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/************************************************************************************
* arch/sh/include/m16c/irq.h
*
* Copyright (C) 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_SH_INCLUDE_M16C_IRQ_H
#define __ARCH_SH_INCLUDE_M16C_IRQ_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#ifndef __ASSEMBLY__
# include <stdint.h>
#endif
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* IRQ numbers **********************************************************************/
/* Fixed vector table */
#define M16C_UNDEFINST_IRQ 0 /* fffdc: Undefined instruction */
#define M16C_OVERFLOW_IRQ 1 /* fffe0: Overflow */
#define M16C_BRK_IRQ 2 /* fffe4: BRK instruction */
#define M16C_ADDRMATCH_IRQ 3 /* fffe8: Address match */
#ifdef CONFIG_M16C_DEBUGGER
# define M16C_SSTEP_IRQ 4 /* fffec: Single step */
# define M16C_WDOG_IRQ 5 /* ffff0: Watchdog timer */
# define M16C_DBC_IRQ 6 /* ffff4: DBC */
# define M16C_NMI_IRQ 7 /* ffff8: NMI */
# define _LAST_FIXED 7
#else
# define M16C_WDOG_IRQ 4 /* ffff0: Watchdog timer */
# define M16C_NMI_IRQ 5 /* ffff8: NMI */
# define _LAST_FIXED 5
#endif
/* Variable vector table (fixed at address 0xffd00) */
#ifdef CONFIG_M16C_SWINTS
# define M16C_BRK_IRQ (_LAST_FIXED+1) /* ffd00: BRK instruction */
# define M16C_SWINT0_IRQ M16C_BRK_IRQ /* S/W interrupt 0 */
# define M16C_INT3_IRQ (_LAST_FIXED+2) /* ffd10: INT3 */
# define M16C_SWINT4_IRQ M16C_INT3_IRQ /* S/W interrupt 4 */
# define M16C_CTXSV_SWINT (_LAST_FIXED+3) /* ffd14: Reserved -- used by NuttX */
# define M16C_SWINT5_IRQ M16C_CTXSV_SWINT /* S/W interrupt 5 */
# define M16C_SWINT6_IRQ (_LAST_FIXED+4) /* ffd18: Reserved / S/W interrupt 6 */
# define M16C_SWINT7_IRQ (_LAST_FIXED+5) /* ffd1c: Reserved / S/W interrupt 7 */
# define M16C_INT5_IRQ (_LAST_FIXED+6) /* ffd20: INT5 */
# define M16C_SWINT8_IRQ M16C_INT5_IRQ /* S/W interrupt 8 */
# define M16C_INT4_IRQ (_LAST_FIXED+7) /* ffd24: INT4 */
# define M16C_SWINT9_IRQ M16C_INT4_IRQ /* S/W interrupt 9 */
# define M16C_UART2BCD_IRQ (_LAST_FIXED+8) /* ffd28: UART2 bus collision detection */
# define M16C_SWINT10_IRQ M16C_UART2BCD_IRQ /* S/W interrupt 10 */
# define M16C_DMA0_IRQ (_LAST_FIXED+9) /* ffd2c: DMA0 */
# define M16C_SWINT11_IRQ M16C_DMA0_IRQ /* S/W interrupt 11 */
# define M16C_DMA1_IRQ (_LAST_FIXED+10) /* ffd30: DMA1 */
# define M16C_SWINT12_IRQ M16C_DMA1_IRQ /* S/W interrupt 12 */
# define M16C_KEYINP_IRQ (_LAST_FIXED+11) /* ffd34: Key input interrupt */
# define M16C_SWINT13_IRQ M16C_KEYINP_IRQ /* S/W interrupt 13 */
# define M16C_ADC_IRQ (_LAST_FIXED+12) /* ffd38: A-D */
# define M16C_SWINT14_IRQ M16C_ADC_IRQ /* S/W interrupt 14 */
# define M16C_UARTXNAK_IRQ (_LAST_FIXED+13) /* ffd3c UART2 transmit/NACK2 */
# define M16C_SWINT15_IRQ M16C_UARTNAK_IRQ /* S/W interrupt 15 */
# define M16C_UARTRACK_IRQ (_LAST_FIXED+14) /* ffd40: UART2 receive/ACK2 */
# define M16C_SWINT16_IRQ M16C_UARTRACK_IRQ /* S/W interrupt 16 */
# define M16C_UART0XMT_IRQ (_LAST_FIXED+15) /* ffd44: UART0 