1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 Mitsuru IWASAKI 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/sysctl.h> 37 38 #include <vm/vm.h> 39 #include <vm/pmap.h> 40 41 #include <contrib/dev/acpica/include/acpi.h> 42 #include <contrib/dev/acpica/include/accommon.h> 43 #include <contrib/dev/acpica/include/actables.h> 44 45 #include <dev/acpica/acpivar.h> 46 47 #include <machine/nexusvar.h> 48 49 uint32_t acpi_resume_beep; 50 SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN, &acpi_resume_beep, 51 0, "Beep the PC speaker when resuming"); 52 53 uint32_t acpi_reset_video; 54 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video); 55 56 static int intr_model = ACPI_INTR_PIC; 57 58 int 59 acpi_machdep_init(device_t dev) 60 { 61 struct acpi_softc *sc; 62 63 sc = device_get_softc(dev); 64 65 acpi_apm_init(sc); 66 acpi_install_wakeup_handler(sc); 67 68 if (intr_model == ACPI_INTR_PIC) 69 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt, 70 INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW); 71 else 72 acpi_SetIntrModel(intr_model); 73 74 SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx, 75 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO, 76 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0, 77 "Call the VESA reset BIOS vector on the resume path"); 78 79 return (0); 80 } 81 82 void 83 acpi_SetDefaultIntrModel(int model) 84 { 85 86 intr_model = model; 87 } 88 89 /* Check BIOS date. If 1998 or older, disable ACPI. */ 90 int 91 acpi_machdep_quirks(int *quirks) 92 { 93 char *va; 94 int year; 95 96 /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */ 97 va = pmap_mapbios(0xffff0, 16); 98 sscanf(va + 11, "%2d", &year); 99 pmap_unmapbios((vm_offset_t)va, 16); 100 101 /* 102 * Date must be >= 1/1/1999 or we don't trust ACPI. Note that this 103 * check must be changed by my 114th birthday. 104 */ 105 if (year > 90 && year < 99) 106 *quirks = ACPI_Q_BROKEN; 107 108 return (0); 109 } 110 111 /* 112 * Support for mapping ACPI tables during early boot. This abuses the 113 * crashdump map because the kernel cannot allocate KVA in 114 * pmap_mapbios() when this is used. This makes the following 115 * assumptions about how we use this KVA: pages 0 and 1 are used to 116 * map in the header of each table found via the RSDT or XSDT and 117 * pages 2 to n are used to map in the RSDT or XSDT. This has to use 118 * 2 pages for the table headers in case a header spans a page 119 * boundary. 120 * 121 * XXX: We don't ensure the table fits in the available address space 122 * in the crashdump map. 123 */ 124 125 /* 126 * Map some memory using the crashdump map. 'offset' is an offset in 127 * pages into the crashdump map to use for the start of the mapping. 128 */ 129 static void * 130 table_map(vm_paddr_t pa, int offset, vm_offset_t length) 131 { 132 vm_offset_t va, off; 133 void *data; 134 135 off = pa & PAGE_MASK; 136 length = round_page(length + off); 137 pa = pmap_pg_frame(pa); 138 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) + 139 (offset * PAGE_SIZE); 140 data = (void *)(va + off); 141 length -= PAGE_SIZE; 142 while (length > 0) { 143 va += PAGE_SIZE; 144 pa += PAGE_SIZE; 145 length -= PAGE_SIZE; 146 pmap_kenter(va, pa); 147 invlpg(va); 148 } 149 return (data); 150 } 151 152 /* Unmap memory previously mapped with table_map(). */ 153 static void 154 table_unmap(void *data, vm_offset_t length) 155 { 156 vm_offset_t va, off; 157 158 va = (vm_offset_t)data; 159 off = va & PAGE_MASK; 160 length = round_page(length + off); 161 va &= ~PAGE_MASK; 162 while (length > 0) { 163 pmap_kremove(va); 164 invlpg(va); 165 va += PAGE_SIZE; 166 length -= PAGE_SIZE; 167 } 168 } 169 170 /* 171 * Map a table at a given offset into the crashdump map. It first 172 * maps the header to determine the table length and then maps the 173 * entire table. 174 */ 175 static void * 176 map_table(vm_paddr_t pa, int offset, const char *sig) 177 { 178 ACPI_TABLE_HEADER *header; 179 vm_offset_t length; 180 void *table; 181 182 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER)); 183 if (strncmp(header->Signature, sig, ACPI_NAMESEG_SIZE) != 0) { 184 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 185 return (NULL); 186 } 187 length = header->Length; 188 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 189 table = table_map(pa, offset, length); 190 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 191 if (bootverbose) 192 printf("ACPI: Failed checksum for table %s\n", sig); 193 #if (ACPI_CHECKSUM_ABORT) 194 table_unmap(table, length); 195 return (NULL); 196 #endif 197 } 198 return (table); 199 } 200 201 /* 202 * See if a given ACPI table is the requested table. Returns the 203 * length of the able if it matches or zero on failure. 