isa.c revision 127146
1/*- 2 * Copyright (c) 1998 Doug Rabson 3 * Copyright (c) 2001 Thomas Moestl <tmm@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * from: FreeBSD: src/sys/alpha/isa/isa.c,v 1.26 2001/07/11 28 * 29 * $FreeBSD: head/sys/sparc64/isa/isa.c 127146 2004-03-17 21:45:55Z jmg $ 30 */ 31 32#include "opt_ofw_pci.h" 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/kernel.h> 37#include <sys/module.h> 38#include <sys/bus.h> 39#include <machine/bus.h> 40#include <sys/malloc.h> 41#include <sys/proc.h> 42#include <sys/rman.h> 43#include <sys/interrupt.h> 44 45#include <isa/isareg.h> 46#include <isa/isavar.h> 47#include <isa/isa_common.h> 48 49#include <dev/pci/pcireg.h> 50#include <dev/pci/pcivar.h> 51 52#include <dev/ofw/ofw_pci.h> 53#include <dev/ofw/openfirm.h> 54 55#include <machine/intr_machdep.h> 56#include <machine/ofw_bus.h> 57#include <machine/resource.h> 58 59#include <sparc64/pci/ofw_pci.h> 60#include <sparc64/isa/ofw_isa.h> 61 62/* There can be only one ISA bus, so it is safe to use globals. */ 63bus_space_tag_t isa_io_bt = NULL; 64bus_space_handle_t isa_io_hdl; 65bus_space_tag_t isa_mem_bt = NULL; 66bus_space_handle_t isa_mem_hdl; 67 68u_int64_t isa_io_base; 69u_int64_t isa_io_limit; 70u_int64_t isa_mem_base; 71u_int64_t isa_mem_limit; 72 73device_t isa_bus_device; 74 75static phandle_t isab_node; 76static ofw_pci_intr_t isa_ino[8]; 77 78#ifdef OFW_NEWPCI 79struct ofw_bus_iinfo isa_iinfo; 80#endif 81 82/* 83 * XXX: This is really partly partly PCI-specific, but unfortunately is 84 * differently enough to have to duplicate it here... 85 */ 86#define ISAB_RANGE_PHYS(r) \ 87 (((u_int64_t)(r)->phys_mid << 32) | (u_int64_t)(r)->phys_lo) 88#define ISAB_RANGE_SPACE(r) (((r)->phys_hi >> 24) & 0x03) 89 90#define ISAR_SPACE_IO 0x01 91#define ISAR_SPACE_MEM 0x02 92 93#define INRANGE(x, start, end) ((x) >= (start) && (x) <= (end)) 94 95static int isa_route_intr_res(device_t, u_long, u_long); 96 97intrmask_t 98isa_irq_pending(void) 99{ 100 intrmask_t pending; 101 int i; 102 103 /* XXX: Is this correct? */ 104 for (i = 7, pending = 0; i >= 0; i--) { 105 pending <<= 1; 106 if (isa_ino[i] != PCI_INVALID_IRQ) { 107 pending |= (OFW_PCI_INTR_PENDING(isa_bus_device, 108 isa_ino[i]) == 0) ? 0 : 1; 109 } 110 } 111 return (pending); 112} 113 114void 115isa_init(device_t dev) 116{ 117 device_t bridge; 118 phandle_t node; 119 ofw_isa_intr_t ino; 120#ifndef OFW_NEWPCI 121 ofw_pci_intr_t rino; 122#endif 123 struct isa_ranges *br; 124 int nbr, i; 125 126 /* The parent of the bus must be a PCI-ISA bridge. */ 127 bridge = device_get_parent(dev); 128#ifdef OFW_NEWPCI 129 isab_node = ofw_pci_get_node(bridge); 130#else 131 isab_node = ofw_pci_node(bridge); 132#endif 133 nbr = OF_getprop_alloc(isab_node, "ranges", sizeof(*br), (void **)&br); 134 if (nbr <= 0) 135 panic("isa_init: cannot get bridge range property"); 136 137#ifdef OFW_NEWPCI 138 ofw_bus_setup_iinfo(isab_node, &isa_iinfo, sizeof(ofw_isa_intr_t)); 139#endif 140 141 /* 142 * This is really a bad kludge; however, it is needed to provide 143 * isa_irq_pending(), which is unfortunately still used by some 144 * drivers. 