1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Based on acpi.c from coreboot 4 * 5 * Copyright (C) 2015, Saket Sinha <saket.sinha89@gmail.com> 6 * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com> 7 */ 8 9 #include <common.h> 10 #include <cpu.h> 11 #include <dm.h> 12 #include <dm/uclass-internal.h> 13 #include <serial.h> 14 #include <version.h> 15 #include <asm/acpi/global_nvs.h> 16 #include <asm/acpi_table.h> 17 #include <asm/ioapic.h> 18 #include <asm/lapic.h> 19 #include <asm/mpspec.h> 20 #include <asm/tables.h> 21 #include <asm/arch/global_nvs.h> 22 23 /* 24 * IASL compiles the dsdt entries and writes the hex values 25 * to a C array AmlCode[] (see dsdt.c). 26 */ 27 extern const unsigned char AmlCode[]; 28 29 /* ACPI RSDP address to be used in boot parameters */ 30 static ulong acpi_rsdp_addr; 31 32 static void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt, 33 struct acpi_xsdt *xsdt) 34 { 35 memset(rsdp, 0, sizeof(struct acpi_rsdp)); 36 37 memcpy(rsdp->signature, RSDP_SIG, 8); 38 memcpy(rsdp->oem_id, OEM_ID, 6); 39 40 rsdp->length = sizeof(struct acpi_rsdp); 41 rsdp->rsdt_address = (u32)rsdt; 42 43 /* 44 * Revision: ACPI 1.0: 0, ACPI 2.0/3.0/4.0: 2 45 * 46 * Some OSes expect an XSDT to be present for RSD PTR revisions >= 2. 47 * If we don't have an ACPI XSDT, force ACPI 1.0 (and thus RSD PTR 48 * revision 0) 49 */ 50 if (xsdt == NULL) { 51 rsdp->revision = ACPI_RSDP_REV_ACPI_1_0; 52 } else { 53 rsdp->xsdt_address = (u64)(u32)xsdt; 54 rsdp->revision = ACPI_RSDP_REV_ACPI_2_0; 55 } 56 57 /* Calculate checksums */ 58 rsdp->checksum = table_compute_checksum((void *)rsdp, 20); 59 rsdp->ext_checksum = table_compute_checksum((void *)rsdp, 60 sizeof(struct acpi_rsdp)); 61 } 62 63 void acpi_fill_header(struct acpi_table_header *header, char *signature) 64 { 65 memcpy(header->signature, signature, 4); 66 memcpy(header->oem_id, OEM_ID, 6); 67 memcpy(header->oem_table_id, OEM_TABLE_ID, 8); 68 header->oem_revision = U_BOOT_BUILD_DATE; 69 memcpy(header->aslc_id, ASLC_ID, 4); 70 } 71 72 static void acpi_write_rsdt(struct acpi_rsdt *rsdt) 73 { 74 struct acpi_table_header *header = &(rsdt->header); 75 76 /* Fill out header fields */ 77 acpi_fill_header(header, "RSDT"); 78 header->length = sizeof(struct acpi_rsdt); 79 header->revision = 1; 80 81 /* Entries are filled in later, we come with an empty set */ 82 83 /* Fix checksum */ 84 header->checksum = table_compute_checksum((void *)rsdt, 85 sizeof(struct acpi_rsdt)); 86 } 87 88 static void acpi_write_xsdt(struct acpi_xsdt *xsdt) 89 { 90 struct acpi_table_header *header = &(xsdt->header); 91 92 /* Fill out header fields */ 93 acpi_fill_header(header, "XSDT"); 94 header->length = sizeof(struct acpi_xsdt); 95 header->revision = 1; 96 97 /* Entries are filled in later, we come with an empty set */ 98 99 /* Fix checksum */ 100 header->checksum = table_compute_checksum((void *)xsdt, 101 sizeof(struct acpi_xsdt)); 102 } 103 104 /** 105 * Add an ACPI table to the RSDT (and XSDT) structure, recalculate length 106 * and checksum. 