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>

1 files changed, 38 insertions, 0 deletions

diff --git a/arch/sh/boot/romimage/head.S b/arch/sh/boot/romimage/head.S
index 219bc626dd71..93e779a405ec 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: