/*
 * Interrupt handler Header file
 *
 * Copyright (c) 2004 by Jay Monkman <jtm@lopingdog.com>
 *	
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *
 *  $Id$
 */

#ifndef __IRQ_H__
#define __IRQ_H__

#ifdef __cplusplus
extern "C" {
#endif

  /* define that can be useful (the values are just examples) */
#ifndef __asm__

/*
 * Include some preprocessor value also used by assember code
 */
  
#include <rtems.h>
#include <lpc22xx.h>

extern void default_int_handler();
/***********************************************************************
 * Constants
 **********************************************************************/

/* possible interrupt sources on the LPC22xx */
#define LPC22xx_INTERRUPT_WDINT	 0	/* Watchdog int. 0 */
#define LPC22xx_INTERRUPT_RSV0	 1	/* Reserved int. 1 */
#define LPC22xx_INTERRUPT_DBGRX	 2	/* Embedded ICE DbgCommRx receive */
#define LPC22xx_INTERRUPT_DBGTX	 3	/* Embedded ICE DbgCommRx Transmit*/
#define LPC22xx_INTERRUPT_TIMER0 4	/* Timer 0 */
#define LPC22xx_INTERRUPT_TIMER1 5	/* Timer 1 */
#define LPC22xx_INTERRUPT_UART0	 6	/* UART 0 */
#define LPC22xx_INTERRUPT_UART1  7	/* UART 1 */
#define LPC22xx_INTERRUPT_PWM0 	 8	/* PWM */
#define LPC22xx_INTERRUPT_I2C 	 9	/* I2C  */
#define LPC22xx_INTERRUPT_SPI0 	10	/* SPI0 */
#define LPC22xx_INTERRUPT_SPI1 	11	/* SPI1 */
#define LPC22xx_INTERRUPT_PLL 	12	/* PLL */
#define LPC22xx_INTERRUPT_RTC 	13	/* RTC */
#define LPC22xx_INTERRUPT_EINT0	14	/* Externel Interrupt 0 */
#define LPC22xx_INTERRUPT_EINT1	15	/* Externel Interrupt 1 */
#define LPC22xx_INTERRUPT_EINT2	16	/* Externel Interrupt 2 */
#define LPC22xx_INTERRUPT_EINT3	17	/* Externel Interrupt 3 */
#define LPC22xx_INTERRUPT_ADC 	18	/* AD Converter */
#define LPC22xx_INTERRUPT_CANERR 19	/* CAN LUTerr interrupt */
#define LPC22xx_INTERRUPT_CAN1TX 20	/* CAN1 Tx interrupt */
#define LPC22xx_INTERRUPT_CAN1RX 21	/* CAN1 Rx interrupt */
#define LPC22xx_INTERRUPT_CAN2TX 22	/* CAN2 Tx interrupt */
#define LPC22xx_INTERRUPT_CAN2RX 23	/* CAN2 Rx interrupt */
#define LPC22xx_INTERRUPT_CAN3TX 24	/* CAN1 Tx interrupt */
#define LPC22xx_INTERRUPT_CAN3RX 25	/* CAN1 Rx interrupt */
#define LPC22xx_INTERRUPT_CAN4TX 26	/* CAN2 Tx interrupt */
#define LPC22xx_INTERRUPT_CAN4RX 27	/* CAN2 Rx interrupt */
#define BSP_MAX_INT              28

#define UNDEFINED_INSTRUCTION_VECTOR_ADDR   (*(u_long *)0x00000004L)   
#define SOFTWARE_INTERRUPT_VECTOR_ADDR      (*(u_long *)0x00000008L)
#define PREFETCH_ABORT_VECTOR_ADDR          (*(u_long *)0x0000000CL)
#define DATA_ABORT_VECTOR_ADDR              (*(u_long *)0x00000010L)
#define IRQ_VECTOR_ADDR                     (*(u_long *)0x00000018L)
#define FIQ_VECTOR_ADDR                     (*(u_long *)0x0000001CL)

#define DATA_ABORT_ISR_ADDR                 (*(u_long *)0x00000030L)
#define IRQ_ISR_ADDR                        (*(u_long *)0x00000038L)
#define FIQ_ISR_ADDR                        (*(u_long *)0x0000003CL)

              
typedef unsigned char  rtems_irq_level;
typedef unsigned char  rtems_irq_trigger;

typedef unsigned int rtems_irq_number;
struct  __rtems_irq_connect_data__;     /* forward declaratiuon */

typedef void (*rtems_irq_hdl)       (void);
typedef void (*rtems_irq_enable)    (const struct __rtems_irq_connect_data__*);
typedef void (*rtems_irq_disable)   (const struct __rtems_irq_connect_data__*);
typedef int  (*rtems_irq_is_enabled)(const struct __rtems_irq_connect_data__*);

//extern rtems_irq_hdl bsp_vector_table[BSP_MAX_INT];
#define VECTOR_TABLE VICVectAddrBase
  											   
typedef struct __rtems_irq_connect_data__ {
    /* IRQ line */
    rtems_irq_number              name;

    /* Handler */
    rtems_irq_hdl                 hdl;

    /* function for enabling interrupts at device level. */
    rtems_irq_enable              on;

    /* function for disabling interrupts at device level. */
    rtems_irq_disable             off;

    /* Function to test if interrupt is enabled */
    rtems_irq_is_enabled        isOn;

    /* priority level of interrupt */
    rtems_irq_level               irqLevel;

    /* Trigger method (rising/falling edge or high/low level) */
    rtems_irq_trigger             irqTrigger;
} rtems_irq_connect_data;

/*
 * function to initialize the interrupt for a specific BSP
 */
void BSP_rtems_irq_mngt_init();


/*
 * function to connect a particular irq handler.
 */
int BSP_install_rtems_irq_handler       (const rtems_irq_connect_data*);

/*
 * function to get the current RTEMS irq handler for ptr->name. 
 */
int BSP_get_current_rtems_irq_handler   (rtems_irq_connect_data* ptr);

/*
 * function to disconnect the RTEMS irq handler for ptr->name.
 */
int BSP_remove_rtems_irq_handler        (const rtems_irq_connect_data*);

#endif /* __asm__ */

#ifdef __cplusplus
}
#endif

#endif /* __IRQ_H__ */