137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
/*
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* Copyright (c) 2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief ARCv2 public interrupt handling
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*
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* ARCv2 kernel interrupt handling interface. Included by arc/arch.h.
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*/
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#ifndef ZEPHYR_INCLUDE_ARCH_ARC_V2_IRQ_H_
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#define ZEPHYR_INCLUDE_ARCH_ARC_V2_IRQ_H_
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#include <arch/arc/v2/aux_regs.h>
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#include <toolchain/common.h>
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#include <irq.h>
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#include <misc/util.h>
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#include <sw_isr_table.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef _ASMLANGUAGE
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GTEXT(_irq_exit);
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GTEXT(_arch_irq_enable)
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GTEXT(_arch_irq_disable)
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#else
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extern void _arch_irq_enable(unsigned int irq);
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extern void _arch_irq_disable(unsigned int irq);
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extern void _irq_exit(void);
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extern void _irq_priority_set(unsigned int irq, unsigned int prio,
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u32_t flags);
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extern void _isr_wrapper(void);
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extern void _irq_spurious(void *unused);
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/**
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* Configure a static interrupt.
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*
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* All arguments must be computable by the compiler at build time.
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*
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* _ISR_DECLARE will populate the .intList section with the interrupt's
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* parameters, which will then be used by gen_irq_tables.py to create
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* the vector table and the software ISR table. This is all done at
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* build-time.
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*
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* We additionally set the priority in the interrupt controller at
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* runtime.
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*
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* @param irq_p IRQ line number
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* @param priority_p Interrupt priority
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* @param isr_p Interrupt service routine
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* @param isr_param_p ISR parameter
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* @param flags_p IRQ options
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*
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* @return The vector assigned to this interrupt
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*/
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#define _ARCH_IRQ_CONNECT(irq_p, priority_p, isr_p, isr_param_p, flags_p) \
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({ \
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_ISR_DECLARE(irq_p, 0, isr_p, isr_param_p); \
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_irq_priority_set(irq_p, priority_p, flags_p); \
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irq_p; \
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})
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/**
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*
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* @brief Disable all interrupts on the local CPU
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*
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* This routine disables interrupts. It can be called from either interrupt or
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* thread level. This routine returns an architecture-dependent
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* lock-out key representing the "interrupt disable state" prior to the call;
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* this key can be passed to irq_unlock() to re-enable interrupts.
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*
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* The lock-out key should only be used as the argument to the
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* irq_unlock() API. It should never be used to manually re-enable
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* interrupts or to inspect or manipulate the contents of the source register.
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*
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* This function can be called recursively: it will return a key to return the
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* state of interrupt locking to the previous level.
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*
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* WARNINGS
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* Invoking a kernel routine with interrupts locked may result in
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* interrupts being re-enabled for an unspecified period of time. If the
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* called routine blocks, interrupts will be re-enabled while another
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* thread executes, or while the system is idle.
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*
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* The "interrupt disable state" is an attribute of a thread. Thus, if a
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* thread disables interrupts and subsequently invokes a kernel
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* routine that causes the calling thread to block, the interrupt
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* disable state will be restored when the thread is later rescheduled
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* for execution.
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*
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* @return An architecture-dependent lock-out key representing the
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* "interrupt disable state" prior to the call.
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*/
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static ALWAYS_INLINE unsigned int _arch_irq_lock(void)
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{
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unsigned int key;
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__asm__ volatile("clri %0" : "=r"(key):: "memory");
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return key;
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}
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/**
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*
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* @brief Enable all interrupts on the local CPU
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*
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* This routine re-enables interrupts on the local CPU. The @a key parameter
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* is an architecture-dependent lock-out key that is returned by a previous
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* invocation of irq_lock().
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*
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* This routine can be called from either interrupt or thread level.
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*
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* @return N/A
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*/
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static ALWAYS_INLINE void _arch_irq_unlock(unsigned int key)
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{
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__asm__ volatile("seti %0" : : "ir"(key) : "memory");
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}
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#endif /* _ASMLANGUAGE */
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZEPHYR_INCLUDE_ARCH_ARC_V2_IRQ_H_ */
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