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 laid 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 82 struct 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 91 extern volatile struct mac_oss *oss; 92 extern int oss_present; 93 94 #endif /* __ASSEMBLY__ */ 95