03599baeb2
with the beep information it had (like ignoring it). Submitted by: sanpei@sanpei.org (MIHIRA-san Yoshiro) Add $FreeBSD$ to pccard_beep.c while I'm here.
780 lines
19 KiB
C
780 lines
19 KiB
C
/*
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* pccard.c - Interface code for PC-CARD controllers.
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*
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* June 1995, Andrew McRae (andrew@mega.com.au)
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*-------------------------------------------------------------------------
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*
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* Copyright (c) 1995 Andrew McRae. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "opt_pcic.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/select.h>
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#include <sys/sysctl.h>
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#include <sys/conf.h>
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#include <sys/module.h>
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#include <sys/uio.h>
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#include <sys/poll.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/icu.h>
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#include <i386/isa/intr_machdep.h>
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#include "apm.h"
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#if NAPM > 0
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#include <machine/apm_bios.h>
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#endif /* NAPM > 0 */
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#include <pccard/cardinfo.h>
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#include <pccard/driver.h>
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#include <pccard/pcic.h>
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#include <pccard/slot.h>
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#include <pccard/pccard_nbk.h>
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#include <machine/md_var.h>
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/*
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* XXX We shouldn't be using processor-specific/bus-specific code in
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* here, but we need the start of the ISA hole (IOM_BEGIN).
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*/
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#ifdef PC98
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#include <pc98/pc98/pc98.h>
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#else
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#include <i386/isa/isa.h>
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#endif
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SYSCTL_NODE(_machdep, OID_AUTO, pccard, CTLFLAG_RW, 0, "pccard");
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static int pcic_resume_reset =
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#ifdef PCIC_RESUME_RESET /* opt_pcic.h */
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1;
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#else
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0;
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#endif
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SYSCTL_INT(_machdep_pccard, OID_AUTO, pcic_resume_reset, CTLFLAG_RW,
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&pcic_resume_reset, 0, "");
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#define PCCARD_MEMSIZE (4*1024)
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#define MIN(a,b) ((a)<(b)?(a):(b))
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static int allocate_driver(struct slot *, struct dev_desc *);
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static void inserted(void *);
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static void disable_slot(struct slot *);
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static void disable_slot_spl0(struct slot *);
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static void disable_slot_to(void *);
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static int invalid_io_memory(unsigned long, int);
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static void power_off_slot(void *);
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#if NAPM > 0
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/*
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* For the APM stuff, the apmhook structure is kept
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* separate from the slot structure so that the slot
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* drivers do not need to know about the hooks (or the
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* data structures).
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*/
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static int slot_suspend(void *arg);
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static int slot_resume(void *arg);
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static struct apmhook s_hook[MAXSLOT]; /* APM suspend */
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static struct apmhook r_hook[MAXSLOT]; /* APM resume */
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#endif /* NAPM > 0 */
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static struct slot *pccard_slots[MAXSLOT]; /* slot entries */
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static struct slot *slot_list;
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static struct slot_ctrl *cont_list;
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/*
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* The driver interface for read/write uses a block
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* of memory in the ISA I/O memory space allocated via
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* an ioctl setting.
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*/
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static unsigned long pccard_mem; /* Physical memory */
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static unsigned char *pccard_kmem; /* Kernel virtual address */
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static d_open_t crdopen;
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static d_close_t crdclose;
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static d_read_t crdread;
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static d_write_t crdwrite;
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static d_ioctl_t crdioctl;
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static d_poll_t crdpoll;
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#define CDEV_MAJOR 50
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static struct cdevsw crd_cdevsw = {
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/* open */ crdopen,
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/* close */ crdclose,
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/* read */ crdread,
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/* write */ crdwrite,
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/* ioctl */ crdioctl,
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/* poll */ crdpoll,
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/* mmap */ nommap,
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/* strategy */ nostrategy,
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/* name */ "crd",
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/* maj */ CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ 0,
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/* bmaj */ -1
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};
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/*
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* Power off the slot.
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* (doing it immediately makes the removal of some cards unstable)
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*/
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static void
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power_off_slot(void *arg)
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{
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struct slot *slt = (struct slot *)arg;
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int s;
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/*
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* The following will generate an interrupt. So, to hold off
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* the interrupt unitl after disable runs so that we can get rid
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* rid of the interrupt before it becomes unsafe to touch the
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* device.
