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https://github.com/AsahiLinux/u-boot
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33 lines
699 B
ArmAsm
33 lines
699 B
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2022 MediaTek Inc.
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* Author: Sam Shih <sam.shih@mediatek.com>
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*/
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/*
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* Switch from AArch64 EL2 to AArch32 EL2
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* @param inputs:
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* x0: argument, zero
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* x1: machine nr
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* x2: fdt address
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* x3: input argument
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* x4: kernel entry point
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* @param outputs for secure firmware:
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* x0: function id
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* x1: kernel entry point
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* x2: machine nr
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* x3: fdt address
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*
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* [1] https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tree/plat/mediatek/common/mtk_sip_svc.c
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*/
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.global armv8_el2_to_aarch32
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armv8_el2_to_aarch32:
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mov x3, x2
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mov x2, x1
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mov x1, x4
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mov x4, #0
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ldr x0, =0x82000200 /* MTK_SIP_KERNEL_BOOT_AARCH32 */
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SMC #0
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ret
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