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authorPatrick Delaunay <patrick.delaunay@st.com>2019-02-12 11:44:40 +0100
committerPatrick Delaunay <patrick.delaunay@st.com>2019-04-12 16:09:13 +0200
commitd859c611397b90ea4a96d18dcdbfe4f6ce7c231c (patch)
tree5cda88d44b5d6217358bf767a1dd2c7f628fcafc /arch/arm/mach-stm32mp/include/mach
parentabf2678f0f0d796295f3bfbe422436292e0795f7 (diff)
stm32mp1: bsec: access with SMC for trusted boot
As BSEC is secure aware, all register access need to be done by TF-A for TRUSTED boot chain, when U-Boot is executed in normal world. Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Diffstat (limited to 'arch/arm/mach-stm32mp/include/mach')
-rw-r--r--arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h b/arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h
new file mode 100644
index 0000000000..8130546b27
--- /dev/null
+++ b/arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h
@@ -0,0 +1,64 @@
+/* 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__ */