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*/
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s = splhigh();
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/* Power off the slot. */
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slt->pwr_off_pending = 0;
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slt->ctrl->disable(slt);
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splx(s);
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}
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/*
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* disable_slot - Disables the slot by removing
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* the power and unmapping the I/O
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*/
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static void
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disable_slot(struct slot *slt)
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{
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/* XXX Need to store pccarddev in slt. */
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device_t pccarddev;
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device_t *kids;
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int nkids;
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int i;
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int ret;
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/*
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* Note that a race condition is possible here; if a
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* driver is accessing the device and it is removed, then
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* all bets are off...
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*/
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pccarddev = devclass_get_device(pccard_devclass, slt->slotnum);
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device_get_children(pccarddev, &kids, &nkids);
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for (i = 0; i < nkids; i++) {
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if ((ret = device_delete_child(pccarddev, kids[i])) != 0)
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printf("pccard: delete failed: %d\n", ret);
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}
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/* Power off the slot 1/2 second after removal of the card */
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slt->poff_ch = timeout(power_off_slot, (caddr_t)slt, hz / 2);
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slt->pwr_off_pending = 1;
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}
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static void
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disable_slot_to(void *argp)
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{
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struct slot *slt = (struct slot *) argp;
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disable_slot(slt);
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slt->state = empty;
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printf("pccard: card removed, slot %d\n", slt->slotnum);
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pccard_remove_beep();
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selwakeup(&slt->selp);
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}
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/*
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* Disables the slot later when we drop to spl0 via a timeout.
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*/
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static void
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disable_slot_spl0(struct slot *slt)
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{
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slt->disable_ch = timeout(disable_slot_to, (caddr_t) slt, 0);
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}
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/*
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* APM hooks for suspending and resuming.
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*/
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#if NAPM > 0
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static int
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slot_suspend(void *arg)
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{
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struct slot *slt = arg;
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/* This code stolen from pccard_event:card_removed */
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if (slt->state == filled) {
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int s = splhigh();
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disable_slot(slt);
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slt->laststate = filled;
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slt->state = suspend;
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splx(s);
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printf("pccard: card disabled, slot %d\n", slt->slotnum);
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}
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/*
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* Disable any pending timeouts for this slot since we're
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* powering it down/disabling now.
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*/
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untimeout(power_off_slot, (caddr_t)slt, slt->disable_ch);
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untimeout(power_off_slot, (caddr_t)slt, slt->poff_ch);
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slt->ctrl->disable(slt);
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return (0);
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}
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static int
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slot_resume(void *arg)
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{
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struct slot *slt = arg;
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if (pcic_resume_reset)
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slt->ctrl->resume(slt);
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/* This code stolen from pccard_event:card_inserted */
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if (slt->state == suspend) {
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slt->laststate = suspend;
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slt->state = empty;
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slt->insert_seq = 1;
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untimeout(inserted, (void *)slt, slt->insert_ch);
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inserted((void *) slt);
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selwakeup(&slt->selp);
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}
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return (0);
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}
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#endif /* NAPM > 0 */
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/*
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* pccard_alloc_slot - Called from controller probe
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* routine, this function allocates a new PC-CARD slot
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* and initialises the data structures using the data provided.
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* It returns the allocated structure to the probe routine
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* to allow the controller specific data to be initialised.
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*/
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struct slot *
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pccard_alloc_slot(struct slot_ctrl *ctrl)
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{
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struct slot *slt;
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int slotno;
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for (slotno = 0; slotno < MAXSLOT; slotno++)
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if (pccard_slots[slotno] == 0)
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break;
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if (slotno == MAXSLOT)
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return(0);
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MALLOC(slt, struct slot *, sizeof(*slt), M_DEVBUF, M_WAITOK);
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bzero(slt, sizeof(*slt));
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make_dev(&crd_cdevsw, slotno, 0, 0, 0600, "card%d", slotno);
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if (ctrl->extra) {
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MALLOC(slt->cdata, void *, ctrl->extra, M_DEVBUF, M_WAITOK);
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bzero(slt->cdata, ctrl->extra);
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}
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slt->ctrl = ctrl;
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slt->slotnum = slotno;
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pccard_slots[slotno] = slt;
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slt->next = slot_list;
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slot_list = slt;
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/*
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* If this controller hasn't been seen before, then
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* link it into the list of controllers.
