228 lines
8.6 KiB
C
228 lines
8.6 KiB
C
/* ncr810Script.h - NCR 810 Script definition header */
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/* Copyright 1984-1994 Wind River Systems, Inc. */
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/*
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modification history
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--------------------
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01c,28jan99,dat Fixed HTH timeout, part of SPR 22597
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01b,21nov96,dds Added compiler directives to turn optmization off when
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compiling the ncr810Shared data structure.
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01a,25may95,jds Created script and driver header; adapted from ncr710 driver
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*/
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#ifndef __INCncr810Scripth
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#define __INCncr810Scripth
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef _ASMLANGUAGE
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#ifndef NCR_COMPILE
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/*
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* Entry points defined by PROCs in the script.
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*/
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extern ULONG ncr810Wait[]; /* wait for re-select or host cmd */
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extern ULONG ncr810InitStart[]; /* start new initiator thread */
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extern ULONG ncr810InitContinue[]; /* continue an initiator thread */
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extern ULONG ncr810TgtDisconnect[]; /* disconnect from SCSI bus */
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#if CPU_FAMILY==I960
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#pragma align 1 /* tell gcc960 not to optimize alignments */
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#endif /* CPU_FAMILY==I960 */
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/*
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* Structure giving parameters for block moves using the NCR 810's
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* indirect addressing ("MOVE FROM") capability.
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*/
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typedef struct moveParams
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{
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ULONG size; /* # bytes to move to/from SCSI */
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UINT8 *addr; /* where in memory they go/come */
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} MOVE_PARAMS;
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/*
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* Shared structure defining all information about a SCSI nexus which has
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* to be visible to the script. Note that this structure must not be
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* changed without corresponding changes to the OFFSET_* definitions below.
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*
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* IMPORTANT NOTE: Every element in this structure _must_ be aligned on
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* a 4-byte boundary, otherwise the script will fail (illegal instruction).
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*/
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typedef struct ncr810Shared
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{
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ULONG device; /* target bus ID, sync xfer params */
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MOVE_PARAMS command; /* command bytes sent to target */
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MOVE_PARAMS data; /* data bytes to/from target */
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MOVE_PARAMS status; /* command status byte from target */
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MOVE_PARAMS identOut; /* outgoing identification msg */
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MOVE_PARAMS identIn; /* incoming identification msg */
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MOVE_PARAMS msgOut; /* message bytes sent to target */
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MOVE_PARAMS msgIn; /* message bytes recvd from target */
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MOVE_PARAMS msgInSecond; /* second byte of multi-byte msg */
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MOVE_PARAMS msgInRest; /* remainder of multi-byte message */
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} NCR810_SHARED;
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#if CPU_FAMILY==I960
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#pragma align 0 /* tell gcc960 not to optimize alignments */
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#endif /* CPU_FAMILY==I960 */
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#endif /* NCR_COMPILE */
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/*
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* The following offsets are used in the script. They _MUST_ be kept in
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* sync with the definition of the NCR810_NEXUS structure above.
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*/
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#define SIZEOF_ULONG 4
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#define SIZEOF_MOVE_PARAMS 8
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#define OFFSET_DEVICE 0
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#define OFFSET_CMD (OFFSET_DEVICE + SIZEOF_ULONG)
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#define OFFSET_DATA (OFFSET_CMD + SIZEOF_MOVE_PARAMS)
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#define OFFSET_STATUS (OFFSET_DATA + SIZEOF_MOVE_PARAMS)
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#define OFFSET_IDENT_OUT (OFFSET_STATUS + SIZEOF_MOVE_PARAMS)
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#define OFFSET_IDENT_IN (OFFSET_IDENT_OUT + SIZEOF_MOVE_PARAMS)
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#define OFFSET_MSG_OUT (OFFSET_IDENT_IN + SIZEOF_MOVE_PARAMS)
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#define OFFSET_MSG_IN (OFFSET_MSG_OUT + SIZEOF_MOVE_PARAMS)
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#define OFFSET_MSG_IN_SECOND (OFFSET_MSG_IN + SIZEOF_MOVE_PARAMS)
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#define OFFSET_MSG_IN_REST (OFFSET_MSG_IN_SECOND + SIZEOF_MOVE_PARAMS)
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/*
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* Scratch registers used for data transfer to host
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*
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*/
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#define HOST_FLAGS scratcha0 /* host <-> SIOP: flags - see below */
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#define MSG_OUT_STATE scratcha1 /* host <-> SIOP: pending,sent,none */
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#define MSG_IN_STATE scratcha2 /* host <-> SIOP: pending,sent,none */
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#define TARGET_BUS_ID scratcha3 /* host <- SIOP: bus IDs asserted */
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#define CURRENT_PHASE scratcha3 /* host <- SIOP: phase in progress */
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/* Bitmasks for HOST_FLAGS */
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#define FLAGS_IDENTIFY 0x01 /* assert ATN on select, to IDENTIFY */
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/*
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* These definitions provide meaningful aliases for use in "ncr810Lib.c".
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* I don't like #defining names of structure members, but it's better than
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* having "scratch0" and so forth all over the place ... Be careful of
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* clashes with ordinary variable names.
