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 7.2 (Berkeley) 10/23/87 7 */ 8 9 /* 10 * UDA50 registers and structures 11 */ 12 13 /* 14 * Writing any value to udaip starts initialisation. Reading from it 15 * when the UDA is running makes the UDA look through the command ring 16 * to find any new commands. Reading udasa gives status; writing it 17 * during initialisation sets things up. 18 */ 19 struct udadevice { 20 u_short udaip; /* initialisation and polling */ 21 u_short udasa; /* status and address */ 22 }; 23 24 /* 25 * Bits in UDA status register during initialisation 26 */ 27 #define UDA_ERR 0x8000 /* error */ 28 #define UDA_STEP4 0x4000 /* step 4 has started */ 29 #define UDA_STEP3 0x2000 /* step 3 has started */ 30 #define UDA_STEP2 0x1000 /* step 2 has started */ 31 #define UDA_STEP1 0x0800 /* step 1 has started */ 32 #define UDA_NV 0x0400 /* no host settable interrupt vector */ 33 #define UDA_QB 0x0200 /* controller supports Q22 bus */ 34 #define UDA_DI 0x0100 /* controller implements diagnostics */ 35 #define UDA_IE 0x0080 /* interrupt enable */ 36 #define UDA_NCNRMASK 0x003f /* in STEP1, bits 0-2=NCMDL2, 3-5=NRSPL2 */ 37 #define UDA_IVECMASK 0x007f /* in STEP2, bits 0-6 are interruptvec / 4 */ 38 #define UDA_PI 0x0001 /* host requests adapter purge interrupts */ 39 40 /* 41 * Bits in UDA status register after initialisation 42 */ 43 #define UDA_GO 0x0001 /* run */ 44 45 #define UDASR_BITS \ 46 "\20\20ERR\17STEP4\16STEP3\15STEP2\14STEP1\13NV\12QB\11DI\10IE\1GO" 47 48 /* 49 * UDA Communications Area. Note that this structure definition 50 * requires NRSP and NCMD to be defined already. 51 */ 52 struct udaca { 53 short ca_xxx1; /* unused */ 54 char ca_xxx2; /* unused */ 55 char ca_bdp; /* BDP to purge */ 56 short ca_cmdint; /* command ring transition flag */ 57 short ca_rspint; /* response ring transition flag */ 58 long ca_rspdsc[NRSP];/* response descriptors */ 59 long ca_cmddsc[NCMD];/* command descriptors */ 60 }; 61 62 /* 63 * Simplified routines (e.g., uddump) reprogram the UDA50 for one command 64 * and one response at a time; uda1ca is like udaca except that it provides 65 * exactly one command and response descriptor. 66 */ 67 struct uda1ca { 68 short ca_xxx1; 69 char ca_xxx2; 70 char ca_bdp; 71 short ca_cmdint; 72 short ca_rspint; 73 long ca_rspdsc; 74 long ca_cmddsc; 75 }; 76