1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)udareg.h 7.1 (Berkeley) 06/05/86 7 */ 8 9 /* 10 * UDA-50 registers and structures 11 */ 12 13 struct udadevice { 14 short udaip; /* initialization and polling */ 15 short udasa; /* status and address */ 16 }; 17 18 #define UDA_ERR 0100000 /* error bit */ 19 #define UDA_STEP4 0040000 /* step 4 has started */ 20 #define UDA_STEP3 0020000 /* step 3 has started */ 21 #define UDA_STEP2 0010000 /* step 2 has started */ 22 #define UDA_STEP1 0004000 /* step 1 has started */ 23 #define UDA_NV 0002000 /* no host settable interrupt vector */ 24 #define UDA_QB 0001000 /* controller supports Q22 bus */ 25 #define UDA_DI 0000400 /* controller implements diagnostics */ 26 #define UDA_IE 0000200 /* interrupt enable */ 27 #define UDA_PI 0000001 /* host requests adapter purge interrupts */ 28 #define UDA_GO 0000001 /* start operation, after init */ 29 30 31 /* 32 * UDA Communications Area 33 */ 34 35 struct udaca { 36 short ca_xxx1; /* unused */ 37 char ca_xxx2; /* unused */ 38 char ca_bdp; /* BDP to purge */ 39 short ca_cmdint; /* command queue transition interrupt flag */ 40 short ca_rspint; /* response queue transition interrupt flag */ 41 long ca_rspdsc[NRSP];/* response descriptors */ 42 long ca_cmddsc[NCMD];/* command descriptors */ 43 }; 44 45 #define ca_ringbase ca_rspdsc[0] 46 47 #define UDA_OWN 0x80000000 /* UDA owns this descriptor */ 48 #define UDA_INT 0x40000000 /* allow interrupt on ring transition */ 49 50 /* 51 * MSCP packet info 52 */ 53 struct mscp_header { 54 short uda_msglen; /* length of MSCP packet */ 55 char uda_credits; /* low 4 bits: credits, high 4 bits: msgtype */ 56 char uda_vcid; /* virtual circuit id */ 57 }; 58