linux/include/asm-m68k/mac_oss.h
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   1/*
   2 *      OSS
   3 *
   4 *      This is used in place of VIA2 on the IIfx.
   5 */
   6
   7#define OSS_BASE        (0x50f1a000)
   8
   9/*
  10 * Interrupt level offsets for mac_oss->irq_level
  11 */
  12
  13#define OSS_NUBUS0      0
  14#define OSS_NUBUS1      1
  15#define OSS_NUBUS2      2
  16#define OSS_NUBUS3      3
  17#define OSS_NUBUS4      4
  18#define OSS_NUBUS5      5
  19#define OSS_IOPISM      6
  20#define OSS_IOPSCC      7
  21#define OSS_SOUND       8
  22#define OSS_SCSI        9
  23#define OSS_60HZ        10
  24#define OSS_VIA1        11
  25#define OSS_UNUSED1     12
  26#define OSS_UNUSED2     13
  27#define OSS_PARITY      14
  28#define OSS_UNUSED3     15
  29
  30#define OSS_NUM_SOURCES 16
  31
  32/*
  33 * Pending interrupt bits in mac_oss->irq_pending
  34 */
  35
  36#define OSS_IP_NUBUS0   0x0001
  37#define OSS_IP_NUBUS1   0x0002
  38#define OSS_IP_NUBUS2   0x0004
  39#define OSS_IP_NUBUS3   0x0008
  40#define OSS_IP_NUBUS4   0x0010
  41#define OSS_IP_NUBUS5   0x0020
  42#define OSS_IP_IOPISM   0x0040
  43#define OSS_IP_IOPSCC   0x0080
  44#define OSS_IP_SOUND    0x0100
  45#define OSS_IP_SCSI     0x0200
  46#define OSS_IP_60HZ     0x0400
  47#define OSS_IP_VIA1     0x0800
  48#define OSS_IP_UNUSED1  0x1000
  49#define OSS_IP_UNUSED2  0x2000
  50#define OSS_IP_PARITY   0x4000
  51#define OSS_IP_UNUSED3  0x8000
  52
  53#define OSS_IP_NUBUS (OSS_IP_NUBUS0|OSS_IP_NUBUS1|OSS_IP_NUBUS2|OSS_IP_NUBUS3|OSS_IP_NUBUS4|OSS_IP_NUBUS5)
  54
  55/*
  56 * Rom Control Register
  57 */
  58
  59#define OSS_POWEROFF    0x80
  60
  61/*
  62 * OSS Interrupt levels for various sub-systems
  63 *
  64 * This mapping is layed out with two things in mind: first, we try to keep
  65 * things on their own levels to avoid having to do double-dispatches. Second,
  66 * the levels match as closely as possible the alternate IRQ mapping mode (aka
  67 * "A/UX mode") available on some VIA machines.
  68 */
  69
  70#define OSS_IRQLEV_DISABLED     0
  71#define OSS_IRQLEV_IOPISM       1       /* ADB? */
  72#define OSS_IRQLEV_SCSI         IRQ_AUTO_2
  73#define OSS_IRQLEV_NUBUS        IRQ_AUTO_3      /* keep this on its own level */
  74#define OSS_IRQLEV_IOPSCC       IRQ_AUTO_4      /* matches VIA alternate mapping */
  75#define OSS_IRQLEV_SOUND        IRQ_AUTO_5      /* matches VIA alternate mapping */
  76#define OSS_IRQLEV_60HZ         6       /* matches VIA alternate mapping */
  77#define OSS_IRQLEV_VIA1         IRQ_AUTO_6      /* matches VIA alternate mapping */
  78#define OSS_IRQLEV_PARITY       7       /* matches VIA alternate mapping */
  79
  80#ifndef __ASSEMBLY__
  81
  82struct mac_oss {
  83    __u8  irq_level[0x10];      /* [0x000-0x00f] Interrupt levels */
  84    __u8  padding0[0x1F2];      /* [0x010-0x201] IO space filler */
  85    __u16 irq_pending;          /* [0x202-0x203] pending interrupts bits */
  86    __u8  rom_ctrl;             /* [0x204-0x204] ROM cntl reg (for poweroff) */
  87    __u8  padding1[0x2];        /* [0x205-0x206] currently unused by A/UX */
  88    __u8  ack_60hz;             /* [0x207-0x207] 60 Hz ack. */
  89};
  90
  91extern volatile struct mac_oss *oss;
  92extern int oss_present;
  93
  94#endif /* __ASSEMBLY__ */
  95
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