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Annotation of cci/sys/vba/udc.h, revision 1.1

1.1     ! root        1: struct UDPAC {         /* UDC command packet */
        !             2:        char _stx  ;
        !             3:        char _pkid ;
        !             4:        char _pksiz ;   /* 21  bytes */
        !             5:        char _pkdev ;   /* device # */  
        !             6:        char _pkcmd ;   /* Command type */
        !             7:        char _pkfnc ;   /* Function type */
        !             8:        short _pkcnt ;  /* # of data blocks (1/4K each) */
        !             9:        short _pbsiz ;  /* Block length size (0x100 = 1/4K) */
        !            10:        short _pkmem[2] ;       /* Starting memory address.Should be 'long' but
        !            11:                                   we can't write it this way on Tahoe,
        !            12:                                   because of alignment problems - the C
        !            13:                                   will gap after the previous 'short' */
        !            14:        short _pcksm ;  /* Checksum (unused) */
        !            15:        long _psecno ;  /* Starting sector # */
        !            16:        char _etx ;
        !            17: } 
        !            18: ;
        !            19: 
        !            20: #define SECTSIZ 256            /* sector size */
        !            21: #define L2SIZ  8               /* log2 of sector size */
        !            22: #define L2BSIZ 10              /* log2 of block size */
        !            23: #define NUDC   1               /* number of UDC controllers */
        !            24: #define NUNIT  8               /* number of units per controller */
        !            25: #define NUDDRV 5               /* number of drive types supported */
        !            26: #define        DK_N    1               /* Monitoring device bit */
        !            27: 
        !            28: /*
        !            29: **     Block devices sizes structure
        !            30: */
        !            31: 
        !            32: struct size
        !            33: {
        !            34:        daddr_t nblocks;
        !            35:        int     block0;
        !            36: };
        !            37: 
        !            38: #define udaddr ( (char *)(0xff0000+IOBASE) )
        !            39: #define INT 0x00d              /* interrupt offset */
        !            40: #define RST 0x00f              /* controller reset offset */
        !            41: #define OB1 0x101
        !            42: #define OB2 0x103
        !            43: #define IB1 0x181
        !            44: #define IB2 0x183
        !            45: #define        PKID  0x187             /* packet id */
        !            46: #define        PKLEN 0x189             /* packet length */
        !            47: #define        PKDEV 0x18b             /* device # */
        !            48: #define        PKCMD 0x18d             /* command type */
        !            49: #define        PKSTT 0x18f             /* status type */
        !            50: #define STAT1 0x191            /* i/o status result offset */
        !            51: #define STAT2 0x193
        !            52: #define DEVSTAT1 0x195
        !            53: #define DEVSTAT2 0x197
        !            54: #define DEVSIZE 0x199          /* # of sectors in device status message */
        !            55: 
        !            56: #define UDREAD 0x10
        !            57: #define UDWTRY 0x01    /* read with retry */
        !            58: 
        !            59: #define UDWRITE 0x20
        !            60: #define UDWCRC  0x01   /* write sectors and check CRC */
        !            61: #define UDWSECT 0x02   /* write sectors */
        !            62: 
        !            63: #define UDTEST  0x30
        !            64: #define UDSTAT  0x02   /* Test status */
        !            65: 
        !            66: #define DEVRDY 0x80            /* device ready bit in status byte */
        !            67: #define        DEVTYPE 0x7             /* bits 0-2 in status byte define device */
        !            68: #define FLP 0x1
        !            69: #define HARDDISK 0x2
        !            70: #define TAPE   0x5
        !            71: 
        !            72: /*  Some I/O addresses used to generate pulses for scopes */
        !            73: #define        OUT1    0xffffb034
        !            74: #define        OUT2    0xffffb018
        !            75: #define        OUT3    0xffffb020
        !            76: #define        OUT4    0xffffb004
        !            77: #define        OUT5    0xffffb024
        !            78: #define        OUT6    0xffffb00c
        !            79: #define        OUT7    0xffffb02c
        !            80: 
        !            81: #define        IN1     0xffffb030
        !            82: #define        IN2     0xffffb03c
        !            83: #define        IN3     0xffffb004
        !            84: #define        IN4     0xffffb00c
        !            85: #define        IN5     0xffffb02c
        !            86: 
        !            87: int dummy;
        !            88: extern char vmem[][16*NBPG];
        !            89: 
        !            90: #define        IOaddr(off)     (char *)((int)vmem + ((off) & 0x0fffff))
        !            91: 
        !            92: int    iospace_mapped;
        !            93: #define        scope_out(x)    if(iospace_mapped) movob (0, IOaddr(OUT/**/x))
        !            94: #define        scope_in(x)     if(iospace_mapped) dummy =  *IOaddr(IN/**/x)

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