249 lines
7.4 KiB
C
249 lines
7.4 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#ifdef PC98
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#include <sys/systm.h>
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#endif
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#include <machine/resource.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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/*
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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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rman_res_t start, rman_res_t end, rman_res_t 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 = RMAN_IS_DEFAULT_RANGE(start, end);
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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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#ifdef PC98
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/*
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* Indirection support. The type of bus_space_handle_t is
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* defined in sys/i386/include/bus_pc98.h.
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*/
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struct resource *
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isa_alloc_resourcev(device_t child, int type, int *rid,
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bus_addr_t *res, bus_size_t count, u_int flags)
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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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device_t bus = device_get_parent(child);
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bus_addr_t start;
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bus_space_handle_t bh;
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struct resource *re;
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struct resource **bsre;
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int i, j, k, linear_cnt, ressz, bsrid;
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start = bus_get_resource_start(child, type, *rid);
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linear_cnt = count;
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ressz = 1;
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for (i = 1; i < count; ++i) {
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if (res[i] != res[i - 1] + 1) {
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if (i < linear_cnt)
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linear_cnt = i;
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++ressz;
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}
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}
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re = isa_alloc_resource(bus, child, type, rid,
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start + res[0], start + res[linear_cnt - 1],
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linear_cnt, flags);
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if (re == NULL)
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return NULL;
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bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT);
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if (bsre == NULL) {
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resource_list_release(rl, bus, child, type, *rid, re);
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return NULL;
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}
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bsre[0] = re;
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for (i = linear_cnt, k = 1; i < count; i = j, k++) {
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for (j = i + 1; j < count; j++) {
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if (res[j] != res[j - 1] + 1)
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break;
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}
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bsrid = *rid + k;
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bsre[k] = isa_alloc_resource(bus, child, type, &bsrid,
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start + res[i], start + res[j - 1], j - i, flags);
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if (bsre[k] == NULL) {
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for (k--; k >= 0; k--)
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resource_list_release(rl, bus, child, type,
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*rid + k, bsre[k]);
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free(bsre, M_DEVBUF);
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return NULL;
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}
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}
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bh = rman_get_bushandle(re);
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bh->bsh_res = bsre;
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bh->bsh_ressz = ressz;
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return re;
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}
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int
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isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count)
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{
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return bus_space_map_load(rman_get_bustag(re), rman_get_bushandle(re),
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count, res, 0);
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}
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#endif /* PC98 */
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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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#ifdef PC98
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/*
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* Indirection support. The type of bus_space_handle_t is
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* defined in sys/i386/include/bus_pc98.h.
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*/
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int i;
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bus_space_handle_t bh;
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if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
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bh = rman_get_bushandle(r);
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if (bh != NULL) {
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for (i = 1; i < bh->bsh_ressz; i++)
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resource_list_release(rl, bus, child, type,
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rid + i, bh->bsh_res[i]);
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if (bh->bsh_res != NULL)
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free(bh->bsh_res, M_DEVBUF);
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}
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}
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#endif
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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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* On this platform, isa can also attach to the legacy bus.
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*/
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DRIVER_MODULE(isa, legacy, isa_driver, isa_devclass, 0, 0);
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/*
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* Attach the ISA bus to the xenpv bus in order to get syscons.
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*/
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DRIVER_MODULE(isa, xenpv, isa_driver, isa_devclass, 0, 0);
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