107 */ 108 static void acpi_add_table(struct acpi_rsdp *rsdp, void *table) 109 { 110 int i, entries_num; 111 struct acpi_rsdt *rsdt; 112 struct acpi_xsdt *xsdt = NULL; 113 114 /* The RSDT is mandatory while the XSDT is not */ 115 rsdt = (struct acpi_rsdt *)rsdp->rsdt_address; 116 117 if (rsdp->xsdt_address) 118 xsdt = (struct acpi_xsdt *)((u32)rsdp->xsdt_address); 119 120 /* This should always be MAX_ACPI_TABLES */ 121 entries_num = ARRAY_SIZE(rsdt->entry); 122 123 for (i = 0; i < entries_num; i++) { 124 if (rsdt->entry[i] == 0) 125 break; 126 } 127 128 if (i >= entries_num) { 129 debug("ACPI: Error: too many tables\n"); 130 return; 131 } 132 133 /* Add table to the RSDT */ 134 rsdt->entry[i] = (u32)table; 135 136 /* Fix RSDT length or the kernel will assume invalid entries */ 137 rsdt->header.length = sizeof(struct acpi_table_header) + 138 (sizeof(u32) * (i + 1)); 139 140 /* Re-calculate checksum */ 141 rsdt->header.checksum = 0; 142 rsdt->header.checksum = table_compute_checksum((u8 *)rsdt, 143 rsdt->header.length); 144 145 /* 146 * And now the same thing for the XSDT. We use the same index as for 147 * now we want the XSDT and RSDT to always be in sync in U-Boot 148 */ 149 if (xsdt) { 150 /* Add table to the XSDT */ 151 xsdt->entry[i] = (u64)(u32)table; 152 153 /* Fix XSDT length */ 154 xsdt->header.length = sizeof(struct acpi_table_header) + 155 (sizeof(u64) * (i + 1)); 156 157 /* Re-calculate checksum */ 158 xsdt->header.checksum = 0; 159 xsdt->header.checksum = table_compute_checksum((u8 *)xsdt, 160 xsdt->header.length); 161 } 162 } 163 164 static void acpi_create_facs(struct acpi_facs *facs) 165 { 166 memset((void *)facs, 0, sizeof(struct acpi_facs)); 167 168 memcpy(facs->signature, "FACS", 4); 169 facs->length = sizeof(struct acpi_facs); 170 facs->hardware_signature = 0; 171 facs->firmware_waking_vector = 0; 172 facs->global_lock = 0; 173 facs->flags = 0; 174 facs->x_firmware_waking_vector_l = 0; 175 facs->x_firmware_waking_vector_h = 0; 176 facs->version = 1; 177 } 178 179 static int acpi_create_madt_lapic(struct acpi_madt_lapic *lapic, 180 u8 cpu, u8 apic) 181 { 182 lapic->type = ACPI_APIC_LAPIC; 183 lapic->length = sizeof(struct acpi_madt_lapic); 184 lapic->flags = LOCAL_APIC_FLAG_ENABLED; 185 lapic->processor_id = cpu; 186 lapic->apic_id = apic; 187 188 return lapic->length; 189 } 190 191 int acpi_create_madt_lapics(u32 current) 192 { 193 struct udevice *dev; 194 int total_length = 0; 195 196 for (uclass_find_first_device(UCLASS_CPU, &dev); 197 dev; 198 uclass_find_next_device(&dev)) { 199 struct cpu_platdata *plat = dev_get_parent_platdata(dev); 200 int length = acpi_create_madt_lapic( 201 (struct acpi_madt_lapic *)current, 202 plat->cpu_id, plat->cpu_id); 203 current += length; 204 total_length += length; 205 } 206 207 return total_length; 208 } 209 210 int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id, 211 u32 addr, u32 gsi_base) 212 { 213 ioapic->type = ACPI_APIC_IOAPIC; 214 ioapic->length = sizeof(struct acpi_madt_ioapic); 215 ioapic->reserved = 0x00; 216 ioapic->gsi_base = gsi_base; 217 ioapic->ioapic_id = id; 218 ioapic->ioapic_addr = addr; 219 220 return ioapic->length; 221 } 222 223 int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride, 224 u8 bus, u8 source, u32 gsirq, u16 flags) 225 { 226 irqoverride->type = ACPI_APIC_IRQ_SRC_OVERRIDE; 227 irqoverride->length = sizeof(struct acpi_madt_irqoverride); 228 irqoverride->bus = bus; 229 irqoverride->source = source; 230 irqoverride->gsirq = gsirq; 231 irqoverride->flags = flags; 232 233 return irqoverride->length; 234 } 235 236 int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi, 237 u8 cpu, u16 flags, u8 lint) 238 { 239 lapic_nmi->type = ACPI_APIC_LAPIC_NMI; 240 lapic_nmi->length = sizeof(struct acpi_madt_lapic_nmi); 241 lapic_nmi->flags = flags; 242 lapic_nmi->processor_id = cpu; 243 lapic_nmi->lint = lint; 244 245 return lapic_nmi->length; 246 } 247 248 static int acpi_create_madt_irq_overrides(u32 current) 249 { 250 struct acpi_madt_irqoverride *irqovr; 251 u16 sci_flags = MP_IRQ_TRIGGER_LEVEL | MP_IRQ_POLARITY_HIGH; 252 int length = 0; 253 254 irqovr = (void *)current; 255 length += acpi_create_madt_irqoverride(irqovr, 0, 0, 2, 0); 256 257 irqovr = (void *)(current + length); 258 length += acpi_create_madt_irqoverride(irqovr, 0, 9, 9, sci_flags); 259 260 return length; 261 } 262 263 __weak u32 acpi_fill_madt(u32 current) 264 { 265 current += acpi_create_madt_lapics(current); 266 267 current += acpi_create_madt_ioapic((struct acpi_madt_ioapic *)current, 268 io_apic_read(IO_APIC_ID) >> 24, IO_APIC_ADDR, 0); 269 270 current += acpi_create_madt_irq_overrides(current); 271 272 return current; 273 } 274 275 static void acpi_create_madt(struct acpi_madt *madt) 276 { 277 struct acpi_table_header *header = &(madt->header); 278 u32 current = (u32)madt + sizeof(struct acpi_madt); 279 280 memset((void *)madt, 0, sizeof(struct acpi_madt)); 281 282 /* Fill out header fields */ 283 acpi_fill_header(header, "APIC"); 284 header->length = sizeof(struct acpi_madt); 285 header->revision = 4; 286 287 madt->lapic_addr = LAPIC_DEFAULT_BASE; 288 madt->flags = ACPI_MADT_PCAT_COMPAT; 289 290 current = acpi_fill_madt(current); 291 292 /* (Re)calculate length and checksum */ 293 header->length = current - (u32)madt; 294 295 header->checksum = table_compute_checksum((void *)madt, header->length); 296 } 297 298 int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, u32 base, 299 u16 seg_nr, u8 start, u8 end) 300 { 301 memset(mmconfig, 0, sizeof(*mmconfig)); 302 mmconfig->base_address_l = base; 303 mmconfig->base_address_h = 0; 304 mmconfig->pci_segment_group_number = seg_nr; 305 mmconfig->start_bus_number = start; 306 mmconfig->end_bus_number = end; 307 308 return sizeof(struct acpi_mcfg_mmconfig); 309 } 310 311 __weak u32 acpi_fill_mcfg(u32 current) 312 { 313 current += acpi_create_mcfg_mmconfig 314 ((struct acpi_mcfg_mmconfig *)current, 315 CONFIG_PCIE_ECAM_BASE, 0x0, 0x0, 255); 316 317 return current; 318 } 319 320 /* MCFG is defined in the PCI Firmware Specification 3.0 */ 321 static void acpi_create_mcfg(struct acpi_mcfg *mcfg) 322 { 323 struct acpi_table_header *header = &(mcfg->header); 324 u32 current = (u32)mcfg + sizeof(struct acpi_mcfg); 325 326 memset((void *)mcfg, 0, sizeof(struct acpi_mcfg)); 327 328 /* Fill out header fields */ 329 acpi_fill_header(header, "MCFG"); 330 header->length = sizeof(struct acpi_mcfg); 331 header->revision = 1; 332 333 current = acpi_fill_mcfg(current); 334 335 /* (Re)calculate length and checksum */ 336 header->length = current - (u32)mcfg; 337 header->checksum = table_compute_checksum((void *)mcfg, header->length); 338 } 339 340 static void acpi_create_spcr(struct acpi_spcr *spcr) 341 { 342 struct acpi_table_header *header = &(spcr->header); 343 struct