1 /*
2  * Copyright 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     https://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #define PSCI_SYSTEM_RESET (0x84000009)
20 
21 .macro adr_l, reg:req, sym:req
22 	adrp \reg, \sym
23 	add \reg, \reg, :lo12:\sym
24 .endm
25 
26 .macro mov_i, reg:req, imm:req
27 	movz \reg, :abs_g3:\imm
28 	movk \reg, :abs_g2_nc:\imm
29 	movk \reg, :abs_g1_nc:\imm
30 	movk \reg, :abs_g0_nc:\imm
31 .endm
32 
33 .macro hvc_call func_id:req
34     mov_i x0, \func_id
35     hvc 0
36 .endm
37 
38 .macro reset_or_hang
39 	hvc_call PSCI_SYSTEM_RESET
40 999:	wfi
41 	b 999b
42 .endm
43