145 */ 146 for (i = 0; i < 8; i++) 147 isa_ino[i] = PCI_INVALID_IRQ; 148 for (node = OF_child(isab_node); node != 0; node = OF_peer(node)) { 149 if (OF_getprop(node, "interrupts", &ino, sizeof(ino)) == -1) 150 continue; 151 if (ino > 7) 152 panic("isa_init: XXX: ino too large"); 153#ifdef OFW_NEWPCI 154 isa_ino[ino] = ofw_isa_route_intr(bridge, node, &isa_iinfo, 155 ino); 156#else 157 rino = ofw_bus_route_intr(node, ino, ofw_pci_orb_callback, dev); 158 isa_ino[ino] = rino == ORIR_NOTFOUND ? PCI_INVALID_IRQ : rino; 159#endif 160 } 161 162 for (nbr -= 1; nbr >= 0; nbr--) { 163 switch(ISAB_RANGE_SPACE(br + nbr)) { 164 case ISAR_SPACE_IO: 165 /* This is probably always 0. */ 166 isa_io_base = ISAB_RANGE_PHYS(&br[nbr]); 167 isa_io_limit = br[nbr].size; 168 isa_io_hdl = OFW_PCI_GET_BUS_HANDLE(bridge, 169 SYS_RES_IOPORT, isa_io_base, &isa_io_bt); 170 break; 171 case ISAR_SPACE_MEM: 172 /* This is probably always 0. */ 173 isa_mem_base = ISAB_RANGE_PHYS(&br[nbr]); 174 isa_mem_limit = br[nbr].size; 175 isa_mem_hdl = OFW_PCI_GET_BUS_HANDLE(bridge, 176 SYS_RES_MEMORY, isa_mem_base, &isa_mem_bt); 177 break; 178 } 179 } 180 free(br, M_OFWPROP); 181} 182 183static int 184isa_route_intr_res(device_t bus, u_long start, u_long end) 185{ 186 int res; 187 188 if (start != end) { 189 panic("isa_route_intr_res: allocation of interrupt range not " 190 "supported (0x%lx - 0x%lx)", start, end); 191 } 192 if (start > 7) 193 panic("isa_route_intr_res: start out of isa range"); 194 res = isa_ino[start]; 195 if (res == PCI_INVALID_IRQ) 196 device_printf(bus, "could not map interrupt %d\n", res); 197 return (res); 198} 199 200struct resource * 201isa_alloc_resource(device_t bus, device_t child, int type, int *rid, 202 u_long start, u_long end, u_long count, u_int flags) 203{ 204 /* 205 * Consider adding a resource definition. 206 */ 207 int passthrough = (device_get_parent(child) != bus); 208 int isdefault = (start == 0UL && end == ~0UL); 209 struct isa_device* idev = DEVTOISA(child); 210 struct resource_list *rl = &idev->id_resources; 211 struct resource_list_entry *rle; 212 u_long base, limit; 213 214 if (!passthrough && !isdefault) { 215 rle = resource_list_find(rl, type, *rid); 216 if (!rle) { 217 if (*rid < 0) 218 return 0; 219 switch (type) { 220 case SYS_RES_IRQ: 221 if (*rid >= ISA_NIRQ) 222 return 0; 223 break; 224 case SYS_RES_DRQ: 225 if (*rid >= ISA_NDRQ) 226 return 0; 227 break; 228 case SYS_RES_MEMORY: 229 if (*rid >= ISA_NMEM) 230 return 0; 231 break; 232 case SYS_RES_IOPORT: 233 if (*rid >= ISA_NPORT) 234 return 0; 235 break; 236 default: 237 return 0; 238 } 239 resource_list_add(rl, type, *rid, start, end, count); 240 } 241 } 242 243 /* 244 * Add the base, change default allocations to be between base and 245 * limit, and reject allocations if a resource type is not enabled. 