|
|
/****************************************************************************
* arch/ez80/include/ez80/irq.h
* arch/chip/irq.h
*
* Copyright (C) 2008-2009 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 (via arch/irq.h)
*/
#ifndef __ARCH_Z80_INCLUDE_EZ80_IRQ_H
#define __ARCH_Z80_INCLUDE_EZ80_IRQ_H
#ifndef _EZ80F91
# error "Only the EZ80F91 is currently supported"
#endif
/****************************************************************************
* Included Files
****************************************************************************/
#ifndef __ASSEMBLY__
# include <stdint.h>
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* ez80 Interrupt Numbers ***************************************************/
#define EZ80_EMACRX_IRQ (0) /* Vector 0x40 */
#define EZ80_EMACTX_IRQ (1) /* Vector 0x44 */
#define EZ80_EMACSYS_IRQ (2) /* Vector 0x48 */
#define EZ80_PLL_IRQ (3) /* Vector 0x4c */
#define EZ80_FLASH_IRQ (4) /* Vector 0x50 */
#define EZ80_TIMER0_IRQ (5) /* Vector 0x54 */
#define EZ80_TIMER1_IRQ (6) /* Vector 0x58 */
#define EZ80_TIMER2_IRQ (7) /* Vector 0x5c */
#define EZ80_TIMER3_IRQ (8) /* Vector 0x60 */
#define EZ80_RTC_IRQ (9) /* Vector 0x6C */
#define EZ80_UART0_IRQ (10) /* Vector 0x70 */
#define EZ80_UART1_IRQ (11) /* Vector 0x74 */
#define EZ80_I2C_IRQ (12) /* Vector 0x78 */
#define EZ80_SPI_IRQ (13) /* Vector 0x7c */
#define EZ80_PORTA0_IRQ (14) /* Vector 0x80 */
#define EZ80_PORTA1_IRQ (15) /* Vector 0x84 */
#define EZ80_PORTA2_IRQ (16) /* Vector 0x88 */
#define EZ80_PORTA3_IRQ (17) /* Vector 0x8c */
#define EZ80_PORTA4_IRQ (18) /* Vector 0x90 */
#define EZ80_PORTA5_IRQ (19) /* Vector 0x94 */
#define EZ80_PORTA6_IRQ (20) /* Vector 0x98 */
#define EZ80_PORTA7_IRQ (21) /* Vector 0x9c */
#define EZ80_PORTB0_IRQ (22) /* Vector 0xa0 */
#define EZ80_PORTB1_IRQ (23) /* Vector 0xa4 */
#define EZ80_PORTB2_IRQ (24) /* Vector 0xa8 */
#define EZ80_PORTB3_IRQ (25) /* Vector 0xac */
#define EZ80_PORTB4_IRQ (26) /* Vector 0xb0 */
#define EZ80_PORTB5_IRQ (27) /* Vector 0xb4 */
#define EZ80_PORTB6_IRQ (28) /* Vector 0xb8 */
#define EZ80_PORTB7_IRQ (29) /* Vector 0xbc */
#define EZ80_PORTC0_IRQ (30) /* Vector 0xc0 */
#define EZ80_PORTC1_IRQ (31) /* Vector 0xc4 */
#define EZ80_PORTC2_IRQ (32) /* Vector 0xc8 */
#define EZ80_PORTC3_IRQ (33) /* Vector 0xcc */
#define EZ80_PORTC4_IRQ (34) /* Vector 0xd0 */
#define EZ80_PORTC5_IRQ (35) /* Vector 0xd4 */
#define EZ80_PORTC6_IRQ (36) /* Vector 0xd8 */
#define EZ80_PORTC7_IRQ (37) /* Vector 0xdc */
#define EZ80_PORTD0_IRQ (38) /* Vector 0xe0 */
#define EZ80_PORTD1_IRQ (39) /* Vector 0xe4 */
#define EZ80_PORTD2_IRQ (40) /* Vector 0xe8 */
#define EZ80_PORTD3_IRQ (41) /* Vector 0xec */
#define EZ80_PORTD4_IRQ (42) /* Vector 0xf0 */
#define EZ80_PORTD5_IRQ (43) /* Vector 0xf4 */
#define EZ80_PORTD6_IRQ (44) /* Vector 0xf8 */
#define EZ80_PORTD7_IRQ (45) /* Vector 0xfc */
#define NR_IRQS (46)
#define EZ80_IRQ_SYSTIMER EZ80_TIMER0_IRQ
/* IRQ Management Macros ****************************************************/
/* IRQ State Save Format ****************************************************
*
* These indices describe how the ez8 context is save in the state save array
*
* Byte offsets:
*/
/* IRQ Stack Frame Format
*
* This stack frame is created on each interrupt. These registers are stored
* in the TCB to many context switches.
