| /* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause */ |
| /* |
| * Copyright (C) 2019, STMicroelectronics - All Rights Reserved |
| */ |
| |
| #ifndef __STM32MP1_SMC_H__ |
| #define __STM32MP1_SMC_H__ |
| |
| #include <linux/arm-smccc.h> |
| |
| /* |
| * SMC function IDs for STM32 Service queries |
| * STM32 SMC services use the space between 0x82000000 and 0x8200FFFF |
| * like this is defined in SMC calling Convention by ARM |
| * for SiP (silicon Partner) |
| * http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html |
| */ |
| #define STM32_SMC_VERSION 0x82000000 |
| |
| /* Secure Service access from Non-secure */ |
| #define STM32_SMC_BSEC 0x82001003 |
| |
| /* Service for BSEC */ |
| #define STM32_SMC_READ_SHADOW 0x01 |
| #define STM32_SMC_PROG_OTP 0x02 |
| #define STM32_SMC_WRITE_SHADOW 0x03 |
| #define STM32_SMC_READ_OTP 0x04 |
| #define STM32_SMC_READ_ALL 0x05 |
| #define STM32_SMC_WRITE_ALL 0x06 |
| |
| /* SMC error codes */ |
| #define STM32_SMC_OK 0x0 |
| #define STM32_SMC_NOT_SUPPORTED -1 |
| #define STM32_SMC_FAILED -2 |
| #define STM32_SMC_INVALID_PARAMS -3 |
| |
| #define stm32_smc_exec(svc, op, data1, data2) \ |
| stm32_smc(svc, op, data1, data2, NULL) |
| |
| #ifdef CONFIG_ARM_SMCCC |
| static inline u32 stm32_smc(u32 svc, u8 op, u32 data1, u32 data2, u32 *result) |
| { |
| struct arm_smccc_res res; |
| |
| arm_smccc_smc(svc, op, data1, data2, 0, 0, 0, 0, &res); |
| |
| if (res.a0) { |
| pr_err("%s: Failed to exec in secure mode (err = %ld)\n", |
| __func__, res.a0); |
| return -EINVAL; |
| } |
| if (result) |
| *result = (u32)res.a1; |
| |
| return 0; |
| } |
| #else |
| static inline u32 stm32_smc(u32 svc, u8 op, u32 data1, u32 data2, u32 *result) |
| { |
| return 0; |
| } |
| #endif |
| |
| #endif /* __STM32MP1_SMC_H__ */ |
