151 lines
4.2 KiB
C
151 lines
4.2 KiB
C
/****************************************************************************
|
|
* arch/or1k/include/irq.h
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/* This file should never be included directly but, rather, only indirectly
|
|
* through nuttx/irq.h
|
|
*/
|
|
|
|
#ifndef __ARCH_OR1K_INCLUDE_IRQ_H
|
|
#define __ARCH_OR1K_INCLUDE_IRQ_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <sys/types.h>
|
|
#ifndef __ASSEMBLY__
|
|
# include <stdbool.h>
|
|
#endif
|
|
|
|
/* Include NuttX-specific IRQ definitions */
|
|
|
|
#include <nuttx/irq.h>
|
|
|
|
/* Include chip-specific IRQ definitions (including IRQ numbers) */
|
|
|
|
#include <arch/chip/irq.h>
|
|
|
|
/****************************************************************************
|
|
* Inline functions
|
|
****************************************************************************/
|
|
|
|
/* Return the current value of the stack pointer */
|
|
|
|
static inline uint32_t up_getsp(void)
|
|
{
|
|
uint32_t sp;
|
|
|
|
__asm__
|
|
(
|
|
"\tmov %0, sp\n\t"
|
|
: "=r"(sp)
|
|
);
|
|
|
|
return sp;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#ifdef __cplusplus
|
|
#define EXTERN extern "C"
|
|
extern "C"
|
|
{
|
|
#else
|
|
#define EXTERN extern
|
|
#endif
|
|
|
|
/* g_current_regs[] holds a references to the current interrupt level
|
|
* register storage structure. It is non-NULL only during interrupt
|
|
* processing. Access to g_current_regs[] must be through the macro
|
|
* CURRENT_REGS for portability.
|
|
*/
|
|
|
|
/* For the case of architectures with multiple CPUs, then there must be one
|
|
* such value for each processor that can receive an interrupt.
|
|
*/
|
|
|
|
EXTERN volatile uint32_t *g_current_regs[CONFIG_SMP_NCPUS];
|
|
#define CURRENT_REGS (g_current_regs[up_cpu_index()])
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: up_cpu_index
|
|
*
|
|
* Description:
|
|
* Return an index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
|
|
* corresponds to the currently executing CPU.
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* An integer index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
|
|
* corresponds to the currently executing CPU.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_SMP
|
|
int up_cpu_index(void);
|
|
#else
|
|
# define up_cpu_index() (0)
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Inline functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: up_interrupt_context
|
|
*
|
|
* Description:
|
|
* Return true is we are currently executing in the interrupt
|
|
* handler context.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline bool up_interrupt_context(void)
|
|
{
|
|
#ifdef CONFIG_SMP
|
|
irqstate_t flags = up_irq_save();
|
|
#endif
|
|
|
|
bool ret = CURRENT_REGS != NULL;
|
|
|
|
#ifdef CONFIG_SMP
|
|
up_irq_restore(flags);
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
#undef EXTERN
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* __ARCH_OR1K_INCLUDE_IRQ_H */
|