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 SYSCTL_DECL(_debug_acpi); 48 49 uint32_t acpi_resume_beep; 50 TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep); 51 SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep, 52 0, "Beep the PC speaker when resuming"); 53 54 uint32_t acpi_reset_video; 55 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video); 56 57 static int intr_model = ACPI_INTR_PIC; 58 59 int 60 acpi_machdep_init(device_t dev) 61 { 62 struct acpi_softc *sc; 63 64 sc = device_get_softc(dev); 65 66 acpi_apm_init(sc); 67 acpi_install_wakeup_handler(sc); 68 69 if (intr_model == ACPI_INTR_PIC) 70 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt, 71 INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW); 72 else 73 acpi_SetIntrModel(intr_model); 74 75 SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx, 76 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO, 77 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0, 78 "Call the VESA reset BIOS vector on the resume path"); 79 80 return (0); 81 } 82 83 void 84 acpi_SetDefaultIntrModel(int model) 85 { 86 87 intr_model = model; 88 } 89 90 /* Check BIOS date. If 1998 or older, disable ACPI. */ 91 int 92 acpi_machdep_quirks(int *quirks) 93 { 94 char *va; 95 int year; 96 97 /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */ 98 va = pmap_mapbios(0xffff0, 16); 99 sscanf(va + 11, "%2d", &year); 100 pmap_unmapbios((vm_offset_t)va, 16); 101 102 /* 103 * Date must be >= 1/1/1999 or we don't trust ACPI. Note that this 104 * check must be changed by my 114th birthday. 105 */ 106 if (year > 90 && year < 99) 107 *quirks = ACPI_Q_BROKEN; 108 109 return (0); 110 } 111 112 void 113 acpi_cpu_c1() 114 { 115 116 __asm __volatile("sti; hlt"); 117 } 118 119 /* 120 * Support for mapping ACPI tables during early boot. This abuses the 121 * crashdump map because the kernel cannot allocate KVA in 122 * pmap_mapbios() when this is used. This makes the following 123 * assumptions about how we use this KVA: pages 0 and 1 are used to 124 * map in the header of each table found via the RSDT or XSDT and 125 * pages 2 to n are used to map in the RSDT or XSDT. This has to use 126 * 2 pages for the table headers in case a header spans a page 127 * boundary. 128 * 129 * XXX: We don't ensure the table fits in the available address space 130 * in the crashdump map. 131 */ 132 133 /* 134 * Map some memory using the crashdump map. 'offset' is an offset in 135 * pages into the crashdump map to use for the start of the mapping. 136 */ 137 static void * 138 table_map(vm_paddr_t pa, int offset, vm_offset_t length) 139 { 140 vm_offset_t va, off; 141 void *data; 142 143 off = pa & PAGE_MASK; 144 length = roundup(length + off, PAGE_SIZE); 145 pa = pa & PG_FRAME; 146 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) + 147 (offset * PAGE_SIZE); 148 data = (void *)(va + off); 149 length -= PAGE_SIZE; 150 while (length > 0) { 151 va += PAGE_SIZE; 152 pa += PAGE_SIZE; 153 length -= PAGE_SIZE; 154 pmap_kenter(va, pa); 155 invlpg(va); 156 } 157 return (data); 158 } 159 160 /* Unmap memory previously mapped with table_map(). */ 161 static void 162 table_unmap(void *data, vm_offset_t length) 163 { 164 vm_offset_t va, off; 165 166 va = (vm_offset_t)data; 167 off = va & PAGE_MASK; 168 length = roundup(length + off, PAGE_SIZE); 169 va &= ~PAGE_MASK; 170 while (length > 0) { 171 pmap_kremove(va); 172 invlpg(va); 173 va += PAGE_SIZE; 174 length -= PAGE_SIZE; 175 } 176 } 177 178 /* 179 * Map a table at a given offset into the crashdump map. It first 180 * maps the header to determine the table length and then maps the 181 * entire table. 182 */ 183 static void * 184 map_table(vm_paddr_t pa, int offset, const char *sig) 185 { 186 ACPI_TABLE_HEADER *header; 187 vm_offset_t length; 188 void *table; 189 190 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER)); 191 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) { 192 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 193 return (NULL); 194 } 195 length = header->Length; 196 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 197 table = table_map(pa, offset, length); 198 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 199 if (bootverbose) 200 printf("ACPI: Failed checksum for table %s\n", sig); 201 #if (ACPI_CHECKSUM_ABORT) 202 table_unmap(table, length); 203 return (NULL); 204 #endif 205 } 206 return (table); 207 } 208 209 /* 210 * See if a given ACPI table is the requested table. Returns the 211 * length of the able if it matches or zero on failure. 