1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (c) 2015, Linaro Limited
4 */
5 #include <linux/linkage.h>
6 #include <linux/arm-smccc.h>
7
8 #include <asm/asm-offsets.h>
9 #include <asm/assembler.h>
10
11 .macro SMCCC instr
12 \instr #0
13 ldr x4, [sp]
14 stp x0, x1, [x4, #ARM_SMCCC_RES_X0
15 stp x2, x3, [x4, #ARM_SMCCC_RES_X2
16 ldr x4, [sp, #8]
17 cbz x4, 1f /* no quirk structure *
18 ldr x9, [x4, #ARM_SMCCC_QUIRK_ID_O
19 cmp x9, #ARM_SMCCC_QUIRK_QCOM_A6
20 b.ne 1f
21 str x6, [x4, ARM_SMCCC_QUIRK_STATE
22 1: ret
23 .endm
24
25 /*
26 * void arm_smccc_smc(unsigned long a0, unsign
27 * unsigned long a3, unsigned l
28 * unsigned long a6, unsigned l
29 * struct arm_smccc_quirk *quir
30 */
31 SYM_FUNC_START(__arm_smccc_smc)
32 SMCCC smc
33 SYM_FUNC_END(__arm_smccc_smc)
34 EXPORT_SYMBOL(__arm_smccc_smc)
35
36 /*
37 * void arm_smccc_hvc(unsigned long a0, unsign
38 * unsigned long a3, unsigned l
39 * unsigned long a6, unsigned l
40 * struct arm_smccc_quirk *quir
41 */
42 SYM_FUNC_START(__arm_smccc_hvc)
43 SMCCC hvc
44 SYM_FUNC_END(__arm_smccc_hvc)
45 EXPORT_SYMBOL(__arm_smccc_hvc)
46
47 .macro SMCCC_1_2 instr
48 /* Save `res` and free a GPR that won'
49 stp x1, x19, [sp, #-16]!
50
51 /* Ensure `args` won't be clobbered wh
52 mov x19, x0
53
54 /* Load the registers x0 - x17 from th
55 ldp x0, x1, [x19, #ARM_SMCCC_1_2_R
56 ldp x2, x3, [x19, #ARM_SMCCC_1_2_R
57 ldp x4, x5, [x19, #ARM_SMCCC_1_2_R
58 ldp x6, x7, [x19, #ARM_SMCCC_1_2_R
59 ldp x8, x9, [x19, #ARM_SMCCC_1_2_R
60 ldp x10, x11, [x19, #ARM_SMCCC_1_2
61 ldp x12, x13, [x19, #ARM_SMCCC_1_2
62 ldp x14, x15, [x19, #ARM_SMCCC_1_2
63 ldp x16, x17, [x19, #ARM_SMCCC_1_2
64
65 \instr #0
66
67 /* Load the `res` from the stack */
68 ldr x19, [sp]
69
70 /* Store the registers x0 - x17 into t
71 stp x0, x1, [x19, #ARM_SMCCC_1_2_R
72 stp x2, x3, [x19, #ARM_SMCCC_1_2_R
73 stp x4, x5, [x19, #ARM_SMCCC_1_2_R
74 stp x6, x7, [x19, #ARM_SMCCC_1_2_R
75 stp x8, x9, [x19, #ARM_SMCCC_1_2_R
76 stp x10, x11, [x19, #ARM_SMCCC_1_2
77 stp x12, x13, [x19, #ARM_SMCCC_1_2
78 stp x14, x15, [x19, #ARM_SMCCC_1_2
79 stp x16, x17, [x19, #ARM_SMCCC_1_2
80
81 /* Restore original x19 */
82 ldp xzr, x19, [sp], #16
83 ret
84 .endm
85
86 /*
87 * void arm_smccc_1_2_hvc(const struct arm_smc
88 * struct arm_smccc_1_2
89 */
90 SYM_FUNC_START(arm_smccc_1_2_hvc)
91 SMCCC_1_2 hvc
92 SYM_FUNC_END(arm_smccc_1_2_hvc)
93 EXPORT_SYMBOL(arm_smccc_1_2_hvc)
94
95 /*
96 * void arm_smccc_1_2_smc(const struct arm_smc
97 * struct arm_smccc_1_2
98 */
99 SYM_FUNC_START(arm_smccc_1_2_smc)
100 SMCCC_1_2 smc
101 SYM_FUNC_END(arm_smccc_1_2_smc)
102 EXPORT_SYMBOL(arm_smccc_1_2_smc)
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