1 /*
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 /*
18  * Base IRQ number for all Mac68K interrupt sources. Each source
19  * has eight indexes (base -> base+7).
20  */
21 
22 #define VIA1_SOURCE_BASE	8
23 #define VIA2_SOURCE_BASE	16
24 #define PSC3_SOURCE_BASE	24
25 #define PSC4_SOURCE_BASE	32
26 #define PSC5_SOURCE_BASE	40
27 #define PSC6_SOURCE_BASE	48
28 #define NUBUS_SOURCE_BASE	56
29 #define BABOON_SOURCE_BASE	64
30 
31 /*
32  * Maximum IRQ number is BABOON_SOURCE_BASE + 7,
33  * giving us IRQs up through 71
34  */
35 
36 #define NUM_MAC_SOURCES		72
37 
38 /*
39  * clean way to separate IRQ into its source and index
40  */
41 
42 #define IRQ_SRC(irq)	(irq >> 3)
43 #define	IRQ_IDX(irq)	(irq & 7)
44 
45 /* VIA1 interrupts */
46 #define IRQ_VIA1_0	  (8)		/* one second int. */
47 #define IRQ_VIA1_1        (9)		/* VBlank int. */
48 #define IRQ_MAC_VBL	  IRQ_VIA1_1
49 #define IRQ_VIA1_2	  (10)		/* ADB SR shifts complete */
50 #define IRQ_MAC_ADB	  IRQ_VIA1_2
51 #define IRQ_MAC_ADB_SR	  IRQ_VIA1_2
52 #define IRQ_VIA1_3	  (11)		/* ADB SR CB2 ?? */
53 #define IRQ_MAC_ADB_SD	  IRQ_VIA1_3
54 #define IRQ_VIA1_4        (12)		/* ADB SR ext. clock pulse */
55 #define IRQ_MAC_ADB_CL	  IRQ_VIA1_4
56 #define IRQ_VIA1_5	  (13)
57 #define IRQ_MAC_TIMER_2	  IRQ_VIA1_5
58 #define IRQ_VIA1_6	  (14)
59 #define IRQ_MAC_TIMER_1	  IRQ_VIA1_6
60 #define IRQ_VIA1_7        (15)
61 
62 /* VIA2/RBV interrupts */
63 #define IRQ_VIA2_0	  (16)
64 #define IRQ_MAC_SCSIDRQ	  IRQ_VIA2_0
65 #define IRQ_VIA2_1        (17)
66 #define IRQ_MAC_NUBUS	  IRQ_VIA2_1
67 #define IRQ_VIA2_2	  (18)
68 #define IRQ_VIA2_3	  (19)
69 #define IRQ_MAC_SCSI	  IRQ_VIA2_3
70 #define IRQ_VIA2_4        (20)
71 #define IRQ_VIA2_5	  (21)
72 #define IRQ_VIA2_6	  (22)
73 #define IRQ_VIA2_7        (23)
74 
75 /* Level 3 (PSC, AV Macs only) interrupts */
76 #define IRQ_PSC3_0	  (24)
77 #define IRQ_MAC_MACE	  IRQ_PSC3_0
78 #define IRQ_PSC3_1	  (25)
79 #define IRQ_PSC3_2	  (26)
80 #define IRQ_PSC3_3	  (27)
81 
82 /* Level 4 (PSC, AV Macs only) interrupts */
83 #define IRQ_PSC4_0	  (32)
84 #define IRQ_PSC4_1	  (33)
85 #define IRQ_MAC_SCC_A	  IRQ_PSC4_1
86 #define IRQ_PSC4_2	  (34)
87 #define IRQ_MAC_SCC_B	  IRQ_PSC4_2
88 #define IRQ_PSC4_3	  (35)
89 #define IRQ_MAC_MACE_DMA  IRQ_PSC4_3
90 
91 /* OSS Level 4 interrupts */
92 #define IRQ_MAC_SCC	  (33)
93 
94 /* Level 5 (PSC, AV Macs only) interrupts */
95 #define IRQ_PSC5_0	  (40)
96 #define IRQ_PSC5_1	  (41)
97 #define IRQ_PSC5_2	  (42)
98 #define IRQ_PSC5_3	  (43)
99 
100 /* Level 6 (PSC, AV Macs only) interrupts */
101 #define IRQ_PSC6_0	  (48)
102 #define IRQ_PSC6_1	  (49)
103 #define IRQ_PSC6_2	  (50)
104 #define IRQ_PSC6_3	  (51)
105 
106 /* Nubus interrupts (cascaded to VIA2) */
107 #define IRQ_NUBUS_9	  (56)
108 #define IRQ_NUBUS_A	  (57)
109 #define IRQ_NUBUS_B	  (58)
110 #define IRQ_NUBUS_C	  (59)
111 #define IRQ_NUBUS_D	  (60)
112 #define IRQ_NUBUS_E	  (61)
113 #define IRQ_NUBUS_F	  (62)
114 
115 /* Baboon interrupts (cascaded to nubus slot $C) */
116 #define IRQ_BABOON_0	  (64)
117 #define IRQ_BABOON_1	  (65)
118 #define IRQ_BABOON_2	  (66)
119 #define IRQ_BABOON_3	  (67)
120 
121 #define SLOT2IRQ(x)	  (x + 47)
122 #define IRQ2SLOT(x)	  (x - 47)
123 
124 #endif /* asm/macints.h */
125