FreeBSD-5.3/sys/i386/isa/isa.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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/i386/isa/isa.c,v 1.146 2004/07/03 20:11:49 imp 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.
*/
#ifdef PC98
#define __RMAN_RESOURCE_VISIBLE
#endif
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <sys/rman.h>
#ifdef PC98
#include <sys/systm.h>
#endif
#include <machine/resource.h>
#include <isa/isavar.h>
#include <isa/isa_common.h>
void
isa_init(device_t dev)
{
}
/*
* 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.
*/
int passthrough = (device_get_parent(child) != bus);
int isdefault = (start == 0UL && end == ~0UL);
struct isa_device* idev = DEVTOISA(child);
struct resource_list *rl = &idev->id_resources;
struct resource_list_entry *rle;
if (!passthrough && !isdefault) {
rle = resource_list_find(rl, type, *rid);
if (!rle) {
if (*rid < 0)
return 0;
switch (type) {
case SYS_RES_IRQ:
if (*rid >= ISA_NIRQ)
return 0;
break;
case SYS_RES_DRQ:
if (*rid >= ISA_NDRQ)
return 0;
break;
case SYS_RES_MEMORY:
if (*rid >= ISA_NMEM)
return 0;
break;
case SYS_RES_IOPORT:
if (*rid >= ISA_NPORT)
return 0;
break;
default:
return 0;
}
resource_list_add(rl, type, *rid, start, end, count);
}
}
return resource_list_alloc(rl, bus, child, type, rid,
start, end, count, flags);
}
#ifdef PC98
/*
* Indirection support. The type of bus_space_handle_t is
* defined in sys/i386/include/bus_pc98.h.
*/
struct resource *
isa_alloc_resourcev(device_t child, int type, int *rid,
bus_addr_t *res, bus_size_t count, u_int flags)
{
struct isa_device* idev = DEVTOISA(child);
struct resource_list *rl = &idev->id_resources;
device_t bus = device_get_parent(child);
bus_addr_t start;
bus_space_handle_t bh;
struct resource *re;
struct resource **bsre;
int i, j, k, linear_cnt, ressz, bsrid;
start = bus_get_resource_start(child, type, *rid);
linear_cnt = count;
ressz = 1;
for (i = 1; i < count; ++i) {
if (res[i] != res[i - 1] + 1) {
if (i < linear_cnt)
linear_cnt = i;
++ressz;
}
}
re = isa_alloc_resource(bus, child, type, rid,
start + res[0], start + res[linear_cnt - 1],
linear_cnt, flags);
if (re == NULL)
return NULL;
bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT);
if (bsre == NULL) {
resource_list_release(rl, bus, child, type, *rid, re);
return NULL;
}
bsre[0] = re;
for (i = linear_cnt, k = 1; i < count; i = j, k++) {
for (j = i + 1; j < count; j++) {
if (res[j] != res[j - 1] + 1)
break;
}
bsrid = *rid + k;
bsre[k] = isa_alloc_resource(bus, child, type, &bsrid,
start + res[i], start + res[j - 1], j - i, flags);
if (bsre[k] == NULL) {
for (k--; k >= 0; k--)
resource_list_release(rl, bus, child, type,
*rid + k, bsre[k]);
free(bsre, M_DEVBUF);
return NULL;
}
}
bh = rman_get_bushandle(re);
bh->bsh_res = bsre;
bh->bsh_ressz = ressz;
return re;
}
int
isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count)
{
bus_addr_t start;
bus_space_handle_t bh;
int i;
bh = rman_get_bushandle(re);
if (count > bh->bsh_maxiatsz) {
printf("isa_load_resourcev: map size too large\n");
return EINVAL;
}
start = rman_get_start(re);
for (i = 0; i < bh->bsh_maxiatsz; i++) {
if (i < count)
bh->bsh_iat[i] = start + res[i];
else
bh->bsh_iat[i] = start;
}
bh->bsh_iatsz = count;
bh->bsh_bam = rman_get_bustag(re)->bs_ra; /* relocate access */
return 0;
}
#endif /* PC98 */
int
isa_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
struct isa_device* idev = DEVTOISA(child);
struct resource_list *rl = &idev->id_resources;
#ifdef PC98
/*
* Indirection support. The type of bus_space_handle_t is
* defined in sys/i386/include/bus_pc98.h.
*/
int i;
bus_space_handle_t bh;
if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
bh = rman_get_bushandle(r);
for (i = 1; i < bh->bsh_ressz; i++)
resource_list_release(rl, bus, child, type, rid + i,
bh->bsh_res[i]);
if (bh->bsh_res != NULL)
free(bh->bsh_res, M_DEVBUF);
}
#endif
return resource_list_release(rl, 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));
}