diff options
Diffstat (limited to 'arch/powerpc/boot/ps3-head.S')
| -rw-r--r-- | arch/powerpc/boot/ps3-head.S | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/arch/powerpc/boot/ps3-head.S b/arch/powerpc/boot/ps3-head.S index a55c2735f75..b6fcbaf5027 100644 --- a/arch/powerpc/boot/ps3-head.S +++ b/arch/powerpc/boot/ps3-head.S @@ -27,8 +27,9 @@ /* * __system_reset_overlay - The PS3 first stage entry. * - * The bootwraper build script copies the 0x100 bytes at symbol - * __system_reset_overlay to offset 0x100 of the rom image. + * The bootwraper build script copies the 512 bytes at symbol + * __system_reset_overlay to offset 0x100 of the rom image. This symbol + * must occupy 512 or less bytes. * * The PS3 has a single processor with two threads. */ @@ -47,8 +48,6 @@ __system_reset_overlay: mfspr r3, 0x88 cntlzw. r3, r3 - li r4, 0 - li r5, 0 beq 1f /* Secondary goes to __secondary_hold in kernel. */ @@ -57,8 +56,14 @@ __system_reset_overlay: mtctr r4 bctr - /* Primary delays then goes to _zimage_start in wrapper. */ 1: + /* Save the value at addr zero for a null pointer write check later. */ + + li r4, 0 + lwz r3, 0(r4) + + /* Primary delays then goes to _zimage_start in wrapper. */ + or 31, 31, 31 /* db16cyc */ or 31, 31, 31 /* db16cyc */ @@ -67,16 +72,18 @@ __system_reset_overlay: mtctr r4 bctr + . = __system_reset_overlay + 512 + /* * __system_reset_kernel - Place holder for the kernel reset vector. * - * The bootwrapper build script copies 0x100 bytes from offset 0x100 + * The bootwrapper build script copies 512 bytes from offset 0x100 * of the rom image to the symbol __system_reset_kernel. At runtime - * the bootwrapper program copies the 0x100 bytes at __system_reset_kernel - * to ram address 0x100. This symbol must occupy 0x100 bytes. + * the bootwrapper program copies the 512 bytes at __system_reset_kernel + * to ram address 0x100. This symbol must occupy 512 bytes. */ .globl __system_reset_kernel __system_reset_kernel: - . = __system_reset_kernel + 0x100 + . = __system_reset_kernel + 512 |