30/* 31 * Modifications for Intel architecture by Garrett A. Wollman. 32 * Copyright 1998 Massachusetts Institute of Technology 33 * 34 * Permission to use, copy, modify, and distribute this software and 35 * its documentation for any purpose and without fee is hereby 36 * granted, provided that both the above copyright notice and this 37 * permission notice appear in all copies, that both the above 38 * copyright notice and this permission notice appear in all 39 * supporting documentation, and that the name of M.I.T. not be used 40 * in advertising or publicity pertaining to distribution of the 41 * software without specific, written prior permission. M.I.T. makes 42 * no representations about the suitability of this software for any 43 * purpose. It is provided "as is" without express or implied 44 * warranty. 45 * 46 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 47 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 48 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 49 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 50 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 51 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 52 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 53 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 54 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 55 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 56 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 */ 59 60#include <sys/param.h> 61#include <sys/bus.h> 62#include <sys/malloc.h> 63#include <machine/bus.h> 64#include <sys/rman.h> 65#ifdef PC98 66#include <sys/systm.h> 67#endif 68 69#include <machine/resource.h> 70 71#include <isa/isavar.h> 72#include <isa/isa_common.h> 73 74void 75isa_init(device_t dev) 76{ 77} 78 79/* 80 * This implementation simply passes the request up to the parent 81 * bus, which in our case is the special i386 nexus, substituting any 82 * configured values if the caller defaulted. We can get away with 83 * this because there is no special mapping for ISA resources on an Intel 84 * platform. When porting this code to another architecture, it may be 85 * necessary to interpose a mapping layer here. 86 */ 87struct resource * 88isa_alloc_resource(device_t bus, device_t child, int type, int *rid, 89 u_long start, u_long end, u_long count, u_int flags) 90{ 91 /* 92 * Consider adding a resource definition. We allow rid 0-1 for 93 * irq and drq, 0-3 for memory and 0-7 for ports which is 94 * sufficient for isapnp. 95 */ 96 int passthrough = (device_get_parent(child) != bus); 97 int isdefault = (start == 0UL && end == ~0UL); 98 struct isa_device* idev = DEVTOISA(child); 99 struct resource_list *rl = &idev->id_resources; 100 struct resource_list_entry *rle; 101 102 if (!passthrough && !isdefault) { 103 rle = resource_list_find(rl, type, *rid); 104 if (!rle) { 105 if (*rid < 0) 106 return 0; 107 switch (type) { 108 case SYS_RES_IRQ: 109 if (*rid >= ISA_NIRQ) 110 return 0; 111 break; 112 case SYS_RES_DRQ: 113 if (*rid >= ISA_NDRQ) 114 return 0; 115 break; 116 case SYS_RES_MEMORY: 117 if (*rid >= ISA_NMEM) 118 return 0; 119 break; 120 case SYS_RES_IOPORT: 121 if (*rid >= ISA_NPORT) 122 return 0; 123 break; 124 default: 125 return 0; 126 } 127 resource_list_add(rl, type, *rid, start, end, count); 128 } 129 } 130 131 return resource_list_alloc(rl, bus, child, type, rid, 132 start, end, count, flags); 133} 134 135#ifdef PC98 136/* 137 * Indirection support. The type of bus_space_handle_t is 138 * defined in sys/i386/include/bus_pc98.h. 139 */ 140struct resource * 141isa_alloc_resourcev(device_t child, int type, int *rid, 142 bus_addr_t *res, bus_size_t count, u_int flags) 143{ 144 struct isa_device* idev = DEVTOISA(child); 145 struct resource_list *rl = &idev->id_resources; 146 147 device_t bus = device_get_parent(child); 148 bus_addr_t start; 149 struct resource *re; 150 struct resource **bsre; 151 int i, j, k, linear_cnt, ressz, bsrid; 152 153 start = bus_get_resource_start(child, type, *rid); 154 155 linear_cnt = count; 156 ressz = 1; 157 for (i = 1; i < count; ++i) { 158 if (res[i] != res[i - 1] + 1) { 159 if (i < linear_cnt) 160 linear_cnt = i; 161 ++ressz; 162 } 163 } 164 165 re = isa_alloc_resource(bus, child, type, rid, 166 start + res[0], start + res[linear_cnt - 1], 167 linear_cnt, flags); 168 if (re == NULL) 169 return NULL; 170 171 bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT); 172 if (bsre == NULL) { 173 resource_list_release(rl, bus, child, type, *rid, re); 174 return NULL; 175 } 176 bsre[0] = re; 177 178 for (i = linear_cnt, k = 1; i < count; i = j, k++) { 179 for (j = i + 1; j < count; j++) { 180 if (res[j] != res[j - 1] + 1) 181 break; 182 } 183 bsrid = *rid + k; 184 bsre[k] = isa_alloc_resource(bus, child, type, &bsrid, 185 start + res[i], start + res[j - 1], j - i, flags); 186 if (bsre[k] == NULL) { 187 for (k--; k >= 0; k--) 188 resource_list_release(rl, bus, child, type, 189 *rid + k, bsre[k]); 190 free(bsre, M_DEVBUF); 191 return NULL; 192 } 193 } 194 195 re->r_bushandle->bsh_res = bsre; 196 re->r_bushandle->bsh_ressz = ressz; 197 198 return re; 199} 200 201int 202isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count) 203{ 204 bus_addr_t start; 205 int i; 206 207 if (count > re->r_bushandle->bsh_maxiatsz) { 208 printf("isa_load_resourcev: map size too large\n"); 209 return EINVAL; 210 } 211 212 start = rman_get_start(re); 213 for (i = 0; i < re->r_bushandle->bsh_maxiatsz; i++) { 214 if (i < count) 215 re->r_bushandle->bsh_iat[i] = start + res[i]; 216 else 217 re->r_bushandle->bsh_iat[i] = start; 218 } 219 220 re->r_bushandle->bsh_iatsz = count; 221 re->r_bushandle->bsh_bam = re->r_bustag->bs_ra; /* relocate access */ 222 223 return 0; 224} 225#endif /* PC98 */ 226 227int 228isa_release_resource(device_t bus, device_t child, int type, int rid, 229 struct resource *r) 230{ 231 struct isa_device* idev = DEVTOISA(child); 232 struct resource_list *rl = &idev->id_resources; 233#ifdef PC98 234 /* 235 * Indirection support. The type of bus_space_handle_t is 236 * defined in sys/i386/include/bus_pc98.h. 237 */ 238 int i; 239 240 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 241 for (i = 1; i < r->r_bushandle->bsh_ressz; i++) 242 resource_list_release(rl, bus, child, type, rid + i, 243 r->r_bushandle->bsh_res[i]); 244 if (r->r_bushandle->bsh_res != NULL) 245 free(r->r_bushandle->bsh_res, M_DEVBUF); 246 } 247#endif 248 return resource_list_release(rl, bus, child, type, rid, r); 249} 250 251/* 252 * We can't use the bus_generic_* versions of these methods because those 253 * methods always pass the bus param as the requesting device, and we need 254 * to pass the child (the i386 nexus knows about this and is prepared to 255 * deal). 256 */ 257int 258isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags, 259 void (*ihand)(void *), void *arg, void **cookiep) 260{ 261 return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags, 262 ihand, arg, cookiep)); 263} 264 265int 266isa_teardown_intr(device_t bus, device_t child, struct resource *r, 267 void *cookie) 268{ 269 return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie)); 270}
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