1 /*- 2 * Copyright (c) 2001 Mitsuru IWASAKI 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/bus.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/sysctl.h> 35 36 #include <vm/vm.h> 37 #include <vm/pmap.h> 38 39 #include <contrib/dev/acpica/include/acpi.h> 40 #include <contrib/dev/acpica/include/accommon.h> 41 #include <contrib/dev/acpica/include/actables.h> 42 43 #include <dev/acpica/acpivar.h> 44 45 #include <machine/nexusvar.h> 46 47 int acpi_resume_beep; 48 SYSCTL_INT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN, 49 &acpi_resume_beep, 0, "Beep the PC speaker when resuming"); 50 51 int acpi_reset_video; 52 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video); 53 54 static int intr_model = ACPI_INTR_PIC; 55 56 int 57 acpi_machdep_init(device_t dev) 58 { 59 struct acpi_softc *sc; 60 61 sc = device_get_softc(dev); 62 63 acpi_apm_init(sc); 64 65 if (intr_model != ACPI_INTR_PIC) 66 acpi_SetIntrModel(intr_model); 67 68 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, 69 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO, 70 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0, 71 "Call the VESA reset BIOS vector on the resume path"); 72 73 return (0); 74 } 75 76 void 77 acpi_SetDefaultIntrModel(int model) 78 { 79 80 intr_model = model; 81 } 82 83 int 84 acpi_machdep_quirks(int *quirks) 85 { 86 87 return (0); 88 } 89 90 /* 91 * Support for mapping ACPI tables during early boot. Currently this 92 * uses the crashdump map to map each table. However, the crashdump 93 * map is created in pmap_bootstrap() right after the direct map, so 94 * we should be able to just use pmap_mapbios() here instead. 95 * 96 * This makes the following assumptions about how we use this KVA: 97 * pages 0 and 1 are used to map in the header of each table found via 98 * the RSDT or XSDT and pages 2 to n are used to map in the RSDT or 99 * XSDT. This has to use 2 pages for the table headers in case a 100 * header spans a page boundary. 101 * 102 * XXX: We don't ensure the table fits in the available address space 103 * in the crashdump map. 104 */ 105 106 /* 107 * Map some memory using the crashdump map. 'offset' is an offset in 108 * pages into the crashdump map to use for the start of the mapping. 109 */ 110 static void * 111 table_map(vm_paddr_t pa, int offset, vm_offset_t length) 112 { 113 vm_offset_t va, off; 114 void *data; 115 116 off = pa & PAGE_MASK; 117 length = round_page(length + off); 118 pa = pa & PG_FRAME; 119 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) + 120 (offset * PAGE_SIZE); 121 data = (void *)(va + off); 122 length -= PAGE_SIZE; 123 while (length > 0) { 124 va += PAGE_SIZE; 125 pa += PAGE_SIZE; 126 length -= PAGE_SIZE; 127 pmap_kenter(va, pa); 128 invlpg(va); 129 } 130 return (data); 131 } 132 133 /* Unmap memory previously mapped with table_map(). */ 134 static void 135 table_unmap(void *data, vm_offset_t length) 136 { 137 vm_offset_t va, off; 138 139 va = (vm_offset_t)data; 140 off = va & PAGE_MASK; 141 length = round_page(length + off); 142 va &= ~PAGE_MASK; 143 while (length > 0) { 144 pmap_kremove(va); 145 invlpg(va); 146 va += PAGE_SIZE; 147 length -= PAGE_SIZE; 148 } 149 } 150 151 /* 152 * Map a table at a given offset into the crashdump map. It first 153 * maps the header to determine the table length and then maps the 154 * entire table. 155 */ 156 static void * 157 map_table(vm_paddr_t pa, int offset, const char *sig) 158 { 159 ACPI_TABLE_HEADER *header; 160 vm_offset_t length; 161 void *table; 162 163 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER)); 164 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) { 165 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 166 return (NULL); 167 } 168 length = header->Length; 169 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 170 table = table_map(pa, offset, length); 171 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 172 if (bootverbose) 173 printf("ACPI: Failed checksum for table %s\n", sig); 174 #if (ACPI_CHECKSUM_ABORT) 175 table_unmap(table, length); 176 return (NULL); 177 #endif 178 } 179 return (table); 180 } 181 182 /* 183 * See if a given ACPI table is the requested table. Returns the 184 * length of the able if it matches or zero on failure. 