2 * Copyright (c) 2015, Linaro Limited
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.
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.
14 #ifndef __LINUX_ARM_SMCCC_H
15 #define __LINUX_ARM_SMCCC_H
17 #include <linux/linkage.h>
18 #include <linux/types.h>
21 * This file provides common defines for ARM SMC Calling Convention as
23 * http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
26 #define ARM_SMCCC_STD_CALL 0
27 #define ARM_SMCCC_FAST_CALL 1
28 #define ARM_SMCCC_TYPE_SHIFT 31
30 #define ARM_SMCCC_SMC_32 0
31 #define ARM_SMCCC_SMC_64 1
32 #define ARM_SMCCC_CALL_CONV_SHIFT 30
34 #define ARM_SMCCC_OWNER_MASK 0x3F
35 #define ARM_SMCCC_OWNER_SHIFT 24
37 #define ARM_SMCCC_FUNC_MASK 0xFFFF
39 #define ARM_SMCCC_IS_FAST_CALL(smc_val) \
40 ((smc_val) & (ARM_SMCCC_FAST_CALL << ARM_SMCCC_TYPE_SHIFT))
41 #define ARM_SMCCC_IS_64(smc_val) \
42 ((smc_val) & (ARM_SMCCC_SMC_64 << ARM_SMCCC_CALL_CONV_SHIFT))
43 #define ARM_SMCCC_FUNC_NUM(smc_val) ((smc_val) & ARM_SMCCC_FUNC_MASK)
44 #define ARM_SMCCC_OWNER_NUM(smc_val) \
45 (((smc_val) >> ARM_SMCCC_OWNER_SHIFT) & ARM_SMCCC_OWNER_MASK)
47 #define ARM_SMCCC_CALL_VAL(type, calling_convention, owner, func_num) \
48 (((type) << ARM_SMCCC_TYPE_SHIFT) | \
49 ((calling_convention) << ARM_SMCCC_CALL_CONV_SHIFT) | \
50 (((owner) & ARM_SMCCC_OWNER_MASK) << ARM_SMCCC_OWNER_SHIFT) | \
51 ((func_num) & ARM_SMCCC_FUNC_MASK))
53 #define ARM_SMCCC_OWNER_ARCH 0
54 #define ARM_SMCCC_OWNER_CPU 1
55 #define ARM_SMCCC_OWNER_SIP 2
56 #define ARM_SMCCC_OWNER_OEM 3
57 #define ARM_SMCCC_OWNER_STANDARD 4
58 #define ARM_SMCCC_OWNER_TRUSTED_APP 48
59 #define ARM_SMCCC_OWNER_TRUSTED_APP_END 49
60 #define ARM_SMCCC_OWNER_TRUSTED_OS 50
61 #define ARM_SMCCC_OWNER_TRUSTED_OS_END 63
64 * struct arm_smccc_res - Result from SMC/HVC call
65 * @a0-a3 result values from registers 0 to 3
67 struct arm_smccc_res {
75 * arm_smccc_smc() - make SMC calls
76 * @a0-a7: arguments passed in registers 0 to 7
77 * @res: result values from registers 0 to 3
79 * This function is used to make SMC calls following SMC Calling Convention.
80 * The content of the supplied param are copied to registers 0 to 7 prior
81 * to the SMC instruction. The return values are updated with the content
82 * from register 0 to 3 on return from the SMC instruction.
84 asmlinkage void arm_smccc_smc(unsigned long a0, unsigned long a1,
85 unsigned long a2, unsigned long a3, unsigned long a4,
86 unsigned long a5, unsigned long a6, unsigned long a7,
87 struct arm_smccc_res *res);
90 * arm_smccc_hvc() - make HVC calls
91 * @a0-a7: arguments passed in registers 0 to 7
92 * @res: result values from registers 0 to 3
94 * This function is used to make HVC calls following SMC Calling
95 * Convention. The content of the supplied param are copied to registers 0
96 * to 7 prior to the HVC instruction. The return values are updated with
97 * the content from register 0 to 3 on return from the HVC instruction.
99 asmlinkage void arm_smccc_hvc(unsigned long a0, unsigned long a1,
100 unsigned long a2, unsigned long a3, unsigned long a4,
101 unsigned long a5, unsigned long a6, unsigned long a7,
102 struct arm_smccc_res *res);
104 #endif /*__LINUX_ARM_SMCCC_H*/