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Diffstat (limited to 'payloads/libpayload/arch/mips/head.S')
-rw-r--r-- | payloads/libpayload/arch/mips/head.S | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/payloads/libpayload/arch/mips/head.S b/payloads/libpayload/arch/mips/head.S deleted file mode 100644 index 203e0ae1bf..0000000000 --- a/payloads/libpayload/arch/mips/head.S +++ /dev/null @@ -1,96 +0,0 @@ -/* - * This file is part of the libpayload project. - * - * Copyright (C) 2014 Imagination Technologies - * - * 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; version 2 of the License. - * - * 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. - */ - -#include <arch/cpu.h> - - /* Disable interrupts and mark the kernel mode */ - .macro setup_c0_status clr - .set push - mfc0 $t0, $CP0_STATUS - or $t0, ST0_CU0 | 0x1f | \clr - xor $t0, 0x1f | \clr - mtc0 $t0, $CP0_STATUS - .set noreorder - sll $zero, 3 - .set pop - .endm - - /* Don't reorder instructions */ - .set noreorder - - .align 4 - - .global cb_header_ptr -cb_header_ptr: - .word 0 - - .global old_sp -old_sp: - .word 0 - - - .global _entry, _leave - .text - -/* Our entry point */ -_entry: - - /* - * This function saves off the previous stack and switches us to our - * own execution environment. - */ - - /* Clear watch and cause registers */ - mtc0 $zero, $CP0_WATCHLO - mtc0 $zero, $CP0_WATCHHI - mtc0 $zero, $CP0_CAUSE - - /* Disable interrupts */ - setup_c0_status 0 - - /* Don't use at in synthetic instr. */ - .set noat - - /* Init timer */ - mtc0 $zero, $CP0_COUNT - mtc0 $zero, $CP0_COMPARE - - /* Initialize $gp */ - bal 1f - nop - .word _gp -1: - lw $gp, 0($ra) - - /* Save off the location of the coreboot tables */ - la $at, cb_header_ptr - sw $a0, 0x00($at) - - /* Save old stack pointer */ - la $at, old_sp - sw $sp, 0x00($at) - - /* Setup new stack */ - la $sp, _stack - - /* Let's rock */ - la $a2, start_main - jalr $a2 - nop -_leave: - /* Restore old stack. */ - lw $sp, old_sp - /* Return to the original context. */ - eret |