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*/
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if (ctrl->slots++ == 0) {
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ctrl->next = cont_list;
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cont_list = ctrl;
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if (ctrl->maxmem > NUM_MEM_WINDOWS)
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ctrl->maxmem = NUM_MEM_WINDOWS;
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if (ctrl->maxio > NUM_IO_WINDOWS)
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ctrl->maxio = NUM_IO_WINDOWS;
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}
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callout_handle_init(&slt->insert_ch);
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callout_handle_init(&slt->poff_ch);
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callout_handle_init(&slt->disable_ch);
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#if NAPM > 0
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{
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struct apmhook *ap;
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ap = &s_hook[slt->slotnum];
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ap->ah_fun = slot_suspend;
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ap->ah_arg = (void *)slt;
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ap->ah_name = "pcccard";
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ap->ah_order = APM_MID_ORDER;
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apm_hook_establish(APM_HOOK_SUSPEND, ap);
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ap = &r_hook[slt->slotnum];
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ap->ah_fun = slot_resume;
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ap->ah_arg = (void *)slt;
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ap->ah_name = "pccard";
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ap->ah_order = APM_MID_ORDER;
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apm_hook_establish(APM_HOOK_RESUME, ap);
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}
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#endif /* NAPM > 0 */
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return(slt);
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}
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/*
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* allocate_driver - Create a new device entry for this
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* slot, and attach a driver to it.
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*/
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static int
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allocate_driver(struct slot *slt, struct dev_desc *desc)
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{
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struct pccard_devinfo *devi;
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device_t pccarddev;
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int err, irq = 0;
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device_t child;
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pccarddev = devclass_get_device(pccard_devclass, 0);
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irq = ffs(desc->irqmask) - 1;
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MALLOC(devi, struct pccard_devinfo *, sizeof(*devi), M_DEVBUF, M_WAITOK);
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bzero(devi, sizeof(*devi));
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strcpy(devi->name, desc->name);
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/*
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* Create an entry for the device under this slot.
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*/
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devi->running = 1;
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devi->slt = slt;
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bcopy(desc->misc, devi->misc, sizeof(desc->misc));
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resource_list_init(&devi->resources);
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child = devi->isahd.id_device = device_add_child(pccarddev, devi->name,
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desc->unit, devi);
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device_set_flags(child, desc->flags);
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err = bus_set_resource(child, SYS_RES_IOPORT, 0, desc->iobase,
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desc->iosize);
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if (err)
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goto err;
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if (irq)
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err = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1);
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if (err)
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goto err;
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if (desc->memsize) {
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err = bus_set_resource(child, SYS_RES_MEMORY, 0, desc->mem,
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desc->memsize);
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if (err)
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goto err;
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}
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err = device_probe_and_attach(child);
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err:
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if (err)
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device_delete_child(pccarddev, child);
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return (err);
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}
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/*
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* card insert routine - Called from a timeout to debounce
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* insertion events.
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*/
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static void
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inserted(void *arg)
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{
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struct slot *slt = arg;
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slt->state = filled;
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/*
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* Enable 5V to the card so that the CIS can be read.
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*/
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slt->pwr.vcc = 50;
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slt->pwr.vpp = 0;
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/*
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* Disable any pending timeouts for this slot, and explicitly
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* power it off right now. Then, re-enable the power using
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* the (possibly new) power settings.
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*/
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untimeout(power_off_slot, (caddr_t)slt, slt->disable_ch);
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untimeout(power_off_slot, (caddr_t)slt, slt->poff_ch);
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power_off_slot(slt);
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slt->ctrl->power(slt);
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printf("pccard: card inserted, slot %d\n", slt->slotnum);
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/*
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* Now start resetting the card.
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*/
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slt->ctrl->reset(slt);
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}
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/*
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* Card event callback. Called at splhigh to prevent
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* device interrupts from interceding.
