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b329f95d JW |
1 | /* |
2 | * Copyright (c) 2015, Linaro Limited | |
3 | * | |
4 | * This software is licensed under the terms of the GNU General Public | |
5 | * License version 2, as published by the Free Software Foundation, and | |
6 | * may be copied, distributed, and modified under those terms. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | */ | |
14 | #include <linux/linkage.h> | |
15 | ||
16 | #include <asm/opcodes-sec.h> | |
17 | #include <asm/opcodes-virt.h> | |
18 | #include <asm/unwind.h> | |
19 | ||
20 | /* | |
21 | * Wrap c macros in asm macros to delay expansion until after the | |
22 | * SMCCC asm macro is expanded. | |
23 | */ | |
24 | .macro SMCCC_SMC | |
25 | __SMC(0) | |
26 | .endm | |
27 | ||
28 | .macro SMCCC_HVC | |
29 | __HVC(0) | |
30 | .endm | |
31 | ||
32 | .macro SMCCC instr | |
33 | UNWIND( .fnstart) | |
34 | mov r12, sp | |
35 | push {r4-r7} | |
36 | UNWIND( .save {r4-r7}) | |
37 | ldm r12, {r4-r7} | |
38 | \instr | |
39 | pop {r4-r7} | |
40 | ldr r12, [sp, #(4 * 4)] | |
41 | stm r12, {r0-r3} | |
42 | bx lr | |
43 | UNWIND( .fnend) | |
44 | .endm | |
45 | ||
46 | /* | |
47 | * void smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2, | |
48 | * unsigned long a3, unsigned long a4, unsigned long a5, | |
49 | * unsigned long a6, unsigned long a7, struct arm_smccc_res *res) | |
50 | */ | |
51 | ENTRY(arm_smccc_smc) | |
52 | SMCCC SMCCC_SMC | |
53 | ENDPROC(arm_smccc_smc) | |
54 | ||
55 | /* | |
56 | * void smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2, | |
57 | * unsigned long a3, unsigned long a4, unsigned long a5, | |
58 | * unsigned long a6, unsigned long a7, struct arm_smccc_res *res) | |
59 | */ | |
60 | ENTRY(arm_smccc_hvc) | |
61 | SMCCC SMCCC_HVC | |
62 | ENDPROC(arm_smccc_hvc) |