This commit implements the test commands for EFI_RAM_DISK_PROTOCOL.
With the disk load/unload commands, user can mount the
ISO image in the volatile memory through EFI_RAM_DISK_PROTOCOL.
Currently the load command can load only one image at a time
even if UEFI specification does not limit the number of images.
Anyway one image is enough for testing.
Signed-off-by: Masahisa Kojima <masahisa.koj...@linaro.org>
---
cmd/efidebug.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 117 insertions(+)
diff --git a/cmd/efidebug.c b/cmd/efidebug.c
index 9622430c47..3466ae7e32 100644
--- a/cmd/efidebug.c
+++ b/cmd/efidebug.c
@@ -1421,6 +1421,113 @@ static int do_efi_query_info(struct cmd_tbl *cmdtp, int
flag,
return CMD_RET_SUCCESS;
}
+#ifdef CONFIG_EFI_RAM_DISK_PROTOCOL
+static struct efi_device_path *ram_disk_dp;
+static efi_guid_t virtual_cd_guid = EFI_VIRTUAL_CD_GUID;
+
+static int do_efi_disk_load(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ u64 addr, size;
+ efi_status_t ret;
+ struct efi_ram_disk_protocol *ram_disk = NULL;
+
+ if (ram_disk_dp) {
+ printf("Only one image can be loaded\n");
+ return CMD_RET_FAILURE;
+ }
+
+ argc--;
+ argv++;
+
+ if (argc != 2)
+ return CMD_RET_USAGE;
+
+ addr = hextoul(argv[0], NULL);
+ size = hextoul(argv[1], NULL);
+
+ ret = EFI_CALL(BS->locate_protocol(&efi_guid_ram_disk_protocol, NULL,
+ (void **)&ram_disk));
+ if (ret != EFI_SUCCESS || !ram_disk) {
+ printf("No EFI_RAM_DISK_PROTOCOL found(ret = %lu)\n",
+ ret & ~EFI_ERROR_MASK);
+ return CMD_RET_FAILURE;
+ }
+
+ ret = EFI_CALL(ram_disk->disk_register(addr, size, &virtual_cd_guid,
NULL,
+ &ram_disk_dp));
+ if (ret != EFI_SUCCESS || !ram_disk_dp) {
+ printf("RAM DISK register failed(ret = %lu)\n",
+ ret & ~EFI_ERROR_MASK);
+ return CMD_RET_FAILURE;
+ }
+
+ return CMD_RET_SUCCESS;
+}
+
+static int do_efi_disk_unload(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ efi_status_t ret;
+ struct efi_ram_disk_protocol *ram_disk = NULL;
+
+ ret = EFI_CALL(BS->locate_protocol(&efi_guid_ram_disk_protocol, NULL,
+ (void **)&ram_disk));
+ if (ret != EFI_SUCCESS || !ram_disk) {
+ printf("No EFI_RAM_DISK_PROTOCOL found(ret = %lu)\n",
+ ret & ~EFI_ERROR_MASK);
+ return CMD_RET_FAILURE;
+ }
+
+ ret = EFI_CALL(ram_disk->unregister(ram_disk_dp));
+ if (ret != EFI_SUCCESS) {
+ printf("RAM DISK unregister failed(ret = %lu)\n",
+ ret & ~EFI_ERROR_MASK);
+ return CMD_RET_FAILURE;
+ }
+
+ ram_disk_dp = NULL;
+
+ return CMD_RET_SUCCESS;
+}
+
+static struct cmd_tbl cmd_efidebug_disk_sub[] = {
+ U_BOOT_CMD_MKENT(load, CONFIG_SYS_MAXARGS, 1, do_efi_disk_load, "", ""),
+ U_BOOT_CMD_MKENT(unload, CONFIG_SYS_MAXARGS, 1, do_efi_disk_unload, "",
""),
+};
+
+/**
+ * do_efi_disk() - manage UEFI ram disk device
+ *
+ * @cmdtp: Command table
+ * @flag: Command flag
+ * @argc: Number of arguments
+ * @argv: Argument array
+ * Return: CMD_RET_SUCCESS on success,
+ * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
+ *
+ * Implement efidebug "disk" sub-command.
+ */
+static int do_efi_disk(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ struct cmd_tbl *cp;
+
+ if (argc < 2)
+ return CMD_RET_USAGE;
+
+ argc--;
+ argv++;
+
+ cp = find_cmd_tbl(argv[0], cmd_efidebug_disk_sub,
+ ARRAY_SIZE(cmd_efidebug_disk_sub));
+ if (!cp)
+ return CMD_RET_USAGE;
+
+ return cp->cmd(cmdtp, flag, argc, argv);
+}
+#endif
+
static struct cmd_tbl cmd_efidebug_sub[] = {
U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""),
#ifdef CONFIG_EFI_HAVE_CAPSULE_SUPPORT
@@ -1441,6 +1548,10 @@ static struct cmd_tbl cmd_efidebug_sub[] = {
"", ""),
U_BOOT_CMD_MKENT(query, CONFIG_SYS_MAXARGS, 1, do_efi_query_info,
"", ""),
+#ifdef CONFIG_EFI_RAM_DISK_PROTOCOL
+ U_BOOT_CMD_MKENT(disk, CONFIG_SYS_MAXARGS, 1, do_efi_disk,
+ "", ""),
+#endif
};
/**
@@ -1526,6 +1637,12 @@ static char efidebug_help_text[] =
" - show UEFI memory map\n"
"efidebug tables\n"
" - show UEFI configuration tables\n"
+#ifdef CONFIG_EFI_RAM_DISK_PROTOCOL
+ "efidebug disk load <address> <size>\n"
+ " - load ISO image\n"
+ "efidebug disk unload\n"
+ " - unload ISO image\n"
+#endif
#ifdef CONFIG_CMD_BOOTEFI_BOOTMGR
"efidebug test bootmgr\n"
" - run simple bootmgr for test\n"
--
2.34.1