transmit */
# define M16C_SWINT17_IRQ M16C_UART0XMT_IRQ /* S/W interrupt 17 */
# define M16C_UART0RCV_IRQ (_LAST_FIXED+16) /* ffd48: UART0 receive */
# define M16C_SWINT18_IRQ M16C_UART0RCV_IRQ /* S/W interrupt 18 */
# define M16C_UART1XMT_IRQ (_LAST_FIXED+17) /* ffd4c: UART1 transmit */
# define M16C_SWINT19_IRQ M16C_UART1XMT_IRQ /* S/W interrupt 19 */
# define M16C_UART1RCV_IRQ (_LAST_FIXED+18) /* ffd50: UART1 receive */
# define M16C_SWINT20_IRQ M16C_UART1RCV_IRQ /* S/W interrupt 20 */
# define M16C_TMRA0_IRQ (_LAST_FIXED+19) /* ffd54: Timer A0 */
# define M16C_SWINT21_IRQ M16C_TMRA0_IRQ /* S/W interrupt 21 */
# define M16C_TMRA1_IRQ (_LAST_FIXED+20) /* ffd58: Timer A1 */
# define M16C_SWINT22_IRQ M16C_TMRA1_IRQ /* S/W interrupt 22 */
# define M16C_TMRA2_IRQ (_LAST_FIXED+21) /* ffd5c: Timer A2 */
# define M16C_SWINT23_IRQ M16C_TMRA2_IRQ /* S/W interrupt 23 */
# define M16C_TMRA3_IRQ (_LAST_FIXED+22) /* ffd60: Timer A3 */
# define M16C_SWINT24_IRQ M16C_TMRA3_IRQ /* S/W interrupt 24 */
# define M16C_TMRA4_IRQ (_LAST_FIXED+23) /* ffd64: Timer A4 */
# define M16C_SWINT25_IRQ M16C_TMRA4_IRQ /* S/W interrupt 25 */
# define M16C_TMRB0_IRQ (_LAST_FIXED+24) /* ffd68: Timer B0 */
# define M16C_SWINT26_IRQ M16C_TMRB0_IRQ /* S/W interrupt 26 */
# define M16C_TMRB1_IRQ (_LAST_FIXED+25) /* ffd6c: Timer B1 */
# define M16C_SWINT27_IRQ M16C_TMRB1_IRQ /* S/W interrupt 27 */
# define M16C_TMRB2_IRQ (_LAST_FIXED+26) /* ffd70: Timer B2 */
# define M16C_SWINT28_IRQ M16C_TMRB2_IRQ /* S/W interrupt 28 */
# define M16C_INT0_IRQ (_LAST_FIXED+27) /* ffd74: INT0 */
# define M16C_SWINT29_IRQ M16C_INT0_IRQ /* S/W interrupt 29 */
# define M16C_INT1_IRQ (_LAST_FIXED+28) /* ffd78: INT1 */
# define M16C_SWINT30_IRQ M16C_INT1_IRQ /* S/W interrupt 30 */
# define M16C_SWINT31_IRQ (_LAST_FIXED+29) /* ffd7c: Reserved / S/W interrupt 31 */
# define M16C_CTXRSTR_SWINT (_LAST_FIXED+30) /* ffd80: Used by NuttX */
# define M16C_SWINT32IRQ M16C_CTXRSTR_SWINT /* S/W interrupt 32 */
# define M16C_SWINT33_IRQ (_LAST_FIXED+31) /* ffd84: S/W interrupt 33 */
# define M16C_SWINT34_IRQ (_LAST_FIXED+32) /* ffd88: S/W interrupt 34 */
# define M16C_SWINT35_IRQ (_LAST_FIXED+33) /* ffd8c: S/W interrupt 35 */
# define M16C_SWINT36_IRQ (_LAST_FIXED+34) /* ffd90: S/W interrupt 36 */
# define M16C_SWINT37_IRQ (_LAST_FIXED+35) /* ffd94: S/W interrupt 37 */
# define M16C_SWINT38_IRQ (_LAST_FIXED+36) /* ffd98: S/W interrupt 38 */
# define M16C_SWINT39_IRQ (_LAST_FIXED+37) /* ffd9c: S/W interrupt 39 */
# define M16C_SWINT40_IRQ (_LAST_FIXED+38) /* ffda0: S/W interrupt 40 */
# define M16C_SWINT41_IRQ (_LAST_FIXED+39) /* ffda4: S/W interrupt 41 */
# define M16C_SWINT42_IRQ (_LAST_FIXED+40) /* ffda8: S/W interrupt 42 */
# define M16C_SWINT43_IRQ (_LAST_FIXED+41) /* ffdac: S/W interrupt 43 */
# define M16C_SWINT44_IRQ (_LAST_FIXED+42) /* ffdb0: S/W interrupt 44 */
# define M16C_SWINT45_IRQ (_LAST_FIXED+43) /* ffdb4: S/W interrupt 45 */
# define M16C_SWINT46_IRQ (_LAST_FIXED+44) /* ffdb8: S/W interrupt 46 */
# define M16C_SWINT47_IRQ (_LAST_FIXED+45) /* ffdbc: S/W interrupt 47 */
# define M16C_SWINT48_IRQ (_LAST_FIXED+46) /* ffdc0: S/W interrupt 48 */
# define M16C_SWINT49_IRQ (_LAST_FIXED+47) /* ffdc4: S/W interrupt 49 */
# define M16C_SWINT50_IRQ (_LAST_FIXED+48) /* ffdc8: S/W interrupt 50 */
# define M16C_SWINT51_IRQ (_LAST_FIXED+49) /* ffdcc: S/W interrupt 51 */
# define M16C_SWINT52_IRQ (_LAST_FIXED+50) /* ffdd0: S/W interrupt 52 */
# define M16C_SWINT53_IRQ (_LAST_FIXED+51) /* ffdd4: S/W interrupt 53 */
# define M16C_SWINT54_IRQ (_LAST_FIXED+52) /* ffdd8: S/W interrupt 54 */
# define M16C_SWINT55_IRQ (_LAST_FIXED+53) /* ffddc: S/W interrupt 55 */
# define M16C_SWINT56_IRQ (_LAST_FIXED+54) /* ffde0: S/W interrupt 56 */
# define M16C_SWINT57_IRQ (_LAST_FIXED+55) /* ffde4: S/W interrupt 57 */
# define M16C_SWINT58_IRQ (_LAST_FIXED+56) /* ffde8: S/W interrupt 58 */
# define M16C_SWINT59_IRQ (_LAST_FIXED+57) /* ffdec: S/W interrupt 59 */
# define M16C_SWINT60_IRQ (_LAST_FIXED+58) /* ffdf0: S/W interrupt 60 */
# define M16C_SWINT61_IRQ (_LAST_FIXED+59) /* ffdf4: S/W interrupt 61 */
# define M16C_SWINT62_IRQ (_LAST_FIXED+60) /* ffdf8: S/W interrupt 62 */
# define M16C_SWINT63_IRQ (_LAST_FIXED+61) /* ffdfc: S/W interrupt 63 */
# define NR_IRQS (_LAST_FIXED+62) /* Total number of supported IRQs */
#else
# define M16C_BRK_IRQ (_LAST_FIXED+1) /* ffd00: BRK instruction */
# define M16C_INT3_IRQ (_LAST_FIXED+2) /* ffd10: INT3 */
# define M16C_CTXSV_SWINT (_LAST_FIXED+3) /* ffd14: Reserved -- SWINT5 used by NuttX */
# define M16C_INT5_IRQ (_LAST_FIXED+5) /* ffd20: INT5 */
# define M16C_INT4_IRQ (_LAST_FIXED+6) /* ffd24: INT4 */
# define M16C_UART2BCD_IRQ (_LAST_FIXED+7) /* ffd28: UART2 bus collision detection */
# define M16C_DMA0_IRQ (_LAST_FIXED+8) /* ffd2c: DMA0 */
# define M16C_DMA1_IRQ (_LAST_FIXED+9) /* ffd30: DMA1 */
# define M16C_KEYINP_IRQ (_LAST_FIXED+10) /* ffd34: Key input interrupt */
# define M16C_ADC_IRQ (_LAST_FIXED+11) /* ffd38: A-D */
# define M16C_UARTXNAK_IRQ (_LAST_FIXED+12) /* ffd3c UART2 transmit/NACK2 */
# define M16C_UARTRACK_IRQ (_LAST_FIXED+13) /* ffd40: UART2 receive/ACK2 */
# define M16C_UART0XMT_IRQ (_LAST_FIXED+14) /* ffd44: UART0 transmit */
# define M16C_UART0RCV_IRQ (_LAST_FIXED+15) /* ffd48: UART0 receive */
# define M16C_UART1XMT_IRQ (_LAST_FIXED+16) /* ffd4c: UART1 transmit */
# define M16C_UART1RCV_IRQ (_LAST_FIXED+17) /* ffd50: UART1 receive */
# define M16C_TMRA0_IRQ (_LAST_FIXED+18) /* ffd54: Timer A0 */
# define M16C_TMRA1_IRQ (_LAST_FIXED+19) /* ffd58: Timer A1 */
# define M16C_TMRA2_IRQ (_LAST_FIXED+20) /* ffd5c: Timer A2 */
# define M16C_TMRA3_IRQ (_LAST_FIXED+21) /* ffd60: Timer A3 */
# define M16C_TMRA4_IRQ (_LAST_FIXED+22) /* ffd64: Timer A4 */
# define M16C_TMRB0_IRQ (_LAST_FIXED+23) /* ffd68: Timer B0 */
# define M16C_TMRB1_IRQ (_LAST_FIXED+24) /* ffd6c: Timer B1 */
# define M16C_TMRB2_IRQ (_LAST_FIXED+25) /* ffd70: Timer B2 */
# define M16C_INT0_IRQ (_LAST_FIXED+26) /* ffd74: INT0 */
# define M16C_INT1_IRQ (_LAST_FIXED+27) /* ffd78: INT1 */
# define M16C_CTXRSTR_SWINT (_LAST_FIXED+4) /* ffd80: S/W interrupt 32, used by NuttX */
# define NR_IRQS (_LAST_FIXED+28) /* Total number of supported IRQs */
#endif
