Rename min/max -> uimin/uimax for better honesty.
These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.
HOWEVER! Some subsystems have
#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))
even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.
To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.
I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:
cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))
It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.
Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)
2018-09-03 19:29:22 +03:00
|
|
|
/* $NetBSD: lpt_mvme.c,v 1.19 2018/09/03 16:29:32 riastradh Exp $ */
|
2002-02-12 23:38:43 +03:00
|
|
|
|
|
|
|
/*-
|
|
|
|
* Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
|
|
|
|
* All rights reserved.
|
|
|
|
*
|
|
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
|
|
* by Steve C. Woodford.
|
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
|
|
* ``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 FOUNDATION OR CONTRIBUTORS
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Copyright (c) 1993, 1994 Charles M. Hannum.
|
|
|
|
* Copyright (c) 1990 William F. Jolitz, TeleMuse
|
|
|
|
* 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:
|
2005-02-27 03:26:58 +03:00
|
|
|
* This software is a component of "386BSD" developed by
|
2002-02-12 23:38:43 +03:00
|
|
|
* William F. Jolitz, TeleMuse.
|
|
|
|
* 4. Neither the name of the developer nor the name "386BSD"
|
|
|
|
* may be used to endorse or promote products derived from this software
|
|
|
|
* without specific prior written permission.
|
|
|
|
*
|
2005-02-27 03:26:58 +03:00
|
|
|
* THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
|
|
|
|
* AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
|
|
|
|
* SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
|
|
|
|
* THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
|
2002-02-12 23:38:43 +03:00
|
|
|
* NOT MAKE USE OF THIS WORK.
|
|
|
|
*
|
|
|
|
* FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
|
2005-02-27 03:26:58 +03:00
|
|
|
* BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
|
|
|
|
* REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
|
|
|
|
* (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
|
|
|
|
* JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
|
|
|
|
* LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
|
|
|
|
* ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
|
2002-02-12 23:38:43 +03:00
|
|
|
* OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
|
|
|
|
*
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``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 DEVELOPER 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Device Driver for an MVME68K/MVME88K board's parallel printer port
|
|
|
|
* This driver attaches above the board-specific back-end.
|
|
|
|
*/
|
|
|
|
|
2003-07-14 19:47:00 +04:00
|
|
|
#include <sys/cdefs.h>
|
Rename min/max -> uimin/uimax for better honesty.
These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.
HOWEVER! Some subsystems have
#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))
even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.
To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.
I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:
cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))
