// SPDX-License-Identifier: GPL-2.0+ /* * Based on acpi.c from coreboot * * Copyright (C) 2015, Saket Sinha * Copyright (C) 2016, Bin Meng */ #define LOG_CATEGORY LOGC_ACPI #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * IASL compiles the dsdt entries and writes the hex values * to a C array AmlCode[] (see dsdt.c). */ extern const unsigned char AmlCode[]; /* ACPI RSDP address to be used in boot parameters */ static ulong acpi_rsdp_addr; static void acpi_create_facs(struct acpi_facs *facs) { memset((void *)facs, 0, sizeof(struct acpi_facs)); memcpy(facs->signature, "FACS", 4); facs->length = sizeof(struct acpi_facs); facs->hardware_signature = 0; facs->firmware_waking_vector = 0; facs->global_lock = 0; facs->flags = 0; facs->x_firmware_waking_vector_l = 0; facs->x_firmware_waking_vector_h = 0; facs->version = 1; } static int acpi_create_madt_lapic(struct acpi_madt_lapic *lapic, u8 cpu, u8 apic) { lapic->type = ACPI_APIC_LAPIC; lapic->length = sizeof(struct acpi_madt_lapic); lapic->flags = LOCAL_APIC_FLAG_ENABLED; lapic->processor_id = cpu; lapic->apic_id = apic; return lapic->length; } int acpi_create_madt_lapics(u32 current) { struct udevice *dev; int total_length = 0; int cpu_num = 0; for (uclass_find_first_device(UCLASS_CPU, &dev); dev; uclass_find_next_device(&dev)) { struct cpu_platdata *plat = dev_get_parent_platdata(dev); int length; length = acpi_create_madt_lapic( (struct acpi_madt_lapic *)current, cpu_num++, plat->cpu_id); current += length; total_length += length; } return total_length; } int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id, u32 addr, u32 gsi_base) { ioapic->type = ACPI_APIC_IOAPIC; ioapic->length = sizeof(struct acpi_madt_ioapic); ioapic->reserved = 0x00; ioapic->gsi_base = gsi_base; ioapic->ioapic_id = id; ioapic->ioapic_addr = addr; return ioapic->length; } int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride, u8 bus, u8 source, u32 gsirq, u16 flags) { irqoverride->type = ACPI_APIC_IRQ_SRC_OVERRIDE; irqoverride->length = sizeof(struct acpi_madt_irqoverride); irqoverride->bus = bus; irqoverride->source = source; irqoverride->gsirq = gsirq; irqoverride->flags = flags; return irqoverride->length; } int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi, u8 cpu, u16 flags, u8 lint) { lapic_nmi->type = ACPI_APIC_LAPIC_NMI; lapic_nmi->length = sizeof(struct acpi_madt_lapic_nmi); lapic_nmi->flags = flags; lapic_nmi->processor_id = cpu; lapic_nmi->lint = lint; return lapic_nmi->length; } static int acpi_create_madt_irq_overrides(u32 current) { struct acpi_madt_irqoverride *irqovr; u16 sci_flags = MP_IRQ_TRIGGER_LEVEL | MP_IRQ_POLARITY_HIGH; int length = 0; irqovr = (void *)current; length += acpi_create_madt_irqoverride(irqovr, 0, 0, 2, 0); irqovr = (void *)(current + length); length += acpi_create_madt_irqoverride(irqovr, 0, 9, 9, sci_flags); return length; } __weak u32 acpi_fill_madt(u32 current) { current += acpi_create_madt_lapics(current); current += acpi_create_madt_ioapic((struct acpi_madt_ioapic *)current, io_apic_read(IO_APIC_ID) >> 24, IO_APIC_ADDR, 0); current += acpi_create_madt_irq_overrides(current); return current; } static void acpi_create_madt(struct acpi_madt *madt) { struct acpi_table_header *header = &(madt->header); u32 current = (u32)madt + sizeof(struct acpi_madt); memset((void *)madt, 0, sizeof(struct acpi_madt)); /* Fill out header fields */ acpi_fill_header(header, "APIC"); header->length = sizeof(struct acpi_madt); header->revision = ACPI_MADT_REV_ACPI_3_0; madt->lapic_addr = LAPIC_DEFAULT_BASE; madt->flags = ACPI_MADT_PCAT_COMPAT; current = acpi_fill_madt(current); /* (Re)calculate length and checksum */ header->length = current - (u32)madt; header->checksum = table_compute_checksum((void *)madt, header->length); } int acpi_create_mcfg_mmconfig(struct acpi_mcfg_mmconfig *mmconfig, u32 base, u16 seg_nr, u8 start, u8 end) { memset(mmconfig, 0, sizeof(*mmconfig)); mmconfig->base_address_l = base; mmconfig->base_address_h = 0; mmconfig->pci_segment_group_number = seg_nr; mmconfig->start_bus_number = start; mmconfig->end_bus_number = end; return sizeof(struct acpi_mcfg_mmconfig); } __weak u32 acpi_fill_mcfg(u32 current) { current += acpi_create_mcfg_mmconfig ((struct acpi_mcfg_mmconfig *)current, CONFIG_PCIE_ECAM_BASE, 0x0, 0x0, 255); return current; } /* MCFG is defined in the PCI Firmware Specification 3.0 */ static void acpi_create_mcfg(struct acpi_mcfg *mcfg) { struct acpi_table_header *header = &(mcfg->header); u32 current = (u32)mcfg + sizeof(struct acpi_mcfg); memset((void *)mcfg, 0, sizeof(struct acpi_mcfg)); /* Fill out header fields */ acpi_fill_header(header, "MCFG"); header->length = sizeof(struct acpi_mcfg); header->revision = 1; current = acpi_fill_mcfg(current); /* (Re)calculate length and checksum */ header->length = current - (u32)mcfg; header->checksum = table_compute_checksum((void *)mcfg, header->length); } /** * acpi_create_tcpa() - Create a TCPA table * * @tcpa: Pointer to place to put table * * Trusted Computing Platform Alliance Capabilities Table * TCPA PC Specific Implementation SpecificationTCPA is defined in the PCI * Firmware Specification 3.0 */ static int acpi_create_tcpa(struct acpi_tcpa *tcpa) { struct acpi_table_header *header = &tcpa->header; u32 current = (u32)tcpa + sizeof(struct acpi_tcpa); int size = 0x10000; /* Use this as the default size */ void *log; int ret; if (!CONFIG_IS_ENABLED(BLOBLIST)) return -ENXIO; memset(tcpa, '\0', sizeof(struct acpi_tcpa)); /* Fill out header fields */ acpi_fill_header(header, "TCPA"); header->length = sizeof(struct acpi_tcpa); header->revision = 1; ret = bloblist_ensure_size_ret(BLOBLISTT_TCPA_LOG, &size, &log); if (ret) return log_msg_ret("blob", ret); tcpa->platform_class = 0; tcpa->laml = size; tcpa->lasa = (ulong)log; /* (Re)calculate length and checksum */ header->length = current - (u32)tcpa; header->checksum = table_compute_checksum((void *)tcpa, header->length); return 0; } static int get_tpm2_log(void **ptrp, int *sizep) { const int tpm2_default_log_len = 0x10000; int size; int ret; *sizep = 0; size = tpm2_default_log_len; ret = bloblist_ensure_size_ret(BLOBLISTT_TPM2_TCG_LOG, &size, ptrp); if (ret) return log_msg_ret("blob", ret); *sizep = size; return 0; } static int acpi_create_tpm2(struct acpi_tpm2 *tpm2) { struct acpi_table_header *header = &tpm2->header; int tpm2_log_len; void *lasa; int ret; memset((void *)tpm2, 0, sizeof(struct acpi_tpm2)); /* * Some payloads like SeaBIOS depend on log area to use TPM2. * Get the memory size and address of TPM2 log area or initialize it. */ ret = get_tpm2_log(&lasa, &tpm2_log_len); if (ret) return ret; /* Fill out header fields. */ acpi_fill_header(header, "TPM2"); memcpy(header->aslc_id, ASLC_ID, 4); header->length = sizeof(struct acpi_tpm2); header->revision = acpi_get_table_revision(ACPITAB_TPM2); /* Hard to detect for coreboot. Just set it to 0 */ tpm2->platform_class = 0; /* Must be set to 0 for FIFO-interface support */ tpm2->control_area = 0; tpm2->start_method = 6; memset(tpm2->msp, 0, sizeof(tpm2->msp)); /* Fill the log area size and start address fields. */ tpm2->laml = tpm2_log_len; tpm2->lasa = (uintptr_t)lasa; /* Calculate checksum. */ header->checksum = table_compute_checksum((void *)tpm2, header->length); return 0; } __weak u32 acpi_fill_csrt(u32 current) { return 0; } static int acpi_create_csrt(struct acpi_csrt *csrt) { struct acpi_table_header *header = &(csrt->header); u32 current = (u32)csrt + sizeof(struct acpi_csrt); uint ptr; memset((void *)csrt, 0, sizeof(struct acpi_csrt)); /* Fill out header fields */ acpi_fill_header(header, "CSRT"); header->length = sizeof(struct acpi_csrt); header->revision = 0; ptr = acpi_fill_csrt(current); if (!ptr) return -ENOENT; current = ptr; /* (Re)calculate length and checksum */ header->length = current - (u32)csrt; header->checksum = table_compute_checksum((void *)csrt, header->length); return 0; } static void acpi_create_spcr(struct acpi_spcr *spcr) { struct acpi_table_header *header = &(spcr->header); struct serial_device_info serial_info = {0}; ulong serial_address, serial_offset; struct udevice *dev; uint serial_config; uint serial_width; int access_size; int space_id; int ret = -ENODEV; memset((void *)spcr, 0, sizeof(struct acpi_spcr)); /* Fill out header fields */ acpi_fill_header(header, "SPCR"); header->length = sizeof(struct acpi_spcr); header->revision = 2; /* Read the device once, here. It is reused below */ dev = gd->cur_serial_dev; if (dev) ret = serial_getinfo(dev, &serial_info); if (ret) serial_info.type = SERIAL_CHIP_UNKNOWN; /* Encode chip type */ switch (serial_info.type) { case SERIAL_CHIP_16550_COMPATIBLE: spcr->interface_type = ACPI_DBG2_16550_COMPATIBLE; break; case SERIAL_CHIP_UNKNOWN: default: spcr->interface_type = ACPI_DBG2_UNKNOWN; break; } /* Encode address space */ switch (serial_info.addr_space) { case SERIAL_ADDRESS_SPACE_MEMORY: space_id = ACPI_ADDRESS_SPACE_MEMORY; break; case SERIAL_ADDRESS_SPACE_IO: default: space_id = ACPI_ADDRESS_SPACE_IO; break; } serial_width = serial_info.reg_width * 8; serial_offset = serial_info.reg_offset << serial_info.reg_shift; serial_address = serial_info.addr + serial_offset; /* Encode register access size */ switch (serial_info.reg_shift) { case 0: access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS; break; case 1: access_size = ACPI_ACCESS_SIZE_WORD_ACCESS; break; case 2: access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS; break; case 3: access_size = ACPI_ACCESS_SIZE_QWORD_ACCESS; break; default: access_size = ACPI_ACCESS_SIZE_UNDEFINED; break; } debug("UART type %u @ %lx\n", spcr->interface_type, serial_address); /* Fill GAS */ spcr->serial_port.space_id = space_id; spcr->serial_port.bit_width = serial_width; spcr->serial_port.bit_offset = 0; spcr->serial_port.access_size = access_size; spcr->serial_port.addrl = lower_32_bits(serial_address); spcr->serial_port.addrh = upper_32_bits(serial_address); /* Encode baud rate */ switch (serial_info.baudrate) { case 9600: spcr->baud_rate = 3; break; case 19200: spcr->baud_rate = 4; break; case 57600: spcr->baud_rate = 6; break; case 115200: spcr->baud_rate = 7; break; default: spcr->baud_rate = 0; break; } serial_config = SERIAL_DEFAULT_CONFIG; if (dev) ret = serial_getconfig(dev, &serial_config); spcr->parity = SERIAL_GET_PARITY(serial_config); spcr->stop_bits = SERIAL_GET_STOP(serial_config); /* No PCI devices for now */ spcr->pci_device_id = 0xffff; spcr->pci_vendor_id = 0xffff; /* * SPCR has no clue if the UART base clock speed is different * to the default one. However, the SPCR 1.04 defines baud rate * 0 as a preconfigured state of UART and OS is supposed not * to touch the configuration