blob: 2696225116a23e3deedc598dd1e7a394166cdf86 [file] [log] [blame]
/*
* Copyright (c) 2013-2014 Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief Cortex-M public interrupt handling
*
* ARM-specific kernel interrupt handling interface. Included by arm/arch.h.
*/
#ifndef _ARCH_ARM_CORTEXM_IRQ_H_
#define _ARCH_ARM_CORTEXM_IRQ_H_
#include <irq.h>
#include <sw_isr_table.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _ASMLANGUAGE
GTEXT(_IntExit);
GTEXT(_arch_irq_enable)
GTEXT(_arch_irq_disable)
GTEXT(_arch_irq_is_enabled)
#else
extern void _arch_irq_enable(unsigned int irq);
extern void _arch_irq_disable(unsigned int irq);
extern int _arch_irq_is_enabled(unsigned int irq);
extern void _IntExit(void);
/* macros convert value of it's argument to a string */
#define DO_TOSTR(s) #s
#define TOSTR(s) DO_TOSTR(s)
/* concatenate the values of the arguments into one */
#define DO_CONCAT(x, y) x ## y
#define CONCAT(x, y) DO_CONCAT(x, y)
/* internal routine documented in C file, needed by IRQ_CONNECT() macro */
extern void _irq_priority_set(unsigned int irq, unsigned int prio,
u32_t flags);
/* Flags for use with IRQ_CONNECT() */
#if CONFIG_ZERO_LATENCY_IRQS
/**
* Set this interrupt up as a zero-latency IRQ. It has a fixed hardware
* priority level (discarding what was supplied in the interrupt's priority
* argument), and will run even if irq_lock() is active. Be careful!
*/
#define IRQ_ZERO_LATENCY (1 << 0)
#endif
/**
* Configure a static interrupt.
*
* All arguments must be computable by the compiler at build time.
*
* _ISR_DECLARE will populate the .intList section with the interrupt's
* parameters, which will then be used by gen_irq_tables.py to create
* the vector table and the software ISR table. This is all done at
* build-time.
*
* We additionally set the priority in the interrupt controller at
* runtime.
*
* @param irq_p IRQ line number
* @param priority_p Interrupt priority
* @param isr_p Interrupt service routine
* @param isr_param_p ISR parameter
* @param flags_p IRQ options
*
* @return The vector assigned to this interrupt
*/
#define _ARCH_IRQ_CONNECT(irq_p, priority_p, isr_p, isr_param_p, flags_p) \
({ \
_ISR_DECLARE(irq_p, 0, isr_p, isr_param_p); \
_irq_priority_set(irq_p, priority_p, flags_p); \
irq_p; \
})
/**
* Configure a 'direct' static interrupt.
*
* See include/irq.h for details.
* All arguments must be computable at build time.
*/
#define _ARCH_IRQ_DIRECT_CONNECT(irq_p, priority_p, isr_p, flags_p) \
({ \
_ISR_DECLARE(irq_p, ISR_FLAG_DIRECT, isr_p, NULL); \
_irq_priority_set(irq_p, priority_p, flags_p); \
irq_p; \
})
/* FIXME prefer these inline, but see ZEP-1595 */
#ifdef CONFIG_SYS_POWER_MANAGEMENT
extern void _arch_isr_direct_pm(void);
#define _ARCH_ISR_DIRECT_PM() _arch_isr_direct_pm()
#else
#define _ARCH_ISR_DIRECT_PM() do { } while (0)
#endif
#if defined(CONFIG_KERNEL_EVENT_LOGGER_SLEEP) || \
defined(CONFIG_KERNEL_EVENT_LOGGER_INTERRUPT)
#define _ARCH_ISR_DIRECT_HEADER() _arch_isr_direct_header()
extern void _arch_isr_direct_header(void);
#else
#define _ARCH_ISR_DIRECT_HEADER() do { } while (0)
#endif
#define _ARCH_ISR_DIRECT_FOOTER(swap) _arch_isr_direct_footer(swap)
/* arch/arm/core/exc_exit.S */
extern void _IntExit(void);
static inline void _arch_isr_direct_footer(int maybe_swap)
{
if (maybe_swap) {
_IntExit();
}
}
#define _ARCH_ISR_DIRECT_DECLARE(name) \
static inline int name##_body(void); \
__attribute__ ((interrupt ("IRQ"))) void name(void) \
{ \
int check_reschedule; \
ISR_DIRECT_HEADER(); \
check_reschedule = name##_body(); \
ISR_DIRECT_FOOTER(check_reschedule); \
} \
static inline int name##_body(void)
/* Spurious interrupt handler. Throws an error if called */
extern void _irq_spurious(void *unused);
#ifdef CONFIG_GEN_SW_ISR_TABLE
/* Architecture-specific common entry point for interrupts from the vector
* table. Most likely implemented in assembly. Looks up the correct handler
* and parameter from the _sw_isr_table and executes it.
*/
extern void _isr_wrapper(void);
#endif
#endif /* _ASMLANGUAGE */
#ifdef __cplusplus
}
#endif
#endif /* _ARCH_ARM_CORTEXM_IRQ_H_ */