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*/
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void
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pccard_event(struct slot *slt, enum card_event event)
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{
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if (slt->insert_seq) {
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slt->insert_seq = 0;
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untimeout(inserted, (void *)slt, slt->insert_ch);
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}
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switch(event) {
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case card_removed:
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/*
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* The slot and devices are disabled, but the
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* data structures are not unlinked.
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*/
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if (slt->state == filled) {
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disable_slot_spl0(slt);
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}
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break;
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case card_inserted:
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slt->insert_seq = 1;
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slt->insert_ch = timeout(inserted, (void *)slt, hz/4);
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pccard_insert_beep();
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break;
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}
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}
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/*
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* Device driver interface.
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*/
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static int
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crdopen(dev_t dev, int oflags, int devtype, struct proc *p)
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{
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struct slot *slt;
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if (minor(dev) >= MAXSLOT)
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return(ENXIO);
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slt = pccard_slots[minor(dev)];
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if (slt == 0)
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return(ENXIO);
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if (slt->rwmem == 0)
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slt->rwmem = MDF_ATTR;
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return(0);
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}
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/*
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* Close doesn't de-allocate any resources, since
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* slots may be assigned to drivers already.
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*/
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static int
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crdclose(dev_t dev, int fflag, int devtype, struct proc *p)
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{
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return(0);
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}
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/*
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* read interface. Map memory at lseek offset,
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* then transfer to user space.
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*/
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static int
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crdread(dev_t dev, struct uio *uio, int ioflag)
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{
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struct slot *slt = pccard_slots[minor(dev)];
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struct mem_desc *mp, oldmap;
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unsigned char *p;
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unsigned int offs;
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int error = 0, win, count;
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if (slt == 0 || slt->state != filled)
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return(ENXIO);
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if (pccard_mem == 0)
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return(ENOMEM);
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for (win = 0; win < slt->ctrl->maxmem; win++)
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if ((slt->mem[win].flags & MDF_ACTIVE) == 0)
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break;
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if (win >= slt->ctrl->maxmem)
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return(EBUSY);
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mp = &slt->mem[win];
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oldmap = *mp;
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mp->flags = slt->rwmem|MDF_ACTIVE;
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while (uio->uio_resid && error == 0) {
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mp->card = uio->uio_offset;
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mp->size = PCCARD_MEMSIZE;
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mp->start = (caddr_t)(void *)(uintptr_t)pccard_mem;
|
|
if ((error = slt->ctrl->mapmem(slt, win)) != 0)
|
|
break;
|
|
offs = (unsigned int)uio->uio_offset & (PCCARD_MEMSIZE - 1);
|
|
p = pccard_kmem + offs;
|
|
count = MIN(PCCARD_MEMSIZE - offs, uio->uio_resid);
|
|
error = uiomove(p, count, uio);
|
|
}
|
|
/*
|
|
* Restore original map.
|
|
*/
|
|
*mp = oldmap;
|
|
slt->ctrl->mapmem(slt, win);
|
|
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* crdwrite - Write data to card memory.
|
|
* Handles wrap around so that only one memory
|
|
* window is used.
|
|
*/
|
|
static int
|
|
crdwrite(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
struct slot *slt = pccard_slots[minor(dev)];
|
|
struct mem_desc *mp, oldmap;
|
|
unsigned char *p;
|
|
unsigned int offs;
|
|
int error = 0, win, count;
|
|
|
|
if (slt == 0 || slt->state != filled)
|
|
return(ENXIO);
|
|
if (pccard_mem == 0)
|
|
return(ENOMEM);
|
|
for (win = 0; win < slt->ctrl->maxmem; win++)
|
|
if ((slt->mem[win].flags & MDF_ACTIVE) == 0)
|
|
break;
|
|
if (win >= slt->ctrl->maxmem)
|
|
return(EBUSY);
|
|
mp = &slt->mem[win];
|
|
oldmap = *mp;
|
|
mp->flags = slt->rwmem|MDF_ACTIVE;
|
|
while (uio->uio_resid && error == 0) {
|
|
mp->card = uio->uio_offset;
|
|
mp->size = PCCARD_MEMSIZE;
|
|
mp->start = (caddr_t)(void *)(uintptr_t)pccard_mem;
|
|
if ((error = slt->ctrl->mapmem(slt, win)) != 0)
|
|
break;
|
|
offs = (unsigned int)uio->uio_offset & (PCCARD_MEMSIZE - 1);
|
|
p = pccard_kmem + offs;
|
|
count = MIN(PCCARD_MEMSIZE - offs, uio->uio_resid);
|
|
error = uiomove(p, count, uio);
|
|
}
|
|
/*
|
|
* Restore original map.