of the serial device. */ if (serial_info.clock != SERIAL_DEFAULT_CLOCK) spcr->baud_rate = 0; /* Fix checksum */ header->checksum = table_compute_checksum((void *)spcr, header->length); } static int acpi_create_ssdt(struct acpi_ctx *ctx, struct acpi_table_header *ssdt, const char *oem_table_id) { memset((void *)ssdt, '\0', sizeof(struct acpi_table_header)); acpi_fill_header(ssdt, "SSDT"); ssdt->revision = acpi_get_table_revision(ACPITAB_SSDT); ssdt->aslc_revision = 1; ssdt->length = sizeof(struct acpi_table_header); acpi_inc(ctx, sizeof(struct acpi_table_header)); acpi_fill_ssdt(ctx); /* (Re)calculate length and checksum */ ssdt->length = ctx->current - (void *)ssdt; ssdt->checksum = table_compute_checksum((void *)ssdt, ssdt->length); log_debug("SSDT at %p, length %x\n", ssdt, ssdt->length); /* Drop the table if it is empty */ if (ssdt->length == sizeof(struct acpi_table_header)) { ctx->current = ssdt; return -ENOENT; } acpi_align(ctx); return 0; } /* * QEMU's version of write_acpi_tables is defined in drivers/misc/qfw.c */ ulong write_acpi_tables(ulong start_addr) { const int thl = sizeof(struct acpi_table_header); struct acpi_ctx *ctx; struct acpi_facs *facs; struct acpi_table_header *dsdt; struct acpi_fadt *fadt; struct acpi_table_header *ssdt; struct acpi_mcfg *mcfg; struct acpi_tcpa *tcpa; struct acpi_madt *madt; struct acpi_csrt *csrt; struct acpi_spcr *spcr; void *start; int aml_len; ulong addr; int ret; int i; ctx = calloc(1, sizeof(*ctx)); if (!ctx) return log_msg_ret("mem", -ENOMEM); gd->acpi_ctx = ctx; start = map_sysmem(start_addr, 0); debug("ACPI: Writing ACPI tables at %lx\n", start_addr); acpi_reset_items(); acpi_setup_base_tables(ctx, start); debug("ACPI: * FACS\n"); facs = ctx->current; acpi_inc_align(ctx, sizeof(struct acpi_facs)); acpi_create_facs(facs); debug("ACPI: * DSDT\n"); dsdt = ctx->current; /* Put the table header first */ memcpy(dsdt, &AmlCode, thl); acpi_inc(ctx, thl); log_debug("DSDT starts at %p, hdr ends at %p\n", dsdt, ctx->current); /* If the table is not empty, allow devices to inject things */ aml_len = dsdt->length - thl; if (aml_len) { void *base = ctx->current; acpi_inject_dsdt(ctx); log_debug("Added %x bytes from inject_dsdt, now at %p\n", ctx->current - base, ctx->current); log_debug("Copy AML code size %x to %p\n", aml_len, ctx->current); memcpy(ctx->current, AmlCode + thl, aml_len); acpi_inc(ctx, aml_len); } dsdt->length = ctx->current - (void *)dsdt; acpi_align(ctx); log_debug("Updated DSDT length to %x, total %x\n", dsdt->length, ctx->current - (void *)dsdt); if (!IS_ENABLED(CONFIG_ACPI_GNVS_EXTERNAL)) { /* Pack GNVS into the ACPI table area */ for (i = 0; i < dsdt->length; i++) { u32 *gnvs = (u32 *)((u32)dsdt + i); if (*gnvs == ACPI_GNVS_ADDR) { *gnvs = map_to_sysmem(ctx->current); debug("Fix up global NVS in DSDT to %#08x\n", *gnvs); break; } } /* * Fill in platform-specific global NVS variables. If this fails * we cannot return the error but this should only happen while * debugging. */ addr = acpi_create_gnvs(ctx->current); if (IS_ERR_VALUE(addr)) printf("Error: Gailed to create GNVS\n"); acpi_inc_align(ctx, sizeof(struct acpi_global_nvs)); } /* * Recalculate the length and update the DSDT checksum since we patched * the GNVS address. Set the checksum to zero since it is part of the * region being checksummed. */ dsdt->checksum = 0; dsdt->checksum = table_compute_checksum((void *)dsdt, dsdt->length); /* * Fill in platform-specific global NVS variables. If this fails we * cannot return the error but this should only happen while debugging. */ addr = acpi_create_gnvs(ctx->current); if (IS_ERR_VALUE(addr)) printf("Error: Failed to create GNVS\n"); acpi_inc_align(ctx, sizeof(struct acpi_global_nvs)); debug("ACPI: * FADT\n"); fadt = ctx->current; acpi_inc_align(ctx, sizeof(struct acpi_fadt)); acpi_create_fadt(fadt, facs, dsdt); acpi_add_table(ctx, fadt); debug("ACPI: * SSDT\n"); ssdt = (struct acpi_table_header *)ctx->current; if (!acpi_create_ssdt(ctx, ssdt, OEM_TABLE_ID)) acpi_add_table(ctx, ssdt); debug("ACPI: * MCFG\n"); mcfg = ctx->current; acpi_create_mcfg(mcfg); acpi_inc_align(ctx, mcfg->header.length); acpi_add_table(ctx, mcfg); if (IS_ENABLED(CONFIG_TPM_V2)) { struct acpi_tpm2 *tpm2; debug("ACPI: * TPM2\n"); tpm2 = (struct acpi_tpm2 *)ctx->current; ret = acpi_create_tpm2(tpm2); if (!ret) { acpi_inc_align(ctx, tpm2->header.length); acpi_add_table(ctx, tpm2); } else { log_warning("TPM2 table creation failed\n"); } } debug("ACPI: * MADT\n"); madt = ctx->current; acpi_create_madt(madt); acpi_inc_align(ctx, madt->header.length); acpi_add_table(ctx, madt); debug("ACPI: * TCPA\n"); tcpa = (struct acpi_tcpa *)ctx->current; ret = acpi_create_tcpa(tcpa); if (ret) { log_warning("Failed to create TCPA table (err=%d)\n", ret); } else { acpi_inc_align(ctx, tcpa->header.length); acpi_add_table(ctx, tcpa); } debug("ACPI: * CSRT\n"); csrt = ctx->current; if (!acpi_create_csrt(csrt)) { acpi_inc_align(ctx, csrt->header.length); acpi_add_table(ctx, csrt); } debug("ACPI: * SPCR\n"); spcr = ctx->current; acpi_create_spcr(spcr); acpi_inc_align(ctx, spcr->header.length); acpi_add_table(ctx, spcr); acpi_write_dev_tables(ctx); addr = map_to_sysmem(ctx->current); debug("current = %lx\n", addr); acpi_rsdp_addr = (unsigned long)ctx->rsdp; debug("ACPI: done\n"); return addr; } ulong acpi_get_rsdp_addr(void) { return acpi_rsdp_addr; } /** * acpi_write_hpet() - Write out a HPET table * * Write out the table for High-Precision Event Timers * * @hpet: Place to put HPET table */ static int acpi_create_hpet(struct acpi_hpet *hpet) { struct acpi_table_header *header = &hpet->header; struct acpi_gen_regaddr *addr = &hpet->addr; /* * See IA-PC HPET (High Precision Event Timers) Specification v1.0a * https://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/software-developers-hpet-spec-1-0a.pdf */ memset((void *)hpet, '\0', sizeof(struct acpi_hpet)); /* Fill out header fields. */ acpi_fill_header(header, "HPET"); header->aslc_revision = ASL_REVISION; header->length = sizeof(struct acpi_hpet); header->revision = acpi_get_table_revision(ACPITAB_HPET); /* Fill out HPET address */ addr->space_id = 0; /* Memory */ addr->bit_width = 64; addr->bit_offset = 0; addr->addrl = CONFIG_HPET_ADDRESS & 0xffffffff; addr->addrh = ((unsigned long long)CONFIG_HPET_ADDRESS) >> 32; hpet->id = *(u32 *)CONFIG_HPET_ADDRESS; hpet->number = 0; hpet->min_tick = 0; /* HPET_MIN_TICKS */ header->checksum = table_compute_checksum(hpet, sizeof(struct acpi_hpet)); return 0; } int acpi_write_hpet(struct acpi_ctx *ctx) { struct acpi_hpet *hpet; int ret; log_debug("ACPI: * HPET\n"); hpet = ctx->current; acpi_inc_align(ctx, sizeof(struct acpi_hpet)); acpi_create_hpet(hpet); ret = acpi_add_table(ctx, hpet); if (ret) return log_msg_ret("add", ret); return 0; } int acpi_write_dbg2_pci_uart(struct acpi_ctx *ctx, struct udevice *dev, uint access_size) { struct acpi_dbg2_header *dbg2 = ctx->current; char path[ACPI_PATH_MAX]; struct acpi_gen_regaddr address; phys_addr_t addr; int ret; if (!device_active(dev)) { log_info("Device not enabled\n"); return -EACCES; } /* * PCI devices don't remember their resource