It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.
Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)
2018-09-03 19:29:22 +03:00
|
|
|
__KERNEL_RCSID(0, "$NetBSD: lpt_mvme.c,v 1.19 2018/09/03 16:29:32 riastradh Exp $");
|
2003-07-14 19:47:00 +04:00
|
|
|
|
2002-02-12 23:38:43 +03:00
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/systm.h>
|
|
|
|
#include <sys/proc.h>
|
|
|
|
#include <sys/buf.h>
|
|
|
|
#include <sys/kernel.h>
|
|
|
|
#include <sys/ioctl.h>
|
|
|
|
#include <sys/uio.h>
|
|
|
|
#include <sys/device.h>
|
|
|
|
#include <sys/conf.h>
|
|
|
|
#include <sys/syslog.h>
|
|
|
|
|
2007-10-19 15:59:34 +04:00
|
|
|
#include <sys/cpu.h>
|
|
|
|
#include <sys/bus.h>
|
2002-02-12 23:38:43 +03:00
|
|
|
|
|
|
|
#include <dev/mvme/lptvar.h>
|
|
|
|
|
|
|
|
|
|
|
|
#define TIMEOUT hz*16 /* wait up to 16 seconds for a ready */
|
|
|
|
#define STEP hz/4
|
|
|
|
|
|
|
|
#define LPTPRI (PZERO+8)
|
|
|
|
#define LPT_BSIZE 1024
|
|
|
|
|
|
|
|
#if !defined(DEBUG) || !defined(notdef)
|
|
|
|
#define LPRINTF(a)
|
|
|
|
#else
|
2008-03-07 20:15:51 +03:00
|
|
|
#define LPRINTF if (lptdebug) aprint_verbose_dev a
|
2002-02-12 23:38:43 +03:00
|
|
|
int lptdebug = 1;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#define LPTUNIT(s) (minor(s) & 0x0f)
|
|
|
|
#define LPTFLAGS(s) (minor(s) & 0xf0)
|
|
|
|
|
2005-02-04 05:10:35 +03:00
|
|
|
static void lpt_wakeup(void *arg);
|
|
|
|
static int pushbytes(struct lpt_softc *);
|
2002-02-12 23:38:43 +03:00
|
|
|
|
|
|
|
extern struct cfdriver lpt_cd;
|
|
|
|
|
2002-09-06 17:18:43 +04:00
|
|
|
dev_type_open(lptopen);
|
|
|
|
dev_type_close(lptclose);
|
|
|
|
dev_type_write(lptwrite);
|
|
|
|
dev_type_ioctl(lptioctl);
|
|
|
|
|
|
|
|
const struct cdevsw lpt_cdevsw = {
|
2014-03-16 09:20:22 +04:00
|
|
|
.d_open = lptopen,
|
|
|
|
.d_close = lptclose,
|
|
|
|
.d_read = noread,
|
|
|
|
.d_write = lptwrite,
|
|
|
|
.d_ioctl = lptioctl,
|
|
|
|
.d_stop = nostop,
|
|
|
|
.d_tty = notty,
|
|
|
|
.d_poll = nopoll,
|
|
|
|
.d_mmap = nommap,
|
|
|
|
.d_kqfilter = nokqfilter,
|
2014-07-25 12:10:31 +04:00
|
|
|
.d_discard = nodiscard,
|
2014-03-16 09:20:22 +04:00
|
|
|
.d_flag = 0
|
2002-09-06 17:18:43 +04:00
|
|
|
};
|
2002-02-12 23:38:43 +03:00
|
|
|
|
|
|
|
void
|
2009-03-14 18:35:58 +03:00
|
|
|
lpt_attach_subr(struct lpt_softc *sc)
|
2002-02-12 23:38:43 +03:00
|
|
|
{
|
|
|
|
|
|
|
|
sc->sc_state = 0;
|
2007-07-10 00:51:58 +04:00
|
|
|
callout_init(&sc->sc_wakeup_ch, 0);
|
2002-02-12 23:38:43 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Reset the printer, then wait until it's selected and not busy.
|
|
|
|
*/
|
|
|
|
int
|
2008-06-13 02:44:47 +04:00
|
|
|
lptopen(dev_t dev, int flag, int mode, struct lwp *l)
|
2002-02-12 23:38:43 +03:00
|
|
|
{
|
|
|
|
u_char flags;
|
|
|
|
struct lpt_softc *sc;
|
|
|
|
int error;
|
|
|
|
int spin;
|
|
|
|
|
|
|
|
flags = LPTFLAGS(dev);
|
|
|
|
|
2008-06-13 02:44:47 +04:00
|
|
|
sc = device_lookup_private(&lpt_cd, LPTUNIT(dev));
|
2002-02-12 23:38:43 +03:00
|
|
|
if (!sc)
|
|
|
|
return (ENXIO);
|
|
|
|
|
|
|
|
#ifdef DIAGNOSTIC
|
|
|
|
if (sc->sc_state)
|
2008-03-07 20:15:51 +03:00
|
|
|
aprint_verbose_dev(sc->sc_dev, "stat=0x%x not zero\n",
|
2002-02-12 23:38:43 +03:00
|
|
|
sc->sc_state);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if (sc->sc_state)
|
|
|
|
return (EBUSY);
|
|
|
|
|
|
|
|
sc->sc_state = LPT_INIT;