246 */ 247 base = limit = 0; 248 switch(type) { 249 case SYS_RES_MEMORY: 250 if (isa_mem_bt == NULL) 251 return (NULL); 252 base = isa_mem_base; 253 limit = base + isa_mem_limit; 254 break; 255 case SYS_RES_IOPORT: 256 if (isa_io_bt == NULL) 257 return (NULL); 258 base = isa_io_base; 259 limit = base + isa_io_limit; 260 break; 261 case SYS_RES_IRQ: 262 if (isdefault && passthrough) 263 panic("isa_alloc_resource: cannot pass through default " 264 "irq allocation"); 265 if (!isdefault) { 266 start = end = isa_route_intr_res(bus, start, end); 267 if (start == PCI_INVALID_IRQ) 268 return (NULL); 269 } 270 break; 271 default: 272 panic("isa_alloc_resource: unsupported resource type %d", type); 273 } 274 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 275 start = ulmin(start + base, limit); 276 end = ulmin(end + base, limit); 277 } 278 279 /* 280 * This inlines a modified resource_list_alloc(); this is needed 281 * because the resources need to have offsets added to them, which 282 * cannot be done beforehand without patching the resource list entries 283 * (which is ugly). 284 */ 285 if (passthrough) { 286 return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 287 type, rid, start, end, count, flags)); 288 } 289 290 rle = resource_list_find(rl, type, *rid); 291 if (rle == NULL) 292 return (NULL); /* no resource of that type/rid */ 293 294 if (rle->res != NULL) 295 panic("isa_alloc_resource: resource entry is busy"); 296 297 if (isdefault) { 298 start = rle->start; 299 count = ulmax(count, rle->count); 300 end = ulmax(rle->end, start + count - 1); 301 switch (type) { 302 case SYS_RES_MEMORY: 303 case SYS_RES_IOPORT: 304 start += base; 305 end += base; 306 if (!INRANGE(start, base, limit) || 307 !INRANGE(end, base, limit)) 308 return (NULL); 309 break; 310 case SYS_RES_IRQ: 311 start = end = isa_route_intr_res(bus, start, end); 312 if (start == PCI_INVALID_IRQ) 313 return (NULL); 314 break; 315 } 316 } 317 318 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 319 type, rid, start, end, count, flags); 320 321 /* 322 * Record the new range. 323 */ 324 if (rle->res != NULL) { 325 rle->start = rman_get_start(rle->res) - base; 326 rle->end = rman_get_end(rle->res) - base; 327 rle->count = count; 328 } 329 330 return (rle->res); 331} 332 333int 334isa_release_resource(device_t bus, device_t child, int type, int rid, 335 struct resource *res) 336{ 337 struct isa_device* idev = DEVTOISA(child); 338 struct resource_list *rl = &idev->id_resources; 339 340 return (resource_list_release(rl, bus, child, type, rid, res)); 341} 342 343int 344isa_setup_intr(device_t dev, device_t child, 345 struct resource *irq, int flags, 346 driver_intr_t *intr, void *arg, void **cookiep) 347{ 348 349 /* 350 * Just pass through. This is going to be handled by either one of 351 * the parent PCI buses or the nexus device. 352 * The interrupt was routed at allocation time. 353 */ 354 return (BUS_SETUP_INTR(device_get_parent(dev), child, irq, flags, intr, 355 arg, cookiep)); 356} 357 358int 359isa_teardown_intr(device_t dev, device_t child, 360 struct resource *irq, void *cookie) 361{ 362 363 return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, irq, cookie)); 364} 365