acpi_machdep.c revision 331722
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: stable/11/sys/amd64/acpica/acpi_machdep.c 331722 2018-03-29 02:50:57Z eadler $"); 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 47int acpi_resume_beep; 48SYSCTL_INT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN, 49 &acpi_resume_beep, 0, "Beep the PC speaker when resuming"); 50 51int acpi_reset_video; 52TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video); 53 54static int intr_model = ACPI_INTR_PIC; 55 56int 57acpi_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 acpi_install_wakeup_handler(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 77void 78acpi_SetDefaultIntrModel(int model) 79{ 80 81 intr_model = model; 82} 83 84int 85acpi_machdep_quirks(int *quirks) 86{ 87 88 return (0); 89} 90 91/* 92 * Support for mapping ACPI tables during early boot. Currently this 93 * uses the crashdump map to map each table. However, the crashdump 94 * map is created in pmap_bootstrap() right after the direct map, so 95 * we should be able to just use pmap_mapbios() here instead. 96 * 97 * This makes the following assumptions about how we use this KVA: 98 * pages 0 and 1 are used to map in the header of each table found via 99 * the RSDT or XSDT and pages 2 to n are used to map in the RSDT or 100 * XSDT. This has to use 2 pages for the table headers in case a 101 * header spans a page boundary. 102 * 103 * XXX: We don't ensure the table fits in the available address space 104 * in the crashdump map. 105 */ 106 107/* 108 * Map some memory using the crashdump map. 'offset' is an offset in 109 * pages into the crashdump map to use for the start of the mapping. 110 */ 111static void * 112table_map(vm_paddr_t pa, int offset, vm_offset_t length) 113{ 114 vm_offset_t va, off; 115 void *data; 116 117 off = pa & PAGE_MASK; 118 length = round_page(length + off); 119 pa = pa & PG_FRAME; 120 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) + 121 (offset * PAGE_SIZE); 122 data = (void *)(va + off); 123 length -= PAGE_SIZE; 124 while (length > 0) { 125 va += PAGE_SIZE; 126 pa += PAGE_SIZE; 127 length -= PAGE_SIZE; 128 pmap_kenter(va, pa); 129 invlpg(va); 130 } 131 return (data); 132} 133 134/* Unmap memory previously mapped with table_map(). */ 135static void 136table_unmap(void *data, vm_offset_t length) 137{ 138 vm_offset_t va, off; 139 140 va = (vm_offset_t)data; 141 off = va & PAGE_MASK; 142 length = round_page(length + off); 143 va &= ~PAGE_MASK; 144 while (length > 0) { 145 pmap_kremove(va); 146 invlpg(va); 147 va += PAGE_SIZE; 148 length -= PAGE_SIZE; 149 } 150} 151 152/* 153 * Map a table at a given offset into the crashdump map. It first 154 * maps the header to determine the table length and then maps the 155 * entire table. 156 */ 157static void * 158map_table(vm_paddr_t pa, int offset, const char *sig) 159{ 160 ACPI_TABLE_HEADER *header; 161 vm_offset_t length; 162 void *table; 163 164 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER)); 165 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) { 166 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 167 return (NULL); 168 } 169 length = header->Length; 170 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 171 table = table_map(pa, offset, length); 172 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 173 if (bootverbose) 174 printf("ACPI: Failed checksum for table %s\n", sig); 175#if (ACPI_CHECKSUM_ABORT) 176 table_unmap(table, length); 177 return (NULL); 178#endif 179 } 180 return (table); 181} 182 183/* 184 * See if a given ACPI table is the requested table. Returns the 185 * length of the able if it matches or zero on failure. 186 */ 187static int 188probe_table(vm_paddr_t address, const char *sig) 189{ 190 ACPI_TABLE_HEADER *table; 191 192 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER)); 193 if (table == NULL) { 194 if (bootverbose) 195 printf("ACPI: Failed to map table at 0x%jx\n", 196 (uintmax_t)address); 197 return (0); 198 } 199 if (bootverbose) 200 printf("Table '%.4s' at 0x%jx\n", table->Signature, 201 (uintmax_t)address); 202 203 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) { 204 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 205 return (0); 206 } 207 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 208 return (1); 209} 210 211/* 212 * Try to map a table at a given physical address previously returned 213 * by acpi_find_table(). 