|
|
|
|
sc->sc_flags = flags;
|
2008-03-07 20:15:51 +03:00
|
|
|
LPRINTF((sc->sc_dev, "open: flags=0x%x\n", flags));
|
2002-02-12 23:38:43 +03:00
|
|
|
|
|
|
|
if ((flags & LPT_NOPRIME) == 0) {
|
|
|
|
/* assert Input Prime for 100 usec to start up printer */
|
|
|
|
(sc->sc_funcs->lf_iprime) (sc);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* select fast or slow strobe depending on minor device number */
|
|
|
|
if (flags & LPT_FAST_STROBE)
|
|
|
|
(sc->sc_funcs->lf_speed) (sc, LPT_STROBE_FAST);
|
|
|
|
else
|
|
|
|
(sc->sc_funcs->lf_speed) (sc, LPT_STROBE_SLOW);
|
|
|
|
|
|
|
|
/* wait till ready (printer running diagnostics) */
|
|
|
|
for (spin = 0; (sc->sc_funcs->lf_notrdy) (sc, 1); spin += STEP) {
|
|
|
|
if (spin >= TIMEOUT) {
|
|
|
|
sc->sc_state = 0;
|
|
|
|
return (EBUSY);
|
|
|
|
}
|
|
|
|
/* wait 1/4 second, give up if we get a signal */
|
2007-03-04 08:59:00 +03:00
|
|
|
error = tsleep((void *) sc, LPTPRI | PCATCH, "lptopen", STEP);
|
2002-02-12 23:38:43 +03:00
|
|
|
if (error != EWOULDBLOCK) {
|
|
|
|
sc->sc_state = 0;
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
sc->sc_inbuf = geteblk(LPT_BSIZE);
|
|
|
|
sc->sc_count = 0;
|
|
|
|
sc->sc_state = LPT_OPEN;
|
|
|
|
|
|
|
|
if ((sc->sc_flags & LPT_NOINTR) == 0)
|
|
|
|
lpt_wakeup(sc);
|
|
|
|
|
|
|
|
(sc->sc_funcs->lf_open) (sc, sc->sc_flags & LPT_NOINTR);
|
|
|
|
|
2008-03-07 20:15:51 +03:00
|
|
|
LPRINTF((sc->sc_dev, "opened\n"));
|
2002-02-12 23:38:43 +03:00
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2009-03-14 18:35:58 +03:00
|
|
|
lpt_wakeup(void *arg)
|
2002-02-12 23:38:43 +03:00
|
|
|
{
|
|
|
|
struct lpt_softc *sc;
|
|
|
|
int s;
|
|
|
|
|
|
|
|
sc = arg;
|
|
|
|
|
|
|
|
s = spltty();
|
|
|
|
lpt_intr(sc);
|
|
|
|
splx(s);
|
|
|
|
|
|
|
|
callout_reset(&sc->sc_wakeup_ch, STEP, lpt_wakeup, sc);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Close the device, and free the local line buffer.
|
|
|
|
*/
|
|
|
|
int
|
2008-06-13 02:44:47 +04:00
|
|
|
lptclose(dev_t dev, int flag, int mode, struct lwp *l)
|
2002-02-12 23:38:43 +03:00
|
|
|
{
|
|
|
|
struct lpt_softc *sc;
|
|
|
|
|
2008-06-13 02:44:47 +04:00
|
|
|
sc = device_lookup_private(&lpt_cd, LPTUNIT(dev));
|
2002-02-12 23:38:43 +03:00
|
|
|
|
|
|
|
if (sc->sc_count)
|
|
|
|
(void) pushbytes(sc);
|
|
|
|
|
|
|
|
if ((sc->sc_flags & LPT_NOINTR) == 0)
|
|
|
|
callout_stop(&sc->sc_wakeup_ch);
|
|
|
|
|
|
|
|
(sc->sc_funcs->lf_close) (sc);
|
|
|
|
|
|
|
|
sc->sc_state = 0;
|
2007-10-09 00:12:05 +04:00
|
|
|
brelse(sc->sc_inbuf, 0);
|
2002-02-12 23:38:43 +03:00
|
|
|
|
2008-03-07 20:15:51 +03:00
|
|
|
LPRINTF((sc->sc_dev, "%s: closed\n"));
|
2002-02-12 23:38:43 +03:00
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
2009-03-14 18:35:58 +03:00
|
|
|
pushbytes(struct lpt_softc *sc)
|
2002-02-12 23:38:43 +03:00
|
|
|
{
|
|
|
|
int s, error, spin, tic;
|
|
|
|
|
|
|
|
if (sc->sc_flags & LPT_NOINTR) {
|
|
|
|
while (sc->sc_count > 0) {
|
|
|
|
spin = 0;
|
|
|
|
while ((sc->sc_funcs->lf_notrdy) (sc, 0)) {
|
|
|
|
if (++spin < sc->sc_spinmax)
|
|
|
|
continue;
|
|
|
|
tic = 0;
|
|
|
|
/* adapt busy-wait algorithm */
|
|
|
|
sc->sc_spinmax++;
|
|
|
|
while ((sc->sc_funcs->lf_notrdy) (sc, 1)) {
|
|
|
|
/* exponential backoff */
|
|
|
|
tic = tic + tic + 1;
|
|
|
|
if (tic > TIMEOUT)
|
|
|
|
tic = TIMEOUT;
|
2007-03-04 08:59:00 +03:00
|
|
|
error = tsleep((void *) sc,
