nes-proj/cpu/mc1322x/lib/include/isr.h

/*
 * Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
 * to the MC1322x project (http://mc1322x.devl.org)
 * All rights reserved.
 *
 * 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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 is part of libmc1322x: see http://mc1322x.devl.org
 * for details. 
 *
 * $Id: isr.h,v 1.6 2010/11/10 22:06:28 maralvira Exp $
 */

#ifndef ISR_H
#define ISR_H

#define INTBASE        (0x80020000)

#include <stdint.h>

/* Structure-based ITC access */
#define __INTERRUPT_union(x)		  \
		union {			  \
			uint32_t x;	  \
			struct ITC_##x {  \
			uint32_t ASM:1;	  \
			uint32_t UART1:1; \
			uint32_t UART2:1; \
			uint32_t CRM:1;	  \
			uint32_t I2C:1;	  \
			uint32_t TMR:1;	  \
			uint32_t SPIF:1;  \
			uint32_t MACA:1;  \
			uint32_t SSI:1;	  \
			uint32_t ADC:1;	  \
			uint32_t SPI:1;	  \
			uint32_t :21;	  \
			} x##bits; \
		};

struct ITC_struct {
	union {
		uint32_t INTCNTL;
		struct ITC_INTCNTL {
			uint32_t :19;
			uint32_t FIAD:1;
			uint32_t NIAD:1;
			uint32_t :11;
		} INTCNTLbits;
	};
	uint32_t NIMASK;
	uint32_t INTENNUM;
	uint32_t INTDISNUM;
	__INTERRUPT_union(INTENABLE);
	__INTERRUPT_union(INTTYPE);
	uint32_t reserved[4];
	uint32_t NIVECTOR;
	uint32_t FIVECTOR;
	__INTERRUPT_union(INTSRC);
	__INTERRUPT_union(INTFRC);
	__INTERRUPT_union(NIPEND);
	__INTERRUPT_union(FIPEND);
};
#undef __INTERRUPT_union

static volatile struct ITC_struct * const ITC = (void *) (INTBASE);


/* Old register definitions, for compatibility */
#ifndef REG_NO_COMPAT

#define INTCNTL_OFF           (0x0)
#define INTENNUM_OFF          (0x8)
#define INTDISNUM_OFF         (0xC)
#define INTENABLE_OFF        (0x10)
#define INTSRC_OFF           (0x30)
#define INTFRC_OFF           (0x34)
#define NIPEND_OFF           (0x38)

static volatile uint32_t * const INTCNTL   =   ((volatile uint32_t *) (INTBASE + INTCNTL_OFF));
static volatile uint32_t * const INTENNUM  =   ((volatile uint32_t *) (INTBASE + INTENNUM_OFF));
static volatile uint32_t * const INTDISNUM =   ((volatile uint32_t *) (INTBASE + INTDISNUM_OFF));
static volatile uint32_t * const INTENABLE =   ((volatile uint32_t *) (INTBASE + INTENABLE_OFF));
static volatile uint32_t * const INTSRC    =   ((volatile uint32_t *) (INTBASE + INTSRC_OFF));
static volatile uint32_t * const INTFRC    =   ((volatile uint32_t *) (INTBASE + INTFRC_OFF));
static volatile uint32_t * const NIPEND    =   ((volatile uint32_t *) (INTBASE + NIPEND_OFF));

enum interrupt_nums {
	INT_NUM_ASM = 0,
	INT_NUM_UART1,
	INT_NUM_UART2,
	INT_NUM_CRM,
	INT_NUM_I2C,
	INT_NUM_TMR,
	INT_NUM_SPIF,
	INT_NUM_MACA,
	INT_NUM_SSI,
	INT_NUM_ADC,
	INT_NUM_SPI,
};

#define global_irq_disable() (set_bit(*INTCNTL,20))
#define global_irq_enable()  (clear_bit(*INTCNTL,20))

#define enable_irq(irq)  (*INTENNUM  = INT_NUM_##irq)
#define disable_irq(irq) (*INTDISNUM = INT_NUM_##irq)

#define safe_irq_disable(x)  volatile uint32_t saved_irq; saved_irq = *INTENABLE; disable_irq(x)
#define irq_restore() *INTENABLE = saved_irq

#endif /* REG_NO_COMPAT */

/* Macro to safely disable all interrupts for a block of code.
   Use it like this:
   disable_int({
       asdf = 1234;
       printf("hi\r\n");
   });
*/
#define __int_top() volatile uint32_t saved_intenable
#define __int_disable() saved_intenable = ITC->INTENABLE; ITC->INTENABLE = 0
#define __int_enable() ITC->INTENABLE = saved_intenable
#define disable_int(x) do { \
        __int_top(); \
        __int_disable(); \
        x; \
        __int_enable(); } while(0)


extern void tmr0_isr(void) __attribute__((weak));
extern void tmr1_isr(void) __attribute__((weak));
extern void tmr2_isr(void) __attribute__((weak));
extern void tmr3_isr(void) __attribute__((weak));

extern void rtc_isr(void) __attribute__((weak));
extern void kbi4_isr(void) __attribute__((weak));
extern void kbi5_isr(void) __attribute__((weak));
extern void kbi6_isr(void) __attribute__((weak));
extern void kbi7_isr(void) __attribute__((weak));

extern void cal_isr(void) __attribute__((weak));

extern void uart1_isr(void) __attribute__((weak));

extern void maca_isr(void) __attribute__((weak));


#endif