acpi_machdep.c revision 215072
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: head/sys/amd64/acpica/acpi_machdep.c 215072 2010-11-10 01:29:56Z jkim $"); 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 47SYSCTL_DECL(_debug_acpi); 48 49int acpi_resume_beep; 50TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep); 51SYSCTL_INT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep, 52 0, "Beep the PC speaker when resuming"); 53 54int acpi_reset_video; 55TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video); 56 57static int intr_model = ACPI_INTR_PIC; 58 59int 60acpi_machdep_init(device_t dev) 61{ 62 struct acpi_softc *sc; 63 64 sc = devclass_get_softc(devclass_find("acpi"), 0); 65 66 /* Create a clone for /dev/acpi also. */ 67 sc->acpi_clone = acpi_apm_create_clone(sc->acpi_dev_t, sc); 68 69 if (intr_model != ACPI_INTR_PIC) 70 acpi_SetIntrModel(intr_model); 71 72 SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx, 73 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO, 74 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0, 75 "Call the VESA reset BIOS vector on the resume path"); 76 77 return (0); 78} 79 80void 81acpi_SetDefaultIntrModel(int model) 82{ 83 84 intr_model = model; 85} 86 87int 88acpi_machdep_quirks(int *quirks) 89{ 90 91 return (0); 92} 93 94void 95acpi_cpu_c1() 96{ 97 98 __asm __volatile("sti; hlt"); 99} 100 101/* 102 * Support for mapping ACPI tables during early boot. Currently this 103 * uses the crashdump map to map each table. However, the crashdump 104 * map is created in pmap_bootstrap() right after the direct map, so 105 * we should be able to just use pmap_mapbios() here instead. 106 * 107 * This makes the following assumptions about how we use this KVA: 108 * pages 0 and 1 are used to map in the header of each table found via 109 * the RSDT or XSDT and pages 2 to n are used to map in the RSDT or 110 * XSDT. This has to use 2 pages for the table headers in case a 111 * header spans a page boundary. 112 * 113 * XXX: We don't ensure the table fits in the available address space 114 * in the crashdump map. 115 */ 116 117/* 118 * Map some memory using the crashdump map. 'offset' is an offset in 119 * pages into the crashdump map to use for the start of the mapping. 120 */ 121static void * 122table_map(vm_paddr_t pa, int offset, vm_offset_t length) 123{ 124 vm_offset_t va, off; 125 void *data; 126 127 off = pa & PAGE_MASK; 128 length = roundup(length + off, PAGE_SIZE); 129 pa = pa & PG_FRAME; 130 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) + 131 (offset * PAGE_SIZE); 132 data = (void *)(va + off); 133 length -= PAGE_SIZE; 134 while (length > 0) { 135 va += PAGE_SIZE; 136 pa += PAGE_SIZE; 137 length -= PAGE_SIZE; 138 pmap_kenter(va, pa); 139 invlpg(va); 140 } 141 return (data); 142} 143 144/* Unmap memory previously mapped with table_map(). */ 145static void 146table_unmap(void *data, vm_offset_t length) 147{ 148 vm_offset_t va, off; 149 150 va = (vm_offset_t)data; 151 off = va & PAGE_MASK; 152 length = roundup(length + off, PAGE_SIZE); 153 va &= ~PAGE_MASK; 154 while (length > 0) { 155 pmap_kremove(va); 156 invlpg(va); 157 va += PAGE_SIZE; 158 length -= PAGE_SIZE; 159 } 160} 161 162/* 163 * Map a table at a given offset into the crashdump map. It first 164 * maps the header to determine the table length and then maps the 165 * entire table. 166 */ 167static void * 168map_table(vm_paddr_t pa, int offset, const char *sig) 169{ 170 ACPI_TABLE_HEADER *header; 171 vm_offset_t length; 172 void *table; 173 174 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER)); 175 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) { 176 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 177 return (NULL); 178 } 179 length = header->Length; 180 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 181 table = table_map(pa, offset, length); 182 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 183 if (bootverbose) 184 printf("ACPI: Failed checksum for table %s\n", sig); 185#if (ACPI_CHECKSUM_ABORT) 186 table_unmap(table, length); 187 return (NULL); 188#endif 189 } 190 return (table); 191} 192 193/* 194 * See if a given ACPI table is the requested table. Returns the 195 * length of the able if it matches or zero on failure. 