1 /*- 2 * Copyright (c) 2001 Mitsuru IWASAKI 3 * Copyright (c) 2015 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * This software was developed by Andrew Turner under 7 * sponsorship from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/bus.h> 36 #include <sys/kernel.h> 37 38 #include <vm/vm.h> 39 #include <vm/pmap.h> 40 41 #include <machine/machdep.h> 42 43 #include <contrib/dev/acpica/include/acpi.h> 44 #include <contrib/dev/acpica/include/accommon.h> 45 #include <contrib/dev/acpica/include/actables.h> 46 47 #include <dev/acpica/acpivar.h> 48 49 extern struct bus_space memmap_bus; 50 51 int 52 acpi_machdep_init(device_t dev) 53 { 54 55 return (0); 56 } 57 58 int 59 acpi_machdep_quirks(int *quirks) 60 { 61 62 return (0); 63 } 64 65 static void * 66 map_table(vm_paddr_t pa, int offset, const char *sig) 67 { 68 ACPI_TABLE_HEADER *header; 69 vm_offset_t length; 70 void *table; 71 72 header = pmap_mapbios(pa, sizeof(ACPI_TABLE_HEADER)); 73 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) { 74 pmap_unmapbios((vm_offset_t)header, sizeof(ACPI_TABLE_HEADER)); 75 return (NULL); 76 } 77 length = header->Length; 78 pmap_unmapbios((vm_offset_t)header, sizeof(ACPI_TABLE_HEADER)); 79 80 table = pmap_mapbios(pa, length); 81 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 82 if (bootverbose) 83 printf("ACPI: Failed checksum for table %s\n", sig); 84 #if (ACPI_CHECKSUM_ABORT) 85 pmap_unmapbios(table, length); 86 return (NULL); 87 #endif 88 } 89 return (table); 90 } 91 92 /* 93 * See if a given ACPI table is the requested table. Returns the 94 * length of the able if it matches or zero on failure. 95 */ 96 static int 97 probe_table(vm_paddr_t address, const char *sig) 98 { 99 ACPI_TABLE_HEADER *table; 100 101 table = pmap_mapbios(address, sizeof(ACPI_TABLE_HEADER)); 102 if (table == NULL) { 103 if (bootverbose) 104 printf("ACPI: Failed to map table at 0x%jx\n", 105 (uintmax_t)address); 106 return (0); 107 } 108 if (bootverbose) 109 printf("Table '%.4s' at 0x%jx\n", table->Signature, 110 (uintmax_t)address); 111 112 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) { 113 pmap_unmapbios((vm_offset_t)table, sizeof(ACPI_TABLE_HEADER)); 114 return (0); 115 } 116 pmap_unmapbios((vm_offset_t)table, sizeof(ACPI_TABLE_HEADER)); 117 return (1); 118 } 119 120 /* Unmap a table previously mapped via acpi_map_table(). */ 121 void 122 acpi_unmap_table(void *table) 123 { 124 ACPI_TABLE_HEADER *header; 125 126 header = (ACPI_TABLE_HEADER *)table; 127 pmap_unmapbios((vm_offset_t)table, header->Length); 128 } 129 130 /* 131 * Try to map a table at a given physical address previously returned 132 * by acpi_find_table(). 133 */ 134 void * 135 acpi_map_table(vm_paddr_t pa, const char *sig) 136 { 137 138 return (map_table(pa, 0, sig)); 139 } 140 141 /* 142 * Return the physical address of the requested table or zero if one 143 * is not found. 144 */ 145 vm_paddr_t 146 acpi_find_table(const char *sig) 147 { 148 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 149 ACPI_TABLE_RSDP *rsdp; 150 ACPI_TABLE_XSDT *xsdt; 151 ACPI_TABLE_HEADER *table; 152 vm_paddr_t addr; 153 int i, count; 154 155 if (resource_disabled("acpi", 0)) 156 return (0); 157 158 /* 159 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 160 * calls pmap_mapbios() to find the RSDP, we assume that we can use 161 * pmap_mapbios() to map the RSDP. 162 */ 163 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 164 return (0); 165 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 166 if (rsdp == NULL) { 167 if (bootverbose) 168 printf("ACPI: Failed to map RSDP\n"); 169 return (0); 170 } 171 172 addr = 0; 173 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 174 /* 175 * AcpiOsGetRootPointer only verifies the checksum for 176 * the version 1.0 portion of the RSDP. Version 2.0 has 177 * an additional checksum that we verify first. 178 */ 179 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 180 if (bootverbose) 181 printf("ACPI: RSDP failed extended checksum\n"); 182 return (0); 183 } 184 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT); 185 if (xsdt == NULL) { 186 if (bootverbose) 187 printf("ACPI: Failed to map XSDT\n"); 188 pmap_unmapbios((vm_offset_t)rsdp, 189 sizeof(ACPI_TABLE_RSDP)); 190 return (0); 191 } 192 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 193 sizeof(UINT64); 194 for (i = 0; i < count; i++) 195 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 196 addr = xsdt->TableOffsetEntry[i]; 197 break; 198 } 199 acpi_unmap_table(xsdt); 200 } 201 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 202 203 if (addr == 0) { 204 if (bootverbose) 205 printf("ACPI: No %s table found\n", sig); 206 return (0); 207 } 208 if (bootverbose) 209 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr); 210 211 /* 212 * Verify that we can map the full table and that its checksum is 213 * correct, etc. 214 */ 215 table = map_table(addr, 0, sig); 216 if (table == NULL) 217 return (0); 218 acpi_unmap_table(table); 219 220 return (addr); 221 } 222 223 int 224 acpi_map_addr(struct acpi_generic_address *addr, bus_space_tag_t *tag, 225 bus_space_handle_t *handle, bus_size_t size) 226 { 227 bus_addr_t phys; 228 229 /* Check if the device is Memory mapped */ 230 if (addr->SpaceId != 0) 231 return (ENXIO); 232 233 phys = addr->Address; 234 *tag = &memmap_bus; 235 236 return (bus_space_map(*tag, phys, size, 0, handle)); 237 } 238 239 #if MAXMEMDOM > 1 240 static void 241 parse_pxm_tables(void *dummy) 242 { 243 244 /* Only parse ACPI tables when booting via ACPI */ 245 if (arm64_bus_method != ARM64_BUS_ACPI) 246 return; 247 248 acpi_pxm_init(MAXCPU, (vm_paddr_t)1 << 40); 249 acpi_pxm_parse_tables(); 250 acpi_pxm_set_mem_locality(); 251 } 252 SYSINIT(parse_pxm_tables, SI_SUB_VM - 1, SI_ORDER_FIRST, parse_pxm_tables, 253 NULL); 254 #endif 255