include/asm-m68k/macints.h

   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 */