projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 98dd64f3 JW |
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 | #ifndef __LINUX_ARM_SMCCC_H | |
| 15 | #define __LINUX_ARM_SMCCC_H | |
| 16 | ||
| 17 | #include <linux/linkage.h> | |
| 18 | #include <linux/types.h> | |
| 19 | ||
| 20 | /* | |
| 21 | * This file provides common defines for ARM SMC Calling Convention as | |
| 22 | * specified in | |
| 23 | * http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html | |
| 24 | */ | |
| 25 | ||
| 26 | #define ARM_SMCCC_STD_CALL 0 | |
| 27 | #define ARM_SMCCC_FAST_CALL 1 | |
| 28 | #define ARM_SMCCC_TYPE_SHIFT 31 | |
| 29 | ||
| 30 | #define ARM_SMCCC_SMC_32 0 | |
| 31 | #define ARM_SMCCC_SMC_64 1 | |
| 32 | #define ARM_SMCCC_CALL_CONV_SHIFT 30 | |
| 33 | ||
| 34 | #define ARM_SMCCC_OWNER_MASK 0x3F | |
| 35 | #define ARM_SMCCC_OWNER_SHIFT 24 | |
| 36 | ||
| 37 | #define ARM_SMCCC_FUNC_MASK 0xFFFF | |
| 38 | ||
| 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) | |
| 46 | ||
| 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)) | |
| 52 | ||
| 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 | |
| 62 | ||
| 63 | /** | |
| 64 | * struct arm_smccc_res - Result from SMC/HVC call | |
| 65 | * @a0-a3 result values from registers 0 to 3 | |
| 66 | */ | |
| 67 | struct arm_smccc_res { | |
| 68 | unsigned long a0; | |
| 69 | unsigned long a1; | |
| 70 | unsigned long a2; | |
| 71 | unsigned long a3; | |
| 72 | }; | |
| 73 | ||
| 74 | /** | |
| 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 | |
| 78 | * | |
| 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. | |
| 83 | */ | |
| 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); | |
| 88 | ||
| 89 | /** | |
| 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 | |
| 93 | * | |
| 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. | |
| 98 | */ | |
| 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); | |
| 103 | ||
| 104 | #endif /*__LINUX_ARM_SMCCC_H*/ |