55 lines
1.4 KiB
ArmAsm
55 lines
1.4 KiB
ArmAsm
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/* startup.S - Startup code for the MIPS. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/symbol.h>
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#include <grub/cpu/kernel.h>
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#include <grub/machine/memory.h>
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.extern __bss_start
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.extern _end
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.globl __start, _start, start
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__start:
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_start:
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start:
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b codestart
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. = _start + GRUB_KERNEL_CPU_PREFIX
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VARIABLE(grub_prefix)
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/* to be filled by grub-mkelfimage */
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/*
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* Leave some breathing room for the prefix.
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*/
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. = _start + GRUB_KERNEL_CPU_DATA_END
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codestart:
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lui $t1, %hi(__bss_start)
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addiu $t1, %lo(__bss_start)
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lui $t2, %hi(_end)
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addiu $t2, %lo(_end)
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bsscont:
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sb $0,0($t1)
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addiu $t1,$t1,1
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sltu $t3,$t1,$t2
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bne $3, $0, bsscont
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li $sp, GRUB_MACHINE_MEMORY_STACK_HIGH
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b grub_main
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