| /* 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 |
