| /* | |
| * (C) Copyright 2015 Google, Inc | |
| * | |
| * SPDX-License-Identifier: GPL-2.0+ | |
| */ | |
| #include <linux/linkage.h> | |
| .globl SAVE_SP_ADDR | |
| SAVE_SP_ADDR: | |
| .word 0 | |
| /* | |
| * void save_boot_params | |
| * | |
| * Save sp, lr, r1~r12 | |
| */ | |
| ENTRY(save_boot_params) | |
| push {r1-r12, lr} | |
| ldr r0, =SAVE_SP_ADDR | |
| str sp, [r0] | |
| b save_boot_params_ret @ back to my caller | |
| ENDPROC(save_boot_params) | |
| .globl back_to_bootrom | |
| ENTRY(back_to_bootrom) | |
| ldr r0, =SAVE_SP_ADDR | |
| ldr sp, [r0] | |
| mov r0, #0 | |
| pop {r1-r12, pc} | |
| ENDPROC(back_to_bootrom) |