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 uint32_t acpi_resume_beep; 48 TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep); 49 SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep, 50 0, "Beep the PC speaker when resuming"); 51 52 uint32_t acpi_reset_video; 53 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video); 54 55 static int intr_model = ACPI_INTR_PIC; 56 57 int 58 acpi_machdep_init(device_t dev) 59 { 60 struct acpi_softc *sc; 61 62 sc = device_get_softc(dev); 63 64 acpi_apm_init(sc); 65 acpi_install_wakeup_handler(sc); 66 67 if (intr_model == ACPI_INTR_PIC) 68 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt, 69 INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW); 70 else 71 acpi_SetIntrModel(intr_model); 72 73 SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx, 74 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO, 75 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0, 76 "Call the VESA reset BIOS vector on the resume path"); 77 78 return (0); 79 } 80 81 void 82 acpi_SetDefaultIntrModel(int model) 83 { 84 85 intr_model = model; 86 } 87 88 /* Check BIOS date. If 1998 or older, disable ACPI. */ 89 int 90 acpi_machdep_quirks(int *quirks) 91 { 92 char *va; 93 int year; 94 95 /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */ 96 va = pmap_mapbios(0xffff0, 16); 97 sscanf(va + 11, "%2d", &year); 98 pmap_unmapbios((vm_offset_t)va, 16); 99 100 /* 101 * Date must be >= 1/1/1999 or we don't trust ACPI. Note that this 102 * check must be changed by my 114th birthday. 103 */ 104 if (year > 90 && year < 99) 105 *quirks = ACPI_Q_BROKEN; 106 107 return (0); 108 } 109 110 void 111 acpi_cpu_c1() 112 { 113 114 __asm __volatile("sti; hlt"); 115 } 116 117 /* 118 * Support for mapping ACPI tables during early boot. This abuses the 119 * crashdump map because the kernel cannot allocate KVA in 120 * pmap_mapbios() when this is used. This makes the following 121 * assumptions about how we use this KVA: pages 0 and 1 are used to 122 * map in the header of each table found via the RSDT or XSDT and 123 * pages 2 to n are used to map in the RSDT or XSDT. This has to use 124 * 2 pages for the table headers in case a header spans a page 125 * boundary. 126 * 127 * XXX: We don't ensure the table fits in the available address space 128 * in the crashdump map. 129 */ 130 131 /* 132 * Map some memory using the crashdump map. 'offset' is an offset in 133 * pages into the crashdump map to use for the start of the mapping. 134 */ 135 static void * 136 table_map(vm_paddr_t pa, int offset, vm_offset_t length) 137 { 138 vm_offset_t va, off; 139 void *data; 140 141 off = pa & PAGE_MASK; 142 length = round_page(length + off); 143 pa = pa & PG_FRAME; 144 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) + 145 (offset * PAGE_SIZE); 146 data = (void *)(va + off); 147 length -= PAGE_SIZE; 148 while (length > 0) { 149 va += PAGE_SIZE; 150 pa += PAGE_SIZE; 151 length -= PAGE_SIZE; 152 pmap_kenter(va, pa); 153 invlpg(va); 154 } 155 return (data); 156 } 157 158 /* Unmap memory previously mapped with table_map(). */ 159 static void 160 table_unmap(void *data, vm_offset_t length) 161 { 162 vm_offset_t va, off; 163 164 va = (vm_offset_t)data; 165 off = va & PAGE_MASK; 166 length = round_page(length + off); 167 va &= ~PAGE_MASK; 168 while (length > 0) { 169 pmap_kremove(va); 170 invlpg(va); 171 va += PAGE_SIZE; 172 length -= PAGE_SIZE; 173 } 174 } 175 176 /* 177 * Map a table at a given offset into the crashdump map. It first 178 * maps the header to determine the table length and then maps the 179 * entire table. 180 */ 181 static void * 182 map_table(vm_paddr_t pa, int offset, const char *sig) 183 { 184 ACPI_TABLE_HEADER *header; 185 vm_offset_t length; 186 void *table; 187 188 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER)); 189 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) { 190 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 191 return (NULL); 192 } 193 length = header->Length; 194 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 195 table = table_map(pa, offset, length); 196 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 197 if (bootverbose) 198 printf("ACPI: Failed checksum for table %s\n", sig); 199 #if (ACPI_CHECKSUM_ABORT) 200 table_unmap(table, length); 201 return (NULL); 202 #endif 203 } 204 return (table); 205 } 206 207 /* 208 * See if a given ACPI table is the requested table. Returns the 209 * length of the able if it matches or zero on failure. 