1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 Mitsuru IWASAKI 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/sysctl.h> 37 38 #include <vm/vm.h> 39 #include <vm/pmap.h> 40 41 #include <contrib/dev/acpica/include/acpi.h> 42 #include <contrib/dev/acpica/include/accommon.h> 43 #include <contrib/dev/acpica/include/actables.h> 44 45 #include <dev/acpica/acpivar.h> 46 47 #include <machine/nexusvar.h> 48 49 int acpi_resume_beep; 50 SYSCTL_INT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN, 51 &acpi_resume_beep, 0, "Beep the PC speaker when resuming"); 52 53 int acpi_reset_video; 54 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video); 55 56 static int intr_model = ACPI_INTR_PIC; 57 58 int 59 acpi_machdep_init(device_t dev) 60 { 61 struct acpi_softc *sc; 62 63 sc = device_get_softc(dev); 64 65 acpi_apm_init(sc); 66 acpi_install_wakeup_handler(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 /* 94 * Support for mapping ACPI tables during early boot. Currently this 95 * uses the crashdump map to map each table. However, the crashdump 96 * map is created in pmap_bootstrap() right after the direct map, so 97 * we should be able to just use pmap_mapbios() here instead. 98 * 99 * This makes the following assumptions about how we use this KVA: 100 * pages 0 and 1 are used to map in the header of each table found via 101 * the RSDT or XSDT and pages 2 to n are used to map in the RSDT or 102 * XSDT. This has to use 2 pages for the table headers in case a 103 * header spans a page boundary. 104 * 105 * XXX: We don't ensure the table fits in the available address space 106 * in the crashdump map. 107 */ 108 109 /* 110 * Map some memory using the crashdump map. 'offset' is an offset in 111 * pages into the crashdump map to use for the start of the mapping. 112 */ 113 static void * 114 table_map(vm_paddr_t pa, int offset, vm_offset_t length) 115 { 116 vm_offset_t va, off; 117 void *data; 118 119 off = pa & PAGE_MASK; 120 length = round_page(length + off); 121 pa = pa & PG_FRAME; 122 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) + 123 (offset * PAGE_SIZE); 124 data = (void *)(va + off); 125 length -= PAGE_SIZE; 126 while (length > 0) { 127 va += PAGE_SIZE; 128 pa += PAGE_SIZE; 129 length -= PAGE_SIZE; 130 pmap_kenter(va, pa); 131 invlpg(va); 132 } 133 return (data); 134 } 135 136 /* Unmap memory previously mapped with table_map(). */ 137 static void 138 table_unmap(void *data, vm_offset_t length) 139 { 140 vm_offset_t va, off; 141 142 va = (vm_offset_t)data; 143 off = va & PAGE_MASK; 144 length = round_page(length + off); 145 va &= ~PAGE_MASK; 146 while (length > 0) { 147 pmap_kremove(va); 148 invlpg(va); 149 va += PAGE_SIZE; 150 length -= PAGE_SIZE; 151 } 152 } 153 154 /* 155 * Map a table at a given offset into the crashdump map. It first 156 * maps the header to determine the table length and then maps the 157 * entire table. 158 */ 159 static void * 160 map_table(vm_paddr_t pa, int offset, const char *sig) 161 { 162 ACPI_TABLE_HEADER *header; 163 vm_offset_t length; 164 void *table; 165 166 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER)); 167 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) { 168 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 169 return (NULL); 170 } 171 length = header->Length; 172 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 173 table = table_map(pa, offset, length); 174 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 175 if (bootverbose) 176 printf("ACPI: Failed checksum for table %s\n", sig); 177 #if (ACPI_CHECKSUM_ABORT) 178 table_unmap(table, length); 179 return (NULL); 180 #endif 181 } 182 return (table); 183 } 184 185 /* 186 * See if a given ACPI table is the requested table. Returns the 187 * length of the able if it matches or zero on failure. 188 */ 189 static int 190 probe_table(vm_paddr_t address, const char *sig) 191 { 192 ACPI_TABLE_HEADER *table; 193 194 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER)); 195 if (table == NULL) { 196 if (bootverbose) 197 printf("ACPI: Failed to map table at 0x%jx\n", 198 (uintmax_t)address); 199 return (0); 200 } 201 if (bootverbose) 202 printf("Table '%.4s' at 0x%jx\n", table->Signature, 203 (uintmax_t)address); 204 205 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) { 206 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 207 return (0); 208 } 209 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 210 return (1); 211 } 212 213 /* 214 * Try to map a table at a given physical address previously returned 215 * by acpi_find_table(). 