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sh: allow romImage data between head.S and the zero page

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Extend the romImage code to allow putting data between
the head.S file and the empty_zero_page. Needed in the
case of more advanced loader code in a separate C file.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2010-05-18 14:42:40 +00:00 committed by Paul Mundt
parent 1238c68432
commit b34bce4553
2 changed files with 10 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/sh/boot/romimage/head.S
View File

@ -13,7 +13,9 @@ romstart:
#include <mach/romimage.h> #include <mach/romimage.h>
/* copy the empty_zero_page contents to where vmlinux expects it */ /* copy the empty_zero_page contents to where vmlinux expects it */
mova empty_zero_page_src, r0 mova extra_data_pos, r0
mov.l extra_data_size, r1
add r1, r0
mov.l empty_zero_page_dst, r1 mov.l empty_zero_page_dst, r1
mov #(PAGE_SHIFT - 4), r4 mov #(PAGE_SHIFT - 4), r4
mov #1, r3 mov #1, r3
@ -37,7 +39,9 @@ romstart:
mov #PAGE_SHIFT, r4 mov #PAGE_SHIFT, r4
mov #1, r1 mov #1, r1
shld r4, r1 shld r4, r1
mova empty_zero_page_src, r0 mova extra_data_pos, r0
add r1, r0
mov.l extra_data_size, r1
add r1, r0 add r1, r0
jmp @r0 jmp @r0
nop nop
@ -45,4 +49,6 @@ romstart:
.align 2 .align 2
empty_zero_page_dst: empty_zero_page_dst:
.long _text .long _text
empty_zero_page_src: extra_data_pos:
extra_data_size:
.long zero_page_pos - extra_data_pos

1
arch/sh/boot/romimage/vmlinux.scr
View File

@ -1,6 +1,7 @@
SECTIONS SECTIONS
{ {
.text : { .text : {
zero_page_pos = .;
*(.data) *(.data)
} }
} }