arch/m68k/include/asm/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 PSC3_SOURCE_BASE        24
  41 #define PSC4_SOURCE_BASE        32
  42 #define PSC5_SOURCE_BASE        40
  43 #define PSC6_SOURCE_BASE        48
  44 #define NUBUS_SOURCE_BASE       56
  45 #define BABOON_SOURCE_BASE      64
  46
  47 /*
  48  * Maximum IRQ number is BABOON_SOURCE_BASE + 7,
  49  * giving us IRQs up through 71
  50  */
  51
  52 #define NUM_MAC_SOURCES         72
  53
  54 /*
  55  * clean way to separate IRQ into its source and index
  56  */
  57
  58 #define IRQ_SRC(irq)    (irq >> 3)
  59 #define IRQ_IDX(irq)    (irq & 7)
  60
  61 /* VIA1 interrupts */
  62 #define IRQ_VIA1_0        (8)           /* one second int. */
  63 #define IRQ_VIA1_1        (9)           /* VBlank int. */
  64 #define IRQ_MAC_VBL       IRQ_VIA1_1
  65 #define IRQ_VIA1_2        (10)          /* ADB SR shifts complete */
  66 #define IRQ_MAC_ADB       IRQ_VIA1_2
  67 #define IRQ_MAC_ADB_SR    IRQ_VIA1_2
  68 #define IRQ_VIA1_3        (11)          /* ADB SR CB2 ?? */
  69 #define IRQ_MAC_ADB_SD    IRQ_VIA1_3
  70 #define IRQ_VIA1_4        (12)          /* ADB SR ext. clock pulse */
  71 #define IRQ_MAC_ADB_CL    IRQ_VIA1_4
  72 #define IRQ_VIA1_5        (13)
  73 #define IRQ_MAC_TIMER_2   IRQ_VIA1_5
  74 #define IRQ_VIA1_6        (14)
  75 #define IRQ_MAC_TIMER_1   IRQ_VIA1_6
  76 #define IRQ_VIA1_7        (15)
  77
  78 /* VIA2/RBV interrupts */
  79 #define IRQ_VIA2_0        (16)
  80 #define IRQ_MAC_SCSIDRQ   IRQ_VIA2_0
  81 #define IRQ_VIA2_1        (17)
  82 #define IRQ_MAC_NUBUS     IRQ_VIA2_1
  83 #define IRQ_VIA2_2        (18)
  84 #define IRQ_VIA2_3        (19)
  85 #define IRQ_MAC_SCSI      IRQ_VIA2_3
  86 #define IRQ_VIA2_4        (20)
  87 #define IRQ_VIA2_5        (21)
  88 #define IRQ_VIA2_6        (22)
  89 #define IRQ_VIA2_7        (23)
  90
  91 /* Level 3 (PSC, AV Macs only) interrupts */
  92 #define IRQ_PSC3_0        (24)
  93 #define IRQ_MAC_MACE      IRQ_PSC3_0
  94 #define IRQ_PSC3_1        (25)
  95 #define IRQ_PSC3_2        (26)
  96 #define IRQ_PSC3_3        (27)
  97
  98 /* Level 4 (PSC, AV Macs only) interrupts */
  99 #define IRQ_PSC4_0        (32)
 100 #define IRQ_PSC4_1        (33)
 101 #define IRQ_MAC_SCC_A     IRQ_PSC4_1
 102 #define IRQ_PSC4_2        (34)
 103 #define IRQ_MAC_SCC_B     IRQ_PSC4_2
 104 #define IRQ_PSC4_3        (35)
 105 #define IRQ_MAC_MACE_DMA  IRQ_PSC4_3
 106
 107 /* Level 5 (PSC, AV Macs only) interrupts */
 108 #define IRQ_PSC5_0        (40)
 109 #define IRQ_PSC5_1        (41)
 110 #define IRQ_PSC5_2        (42)
 111 #define IRQ_PSC5_3        (43)
 112
 113 /* Level 6 (PSC, AV Macs only) interrupts */
 114 #define IRQ_PSC6_0        (48)
 115 #define IRQ_PSC6_1        (49)
 116 #define IRQ_PSC6_2        (50)
 117 #define IRQ_PSC6_3        (51)
 118
 119 /* Nubus interrupts (cascaded to VIA2) */
 120 #define IRQ_NUBUS_9       (56)
 121 #define IRQ_NUBUS_A       (57)
 122 #define IRQ_NUBUS_B       (58)
 123 #define IRQ_NUBUS_C       (59)
 124 #define IRQ_NUBUS_D       (60)
 125 #define IRQ_NUBUS_E       (61)
 126 #define IRQ_NUBUS_F       (62)
 127
 128 /* Baboon interrupts (cascaded to nubus slot $C) */
 129 #define IRQ_BABOON_0      (64)
 130 #define IRQ_BABOON_1      (65)
 131 #define IRQ_BABOON_2      (66)
 132 #define IRQ_BABOON_3      (67)
 133
 134 /* On non-PSC machines, the serial ports share an IRQ */
 135 #define IRQ_MAC_SCC       IRQ_AUTO_4
 136
 137 #define SLOT2IRQ(x)       (x + 47)
 138 #define IRQ2SLOT(x)       (x - 47)
 139
 140 #define INT_CLK   24576     /* CLK while int_clk =2.456MHz and divide = 100 */
 141 #define INT_TICKS 246       /* to make sched_time = 99.902... HZ */
 142
 143 #endif /* asm/macints.h */