| /* SPDX-License-Identifier: GPL-2.0 */ | |
| /* | |
| * Copyright (C) 2019 MediaTek Inc. | |
| * Author: Mingming Lee <mingming.lee@mediatek.com> | |
| */ | |
| /* | |
| * Switch from AArch64 EL2 to AArch32 EL2 | |
| * @param inputs: | |
| * x0: argument, zero | |
| * x1: machine nr | |
| * x2: fdt address | |
| * x3: input argument | |
| * x4: kernel entry point | |
| * @param outputs for secure firmware: | |
| * x0: function id | |
| * x1: kernel entry point | |
| * x2: machine nr | |
| * x3: fdt address | |
| */ | |
| .global armv8_el2_to_aarch32 | |
| armv8_el2_to_aarch32: | |
| mov x3, x2 | |
| mov x2, x1 | |
| mov x1, x4 | |
| mov x4, #0 | |
| /* Define in src\bsp\trustzone\atf\v1.2\ */ | |
| /* mt8xxx\plat\mediatek\common\sip_svc.h */ | |
| /* MTK_SIP_KERNEL_BOOT_AARCH64 for U-BOOT-64 to KERNEL*/ | |
| ldr x0, =0xC2000200 | |
| SMC #0 | |
| ret |