171 lines
5.6 KiB
C
171 lines
5.6 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Modifications for Intel architecture by Garrett A. Wollman.
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* Copyright 1998 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <isa/isareg.h>
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#include <isa/isavar.h>
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#include <isa/isa_common.h>
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void
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isa_init(device_t dev)
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{
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}
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intrmask_t
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isa_irq_pending(void)
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{
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u_char irr1;
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u_char irr2;
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irr1 = inb(IO_ICU1);
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irr2 = inb(IO_ICU2);
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return ((irr2 << 8) | irr1);
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}
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/*
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* This implementation simply passes the request up to the parent
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* bus, which in our case is the special i386 nexus, substituting any
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* configured values if the caller defaulted. We can get away with
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* this because there is no special mapping for ISA resources on an Intel
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* platform. When porting this code to another architecture, it may be
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* necessary to interpose a mapping layer here.
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*/
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struct resource *
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isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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/*
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* Consider adding a resource definition.
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*/
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int passthrough = (device_get_parent(child) != bus);
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int isdefault = (start == 0UL && end == ~0UL);
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struct isa_device* idev = DEVTOISA(child);
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struct resource_list *rl = &idev->id_resources;
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struct resource_list_entry *rle;
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if (!passthrough && !isdefault) {
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rle = resource_list_find(rl, type, *rid);
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if (!rle) {
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if (*rid < 0)
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return 0;
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switch (type) {
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case SYS_RES_IRQ:
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if (*rid >= ISA_NIRQ)
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return 0;
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break;
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case SYS_RES_DRQ:
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if (*rid >= ISA_NDRQ)
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return 0;
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break;
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case SYS_RES_MEMORY:
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if (*rid >= ISA_NMEM)
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return 0;
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break;
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case SYS_RES_IOPORT:
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if (*rid >= ISA_NPORT)
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return 0;
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break;
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default:
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return 0;
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}
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resource_list_add(rl, type, *rid, start, end, count);
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}
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}
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return resource_list_alloc(rl, bus, child, type, rid,
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start, end, count, flags);
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}
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int
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isa_release_resource(device_t bus, device_t child, int type, int rid,
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struct resource *r)
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{
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struct isa_device* idev = DEVTOISA(child);
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struct resource_list *rl = &idev->id_resources;
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return resource_list_release(rl, bus, child, type, rid, r);
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}
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/*
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* We can't use the bus_generic_* versions of these methods because those
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* methods always pass the bus param as the requesting device, and we need
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* to pass the child (the i386 nexus knows about this and is prepared to
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* deal).
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*/
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int
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isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
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driver_filter_t filter, void (*ihand)(void *), void *arg,
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void **cookiep)
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{
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return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
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filter, ihand, arg, cookiep));
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}
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int
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isa_teardown_intr(device_t bus, device_t child, struct resource *r,
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void *cookie)
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{
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return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie));
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}
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