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 #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 47 int acpi_resume_beep; 48 SYSCTL_INT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN, 49 &acpi_resume_beep, 0, "Beep the PC speaker when resuming"); 50 51 int acpi_reset_video; 52 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video); 53 54 static int intr_model = ACPI_INTR_PIC; 55 56 int 57 acpi_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 77 void 78 acpi_SetDefaultIntrModel(int model) 79 { 80 81 intr_model = model; 82 } 83 84 int 85 acpi_machdep_quirks(int *quirks) 86 { 87 88 return (0); 89 } 90 91 /* 92 * Map a table. First map the header to determine the table length and then map 93 * the entire table. 94 */ 95 static void * 96 map_table(vm_paddr_t pa, const char *sig) 97 { 98 ACPI_TABLE_HEADER *header; 99 vm_size_t length; 100 void *table; 101 102 header = pmap_mapbios(pa, sizeof(ACPI_TABLE_HEADER)); 103 if (strncmp(header->Signature, sig, ACPI_NAMESEG_SIZE) != 0) { 104 pmap_unmapbios(header, sizeof(ACPI_TABLE_HEADER)); 105 return (NULL); 106 } 107 length = header->Length; 108 pmap_unmapbios(header, sizeof(ACPI_TABLE_HEADER)); 109 table = pmap_mapbios(pa, length); 110 if (ACPI_FAILURE(AcpiUtChecksum(table, length))) { 111 if (bootverbose) 112 printf("ACPI: Failed checksum for table %s\n", sig); 113 #if (ACPI_CHECKSUM_ABORT) 114 pmap_unmapbios(table, length); 115 return (NULL); 116 #endif 117 } 118 return (table); 119 } 120 121 /* 122 * See if a given ACPI table is the requested table. Returns the 123 * length of the table if it matches or zero on failure. 124 */ 125 static int 126 probe_table(vm_paddr_t address, const char *sig) 127 { 128 ACPI_TABLE_HEADER *table; 129 int ret; 130 131 table = pmap_mapbios(address, sizeof(ACPI_TABLE_HEADER)); 132 ret = strncmp(table->Signature, sig, ACPI_NAMESEG_SIZE) == 0; 133 pmap_unmapbios(table, sizeof(ACPI_TABLE_HEADER)); 134 return (ret); 135 } 136 137 /* 138 * Try to map a table at a given physical address previously returned 139 * by acpi_find_table(). 140 */ 141 void * 142 acpi_map_table(vm_paddr_t pa, const char *sig) 143 { 144 145 return (map_table(pa, sig)); 146 } 147 148 /* Unmap a table previously mapped via acpi_map_table(). */ 149 void 150 acpi_unmap_table(void *table) 151 { 152 ACPI_TABLE_HEADER *header; 153 154 header = (ACPI_TABLE_HEADER *)table; 155 pmap_unmapbios(table, header->Length); 156 } 157 158 /* 159 * Return the physical address of the requested table or zero if one 160 * is not found. 161 */ 162 vm_paddr_t 163 acpi_find_table(const char *sig) 164 { 165 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 166 ACPI_TABLE_RSDP *rsdp; 167 ACPI_TABLE_RSDT *rsdt; 168 ACPI_TABLE_XSDT *xsdt; 169 ACPI_TABLE_HEADER *table; 170 vm_paddr_t addr; 171 int i, count; 172 173 if (resource_disabled("acpi", 0)) 174 return (0); 175 176 /* 177 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 178 * calls pmap_mapbios() to find the RSDP, we assume that we can use 179 * pmap_mapbios() to map the RSDP. 180 */ 181 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 182 return (0); 183 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 184 if (rsdp == NULL) { 185 printf("ACPI: Failed to map RSDP\n"); 186 return (0); 187 } 188 189 /* 190 * For ACPI >= 2.0, use the XSDT if it is available. 191 * Otherwise, use the RSDT. 192 */ 193 addr = 0; 194 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 195 /* 196 * AcpiOsGetRootPointer only verifies the checksum for 197 * the version 1.0 portion of the RSDP. Version 2.0 has 198 * an additional checksum that we verify first. 199 */ 200 if (AcpiUtChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 201 printf("ACPI: RSDP failed extended checksum\n"); 202 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP)); 203 return (0); 204 } 205 xsdt = map_table(rsdp->XsdtPhysicalAddress, ACPI_SIG_XSDT); 206 if (xsdt == NULL) { 207 printf("ACPI: Failed to map XSDT\n"); 208 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP)); 209 return (0); 210 } 211 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 212 sizeof(UINT64); 213 for (i = 0; i < count; i++) 214 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 215 addr = xsdt->TableOffsetEntry[i]; 216 break; 217 } 218 acpi_unmap_table(xsdt); 219 } else { 220 rsdt = map_table(rsdp->RsdtPhysicalAddress, ACPI_SIG_RSDT); 221 if (rsdt == NULL) { 222 printf("ACPI: Failed to map RSDT\n"); 223 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP)); 224 return (0); 225 } 226 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 227 sizeof(UINT32); 228 for (i = 0; i < count; i++) 229 if (probe_table(rsdt->TableOffsetEntry[i], sig)) { 230 addr = rsdt->TableOffsetEntry[i]; 231 break; 232 } 233 acpi_unmap_table(rsdt); 234 } 235 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP)); 236 if (addr == 0) 237 return (0); 238 239 /* 240 * Verify that we can map the full table and that its checksum is 241 * correct, etc. 242 */ 243 table = map_table(addr, sig); 244 if (table == NULL) 245 return (0); 246 acpi_unmap_table(table); 247 248 return (addr); 249 } 250 251 /* 252 * ACPI nexus(4) driver. 253 */ 254 static int 255 nexus_acpi_probe(device_t dev) 256 { 257 int error; 258 259 error = acpi_identify(); 260 if (error) 261 return (error); 262 device_quiet(dev); 263 return (BUS_PROBE_DEFAULT); 264 } 265 266 static int 267 nexus_acpi_attach(device_t dev) 268 { 269 270 nexus_init_resources(); 271 bus_generic_probe(dev); 272 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL) 273 panic("failed to add acpi0 device"); 274 275 return (bus_generic_attach(dev)); 276 } 277 278 static device_method_t nexus_acpi_methods[] = { 279 /* Device interface */ 280 DEVMETHOD(device_probe, nexus_acpi_probe), 281 DEVMETHOD(device_attach, nexus_acpi_attach), 282 { 0, 0 } 283 }; 284 285 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); 286 287 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, 0, 0); 288