93 lines
3.4 KiB
Groff
93 lines
3.4 KiB
Groff
.\"
|
|
.\" Copyright (c) 1994 Christian E. Hopps
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by Christian E. Hopps.
|
|
.\" 3. The name of the author may not be used to endorse or promote products
|
|
.\" derived from this software without specific prior written permission
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $Id: ahsc.4,v 1.1 1994/09/19 17:40:45 chopps Exp $
|
|
.\"
|
|
.Dd August 31, 1994
|
|
.Os NetBSD 1.0
|
|
.Dt AHSC 4 amiga
|
|
.Sh NAME
|
|
.Nm ahsc
|
|
.Nd A3000 low level SCSI interface
|
|
.Sh SYNOPSIS
|
|
.Cd "ahsc0 at mainbus0"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Tn Amiga
|
|
architecture uses a common machine independent scsi sub-system
|
|
provided in the kernel source. The machine independent
|
|
drivers that use this code access the hardware through a
|
|
common interface. (see
|
|
.Xr scsibus 4 )
|
|
This common interface interacts with a machine dependent interface,
|
|
such as
|
|
.Nm ahsc ,
|
|
which then handles the hardware specific issues.
|
|
.Pp
|
|
The
|
|
.Nm
|
|
interface handles things such as DMA and interrupts as well as
|
|
actually sending commands, negotiating synchronous or asynchronous
|
|
transfers and handling disconnect/reconnect of SCSI targets.
|
|
The hardware that
|
|
.Nm
|
|
uses is based on the WD33c93 SCSI chip.
|
|
.Sh DIAGNOSTICS
|
|
.Bl -diag
|
|
.It sbicwait TIMEO @%d with asr=x%x csr=x%x
|
|
The 33c93 code (sbic) has been waiting too long for a SCSI chip
|
|
operation to complete. %d is the line in the source file
|
|
.Pa amiga/dev/sbic.c
|
|
at which the SCSI chip timed-out. Asr and csr are status registers
|
|
withing the SCSI chip.
|
|
.It ahsc%d: abort %s: csr = 0x%02x, asr = 0x%02x
|
|
A SCSI operation %s was aborted due to an error.
|
|
.It ahsc%d: csr == 0x%02i
|
|
A error has occured within the SCSI chip code.
|
|
.It ahsc%d: unexpected phase %d in icmd from %d
|
|
The target described by
|
|
.Sq from %d
|
|
has taken the SCSI bus into a phase which is not
|
|
expected durring polled IO.
|
|
.It ahsc%d: unexpected phase %d in icmd from %d
|
|
The target described by
|
|
.Sq from %d
|
|
has taken the SCSI bus into a phase which is not
|
|
expected durring DMA IO setup.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr scsibus 4
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
interface first appeared in
|
|
.Nx 0.9a
|
|
.Sh BUGS
|
|
Doesn't handle disconnect/reconnect of SCSI targets.
|