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2004-10-11 Hollis Blanchard <hollis@penguinppc.org>

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* boot/powerpc/ieee1275/cmain.c (grub_ieee1275_flags): New global.
    (cmain): Accept 3 parameters. Test for 0xdeadbeef, indicating Old
    World Macintosh. If Old Wold, set flag in grub_ieee1275_flags; claim
    Open Firmware's memory for it; claim memory from _start to _end.
    * boot/powerpc/ieee1275/crt0.S (__bss_start): New extern.
    (_end): New extern.
    (_start): Zero BSS from __bss_start to _end.
    * include/grub/powerpc/ieee1275/ieee1275.h (grub_ieee1275_flags):
    New extern.
    (GRUB_IEEE1275_NO_PARTITION_0): New #define.
This commit is contained in:
hollisb 2004-10-12 03:56:10 +00:00
parent 4d61feb07b
commit 4512e4f355
4 changed files with 59 additions and 5 deletions
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18
boot/powerpc/ieee1275/crt0.S
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@ -32,7 +32,10 @@
.long 0xffffffff /* virt-base */
.long 0xffffffff /* virt-size */
.long 0x00030000 /* load-base */
.extern __bss_start
.extern _end
.text
.align 2
.globl _start
@ -43,9 +46,18 @@ _start:
li 2, 0
li 13, 0
mr 3, 5
/* Stage1 won't zero BSS for us. In other cases, why not do it again? */
lis 6, (__bss_start - 4)@h
ori 6, 6, (__bss_start - 4)@l
lis 7, (_end - 4)@h
ori 7, 7, (_end - 4)@l
subf 7, 6, 7
srwi 7, 7, 2 /* We store 4 bytes at a time. */
mtctr 7
2: stwu 2, 4(6) /* We know r2 is already 0 from above. */
bdnz 2b
bl cmain
1: b 1b