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 #define INT_CLK 24576 /* CLK while int_clk =2.456MHz and divide = 100 */ 125 #define INT_TICKS 246 /* to make sched_time = 99.902... HZ */ 126 127 #endif /* asm/macints.h */ 128