"memmap" command prints uefi-specific memory map information. => efi memmap Type Start End Attributes ================ ================ ================ ========== CONVENTIONAL 0000000040000000-000000007de27000 WB RUNTIME DATA 000000007de27000-000000007de28000 WB|RT RESERVED 000000007de28000-000000007de2a000 WB RUNTIME DATA 000000007de2a000-000000007de2b000 WB|RT RESERVED 000000007de2b000-000000007de2c000 WB RUNTIME DATA 000000007de2c000-000000007de2d000 WB|RT LOADER DATA 000000007de2d000-000000007ff37000 WB RUNTIME CODE 000000007ff37000-000000007ff38000 WB|RT LOADER DATA 000000007ff38000-0000000080000000 WB
Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org Reviewed-by: Heinrich Schuchardt xypron.glpk@gmx.de --- cmd/efidebug.c | 127 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 126 insertions(+), 1 deletion(-)
diff --git a/cmd/efidebug.c b/cmd/efidebug.c index 3ff4abcb6859..b79a031aeed6 100644 --- a/cmd/efidebug.c +++ b/cmd/efidebug.c @@ -334,6 +334,127 @@ static int do_efi_show_images(cmd_tbl_t *cmdtp, int flag, return CMD_RET_SUCCESS; }
+static const char * const efi_mem_type_string[] = { + [EFI_RESERVED_MEMORY_TYPE] = "RESERVED", + [EFI_LOADER_CODE] = "LOADER CODE", + [EFI_LOADER_DATA] = "LOADER DATA", + [EFI_BOOT_SERVICES_CODE] = "BOOT CODE", + [EFI_BOOT_SERVICES_DATA] = "BOOT DATA", + [EFI_RUNTIME_SERVICES_CODE] = "RUNTIME CODE", + [EFI_RUNTIME_SERVICES_DATA] = "RUNTIME DATA", + [EFI_CONVENTIONAL_MEMORY] = "CONVENTIONAL", + [EFI_UNUSABLE_MEMORY] = "UNUSABLE MEM", + [EFI_ACPI_RECLAIM_MEMORY] = "ACPI RECLAIM MEM", + [EFI_ACPI_MEMORY_NVS] = "ACPI NVS", + [EFI_MMAP_IO] = "IO", + [EFI_MMAP_IO_PORT] = "IO PORT", + [EFI_PAL_CODE] = "PAL", +}; + +static const struct efi_mem_attrs { + const u64 bit; + const char *text; +} efi_mem_attrs[] = { + {EFI_MEMORY_UC, "UC"}, + {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, "WP"}, + {EFI_MEMORY_NV, "NV"}, + {EFI_MEMORY_MORE_RELIABLE, "REL"}, + {EFI_MEMORY_RO, "RO"}, + {EFI_MEMORY_RUNTIME, "RT"}, +}; + +/** + * print_memory_attributes() - print memory map attributes + * @attributes: Attribute value + * + * Print memory map attributes + */ +static void print_memory_attributes(u64 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); + } +} + +#define EFI_PHYS_ADDR_WIDTH (int)(sizeof(efi_physical_addr_t) * 2) + +/** + * do_efi_show_memmap() - show UEFI memory map + * + * @cmdtp: Command table + * @flag: Command flag + * @argc: Number of arguments + * @argv: Argument array + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure + * + * Implement efidebug "memmap" sub-command. + * Show UEFI memory map. + */ +static int do_efi_show_memmap(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + struct efi_mem_desc *memmap = NULL, *map; + efi_uintn_t map_size = 0; + const char *type; + int i; + efi_status_t ret; + + ret = EFI_CALL(BS->get_memory_map(&map_size, memmap, NULL, NULL, NULL)); + if (ret == EFI_BUFFER_TOO_SMALL) { + map_size += sizeof(struct efi_mem_desc); /* for my own */ + ret = EFI_CALL(BS->allocate_pool(EFI_LOADER_DATA, + map_size, (void *)&memmap)); + if (ret != EFI_SUCCESS) + return CMD_RET_FAILURE; + ret = EFI_CALL(BS->get_memory_map(&map_size, memmap, + NULL, NULL, NULL)); + } + if (ret != EFI_SUCCESS) { + EFI_CALL(BS->free_pool(memmap)); + return CMD_RET_FAILURE; + } + + printf("Type Start%.*s End%.*s Attributes\n", + EFI_PHYS_ADDR_WIDTH - 5, spc, EFI_PHYS_ADDR_WIDTH - 3, spc); + printf("================ %.*s %.*s ==========\n", + EFI_PHYS_ADDR_WIDTH, sep, EFI_PHYS_ADDR_WIDTH, sep); + for (i = 0, map = memmap; i < map_size / sizeof(*map); map++, i++) { + if (map->type < EFI_MAX_MEMORY_TYPE) + type = efi_mem_type_string[map->type]; + else + type = "(unknown)"; + + printf("%-16s %.*llx-%.*llx", type, + EFI_PHYS_ADDR_WIDTH, + map->physical_start, + EFI_PHYS_ADDR_WIDTH, + map->physical_start + map->num_pages * EFI_PAGE_SIZE); + + print_memory_attributes(map->attribute); + putc('\n'); + } + + EFI_CALL(BS->free_pool(memmap)); + + return CMD_RET_SUCCESS; +} + /** * do_efi_boot_add() - set UEFI load option * @@ -837,6 +958,8 @@ static cmd_tbl_t cmd_efidebug_sub[] = { "", ""), U_BOOT_CMD_MKENT(images, CONFIG_SYS_MAXARGS, 1, do_efi_show_images, "", ""), + U_BOOT_CMD_MKENT(memmap, CONFIG_SYS_MAXARGS, 1, do_efi_show_memmap, + "", ""), };
/** @@ -903,7 +1026,9 @@ static char efidebug_help_text[] = "efidebug dh\n" " - show uefi handles\n" "efidebug images\n" - " - show loaded images\n"; + " - show loaded images\n" + "efidebug memmap\n" + " - show uefi memory map\n"; #endif
U_BOOT_CMD(