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amigaints.h
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1 /*
2 ** amigaints.h -- Amiga Linux interrupt handling structs and prototypes
3 **
4 ** Copyright 1992 by Greg Harp
5 **
6 ** This file is subject to the terms and conditions of the GNU General Public
7 ** License. See the file COPYING in the main directory of this archive
8 ** for more details.
9 **
10 ** Created 10/2/92 by Greg Harp
11 */
12 
13 #ifndef _ASMm68k_AMIGAINTS_H_
14 #define _ASMm68k_AMIGAINTS_H_
15 
16 #include <asm/irq.h>
17 
18 /*
19 ** Amiga Interrupt sources.
20 **
21 */
22 
23 #define AUTO_IRQS (8)
24 #define AMI_STD_IRQS (14)
25 #define CIA_IRQS (5)
26 #define AMI_IRQS (32) /* AUTO_IRQS+AMI_STD_IRQS+2*CIA_IRQS */
27 
28 /* builtin serial port interrupts */
29 #define IRQ_AMIGA_TBE (IRQ_USER+0)
30 #define IRQ_AMIGA_RBF (IRQ_USER+11)
31 
32 /* floppy disk interrupts */
33 #define IRQ_AMIGA_DSKBLK (IRQ_USER+1)
34 #define IRQ_AMIGA_DSKSYN (IRQ_USER+12)
35 
36 /* software interrupts */
37 #define IRQ_AMIGA_SOFT (IRQ_USER+2)
38 
39 /* interrupts from external hardware */
40 #define IRQ_AMIGA_PORTS IRQ_AUTO_2
41 #define IRQ_AMIGA_EXTER IRQ_AUTO_6
42 
43 /* copper interrupt */
44 #define IRQ_AMIGA_COPPER (IRQ_USER+4)
45 
46 /* vertical blanking interrupt */
47 #define IRQ_AMIGA_VERTB (IRQ_USER+5)
48 
49 /* Blitter done interrupt */
50 #define IRQ_AMIGA_BLIT (IRQ_USER+6)
51 
52 /* Audio interrupts */
53 #define IRQ_AMIGA_AUD0 (IRQ_USER+7)
54 #define IRQ_AMIGA_AUD1 (IRQ_USER+8)
55 #define IRQ_AMIGA_AUD2 (IRQ_USER+9)
56 #define IRQ_AMIGA_AUD3 (IRQ_USER+10)
57 
58 /* CIA interrupt sources */
59 #define IRQ_AMIGA_CIAA (IRQ_USER+14)
60 #define IRQ_AMIGA_CIAA_TA (IRQ_USER+14)
61 #define IRQ_AMIGA_CIAA_TB (IRQ_USER+15)
62 #define IRQ_AMIGA_CIAA_ALRM (IRQ_USER+16)
63 #define IRQ_AMIGA_CIAA_SP (IRQ_USER+17)
64 #define IRQ_AMIGA_CIAA_FLG (IRQ_USER+18)
65 #define IRQ_AMIGA_CIAB (IRQ_USER+19)
66 #define IRQ_AMIGA_CIAB_TA (IRQ_USER+19)
67 #define IRQ_AMIGA_CIAB_TB (IRQ_USER+20)
68 #define IRQ_AMIGA_CIAB_ALRM (IRQ_USER+21)
69 #define IRQ_AMIGA_CIAB_SP (IRQ_USER+22)
70 #define IRQ_AMIGA_CIAB_FLG (IRQ_USER+23)
71 
72 
73 /* INTREQR masks */
74 #define IF_SETCLR 0x8000 /* set/clr bit */
75 #define IF_INTEN 0x4000 /* master interrupt bit in INT* registers */
76 #define IF_EXTER 0x2000 /* external level 6 and CIA B interrupt */
77 #define IF_DSKSYN 0x1000 /* disk sync interrupt */
78 #define IF_RBF 0x0800 /* serial receive buffer full interrupt */
79 #define IF_AUD3 0x0400 /* audio channel 3 done interrupt */
80 #define IF_AUD2 0x0200 /* audio channel 2 done interrupt */
81 #define IF_AUD1 0x0100 /* audio channel 1 done interrupt */
82 #define IF_AUD0 0x0080 /* audio channel 0 done interrupt */
83 #define IF_BLIT 0x0040 /* blitter done interrupt */
84 #define IF_VERTB 0x0020 /* vertical blanking interrupt */
85 #define IF_COPER 0x0010 /* copper interrupt */
86 #define IF_PORTS 0x0008 /* external level 2 and CIA A interrupt */
87 #define IF_SOFT 0x0004 /* software initiated interrupt */
88 #define IF_DSKBLK 0x0002 /* diskblock DMA finished */
89 #define IF_TBE 0x0001 /* serial transmit buffer empty interrupt */
90 
91 /* CIA interrupt control register bits */
92 
93 #define CIA_ICR_TA 0x01
94 #define CIA_ICR_TB 0x02
95 #define CIA_ICR_ALRM 0x04
96 #define CIA_ICR_SP 0x08
97 #define CIA_ICR_FLG 0x10
98 #define CIA_ICR_ALL 0x1f
99 #define CIA_ICR_SETCLR 0x80
100 
101 extern void amiga_init_IRQ(void);
102 
103 /* to access the interrupt control registers of CIA's use only
104 ** these functions, they behave exactly like the amiga os routines
105 */
106 
107 extern struct ciabase ciaa_base, ciab_base;
108 
109 extern void cia_init_IRQ(struct ciabase *base);
110 extern unsigned char cia_set_irq(struct ciabase *base, unsigned char mask);
111 extern unsigned char cia_able_irq(struct ciabase *base, unsigned char mask);
112 
113 #endif /* asm-m68k/amigaints.h */