diff options
Diffstat (limited to 'arch/arm/mach-mediatek/mt7988/lowlevel_init.S')
| -rw-r--r-- | arch/arm/mach-mediatek/mt7988/lowlevel_init.S | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm/mach-mediatek/mt7988/lowlevel_init.S b/arch/arm/mach-mediatek/mt7988/lowlevel_init.S new file mode 100644 index 00000000000..2ae3cc48480 --- /dev/null +++ b/arch/arm/mach-mediatek/mt7988/lowlevel_init.S @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020 MediaTek Inc. + * Author: Sam Shih <sam.shih@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 + ldr x0, =0x82000200 + SMC #0 + ret |