|
|
*/
|
|
*mp = oldmap;
|
|
slt->ctrl->mapmem(slt, win);
|
|
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* ioctl calls - allows setting/getting of memory and I/O
|
|
* descriptors, and assignment of drivers.
|
|
*/
|
|
static int
|
|
crdioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *p)
|
|
{
|
|
struct slot *slt = pccard_slots[minor(dev)];
|
|
struct mem_desc *mp;
|
|
struct io_desc *ip;
|
|
int s, err;
|
|
int pwval;
|
|
|
|
if (slt == 0 && cmd != PIOCRWMEM)
|
|
return(ENXIO);
|
|
switch(cmd) {
|
|
default:
|
|
if (slt->ctrl->ioctl)
|
|
return(slt->ctrl->ioctl(slt, cmd, data));
|
|
return(ENOTTY);
|
|
/*
|
|
* Get slot state.
|
|
*/
|
|
case PIOCGSTATE:
|
|
s = splhigh();
|
|
((struct slotstate *)data)->state = slt->state;
|
|
((struct slotstate *)data)->laststate = slt->laststate;
|
|
slt->laststate = slt->state;
|
|
splx(s);
|
|
((struct slotstate *)data)->maxmem = slt->ctrl->maxmem;
|
|
((struct slotstate *)data)->maxio = slt->ctrl->maxio;
|
|
((struct slotstate *)data)->irqs = 0;
|
|
break;
|
|
/*
|
|
* Get memory context.
|
|
*/
|
|
case PIOCGMEM:
|
|
s = ((struct mem_desc *)data)->window;
|
|
if (s < 0 || s >= slt->ctrl->maxmem)
|
|
return(EINVAL);
|
|
mp = &slt->mem[s];
|
|
((struct mem_desc *)data)->flags = mp->flags;
|
|
((struct mem_desc *)data)->start = mp->start;
|
|
((struct mem_desc *)data)->size = mp->size;
|
|
((struct mem_desc *)data)->card = mp->card;
|
|
break;
|
|
/*
|
|
* Set memory context. If context already active, then unmap it.
|
|
* It is hard to see how the parameters can be checked.
|
|
* At the very least, we only allow root to set the context.
|
|
*/
|
|
case PIOCSMEM:
|
|
if (suser(p))
|
|
return(EPERM);
|
|
if (slt->state != filled)
|
|
return(ENXIO);
|
|
s = ((struct mem_desc *)data)->window;
|
|
if (s < 0 || s >= slt->ctrl->maxmem)
|
|
return(EINVAL);
|
|
slt->mem[s] = *((struct mem_desc *)data);
|
|
return(slt->ctrl->mapmem(slt, s));
|
|
/*
|
|
* Get I/O port context.
|
|
*/
|
|
case PIOCGIO:
|
|
s = ((struct io_desc *)data)->window;
|
|
if (s < 0 || s >= slt->ctrl->maxio)
|
|
return(EINVAL);
|
|
ip = &slt->io[s];
|
|
((struct io_desc *)data)->flags = ip->flags;
|
|
((struct io_desc *)data)->start = ip->start;
|
|
((struct io_desc *)data)->size = ip->size;
|
|
break;
|
|
/*
|
|
* Set I/O port context.
|
|
*/
|
|
case PIOCSIO:
|
|
if (suser(p))
|
|
return(EPERM);
|
|
if (slt->state != filled)
|
|
return(ENXIO);
|
|
s = ((struct io_desc *)data)->window;
|
|
if (s < 0 || s >= slt->ctrl->maxio)
|
|
return(EINVAL);
|
|
slt->io[s] = *((struct io_desc *)data);
|
|
/* XXX Don't actually map */
|
|
return 0;
|
|
break;
|
|
/*
|
|
* Set memory window flags for read/write interface.
