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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Google Inc.
*
* 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.
*/
/* Macro to initialize stack, perform seeding if required and finally call the
* function provided
* @stack_top : First address above the stack
* @stack_bottom : Lowest address on the stack
* @seed : Stack seeding required (1=yes/otherwise=no)
* @func : Function to call after initializing stack
*/
.macro stack_init stack_top, stack_bottom, seed, func
/* Check if stack seeding is required */
mov r0, #\seed
cmp r0, #1
bne call_func
/* Stack seeding */
ldr r0, =\stack_bottom
ldr r1, =\stack_top
ldr r2, =0xdeadbeef
init_stack_loop:
str r2, [r0]
add r0, #4
cmp r0, r1
bne init_stack_loop
call_func:
ldr sp, =\stack_top /* Set up stack pointer */
bl \func
.endm
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