Merge remote-tracking branch 'lightnvm/for-next'
[deliverable/linux.git] / arch / arm / kernel / smccc-call.S
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 #include <asm/export.h>
20
21 /*
22 * Wrap c macros in asm macros to delay expansion until after the
23 * SMCCC asm macro is expanded.
24 */
25 .macro SMCCC_SMC
26 __SMC(0)
27 .endm
28
29 .macro SMCCC_HVC
30 __HVC(0)
31 .endm
32
33 .macro SMCCC instr
34 UNWIND( .fnstart)
35 mov r12, sp
36 push {r4-r7}
37 UNWIND( .save {r4-r7})
38 ldm r12, {r4-r7}
39 \instr
40 pop {r4-r7}
41 ldr r12, [sp, #(4 * 4)]
42 stm r12, {r0-r3}
43 bx lr
44 UNWIND( .fnend)
45 .endm
46
47 /*
48 * void smccc_smc(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 */
52 ENTRY(arm_smccc_smc)
53 SMCCC SMCCC_SMC
54 ENDPROC(arm_smccc_smc)
55 EXPORT_SYMBOL(arm_smccc_smc)
56
57 /*
58 * void smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2,
59 * unsigned long a3, unsigned long a4, unsigned long a5,
60 * unsigned long a6, unsigned long a7, struct arm_smccc_res *res)
61 */
62 ENTRY(arm_smccc_hvc)
63 SMCCC SMCCC_HVC
64 ENDPROC(arm_smccc_hvc)
65 EXPORT_SYMBOL(arm_smccc_hvc)
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