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