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 /*
  18 ** Macintosh Interrupt sources.
  19 **
  20 ** Note: these are all routed via the generic VIA interrupt routine!
  21 **
  22 */
  23
  24 #define SRC_VIA1                0
  25 #define SRC_VIA2                1
  26
  27 #define VIA1_SOURCE_BASE        8
  28 #define VIA2_SOURCE_BASE        16
  29 #define RBV_SOURCE_BASE         24
  30 #define MAC_SCC_SOURCE_BASE     32
  31 #define NUBUS_SOURCE_BASE       56
  32 #define NUBUS_MAX_SOURCES       8
  33
  34 /* FIXME: sources not contigous ... */
  35 #define NUM_MAC_SOURCES   (NUBUS_SOURCE_BASE+NUBUS_MAX_SOURCES-VIA1_SOURCE_BASE)
  36
  37 #define IRQ_SRC_MASK (VIA1_SOURCE_BASE|VIA2_SOURCE_BASE|MAC_SCC_SOURCE_BASE)
  38 #define IRQ_IDX_MASK 7
  39
  40 /*
  41  * quick hack to adapt old MACHSPEC-aware source
  42  */
  43 #define IRQ_IDX(irq)    (irq)
  44
  45 /* interrupt service types */
  46 #define IRQ_TYPE_SLOW     0
  47 #define IRQ_TYPE_FAST     1
  48 #define IRQ_TYPE_PRIO     2
  49
  50 #define IRQ_SPURIOUS      (0)
  51
  52 /* auto-vector interrupts */
  53 #define IRQ_AUTO_1        (1)
  54 #define IRQ_AUTO_2        (2)
  55 #define IRQ_AUTO_3        (3)
  56 #define IRQ_AUTO_4        (4)
  57 #define IRQ_AUTO_5        (5)
  58 #define IRQ_AUTO_6        (6)
  59 #define IRQ_AUTO_7        (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 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 #if 0
  92 /* RBV interrupts */
  93 #define IRQ_RBV_0         (24)
  94 #define IRQ_RBV_1         (25)
  95 #define IRQ_RBV_2         (26)
  96 #define IRQ_RBV_3         (27)
  97 #define IRQ_RBV_4         (28)
  98 #define IRQ_RBV_5         (29)
  99 #define IRQ_RBV_6         (30)
 100 #define IRQ_RBV_7         (31)
 101 #endif
 102
 103 /* Level 3 (PSC, AV Macs only) interrupts */
 104 #define IRQ_PSC3_0        (24)
 105 #define IRQ_MAC_MACE      IRQ_PSC3_0
 106 #define IRQ_PSC3_1        (25)
 107 #define IRQ_PSC3_2        (26)
 108 #define IRQ_PSC3_3        (27)
 109
 110 /* Level 4 (SCC) interrupts */
 111 #define IRQ_SCC              (32)
 112 #define IRQ_SCCB             (33)
 113 #define IRQ_SCCA             (34)
 114 #if 0 /* FIXME: are there multiple interrupt conditions on the SCC ?? */
 115 /* SCC interrupts */
 116 #define IRQ_SCCB_TX          (32)
 117 #define IRQ_SCCB_STAT        (33)
 118 #define IRQ_SCCB_RX          (34)
 119 #define IRQ_SCCB_SPCOND      (35)
 120 #define IRQ_SCCA_TX          (36)
 121 #define IRQ_SCCA_STAT        (37)
 122 #define IRQ_SCCA_RX          (38)
 123 #define IRQ_SCCA_SPCOND      (39)
 124 #endif
 125
 126 /* Level 4 (PSC, AV Macs only) interrupts */
 127 #define IRQ_PSC4_0        (32)
 128 #define IRQ_PSC4_1        (33)
 129 #define IRQ_PSC4_2        (34)
 130 #define IRQ_PSC4_3        (35)
 131 #define IRQ_MAC_MACE_DMA  IRQ_PSC4_3
 132
 133 /* Level 5 (PSC, AV Macs only) interrupts */
 134 #define IRQ_PSC5_0        (40)
 135 #define IRQ_PSC5_1        (41)
 136 #define IRQ_PSC5_2        (42)
 137 #define IRQ_PSC5_3        (43)
 138
 139 /* Level 6 (PSC, AV Macs only) interrupts */
 140 #define IRQ_PSC6_0        (48)
 141 #define IRQ_PSC6_1        (49)
 142 #define IRQ_PSC6_2        (50)
 143 #define IRQ_PSC6_3        (51)
 144
 145 /* Nubus interrupts (cascaded to VIA2) */
 146 #define IRQ_NUBUS_1       (56)
 147
 148 #define INT_CLK   24576     /* CLK while int_clk =2.456MHz and divide = 100 */
 149 #define INT_TICKS 246       /* to make sched_time = 99.902... HZ */
 150
 151
 152 #define VIA_ENABLE      0
 153 #define VIA_PENDING     1
 154 #define VIA_SERVICE     2
 155 #define VIA_MASK        3
 156
 157 /*
 158  * Utility functions for setting/clearing bits in the interrupt registers of
 159  * the VIA.
 160  */
 161
 162 void mac_enable_irq( unsigned irq );
 163 void mac_disable_irq( unsigned irq );
 164 void mac_turnon_irq( unsigned irq );
 165 void mac_turnoff_irq( unsigned irq );
 166 void mac_clear_pending_irq( unsigned irq );
 167 int  mac_irq_pending( unsigned irq );
 168 int  nubus_request_irq(int slot, void *dev_id, void (*handler)(int,void *,struct pt_regs *));
 169 int  nubus_free_irq(int slot);
 170
 171 unsigned long mac_register_nubus_int( void );
 172 void mac_unregister_nubus_int( unsigned long );
 173
 174 extern void mac_default_handler(int irq, void *dev_id, struct pt_regs *regs);
 175 extern void via1_irq(int irq, void *dev_id, struct pt_regs *regs);
 176 extern void via2_irq(int irq, void *dev_id, struct pt_regs *regs);
 177 extern void  rbv_irq(int irq, void *dev_id, struct pt_regs *regs);
 178 extern void mac_bang(int irq, void *dev_id, struct pt_regs *regs);
 179
 180 extern void mac_SCC_handler(int irq, void *dev_id, struct pt_regs *regs);
 181
 182 #endif /* asm/macints.h */