74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause */
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/*
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* Copyright (C) 2019, STMicroelectronics - All Rights Reserved
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*/
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#ifndef __STM32MP1_SMC_H__
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#define __STM32MP1_SMC_H__
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#include <linux/arm-smccc.h>
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/*
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* SMC function IDs for STM32 Service queries
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* STM32 SMC services use the space between 0x82000000 and 0x8200FFFF
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* like this is defined in SMC calling Convention by ARM
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* for SiP (silicon Partner)
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* http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
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*/
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#define STM32_SMC_VERSION 0x82000000
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/* Secure Service access from Non-secure */
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#define STM32_SMC_RCC 0x82001000
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#define STM32_SMC_PWR 0x82001001
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#define STM32_SMC_RTC 0x82001002
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#define STM32_SMC_BSEC 0x82001003
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/* Register access service use for RCC/RTC/PWR */
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#define STM32_SMC_REG_WRITE 0x1
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#define STM32_SMC_REG_SET 0x2
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#define STM32_SMC_REG_CLEAR 0x3
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/* Service for BSEC */
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#define STM32_SMC_READ_SHADOW 0x01
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#define STM32_SMC_PROG_OTP 0x02
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#define STM32_SMC_WRITE_SHADOW 0x03
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#define STM32_SMC_READ_OTP 0x04
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#define STM32_SMC_READ_ALL 0x05
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#define STM32_SMC_WRITE_ALL 0x06
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#define STM32_SMC_WRLOCK_OTP 0x07
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/* SMC error codes */
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#define STM32_SMC_OK 0x0
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#define STM32_SMC_NOT_SUPPORTED -1
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#define STM32_SMC_FAILED -2
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#define STM32_SMC_INVALID_PARAMS -3
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#define stm32_smc_exec(svc, op, data1, data2) \
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stm32_smc(svc, op, data1, data2, NULL)
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#ifdef CONFIG_ARM_SMCCC
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static inline u32 stm32_smc(u32 svc, u8 op, u32 data1, u32 data2, u32 *result)
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{
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struct arm_smccc_res res;
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arm_smccc_smc(svc, op, data1, data2, 0, 0, 0, 0, &res);
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if (res.a0) {
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pr_err("%s: Failed to exec svc=%x op=%x in secure mode (err = %ld)\n",
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__func__, svc, op, res.a0);
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return -EINVAL;
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}
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if (result)
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*result = (u32)res.a1;
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return 0;
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}
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#else
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static inline u32 stm32_smc(u32 svc, u8 op, u32 data1, u32 data2, u32 *result)
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{
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return 0;
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}
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#endif
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#endif /* __STM32MP1_SMC_H__ */
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