/*
** amigaints.h -- Amiga Linux interrupt handling structs and prototypes
**
** Copyright 1992 by Greg Harp
**
** This file is subject to the terms and conditions of the GNU General Public
** License. See the file COPYING in the main directory of this archive
** for more details.
**
** Created 10/2/92 by Greg Harp
*/

#ifndef _ASMm68k_AMIGAINTS_H_
#define _ASMm68k_AMIGAINTS_H_

#include <asm/irq.h>

/*
** Amiga Interrupt sources.
**
*/

#define AUTO_IRQS (8)
#define AMI_STD_IRQS (14)
#define CIA_IRQS (5)
#define AMI_IRQS (32) /* AUTO_IRQS+AMI_STD_IRQS+2*CIA_IRQS */

/* builtin serial port interrupts */
#define IRQ_AMIGA_TBE (IRQ_USER+0)
#define IRQ_AMIGA_RBF (IRQ_USER+11)

/* floppy disk interrupts */
#define IRQ_AMIGA_DSKBLK (IRQ_USER+1)
#define IRQ_AMIGA_DSKSYN (IRQ_USER+12)

/* software interrupts */
#define IRQ_AMIGA_SOFT (IRQ_USER+2)

/* interrupts from external hardware */
#define IRQ_AMIGA_PORTS IRQ_AUTO_2
#define IRQ_AMIGA_EXTER IRQ_AUTO_6

/* copper interrupt */
#define IRQ_AMIGA_COPPER (IRQ_USER+4)

/* vertical blanking interrupt */
#define IRQ_AMIGA_VERTB (IRQ_USER+5)

/* Blitter done interrupt */
#define IRQ_AMIGA_BLIT (IRQ_USER+6)

/* Audio interrupts */
#define IRQ_AMIGA_AUD0 (IRQ_USER+7)
#define IRQ_AMIGA_AUD1 (IRQ_USER+8)
#define IRQ_AMIGA_AUD2 (IRQ_USER+9)
#define IRQ_AMIGA_AUD3 (IRQ_USER+10)

/* CIA interrupt sources */
#define IRQ_AMIGA_CIAA (IRQ_USER+14)
#define IRQ_AMIGA_CIAA_TA (IRQ_USER+14)
#define IRQ_AMIGA_CIAA_TB (IRQ_USER+15)
#define IRQ_AMIGA_CIAA_ALRM (IRQ_USER+16)
#define IRQ_AMIGA_CIAA_SP (IRQ_USER+17)
#define IRQ_AMIGA_CIAA_FLG (IRQ_USER+18)
#define IRQ_AMIGA_CIAB (IRQ_USER+19)
#define IRQ_AMIGA_CIAB_TA (IRQ_USER+19)
#define IRQ_AMIGA_CIAB_TB (IRQ_USER+20)
#define IRQ_AMIGA_CIAB_ALRM (IRQ_USER+21)
#define IRQ_AMIGA_CIAB_SP (IRQ_USER+22)
#define IRQ_AMIGA_CIAB_FLG (IRQ_USER+23)


/* INTREQR masks */
#define IF_SETCLR 0x8000 /* set/clr bit */
#define IF_INTEN 0x4000 /* master interrupt bit in INT* registers */
#define IF_EXTER 0x2000 /* external level 6 and CIA B interrupt */
#define IF_DSKSYN 0x1000 /* disk sync interrupt */
#define IF_RBF 0x0800 /* serial receive buffer full interrupt */
#define IF_AUD3 0x0400 /* audio channel 3 done interrupt */
#define IF_AUD2 0x0200 /* audio channel 2 done interrupt */
#define IF_AUD1 0x0100 /* audio channel 1 done interrupt */
#define IF_AUD0 0x0080 /* audio channel 0 done interrupt */
#define IF_BLIT 0x0040 /* blitter done interrupt */
#define IF_VERTB 0x0020 /* vertical blanking interrupt */
#define IF_COPER 0x0010 /* copper interrupt */
#define IF_PORTS 0x0008 /* external level 2 and CIA A interrupt */
#define IF_SOFT 0x0004 /* software initiated interrupt */
#define IF_DSKBLK 0x0002 /* diskblock DMA finished */
#define IF_TBE 0x0001 /* serial transmit buffer empty interrupt */

/* CIA interrupt control register bits */

#define CIA_ICR_TA 0x01
#define CIA_ICR_TB 0x02
#define CIA_ICR_ALRM 0x04
#define CIA_ICR_SP 0x08
#define CIA_ICR_FLG 0x10
#define CIA_ICR_ALL 0x1f
#define CIA_ICR_SETCLR 0x80

extern void amiga_init_IRQ(void);

/* to access the interrupt control registers of CIA's use only
** these functions, they behave exactly like the amiga os routines
*/

extern struct ciabase ciaa_base, ciab_base;

extern void cia_init_IRQ(struct ciabase *base);
extern unsigned char cia_set_irq(struct ciabase *base, unsigned char mask);
extern unsigned char cia_able_irq(struct ciabase *base, unsigned char mask);

#endif /* asm-m68k/amigaints.h */