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 uint32_t acpi_resume_beep; 50 SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN, &acpi_resume_beep, 51 0, "Beep the PC speaker when resuming"); 52 53 uint32_t 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 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt, 70 INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW); 71 else 72 acpi_SetIntrModel(intr_model); 73 74 SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx, 75 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO, 76 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0, 77 "Call the VESA reset BIOS vector on the resume path"); 78 79 return (0); 80 } 81 82 void 83 acpi_SetDefaultIntrModel(int model) 84 { 85 86 intr_model = model; 87 } 88 89 /* Check BIOS date. If 1998 or older, disable ACPI. */ 90 int 91 acpi_machdep_quirks(int *quirks) 92 { 93 char *va; 94 int year; 95 96 /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */ 97 va = pmap_mapbios(0xffff0, 16); 98 sscanf(va + 11, "%2d", &year); 99 pmap_unmapbios((vm_offset_t)va, 16); 100 101 /* 102 * Date must be >= 1/1/1999 or we don't trust ACPI. Note that this 103 * check must be changed by my 114th birthday. 104 */ 105 if (year > 90 && year < 99) 106 *quirks = ACPI_Q_BROKEN; 107 108 return (0); 109 } 110 111 /* 112 * Map a table. First map the header to determine the table length and then map 113 * the entire table. 114 */ 115 static void * 116 map_table(vm_paddr_t pa, const char *sig) 117 { 118 ACPI_TABLE_HEADER *header; 119 vm_size_t length; 120 void *table; 121 122 header = pmap_mapbios(pa, sizeof(ACPI_TABLE_HEADER)); 123 if (strncmp(header->Signature, sig, ACPI_NAMESEG_SIZE) != 0) { 124 pmap_unmapbios((vm_offset_t)header, sizeof(ACPI_TABLE_HEADER)); 125 return (NULL); 126 } 127 length = header->Length; 128 pmap_unmapbios((vm_offset_t)header, sizeof(ACPI_TABLE_HEADER)); 129 table = pmap_mapbios(pa, length); 130 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 131 if (bootverbose) 132 printf("ACPI: Failed checksum for table %s\n", sig); 133 #if (ACPI_CHECKSUM_ABORT) 134 pmap_unmapbios((vm_offset_t)table, length); 135 return (NULL); 136 #endif 137 } 138 return (table); 139 } 140 141 /* 142 * See if a given ACPI table is the requested table. Returns the 143 * length of the table if it matches or zero on failure. 144 */ 145 static int 146 probe_table(vm_paddr_t address, const char *sig) 147 { 148 ACPI_TABLE_HEADER *table; 149 int ret; 150 151 table = pmap_mapbios(address, sizeof(ACPI_TABLE_HEADER)); 152 ret = strncmp(table->Signature, sig, ACPI_NAMESEG_SIZE) == 0; 153 pmap_unmapbios((vm_offset_t)table, sizeof(ACPI_TABLE_HEADER)); 154 return (ret); 155 } 156 157 /* 158 * Try to map a table at a given physical address previously returned 159 * by acpi_find_table(). 160 */ 161 void * 162 acpi_map_table(vm_paddr_t pa, const char *sig) 163 { 164 165 return (map_table(pa, sig)); 166 } 167 168 /* Unmap a table previously mapped via acpi_map_table(). */ 169 void 170 acpi_unmap_table(void *table) 171 { 172 ACPI_TABLE_HEADER *header; 173 174 header = (ACPI_TABLE_HEADER *)table; 175 pmap_unmapbios((vm_offset_t)table, header->Length); 176 } 177 178 /* 179 * Return the physical address of the requested table or zero if one 180 * is not found. 181 */ 182 vm_paddr_t 183 acpi_find_table(const char *sig) 184 { 185 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 186 ACPI_TABLE_RSDP *rsdp; 187 ACPI_TABLE_RSDT *rsdt; 188 ACPI_TABLE_XSDT *xsdt; 189 ACPI_TABLE_HEADER *table; 190 vm_paddr_t addr; 191 int i, count; 192 193 if (resource_disabled("acpi", 0)) 194 return (0); 195 196 /* 197 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 198 * calls pmap_mapbios() to find the RSDP, we assume that we can use 199 * pmap_mapbios() to map the RSDP. 200 */ 201 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 202 return (0); 203 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 204 if (rsdp == NULL) { 205 if (bootverbose) 206 printf("ACPI: Failed to map RSDP\n"); 207 return (0); 208 } 209 210 /* 211 * For ACPI >= 2.0, use the XSDT if it is available. 212 * Otherwise, use the RSDT. 213 */ 214 addr = 0; 215 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 216 /* 217 * AcpiOsGetRootPointer only verifies the checksum for 218 * the version 1.0 portion of the RSDP. Version 2.0 has 219 * an additional checksum that we verify first. 220 */ 221 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 222 if (bootverbose) 223 printf("ACPI: RSDP failed extended checksum\n"); 224 return (0); 225 } 226 xsdt = map_table(rsdp->XsdtPhysicalAddress, ACPI_SIG_XSDT); 227 if (xsdt == NULL) { 228 if (bootverbose) 229 printf("ACPI: Failed to map XSDT\n"); 230 return (0); 231 } 232 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 233 sizeof(UINT64); 234 for (i = 0; i < count; i++) 235 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 236 addr = xsdt->TableOffsetEntry[i]; 237 break; 238 } 239 acpi_unmap_table(xsdt); 240 } else { 241 rsdt = map_table(rsdp->RsdtPhysicalAddress, ACPI_SIG_RSDT); 242 if (rsdt == NULL) { 243 if (bootverbose) 244 printf("ACPI: Failed to map RSDT\n"); 245 return (0); 246 } 247 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 248 sizeof(UINT32); 249 for (i = 0; i < count; i++) 250 if (probe_table(rsdt->TableOffsetEntry[i], sig)) { 251 addr = rsdt->TableOffsetEntry[i]; 252 break; 253 } 254 acpi_unmap_table(rsdt); 255 } 256 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 257 if (addr == 0) 258 return (0); 259 260 /* 261 * Verify that we can map the full table and that its checksum is 262 * correct, etc. 263 */ 264 table = map_table(addr, sig); 265 if (table == NULL) 266 return (0); 267 acpi_unmap_table(table); 268 269 return (addr); 270 } 271 272 /* 273 * ACPI nexus(4) driver. 274 */ 275 static int 276 nexus_acpi_probe(device_t dev) 277 { 278 int error; 279 280 error = acpi_identify(); 281 if (error) 282 return (error); 283 device_quiet(dev); 284 return (BUS_PROBE_DEFAULT); 285 } 286 287 static int 288 nexus_acpi_attach(device_t dev) 289 { 290 291 nexus_init_resources(); 292 bus_generic_probe(dev); 293 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL) 294 panic("failed to add acpi0 device"); 295 296 return (bus_generic_attach(dev)); 297 } 298 299 static device_method_t nexus_acpi_methods[] = { 300 /* Device interface */ 301 DEVMETHOD(device_probe, nexus_acpi_probe), 302 DEVMETHOD(device_attach, nexus_acpi_attach), 303 { 0, 0 } 304 }; 305 306 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); 307 static devclass_t nexus_devclass; 308 309 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0); 310