mirror of https://github.com/ARMmbed/mbed-os.git
64 lines
2.6 KiB
C
64 lines
2.6 KiB
C
/*
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* Copyright (c) 2013-2015, ARM Limited, All Rights Reserved
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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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* http://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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#ifndef __UVISOR_API_INTERRUPTS_H__
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#define __UVISOR_API_INTERRUPTS_H__
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#include "api/inc/uvisor_exports.h"
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#include <stdint.h>
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UVISOR_EXTERN void vIRQ_SetVector(uint32_t irqn, uint32_t vector);
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UVISOR_EXTERN uint32_t vIRQ_GetVector(uint32_t irqn);
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UVISOR_EXTERN void vIRQ_EnableIRQ(uint32_t irqn);
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UVISOR_EXTERN void vIRQ_DisableIRQ(uint32_t irqn);
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UVISOR_EXTERN void vIRQ_ClearPendingIRQ(uint32_t irqn);
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UVISOR_EXTERN void vIRQ_SetPendingIRQ(uint32_t irqn);
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UVISOR_EXTERN uint32_t vIRQ_GetPendingIRQ(uint32_t irqn);
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UVISOR_EXTERN void vIRQ_SetPriority(uint32_t irqn, uint32_t priority);
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UVISOR_EXTERN uint32_t vIRQ_GetPriority(uint32_t irqn);
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UVISOR_EXTERN int vIRQ_GetLevel(void);
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/** Disable all interrupts for the currently active box.
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*
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* Calling this function from a box only affects the interrupts of that box.
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* System interrupts and interrupts owned by other boxes are left untouched.
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*
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* Successive calls to this function increase an internal counter that is used
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* by uVisor to decide when to re-enable IRQs. The related call
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* ::vIRQ_EnableIRQ() decreases this counter. Only when the counter is 0 the
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* interrupts are re-enabled for that box.
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*
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* This guarantees that code that disables IRQs will not accidentally have them
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* re-enabled by a nested function that it calls before the expected call to
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* ::vIRQ_EnableAll(). Example:
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*
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* vIRQ_DisableAll(); counter = 1; IRQs are now disabled.
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* some_function(); counter = 2, then counter = 1; IRQs are still disabled.
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* vIRQ_EnableAll(); counter = 0; IRQs are now re-enabled.
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*
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* where some_function() also has a disable/enable pair. */
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UVISOR_EXTERN void vIRQ_DisableAll(void);
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/** Re-enable all interrupts that were previously disabled for the currently
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* active box.
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*
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* This function only re-enables interrupt if the uVisor internal counter is set
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* to 0, to make sure that nested disabling of IRQs is still effective. See
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* ::vIRQ_DisableAll for more information. */
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UVISOR_EXTERN void vIRQ_EnableAll(void);
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#endif /* __UVISOR_API_INTERRUPTS_H__ */
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