1 /* udareg.h 4.1 81/11/04 */ 2 3 /* 4 * UDA-50 registers and structures 5 */ 6 7 struct udadevice { 8 short udaip; /* initialization and polling */ 9 short udasa; /* status and address */ 10 }; 11 12 #define UDA_ERR 0100000 /* error bit */ 13 #define UDA_STEP4 0040000 /* step 4 has started */ 14 #define UDA_STEP3 0020000 /* step 3 has started */ 15 #define UDA_STEP2 0010000 /* step 2 has started */ 16 #define UDA_STEP1 0004000 /* step 1 has started */ 17 #define UDA_NV 0002000 /* no host settable interrupt vector */ 18 #define UDA_QB 0001000 /* controller supports Q22 bus */ 19 #define UDA_DI 0000400 /* controller implements diagnostics */ 20 #define UDA_IE 0000200 /* interrupt enable */ 21 #define UDA_PI 0000001 /* host requests adapter purge interrupts */ 22 #define UDA_GO 0000001 /* start operation, after init */ 23 24 25 /* 26 * UDA Communications Area 27 */ 28 29 struct udaca { 30 short ca_xxx1; /* unused */ 31 char ca_xxx2; /* unused */ 32 char ca_bdp; /* BDP to purge */ 33 short ca_cmdint; /* command queue transition interrupt flag */ 34 short ca_rspint; /* response queue transition interrupt flag */ 35 long ca_rspdsc[NRSP];/* response descriptors */ 36 long ca_cmddsc[NCMD];/* command descriptors */ 37 }; 38 39 #define ca_ringbase ca_rspdsc[0] 40 41 #define UDA_OWN 0x80000000 /* UDA owns this descriptor */ 42 #define UDA_INT 0x40000000 /* allow interrupt on ring transition */ 43 44 /* 45 * MSCP packet info 46 */ 47 struct mscp_header { 48 short uda_msglen; /* length of MSCP packet */ 49 char uda_credits; /* low 4 bits: credits, high 4 bits: msgtype */ 50 char uda_vcid; /* virtual circuit id */ 51 }; 52