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