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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2** macints.h -- Macintosh Linux interrupt handling structs and prototypes
3**
4** Copyright 1997 by Michael Schmitz
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*/
11
12#ifndef _ASM_MACINTS_H_
13#define _ASM_MACINTS_H_
14
15#include <asm/irq.h>
16
17/* Setting this prints debugging info for unclaimed interrupts */
18
19#define DEBUG_SPURIOUS
20
21/* Setting this prints debugging info on each autovector interrupt */
22
23/* #define DEBUG_IRQS */
24
25/* Setting this prints debugging info on each Nubus interrupt */
26
27/* #define DEBUG_NUBUS_INT */
28
29/* Setting this prints debugging info on irqs as they enabled and disabled. */
30
31/* #define DEBUG_IRQUSE */
32
33/*
34 * Base IRQ number for all Mac68K interrupt sources. Each source
35 * has eight indexes (base -> base+7).
36 */
37
38#define VIA1_SOURCE_BASE 8
39#define VIA2_SOURCE_BASE 16
40#define MAC_SCC_SOURCE_BASE 24
41#define PSC3_SOURCE_BASE 24
42#define PSC4_SOURCE_BASE 32
43#define PSC5_SOURCE_BASE 40
44#define PSC6_SOURCE_BASE 48
45#define NUBUS_SOURCE_BASE 56
46#define BABOON_SOURCE_BASE 64
47
48/*
49 * Maximum IRQ number is BABOON_SOURCE_BASE + 7,
50 * giving us IRQs up through 71
51 */
52
53#define NUM_MAC_SOURCES 72
54
55/*
56 * clean way to separate IRQ into its source and index
57 */
58
59#define IRQ_SRC(irq) (irq >> 3)
60#define IRQ_IDX(irq) (irq & 7)
61
Linus Torvalds1da177e2005-04-16 15:20:36 -070062/* VIA1 interrupts */
63#define IRQ_VIA1_0 (8) /* one second int. */
64#define IRQ_VIA1_1 (9) /* VBlank int. */
65#define IRQ_MAC_VBL IRQ_VIA1_1
66#define IRQ_VIA1_2 (10) /* ADB SR shifts complete */
67#define IRQ_MAC_ADB IRQ_VIA1_2
68#define IRQ_MAC_ADB_SR IRQ_VIA1_2
69#define IRQ_VIA1_3 (11) /* ADB SR CB2 ?? */
70#define IRQ_MAC_ADB_SD IRQ_VIA1_3
71#define IRQ_VIA1_4 (12) /* ADB SR ext. clock pulse */
72#define IRQ_MAC_ADB_CL IRQ_VIA1_4
73#define IRQ_VIA1_5 (13)
74#define IRQ_MAC_TIMER_2 IRQ_VIA1_5
75#define IRQ_VIA1_6 (14)
76#define IRQ_MAC_TIMER_1 IRQ_VIA1_6
77#define IRQ_VIA1_7 (15)
78
79/* VIA2/RBV interrupts */
80#define IRQ_VIA2_0 (16)
81#define IRQ_MAC_SCSIDRQ IRQ_VIA2_0
82#define IRQ_VIA2_1 (17)
83#define IRQ_MAC_NUBUS IRQ_VIA2_1
84#define IRQ_VIA2_2 (18)
85#define IRQ_VIA2_3 (19)
86#define IRQ_MAC_SCSI IRQ_VIA2_3
87#define IRQ_VIA2_4 (20)
88#define IRQ_VIA2_5 (21)
89#define IRQ_VIA2_6 (22)
90#define IRQ_VIA2_7 (23)
91
92/* Level 3 (PSC, AV Macs only) interrupts */
93#define IRQ_PSC3_0 (24)
94#define IRQ_MAC_MACE IRQ_PSC3_0
95#define IRQ_PSC3_1 (25)
96#define IRQ_PSC3_2 (26)
97#define IRQ_PSC3_3 (27)
98
99/* Level 4 (SCC) interrupts */
100#define IRQ_SCC (32)
101#define IRQ_SCCA (33)
102#define IRQ_SCCB (34)
103#if 0 /* FIXME: are there multiple interrupt conditions on the SCC ?? */
104/* SCC interrupts */
105#define IRQ_SCCB_TX (32)
106#define IRQ_SCCB_STAT (33)
107#define IRQ_SCCB_RX (34)
108#define IRQ_SCCB_SPCOND (35)
109#define IRQ_SCCA_TX (36)
110#define IRQ_SCCA_STAT (37)
111#define IRQ_SCCA_RX (38)
112#define IRQ_SCCA_SPCOND (39)
113#endif
114
115/* Level 4 (PSC, AV Macs only) interrupts */
116#define IRQ_PSC4_0 (32)
117#define IRQ_PSC4_1 (33)
118#define IRQ_PSC4_2 (34)
119#define IRQ_PSC4_3 (35)
120#define IRQ_MAC_MACE_DMA IRQ_PSC4_3
121
122/* Level 5 (PSC, AV Macs only) interrupts */
123#define IRQ_PSC5_0 (40)
124#define IRQ_PSC5_1 (41)
125#define IRQ_PSC5_2 (42)
126#define IRQ_PSC5_3 (43)
127
128/* Level 6 (PSC, AV Macs only) interrupts */
129#define IRQ_PSC6_0 (48)
130#define IRQ_PSC6_1 (49)
131#define IRQ_PSC6_2 (50)
132#define IRQ_PSC6_3 (51)
133
134/* Nubus interrupts (cascaded to VIA2) */
135#define IRQ_NUBUS_9 (56)
136#define IRQ_NUBUS_A (57)
137#define IRQ_NUBUS_B (58)
138#define IRQ_NUBUS_C (59)
139#define IRQ_NUBUS_D (60)
140#define IRQ_NUBUS_E (61)
141#define IRQ_NUBUS_F (62)
142
143/* Baboon interrupts (cascaded to nubus slot $C) */
144#define IRQ_BABOON_0 (64)
145#define IRQ_BABOON_1 (65)
146#define IRQ_BABOON_2 (66)
147#define IRQ_BABOON_3 (67)
148
149#define SLOT2IRQ(x) (x + 47)
150#define IRQ2SLOT(x) (x - 47)
151
152#define INT_CLK 24576 /* CLK while int_clk =2.456MHz and divide = 100 */
153#define INT_TICKS 246 /* to make sched_time = 99.902... HZ */
154
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155#endif /* asm/macints.h */