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mac_oss.h

/*
 *    OSS
 *
 *    This is used in place of VIA2 on the IIfx.
 */

#define OSS_BASE  (0x50f1a000)

/*
 * Interrupt level offsets for mac_oss->irq_level
 */

#define OSS_NUBUS0      0
#define OSS_NUBUS1      1
#define OSS_NUBUS2      2
#define OSS_NUBUS3      3
#define OSS_NUBUS4      4
#define OSS_NUBUS5      5
#define OSS_IOPISM      6
#define OSS_IOPSCC      7
#define OSS_SOUND 8
#define OSS_SCSI  9
#define OSS_60HZ  10
#define OSS_VIA1  11
#define OSS_UNUSED1     12
#define OSS_UNUSED2     13
#define OSS_PARITY      14
#define OSS_UNUSED3     15

#define OSS_NUM_SOURCES 16

/*
 * Pending interrupt bits in mac_oss->irq_pending
 */

#define OSS_IP_NUBUS0   0x0001
#define OSS_IP_NUBUS1   0x0002
#define OSS_IP_NUBUS2   0x0004
#define OSS_IP_NUBUS3   0x0008
#define OSS_IP_NUBUS4   0x0010
#define OSS_IP_NUBUS5   0x0020
#define OSS_IP_IOPISM   0x0040
#define OSS_IP_IOPSCC   0x0080
#define OSS_IP_SOUND    0x0100
#define OSS_IP_SCSI     0x0200
#define OSS_IP_60HZ     0x0400
#define OSS_IP_VIA1     0x0800
#define OSS_IP_UNUSED1  0x1000
#define OSS_IP_UNUSED2  0x2000
#define OSS_IP_PARITY   0x4000
#define OSS_IP_UNUSED3  0x8000

#define OSS_IP_NUBUS (OSS_IP_NUBUS0|OSS_IP_NUBUS1|OSS_IP_NUBUS2|OSS_IP_NUBUS3|OSS_IP_NUBUS4|OSS_IP_NUBUS5)

/*
 * Rom Control Register
 */

#define OSS_POWEROFF    0x80

/*
 * OSS Interrupt levels for various sub-systems
 *
 * This mapping is layed out with two things in mind: first, we try to keep
 * things on their own levels to avoid having to do double-dispatches. Second,
 * the levels match as closely as possible the alternate IRQ mapping mode (aka
 * "A/UX mode") available on some VIA machines.
 */

#define OSS_IRQLEV_DISABLED   0
#define OSS_IRQLEV_IOPISM     1     /* ADB? */
#define OSS_IRQLEV_SCSI       IRQ_AUTO_2
#define OSS_IRQLEV_NUBUS      IRQ_AUTO_3  /* keep this on its own level */
#define OSS_IRQLEV_IOPSCC     IRQ_AUTO_4  /* matches VIA alternate mapping */
#define OSS_IRQLEV_SOUND      IRQ_AUTO_5  /* matches VIA alternate mapping */
#define OSS_IRQLEV_60HZ       6     /* matches VIA alternate mapping */
#define OSS_IRQLEV_VIA1       IRQ_AUTO_6  /* matches VIA alternate mapping */
#define OSS_IRQLEV_PARITY     7     /* matches VIA alternate mapping */

#ifndef __ASSEMBLY__

00082 struct mac_oss {
    __u8  irq_level[0x10];    /* [0x000-0x00f] Interrupt levels */
    __u8  padding0[0x1F2];    /* [0x010-0x201] IO space filler */
    __u16 irq_pending;        /* [0x202-0x203] pending interrupts bits */
    __u8  rom_ctrl;           /* [0x204-0x204] ROM cntl reg (for poweroff) */
    __u8  padding1[0x2];      /* [0x205-0x206] currently unused by A/UX */
    __u8  ack_60hz;           /* [0x207-0x207] 60 Hz ack. */
};

extern volatile struct mac_oss *oss;
extern int oss_present;

#endif /* __ASSEMBLY__ */

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