2 * Copyright (c) 1998 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 * $FreeBSD: src/sys/i386/isa/isa.c,v 1.132.2.5 2002/03/03 05:42:50 nyan Exp $
30 * Modifications for Intel architecture by Garrett A. Wollman.
31 * Copyright 1998 Massachusetts Institute of Technology
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34 * its documentation for any purpose and without fee is hereby
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50 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
51 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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59 #include <sys/param.h>
61 #include <sys/malloc.h>
62 #include <machine/bus.h>
65 #include <machine/resource.h>
67 #include <isa/isavar.h>
68 #include <isa/isa_common.h>
73 isa_wrap_old_drivers();
77 * This implementation simply passes the request up to the parent
78 * bus, which in our case is the special i386 nexus, substituting any
79 * configured values if the caller defaulted. We can get away with
80 * this because there is no special mapping for ISA resources on an Intel
81 * platform. When porting this code to another architecture, it may be
82 * necessary to interpose a mapping layer here.
85 isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
86 u_long start, u_long end, u_long count, u_int flags)
89 * Consider adding a resource definition. We allow rid 0-1 for
90 * irq and drq, 0-3 for memory and 0-7 for ports which is
91 * sufficient for isapnp.
93 int passthrough = (device_get_parent(child) != bus);
94 int isdefault = (start == 0UL && end == ~0UL);
95 struct isa_device* idev = DEVTOISA(child);
96 struct resource_list *rl = &idev->id_resources;
97 struct resource_list_entry *rle;
99 if (!passthrough && !isdefault) {
100 rle = resource_list_find(rl, type, *rid);
106 if (*rid >= ISA_NIRQ)
110 if (*rid >= ISA_NDRQ)
114 if (*rid >= ISA_NMEM)
118 if (*rid >= ISA_NPORT)
124 resource_list_add(rl, type, *rid, start, end, count);
128 return resource_list_alloc(rl, bus, child, type, rid,
129 start, end, count, flags);
134 * Indirection support. The type of bus_space_handle_t is
135 * defined in sys/i386/include/bus_pc98.h.
138 isa_alloc_resourcev(device_t child, int type, int *rid,
139 bus_addr_t *res, bus_size_t count, u_int flags)
141 struct isa_device* idev = DEVTOISA(child);
142 struct resource_list *rl = &idev->id_resources;
144 device_t bus = device_get_parent(child);
147 struct resource **bsre;
148 int i, j, k, linear_cnt, ressz, bsrid;
150 start = bus_get_resource_start(child, type, *rid);
154 for (i = 1; i < count; ++i) {
155 if (res[i] != res[i - 1] + 1) {
162 re = isa_alloc_resource(bus, child, type, rid,
163 start + res[0], start + res[linear_cnt - 1],
168 bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT);
170 resource_list_release(rl, bus, child, type, *rid, re);
175 for (i = linear_cnt, k = 1; i < count; i = j, k++) {
176 for (j = i + 1; j < count; j++) {
177 if (res[j] != res[j - 1] + 1)
181 bsre[k] = isa_alloc_resource(bus, child, type, &bsrid,
182 start + res[i], start + res[j - 1], j - i, flags);
183 if (bsre[k] == NULL) {
184 for (k--; k >= 0; k--)
185 resource_list_release(rl, bus, child, type,
187 free(bsre, M_DEVBUF);
192 re->r_bushandle->bsh_res = bsre;
193 re->r_bushandle->bsh_ressz = ressz;
199 isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count)
204 if (count > re->r_bushandle->bsh_maxiatsz) {
205 printf("isa_load_resourcev: map size too large\n");
209 start = rman_get_start(re);
210 for (i = 0; i < re->r_bushandle->bsh_maxiatsz; i++) {
212 re->r_bushandle->bsh_iat[i] = start + res[i];
214 re->r_bushandle->bsh_iat[i] = start;
217 re->r_bushandle->bsh_iatsz = count;
218 re->r_bushandle->bsh_bam = re->r_bustag->bs_ra; /* relocate access */
225 isa_release_resource(device_t bus, device_t child, int type, int rid,
228 struct isa_device* idev = DEVTOISA(child);
229 struct resource_list *rl = &idev->id_resources;
232 * Indirection support. The type of bus_space_handle_t is
233 * defined in sys/i386/include/bus_pc98.h.
237 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
238 for (i = 1; i < r->r_bushandle->bsh_ressz; i++)
239 resource_list_release(rl, bus, child, type, rid + i,
240 r->r_bushandle->bsh_res[i]);
241 if (r->r_bushandle->bsh_res != NULL)
242 free(r->r_bushandle->bsh_res, M_DEVBUF);
245 return resource_list_release(rl, bus, child, type, rid, r);
249 * We can't use the bus_generic_* versions of these methods because those
250 * methods always pass the bus param as the requesting device, and we need
251 * to pass the child (the i386 nexus knows about this and is prepared to
255 isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
256 void (*ihand)(void *), void *arg, void **cookiep)
258 return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
259 ihand, arg, cookiep));
263 isa_teardown_intr(device_t bus, device_t child, struct resource *r,
266 return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie));