freebsd-dev/sys/i386/isa/isa.c

150 lines
5.4 KiB
C

/*-
* Copyright (c) 1998 Doug Rabson
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $Id: isa.c,v 1.127 1999/05/22 15:18:12 dfr Exp $
*/
/*
* Modifications for Intel architecture by Garrett A. Wollman.
* Copyright 1998 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. M.I.T. makes
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <isa/isavar.h>
#include <isa/isa_common.h>
void
isa_init(void)
{
isa_wrap_old_drivers();
}
/*
* This implementation simply passes the request up to the parent
* bus, which in our case is the special i386 nexus, substituting any
* configured values if the caller defaulted. We can get away with
* this because there is no special mapping for ISA resources on an Intel
* platform. When porting this code to another architecture, it may be
* necessary to interpose a mapping layer here.
*/
struct resource *
isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
/*
* Consider adding a resource definition. We allow rid 0-1 for
* irq and drq, 0-3 for memory and 0-7 for ports which is
* sufficient for isapnp.
*/
int passthrough = (device_get_parent(child) != bus);
int isdefault = (start == 0UL && end == ~0UL);
struct resource_list *rl;
struct resource_list_entry *rle;
if (!passthrough && !isdefault) {
rl = device_get_ivars(child);
rle = resource_list_find(rl, type, *rid);
if (!rle) {
if (*rid < 0)
return 0;
if (type == SYS_RES_IRQ && *rid > 1)
return 0;
if (type == SYS_RES_DRQ && *rid > 1)
return 0;
if (type != SYS_RES_MEMORY && *rid > 3)
return 0;
if (type == SYS_RES_IOPORT && *rid > 7)
return 0;
resource_list_add(rl, type, *rid, start, end, count);
}
}
return resource_list_alloc(bus, child, type, rid,
start, end, count, flags);
}
int
isa_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
return resource_list_release(bus, child, type, rid, r);
}
/*
* We can't use the bus_generic_* versions of these methods because those
* methods always pass the bus param as the requesting device, and we need
* to pass the child (the i386 nexus knows about this and is prepared to
* deal).
*/
int
isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
void (*ihand)(void *), void *arg, void **cookiep)
{
return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
ihand, arg, cookiep));
}
int
isa_teardown_intr(device_t bus, device_t child, struct resource *r,
void *cookie)
{
return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie));
}