214 */ 215void * 216acpi_map_table(vm_paddr_t pa, const char *sig) 217{ 218 219 return (map_table(pa, 0, sig)); 220} 221 222/* Unmap a table previously mapped via acpi_map_table(). */ 223void 224acpi_unmap_table(void *table) 225{ 226 ACPI_TABLE_HEADER *header; 227 228 header = (ACPI_TABLE_HEADER *)table; 229 table_unmap(table, header->Length); 230} 231 232/* 233 * Return the physical address of the requested table or zero if one 234 * is not found. 235 */ 236vm_paddr_t 237acpi_find_table(const char *sig) 238{ 239 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 240 ACPI_TABLE_RSDP *rsdp; 241 ACPI_TABLE_RSDT *rsdt; 242 ACPI_TABLE_XSDT *xsdt; 243 ACPI_TABLE_HEADER *table; 244 vm_paddr_t addr; 245 int i, count; 246 247 if (resource_disabled("acpi", 0)) 248 return (0); 249 250 /* 251 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 252 * calls pmap_mapbios() to find the RSDP, we assume that we can use 253 * pmap_mapbios() to map the RSDP. 254 */ 255 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 256 return (0); 257 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 258 if (rsdp == NULL) { 259 if (bootverbose) 260 printf("ACPI: Failed to map RSDP\n"); 261 return (0); 262 } 263 264 /* 265 * For ACPI >= 2.0, use the XSDT if it is available. 266 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2 267 * in the crashdump area. Pages 0 and 1 are used to map in the 268 * headers of candidate ACPI tables. 269 */ 270 addr = 0; 271 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 272 /* 273 * AcpiOsGetRootPointer only verifies the checksum for 274 * the version 1.0 portion of the RSDP. Version 2.0 has 275 * an additional checksum that we verify first. 276 */ 277 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 278 if (bootverbose) 279 printf("ACPI: RSDP failed extended checksum\n"); 280 return (0); 281 } 282 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT); 283 if (xsdt == NULL) { 284 if (bootverbose) 285 printf("ACPI: Failed to map XSDT\n"); 286 return (0); 287 } 288 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 289 sizeof(UINT64); 290 for (i = 0; i < count; i++) 291 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 292 addr = xsdt->TableOffsetEntry[i]; 293 break; 294 } 295 acpi_unmap_table(xsdt); 296 } else { 297 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT); 298 if (rsdt == NULL) { 299 if (bootverbose) 300 printf("ACPI: Failed to map RSDT\n"); 301 return (0); 302 } 303 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 304 sizeof(UINT32); 305 for (i = 0; i < count; i++) 306 if (probe_table(rsdt->TableOffsetEntry[i], sig)) { 307 addr = rsdt->TableOffsetEntry[i]; 308 break; 309 } 310 acpi_unmap_table(rsdt); 311 } 312 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 313 if (addr == 0) { 314 if (bootverbose) 315 printf("ACPI: No %s table found\n", sig); 316 return (0); 317 } 318 if (bootverbose) 319 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr); 320 321 /* 322 * Verify that we can map the full table and that its checksum is 323 * correct, etc. 324 */ 325 table = map_table(addr, 0, sig); 326 if (table == NULL) 327 return (0); 328 acpi_unmap_table(table); 329 330 return (addr); 331} 332 333/* 334 * ACPI nexus(4) driver. 335 */ 336static int 337nexus_acpi_probe(device_t dev) 338{ 339 int error; 340 341 error = acpi_identify(); 342 if (error) 343 return (error); 344 345 return (BUS_PROBE_DEFAULT); 346} 347 348static int 349nexus_acpi_attach(device_t dev) 350{ 351 352 nexus_init_resources(); 353 bus_generic_probe(dev); 354 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL) 355 panic("failed to add acpi0 device"); 356 357 return (bus_generic_attach(dev)); 358} 359 360static device_method_t nexus_acpi_methods[] = { 361 /* Device interface */ 362 DEVMETHOD(device_probe, nexus_acpi_probe), 363 DEVMETHOD(device_attach, nexus_acpi_attach), 364 365 { 0, 0 } 366}; 367 368DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); 369static devclass_t nexus_devclass; 370 371DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0); 372