181 lines
5.2 KiB
C
181 lines
5.2 KiB
C
/****************************************************************************
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* arch/sim/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,
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* only indirectly through nuttx/irq.h
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*/
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#ifndef __ARCH_SIM_INCLUDE_IRQ_H
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#define __ARCH_SIM_INCLUDE_IRQ_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <arch/setjmp.h>
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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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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define NR_IRQS 64
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifndef __ASSEMBLY__
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/* This struct defines the way the registers are stored */
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struct xcptcontext
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{
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void *sigdeliver; /* Actual type is sig_deliver_t */
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jmp_buf regs;
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};
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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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/****************************************************************************
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* Public Data
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****************************************************************************/
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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
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* [get/set]_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 xcpt_reg_t *g_current_regs[CONFIG_SMP_NCPUS];
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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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/* Name: up_irq_save, up_irq_restore, and friends.
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*
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* NOTE: These functions should never be called from application code and,
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* as a general rule unless you really know what you are doing, this
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* function should not be called directly from operation system code either:
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* Typically, the wrapper functions, enter_critical_section() and
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* leave_critical section(), are probably what you really want.
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*/
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irqstate_t up_irq_flags(void);
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irqstate_t up_irq_save(void);
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void up_irq_restore(irqstate_t flags);
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void up_irq_enable(void);
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/****************************************************************************
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* Inline functions
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****************************************************************************/
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static inline_function xcpt_reg_t *up_current_regs(void)
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{
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return (xcpt_reg_t *)g_current_regs[up_cpu_index()];
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}
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static inline_function void up_set_current_regs(xcpt_reg_t *regs)
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{
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g_current_regs[up_cpu_index()] = regs;
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}
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/* Return the current value of the stack pointer */
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static inline uintptr_t up_getsp(void)
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{
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#ifdef _MSC_VER
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uintptr_t regval;
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__asm mov regval, esp;
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return regval;
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#else
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return (uintptr_t)__builtin_frame_address(0);
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#endif
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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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noinstrument_function
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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 = up_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_SIM_INCLUDE_IRQ_H */
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