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Diffstat (limited to 'sys/x86/isa/isa.c')
| -rw-r--r-- | sys/x86/isa/isa.c | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/sys/x86/isa/isa.c b/sys/x86/isa/isa.c new file mode 100644 index 0000000..7b2982a --- /dev/null +++ b/sys/x86/isa/isa.c @@ -0,0 +1,265 @@ +/*- + * 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("$FreeBSD$"); + +/*- + * 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/bus.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/module.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) +{ + + return bus_space_map_load(rman_get_bustag(re), rman_get_bushandle(re), + count, res, 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); + if (bh != NULL) { + 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, + driver_filter_t *filter, void (*ihand)(void *), void *arg, + void **cookiep) +{ + return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags, + filter, 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)); +} + +/* + * On this platform, isa can also attach to the legacy bus. + */ +DRIVER_MODULE(isa, legacy, isa_driver, isa_devclass, 0, 0); |
