diff options
Diffstat (limited to 'cmd/efi_common.c')
| -rw-r--r-- | cmd/efi_common.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/cmd/efi_common.c b/cmd/efi_common.c index d2f2b59e9e3..e57835d3bae 100644 --- a/cmd/efi_common.c +++ b/cmd/efi_common.c @@ -8,8 +8,60 @@ #include <efi.h> #include <efi_api.h> +#include <mapmem.h> #include <u-boot/uuid.h> +/* Width of an EFI physical address in hexadecimal digits */ +#define EFI_PHYS_ADDR_WIDTH (int)(sizeof(efi_physical_addr_t) * 2) + +/* Width of the memory type column, sized for the longest type name */ +#define EFI_MEM_TYPE_WIDTH 23 + +/* + * The type names of the UEFI specification without the leading 'Efi' and + * the trailing 'Type' + */ +static const char *const efi_mem_type_string[] = { + [EFI_RESERVED_MEMORY_TYPE] = "ReservedMemory", + [EFI_LOADER_CODE] = "LoaderCode", + [EFI_LOADER_DATA] = "LoaderData", + [EFI_BOOT_SERVICES_CODE] = "BootServicesCode", + [EFI_BOOT_SERVICES_DATA] = "BootServicesData", + [EFI_RUNTIME_SERVICES_CODE] = "RuntimeServicesCode", + [EFI_RUNTIME_SERVICES_DATA] = "RuntimeServicesData", + [EFI_CONVENTIONAL_MEMORY] = "ConventionalMemory", + [EFI_UNUSABLE_MEMORY] = "UnusableMemory", + [EFI_ACPI_RECLAIM_MEMORY] = "ACPIReclaimMemory", + [EFI_ACPI_MEMORY_NVS] = "ACPIMemoryNVS", + [EFI_MMAP_IO] = "MemoryMappedIO", + [EFI_MMAP_IO_PORT] = "MemoryMappedIOPortSpace", + [EFI_PAL_CODE] = "PalCode", + [EFI_PERSISTENT_MEMORY_TYPE] = "PersistentMemory", + [EFI_UNACCEPTED_MEMORY_TYPE] = "UnacceptedMemory", +}; + +static const struct efi_mem_attrs { + const u64 bit; + const char *text; +} efi_mem_attrs[] = { + {EFI_MEMORY_UC, "UC"}, + {EFI_MEMORY_WC, "WC"}, + {EFI_MEMORY_WT, "WT"}, + {EFI_MEMORY_WB, "WB"}, + {EFI_MEMORY_UCE, "UCE"}, + {EFI_MEMORY_WP, "WP"}, + {EFI_MEMORY_RP, "RP"}, + {EFI_MEMORY_XP, "XP"}, + {EFI_MEMORY_NV, "NV"}, + {EFI_MEMORY_MORE_RELIABLE, "REL"}, + {EFI_MEMORY_RO, "RO"}, + {EFI_MEMORY_SP, "SP"}, + {EFI_MEMORY_CPU_CRYPTO, "CRYPT"}, + {EFI_MEMORY_HOT_PLUGGABLE, "HOTPL"}, + {EFI_MEMORY_ISA_VALID, "ISA_VALID"}, + {EFI_MEMORY_RUNTIME, "RT"}, +}; + void efi_show_tables(struct efi_system_table *systab) { int i; @@ -21,3 +73,88 @@ void efi_show_tables(struct efi_system_table *systab) uuid_guid_get_str(tab->guid.b) ?: "(unknown)"); } } + +/** + * efi_mem_type_name() - get the name of an EFI memory type + * + * @type: memory type (enum efi_memory_type) + * Return: name of the memory type, or NULL if @type is unknown + */ +static const char *efi_mem_type_name(u32 type) +{ + if (type >= ARRAY_SIZE(efi_mem_type_string)) + return NULL; + + return efi_mem_type_string[type]; +} + +/** + * efi_print_mem_attrs() - print the names of set EFI memory attributes + * + * Prints the set attribute bits as a '|'-separated list of mnemonics, + * e.g. ' UC|WB|RT', preceded by a space. When EFI_MEMORY_ISA_VALID is + * set, the EFI_MEMORY_ISA_MASK field is printed as ISA=<value>. Bits + * that have no mnemonic are printed as a hexadecimal value so that + * invalid or not yet known attributes are never dropped silently. + * + * @attributes: memory attributes (EFI_MEMORY_...) + */ +static void efi_print_mem_attrs(u64 attributes) +{ + u64 unknown = attributes; + int sep, i; + + for (sep = 0, i = 0; i < ARRAY_SIZE(efi_mem_attrs); i++) + if (attributes & efi_mem_attrs[i].bit) { + if (sep) { + putc('|'); + } else { + putc(' '); + sep = 1; + } + puts(efi_mem_attrs[i].text); + unknown &= ~efi_mem_attrs[i].bit; + } + + if (attributes & EFI_MEMORY_ISA_VALID) { + printf("%sISA=0x%llx", sep ? "|" : " ", + (attributes & EFI_MEMORY_ISA_MASK) >> + EFI_MEMORY_ISA_SHIFT); + sep = 1; + unknown &= ~EFI_MEMORY_ISA_MASK; + } + + if (unknown) + printf("%s0x%llx", sep ? "|" : " ", unknown); +} + +void efi_show_memmap(struct efi_mem_desc *map, efi_uintn_t map_size, + efi_uintn_t desc_size) +{ + struct efi_mem_desc *end = (void *)map + map_size; + static const char sep[] = "========================"; + const char *type; + + printf("%-*s %-*s %-*s Attributes\n", + EFI_MEM_TYPE_WIDTH, "Type", + EFI_PHYS_ADDR_WIDTH, "Start", EFI_PHYS_ADDR_WIDTH, "End"); + printf("%.*s %.*s %.*s ==========\n", + EFI_MEM_TYPE_WIDTH, sep, + EFI_PHYS_ADDR_WIDTH, sep, EFI_PHYS_ADDR_WIDTH, sep); + + for (; map < end; map = efi_get_next_mem_desc(map, desc_size)) { + type = efi_mem_type_name(map->type) ?: "(unknown)"; + + printf("%-*s %.*llx-%.*llx", EFI_MEM_TYPE_WIDTH, type, + EFI_PHYS_ADDR_WIDTH, + (u64)map_to_sysmem((void *)(uintptr_t) + map->physical_start), + EFI_PHYS_ADDR_WIDTH, + (u64)map_to_sysmem((void *)(uintptr_t) + (map->physical_start + + map->num_pages * EFI_PAGE_SIZE))); + + efi_print_mem_attrs(map->attribute); + putc('\n'); + } +} |