114 lines
3.5 KiB
C
114 lines
3.5 KiB
C
/*
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** amigaints.h -- Amiga Linux interrupt handling structs and prototypes
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**
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** Copyright 1992 by Greg Harp
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**
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** This file is subject to the terms and conditions of the GNU General Public
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** License. See the file COPYING in the main directory of this archive
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** for more details.
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**
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** Created 10/2/92 by Greg Harp
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*/
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#ifndef _ASMm68k_AMIGAINTS_H_
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#define _ASMm68k_AMIGAINTS_H_
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#include <asm/irq.h>
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/*
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** Amiga Interrupt sources.
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**
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*/
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#define AUTO_IRQS (8)
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#define AMI_STD_IRQS (14)
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#define CIA_IRQS (5)
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#define AMI_IRQS (32) /* AUTO_IRQS+AMI_STD_IRQS+2*CIA_IRQS */
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/* builtin serial port interrupts */
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#define IRQ_AMIGA_TBE (IRQ_USER+0)
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#define IRQ_AMIGA_RBF (IRQ_USER+11)
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/* floppy disk interrupts */
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#define IRQ_AMIGA_DSKBLK (IRQ_USER+1)
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#define IRQ_AMIGA_DSKSYN (IRQ_USER+12)
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/* software interrupts */
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#define IRQ_AMIGA_SOFT (IRQ_USER+2)
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/* interrupts from external hardware */
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#define IRQ_AMIGA_PORTS IRQ_AUTO_2
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#define IRQ_AMIGA_EXTER IRQ_AUTO_6
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/* copper interrupt */
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#define IRQ_AMIGA_COPPER (IRQ_USER+4)
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/* vertical blanking interrupt */
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#define IRQ_AMIGA_VERTB (IRQ_USER+5)
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/* Blitter done interrupt */
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#define IRQ_AMIGA_BLIT (IRQ_USER+6)
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/* Audio interrupts */
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#define IRQ_AMIGA_AUD0 (IRQ_USER+7)
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#define IRQ_AMIGA_AUD1 (IRQ_USER+8)
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#define IRQ_AMIGA_AUD2 (IRQ_USER+9)
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#define IRQ_AMIGA_AUD3 (IRQ_USER+10)
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/* CIA interrupt sources */
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#define IRQ_AMIGA_CIAA (IRQ_USER+14)
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#define IRQ_AMIGA_CIAA_TA (IRQ_USER+14)
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#define IRQ_AMIGA_CIAA_TB (IRQ_USER+15)
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#define IRQ_AMIGA_CIAA_ALRM (IRQ_USER+16)
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#define IRQ_AMIGA_CIAA_SP (IRQ_USER+17)
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#define IRQ_AMIGA_CIAA_FLG (IRQ_USER+18)
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#define IRQ_AMIGA_CIAB (IRQ_USER+19)
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#define IRQ_AMIGA_CIAB_TA (IRQ_USER+19)
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#define IRQ_AMIGA_CIAB_TB (IRQ_USER+20)
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#define IRQ_AMIGA_CIAB_ALRM (IRQ_USER+21)
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#define IRQ_AMIGA_CIAB_SP (IRQ_USER+22)
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#define IRQ_AMIGA_CIAB_FLG (IRQ_USER+23)
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/* INTREQR masks */
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#define IF_SETCLR 0x8000 /* set/clr bit */
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#define IF_INTEN 0x4000 /* master interrupt bit in INT* registers */
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#define IF_EXTER 0x2000 /* external level 6 and CIA B interrupt */
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#define IF_DSKSYN 0x1000 /* disk sync interrupt */
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#define IF_RBF 0x0800 /* serial receive buffer full interrupt */
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#define IF_AUD3 0x0400 /* audio channel 3 done interrupt */
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#define IF_AUD2 0x0200 /* audio channel 2 done interrupt */
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#define IF_AUD1 0x0100 /* audio channel 1 done interrupt */
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#define IF_AUD0 0x0080 /* audio channel 0 done interrupt */
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#define IF_BLIT 0x0040 /* blitter done interrupt */
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#define IF_VERTB 0x0020 /* vertical blanking interrupt */
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#define IF_COPER 0x0010 /* copper interrupt */
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#define IF_PORTS 0x0008 /* external level 2 and CIA A interrupt */
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#define IF_SOFT 0x0004 /* software initiated interrupt */
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#define IF_DSKBLK 0x0002 /* diskblock DMA finished */
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#define IF_TBE 0x0001 /* serial transmit buffer empty interrupt */
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/* CIA interrupt control register bits */
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#define CIA_ICR_TA 0x01
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#define CIA_ICR_TB 0x02
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#define CIA_ICR_ALRM 0x04
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#define CIA_ICR_SP 0x08
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#define CIA_ICR_FLG 0x10
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#define CIA_ICR_ALL 0x1f
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#define CIA_ICR_SETCLR 0x80
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extern void amiga_init_IRQ(void);
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/* to access the interrupt control registers of CIA's use only
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** these functions, they behave exactly like the amiga os routines
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*/
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extern struct ciabase ciaa_base, ciab_base;
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extern void cia_init_IRQ(struct ciabase *base);
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extern unsigned char cia_set_irq(struct ciabase *base, unsigned char mask);
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extern unsigned char cia_able_irq(struct ciabase *base, unsigned char mask);
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#endif /* asm-m68k/amigaints.h */
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