serial_device_info serial_info = {0}; 344 ulong serial_address, serial_offset; 345 struct udevice *dev; 346 uint serial_config; 347 uint serial_width; 348 int access_size; 349 int space_id; 350 int ret; 351 352 /* Fill out header fields */ 353 acpi_fill_header(header, "SPCR"); 354 header->length = sizeof(struct acpi_spcr); 355 header->revision = 2; 356 357 /* Read the device once, here. It is reused below */ 358 ret = uclass_first_device_err(UCLASS_SERIAL, &dev); 359 if (!ret) 360 ret = serial_getinfo(dev, &serial_info); 361 if (ret) 362 serial_info.type = SERIAL_CHIP_UNKNOWN; 363 364 /* Encode chip type */ 365 switch (serial_info.type) { 366 case SERIAL_CHIP_16550_COMPATIBLE: 367 spcr->interface_type = ACPI_DBG2_16550_COMPATIBLE; 368 break; 369 case SERIAL_CHIP_UNKNOWN: 370 default: 371 spcr->interface_type = ACPI_DBG2_UNKNOWN; 372 break; 373 } 374 375 /* Encode address space */ 376 switch (serial_info.addr_space) { 377 case SERIAL_ADDRESS_SPACE_MEMORY: 378 space_id = ACPI_ADDRESS_SPACE_MEMORY; 379 break; 380 case SERIAL_ADDRESS_SPACE_IO: 381 default: 382 space_id = ACPI_ADDRESS_SPACE_IO; 383 break; 384 } 385 386 serial_width = serial_info.reg_width * 8; 387 serial_offset = serial_info.reg_offset << serial_info.reg_shift; 388 serial_address = serial_info.addr + serial_offset; 389 390 /* Encode register access size */ 391 switch (serial_info.reg_shift) { 392 case 0: 393 access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS; 394 break; 395 case 1: 396 access_size = ACPI_ACCESS_SIZE_WORD_ACCESS; 397 break; 398 case 2: 399 access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS; 400 break; 401 case 3: 402 access_size = ACPI_ACCESS_SIZE_QWORD_ACCESS; 403 break; 404 default: 405 access_size = ACPI_ACCESS_SIZE_UNDEFINED; 406 break; 407 } 408 409 debug("UART type %u @ %lx\n", spcr->interface_type, serial_address); 410 411 /* Fill GAS */ 412 spcr->serial_port.space_id = space_id; 413 spcr->serial_port.bit_width = serial_width; 414 spcr->serial_port.bit_offset = 0; 415 spcr->serial_port.access_size = access_size; 416 spcr->serial_port.addrl = lower_32_bits(serial_address); 417 spcr->serial_port.addrh = upper_32_bits(serial_address); 418 419 /* Encode baud rate */ 420 switch (serial_info.baudrate) { 421 case 9600: 422 spcr->baud_rate = 3; 423 break; 424 case 19200: 425 spcr->baud_rate = 4; 426 break; 427 case 57600: 428 spcr->baud_rate = 6; 429 break; 430 case 115200: 431 spcr->baud_rate = 7; 432 break; 433 default: 434 spcr->baud_rate = 0; 435 break; 436 } 437 438 serial_config = SERIAL_DEFAULT_CONFIG; 439 if (dev) 440 ret = serial_getconfig(dev, &serial_config); 441 442 spcr->parity = SERIAL_GET_PARITY(serial_config); 443 spcr->stop_bits = SERIAL_GET_STOP(serial_config); 444 445 /* No PCI devices for now */ 446 spcr->pci_device_id = 0xffff; 447 spcr->pci_vendor_id = 0xffff; 448 449 /* Fix checksum */ 450 header->checksum = table_compute_checksum((void *)spcr, header->length); 451 } 452 453 /* 454 * QEMU's version of write_acpi_tables is defined in drivers/misc/qfw.c 455 */ 456 ulong write_acpi_tables(ulong start) 457 { 458 u32 current; 459 struct acpi_rsdp *rsdp; 460 struct acpi_rsdt *rsdt; 461 struct acpi_xsdt *xsdt; 462 struct acpi_facs *facs; 463 struct acpi_table_header *dsdt; 464 struct acpi_fadt *fadt; 465 struct