1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 * Map a table. First map the header to determine the table length and then map 95 * the entire table. 96 */ 97 static void * 98 map_table(vm_paddr_t pa, const char *sig) 99 { 100 ACPI_TABLE_HEADER *header; 101 vm_size_t length; 102 void *table; 103 104 header = pmap_mapbios(pa, sizeof(ACPI_TABLE_HEADER)); 105 if (strncmp(header->Signature, sig, ACPI_NAMESEG_SIZE) != 0) { 106 pmap_unmapbios(header, sizeof(ACPI_TABLE_HEADER)); 107 return (NULL); 108 } 109 length = header->Length; 110 pmap_unmapbios(header, sizeof(ACPI_TABLE_HEADER)); 111 table = pmap_mapbios(pa, length); 112 if (ACPI_FAILURE(AcpiUtChecksum(table, length))) { 113 if (bootverbose) 114 printf("ACPI: Failed checksum for table %s\n", sig); 115 #if (ACPI_CHECKSUM_ABORT) 116 pmap_unmapbios(table, length); 117 return (NULL); 118 #endif 119 } 120 return (table); 121 } 122 123 /* 124 * See if a given ACPI table is the requested table. Returns the 125 * length of the table if it matches or zero on failure. 126 */ 127 static int 128 probe_table(vm_paddr_t address, const char *sig) 129 { 130 ACPI_TABLE_HEADER *table; 131 int ret; 132 133 table = pmap_mapbios(address, sizeof(ACPI_TABLE_HEADER)); 134 ret = strncmp(table->Signature, sig, ACPI_NAMESEG_SIZE) == 0; 135 pmap_unmapbios(table, sizeof(ACPI_TABLE_HEADER)); 136 return (ret); 137 } 138 139 /* 140 * Try to map a table at a given physical address previously returned 141 * by acpi_find_table(). 142 */ 143 void * 144 acpi_map_table(vm_paddr_t pa, const char *sig) 145 { 146 147 return (map_table(pa, sig)); 148 } 149 150 /* Unmap a table previously mapped via acpi_map_table(). */ 151 void 152 acpi_unmap_table(void *table) 153 { 154 ACPI_TABLE_HEADER *header; 155 156 header = (ACPI_TABLE_HEADER *)table; 157 pmap_unmapbios(table, header->Length); 158 } 159 160 /* 161 * Return the physical address of the requested table or zero if one 162 * is not found. 163 */ 164 vm_paddr_t 165 acpi_find_table(const char *sig) 166 { 167 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 168 ACPI_TABLE_RSDP *rsdp; 169 ACPI_TABLE_RSDT *rsdt; 170 ACPI_TABLE_XSDT *xsdt; 171 ACPI_TABLE_HEADER *table; 172 vm_paddr_t addr; 173 int i, count; 174 175 if (resource_disabled("acpi", 0)) 176 return (0); 177 178 /* 179 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 180 * calls pmap_mapbios() to find the RSDP, we assume that we can use 181 * pmap_mapbios() to map the RSDP. 182 */ 183 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 184 return (0); 185 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 186 if (rsdp == NULL) { 187 printf("ACPI: Failed to map RSDP\n"); 188 return (0); 189 } 190 191 /* 192 * For ACPI >= 2.0, use the XSDT if it is available. 193 * Otherwise, use the RSDT. 194 */ 195 addr = 0; 196 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 197 /* 198 * AcpiOsGetRootPointer only verifies the checksum for 199 * the version 1.0 portion of the RSDP. Version 2.0 has 200 * an additional checksum that we verify first. 201 */ 202 if (AcpiUtChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 203 printf("ACPI: RSDP failed extended checksum\n"); 204 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP)); 205 return (0); 206 } 207 xsdt = map_table(rsdp->XsdtPhysicalAddress, ACPI_SIG_XSDT); 208 if (xsdt == NULL) { 209 printf("ACPI: Failed to map XSDT\n"); 210 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP)); 211 return (0); 212 } 213 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 214 sizeof(UINT64); 215 for (i = 0; i < count; i++) 216 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 217 addr = xsdt->TableOffsetEntry[i]; 218 break; 219 } 220 acpi_unmap_table(xsdt); 221 } else { 222 rsdt = map_table(rsdp->RsdtPhysicalAddress, ACPI_SIG_RSDT); 223 if (rsdt == NULL) { 224 printf("ACPI: Failed to map RSDT\n"); 225 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP)); 226 return (0); 227 } 228 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 229 sizeof(UINT32); 230 for (i = 0; i < count; i++) 231 if (probe_table(rsdt->TableOffsetEntry[i], sig)) { 232 addr = rsdt->TableOffsetEntry[i]; 233 break; 234 } 235 acpi_unmap_table(rsdt); 236 } 237 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP)); 238 if (addr == 0) 239 return (0); 240 241 /* 242 * Verify that we can map the full table and that its checksum is 243 * correct, etc. 244 */ 245 table = map_table(addr, sig); 246 if (table == NULL) 247 return (0); 248 acpi_unmap_table(table); 249 250 return (addr); 251 } 252 253 /* 254 * ACPI nexus(4) driver. 255 */ 256 static int 257 nexus_acpi_probe(device_t dev) 258 { 259 int error; 260 261 error = acpi_identify(); 262 if (error) 263 return (error); 264 device_quiet(dev); 265 return (BUS_PROBE_DEFAULT); 266 } 267 268 static int 269 nexus_acpi_attach(device_t dev) 270 { 271 272 nexus_init_resources(); 273 bus_generic_probe(dev); 274 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL) 275 panic("failed to add acpi0 device"); 276 277 return (bus_generic_attach(dev)); 278 } 279 280 static device_method_t nexus_acpi_methods[] = { 281 /* Device interface */ 282 DEVMETHOD(device_probe, nexus_acpi_probe), 283 DEVMETHOD(device_attach, nexus_acpi_attach), 284 { 0, 0 } 285 }; 286 287 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); 288 289 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, 0, 0); 290