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hal/source/mbed_critical_section_api.c
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Unify the __CORTEX_A macro in the files containing cmsis.h
23 июн 2021, 08:36
23 июн 2021, 08:36
6feca90
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/* mbed Microcontroller Library * Copyright (c) 2017 ARM Limited * 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 "cmsis.h" #include "hal/critical_section_api.h" #include "platform/mbed_assert.h" #include "platform/mbed_toolchain.h" #include <stdbool.h> static bool critical_interrupts_enabled = false; static bool state_saved = false; static bool are_interrupts_enabled(void) { #if defined(__CORTEX_A) return ((__get_CPSR() & 0x80) == 0); #else return ((__get_PRIMASK() & 0x1) == 0); #endif } MBED_WEAK void hal_critical_section_enter(void) { const bool interrupt_state = are_interrupts_enabled(); __disable_irq(); if (state_saved == true) { return; } critical_interrupts_enabled = interrupt_state; state_saved = true; } MBED_WEAK void hal_critical_section_exit(void) { // Interrupts must be disabled on invoking an exit from a critical section MBED_ASSERT(!are_interrupts_enabled()); state_saved = false; // Restore the IRQs to their state prior to entering the critical section if (critical_interrupts_enabled == true) { __enable_irq(); } } MBED_WEAK bool hal_in_critical_section(void) { return (state_saved == true); }