196 */ 197static int 198probe_table(vm_paddr_t address, const char *sig) 199{ 200 ACPI_TABLE_HEADER *table; 201 202 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER)); 203 if (table == NULL) { 204 if (bootverbose) 205 printf("ACPI: Failed to map table at 0x%jx\n", 206 (uintmax_t)address); 207 return (0); 208 } 209 if (bootverbose) 210 printf("Table '%.4s' at 0x%jx\n", table->Signature, 211 (uintmax_t)address); 212 213 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) { 214 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 215 return (0); 216 } 217 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 218 return (1); 219} 220 221/* 222 * Try to map a table at a given physical address previously returned 223 * by acpi_find_table(). 224 */ 225void * 226acpi_map_table(vm_paddr_t pa, const char *sig) 227{ 228 229 return (map_table(pa, 0, sig)); 230} 231 232/* Unmap a table previously mapped via acpi_map_table(). */ 233void 234acpi_unmap_table(void *table) 235{ 236 ACPI_TABLE_HEADER *header; 237 238 header = (ACPI_TABLE_HEADER *)table; 239 table_unmap(table, header->Length); 240} 241 242/* 243 * Return the physical address of the requested table or zero if one 244 * is not found. 245 */ 246vm_paddr_t 247acpi_find_table(const char *sig) 248{ 249 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 250 ACPI_TABLE_RSDP *rsdp; 251 ACPI_TABLE_RSDT *rsdt; 252 ACPI_TABLE_XSDT *xsdt; 253 ACPI_TABLE_HEADER *table; 254 vm_paddr_t addr; 255 int i, count; 256 257 if (resource_disabled("acpi", 0)) 258 return (0); 259 260 /* 261 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 262 * calls pmap_mapbios() to find the RSDP, we assume that we can use 263 * pmap_mapbios() to map the RSDP. 264 */ 265 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 266 return (0); 267 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 268 if (rsdp == NULL) { 269 if (bootverbose) 270 printf("ACPI: Failed to map RSDP\n"); 271 return (0); 272 } 273 274 /* 275 * For ACPI >= 2.0, use the XSDT if it is available. 276 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2 277 * in the crashdump area. Pages 0 and 1 are used to map in the 278 * headers of candidate ACPI tables. 279 */ 280 addr = 0; 281 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 282 /* 283 * AcpiOsGetRootPointer only verifies the checksum for 284 * the version 1.0 portion of the RSDP. Version 2.0 has 285 * an additional checksum that we verify first. 286 */ 287 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 288 if (bootverbose) 289 printf("ACPI: RSDP failed extended checksum\n"); 290 return (0); 291 } 292 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT); 293 if (xsdt == NULL) { 294 if (bootverbose) 295 printf("ACPI: Failed to map XSDT\n"); 296 return (0); 297 } 298 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 299 sizeof(UINT64); 300 for (i = 0; i < count; i++) 301 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 302 addr = xsdt->TableOffsetEntry[i]; 303 break; 304 } 305 acpi_unmap_table(xsdt); 306 } else { 307 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT); 308 if (rsdt == NULL) { 309 if (bootverbose) 310 printf("ACPI: Failed to map RSDT\n"); 311 return (0); 312 } 313 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 314 sizeof(UINT32); 315 for (i = 0; i < count; i++) 316 if (probe_table(rsdt->TableOffsetEntry[i], sig)) { 317 addr = rsdt->TableOffsetEntry[i]; 318 break; 319 } 320 acpi_unmap_table(rsdt); 321 } 322 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 323 if (addr == 0) { 324 if (bootverbose) 325 printf("ACPI: No %s table found\n", sig); 326 return (0); 327 } 328 if (bootverbose) 329 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr); 330 331 /* 332 * Verify that we can map the full table and that its checksum is 333 * correct, etc. 334 */ 335 table = map_table(addr, 0, sig); 336 if (table == NULL) 337 return (0); 338 acpi_unmap_table(table); 339 340 return (addr); 341} 342 343/* 344 * ACPI nexus(4) driver. 345 */ 346static int 347nexus_acpi_probe(device_t dev) 348{ 349 int error; 350 351 error = acpi_identify(); 352 if (error) 353 return (error); 354 355 return (BUS_PROBE_DEFAULT); 356} 357 358static int 359nexus_acpi_attach(device_t dev) 360{ 361 device_t acpi_dev; 362 int error; 363 364 nexus_init_resources(); 365 bus_generic_probe(dev); 366 acpi_dev = BUS_ADD_CHILD(dev, 10, "acpi", 0); 367 if (acpi_dev == NULL) 368 panic("failed to add acpi0 device"); 369 370 error = bus_generic_attach(dev); 371 if (error == 0) 372 acpi_install_wakeup_handler(device_get_softc(acpi_dev)); 373 374 return (error); 375} 376 377static device_method_t nexus_acpi_methods[] = { 378 /* Device interface */ 379 DEVMETHOD(device_probe, nexus_acpi_probe), 380 DEVMETHOD(device_attach, nexus_acpi_attach), 381 382 { 0, 0 } 383}; 384 385DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); 386static devclass_t nexus_devclass; 387 388DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0); 389