Date: Thu, 29 Oct 1998 10:12:23 -0800 (PST) From: parag@codegen.com To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: bin/8486: doscmd port.c change to access real device ports Message-ID: <199810291812.KAA24349@pinhead.parag.codegen.com>
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>Number: 8486
>Category: bin
>Synopsis: doscmd port.c change to access real device ports
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Thu Oct 29 10:20:00 PST 1998
>Last-Modified:
>Originator: Parag Patel
>Organization:
CodeGen, Inc.
>Release: FreeBSD 3.0-CURRENT i386
>Environment:
Dual SMP Pentium-II/300, 256Mb RAM, 2 IBM 4Gb SCSI disks
(not that it matters)
>Description:
doscmd does not currently allow access to the physical device
ports on the system. The relevant code in port.c has not been
ported to FreeBSD. As I need it to access a Needhams EMP-10
EPROM programmer, I added the relevant code.
>How-To-Repeat:
This command allows access to the physical parallel port from
doscmd using the patch below:
rtprio 10 doscmd -x -b -i0x378:8 -o0x378:8
>Fix:
I had posted a similar patch to current@freebsd.org that had a
bug in it. In the original patch, iounmap() did not set the
ioperm back to zero. This patch fixes that problem.
Index: port.c
===================================================================
RCS file: /src/freebsd/src/usr.bin/doscmd/port.c,v
retrieving revision 1.1
diff -c -r1.1 port.c
*** port.c 1997/08/09 01:42:54 1.1
--- port.c 1998/10/29 17:56:15
***************
*** 59,73 ****
static void
iomap(int port, int cnt)
{
! fatal("iomap not supported");
}
static void
iounmap(int port, int cnt)
{
! fatal("iomap not supported");
}
-
#else
static void
iomap(int port, int cnt)
--- 59,88 ----
static void
iomap(int port, int cnt)
{
! if (port + cnt >= MAXPORT) {
! errno = ERANGE;
! goto bad;
! }
! if (i386_set_ioperm(port, cnt, 1) < 0) {
! bad:
! perror("iomap");
! quit(1);
! }
}
static void
iounmap(int port, int cnt)
{
! if (port + cnt >= MAXPORT) {
! errno = ERANGE;
! goto bad;
! }
! if (i386_set_ioperm(port, cnt, 0) < 0) {
! bad:
! perror("iounmap");
! quit(1);
! }
}
#else
static void
iomap(int port, int cnt)
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