/* Timer A0 is the system timer used by NuttX */
#define M16C_SYSTIMER_IRQ M16C_TMRA0_IRQ
/* IRQ Stack Frame Format. The M16C has a push down stack. The CPU performs
* the following actions when an interrupt is taken:
*
* - Save FLG register
* - Clear I, D, and U flags in FLG register
* - Builds stack frame like:
*
* sp -> PC bits 0-7
* sp+1 -> PC bits 8-15
* sp+2 -> FLG bits 0-7
* sp+3 -> FLG (Bits 12-14) + PC (bits 16-19)
*
* - Sets IPL
* - Vectors to interrupt handler
*/
#define REG_FLGPCHI 0 /* 8-bit FLG (bits 12-14) + PC (bits 16-19) as would be
* presented by an interrupt */
#define REG_FLG 1 /* 8-bit FLG register (bits 0-7) */
#define REG_PC 2 /* 16-bit PC [0]:bits8-15 [1]:bits 0-7 */
#define REG_FB 4 /* 16-bit FB register */
#define REG_SB 6 /* 16-bit SB register */
#define REG_A1 8 /* 16-bit A1 register */
#define REG_A0 10 /* 16-bit A0 register */
#define REG_R3 12 /* 16-bit R3 register */
#define REG_R2 14 /* 16-bit R2 register */
#define REG_R1 16 /* 16-bit R1 register */
#define REG_R0 18 /* 16-bit R0 register */
#define REG_SP 20 /* 16-bit user stack pointer */
#define XCPTCONTEXT_SIZE 22
/************************************************************************************
* Public Types
************************************************************************************/
/* This struct defines the way the registers are stored. We need to save: */
#ifndef __ASSEMBLY__
struct xcptcontext
{
/* 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 */
/* These are saved copies of LR and SR used during signal processing. */
uint8_t saved_pc[2];
uint8_t saved_flg;
#endif
/* Register save area */
uint8_t regs[XCPTCONTEXT_SIZE];
};
#endif
/************************************************************************************
* Public Data
************************************************************************************/
#ifndef __ASSEMBLY__
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/************************************************************************************
* Inline Functions
************************************************************************************/
#ifndef __ASSEMBLY__
/* Save the current interrupt enable state & disable IRQs */
static inline irqstate_t irqsave(void)
{
irqstate_t flags;
__asm__ __volatile__
(
"\tstc flg, %0\n"
"\tfclr I\n"
: "=r" (flags)
:
: "memory");
return flags;
}
/* Restore saved IRQ & FIQ state */
static inline void irqrestore(irqstate_t flags)
{
__asm__ __volatile__
(
"ldc %0, flg"
:
: "r" (flags)
: "memory");
}
#endif
/************************************************************************************
* Public Functions
************************************************************************************/
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif
#endif /* __ARCH_SH_INCLUDE_M16C_IRQ_H */
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