|
2002-02-12 23:38:43 +03:00
|
|
|
LPTPRI | PCATCH, "lptpsh", tic);
|
|
|
|
if (error != EWOULDBLOCK)
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
(sc->sc_funcs->lf_wrdata) (sc, *sc->sc_cp++);
|
|
|
|
sc->sc_count--;
|
|
|
|
|
|
|
|
/* adapt busy-wait algorithm */
|
|
|
|
if (spin * 2 + 16 < sc->sc_spinmax)
|
|
|
|
sc->sc_spinmax--;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
while (sc->sc_count > 0) {
|
|
|
|
/* if the printer is ready for a char, give it one */
|
|
|
|
if ((sc->sc_state & LPT_OBUSY) == 0) {
|
2008-03-07 20:15:51 +03:00
|
|
|
LPRINTF((sc->sc_dev, "write %d\n",
|
2002-02-12 23:38:43 +03:00
|
|
|
sc->sc_count));
|
|
|
|
s = spltty();
|
|
|
|
(void) lpt_intr(sc);
|
|
|
|
splx(s);
|
|
|
|
}
|
2007-03-04 08:59:00 +03:00
|
|
|
error = tsleep((void *) sc, LPTPRI | PCATCH,
|
2002-02-12 23:38:43 +03:00
|
|
|
"lptwrite2", 0);
|
|
|
|
if (error)
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Copy a line from user space to a local buffer, then call putc to get the
|
|
|
|
* chars moved to the output queue.
|
|
|
|
*/
|
|
|
|
int
|
2008-06-13 02:44:47 +04:00
|
|
|
lptwrite(dev_t dev, struct uio *uio, int flags)
|
2002-02-12 23:38:43 +03:00
|
|
|
{
|
|
|
|
struct lpt_softc *sc;
|
|
|
|
size_t n;
|
|
|
|
int error;
|
|
|
|
|
2008-06-13 02:44:47 +04:00
|
|
|
sc = device_lookup_private(&lpt_cd, LPTUNIT(dev));
|
2002-02-12 23:38:43 +03:00
|
|
|
error = 0;
|
|
|
|
|
Rename min/max -> uimin/uimax for better honesty.
These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.
HOWEVER! Some subsystems have
#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))
even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.
To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.
I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:
cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))
It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.
Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)
2018-09-03 19:29:22 +03:00
|
|
|
while ((n = uimin(LPT_BSIZE, uio->uio_resid)) != 0) {
|
2002-02-12 23:38:43 +03:00
|
|
|
uiomove(sc->sc_cp = sc->sc_inbuf->b_data, n, uio);
|
|
|
|
sc->sc_count = n;
|
|
|
|
error = pushbytes(sc);
|
|
|
|
if (error) {
|
|
|
|
/*
|
|
|
|
* Return accurate residual if interrupted or timed
|
|
|
|
* out.
|
|
|
|
*/
|
|
|
|
uio->uio_resid += sc->sc_count;
|
|
|
|
sc->sc_count = 0;
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Handle printer interrupts which occur when the printer is ready to accept
|
|
|
|
* another char.
|
|
|
|
*/
|
|
|
|
int
|
2009-03-14 18:35:58 +03:00
|
|
|
lpt_intr(struct lpt_softc *sc)
|
2002-02-12 23:38:43 +03:00
|
|
|
{
|
|
|
|
|
|
|
|
if (sc->sc_count) {
|
|
|
|
/* send char */
|
|
|
|
(sc->sc_funcs->lf_wrdata) (sc, *sc->sc_cp++);
|
|
|
|
sc->sc_count--;
|
|
|
|
sc->sc_state |= LPT_OBUSY;
|
|
|
|
} else
|
|
|
|
sc->sc_state &= ~LPT_OBUSY;
|
|
|
|
|
|
|
|
if (sc->sc_count == 0) {
|
|
|
|
/* none, wake up the top half to get more */
|
2007-03-04 08:59:00 +03:00
|
|
|
wakeup((void *) sc);
|
2002-02-12 23:38:43 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
return (1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* ARGSUSED */
|
|
|
|
int
|
2009-03-14 18:35:58 +03:00
|
|
|
lptioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
|
2002-02-12 23:38:43 +03:00
|
|
|
{
|
|
|
|
|
|
|
|
return (ENODEV);
|
|
|
|
}
|