isa.c revision 65570
14Srgrimes/*- 245720Speter * Copyright (c) 1998 Doug Rabson 34Srgrimes * All rights reserved. 44Srgrimes * 54Srgrimes * Redistribution and use in source and binary forms, with or without 64Srgrimes * modification, are permitted provided that the following conditions 74Srgrimes * are met: 84Srgrimes * 1. Redistributions of source code must retain the above copyright 94Srgrimes * notice, this list of conditions and the following disclaimer. 104Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 114Srgrimes * notice, this list of conditions and the following disclaimer in the 124Srgrimes * documentation and/or other materials provided with the distribution. 134Srgrimes * 1445720Speter * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 154Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 164Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1745720Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 184Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 194Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 204Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 214Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 224Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 234Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 244Srgrimes * SUCH DAMAGE. 254Srgrimes * 2650477Speter * $FreeBSD: head/sys/i386/isa/isa.c 65570 2000-09-07 14:43:00Z nyan $ 274Srgrimes */ 284Srgrimes 294Srgrimes/* 3045720Speter * Modifications for Intel architecture by Garrett A. Wollman. 3145720Speter * Copyright 1998 Massachusetts Institute of Technology 324Srgrimes * 3345720Speter * Permission to use, copy, modify, and distribute this software and 3445720Speter * its documentation for any purpose and without fee is hereby 3545720Speter * granted, provided that both the above copyright notice and this 3645720Speter * permission notice appear in all copies, that both the above 3745720Speter * copyright notice and this permission notice appear in all 3845720Speter * supporting documentation, and that the name of M.I.T. not be used 3945720Speter * in advertising or publicity pertaining to distribution of the 4045720Speter * software without specific, written prior permission. M.I.T. makes 4145720Speter * no representations about the suitability of this software for any 4245720Speter * purpose. It is provided "as is" without express or implied 4345720Speter * warranty. 4445720Speter * 4545720Speter * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 4645720Speter * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 4745720Speter * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 4845720Speter * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 4945720Speter * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 5045720Speter * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 5145720Speter * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 5245720Speter * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 5345720Speter * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 5445720Speter * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 5545720Speter * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5645720Speter * SUCH DAMAGE. 574Srgrimes */ 584Srgrimes 592056Swollman#include <sys/param.h> 6045720Speter#include <sys/bus.h> 612056Swollman#include <sys/malloc.h> 6245720Speter#include <machine/bus.h> 6358762Skato#include <sys/rman.h> 644Srgrimes 6545720Speter#include <machine/resource.h> 6626157Sse 6745720Speter#include <isa/isavar.h> 6847398Sdfr#include <isa/isa_common.h> 6929613Sjmg 7047398Sdfrvoid 7147398Sdfrisa_init(void) 7231457Sjmg{ 733258Sdg} 748876Srgrimes 7547178Sdfr/* 7645720Speter * This implementation simply passes the request up to the parent 7745720Speter * bus, which in our case is the special i386 nexus, substituting any 7845720Speter * configured values if the caller defaulted. We can get away with 7945720Speter * this because there is no special mapping for ISA resources on an Intel 8045720Speter * platform. When porting this code to another architecture, it may be 8145720Speter * necessary to interpose a mapping layer here. 8215147Ssmpatel */ 8347398Sdfrstruct resource * 8445720Speterisa_alloc_resource(device_t bus, device_t child, int type, int *rid, 8545720Speter u_long start, u_long end, u_long count, u_int flags) 8615147Ssmpatel{ 8745720Speter /* 8847398Sdfr * Consider adding a resource definition. We allow rid 0-1 for 8947616Sdfr * irq and drq, 0-3 for memory and 0-7 for ports which is 9047616Sdfr * sufficient for isapnp. 9145720Speter */ 9247398Sdfr int passthrough = (device_get_parent(child) != bus); 9347398Sdfr int isdefault = (start == 0UL && end == ~0UL); 9452174Sdfr struct isa_device* idev = DEVTOISA(child); 9552174Sdfr struct resource_list *rl = &idev->id_resources; 9647398Sdfr struct resource_list_entry *rle; 9747398Sdfr 9847398Sdfr if (!passthrough && !isdefault) { 9947398Sdfr rle = resource_list_find(rl, type, *rid); 10047398Sdfr if (!rle) { 10147398Sdfr if (*rid < 0) 10247398Sdfr return 0; 10352174Sdfr switch (type) { 10452174Sdfr case SYS_RES_IRQ: 10552174Sdfr if (*rid >= ISA_NIRQ) 10652174Sdfr return 0; 10752174Sdfr break; 10852174Sdfr case SYS_RES_DRQ: 10952174Sdfr if (*rid >= ISA_NDRQ) 11052174Sdfr return 0; 11152174Sdfr break; 11252174Sdfr case SYS_RES_MEMORY: 11352174Sdfr if (*rid >= ISA_NMEM) 11452174Sdfr