1 /* nexus.h 4.10 81/04/03 */ 2 3 /* 4 * Information about nexus's. 5 * 6 * Each machine has an address of backplane slots (nexi). 7 * Each nexus is some type of adapter, whose code is the low 8 * byte of the first word of the adapter address space. 9 * At boot time the system looks through the array of available 10 * slots and finds the interconnects for the machine. 11 */ 12 #if VAX780 13 #define NNEX780 16 14 #define NEX780 ((struct nexus *)0x20000000) 15 #endif 16 #if VAX750 17 #define NNEX750 16 18 #define NEX750 ((struct nexus *)0xf20000) 19 #endif 20 #if VAX7ZZ 21 #define NNEX7ZZ 16 22 #define NEX7ZZ ((struct nexus *)0xf20000) 23 #endif 24 #define NEXSIZE 0x2000 25 26 #define MAXNNEXUS 16 27 28 #ifndef LOCORE 29 struct nexus { 30 union nexcsr { 31 long nex_csr; 32 u_char nex_type; 33 } nexcsr; 34 long nex_pad[NEXSIZE / sizeof (long) - 1]; 35 }; 36 #ifdef KERNEL 37 struct nexus nexus[MAXNNEXUS]; 38 #endif 39 #endif 40 41 /* 42 * Bits in high word of nexus's. 43 */ 44 #define SBI_PARFLT (1<<31) /* sbi parity fault */ 45 #define SBI_WSQFLT (1<<30) /* write sequence fault */ 46 #define SBI_URDFLT (1<<29) /* unexpected read data fault */ 47 #define SBI_ISQFLT (1<<28) /* interlock sequence fault */ 48 #define SBI_MXTFLT (1<<27) /* multiple transmitter fault */ 49 #define SBI_XMTFLT (1<<26) /* transmit fault */ 50 51 #define NEX_CFGFLT (0xfc000000) 52 53 #ifndef LOCORE 54 #if VAX780 55 #define NEXFLT_BITS \ 56 "\20\40PARFLT\37WSQFLT\36URDFLT\35ISQFLT\34MXTFLT\33XMTFLT" 57 #endif 58 #endif 59 60 #define NEX_APD (1<<23) /* adaptor power down */ 61 #define NEX_APU (1<<22) /* adaptor power up */ 62 63 #define MBA_OT (1<<21) /* overtemperature */ 64 65 #define UBA_UBINIT (1<<18) /* unibus init */ 66 #define UBA_UBPDN (1<<17) /* unibus power down */ 67 #define UBA_UBIC (1<<16) /* unibus initialization complete */ 68 69 /* 70 * Types for nex_type. 71 */ 72 #define NEX_ANY 0 /* pseudo for handling 11/750 */ 73 #define NEX_MEM4 0x08 /* 4K chips, non-interleaved mem */ 74 #define NEX_MEM4I 0x09 /* 4K chips, interleaved mem */ 75 #define NEX_MEM16 0x10 /* 16K chips, non-interleaved mem */ 76 #define NEX_MEM16I 0x11 /* 16K chips, interleaved mem */ 77 #define NEX_MBA 0x20 /* Massbus adaptor */ 78 #define NEX_UBA0 0x28 /* Unibus adaptor */ 79 #define NEX_UBA1 0x29 /* 4 flavours for 4 addr spaces */ 80 #define NEX_UBA2 0x2a 81 #define NEX_UBA3 0x2b 82 #define NEX_DR32 0x30 /* DR32 user i'face to SBI */ 83 #define NEX_MPM0 0x40 /* Multi-port mem */ 84 #define NEX_MPM1 0x41 /* Who knows why 4 different ones ? */ 85 #define NEX_MPM2 0x42 86 #define NEX_MPM3 0x43 87