// SPDX-License-Identifier: GPL-2.0+ /* * Generic code used to generate ACPI tables * * Copyright 2019 Google LLC */ #include #include #include #include #include #include #include #include #include #include #include /* * OEM_REVISION is 32-bit unsigned number. It should be increased only when * changing software version. Therefore it should not depend on build time. * U-Boot calculates it from U-Boot version and represent it in hexadecimal * notation. As U-Boot version is in form year.month set low 8 bits to 0x01 * to have valid date. So for U-Boot version 2021.04 OEM_REVISION is set to * value 0x20210401. */ #define OEM_REVISION ((((U_BOOT_VERSION_NUM / 1000) % 10) << 28) | \ (((U_BOOT_VERSION_NUM / 100) % 10) << 24) | \ (((U_BOOT_VERSION_NUM / 10) % 10) << 20) | \ ((U_BOOT_VERSION_NUM % 10) << 16) | \ (((U_BOOT_VERSION_NUM_PATCH / 10) % 10) << 12) | \ ((U_BOOT_VERSION_NUM_PATCH % 10) << 8) | \ 0x01) int acpi_create_dmar(struct acpi_dmar *dmar, enum dmar_flags flags) { struct acpi_table_header *header = &dmar->header; struct cpu_info info; struct udevice *cpu; int ret; ret = uclass_first_device(UCLASS_CPU, &cpu); if (ret) return log_msg_ret("cpu", ret); ret = cpu_get_info(cpu, &info); if (ret) return log_msg_ret("info", ret); memset((void *)dmar, 0, sizeof(struct acpi_dmar)); /* Fill out header fields. */ acpi_fill_header(&dmar->header, "DMAR"); header->length = sizeof(struct acpi_dmar); header->revision = acpi_get_table_revision(ACPITAB_DMAR); dmar->host_address_width = info.address_width - 1; dmar->flags = flags; return 0; } int acpi_get_table_revision(enum acpi_tables table) { switch (table) { case ACPITAB_FADT: return ACPI_FADT_REV_ACPI_3_0; case ACPITAB_MADT: return ACPI_MADT_REV_ACPI_3_0; case ACPITAB_MCFG: return ACPI_MCFG_REV_ACPI_3_0; case ACPITAB_TCPA: /* This version and the rest are open-coded */ return 2; case ACPITAB_TPM2: return 4; case ACPITAB_SSDT: /* ACPI 3.0 upto 6.3: 2 */ return 2; case ACPITAB_SRAT: /* ACPI 2.0: 1, ACPI 3.0: 2, ACPI 4.0 to 6.3: 3 */ return 1; /* TODO Should probably be upgraded to 2 */ case ACPITAB_DMAR: return 1; case ACPITAB_SLIT: /* ACPI 2.0 upto 6.3: 1 */ return 1; case ACPITAB_SPMI: /* IMPI 2.0 */ return 5; case ACPITAB_HPET: /* Currently 1. Table added in ACPI 2.0 */ return 1; case ACPITAB_VFCT: /* ACPI 2.0/3.0/4.0: 1 */ return 1; case ACPITAB_IVRS: return IVRS_FORMAT_FIXED; case ACPITAB_DBG2: return 0; case ACPITAB_FACS: /* ACPI 2.0/3.0: 1, ACPI 4.0 to 6.3: 2 */ return 1; case ACPITAB_RSDT: /* ACPI 1.0 upto 6.3: 1 */ return 1; case ACPITAB_XSDT: /* ACPI 2.0 upto 6.3: 1 */ return 1; case ACPITAB_RSDP: /* ACPI 2.0 upto 6.3: 2 */ return 2; case ACPITAB_HEST: return 1; case ACPITAB_NHLT: return 5; case ACPITAB_BERT: return 1; case ACPITAB_SPCR: return 2; default: return -EINVAL; } } void acpi_fill_header(struct acpi_table_header *header, char *signature) { memcpy(header->signature, signature, 4); memcpy(header->oem_id, OEM_ID, 6); memcpy(header->oem_table_id, OEM_TABLE_ID, 8); header->oem_revision = OEM_REVISION; memcpy(header->aslc_id, ASLC_ID, 4); } void acpi_align(struct acpi_ctx *ctx) { ctx->current = (void *)ALIGN((ulong)ctx->current, 16); } void acpi_align64(struct acpi_ctx *ctx) { ctx->current = (void *)ALIGN((ulong)ctx->current, 64); } void acpi_inc(struct acpi_ctx *ctx, uint amount) { ctx->current += amount; } void acpi_inc_align(struct acpi_ctx *ctx, uint amount) { ctx->current += amount; acpi_align(ctx); } /** * Add an ACPI table to the RSDT (and XSDT) structure, recalculate length * and checksum. */ int acpi_add_table(struct acpi_ctx *ctx, void *table) { int i, entries_num; struct acpi_rsdt *rsdt; struct acpi_xsdt *xsdt; /* The RSDT is mandatory while the XSDT is not */ rsdt = ctx->rsdt; /* This should always be MAX_ACPI_TABLES */ entries_num = ARRAY_SIZE(rsdt->entry); for (i = 0; i < entries_num; i++) { if (rsdt->entry[i] == 0) break; } if (i >= entries_num) { log_err("ACPI: Error: too many tables\n"); return -E2BIG; } /* Add table to the RSDT */ rsdt->entry[i] = map_to_sysmem(table); /* Fix RSDT length or the kernel will assume invalid entries */ rsdt->header.length = sizeof(struct acpi_table_header) + (sizeof(u32) * (i + 1)); /* Re-calculate checksum */ rsdt->header.checksum = 0; rsdt->header.checksum = table_compute_checksum((u8 *)rsdt, rsdt->header.length); /* * And now the same thing for the XSDT. We use the same index as for * now we want the XSDT and RSDT to always be in sync in U-Boot */ xsdt = ctx->xsdt; /* Add table to the XSDT */ xsdt->entry[i] = map_to_sysmem(table); /* Fix XSDT length */ xsdt->header.length = sizeof(struct acpi_table_header) + (sizeof(u64) * (i + 1)); /* Re-calculate checksum */ xsdt->header.checksum = 0; xsdt->header.checksum = table_compute_checksum((u8 *)xsdt, xsdt->header.length); return 0; } void acpi_create_dbg2(struct acpi_dbg2_header *dbg2, int port_type, int port_subtype, struct acpi_gen_regaddr *address, u32 address_size, const char *device_path) { uintptr_t current; struct acpi_dbg2_device *device; u32 *dbg2_addr_size; struct acpi_table_header *header; size_t path_len; const char *path; char *namespace; /* Fill out header fields. */ current = (uintptr_t)dbg2; memset(dbg2, '\0', sizeof(struct acpi_dbg2_header)); header = &dbg2->header; header->revision = acpi_get_table_revision(ACPITAB_DBG2); acpi_fill_header(header, "DBG2"); header->aslc_revision = ASL_REVISION; /* One debug device defined */ dbg2->devices_offset = sizeof(struct acpi_dbg2_header); dbg2->devices_count = 1; current += sizeof(struct acpi_dbg2_header); /* Device comes after the header */ device = (struct acpi_dbg2_device *)current; memset(device, 0, sizeof(struct acpi_dbg2_device)); current += sizeof(struct acpi_dbg2_device); device->revision = 0; device->address_count = 1; device->port_type = port_type; device->port_subtype = port_subtype; /* Base Address comes after device structure */ memcpy((void *)current, address, sizeof(struct acpi_gen_regaddr)); device->base_address_offset = current - (uintptr_t)device; current += sizeof(struct acpi_gen_regaddr); /* Address Size comes after address structure */ dbg2_addr_size = (uint32_t *)current; device->address_size_offset = current - (uintptr_t)device; *dbg2_addr_size = address_size; current += sizeof(uint32_t); /* Namespace string comes last, use '.' if not provided */ path = device_path ? : "."; /* Namespace string length includes NULL terminator */ path_len = strlen(path) + 1; namespace = (char *)current; device->namespace_string_length = path_len; device->namespace_string_offset = current - (uintptr_t)device; strncpy(namespace, path, path_len); current += path_len; /* Update structure lengths and checksum */ device->length = current - (uintptr_t)device; header->length = current - (uintptr_t)dbg2; header->checksum = table_compute_checksum(dbg2, header->length); }