| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| /* 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 |