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, const char *sig) 67 { 68 ACPI_TABLE_HEADER *header; 69 vm_size_t length; 70 void *table; 71 72 header = pmap_mapbios(pa, sizeof(ACPI_TABLE_HEADER)); 73 if (strncmp(header->Signature, sig, ACPI_NAMESEG_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 table 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 } 108 109 if (strncmp(table->Signature, sig, ACPI_NAMESEG_SIZE) != 0) { 110 pmap_unmapbios((vm_offset_t)table, sizeof(ACPI_TABLE_HEADER)); 111 return (0); 112 } 113 pmap_unmapbios((vm_offset_t)table, sizeof(ACPI_TABLE_HEADER)); 114 return (1); 115 } 116 117 /* Unmap a table previously mapped via acpi_map_table(). */ 118 void 119 acpi_unmap_table(void *table) 120 { 121 ACPI_TABLE_HEADER *header; 122 123 header = (ACPI_TABLE_HEADER *)table; 124 pmap_unmapbios((vm_offset_t)table, header->Length); 125 } 126 127 /* 128 * Try to map a table at a given physical address previously returned 129 * by acpi_find_table(). 130 */ 131 void * 132 acpi_map_table(vm_paddr_t pa, const char *sig) 133 { 134 135 return (map_table(pa, sig)); 136 } 137 138 /* 139 * Return the physical address of the requested table or zero if one 140 * is not found. 141 */ 142 vm_paddr_t 143 acpi_find_table(const char *sig) 144 { 145 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 146 ACPI_TABLE_RSDP *rsdp; 147 ACPI_TABLE_XSDT *xsdt; 148 ACPI_TABLE_HEADER *table; 149 vm_paddr_t addr; 150 int i, count; 151 152 if (resource_disabled("acpi", 0)) 153 return (0); 154 155 /* 156 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 157 * calls pmap_mapbios() to find the RSDP, we assume that we can use 158 * pmap_mapbios() to map the RSDP. 159 */ 160 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 161 return (0); 162 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 163 if (rsdp == NULL) { 164 if (bootverbose) 165 printf("ACPI: Failed to map RSDP\n"); 166 return (0); 167 } 168 169 addr = 0; 170 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 171 /* 172 * AcpiOsGetRootPointer only verifies the checksum for 173 * the version 1.0 portion of the RSDP. Version 2.0 has 174 * an additional checksum that we verify first. 175 */ 176 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 177 if (bootverbose) 178 printf("ACPI: RSDP failed extended checksum\n"); 179 return (0); 180 } 181 xsdt = map_table(rsdp->XsdtPhysicalAddress, ACPI_SIG_XSDT); 182 if (xsdt == NULL) { 183 if (bootverbose) 184 printf("ACPI: Failed to map XSDT\n"); 185 pmap_unmapbios((vm_offset_t)rsdp, 186 sizeof(ACPI_TABLE_RSDP)); 187 return (0); 188 } 189 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 190 sizeof(UINT64); 191 for (i = 0; i < count; i++) 192 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 193 addr = xsdt->TableOffsetEntry[i]; 194 break; 195 } 196 acpi_unmap_table(xsdt); 197 } 198 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 199 200 if (addr == 0) 201 return (0); 202 203 /* 204 * Verify that we can map the full table and that its checksum is 205 * correct, etc. 206 */ 207 table = map_table(addr, sig); 208 if (table == NULL) 209 return (0); 210 acpi_unmap_table(table); 211 212 return (addr); 213 } 214 215 int 216 acpi_map_addr(struct acpi_generic_address *addr, bus_space_tag_t *tag, 217 bus_space_handle_t *handle, bus_size_t size) 218 { 219 bus_addr_t phys; 220 221 /* Check if the device is Memory mapped */ 222 if (addr->SpaceId != 0) 223 return (ENXIO); 224 225 phys = addr->Address; 226 *tag = &memmap_bus; 227 228 return (bus_space_map(*tag, phys, size, 0, handle)); 229 } 230 231 #if MAXMEMDOM > 1 232 static void 233 parse_pxm_tables(void *dummy) 234 { 235 uint64_t mmfr0, parange; 236 237 /* Only parse ACPI tables when booting via ACPI */ 238 if (arm64_bus_method != ARM64_BUS_ACPI) 239 return; 240 241 if (!get_kernel_reg(ID_AA64MMFR0_EL1, &mmfr0)) { 242 /* chosen arbitrarily */ 243 mmfr0 = ID_AA64MMFR0_PARange_1T; 244 } 245 246 switch (ID_AA64MMFR0_PARange_VAL(mmfr0)) { 247 case ID_AA64MMFR0_PARange_4G: 248 parange = (vm_paddr_t)4 << 30 /* GiB */; 249 break; 250 case ID_AA64MMFR0_PARange_64G: 251 parange = (vm_paddr_t)64 << 30 /* GiB */; 252 break; 253 case ID_AA64MMFR0_PARange_1T: 254 parange = (vm_paddr_t)1 << 40 /* TiB */; 255 break; 256 case ID_AA64MMFR0_PARange_4T: 257 parange = (vm_paddr_t)4 << 40 /* TiB */; 258 break; 259 case ID_AA64MMFR0_PARange_16T: 260 parange = (vm_paddr_t)16 << 40 /* TiB */; 261 break; 262 case ID_AA64MMFR0_PARange_256T: 263 parange = (vm_paddr_t)256 << 40 /* TiB */; 264 break; 265 case ID_AA64MMFR0_PARange_4P: 266 parange = (vm_paddr_t)4 << 50 /* PiB */; 267 break; 268 default: 269 /* chosen arbitrarily */ 270 parange = (vm_paddr_t)1 << 40 /* TiB */; 271 printf("Unknown value for PARange in mmfr0 (%#lx)\n", mmfr0); 272 break; 273 } 274 275 acpi_pxm_init(MAXCPU, parange); 276 acpi_pxm_parse_tables(); 277 acpi_pxm_set_mem_locality(); 278 } 279 SYSINIT(parse_pxm_tables, SI_SUB_VM - 1, SI_ORDER_FIRST, parse_pxm_tables, 280 NULL); 281 #endif 282