|
|
*/
|
|
case PIOCRWFLAG:
|
|
slt->rwmem = *(int *)data;
|
|
break;
|
|
/*
|
|
* Set the memory window to be used for the read/write interface.
|
|
*/
|
|
case PIOCRWMEM:
|
|
if (*(unsigned long *)data == 0) {
|
|
if (pccard_mem)
|
|
*(unsigned long *)data = pccard_mem;
|
|
break;
|
|
}
|
|
if (suser(p))
|
|
return(EPERM);
|
|
/*
|
|
* Validate the memory by checking it against the I/O
|
|
* memory range. It must also start on an aligned block size.
|
|
*/
|
|
if (invalid_io_memory(*(unsigned long *)data, PCCARD_MEMSIZE))
|
|
return(EINVAL);
|
|
if (*(unsigned long *)data & (PCCARD_MEMSIZE-1))
|
|
return(EINVAL);
|
|
/*
|
|
* Map it to kernel VM.
|
|
*/
|
|
pccard_mem = *(unsigned long *)data;
|
|
pccard_kmem =
|
|
(unsigned char *)(void *)(uintptr_t)
|
|
(pccard_mem + atdevbase - IOM_BEGIN);
|
|
break;
|
|
/*
|
|
* Set power values.
|
|
*/
|
|
case PIOCSPOW:
|
|
slt->pwr = *(struct power *)data;
|
|
return(slt->ctrl->power(slt));
|
|
/*
|
|
* Allocate a driver to this slot.
|
|
*/
|
|
case PIOCSDRV:
|
|
if (suser(p))
|
|
return(EPERM);
|
|
err = allocate_driver(slt, (struct dev_desc *)data);
|
|
if (!err)
|
|
pccard_success_beep();
|
|
else
|
|
pccard_failure_beep();
|
|
return err;
|
|
/*
|
|
* Virtual removal/insertion
|
|
*/
|
|
case PIOCSVIR:
|
|
pwval = *(int *)data;
|
|
if (!pwval) {
|
|
if (slt->state != filled)
|
|
return EINVAL;
|
|
} else {
|
|
if (slt->state != empty)
|
|
return EINVAL;
|
|
}
|
|
pccard_event(slt, pwval == 0 ? card_removed : card_inserted);
|
|
break;
|
|
case PIOCSBEEP:
|
|
if (pccard_beep_select(*(int *)data)) {
|
|
return EINVAL;
|
|
}
|
|
break;
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* poll - Poll on exceptions will return true
|
|
* when a change in card status occurs.
|
|
*/
|
|
static int
|
|
crdpoll(dev_t dev, int events, struct proc *p)
|
|
{
|
|
int s;
|
|
struct slot *slt = pccard_slots[minor(dev)];
|
|
int revents = 0;
|
|
|
|
if (events & (POLLIN | POLLRDNORM))
|
|
revents |= events & (POLLIN | POLLRDNORM);
|
|
|
|
if (events & (POLLOUT | POLLWRNORM))
|
|
revents |= events & (POLLIN | POLLRDNORM);
|
|
|
|
s = splhigh();
|
|
/*
|
|
* select for exception - card event.
|
|
*/
|
|
if (events & POLLRDBAND)
|
|
if (slt == 0 || slt->laststate != slt->state)
|
|
revents |= POLLRDBAND;
|
|
|
|
if (revents == 0)
|
|
selrecord(p, &slt->selp);
|
|
|
|
splx(s);
|
|
return (revents);
|
|
}
|
|
|
|
/*
|
|
* invalid_io_memory - verify that the ISA I/O memory block
|
|
* is a valid and unallocated address.
|
|
* A simple check of the range is done, and then a
|
|
* search of the current devices is done to check for
|
|
* overlapping regions.
|
|
*/
|
|
static int
|
|
invalid_io_memory(unsigned long adr, int size)
|
|
{
|
|
/* XXX - What's magic about 0xC0000?? */
|
|
if (adr < 0xC0000 || (adr+size) > IOM_END)
|
|
return(1);
|
|
return(0);
|
|
}
|