111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
/* arcv2_irq_unit.h - ARCv2 Interrupt Unit device driver */
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/*
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* Copyright (c) 2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may 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,
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* WITHOUT 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 _ARC_V2_IRQ_UNIT__H
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#define _ARC_V2_IRQ_UNIT__H
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/* configuration flags for interrupt unit */
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#define _ARC_V2_INT_DISABLE 0
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#define _ARC_V2_INT_ENABLE 1
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#define _ARC_V2_INT_LEVEL 0
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#define _ARC_V2_INT_PULSE 1
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#ifndef _ASMLANGUAGE
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/*
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* WARNING:
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*
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* All APIs provided by this file must be invoked with INTERRUPTS LOCKED. The
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* APIs themselves are writing the IRQ_SELECT, selecting which IRQ's registers
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* it wants to write to, then write to them: THIS IS NOT AN ATOMIC OPERATION.
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*
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* Not locking the interrupts inside of the APIs allows a caller to:
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*
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* - lock interrupts
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* - call many of these APIs
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* - unlock interrupts
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*
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* thus being more efficient then if the APIs themselves would lock
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* interrupts.
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*/
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/*
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* @brief Enable/disable interrupt
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*
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* Enables or disables the specified interrupt
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*
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* @return N/A
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*/
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static inline void _arc_v2_irq_unit_irq_enable_set(
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int irq,
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unsigned char enable
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)
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{
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_arc_v2_aux_reg_write(_ARC_V2_IRQ_SELECT, irq);
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_arc_v2_aux_reg_write(_ARC_V2_IRQ_ENABLE, enable);
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}
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/*
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* @brief Enable interrupt
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*
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* Enables the specified interrupt
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*
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* @return N/A
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*/
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static inline void _arc_v2_irq_unit_int_enable(int irq)
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{
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_arc_v2_irq_unit_irq_enable_set(irq, _ARC_V2_INT_ENABLE);
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}
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/*
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* @brief Disable interrupt
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*
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* Disables the specified interrupt
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*
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* @return N/A
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*/
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static inline void _arc_v2_irq_unit_int_disable(int irq)
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{
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_arc_v2_irq_unit_irq_enable_set(irq, _ARC_V2_INT_DISABLE);
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}
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/*
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* @brief Set interrupt priority
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*
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* Set the priority of the specified interrupt
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*
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* @return N/A
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*/
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static inline void _arc_v2_irq_unit_prio_set(int irq, unsigned char prio)
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{
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_arc_v2_aux_reg_write(_ARC_V2_IRQ_SELECT, irq);
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_arc_v2_aux_reg_write(_ARC_V2_IRQ_PRIORITY, prio);
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}
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void _arc_v2_irq_unit_int_eoi(int irq);
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void _arc_v2_irq_unit_init(void);
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#endif /* _ASMLANGUAGE */
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#endif /* _ARC_V2_IRQ_UNIT__H */
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