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/****************************************************************************
* arch/z8/irq.h
* arch/chip/irq.h
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 (via arch/irq.h)
*/
#ifndef __ARCH_Z8_IRQ_H
#define __ARCH_Z8_IRQ_H
/****************************************************************************
* Included Files
****************************************************************************/
/****************************************************************************
* Definitions
****************************************************************************/
/* Z80 Interrupts */
#define Z80_RST0 (0)
#define Z80_RST1 (1)
#define Z80_RST2 (2)
#define Z80_RST3 (3)
#define Z80_RST4 (4)
#define Z80_RST5 (5)
#define Z80_RST6 (6)
#define Z80_RST7 (7)
#define Z80_IRQ_SYSTIMER Z80_RST7
#define NR_IRQS (8)
/* IRQ Stack Frame Format
*
* This stack frame is created on each interrupt. These registers are stored
* in the TCB to many context switches.
*/
#define XCPT_I (0) /* Offset 0: Saved I w/interrupt state in carry */
#define XCPT_BC (1) /* Offset 1: Saved BC register */
#define XCPT_DE (2) /* Offset 2: Saved DE register */
#define XCPT_IX (3) /* Offset 3: Saved IX register */
#define XCPT_IY (4) /* Offset 4: Saved IY register */
#define XCPT_SP (5) /* Offset 5: Offset to SP at time of interrupt */
#define XCPT_HL (6) /* Offset 6: Saved HL register */
#define XCPT_AF (7) /* Offset 7: Saved AF register */
#define XCPT_PC (8) /* Offset 8: Offset to PC at time of interrupt */
#define XCPTCONTEXT_REGS (9)
#define XCPTCONTEXT_SIZE (2 * XCPTCONTEXT_REGS)
/****************************************************************************
* Public Types
****************************************************************************/
#ifndef __ASSEMBLY__
/* This is the the type of the register save array */
typedef uint16 chipreg_t;
/* This struct defines the way the registers are stored. */
struct xcptcontext
{
/* Register save area */
uint16 regs[XCPTCONTEXT_REGS];
/* The following function pointer is non-zero if there
* are pending signals to be processed.
*/
#ifndef CONFIG_DISABLE_SIGNALS
void *sigdeliver; /* Actual type is sig_deliver_t */
/* The following retains that state during signal execution */
uint16 saved_pc; /* Saved return address */
uint16 saved_i; /* Saved interrupt state */
#endif
};
#endif
/****************************************************************************
* Inline functions
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifndef __ASSEMBLY__
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
EXTERN irqstate_t irqsave(void) __naked;
EXTERN void irqrestore(irqstate_t flags) __naked;
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif
#endif /* __ARCH_Z8_IRQ_H */
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