projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| e332bda6 BJ |
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 | }; |