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| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> | ||
| <html xmlns="http://www.w3.org/1999/xhtml"> | ||
| <head> | ||
| <title>Redirect to the CMSIS main page after 0 seconds</title> | ||
| <meta http-equiv="refresh" content="0; URL=../Library/CMSIS/Documentation/General/html/index.html"> | ||
| <meta name="keywords" content="automatic redirection"> | ||
| </head> | ||
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| <body> | ||
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| If the automatic redirection is failing, click <a href="../Library/CMSIS/Documentation/General/html/index.html">open CMSIS Documentation</a>. | ||
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| </body> | ||
| </html> |
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| /* | ||
| * Copyright (c) 2013-2016 ARM Limited. All rights reserved. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the License); you may | ||
| * not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an AS IS BASIS, WITHOUT | ||
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| * ---------------------------------------------------------------------- | ||
| * | ||
| * $Date: 15. October 2016 | ||
| * $Revision: 1.1.0 | ||
| * | ||
| * Project: TrustZone for ARMv8-M | ||
| * Title: Code template for secure main function | ||
| * | ||
| *---------------------------------------------------------------------------*/ | ||
|
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| /* Use CMSE intrinsics */ | ||
| #include <arm_cmse.h> | ||
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| #include "RTE_Components.h" | ||
| #include CMSIS_device_header | ||
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| /* TZ_START_NS: Start address of non-secure application */ | ||
| #ifndef TZ_START_NS | ||
| #define TZ_START_NS (0x200000U) | ||
| #endif | ||
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| /* typedef for non-secure callback functions */ | ||
| typedef void (*funcptr_void) (void) __attribute__((cmse_nonsecure_call)); | ||
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| /* Secure main() */ | ||
| int main(void) { | ||
| funcptr_void NonSecure_ResetHandler; | ||
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| /* Add user setup code for secure part here*/ | ||
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| /* Set non-secure main stack (MSP_NS) */ | ||
| __TZ_set_MSP_NS(*((uint32_t *)(TZ_START_NS))); | ||
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| /* Get non-secure reset handler */ | ||
| NonSecure_ResetHandler = (funcptr_void)(*((uint32_t *)((TZ_START_NS) + 4U))); | ||
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| /* Start non-secure state software application */ | ||
| NonSecure_ResetHandler(); | ||
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| /* Non-secure software does not return, this code is not executed */ | ||
| while (1) { | ||
| __NOP(); | ||
| } | ||
| } |
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| /* | ||
| * Copyright (c) 2015-2016 ARM Limited. All rights reserved. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the License); you may | ||
| * not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an AS IS BASIS, WITHOUT | ||
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| * ---------------------------------------------------------------------------- | ||
| * | ||
| * $Date: 15. October 2016 | ||
| * $Revision: 1.1.0 | ||
| * | ||
| * Project: TrustZone for ARMv8-M | ||
| * Title: Context Management for ARMv8-M TrustZone - Sample implementation | ||
| * | ||
| *---------------------------------------------------------------------------*/ | ||
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| #include "RTE_Components.h" | ||
| #include CMSIS_device_header | ||
| #include "tz_context.h" | ||
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| /// Number of process slots (threads may call secure library code) | ||
| #ifndef TZ_PROCESS_STACK_SLOTS | ||
| #define TZ_PROCESS_STACK_SLOTS 8U | ||
| #endif | ||
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| /// Stack size of the secure library code | ||
| #ifndef TZ_PROCESS_STACK_SIZE | ||
| #define TZ_PROCESS_STACK_SIZE 256U | ||
| #endif | ||
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| typedef struct { | ||
| uint32_t sp_top; // stack space top | ||
| uint32_t sp_limit; // stack space limit | ||
| uint32_t sp; // current stack pointer | ||
| } stack_info_t; | ||
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| static stack_info_t ProcessStackInfo [TZ_PROCESS_STACK_SLOTS]; | ||
| static uint64_t ProcessStackMemory[TZ_PROCESS_STACK_SLOTS][TZ_PROCESS_STACK_SIZE/8U]; | ||
| static uint32_t ProcessStackFreeSlot = 0xFFFFFFFFU; | ||
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| /// Initialize secure context memory system | ||
| /// \return execution status (1: success, 0: error) | ||
| __attribute__((cmse_nonsecure_entry)) | ||
| uint32_t TZ_InitContextSystem_S (void) { | ||
| uint32_t n; | ||
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| if (__get_IPSR() == 0U) { | ||
| return 0U; // Thread Mode | ||
| } | ||
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| for (n = 0U; n < TZ_PROCESS_STACK_SLOTS; n++) { | ||
| ProcessStackInfo[n].sp = 0U; | ||
| ProcessStackInfo[n].sp_limit = (uint32_t)&ProcessStackMemory[n]; | ||
| ProcessStackInfo[n].sp_top = (uint32_t)&ProcessStackMemory[n] + TZ_PROCESS_STACK_SIZE; | ||
| *((uint32_t *)ProcessStackMemory[n]) = n + 1U; | ||
| } | ||
| *((uint32_t *)ProcessStackMemory[--n]) = 0xFFFFFFFFU; | ||
