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Annotation of Gnu-Mach/chips/tca100.h, revision 1.1

1.1     ! root        1: /* 
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1992 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  * 
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  * 
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  * 
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  * 
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  * 
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: 
        !            27: #ifndef _TCA100_H_
        !            28: #define _TCA100_H_ 1
        !            29: 
        !            30: #ifndef STUB 
        !            31: #include <chips/nw.h>
        !            32: #else
        !            33: #include "nw.h"
        !            34: #endif
        !            35: 
        !            36: /*** FORE TCA-100 Turbochannel ATM computer interface ***/
        !            37: 
        !            38: /*** HARDWARE REGISTERS ***/
        !            39: 
        !            40: typedef volatile unsigned int vol_u_int;
        !            41: 
        !            42: typedef struct atm_device {
        !            43:   unsigned int prom[64 * 1024 / 4];
        !            44:   vol_u_int sreg;
        !            45:   vol_u_int creg_set;
        !            46:   vol_u_int creg_clr;
        !            47:   vol_u_int creg;
        !            48:   vol_u_int rxtimer;
        !            49:   unsigned int pad1;
        !            50:   vol_u_int rxtimerv;
        !            51:   unsigned int pad2;
        !            52:   vol_u_int rxcount;
        !            53:   unsigned int pad3;
        !            54:   vol_u_int rxthresh;
        !            55:   unsigned int pad4;
        !            56:   vol_u_int txcount;
        !            57:   unsigned int pad5;
        !            58:   vol_u_int txthresh;
        !            59:   unsigned int pad6[64*1024/4 - 15];
        !            60:   vol_u_int rxfifo[14];
        !            61:   unsigned int pad7[64*1024/4 - 14];
        !            62:   vol_u_int txfifo[14];
        !            63:   unsigned int pad8[64*1024/4 - 14];
        !            64: } atm_device_s, *atm_device_t;
        !            65: 
        !            66: 
        !            67: /*** DEFINITION OF BITS IN THE STATUS AND CONTROL REGISTERS ***/
        !            68: 
        !            69: #define RX_COUNT_INTR  0x0001
        !            70: #define RX_EOM_INTR    0x0002
        !            71: #define RX_TIME_INTR   0x0004
        !            72: #define TX_COUNT_INTR  0x0008
        !            73: #define RX_CELL_LOST   0x0010
        !            74: #define RX_NO_CARRIER  0x0020
        !            75: #define CR_RX_ENABLE   0x0040
        !            76: #define CR_TX_ENABLE   0x0080
        !            77: #define CR_RX_RESET    0x0100
        !            78: #define CR_TX_RESET    0x0200
        !            79: 
        !            80: #define RX_COUNTER_MASK 0x03ff
        !            81: 
        !            82: /*** DEFINITION OF FIELDS FOR AAL3/4 WITH THE TCA-100 PADDING ***/
        !            83: 
        !            84: /*Header -- ATM header*/
        !            85: 
        !            86: #define VPI 0x0ff00000
        !            87: #define VCI 0x000ffff0
        !            88: 
        !            89: #define ATM_HEADER_RSV_BITS 0x00000004
        !            90: 
        !            91: #define PERMANENT_VIRTUAL_CONNECTIONS 1
        !            92: 
        !            93: #if PERMANENT_VIRTUAL_CONNECTIONS
        !            94: #define ATM_VPVC_MASK 0x3ff00000
        !            95: #define ATM_VPVC_SHIFT 20
        !            96: #else
        !            97: #define ATM_VPVC_MASK 0x00003ff0
        !            98: #define ATM_VPVC_SHIFT 4
        !            99: #endif
        !           100: 
        !           101: 
        !           102: /*First payload word -- SAR header*/
        !           103: 
        !           104: #define ATM_HEADER_CRC 0xff000000
        !           105: #define ATM_HEADER_CRC_SYNDROME 0x00ff0000
        !           106: 
        !           107: #define SEG_TYPE 0x0000c000
        !           108: #define BOM 0x00008000
        !           109: #define COM 0x00000000
        !           110: #define EOM 0x00004000
        !           111: #define SSM 0x0000c000
        !           112: 
        !           113: #define BOM_DATA_SIZE 40
        !           114: #define COM_DATA_SIZE 44
        !           115: #define EOM_DATA_SIZE 40
        !           116: #define SSM_DATA_SIZE 36
        !           117: 
