123354Smckusick /* 2*29252Smckusick * Copyright (c) 1982, 1986 Regents of the University of California. 323354Smckusick * All rights reserved. The Berkeley software License Agreement 423354Smckusick * specifies the terms and conditions for redistribution. 523354Smckusick * 6*29252Smckusick * @(#)udareg.h 7.1 (Berkeley) 06/05/86 723354Smckusick */ 84741Swnj 94741Swnj /* 104741Swnj * UDA-50 registers and structures 114741Swnj */ 124741Swnj 134741Swnj struct udadevice { 144741Swnj short udaip; /* initialization and polling */ 154741Swnj short udasa; /* status and address */ 164741Swnj }; 174741Swnj 184741Swnj #define UDA_ERR 0100000 /* error bit */ 194741Swnj #define UDA_STEP4 0040000 /* step 4 has started */ 204741Swnj #define UDA_STEP3 0020000 /* step 3 has started */ 214741Swnj #define UDA_STEP2 0010000 /* step 2 has started */ 224741Swnj #define UDA_STEP1 0004000 /* step 1 has started */ 234741Swnj #define UDA_NV 0002000 /* no host settable interrupt vector */ 244741Swnj #define UDA_QB 0001000 /* controller supports Q22 bus */ 254741Swnj #define UDA_DI 0000400 /* controller implements diagnostics */ 264741Swnj #define UDA_IE 0000200 /* interrupt enable */ 274741Swnj #define UDA_PI 0000001 /* host requests adapter purge interrupts */ 284741Swnj #define UDA_GO 0000001 /* start operation, after init */ 294741Swnj 304741Swnj 314741Swnj /* 324741Swnj * UDA Communications Area 334741Swnj */ 344741Swnj 354741Swnj struct udaca { 364741Swnj short ca_xxx1; /* unused */ 374741Swnj char ca_xxx2; /* unused */ 384741Swnj char ca_bdp; /* BDP to purge */ 394741Swnj short ca_cmdint; /* command queue transition interrupt flag */ 404741Swnj short ca_rspint; /* response queue transition interrupt flag */ 414741Swnj long ca_rspdsc[NRSP];/* response descriptors */ 424741Swnj long ca_cmddsc[NCMD];/* command descriptors */ 434741Swnj }; 444741Swnj 454741Swnj #define ca_ringbase ca_rspdsc[0] 464741Swnj 474741Swnj #define UDA_OWN 0x80000000 /* UDA owns this descriptor */ 484741Swnj #define UDA_INT 0x40000000 /* allow interrupt on ring transition */ 494741Swnj 504741Swnj /* 514741Swnj * MSCP packet info 524741Swnj */ 534741Swnj struct mscp_header { 544741Swnj short uda_msglen; /* length of MSCP packet */ 554741Swnj char uda_credits; /* low 4 bits: credits, high 4 bits: msgtype */ 564741Swnj char uda_vcid; /* virtual circuit id */ 574741Swnj }; 58