diff options
Diffstat (limited to 'arch/arm/mach-mediatek/mt8518/lowlevel_init.S')
| -rw-r--r-- | arch/arm/mach-mediatek/mt8518/lowlevel_init.S | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/mach-mediatek/mt8518/lowlevel_init.S b/arch/arm/mach-mediatek/mt8518/lowlevel_init.S new file mode 100644 index 0000000000..ad392120f4 --- /dev/null +++ b/arch/arm/mach-mediatek/mt8518/lowlevel_init.S @@ -0,0 +1,32 @@ +/* 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 |