210 */ 211 static int 212 probe_table(vm_paddr_t address, const char *sig) 213 { 214 ACPI_TABLE_HEADER *table; 215 216 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER)); 217 if (table == NULL) { 218 if (bootverbose) 219 printf("ACPI: Failed to map table at 0x%jx\n", 220 (uintmax_t)address); 221 return (0); 222 } 223 if (bootverbose) 224 printf("Table '%.4s' at 0x%jx\n", table->Signature, 225 (uintmax_t)address); 226 227 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) { 228 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 229 return (0); 230 } 231 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 232 return (1); 233 } 234 235 /* 236 * Try to map a table at a given physical address previously returned 237 * by acpi_find_table(). 238 */ 239 void * 240 acpi_map_table(vm_paddr_t pa, const char *sig) 241 { 242 243 return (map_table(pa, 0, sig)); 244 } 245 246 /* Unmap a table previously mapped via acpi_map_table(). */ 247 void 248 acpi_unmap_table(void *table) 249 { 250 ACPI_TABLE_HEADER *header; 251 252 header = (ACPI_TABLE_HEADER *)table; 253 table_unmap(table, header->Length); 254 } 255 256 /* 257 * Return the physical address of the requested table or zero if one 258 * is not found. 259 */ 260 vm_paddr_t 261 acpi_find_table(const char *sig) 262 { 263 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 264 ACPI_TABLE_RSDP *rsdp; 265 ACPI_TABLE_RSDT *rsdt; 266 ACPI_TABLE_XSDT *xsdt; 267 ACPI_TABLE_HEADER *table; 268 vm_paddr_t addr; 269 int i, count; 270 271 if (resource_disabled("acpi", 0)) 272 return (0); 273 274 /* 275 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 276 * calls pmap_mapbios() to find the RSDP, we assume that we can use 277 * pmap_mapbios() to map the RSDP. 278 */ 279 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 280 return (0); 281 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 282 if (rsdp == NULL) { 283 if (bootverbose) 284 printf("ACPI: Failed to map RSDP\n"); 285 return (0); 286 } 287 288 /* 289 * For ACPI >= 2.0, use the XSDT if it is available. 290 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2 291 * in the crashdump area. Pages 0 and 1 are used to map in the 292 * headers of candidate ACPI tables. 293 */ 294 addr = 0; 295 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 296 /* 297 * AcpiOsGetRootPointer only verifies the checksum for 298 * the version 1.0 portion of the RSDP. Version 2.0 has 299 * an additional checksum that we verify first. 300 */ 301 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 302 if (bootverbose) 303 printf("ACPI: RSDP failed extended checksum\n"); 304 return (0); 305 } 306 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT); 307 if (xsdt == NULL) { 308 if (bootverbose) 309 printf("ACPI: Failed to map XSDT\n"); 310 return (0); 311 } 312 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 313 sizeof(UINT64); 314 for (i = 0; i < count; i++) 315 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 316 addr = xsdt->TableOffsetEntry[i]; 317 break; 318 } 319 acpi_unmap_table(xsdt); 320 } else { 321 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT); 322 if (rsdt == NULL) { 323 if (bootverbose) 324 printf("ACPI: Failed to map RSDT\n"); 325 return (0); 326 } 327 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 328 sizeof(UINT32); 329 for (i = 0; i < count; i++) 330 if (probe_table(rsdt->TableOffsetEntry[i], sig)) { 331 addr = rsdt->TableOffsetEntry[i]; 332 break; 333 } 334 acpi_unmap_table(rsdt); 335 } 336 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 337 if (addr == 0) { 338 if (bootverbose) 339 printf("ACPI: No %s table found\n", sig); 340 return (0); 341 } 342 if (bootverbose) 343 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr); 344 345 /* 346 * Verify that we can map the full table and that its checksum is 347 * correct, etc. 348 */ 349 table = map_table(addr, 0, sig); 350 if (table == NULL) 351 return (0); 352 acpi_unmap_table(table); 353 354 return (addr); 355 } 356 357 /* 358 * ACPI nexus(4) driver. 359 */ 360 static int 361 nexus_acpi_probe(device_t dev) 362 { 363 int error; 364 365 error = acpi_identify(); 366 if (error) 367 return (error); 368 369 return (BUS_PROBE_DEFAULT); 370 } 371 372 static int 373 nexus_acpi_attach(device_t dev) 374 { 375 376 nexus_init_resources(); 377 bus_generic_probe(dev); 378 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL) 379 panic("failed to add acpi0 device"); 380 381 return (bus_generic_attach(dev)); 382 } 383 384 static device_method_t nexus_acpi_methods[] = { 385 /* Device interface */ 386 DEVMETHOD(device_probe, nexus_acpi_probe), 387 DEVMETHOD(device_attach, nexus_acpi_attach), 388 389 { 0, 0 } 390 }; 391 392 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); 393 static devclass_t nexus_devclass; 394 395 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0); 396