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*/
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#define nHostFlags scratcha0 /* (r/w) flag bits as defined above */
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#define nMsgOutState scratcha1 /* (r/w) state of message out buffer */
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#define nMsgInState scratcha2 /* (r/w) state of message in buffer */
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#define nBusIdBits scratcha3 /* (r-o) bus ID bits set on reselect */
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#define nBusPhase scratcha3 /* (r-o) most recent phase; mismatch */
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/*
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* SCSI phases - defined here to avoid including "scsiLib.h". Must match !
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*/
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#define PHASE_NONE 0xff /* no info transfer pending */
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#define PHASE_DATA_OUT 0 /* data out (to target) */
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#define PHASE_DATA_IN 1 /* data in (from target) */
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#define PHASE_COMMAND 2 /* command (to target) */
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#define PHASE_STATUS 3 /* status (from target) */
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#define PHASE_MSG_OUT 6 /* message out (to target) */
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#define PHASE_MSG_IN 7 /* message in (from target) */
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/*
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* SCSI messages - defined here to avoid including "scsiLib.h". Must match !
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*/
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#define M_CMD_COMPLETE 0x00 /* command complete msg. */
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#define M_EXT_MSG 0x01 /* extended message msg. */
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#define M_DISCONNECT 0x04 /* disconnect msg. */
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#define M_ABORT 0x06 /* abort msg. */
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#define M_NO_OP 0x08 /* no operation msg. */
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#define M_ABORT_TAG 0x0d /* abort tag msg. */
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/*
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* SCSI message in status - must match SCSI_MSG_IN_STATE enum in "scsiLib.h"
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*/
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#define M_IN_NONE 0 /* no message in in progress */
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#define M_IN_SECOND_BYTE 1 /* next byte is second of two */
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#define M_IN_EXT_MSG_LEN 2 /* next byte is ext msg length */
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#define M_IN_EXT_MSG_DATA 3 /* next byte(s) are ext msg data */
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/*
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* SCSI message out status - must match SCSI_MSG_OUT_STATE enum in "scsiLib.h"
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*/
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#define M_OUT_NONE 0 /* no message out in progress */
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#define M_OUT_PENDING 1 /* message out ready to send */
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#define M_OUT_SENT 2 /* message out has been sent */
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/*
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* Script status interrupt codes
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*/
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#define NCR810_READY 0 /* ready to start new host command */
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#define NCR810_SCRIPT_ABORTED 1 /* have aborted a running script */
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#define NCR810_MESSAGE_OUT_SENT 10 /* have successfully sent a message */
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#define NCR810_MESSAGE_IN_RECVD 11 /* have received a complete message */
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#define NCR810_EXT_MESSAGE_SIZE 12 /* have read size of extended msg */
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#define NCR810_NO_MSG_OUT 13 /* msg out req. with no msg pending */
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#define NCR810_CMD_COMPLETE 20 /* SCSI command completed */
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#define NCR810_DISCONNECTED 21 /* target has disconnected */
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#define NCR810_RESELECTED 22 /* have been reselected by target */
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#define NCR810_SELECTED 23 /* have been selected as a target */
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#define NCR810_SPURIOUS_CMD 30 /* spurious interrupt of resel wait */
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#define NCR810_ILLEGAL_PHASE 31 /* target requested phase 4 or 5 */
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#define NCR810_NO_IDENTIFY 32 /* no IDENTIFY after reselection */
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/*
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* Note: the following are not generated by the script, but it seems
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* sensible to define them here for continuity.
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*/
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#define NCR810_PHASE_MISMATCH 50 /* unexpected phase change occurred */
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#define NCR810_SCSI_TIMEOUT 51 /* select, reselect or xfer timeout */
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#define NCR810_HANDSHAKE_TIMEOUT 54 /* handshake timeout */
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#define NCR810_SCSI_BUS_RESET 52 /* SCSI bus has been reset */
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#define NCR810_UNEXPECTED_DISCON 53 /* target disconnected unexpectedly */
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#define NCR810_SINGLE_STEP 60 /* single-step completed */
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#define NCR810_FATAL_ERROR 99 /* bus error, illegal opcode, etc. */
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/*
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* NCR 810 register bit definitions
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*
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* Note: there are similar definitions in "ncr810.h".
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*/
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#define SBCL_SEL 0x10 /* 1 => SCSI SEL signal asserted */
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#define SBCL_ATN 0x08 /* 1 => SCSI ATN signal asserted */
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#define SCNTL0_TARGET_MODE 0x01 /* 1 => SIOP is in target mode */
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#define SCNTL1_CONNECTED 0x10 /* 1 => SIOP is connected to SCSI */
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#define SIEN0_MISMATCH_ATN 0x80 /* 1 => mismatch/ATN intr enabled */
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#define CTEST2_SIGNAL 0x40 /* 1 => signal pending from host */
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#define STIME0_HTH_MASK 0xf0 /* Handshake-to-handshake timeout mask*/
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#define STIME0_SEL_MASK 0x0f /* Select timeout bit-mask */
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#define STIME0_HTH_TIMEOUT 0xd0 /* Handshake-to-handshake timeout valu*/
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#define STIME0_SEL_TIMEOUT 0x0d /* Select timeout value */
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#endif /* _ASMLANGUAGE */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCncr810Scripth */
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