[U-Boot] [PATCH v3 5/8] cmd: efishell: add memmap command

AKASHI Takahiro
2018-12-18T05:05:07Z

"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>
---
cmd/efishell.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 77 insertions(+), 1 deletion(-)

diff --git a/cmd/efishell.c b/cmd/efishell.c
index 010870df63c8..5a81a627d616 100644
--- a/cmd/efishell.c
+++ b/cmd/efishell.c
@@ -439,6 +439,78 @@ static int do_efi_show_images(int argc, char * const argv[])
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",
+};
+
+#define EFI_MEM_ATTR(attribute, bit, string) \
+ if ((attribute) & (bit)) { \
+ if (sep) \
+ putc('|'); \
+ sep = 1; \
+ printf(string); \
+ }
+
+static int do_efi_show_memmap(int argc, char * const argv[])
+{
+ struct efi_mem_desc *map = NULL;
+ efi_uintn_t map_size = 0;
+ int i, sep;
+ efi_status_t ret;
+
+ ret = efi_get_memory_map(&map_size, map, NULL, NULL, NULL);
+ if (ret == EFI_BUFFER_TOO_SMALL) {
+ map = malloc(map_size);
+ if (!map)
+ return CMD_RET_FAILURE;
+ ret = efi_get_memory_map(&map_size, map, NULL, NULL, NULL);
+ }
+ if (ret != EFI_SUCCESS) {
+ free(map);
+ return CMD_RET_FAILURE;
+ }
+
+ printf("Type Start End Attributes\n");
+ printf("================ ================ ================ ==========\n");
+ for (i = 0; i < map_size / sizeof(*map); map++, i++) {
+ sep = 0;
+ printf("%-16s %016llx-%016llx ",
+ efi_mem_type_string[map->type],
+ map->physical_start,
+ map->physical_start + map->num_pages * EFI_PAGE_SIZE);
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_UC, "UC");
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_WC, "WC");
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_WT, "WT");
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_WB, "WB");
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_UCE, "UCE");
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_WP, "WP");
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_RP, "RP");
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_XP, "WP");
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_NV, "NV");
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_MORE_RELIABLE, "REL");
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_RO, "RO");
+ EFI_MEM_ATTR(map->attribute, EFI_MEMORY_RUNTIME, "RT");
+ putc('\n');
+ }
+
+ free(map);
+
+ return CMD_RET_SUCCESS;
+}
+
static int do_efi_boot_add(int argc, char * const argv[])
{
int id;
@@ -826,6 +898,8 @@ static int do_efishell(cmd_tbl_t *cmdtp, int flag,
return do_efi_show_drivers(argc, argv);
else if (!strcmp(command, "images"))
return do_efi_show_images(argc, argv);
+ else if (!strcmp(command, "memmap"))
+ return do_efi_show_memmap(argc, argv);
else
return CMD_RET_USAGE;
}
@@ -853,7 +927,9 @@ static char efishell_help_text[] =
"efishell drivers\n"
" - show uefi drivers\n"
"efishell images\n"
- " - show loaded images\n";
+ " - show loaded images\n"
+ "efishell memmap\n"
+ " - show uefi memory map\n";
#endif

U_BOOT_CMD(
--
2.19.1