2 * Copyright (c) 2015, Linaro Limited
4 * SPDX-License-Identifier: GPL-2.0
6 #ifndef __LINUX_ARM_SMCCC_H
7 #define __LINUX_ARM_SMCCC_H
10 * This file provides common defines for ARM SMC Calling Convention as
12 * http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
15 #define ARM_SMCCC_STD_CALL 0
16 #define ARM_SMCCC_FAST_CALL 1
17 #define ARM_SMCCC_TYPE_SHIFT 31
19 #define ARM_SMCCC_SMC_32 0
20 #define ARM_SMCCC_SMC_64 1
21 #define ARM_SMCCC_CALL_CONV_SHIFT 30
23 #define ARM_SMCCC_OWNER_MASK 0x3F
24 #define ARM_SMCCC_OWNER_SHIFT 24
26 #define ARM_SMCCC_FUNC_MASK 0xFFFF
28 #define ARM_SMCCC_IS_FAST_CALL(smc_val) \
29 ((smc_val) & (ARM_SMCCC_FAST_CALL << ARM_SMCCC_TYPE_SHIFT))
30 #define ARM_SMCCC_IS_64(smc_val) \
31 ((smc_val) & (ARM_SMCCC_SMC_64 << ARM_SMCCC_CALL_CONV_SHIFT))
32 #define ARM_SMCCC_FUNC_NUM(smc_val) ((smc_val) & ARM_SMCCC_FUNC_MASK)
33 #define ARM_SMCCC_OWNER_NUM(smc_val) \
34 (((smc_val) >> ARM_SMCCC_OWNER_SHIFT) & ARM_SMCCC_OWNER_MASK)
36 #define ARM_SMCCC_CALL_VAL(type, calling_convention, owner, func_num) \
37 (((type) << ARM_SMCCC_TYPE_SHIFT) | \
38 ((calling_convention) << ARM_SMCCC_CALL_CONV_SHIFT) | \
39 (((owner) & ARM_SMCCC_OWNER_MASK) << ARM_SMCCC_OWNER_SHIFT) | \
40 ((func_num) & ARM_SMCCC_FUNC_MASK))
42 #define ARM_SMCCC_OWNER_ARCH 0
43 #define ARM_SMCCC_OWNER_CPU 1
44 #define ARM_SMCCC_OWNER_SIP 2
45 #define ARM_SMCCC_OWNER_OEM 3
46 #define ARM_SMCCC_OWNER_STANDARD 4
47 #define ARM_SMCCC_OWNER_TRUSTED_APP 48
48 #define ARM_SMCCC_OWNER_TRUSTED_APP_END 49
49 #define ARM_SMCCC_OWNER_TRUSTED_OS 50
50 #define ARM_SMCCC_OWNER_TRUSTED_OS_END 63
52 #define ARM_SMCCC_QUIRK_NONE 0
53 #define ARM_SMCCC_QUIRK_QCOM_A6 1 /* Save/restore register a6 */
57 #include <linux/linkage.h>
58 #include <linux/types.h>
60 * struct arm_smccc_res - Result from SMC/HVC call
61 * @a0-a3 result values from registers 0 to 3
63 struct arm_smccc_res {
71 * struct arm_smccc_quirk - Contains quirk information
72 * @id: quirk identification
73 * @state: quirk specific information
74 * @a6: Qualcomm quirk entry for returning post-smc call contents of a6
76 struct arm_smccc_quirk {
84 * __arm_smccc_smc() - make SMC calls
85 * @a0-a7: arguments passed in registers 0 to 7
86 * @res: result values from registers 0 to 3
87 * @quirk: points to an arm_smccc_quirk, or NULL when no quirks are required.
89 * This function is used to make SMC calls following SMC Calling Convention.
90 * The content of the supplied param are copied to registers 0 to 7 prior
91 * to the SMC instruction. The return values are updated with the content
92 * from register 0 to 3 on return from the SMC instruction. An optional
93 * quirk structure provides vendor specific behavior.
95 asmlinkage void __arm_smccc_smc(unsigned long a0, unsigned long a1,
96 unsigned long a2, unsigned long a3, unsigned long a4,
97 unsigned long a5, unsigned long a6, unsigned long a7,
98 struct arm_smccc_res *res, struct arm_smccc_quirk *quirk);
101 * __arm_smccc_hvc() - make HVC calls
102 * @a0-a7: arguments passed in registers 0 to 7
103 * @res: result values from registers 0 to 3
104 * @quirk: points to an arm_smccc_quirk, or NULL when no quirks are required.
106 * This function is used to make HVC calls following SMC Calling
107 * Convention. The content of the supplied param are copied to registers 0
108 * to 7 prior to the HVC instruction. The return values are updated with
109 * the content from register 0 to 3 on return from the HVC instruction. An
110 * optional quirk structure provides vendor specific behavior.
112 asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
113 unsigned long a2, unsigned long a3, unsigned long a4,
114 unsigned long a5, unsigned long a6, unsigned long a7,
115 struct arm_smccc_res *res, struct arm_smccc_quirk *quirk);
117 #define arm_smccc_smc(...) __arm_smccc_smc(__VA_ARGS__, NULL)
119 #define arm_smccc_smc_quirk(...) __arm_smccc_smc(__VA_ARGS__)
121 #define arm_smccc_hvc(...) __arm_smccc_hvc(__VA_ARGS__, NULL)
123 #define arm_smccc_hvc_quirk(...) __arm_smccc_hvc(__VA_ARGS__)
125 #endif /*__ASSEMBLY__*/
126 #endif /*__LINUX_ARM_SMCCC_H*/