mbed-os/features/FEATURE_UVISOR/source/rtx/box_init.c

57 lines
2.1 KiB
C

/*
* Copyright (c) 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
*
* http://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.
*/
#include "uvisor-lib/uvisor-lib.h"
#include "mbed_interface.h"
#include "cmsis_os.h"
#include <stdint.h>
#include <string.h>
/* This function is called by uVisor in unprivileged mode. On this OS, we
* create box main threads for the box. */
void __uvisor_lib_box_init(void * lib_config)
{
osThreadId thread_id;
osThreadDef_t * flash_thread_def = lib_config;
osThreadDef_t thread_def;
/* Copy thread definition from flash to RAM. The thread definition is most
* likely in flash, so we need to copy it to box-local RAM before we can
* modify it. */
memcpy(&thread_def, flash_thread_def, sizeof(thread_def));
/* Note that the box main thread stack is separate from the box stack. This
* is because the thread must be created to use a different stack than the
* stack osCreateThread() is called from, as context information is saved
* to the thread stack by the call to osCreateThread(). */
/* Allocate memory for the main thread from the process heap (which is
* private to the process). This memory is never freed, even if the box's
* main thread exits. */
thread_def.stack_pointer = malloc_p(thread_def.stacksize);
if (thread_def.stack_pointer == NULL) {
/* No process heap memory available */
mbed_die();
}
thread_id = osThreadCreate(&thread_def, NULL);
if (thread_id == NULL) {
/* Failed to create thread */
mbed_die();
}
}