95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
/*
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* OSS
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*
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* This is used in place of VIA2 on the IIfx.
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*/
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#define OSS_BASE (0x50f1a000)
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/*
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* Interrupt level offsets for mac_oss->irq_level
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*/
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#define OSS_NUBUS0 0
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#define OSS_NUBUS1 1
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#define OSS_NUBUS2 2
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#define OSS_NUBUS3 3
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#define OSS_NUBUS4 4
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#define OSS_NUBUS5 5
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#define OSS_IOPISM 6
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#define OSS_IOPSCC 7
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#define OSS_SOUND 8
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#define OSS_SCSI 9
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#define OSS_60HZ 10
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#define OSS_VIA1 11
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#define OSS_UNUSED1 12
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#define OSS_UNUSED2 13
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#define OSS_PARITY 14
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#define OSS_UNUSED3 15
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#define OSS_NUM_SOURCES 16
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/*
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* Pending interrupt bits in mac_oss->irq_pending
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*/
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#define OSS_IP_NUBUS0 0x0001
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#define OSS_IP_NUBUS1 0x0002
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#define OSS_IP_NUBUS2 0x0004
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#define OSS_IP_NUBUS3 0x0008
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#define OSS_IP_NUBUS4 0x0010
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#define OSS_IP_NUBUS5 0x0020
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#define OSS_IP_IOPISM 0x0040
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#define OSS_IP_IOPSCC 0x0080
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#define OSS_IP_SOUND 0x0100
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#define OSS_IP_SCSI 0x0200
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#define OSS_IP_60HZ 0x0400
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#define OSS_IP_VIA1 0x0800
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#define OSS_IP_UNUSED1 0x1000
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#define OSS_IP_UNUSED2 0x2000
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#define OSS_IP_PARITY 0x4000
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#define OSS_IP_UNUSED3 0x8000
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#define OSS_IP_NUBUS (OSS_IP_NUBUS0|OSS_IP_NUBUS1|OSS_IP_NUBUS2|OSS_IP_NUBUS3|OSS_IP_NUBUS4|OSS_IP_NUBUS5)
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/*
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* Rom Control Register
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*/
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#define OSS_POWEROFF 0x80
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/*
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* OSS Interrupt levels for various sub-systems
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*
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* This mapping is layed out with two things in mind: first, we try to keep
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* things on their own levels to avoid having to do double-dispatches. Second,
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* the levels match as closely as possible the alternate IRQ mapping mode (aka
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* "A/UX mode") available on some VIA machines.
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*/
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#define OSS_IRQLEV_DISABLED 0
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#define OSS_IRQLEV_IOPISM 1 /* ADB? */
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#define OSS_IRQLEV_SCSI IRQ_AUTO_2
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#define OSS_IRQLEV_NUBUS IRQ_AUTO_3 /* keep this on its own level */
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#define OSS_IRQLEV_IOPSCC IRQ_AUTO_4 /* matches VIA alternate mapping */
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#define OSS_IRQLEV_SOUND IRQ_AUTO_5 /* matches VIA alternate mapping */
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#define OSS_IRQLEV_60HZ 6 /* matches VIA alternate mapping */
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#define OSS_IRQLEV_VIA1 IRQ_AUTO_6 /* matches VIA alternate mapping */
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#define OSS_IRQLEV_PARITY 7 /* matches VIA alternate mapping */
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#ifndef __ASSEMBLY__
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struct mac_oss {
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__u8 irq_level[0x10]; /* [0x000-0x00f] Interrupt levels */
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__u8 padding0[0x1F2]; /* [0x010-0x201] IO space filler */
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__u16 irq_pending; /* [0x202-0x203] pending interrupts bits */
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__u8 rom_ctrl; /* [0x204-0x204] ROM cntl reg (for poweroff) */
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__u8 padding1[0x2]; /* [0x205-0x206] currently unused by A/UX */
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__u8 ack_60hz; /* [0x207-0x207] 60 Hz ack. */
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};
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extern volatile struct mac_oss *oss;
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extern int oss_present;
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#endif /* __ASSEMBLY__ */
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