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‎Document/CMSIS.html‎

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Redirect to the CMSIS main page after 0 seconds</title>
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<meta http-equiv="refresh" content="0; URL=../Library/CMSIS/Documentation/General/html/index.html">
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<meta name="keywords" content="automatic redirection">
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</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>
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</html>

‎Document/NuMicro M251_252 Series CMSIS BSP Driver Reference.chm‎

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‎Document/NuMicro M251_252 Series CMSIS BSP Revision History.pdf‎

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‎Library/CMSIS/Core/Template/ARMv8-M/main_s.c‎

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/*
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* Copyright (c) 2013-2016 ARM Limited. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an AS IS BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* ----------------------------------------------------------------------
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*
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* $Date: 15. October 2016
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* $Revision: 1.1.0
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*
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* Project: TrustZone for ARMv8-M
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* Title: Code template for secure main function
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*
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*---------------------------------------------------------------------------*/
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/* Use CMSE intrinsics */
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#include <arm_cmse.h>
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#include "RTE_Components.h"
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#include CMSIS_device_header
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/* TZ_START_NS: Start address of non-secure application */
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#ifndef TZ_START_NS
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#define TZ_START_NS (0x200000U)
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#endif
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/* typedef for non-secure callback functions */
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typedef void (*funcptr_void) (void) __attribute__((cmse_nonsecure_call));
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/* Secure main() */
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int main(void) {
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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) */
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__TZ_set_MSP_NS(*((uint32_t *)(TZ_START_NS)));
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/* Get non-secure reset handler */
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NonSecure_ResetHandler = (funcptr_void)(*((uint32_t *)((TZ_START_NS) + 4U)));
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/* Start non-secure state software application */
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NonSecure_ResetHandler();
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/* Non-secure software does not return, this code is not executed */
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while (1) {
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__NOP();
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}
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}