216 */ 217 void * 218 acpi_map_table(vm_paddr_t pa, const char *sig) 219 { 220 221 return (map_table(pa, 0, sig)); 222 } 223 224 /* Unmap a table previously mapped via acpi_map_table(). */ 225 void 226 acpi_unmap_table(void *table) 227 { 228 ACPI_TABLE_HEADER *header; 229 230 header = (ACPI_TABLE_HEADER *)table; 231 table_unmap(table, header->Length); 232 } 233 234 /* 235 * Return the physical address of the requested table or zero if one 236 * is not found. 237 */ 238 vm_paddr_t 239 acpi_find_table(const char *sig) 240 { 241 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 242 ACPI_TABLE_RSDP *rsdp; 243 ACPI_TABLE_RSDT *rsdt; 244 ACPI_TABLE_XSDT *xsdt; 245 ACPI_TABLE_HEADER *table; 246 vm_paddr_t addr; 247 int i, count; 248 249 if (resource_disabled("acpi", 0)) 250 return (0); 251 252 /* 253 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 254 * calls pmap_mapbios() to find the RSDP, we assume that we can use 255 * pmap_mapbios() to map the RSDP. 256 */ 257 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 258 return (0); 259 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 260 if (rsdp == NULL) { 261 if (bootverbose) 262 printf("ACPI: Failed to map RSDP\n"); 263 return (0); 264 } 265 266 /* 267 * For ACPI >= 2.0, use the XSDT if it is available. 268 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2 269 * in the crashdump area. Pages 0 and 1 are used to map in the 270 * headers of candidate ACPI tables. 271 */ 272 addr = 0; 273 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 274 /* 275 * AcpiOsGetRootPointer only verifies the checksum for 276 * the version 1.0 portion of the RSDP. Version 2.0 has 277 * an additional checksum that we verify first. 278 */ 279 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 280 if (bootverbose) 281 printf("ACPI: RSDP failed extended checksum\n"); 282 return (0); 283 } 284 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT); 285 if (xsdt == NULL) { 286 if (bootverbose) 287 printf("ACPI: Failed to map XSDT\n"); 288 return (0); 289 } 290 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 291 sizeof(UINT64); 292 for (i = 0; i < count; i++) 293 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 294 addr = xsdt->TableOffsetEntry[i]; 295 break; 296 } 297 acpi_unmap_table(xsdt); 298 } else { 299 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT); 300 if (rsdt == NULL) { 301 if (bootverbose) 302 printf("ACPI: Failed to map RSDT\n"); 303 return (0); 304 } 305 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 306 sizeof(UINT32); 307 for (i = 0; i < count; i++) 308 if (probe_table(rsdt->TableOffsetEntry[i], sig)) { 309 addr = rsdt->TableOffsetEntry[i]; 310 break; 311 } 312 acpi_unmap_table(rsdt); 313 } 314 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 315 if (addr == 0) { 316 if (bootverbose) 317 printf("ACPI: No %s table found\n", sig); 318 return (0); 319 } 320 if (bootverbose) 321 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr); 322 323 /* 324 * Verify that we can map the full table and that its checksum is 325 * correct, etc. 326 */ 327 table = map_table(addr, 0, sig); 328 if (table == NULL) 329 return (0); 330 acpi_unmap_table(table); 331 332 return (addr); 333 } 334 335 /* 336 * ACPI nexus(4) driver. 337 */ 338 static int 339 nexus_acpi_probe(device_t dev) 340 { 341 int error; 342 343 error = acpi_identify(); 344 if (error) 345 return (error); 346 347 return (BUS_PROBE_DEFAULT); 348 } 349 350 static int 351 nexus_acpi_attach(device_t dev) 352 { 353 354 nexus_init_resources(); 355 bus_generic_probe(dev); 356 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL) 357 panic("failed to add acpi0 device"); 358 359 return (bus_generic_attach(dev)); 360 } 361 362 static device_method_t nexus_acpi_methods[] = { 363 /* Device interface */ 364 DEVMETHOD(device_probe, nexus_acpi_probe), 365 DEVMETHOD(device_attach, nexus_acpi_attach), 366 367 { 0, 0 } 368 }; 369 370 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); 371 static devclass_t nexus_devclass; 372 373 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0); 374