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 /* 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 62 /* 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 */ 154 155 #endif /* asm/macints.h */ 156