*/
/* chipreg_t indices */
#define XCPT_I (0) /* Index 0: 16-bit interrupt vector register */
#define XCPT_BC (1) /* Index 1: Saved 16-bit BC register */
#define XCPT_DE (2) /* Index 2: Saved 16-bit DE register */
#define XCPT_IX (3) /* Index 3: Saved 16-bit IX register */
#define XCPT_IY (4) /* Index 4: Saved 16-bit IY register */
#define XCPT_SP (5) /* Index 5: Saved 16-bit SP at time of interrupt */
#define XCPT_HL (6) /* Index 6: Saved 16-bit HL register */
#define XCPT_AF (7) /* Index 7: Saved 16-bit AF register */
#define XCPT_PC (8) /* Index 8: Offset to 16-bit PC at time of interrupt */
#define XCPTCONTEXT_REGS (9)
#ifdef CONFIG_EZ80_Z80MODE
/* Byte offsets */
# define XCPT_I_OFFSET (2*XCPT_I) /* Offset 0: 16-bit interrupt vector register */
# define XCPT_IF_OFFSET (2*XCPT_I+0) /* Offset 1: Saved flags. P set if interrupts enabled */
# define XCPT_IA_OFFSET (2*XCPT_I+1) /* Offset 2: Saved lower 8-bits of interrupt vector register */
# define XCPT_BC_OFFSET (2*XCPT_BC) /* Offset 2: Saved 16-bit BC register */
# define XCPT_C_OFFSET (2*XCPT_BC+0) /* Offset 2: Saved 8-bit C register */
# define XCPT_B_OFFSET (2*XCPT_BC+1) /* Offset 3: Saved 8-bit D register */
# define XCPT_DE_OFFSET (2*XCPT_DE) /* Offset 4: Saved 16-bit DE register */
# define XCPT_E_OFFSET (2*XCPT_DE+0) /* Offset 4: Saved 8-bit E register */
# define XCPT_D_OFFSET (2*XCPT_DE+1) /* Offset 5: Saved 8-bit D register */
# define XCPT_IX_OFFSET (2*XCPT_IX) /* Offset 6: Saved 16-bit IX register */
# define XCPT_IY_OFFSET (2*XCPT_IY) /* Offset 8: Saved 16-bit IY register */
# define XCPT_SP_OFFSET (2*XCPT_SP) /* Offset 10: Saved 16-bit SP at time of interrupt */
# define XCPT_HL_OFFSET (2*XCPT_HL) /* Offset 12: Saved 16-bit HL register */
# define XCPT_L_OFFSET (2*XCPT_HL+0) /* Offset 12: Saved 8-bit L register */
# define XCPT_H_OFFSET (2*XCPT_HL+1) /* Offset 13: Saved 8-bit H register */
# define XCPT_AF_OFFSET (2*XCPT_AF) /* Offset 14: Saved 16-bit AF register */
# define XCPT_F_OFFSET (2*XCPT_AF+0) /* Offset 14: Saved flags */
# define XCPT_A_OFFSET (2*XCPT_AF+1) /* Offset 15: Saved 8-bit A register */
# define XCPT_PC_OFFSET (2*XCPT_PC) /* Offset 16: Offset to 16-bit PC at time of interrupt */
# define XCPTCONTEXT_SIZE (2*XCPTCONTEXT_REGS)
#else
/* Byte offsets */
# define XCPT_I_OFFSET (3*XCPT_I) /* Offset 0: Saved 24-bit interrupt vector register */
# define XCPT_IF_OFFSET (2*XCPT_I+1) /* Offset 1: Saved flags. P set if interrupts enabled */
# define XCPT_IA_OFFSET (2*XCPT_I+2) /* Offset 2: Saved lower 8-bits of interrupt vector register */
# define XCPT_BC_OFFSET (3*XCPT_BC) /* Offset 3: Saved 24-bit BC register */
# define XCPT_C_OFFSET (3*XCPT_BC+1) /* Offset 4: Saved 8-bit C register */
# define XCPT_B_OFFSET (3*XCPT_BC+2) /* Offset 5: Saved 8-bit D register */
# define XCPT_DE_OFFSET (3*XCPT_DE) /* Offset 6: Saved 24-bit DE register */
# define XCPT_E_OFFSET (3*XCPT_DE+1) /* Offset 7: Saved 8-bit E register */
# define XCPT_D_OFFSET (3*XCPT_DE+2) /* Offset 8: Saved 8-bit D register */
# define XCPT_IX_OFFSET (3*XCPT_IX) /* Offset 9: Saved 24-bit IX register */
# define XCPT_IY_OFFSET (3*XCPT_IY) /* Offset 12: Saved 24-bit IY register */
# define XCPT_SP_OFFSET (3*XCPT_SP) /* Offset 15: Saved 24-bit SP at time of interrupt */
# define XCPT_HL_OFFSET (3*XCPT_HL) /* Offset 18: Saved 24-bit HL register */
# define XCPT_L_OFFSET (3*XCPT_HL+1) /* Offset 19: Saved 8-bit L register */
# define XCPT_H_OFFSET (3*XCPT_HL+2) /* Offset 20: Saved 8-bit H register */
# define XCPT_AF_OFFSET (3*XCPT_AF) /* Offset 21: Saved AF register */
# define XCPT_F_OFFSET (3*XCPT_AF+1) /* Offset 22: Saved AF register */
# define XCPT_A_OFFSET (3*XCPT_AF+2) /* Offset 23: Saved 8-bit A register */
# define XCPT_PC_OFFSET (3*XCPT_PC) /* Offset 24: Offset to 24-bit PC at time of interrupt */
# define XCPTCONTEXT_SIZE (3*XCPTCONTEXT_REGS)
#endif
/****************************************************************************
* Public Types
****************************************************************************/
#ifndef __ASSEMBLY__
/* This is the type of the register save array */
#ifdef CONFIG_EZ80_Z80MODE
typedef uint16_t chipreg_t;
#else
typedef uint24_t chipreg_t;
#endif
/* This struct defines the way the registers are stored. */
struct xcptcontext
{
/* Register save area */
chipreg_t regs[XCPTCONTEXT_REGS];
/* The following function pointer is non-zero if there
* are pending signals to be processed.
*/
#ifndef CONFIG_DISABLE_SIGNALS
CODE void *sigdeliver; /* Actual type is sig_deliver_t */
/* The following retains that state during signal execution */
chipreg_t saved_pc; /* Saved return address */
chipreg_t 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);
EXTERN void irqrestore(irqstate_t flags);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif
#endif /* __ARCH_Z80_INCLUDE_EZ80_IRQ_H */
|