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| ProcessStackFreeSlot = 0U; | ||
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| // Default process stack pointer and stack limit | ||
| __set_PSPLIM((uint32_t)ProcessStackMemory); | ||
| __set_PSP ((uint32_t)ProcessStackMemory); | ||
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| // Privileged Thread Mode using PSP | ||
| __set_CONTROL(0x02U); | ||
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| return 1U; // Success | ||
| } | ||
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| /// Allocate context memory for calling secure software modules in TrustZone | ||
| /// \param[in] module identifies software modules called from non-secure mode | ||
| /// \return value != 0 id TrustZone memory slot identifier | ||
| /// \return value 0 no memory available or internal error | ||
| __attribute__((cmse_nonsecure_entry)) | ||
| TZ_MemoryId_t TZ_AllocModuleContext_S (TZ_ModuleId_t module) { | ||
| uint32_t slot; | ||
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| (void)module; // Ignore (fixed Stack size) | ||
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| if (__get_IPSR() == 0U) { | ||
| return 0U; // Thread Mode | ||
| } | ||
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| if (ProcessStackFreeSlot == 0xFFFFFFFFU) { | ||
| return 0U; // No slot available | ||
| } | ||
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| slot = ProcessStackFreeSlot; | ||
| ProcessStackFreeSlot = *((uint32_t *)ProcessStackMemory[slot]); | ||
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| ProcessStackInfo[slot].sp = ProcessStackInfo[slot].sp_top; | ||
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| return (slot + 1U); | ||
| } | ||
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| /// Free context memory that was previously allocated with \ref TZ_AllocModuleContext_S | ||
| /// \param[in] id TrustZone memory slot identifier | ||
| /// \return execution status (1: success, 0: error) | ||
| __attribute__((cmse_nonsecure_entry)) | ||
| uint32_t TZ_FreeModuleContext_S (TZ_MemoryId_t id) { | ||
| uint32_t slot; | ||
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| if (__get_IPSR() == 0U) { | ||
| return 0U; // Thread Mode | ||
| } | ||
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| if ((id == 0U) || (id > TZ_PROCESS_STACK_SLOTS)) { | ||
| return 0U; // Invalid ID | ||
| } | ||
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| slot = id - 1U; | ||
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| if (ProcessStackInfo[slot].sp == 0U) { | ||
| return 0U; // Inactive slot | ||
| } | ||
| ProcessStackInfo[slot].sp = 0U; | ||
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| *((uint32_t *)ProcessStackMemory[slot]) = ProcessStackFreeSlot; | ||
| ProcessStackFreeSlot = slot; | ||
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| return 1U; // Success | ||
| } | ||
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| /// Load secure context (called on RTOS thread context switch) | ||
| /// \param[in] id TrustZone memory slot identifier | ||
| /// \return execution status (1: success, 0: error) | ||
| __attribute__((cmse_nonsecure_entry)) | ||
| uint32_t TZ_LoadContext_S (TZ_MemoryId_t id) { | ||
| uint32_t slot; | ||
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| if ((__get_IPSR() == 0U) || ((__get_CONTROL() & 2U) == 0U)) { | ||
| return 0U; // Thread Mode or using Main Stack for threads | ||
| } | ||
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| if ((id == 0U) || (id > TZ_PROCESS_STACK_SLOTS)) { | ||
| return 0U; // Invalid ID | ||
| } | ||
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| slot = id - 1U; | ||
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| if (ProcessStackInfo[slot].sp == 0U) { | ||
| return 0U; // Inactive slot | ||
| } | ||
|
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| // Setup process stack pointer and stack limit | ||
| __set_PSPLIM(ProcessStackInfo[slot].sp_limit); | ||
| __set_PSP (ProcessStackInfo[slot].sp); | ||
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| return 1U; // Success | ||
| } | ||
|
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| /// Store secure context (called on RTOS thread context switch) | ||
| /// \param[in] id TrustZone memory slot identifier | ||
| /// \return execution status (1: success, 0: error) | ||
| __attribute__((cmse_nonsecure_entry)) | ||
| uint32_t TZ_StoreContext_S (TZ_MemoryId_t id) { | ||
| uint32_t slot; | ||
| uint32_t sp; | ||
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| if ((__get_IPSR() == 0U) || ((__get_CONTROL() & 2U) == 0U)) { | ||
| return 0U; // Thread Mode or using Main Stack for threads | ||
| } | ||
|
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| if ((id == 0U) || (id > TZ_PROCESS_STACK_SLOTS)) { | ||
| return 0U; // Invalid ID | ||
| } | ||
|
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| slot = id - 1U; | ||
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| if (ProcessStackInfo[slot].sp == 0U) { | ||
| return 0U; // Inactive slot | ||
| } | ||
|
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| sp = __get_PSP(); | ||
| if ((sp < ProcessStackInfo[slot].sp_limit) || | ||
| (sp > ProcessStackInfo[slot].sp_top)) { | ||
| return 0U; // SP out of range | ||
| } | ||
| ProcessStackInfo[slot].sp = sp; | ||
|
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| // Default process stack pointer and stack limit | ||
| __set_PSPLIM((uint32_t)ProcessStackMemory); | ||
| __set_PSP ((uint32_t)ProcessStackMemory); | ||
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| return 1U; // Success | ||
| } |
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