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