sys/vaxif/if_cssreg.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)if_cssreg.h 7.2 (Berkeley) 8/4/88
 */

/*
 * DEC/CSS IMP11-A ARPAnet interface
 */

struct cssdma {
        short   wc;             /* word count */
        u_short ba;             /* bus address (low 16 bits) */
        short   csr;            /* status register */
        short   db;             /* data buffer*/
};

struct cssdevice {
        struct  cssdma  css_output;     /* transmit DR11-B */
        struct  cssdma  css_hole;       /* unclever gap */
        struct  cssdma  css_input;      /* receive DR11-B */
};

#define css_icsr        css_input.csr
#define css_iba         css_input.ba
#define css_iwc         css_input.wc
#define css_ocsr        css_output.csr
#define css_oba         css_output.ba
#define css_owc         css_output.wc

/*
 * Bits Common to both input and out CSR's
 */
#define CSS_ERR         0x8000          /* error present */
#define CSS_NXM         0x4000          /* non-existant memory */
#define CSS_ATTN        0x2000          /* attention */
#define CSS_MAINT       0x1000          /* maintenance mode */
#define CSS_CYCLE       0x0100          /* force bus cycle */
#define CSS_RDY         0x0080          /* ready */
#define CSS_IE          0x0040          /* interrupt enable */
#define CSS_XA          0x0030          /* extended address bits */
#define CSS_CLR         0x0020          /* clear status (reset) */
#define CSS_GO          0x0001          /* start operation */

/*
 * Input Control Status Register
 */
#define IN_EOM          0x0800          /* end-of-message recieved */
#define IN_IMPNR        0x0400          /* IMP not ready */
#define IN_RLE          0x0200          /* ready line error */
#define IN_WEN          0x0008          /* write enable */
#define IN_HRDY         0x0004          /* host ready */

#define CSS_INBITS \
"\20\20ERR\17NXM\16ATTN\15MAINT\14EOM\13IMPNR\12RLE\11CYCLE\10RDY\7IE\6XBA17\5XBA16\4WE\3HRDY\2CLR\1GO"


/*
 * Output Control Status Register
 */
#define OUT_TXEC        0x0008          /* tx error clear */
#define OUT_ENLB        0x0004          /* enable last bit */

#define CSS_OUTBITS \
"\20\20ERR\17NXM\16ATTN\15MAINT\11CYCLE\10RDY\7IE\6XBA17\5XBA16\4TXEC\3ENLB\2CLR\1GO"