‎Library/CMSIS/Core/Template/ARMv8-M/tz_context.c‎

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/*
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* Copyright (c) 2015-2016 ARM Limited. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an AS IS BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* ----------------------------------------------------------------------------
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*
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* $Date: 15. October 2016
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* $Revision: 1.1.0
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*
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* Project: TrustZone for ARMv8-M
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* Title: Context Management for ARMv8-M TrustZone - Sample implementation
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*
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*---------------------------------------------------------------------------*/
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#include "RTE_Components.h"
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#include CMSIS_device_header
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#include "tz_context.h"
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/// Number of process slots (threads may call secure library code)
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#ifndef TZ_PROCESS_STACK_SLOTS
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#define TZ_PROCESS_STACK_SLOTS 8U
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#endif
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/// Stack size of the secure library code
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#ifndef TZ_PROCESS_STACK_SIZE
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#define TZ_PROCESS_STACK_SIZE 256U
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#endif
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typedef struct {
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uint32_t sp_top; // stack space top
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uint32_t sp_limit; // stack space limit
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uint32_t sp; // current stack pointer
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} stack_info_t;
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static stack_info_t ProcessStackInfo [TZ_PROCESS_STACK_SLOTS];
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static uint64_t ProcessStackMemory[TZ_PROCESS_STACK_SLOTS][TZ_PROCESS_STACK_SIZE/8U];
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static uint32_t ProcessStackFreeSlot = 0xFFFFFFFFU;
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/// Initialize secure context memory system
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/// \return execution status (1: success, 0: error)
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__attribute__((cmse_nonsecure_entry))
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uint32_t TZ_InitContextSystem_S (void) {
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uint32_t n;
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if (__get_IPSR() == 0U) {
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return 0U; // Thread Mode
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}
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for (n = 0U; n < TZ_PROCESS_STACK_SLOTS; n++) {
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ProcessStackInfo[n].sp = 0U;
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ProcessStackInfo[n].sp_limit = (uint32_t)&ProcessStackMemory[n];
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ProcessStackInfo[n].sp_top = (uint32_t)&ProcessStackMemory[n] + TZ_PROCESS_STACK_SIZE;
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*((uint32_t *)ProcessStackMemory[n]) = n + 1U;
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}
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*((uint32_t *)ProcessStackMemory[--n]) = 0xFFFFFFFFU;
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ProcessStackFreeSlot = 0U;
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// Default process stack pointer and stack limit
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__set_PSPLIM((uint32_t)ProcessStackMemory);
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__set_PSP ((uint32_t)ProcessStackMemory);
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// Privileged Thread Mode using PSP
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__set_CONTROL(0x02U);
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return 1U; // Success
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}
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/// Allocate context memory for calling secure software modules in TrustZone
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/// \param[in] module identifies software modules called from non-secure mode
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/// \return value != 0 id TrustZone memory slot identifier
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/// \return value 0 no memory available or internal error
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__attribute__((cmse_nonsecure_entry))
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TZ_MemoryId_t TZ_AllocModuleContext_S (TZ_ModuleId_t module) {
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uint32_t slot;
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(void)module; // Ignore (fixed Stack size)
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if (__get_IPSR() == 0U) {
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return 0U; // Thread Mode
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}
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if (ProcessStackFreeSlot == 0xFFFFFFFFU) {
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return 0U; // No slot available
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}
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slot = ProcessStackFreeSlot;
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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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}
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/// Free context memory that was previously allocated with \ref TZ_AllocModuleContext_S
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/// \param[in] id TrustZone memory slot identifier
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/// \return execution status (1: success, 0: error)
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__attribute__((cmse_nonsecure_entry))
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uint32_t TZ_FreeModuleContext_S (TZ_MemoryId_t id) {
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uint32_t slot;
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if (__get_IPSR() == 0U) {
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return 0U; // Thread Mode
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}
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if ((id == 0U) || (id > TZ_PROCESS_STACK_SLOTS)) {
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return 0U; // Invalid ID
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}
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slot = id - 1U;
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if (ProcessStackInfo[slot].sp == 0U) {
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return 0U; // Inactive slot
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}
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ProcessStackInfo[slot].sp = 0U;
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*((uint32_t *)ProcessStackMemory[slot]) = ProcessStackFreeSlot;
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ProcessStackFreeSlot = slot;
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return 1U; // Success
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}
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/// Load secure context (called on RTOS thread context switch)
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/// \param[in] id TrustZone memory slot identifier
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/// \return execution status (1: success, 0: error)
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__attribute__((cmse_nonsecure_entry))
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uint32_t TZ_LoadContext_S (TZ_MemoryId_t id) {
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uint32_t slot;
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if ((__get_IPSR() == 0U) || ((__get_CONTROL() & 2U) == 0U)) {
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return 0U; // Thread Mode or using Main Stack for threads
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}
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if ((id == 0U) || (id > TZ_PROCESS_STACK_SLOTS)) {
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return 0U; // Invalid ID
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}
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slot = id - 1U;
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if (ProcessStackInfo[slot].sp == 0U) {
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return 0U; // Inactive slot
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}
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// Setup process stack pointer and stack limit
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__set_PSPLIM(ProcessStackInfo[slot].sp_limit);
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__set_PSP (ProcessStackInfo[slot].sp);
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return 1U; // Success
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}
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/// Store secure context (called on RTOS thread context switch)
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/// \param[in] id TrustZone memory slot identifier
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/// \return execution status (1: success, 0: error)
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__attribute__((cmse_nonsecure_entry))
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uint32_t TZ_StoreContext_S (TZ_MemoryId_t id) {
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uint32_t slot;
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uint32_t sp;
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if ((__get_IPSR() == 0U) || ((__get_CONTROL() & 2U) == 0U)) {
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return 0U; // Thread Mode or using Main Stack for threads
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}
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if ((id == 0U) || (id > TZ_PROCESS_STACK_SLOTS)) {
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return 0U; // Invalid ID
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}
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slot = id - 1U;
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if (ProcessStackInfo[slot].sp == 0U) {
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return 0U; // Inactive slot
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}
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sp = __get_PSP();
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if ((sp < ProcessStackInfo[slot].sp_limit) ||
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(sp > ProcessStackInfo[slot].sp_top)) {
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return 0U; // SP out of range
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}
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ProcessStackInfo[slot].sp = sp;
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// Default process stack pointer and stack limit
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__set_PSPLIM((uint32_t)ProcessStackMemory);
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__set_PSP ((uint32_t)ProcessStackMemory);
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return 1U; // Success
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}

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