151 lines
4.2 KiB
C
151 lines
4.2 KiB
C
/****************************************************************************
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* arch/or1k/include/irq.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* This file should never be included directly but, rather, only indirectly
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* through nuttx/irq.h
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*/
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#ifndef __ARCH_OR1K_INCLUDE_IRQ_H
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#define __ARCH_OR1K_INCLUDE_IRQ_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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#ifndef __ASSEMBLY__
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# include <stdbool.h>
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#endif
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/* Include NuttX-specific IRQ definitions */
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#include <nuttx/irq.h>
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/* Include chip-specific IRQ definitions (including IRQ numbers) */
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#include <arch/chip/irq.h>
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/****************************************************************************
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* Inline functions
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****************************************************************************/
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/* Return the current value of the stack pointer */
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static inline uint32_t up_getsp(void)
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{
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uint32_t sp;
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__asm__
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(
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"\tmov %0, sp\n\t"
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: "=r"(sp)
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);
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return sp;
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}
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/* g_current_regs[] holds a references to the current interrupt level
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* register storage structure. If is non-NULL only during interrupt
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* processing. Access to g_current_regs[] must be through the macro
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* CURRENT_REGS for portability.
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*/
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/* For the case of architectures with multiple CPUs, then there must be one
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* such value for each processor that can receive an interrupt.
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*/
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EXTERN volatile uint32_t *g_current_regs[CONFIG_SMP_NCPUS];
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#define CURRENT_REGS (g_current_regs[up_cpu_index()])
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: up_cpu_index
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*
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* Description:
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* Return an index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
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* corresponds to the currently executing CPU.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* An integer index in the range of 0 through (CONFIG_SMP_NCPUS-1) that
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* corresponds to the currently executing CPU.
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*
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****************************************************************************/
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#ifdef CONFIG_SMP
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int up_cpu_index(void);
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#else
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# define up_cpu_index() (0)
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#endif
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/****************************************************************************
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* Inline functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_interrupt_context
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*
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* Description:
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* Return true is we are currently executing in the interrupt
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* handler context.
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*
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****************************************************************************/
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static inline bool up_interrupt_context(void)
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{
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#ifdef CONFIG_SMP
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irqstate_t flags = up_irq_save();
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#endif
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bool ret = CURRENT_REGS != NULL;
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#ifdef CONFIG_SMP
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up_irq_restore(flags);
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#endif
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return ret;
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}
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_OR1K_INCLUDE_IRQ_H */
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