4512e4f355
* 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.
67 lines
1.8 KiB
ArmAsm
67 lines
1.8 KiB
ArmAsm
/* crt0.S - Startup code for the PowerPC. */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
.section ".note"
|
|
.align 2
|
|
.note_section_header:
|
|
.long 8
|
|
.long 24
|
|
.long 0x1275
|
|
.string "PowerPC"
|
|
.note_descriptor:
|
|
.long 0x0 /* real-mode */
|
|
.long 0xffffffff /* real-base */
|
|
.long 0xffffffff /* real-size */
|
|
.long 0xffffffff /* virt-base */
|
|
.long 0xffffffff /* virt-size */
|
|
.long 0x00030000 /* load-base */
|
|
|
|
.extern __bss_start
|
|
.extern _end
|
|
|
|
.text
|
|
.align 2
|
|
.globl _start
|
|
_start:
|
|
lis 1, init_stack@ha
|
|
la 1, init_stack@l(1)
|
|
addi 1, 1, -32
|
|
|
|
li 2, 0
|
|
li 13, 0
|
|
|
|
/* 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
|
|
|
|
.section ".bss"
|
|
.lcomm _ppc_init_stack, 4096*2, 16
|
|
init_stack:
|
|
|