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