.S b/arch/sh/boot/romimage/head.S index 219bc62..93e779a 100644 --- a/arch/sh/boot/romimage/head.S +++ b/arch/sh/boot/romimage/head.S @@ -5,6 +5,44 @@ */ .text + #include <asm/page.h> + .global romstart romstart: + /* include board specific setup code */ #include <mach/romimage.h> + + /* copy the empty_zero_page contents to where vmlinux expects it */ + mova empty_zero_page_src, r0 + mov.l empty_zero_page_dst, r1 + mov #(PAGE_SHIFT - 4), r4 + mov #1, r3 + shld r4, r3 /* r3 = PAGE_SIZE / 16 */ + +1: + mov.l @r0, r4 + mov.l @(4, r0), r5 + mov.l @(8, r0), r6 + mov.l @(12, r0), r7 + add #16,r0 + mov.l r4, @r1 + mov.l r5, @(4, r1) + mov.l r6, @(8, r1) + mov.l r7, @(12, r1) + dt r3 + add #16,r1 + bf 1b + + /* jump to the zImage entry point located after the zero page data */ + mov #PAGE_SHIFT, r4 + mov #1, r1 + shld r4, r1 + mova empty_zero_page_src, r0 + add r1, r0 + jmp @r0 + nop + + .align 2 +empty_zero_page_dst: + .long _text +empty_zero_page_src: |
