48 lines
1.4 KiB
ArmAsm
48 lines
1.4 KiB
ArmAsm
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/*
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* This file is part of the coreboot project.
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*
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* Copyright 2014 Google Inc.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* Macro to initialize stack, perform seeding if required and finally call the
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* function provided
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* @stack : Stack address
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* @size : Stack size
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* @seed : Stack seeding required (1=yes/otherwise=no)
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* @func : Function to call after initializing stack
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*/
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.macro stack_init stack, size, seed, func
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/* Check if stack seeding is required */
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mov r0, #\seed
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cmp r0, #1
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bne call_func
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/* Stack seeding */
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ldr r0, \stack
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ldr r1, \size
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sub r0, r0, r1
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ldr r1, \stack
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ldr r2, =0xdeadbeef
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init_stack_loop:
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str r2, [r0]
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add r0, #4
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cmp r0, r1
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bne init_stack_loop
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call_func:
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ldr sp, \stack /* Set up stack pointer */
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bl \func
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.endm
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