        !           118: #define SEQ_NO 0x00003c00
        !           119: #define SEQ_INC 0x00000400
        !           120: 
        !           121: #define MID 0x000003ff
        !           122: #define MID_INC 0x00000001
        !           123: 
        !           124: #define SAR_HEADER_MASK (ATM_HEADER_CRC_SYNDROME | SEG_TYPE | SEQ_NO | MID)
        !           125: 
        !           126: /*Trailer -- SAR trailer and error flags*/
        !           127: 
        !           128: #define PAYLOAD_LENGTH 0xfc000000
        !           129: #define FULL_SEGMENT_TRAILER (44 << 26)
        !           130: #define EMPTY_SEGMENT_TRAILER (4 << 26)
        !           131: #define SYNCH_SEGMENT_TRAILER (16 << 26)
        !           132: 
        !           133: #define FRAMING_ERROR 0x0001
        !           134: #define HEADER_CRC_ERROR 0x0002
        !           135: #define PAYLOAD_CRC_ERROR 0x0004
        !           136: #define PAD2_ERROR 0x0007
        !           137: 
        !           138: #define SAR_TRAILER_MASK (PAYLOAD_LENGTH | PAD2_ERROR)
        !           139:                     /*This field should be FULL_SEGMENT_TRAILER IN BOM OR COM*/
        !           140: 
        !           141: 
        !           142: /*CS header and trailer fields*/
        !           143: 
        !           144: #define CS_PDU_TYPE 0xff000000
        !           145: #define BE_TAG 0x00ff0000
        !           146: #define BA_SIZE 0x0000ffff
        !           147: 
        !           148: #define CS_PROTOCOL_CONTROL_FIELD 0xff000000
        !           149: #define CS_LENGTH 0x0000ffff
        !           150: 
        !           151: /*** DEVICE STATUS ***/
        !           152: 
        !           153: typedef enum {      /*"Flavors" for device_get_status and device_set_status*/
        !           154:   ATM_MAP_SIZE,     /* device_get_status options */
        !           155:   ATM_MTU_SIZE,
        !           156:   ATM_EVC_ID,       /* ID of event counter assigned to device */
        !           157:   ATM_ASSIGNMENT,   /* Returns two words indicating whether device is mapped
        !           158:                       and number of tasks with the device open */
        !           159:                     /* device_set_status options */
        !           160:   ATM_INITIALIZE,   /* Restarts hardware and low-level driver */
        !           161:   ATM_PVC_SET       /* Sets up a permanent virtual connection --
        !           162:                       the status argument array is cast to a nw_pvc_s 
        !           163:                        structure */
        !           164: 
        !           165: } atm_status;        
        !           166: 
        !           167: typedef struct {
        !           168:   nw_peer_s pvc;         /* Permanent virtual connection */
        !           169:   u_int tx_vp;           /* VPI used for transmissions to permanent virtual
        !           170:                             connection. The VPI used for reception is the
        !           171:                             local endpoint number. VCIs are 0 */
        !           172:   nw_protocol protocol;  /* Protocol of connection (possibly NW_LINE) */
        !           173: } nw_pvc_s, *nw_pvc_t;
        !           174: 
        !           175: /*** BYTE ORDER ***/
        !           176: 
        !           177: /*The ATM header and SAR header and trailer are converted to and from
        !           178:   host byte order by hardware. CS headers and trailers and
        !           179:   signaling messages need byte order conversion in software.
        !           180:   Conversion in software is also necessary for application messages
        !           181:   if the communicating hosts have different byte orders (e.g. DECstation
        !           182:   and SPARCstation). */
        !           183: 
        !           184: #define HTONL(x) \
        !           185:   ((x << 24) | ((x & 0xff00) << 8) | ((x >> 8) & 0xff00) | ((u_int) x >> 24))
        !           186: 
        !           187: #define NTOHL(x) HTONL(x)
        !           188: 
        !           189: #if 0
        !           190: unsigned int htonl(unsigned int x) {
        !           191: 
        !           192:   return ((x << 24) | ((x & 0xff00) << 8) | ((x >> 8) & 0xff00) | (x >> 24));
        !           193: }
        !           194: 
        !           195: #define ntohl(x) htonl(x)
        !           196: 
        !           197: #endif
        !           198: 
        !           199: #endif /* _TCA100_H_ */
        !           200: 

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