212 */ 213 static int 214 probe_table(vm_paddr_t address, const char *sig) 215 { 216 ACPI_TABLE_HEADER *table; 217 218 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER)); 219 if (table == NULL) { 220 if (bootverbose) 221 printf("ACPI: Failed to map table at 0x%jx\n", 222 (uintmax_t)address); 223 return (0); 224 } 225 if (bootverbose) 226 printf("Table '%.4s' at 0x%jx\n", table->Signature, 227 (uintmax_t)address); 228 229 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) { 230 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 231 return (0); 232 } 233 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 234 return (1); 235 } 236 237 /* 238 * Try to map a table at a given physical address previously returned 239 * by acpi_find_table(). 240 */ 241 void * 242 acpi_map_table(vm_paddr_t pa, const char *sig) 243 { 244 245 return (map_table(pa, 0, sig)); 246 } 247 248 /* Unmap a table previously mapped via acpi_map_table(). */ 249 void 250 acpi_unmap_table(void *table) 251 { 252 ACPI_TABLE_HEADER *header; 253 254 header = (ACPI_TABLE_HEADER *)table; 255 table_unmap(table, header->Length); 256 } 257 258 /* 259 * Return the physical address of the requested table or zero if one 260 * is not found. 261 */ 262 vm_paddr_t 263 acpi_find_table(const char *sig) 264 { 265 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 266 ACPI_TABLE_RSDP *rsdp; 267 ACPI_TABLE_RSDT *rsdt; 268 ACPI_TABLE_XSDT *xsdt; 269 ACPI_TABLE_HEADER *table; 270 vm_paddr_t addr; 271 int i, count; 272 273 if (resource_disabled("acpi", 0)) 274 return (0); 275 276 /* 277 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 278 * calls pmap_mapbios() to find the RSDP, we assume that we can use 279 * pmap_mapbios() to map the RSDP. 280 */ 281 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 282 return (0); 283 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 284 if (rsdp == NULL) { 285 if (bootverbose) 286 printf("ACPI: Failed to map RSDP\n"); 287 return (0); 288 } 289 290 /* 291 * For ACPI >= 2.0, use the XSDT if it is available. 292 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2 293 * in the crashdump area. Pages 0 and 1 are used to map in the 294 * headers of candidate ACPI tables. 295 */ 296 addr = 0; 297 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 298 /* 299 * AcpiOsGetRootPointer only verifies the checksum for 300 * the version 1.0 portion of the RSDP. Version 2.0 has 301 * an additional checksum that we verify first. 302 */ 303 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 304 if (bootverbose) 305 printf("ACPI: RSDP failed extended checksum\n"); 306 return (0); 307 } 308 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT); 309 if (xsdt == NULL) { 310 if (bootverbose) 311 printf("ACPI: Failed to map XSDT\n"); 312 return (0); 313 } 314 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 315 sizeof(UINT64); 316 for (i = 0; i < count; i++) 317 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 318 addr = xsdt->TableOffsetEntry[i]; 319 break; 320 } 321 acpi_unmap_table(xsdt); 322 } else { 323 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT); 324 if (rsdt == NULL) { 325 if (bootverbose) 326 printf("ACPI: Failed to map RSDT\n"); 327 return (0); 328 } 329 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 330 sizeof(UINT32); 331 for (i = 0; i < count; i++) 332 if (probe_table(rsdt->TableOffsetEntry[i], sig)) { 333 addr = rsdt->TableOffsetEntry[i]; 334 break; 335 } 336 acpi_unmap_table(rsdt); 337 } 338 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 339 if (addr == 0) { 340 if (bootverbose) 341 printf("ACPI: No %s table found\n", sig); 342 return (0); 343 } 344 if (bootverbose) 345 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr); 346 347 /* 348 * Verify that we can map the full table and that its checksum is 349 * correct, etc. 350 */ 351 table = map_table(addr, 0, sig); 352 if (table == NULL) 353 return (0); 354 acpi_unmap_table(table); 355 356 return (addr); 357 } 358 359 /* 360 * ACPI nexus(4) driver. 361 */ 362 static int 363 nexus_acpi_probe(device_t dev) 364 { 365 int error; 366 367 error = acpi_identify(); 368 if (error) 369 return (error); 370 371 return (BUS_PROBE_DEFAULT); 372 } 373 374 static int 375 nexus_acpi_attach(device_t dev) 376 { 377 378 nexus_init_resources(); 379 bus_generic_probe(dev); 380 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL) 381 panic("failed to add acpi0 device"); 382 383 return (bus_generic_attach(dev)); 384 } 385 386 static device_method_t nexus_acpi_methods[] = { 387 /* Device interface */ 388 DEVMETHOD(device_probe, nexus_acpi_probe), 389 DEVMETHOD(device_attach, nexus_acpi_attach), 390 391 { 0, 0 } 392 }; 393 394 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); 395 static devclass_t nexus_devclass; 396 397 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0); 398