204 */ 205 static int 206 probe_table(vm_paddr_t address, const char *sig) 207 { 208 ACPI_TABLE_HEADER *table; 209 210 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER)); 211 if (table == NULL) { 212 if (bootverbose) 213 printf("ACPI: Failed to map table at 0x%jx\n", 214 (uintmax_t)address); 215 return (0); 216 } 217 if (bootverbose) 218 printf("Table '%.4s' at 0x%jx\n", table->Signature, 219 (uintmax_t)address); 220 221 if (strncmp(table->Signature, sig, ACPI_NAMESEG_SIZE) != 0) { 222 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 223 return (0); 224 } 225 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 226 return (1); 227 } 228 229 /* 230 * Try to map a table at a given physical address previously returned 231 * by acpi_find_table(). 232 */ 233 void * 234 acpi_map_table(vm_paddr_t pa, const char *sig) 235 { 236 237 return (map_table(pa, 0, sig)); 238 } 239 240 /* Unmap a table previously mapped via acpi_map_table(). */ 241 void 242 acpi_unmap_table(void *table) 243 { 244 ACPI_TABLE_HEADER *header; 245 246 header = (ACPI_TABLE_HEADER *)table; 247 table_unmap(table, header->Length); 248 } 249 250 /* 251 * Return the physical address of the requested table or zero if one 252 * is not found. 253 */ 254 vm_paddr_t 255 acpi_find_table(const char *sig) 256 { 257 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 258 ACPI_TABLE_RSDP *rsdp; 259 ACPI_TABLE_RSDT *rsdt; 260 ACPI_TABLE_XSDT *xsdt; 261 ACPI_TABLE_HEADER *table; 262 vm_paddr_t addr; 263 int i, count; 264 265 if (resource_disabled("acpi", 0)) 266 return (0); 267 268 /* 269 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 270 * calls pmap_mapbios() to find the RSDP, we assume that we can use 271 * pmap_mapbios() to map the RSDP. 272 */ 273 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 274 return (0); 275 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 276 if (rsdp == NULL) { 277 if (bootverbose) 278 printf("ACPI: Failed to map RSDP\n"); 279 return (0); 280 } 281 282 /* 283 * For ACPI >= 2.0, use the XSDT if it is available. 284 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2 285 * in the crashdump area. Pages 0 and 1 are used to map in the 286 * headers of candidate ACPI tables. 287 */ 288 addr = 0; 289 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 290 /* 291 * AcpiOsGetRootPointer only verifies the checksum for 292 * the version 1.0 portion of the RSDP. Version 2.0 has 293 * an additional checksum that we verify first. 294 */ 295 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 296 if (bootverbose) 297 printf("ACPI: RSDP failed extended checksum\n"); 298 return (0); 299 } 300 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT); 301 if (xsdt == NULL) { 302 if (bootverbose) 303 printf("ACPI: Failed to map XSDT\n"); 304 return (0); 305 } 306 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 307 sizeof(UINT64); 308 for (i = 0; i < count; i++) 309 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 310 addr = xsdt->TableOffsetEntry[i]; 311 break; 312 } 313 acpi_unmap_table(xsdt); 314 } else { 315 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT); 316 if (rsdt == NULL) { 317 if (bootverbose) 318 printf("ACPI: Failed to map RSDT\n"); 319 return (0); 320 } 321 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 322 sizeof(UINT32); 323 for (i = 0; i < count; i++) 324 if (probe_table(rsdt->TableOffsetEntry[i], sig)) { 325 addr = rsdt->TableOffsetEntry[i]; 326 break; 327 } 328 acpi_unmap_table(rsdt); 329 } 330 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 331 if (addr == 0) { 332 if (bootverbose) 333 printf("ACPI: No %s table found\n", sig); 334 return (0); 335 } 336 if (bootverbose) 337 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr); 338 339 /* 340 * Verify that we can map the full table and that its checksum is 341 * correct, etc. 342 */ 343 table = map_table(addr, 0, sig); 344 if (table == NULL) 345 return (0); 346 acpi_unmap_table(table); 347 348 return (addr); 349 } 350 351 /* 352 * ACPI nexus(4) driver. 353 */ 354 static int 355 nexus_acpi_probe(device_t dev) 356 { 357 int error; 358 359 error = acpi_identify(); 360 if (error) 361 return (error); 362 363 return (BUS_PROBE_DEFAULT); 364 } 365 366 static int 367 nexus_acpi_attach(device_t dev) 368 { 369 370 nexus_init_resources(); 371 bus_generic_probe(dev); 372 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL) 373 panic("failed to add acpi0 device"); 374 375 return (bus_generic_attach(dev)); 376 } 377 378 static device_method_t nexus_acpi_methods[] = { 379 /* Device interface */ 380 DEVMETHOD(device_probe, nexus_acpi_probe), 381 DEVMETHOD(device_attach, nexus_acpi_attach), 382 383 { 0, 0 } 384 }; 385 386 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); 387 static devclass_t nexus_devclass; 388 389 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0); 390