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Annotation of researchv9/sys.vax/h/nexus.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Information about nexus's.
                      3:  *
                      4:  * Each machine has an address of backplane slots (nexi).
                      5:  * Each nexus is some type of adapter, whose code is the low
                      6:  * byte of the first word of the adapter address space.
                      7:  * At boot time the system looks through the array of available
                      8:  * slots and finds the interconnects for the machine.
                      9:  *
                     10:  * We stretch this a little for MicroVAX-II. It has a local register
                     11:  * space for the toy, q-bus map registers and other goodies. Because
                     12:  * these things are similar in concept to adapters we use this space 
                     13:  * to map them in also.
                     14:  */
                     15: #if VAX780
                     16: #define        NNEX780 16
                     17: #define        NEX780  ((struct nexus *)0x20000000)
                     18: #endif
                     19: #if VAX750
                     20: #define        NNEX750 16
                     21: #define        NEX750  ((struct nexus *)0xf20000)
                     22: #endif
                     23: #if VAX7ZZ
                     24: #define        NNEX7ZZ 16
                     25: #define        NEX7ZZ  ((struct nexus *)0xf20000)
                     26: #endif
                     27: #ifdef MVAX
                     28: #define        NNEXMVAX        1
                     29: #define NEXMVAX                ((struct nexus *)0x20080000)
                     30: #endif
                     31: 
                     32: #define        MAXNNEXUS 16
                     33: 
                     34: #if defined(VAX780) || defined(VAX750) || defined(VAX7ZZ)
                     35: #define        NEXSIZE 0x2000
                     36: #else
                     37: #define NEXSIZE        0x40000
                     38: #endif
                     39: 
                     40: #ifndef LOCORE
                     41: struct nexus {
                     42:        union nexcsr {
                     43:                long    nex_csr;
                     44:                u_char  nex_type;
                     45:        } nexcsr;
                     46:        long    nex_pad[NEXSIZE / sizeof (long) - 1];
                     47: };
                     48: #ifdef KERNEL
                     49: struct nexus nexus[MAXNNEXUS];
                     50: #endif
                     51: #endif
                     52: 
                     53: /*
                     54:  * Bits in high word of nexus's.
                     55:  */
                     56: #define        SBI_PARFLT      (1<<31)         /* sbi parity fault */
                     57: #define        SBI_WSQFLT      (1<<30)         /* write sequence fault */
                     58: #define        SBI_URDFLT      (1<<29)         /* unexpected read data fault */
                     59: #define        SBI_ISQFLT      (1<<28)         /* interlock sequence fault */
                     60: #define        SBI_MXTFLT      (1<<27)         /* multiple transmitter fault */
                     61: #define        SBI_XMTFLT      (1<<26)         /* transmit fault */
                     62: 
                     63: #define        NEX_CFGFLT      (0xfc000000)
                     64: 
                     65: #ifndef LOCORE
                     66: #if VAX780
                     67: #define        NEXFLT_BITS \
                     68: "\20\40PARFLT\37WSQFLT\36URDFLT\35ISQFLT\34MXTFLT\33XMTFLT"
                     69: #endif
                     70: #endif
                     71: 
                     72: #define        NEX_APD         (1<<23)         /* adaptor power down */
                     73: #define        NEX_APU         (1<<22)         /* adaptor power up */
                     74: 
                     75: #define        MBA_OT          (1<<21)         /* overtemperature */
                     76: 
                     77: #define        UBA_UBINIT      (1<<18)         /* unibus init */
                     78: #define        UBA_UBPDN       (1<<17)         /* unibus power down */
                     79: #define        UBA_UBIC        (1<<16)         /* unibus initialization complete */
                     80: 
                     81: /*
                     82:  * Types for nex_type.
                     83:  */
                     84: #define        NEX_ANY         0               /* pseudo for handling 11/750 */
                     85: #define        NEX_MEM4        0x08            /* 4K chips, non-interleaved mem */
                     86: #define        NEX_MEM4I       0x09            /* 4K chips, interleaved mem */
                     87: #define        NEX_MEM16       0x10            /* 16K chips, non-interleaved mem */
                     88: #define        NEX_MEM16I      0x11            /* 16K chips, interleaved mem */
                     89: #define        NEX_MBA         0x20            /* Massbus adaptor */
                     90: #define        NEX_UBA0        0x28            /* Unibus adaptor */
                     91: #define        NEX_UBA1        0x29            /* 4 flavours for 4 addr spaces */
                     92: #define        NEX_UBA2        0x2a
                     93: #define        NEX_UBA3        0x2b
                     94: #define        NEX_DR32        0x30            /* DR32 user i'face to SBI */
                     95: #define        NEX_MPM0        0x40            /* Multi-port mem */
                     96: #define        NEX_MPM1        0x41            /* Who knows why 4 different ones ? */
                     97: #define        NEX_MPM2        0x42
                     98: #define        NEX_MPM3        0x43
                     99: #define NEX_Q22                0xfd            /* Fudge an adapter type for MicroVAX */

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