1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (c) 2015, Linaro Limited
4 */
5 #include <linux/linkage.h>
6
7 #include <asm/opcodes-sec.h>
8 #include <asm/opcodes-virt.h>
9 #include <asm/unwind.h>
10
11 /*
12 * Wrap c macros in asm macros to delay expansion until after the
13 * SMCCC asm macro is expanded.
14 */
15 .macro SMCCC_SMC
16 __SMC(0)
17 .endm
18
19 .macro SMCCC_HVC
20 __HVC(0)
21 .endm
22
23 .macro SMCCC instr
24 UNWIND( .fnstart)
25 mov r12, sp
26 push {r4-r7}
27 UNWIND( .save {r4-r7})
28 ldm r12, {r4-r7}
29 \instr
30 pop {r4-r7}
31 ldr r12, [sp, #(4 * 4)]
32 stm r12, {r0-r3}
33 bx lr
34 UNWIND( .fnend)
35 .endm
36
37 /*
38 * void smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2,
39 * unsigned long a3, unsigned long a4, unsigned long a5,
40 * unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
41 * struct arm_smccc_quirk *quirk)
42 */
43 ENTRY(__arm_smccc_smc)
44 SMCCC SMCCC_SMC
45 ENDPROC(__arm_smccc_smc)
46
47 /*
48 * void smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2,
49 * unsigned long a3, unsigned long a4, unsigned long a5,
50 * unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
51 * struct arm_smccc_quirk *quirk)
52 */
53 ENTRY(__arm_smccc_hvc)
54 SMCCC SMCCC_HVC
55 ENDPROC(__arm_smccc_hvc)