nuttx/arch/sim/include/irq.h

137 lines
4.4 KiB
C

/****************************************************************************
* irq.h
*
* Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/* This file should never be included directed but, rather,
* only indirectly through nuttx/irq.h
*/
#ifndef __ARCH_IRQ_H
#define __ARCH_IRQ_H
/****************************************************************************
* Included Files
****************************************************************************/
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* No interrupts */
#define NR_IRQS 0
/* Number of registers saved in context switch */
#if defined(CONFIG_HOST_X86_64) && !defined(CONFIG_SIM_M32)
/* Storage order: %rbx, %rsp, %rbp, %r12, %r13, %r14, %r15, %rip */
# define XCPTCONTEXT_REGS 8
#else
/* Storage order: %ebx, %esi, %edi, %ebp, sp, and return PC */
# define XCPTCONTEXT_REGS 6
#endif
/****************************************************************************
* Public Types
****************************************************************************/
#ifndef __ASSEMBLY__
/* Number of registers saved in context switch */
#if defined(CONFIG_HOST_X86_64) && !defined(CONFIG_SIM_M32)
typedef unsigned long xcpt_reg_t;
#else
typedef int xcpt_reg_t;
#endif
/* This struct defines the way the registers are stored */
struct xcptcontext
{
void *sigdeliver; /* Actual type is sig_deliver_t */
xcpt_reg_t regs[XCPTCONTEXT_REGS];
};
#endif
/****************************************************************************
* Inline functions
****************************************************************************/
#ifndef __ASSEMBLY__
/* Name: up_irq_save, up_irq_restore, and friends.
*
* NOTE: This function should never be called from application code and,
* as a general rule unless you really know what you are doing, this
* function should not be called directly from operation system code either:
* Typically, the wrapper functions, enter_critical_section() and
* leave_critical section(), are probably what you really want.
*/
static inline irqstate_t up_irq_save(void)
{
return 0;
}
static inline void up_irq_restore(irqstate_t flags)
{
}
#endif
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __ARCH_IRQ_H */