diff options
Diffstat (limited to 'src/arch/mips/bootblock.S')
| -rw-r--r-- | src/arch/mips/bootblock.S | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/arch/mips/bootblock.S b/src/arch/mips/bootblock.S new file mode 100644 index 0000000000..dbde803b14 --- /dev/null +++ b/src/arch/mips/bootblock.S @@ -0,0 +1,44 @@ +/* + * This file is part of the coreboot 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. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +.set noreorder /* Prevent assembler from "optimizing" this code. */ + +.section ".start", "ax", %progbits +.globl _start +_start: + /* Set the stack pointer */ + li $sp, CONFIG_BOOTBLOCK_STACK_TOP + + /* + * Initialise the stack to a known value, used later to check for + * overflow. + */ + li $t0, CONFIG_BOOTBLOCK_STACK_BOTTOM + addi $t1, $sp, -4 + li $t2, 0xdeadbeef +1: sw $t2, 0($t0) + bne $t0, $t1, 1b + addi $t0, $t0, 4 + + /* Run main */ + b main + + /* Should never return from main. */ +2: + b 2b |