33 lines
722 B
ArmAsm
33 lines
722 B
ArmAsm
/* 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
|