return 0; 11552174Sdfr break; 11652174Sdfr case SYS_RES_IOPORT: 11752174Sdfr if (*rid >= ISA_NPORT) 11852174Sdfr return 0; 11952174Sdfr break; 12052174Sdfr default: 12147398Sdfr return 0; 12252174Sdfr } 12347398Sdfr resource_list_add(rl, type, *rid, start, end, count); 12445720Speter } 12545720Speter } 12647398Sdfr 12752174Sdfr return resource_list_alloc(rl, bus, child, type, rid, 12847398Sdfr start, end, count, flags); 12945720Speter} 13015147Ssmpatel 13158762Skato#ifdef PC98 13258762Skato/* 13358762Skato * Indirection support. The type of bus_space_handle_t is 13458762Skato * defined in sys/i386/include/bus_pc98.h. 13558762Skato */ 13658762Skatostruct resource * 13758762Skatoisa_alloc_resourcev(device_t child, int type, int *rid, 13858762Skato bus_addr_t *res, bus_size_t count, u_int flags) 13958762Skato{ 14058762Skato struct isa_device* idev = DEVTOISA(child); 14158762Skato struct resource_list *rl = &idev->id_resources; 14258762Skato 14358762Skato device_t bus = device_get_parent(child); 14458762Skato bus_addr_t ioport; 14558762Skato struct resource *re; 14658762Skato struct resource **bsre; 14758762Skato int i, j, k, linear_cnt, ressz, bsrid; 14858762Skato 14958762Skato ioport = bus_get_resource_start(child, SYS_RES_IOPORT, 0); 15058762Skato 15158762Skato linear_cnt = count; 15258762Skato ressz = 1; 15358762Skato for (i = 1; i < count; ++i) { 15465570Snyan if (res[i] != res[i - 1] + 1) { 15558762Skato if (i < linear_cnt) 15658762Skato linear_cnt = i; 15758762Skato ++ressz; 15858762Skato } 15958762Skato } 16058762Skato 16158762Skato re = isa_alloc_resource(bus, child, type, rid, ioport + res[0], 16258762Skato ioport + res[linear_cnt - 1], linear_cnt, flags); 16358762Skato if (re == NULL) 16458762Skato return NULL; 16558762Skato 16658762Skato bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT); 16758762Skato if (bsre == NULL) { 16858762Skato resource_list_release(rl, bus, child, type, *rid, re); 16958762Skato return NULL; 17058762Skato } 17158762Skato bsre[0] = re; 17258762Skato 17358762Skato for (i = linear_cnt, k = 1; i < count; i = j, k++) { 17458762Skato for (j = i + 1; j < count; j++) { 17565570Snyan if (res[j] != res[j - 1] + 1) 17658762Skato break; 17758762Skato } 17858762Skato bsrid = *rid + k; 17958762Skato bsre[k] = isa_alloc_resource(bus, child, type, &bsrid, 18058762Skato ioport + res[i], ioport + res[j - 1], j - i, flags); 18158762Skato if (bsre[k] == NULL) { 18258762Skato for (k--; k >= 0; k--) 18358762Skato resource_list_release(rl, bus, child, type, 18458762Skato *rid + k, bsre[k]); 18558762Skato free(bsre, M_DEVBUF); 18658762Skato return NULL; 18758762Skato } 18858762Skato } 18958762Skato 19058762Skato re->r_bushandle.bsh_res = bsre; 19158762Skato re->r_bushandle.bsh_ressz = ressz; 19258762Skato 19358762Skato return re; 19458762Skato} 19558762Skato 19647398Sdfrint 19758762Skatoisa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count) 19858762Skato{ 19958762Skato bus_addr_t *addr; 20058762Skato int i; 20158762Skato 20258762Skato addr = malloc(sizeof (bus_addr_t) * count, M_DEVBUF, M_NOWAIT); 20358762Skato if (addr == NULL) 20458762Skato return 1; 20558762Skato 20658762Skato for (i = 0; i < count; i++) 20758762Skato addr[i] = rman_get_start(re) + res[i]; 20858762Skato 20958762Skato rman_set_bustag(re, I386_BUS_SPACE_IO_IND); 21058762Skato re->r_bushandle.bsh_iat = addr; 21158762Skato re->r_bushandle.bsh_iatsz = count; 21258762Skato 21358762Skato return 0; 21458762Skato} 21558762Skato#endif /* PC98 */ 21658762Skato 21758762Skatoint 21845720Speterisa_release_resource(device_t bus, device_t child, int type, int rid, 21945720Speter struct resource *r) 22045720Speter{ 22152174Sdfr struct isa_device* idev = DEVTOISA(child); 22252174Sdfr struct resource_list *rl = &idev->id_resources; 22358762Skato#ifdef PC98 22458762Skato /* 22558762Skato * Indirection support. The type of bus_space_handle_t is 22658762Skato * defined in sys/i386/include/bus_pc98.h. 22758762Skato */ 22858762Skato int i; 22958762Skato 23058762Skato for (i = 1; i < r->r_bushandle.bsh_ressz; i++) 23158762Skato resource_list_release(rl, bus, child, type, rid + i, 23258762Skato r->r_bushandle.bsh_res[i]); 23358762Skato if (r->r_bushandle.bsh_res != NULL) 23458762Skato free(r->r_bushandle.bsh_res, M_DEVBUF); 23558762Skato if (r->r_bushandle.bsh_iat != NULL) 23658762Skato free(r->r_bushandle.bsh_iat, M_DEVBUF); 23758762Skato#endif 23852174Sdfr return resource_list_release(rl, bus, child, type, rid, r); 2394Srgrimes} 2404Srgrimes 2414Srgrimes/* 24245720Speter * We can't use the bus_generic_* versions of these methods because those 24345720Speter * methods always pass the bus param as the requesting device, and we need 24445720Speter * to pass the child (the i386 nexus knows about this and is prepared to 24545720Speter * deal). 2464Srgrimes */ 24747398Sdfrint 24846743Sdfrisa_setup_intr(device_t bus, device_t child, struct resource *r, int flags, 24945720Speter void (*ihand)(void *), void *arg, void **cookiep) 25031457Sjmg{ 25146743Sdfr return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags, 25246743Sdfr ihand, arg, cookiep)); 2534Srgrimes} 2544Srgrimes 25547398Sdfrint 25645720Speterisa_teardown_intr(device_t bus, device_t child, struct resource *r, 25745720Speter void *cookie) 25827639Smsmith{ 25945720Speter return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie)); 26027639Smsmith} 261