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.kojima@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"