allocation information in * U-Boot at present. We assume that MMIO is used for the UART and that * the address space is 32 bytes: ns16550 uses 8 registers of up to * 32-bits each. This is only for debugging so it is not a big deal. */ addr = dm_pci_read_bar32(dev, 0); printf("UART addr %lx\n", (ulong)addr); memset(&address, '\0', sizeof(address)); address.space_id = ACPI_ADDRESS_SPACE_MEMORY; address.addrl = (uint32_t)addr; address.addrh = (uint32_t)((addr >> 32) & 0xffffffff); address.access_size = access_size; ret = acpi_device_path(dev, path, sizeof(path)); if (ret) return log_msg_ret("path", ret); acpi_create_dbg2(dbg2, ACPI_DBG2_SERIAL_PORT, ACPI_DBG2_16550_COMPATIBLE, &address, 0x1000, path); acpi_inc_align(ctx, dbg2->header.length); acpi_add_table(ctx, dbg2); return 0; } void acpi_fadt_common(struct acpi_fadt *fadt, struct acpi_facs *facs, void *dsdt) { struct acpi_table_header *header = &fadt->header; memset((void *)fadt, '\0', sizeof(struct acpi_fadt)); acpi_fill_header(header, "FACP"); header->length = sizeof(struct acpi_fadt); header->revision = 4; memcpy(header->oem_id, OEM_ID, 6); memcpy(header->oem_table_id, OEM_TABLE_ID, 8); memcpy(header->aslc_id, ASLC_ID, 4); header->aslc_revision = 1; fadt->firmware_ctrl = (unsigned long)facs; fadt->dsdt = (unsigned long)dsdt; fadt->x_firmware_ctl_l = (unsigned long)facs; fadt->x_firmware_ctl_h = 0; fadt->x_dsdt_l = (unsigned long)dsdt; fadt->x_dsdt_h = 0; fadt->preferred_pm_profile = ACPI_PM_MOBILE; /* Use ACPI 3.0 revision */ fadt->header.revision = 4; } void acpi_create_dmar_drhd(struct acpi_ctx *ctx, uint flags, uint segment, u64 bar) { struct dmar_entry *drhd = ctx->current; memset(drhd, '\0', sizeof(*drhd)); drhd->type = DMAR_DRHD; drhd->length = sizeof(*drhd); /* will be fixed up later */ drhd->flags = flags; drhd->segment = segment; drhd->bar = bar; acpi_inc(ctx, drhd->length); } void acpi_create_dmar_rmrr(struct acpi_ctx *ctx, uint segment, u64 bar, u64 limit) { struct dmar_rmrr_entry *rmrr = ctx->current; memset(rmrr, '\0', sizeof(*rmrr)); rmrr->type = DMAR_RMRR; rmrr->length = sizeof(*rmrr); /* will be fixed up later */ rmrr->segment = segment; rmrr->bar = bar; rmrr->limit = limit; acpi_inc(ctx, rmrr->length); } void acpi_dmar_drhd_fixup(struct acpi_ctx *ctx, void *base) { struct dmar_entry *drhd = base; drhd->length = ctx->current - base; } void acpi_dmar_rmrr_fixup(struct acpi_ctx *ctx, void *base) { struct dmar_rmrr_entry *rmrr = base; rmrr->length = ctx->current - base; } static int acpi_create_dmar_ds(struct acpi_ctx *ctx, enum dev_scope_type type, uint enumeration_id, pci_dev_t bdf) { /* we don't support longer paths yet */ const size_t dev_scope_length = sizeof(struct dev_scope) + 2; struct dev_scope *ds = ctx->current; memset(ds, '\0', dev_scope_length); ds->type = type; ds->length = dev_scope_length; ds->enumeration = enumeration_id; ds->start_bus = PCI_BUS(bdf); ds->path[0].dev = PCI_DEV(bdf); ds->path[0].fn = PCI_FUNC(bdf); return ds->length; } int acpi_create_dmar_ds_pci_br(struct acpi_ctx *ctx, pci_dev_t bdf) { return acpi_create_dmar_ds(ctx, SCOPE_PCI_SUB, 0, bdf); } int acpi_create_dmar_ds_pci(struct acpi_ctx *ctx, pci_dev_t bdf) { return acpi_create_dmar_ds(ctx, SCOPE_PCI_ENDPOINT, 0, bdf); } int acpi_create_dmar_ds_ioapic(struct acpi_ctx *ctx, uint enumeration_id, pci_dev_t bdf) { return acpi_create_dmar_ds(ctx, SCOPE_IOAPIC, enumeration_id, bdf); } int acpi_create_dmar_ds_msi_hpet(struct acpi_ctx *ctx, uint enumeration_id, pci_dev_t bdf) { return acpi_create_dmar_ds(ctx, SCOPE_MSI_HPET, enumeration_id, bdf); }