arm_hal_interrupt.c

00001 // ----------------------------------------------------------------------------
00002 // Copyright 2016-2017 ARM Ltd.
00003 //
00004 // SPDX-License-Identifier: Apache-2.0
00005 //
00006 // Licensed under the Apache License, Version 2.0 (the "License");
00007 // you may not use this file except in compliance with the License.
00008 // You may obtain a copy of the License at
00009 //
00010 //     http://www.apache.org/licenses/LICENSE-2.0
00011 //
00012 // Unless required by applicable law or agreed to in writing, software
00013 // distributed under the License is distributed on an "AS IS" BASIS,
00014 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00015 // See the License for the specific language governing permissions and
00016 // limitations under the License.
00017 // ----------------------------------------------------------------------------
00018 
00019 #include "platform/arm_hal_interrupt.h"
00020 
00021 #include "arm_hal_interrupt_private.h"
00022 #include "pal.h"
00023 
00024 #include <assert.h>
00025 
00026 
00027 static uint8_t sys_irq_disable_counter;
00028 
00029 static palMutexID_t critical_mutex_id;
00030 
00031 void platform_critical_init(void)
00032 {
00033     palStatus_t status;
00034     status = pal_osMutexCreate(&critical_mutex_id);
00035     assert(PAL_SUCCESS == status);
00036 }
00037 
00038 void platform_enter_critical(void)
00039 {
00040     palStatus_t status;
00041     status = pal_osMutexWait(critical_mutex_id, UINT32_MAX);
00042     assert(PAL_SUCCESS == status);
00043     sys_irq_disable_counter++;
00044 }
00045 
00046 void platform_exit_critical(void)
00047 {
00048     palStatus_t status;
00049     --sys_irq_disable_counter;
00050     status = pal_osMutexRelease(critical_mutex_id);
00051     assert(PAL_SUCCESS == status);
00052 }