a73b93157f
It encourages users from writing to the FSF without giving an address. Linux also prefers to drop that and their checkpatch.pl (that we imported) looks out for that. This is the result of util/scripts/no-fsf-addresses.sh with no further editing. Change-Id: Ie96faea295fe001911d77dbc51e9a6789558fbd6 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: http://review.coreboot.org/11888 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
106 lines
2 KiB
ArmAsm
106 lines
2 KiB
ArmAsm
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2014 Imagination Technologies
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*
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* This program 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; version 2 of the License.
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*
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* This program 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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#include <arch/cpu.h>
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/* Disable interrupts and mark the kernel mode */
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.macro setup_c0_status clr
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.set push
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mfc0 $t0, $CP0_STATUS
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or $t0, ST0_CU0 | 0x1f | \clr
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xor $t0, 0x1f | \clr
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mtc0 $t0, $CP0_STATUS
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.set noreorder
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sll $zero, 3
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.set pop
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.endm
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/* Don't reorder instructions */
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.set noreorder
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.align 4
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.global cb_header_ptr
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cb_header_ptr:
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.word 0
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.global old_sp
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old_sp:
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.word 0
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.global _entry, _leave
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.text
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/* Our entry point */
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_entry:
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/*
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* This function saves off the previous stack and switches us to our
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* own execution environment.
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*/
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/* Clear watch and cause registers */
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mtc0 $zero, $CP0_WATCHLO
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mtc0 $zero, $CP0_WATCHHI
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mtc0 $zero, $CP0_CAUSE
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/* Disable interrupts */
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setup_c0_status 0
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/* Don't use at in synthetic instr. */
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.set noat
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/* Init timer */
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mtc0 $zero, $CP0_COUNT
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mtc0 $zero, $CP0_COMPARE
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/* Initialize $gp */
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bal 1f
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nop
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.word _gp
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1:
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lw $gp, 0($ra)
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/* Clear .bss: start_bss = _edata, end_bss = _end */
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la $t0, _edata
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sw $zero, ($t0)
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la $t1, _end - 4
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clear_bss:
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addiu $t0, 4
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sw $zero, ($t0)
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bne $t0, $t1, clear_bss
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nop
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/* Save off the location of the coreboot tables */
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la $at, cb_header_ptr
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sw $a0, 0x00($at)
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/* Save old stack pointer */
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la $at, old_sp
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sw $sp, 0x00($at)
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/* Setup new stack */
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la $sp, _stack
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/* Let's rock */
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la $a2, start_main
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jalr $a2
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nop
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_leave:
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/* Restore old stack. */
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lw $sp, old_sp
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/* Return to the original context. */
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eret
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