78 lines
2 KiB
ArmAsm
78 lines
2 KiB
ArmAsm
|
/* crt0.S - Startup code for the Sparc64. */
|
||
|
|
/*
|
||
|
|
* GRUB -- GRand Unified Bootloader
|
||
|
|
* Copyright (C) 2009 Free Software Foundation, Inc.
|
||
|
|
*
|
||
|
|
* GRUB 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 3 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
#include <grub/symbol.h>
|
||
|
|
#include <grub/machine/kernel.h>
|
||
|
|
|
||
|
|
.text
|
||
|
|
.align 4
|
||
|
|
.globl _start
|
||
|
|
_start:
|
||
|
|
ba codestart
|
||
|
|
nop
|
||
|
|
|
||
|
|
. = EXT_C(_start) + GRUB_KERNEL_MACHINE_TOTAL_MODULE_SIZE
|
||
|
|
|
||
|
|
VARIABLE(grub_total_module_size)
|
||
|
|
.word 0
|
||
|
|
VARIABLE(grub_kernel_image_size)
|
||
|
|
.word 0
|
||
|
|
VARIABLE(grub_compressed_size)
|
||
|
|
.word 0
|
||
|
|
VARIABLE(grub_prefix)
|
||
|
|
/* to be filled by grub-mkimage */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Leave some breathing room for the prefix.
|
||
|
|
*/
|
||
|
|
|
||
|
|
. = EXT_C(_start) + GRUB_KERNEL_MACHINE_DATA_END
|
||
|
|
|
||
|
|
codestart:
|
||
|
|
/* Copy the modules past the end of the kernel image.
|
||
|
|
* They are currently sitting in the BSS.
|
||
|
|
*/
|
||
|
|
sethi %hi(__bss_start), %o2
|
||
|
|
or %o2, %lo(__bss_start), %o2
|
||
|
|
sethi %hi(_end), %o3
|
||
|
|
or %o3, %lo(_end), %o3
|
||
|
|
sethi %hi(grub_total_module_size), %o4
|
||
|
|
lduw [%o4 + %lo(grub_total_module_size)], %o4
|
||
|
|
1: lduw [%o2], %o5
|
||
|
|
stw %o5, [%o3]
|
||
|
|
subcc %o4, 4, %o4
|
||
|
|
add %o2, 4, %o2
|
||
|
|
bne,pt %icc, 1b
|
||
|
|
add %o3, 4, %o3
|
||
|
|
|
||
|
|
/* Now it's safe to clear out the BSS. */
|
||
|
|
sethi %hi(__bss_start), %o2
|
||
|
|
or %o2, %lo(__bss_start), %o2
|
||
|
|
sethi %hi(_end), %o3
|
||
|
|
or %o3, %lo(_end), %o3
|
||
|
|
1: stx %g0, [%o2]
|
||
|
|
add %o2, 8, %o2
|
||
|
|
cmp %o2, %o3
|
||
|
|
blt,pt %xcc, 1b
|
||
|
|
nop
|
||
|
|
sethi %hi(grub_ieee1275_entry_fn), %o2
|
||
|
|
stx %o0, [%o2 + %lo(grub_ieee1275_entry_fn)]
|
||
|
|
call grub_main
|
||
|
|
nop
|
||
|
|
1: ba,a 1b
|