diff options
author | Geoff Levand <geoffrey.levand@am.sony.com> | 2008-03-27 20:41:45 (GMT) |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2008-04-01 09:43:07 (GMT) |
commit | 5761eaa3a5ae3c7ea796add73b86176b7c963cca (patch) | |
tree | 8b2b5f292059738216202b4b5480cdc02bd925d0 /arch/powerpc/boot/wrapper | |
parent | 23afcb4e0061c591776a3350db89512d085397c2 (diff) | |
download | linux-fsl-qoriq-5761eaa3a5ae3c7ea796add73b86176b7c963cca.tar.xz |
[POWERPC] PS3: Bootwrapper improvements
Improve the debugging support of the PS3 bootwraper code:
o Increase the size of the PS3 bootwrapper overlay from 256 to 512 bytes to
allow for more debugging code in the overlay.
o Use the dot symbol to set the size of __system_reset_overlay. The
assembler will then emit an error if the overlay code is too big.
o Remove some unused instructions.
o Update the text describing the PS3 bootwrapper overlay.
o Add a check for null pointer writes.
o Change hcall return value from s64.
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/boot/wrapper')
-rwxr-xr-x | arch/powerpc/boot/wrapper | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper index 03b474b..087e120 100755 --- a/arch/powerpc/boot/wrapper +++ b/arch/powerpc/boot/wrapper @@ -298,15 +298,16 @@ treeboot*) exit 0 ;; ps3) - # The ps3's loader supports loading gzipped binary images from flash - # rom to addr zero. The loader enters the image at addr 0x100. A - # bootwrapper overlay is use to arrange for the kernel to be loaded - # to addr zero and to have a suitable bootwrapper entry at 0x100. - # To construct the rom image, 0x100 bytes from offset 0x100 in the - # kernel is copied to the bootwrapper symbol __system_reset_kernel. - # The 0x100 bytes at the bootwrapper symbol __system_reset_overlay is - # then copied to offset 0x100. At runtime the bootwrapper program - # copies the 0x100 bytes at __system_reset_kernel to addr 0x100. + # The ps3's loader supports loading a gzipped binary image from flash + # rom to ram addr zero. The loader then enters the system reset + # vector at addr 0x100. A bootwrapper overlay is used to arrange for + # a binary image of the kernel to be at addr zero, and yet have a + # suitable bootwrapper entry at 0x100. To construct the final rom + # image 512 bytes from offset 0x100 is copied to the bootwrapper + # place holder at symbol __system_reset_kernel. The 512 bytes of the + # bootwrapper entry code at symbol __system_reset_overlay is then + # copied to offset 0x100. At runtime the bootwrapper program copies + # the data at __system_reset_kernel back to addr 0x100. system_reset_overlay=0x`${CROSS}nm "$ofile" \ | grep ' __system_reset_overlay$' \ @@ -317,7 +318,7 @@ ps3) | cut -d' ' -f1` system_reset_kernel=`printf "%d" $system_reset_kernel` overlay_dest="256" - overlay_size="256" + overlay_size="512" ${CROSS}objcopy -O binary "$ofile" "$ofile.bin" |