185 */ 186 static int 187 probe_table(vm_paddr_t address, const char *sig) 188 { 189 ACPI_TABLE_HEADER *table; 190 191 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER)); 192 if (table == NULL) { 193 if (bootverbose) 194 printf("ACPI: Failed to map table at 0x%jx\n", 195 (uintmax_t)address); 196 return (0); 197 } 198 if (bootverbose) 199 printf("Table '%.4s' at 0x%jx\n", table->Signature, 200 (uintmax_t)address); 201 202 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) { 203 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 204 return (0); 205 } 206 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 207 return (1); 208 } 209 210 /* 211 * Try to map a table at a given physical address previously returned 212 * by acpi_find_table(). 213 */ 214 void * 215 acpi_map_table(vm_paddr_t pa, const char *sig) 216 { 217 218 return (map_table(pa, 0, sig)); 219 } 220 221 /* Unmap a table previously mapped via acpi_map_table(). */ 222 void 223 acpi_unmap_table(void *table) 224 { 225 ACPI_TABLE_HEADER *header; 226 227 header = (ACPI_TABLE_HEADER *)table; 228 table_unmap(table, header->Length); 229 } 230 231 /* 232 * Return the physical address of the requested table or zero if one 233 * is not found. 234 */ 235 vm_paddr_t 236 acpi_find_table(const char *sig) 237 { 238 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 239 ACPI_TABLE_RSDP *rsdp; 240 ACPI_TABLE_RSDT *rsdt; 241 ACPI_TABLE_XSDT *xsdt; 242 ACPI_TABLE_HEADER *table; 243 vm_paddr_t addr; 244 int i, count; 245 246 if (resource_disabled("acpi", 0)) 247 return (0); 248 249 /* 250 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 251 * calls pmap_mapbios() to find the RSDP, we assume that we can use 252 * pmap_mapbios() to map the RSDP. 253 */ 254 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 255 return (0); 256 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 257 if (rsdp == NULL) { 258 if (bootverbose) 259 printf("ACPI: Failed to map RSDP\n"); 260 return (0); 261 } 262 263 /* 264 * For ACPI >= 2.0, use the XSDT if it is available. 265 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2 266 * in the crashdump area. Pages 0 and 1 are used to map in the 267 * headers of candidate ACPI tables. 268 */ 269 addr = 0; 270 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 271 /* 272 * AcpiOsGetRootPointer only verifies the checksum for 273 * the version 1.0 portion of the RSDP. Version 2.0 has 274 * an additional checksum that we verify first. 275 */ 276 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 277 if (bootverbose) 278 printf("ACPI: RSDP failed extended checksum\n"); 279 return (0); 280 } 281 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT); 282 if (xsdt == NULL) { 283 if (bootverbose) 284 printf("ACPI: Failed to map XSDT\n"); 285 return (0); 286 } 287 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 288 sizeof(UINT64); 289 for (i = 0; i < count; i++) 290 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 291 addr = xsdt->TableOffsetEntry[i]; 292 break; 293 } 294 acpi_unmap_table(xsdt); 295 } else { 296 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT); 297 if (rsdt == NULL) { 298 if (bootverbose) 299 printf("ACPI: Failed to map RSDT\n"); 300 return (0); 301 } 302 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 303 sizeof(UINT32); 304 for (i = 0; i < count; i++) 305 if (probe_table(rsdt->TableOffsetEntry[i], sig)) { 306 addr = rsdt->TableOffsetEntry[i]; 307 break; 308 } 309 acpi_unmap_table(rsdt); 310 } 311 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 312 if (addr == 0) { 313 if (bootverbose) 314 printf("ACPI: No %s table found\n", sig); 315 return (0); 316 } 317 if (bootverbose) 318 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr); 319 320 /* 321 * Verify that we can map the full table and that its checksum is 322 * correct, etc. 323 */ 324 table = map_table(addr, 0, sig); 325 if (table == NULL) 326 return (0); 327 acpi_unmap_table(table); 328 329 return (addr); 330 } 331 332 /* 333 * ACPI nexus(4) driver. 334 */ 335 static int 336 nexus_acpi_probe(device_t dev) 337 { 338 int error; 339 340 error = acpi_identify(); 341 if (error) 342 return (error); 343 344 return (BUS_PROBE_DEFAULT); 345 } 346 347 static int 348 nexus_acpi_attach(device_t dev) 349 { 350 device_t acpi_dev; 351 int error; 352 353 nexus_init_resources(); 354 bus_generic_probe(dev); 355 acpi_dev = BUS_ADD_CHILD(dev, 10, "acpi", 0); 356 if (acpi_dev == NULL) 357 panic("failed to add acpi0 device"); 358 359 error = bus_generic_attach(dev); 360 if (error == 0) 361 acpi_install_wakeup_handler(device_get_softc(acpi_dev)); 362 363 return (error); 364 } 365 366 static device_method_t nexus_acpi_methods[] = { 367 /* Device interface */ 368 DEVMETHOD(device_probe, nexus_acpi_probe), 369 DEVMETHOD(device_attach, nexus_acpi_attach), 370 371 { 0, 0 } 372 }; 373 374 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); 375 static devclass_t nexus_devclass; 376 377 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0); 378