acpi_mcfg *mcfg; 466 struct acpi_madt *madt; 467 struct acpi_spcr *spcr; 468 int i; 469 470 current = start; 471 472 /* Align ACPI tables to 16 byte */ 473 current = ALIGN(current, 16); 474 475 debug("ACPI: Writing ACPI tables at %lx\n", start); 476 477 /* We need at least an RSDP and an RSDT Table */ 478 rsdp = (struct acpi_rsdp *)current; 479 current += sizeof(struct acpi_rsdp); 480 current = ALIGN(current, 16); 481 rsdt = (struct acpi_rsdt *)current; 482 current += sizeof(struct acpi_rsdt); 483 current = ALIGN(current, 16); 484 xsdt = (struct acpi_xsdt *)current; 485 current += sizeof(struct acpi_xsdt); 486 /* 487 * Per ACPI spec, the FACS table address must be aligned to a 64 byte 488 * boundary (Windows checks this, but Linux does not). 489 */ 490 current = ALIGN(current, 64); 491 492 /* clear all table memory */ 493 memset((void *)start, 0, current - start); 494 495 acpi_write_rsdp(rsdp, rsdt, xsdt); 496 acpi_write_rsdt(rsdt); 497 acpi_write_xsdt(xsdt); 498 499 debug("ACPI: * FACS\n"); 500 facs = (struct acpi_facs *)current; 501 current += sizeof(struct acpi_facs); 502 current = ALIGN(current, 16); 503 504 acpi_create_facs(facs); 505 506 debug("ACPI: * DSDT\n"); 507 dsdt = (struct acpi_table_header *)current; 508 memcpy(dsdt, &AmlCode, sizeof(struct acpi_table_header)); 509 current += sizeof(struct acpi_table_header); 510 memcpy((char *)current, 511 (char *)&AmlCode + sizeof(struct acpi_table_header), 512 dsdt->length - sizeof(struct acpi_table_header)); 513 current += dsdt->length - sizeof(struct acpi_table_header); 514 current = ALIGN(current, 16); 515 516 /* Pack GNVS into the ACPI table area */ 517 for (i = 0; i < dsdt->length; i++) { 518 u32 *gnvs = (u32 *)((u32)dsdt + i); 519 if (*gnvs == ACPI_GNVS_ADDR) { 520 debug("Fix up global NVS in DSDT to 0x%08x\n", current); 521 *gnvs = current; 522 break; 523 } 524 } 525 526 /* Update DSDT checksum since we patched the GNVS address */ 527 dsdt->checksum = 0; 528 dsdt->checksum = table_compute_checksum((void *)dsdt, dsdt->length); 529 530 /* Fill in platform-specific global NVS variables */ 531 acpi_create_gnvs((struct acpi_global_nvs *)current); 532 current += sizeof(struct acpi_global_nvs); 533 current = ALIGN(current, 16); 534 535 debug("ACPI: * FADT\n"); 536 fadt = (struct acpi_fadt *)current; 537 current += sizeof(struct acpi_fadt); 538 current = ALIGN(current, 16); 539 acpi_create_fadt(fadt, facs, dsdt); 540 acpi_add_table(rsdp, fadt); 541 542 debug("ACPI: * MADT\n"); 543 madt = (struct acpi_madt *)current; 544 acpi_create_madt(madt); 545 current += madt->header.length; 546 acpi_add_table(rsdp, madt); 547 current = ALIGN(current, 16); 548 549 debug("ACPI: * MCFG\n"); 550 mcfg = (struct acpi_mcfg *)current; 551 acpi_create_mcfg(mcfg); 552 current += mcfg->header.length; 553 acpi_add_table(rsdp, mcfg); 554 current = ALIGN(current, 16); 555 556 debug("ACPI: * SPCR\n"); 557 spcr = (struct acpi_spcr *)current; 558 acpi_create_spcr(spcr); 559 current += spcr->header.length; 560 acpi_add_table(rsdp, spcr); 561 current = ALIGN(current, 16); 562 563 debug("current = %x\n", current); 564 565 acpi_rsdp_addr = (unsigned long)rsdp; 566 debug("ACPI: done\n"); 567 568 return current; 569 } 570 571 ulong acpi_get_rsdp_addr(void) 572 { 573 return acpi_rsdp_addr; 574 } 575