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authorMagnus Damm <damm@opensource.se>2009-12-04 06:42:35 +0000
committerPaul Mundt <lethal@linux-sh.org>2009-12-04 16:26:20 +0900
commit6a5a0b9139b19dd1a107870269a35bc9cf18d2dc (patch)
tree6212ed4ee2d0cc3f84edd26173bad5c4d6470338 /arch/sh/boot
parent6e8a0d11a088ed51b1b649d3a1127a7bda3700a0 (diff)
downloadvexpress-lsk-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/Makefile12
-rw-r--r--arch/sh/boot/romimage/head.S38
2 files changed, 47 insertions, 3 deletions
diff --git a/arch/sh/boot/romimage/Makefile b/arch/sh/boot/romimage/Makefile
index 5806eee84f6..f473a24a2d9 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 219bc626dd7..93e779a405e 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: