diff options
Diffstat (limited to 'cmd/bootefi.c')
| -rw-r--r-- | cmd/bootefi.c | 142 |
1 files changed, 87 insertions, 55 deletions
diff --git a/cmd/bootefi.c b/cmd/bootefi.c index c82a5ba..8fa4a1c 100644 --- a/cmd/bootefi.c +++ b/cmd/bootefi.c @@ -29,6 +29,82 @@ DECLARE_GLOBAL_DATA_PTR; static struct efi_device_path *bootefi_image_path; static struct efi_device_path *bootefi_device_path; +static void *image_addr; +static size_t image_size; + +/** + * efi_clear_bootdev() - clear boot device + */ +static void efi_clear_bootdev(void) +{ + efi_free_pool(bootefi_device_path); + efi_free_pool(bootefi_image_path); + bootefi_device_path = NULL; + bootefi_image_path = NULL; + image_addr = NULL; + image_size = 0; +} + +/** + * efi_set_bootdev() - set boot device + * + * This function is called when a file is loaded, e.g. via the 'load' command. + * We use the path to this file to inform the UEFI binary about the boot device. + * + * @dev: device, e.g. "MMC" + * @devnr: number of the device, e.g. "1:2" + * @path: path to file loaded + * @buffer: buffer with file loaded + * @buffer_size: size of file loaded + */ +void efi_set_bootdev(const char *dev, const char *devnr, const char *path, + void *buffer, size_t buffer_size) +{ + struct efi_device_path *device, *image; + efi_status_t ret; + + /* Forget overwritten image */ + if (buffer + buffer_size >= image_addr && + image_addr + image_size >= buffer) + efi_clear_bootdev(); + + /* Remember only PE-COFF and FIT images */ + if (efi_check_pe(buffer, buffer_size, NULL) != EFI_SUCCESS) { +#ifdef CONFIG_FIT + if (!fit_check_format(buffer)) + return; + /* + * FIT images of type EFI_OS are started via command bootm. + * We should not use their boot device with the bootefi command. + */ + buffer = 0; + buffer_size = 0; +#else + return; +#endif + } + + /* efi_set_bootdev() is typically called repeatedly, recover memory */ + efi_clear_bootdev(); + + image_addr = buffer; + image_size = buffer_size; + + ret = efi_dp_from_name(dev, devnr, path, &device, &image); + if (ret == EFI_SUCCESS) { + bootefi_device_path = device; + if (image) { + /* FIXME: image should not contain device */ + struct efi_device_path *image_tmp = image; + + efi_dp_split_file_path(image, &device, &image); + efi_free_pool(image_tmp); + } + bootefi_image_path = image; + } else { + efi_clear_bootdev(); + } +} /** * efi_env_set_load_options() - set load options from environment variable @@ -398,33 +474,28 @@ static int do_bootefi_image(const char *image_opt) { void *image_buf; unsigned long addr, size; - const char *size_str; efi_status_t ret; #ifdef CONFIG_CMD_BOOTEFI_HELLO if (!strcmp(image_opt, "hello")) { image_buf = __efi_helloworld_begin; size = __efi_helloworld_end - __efi_helloworld_begin; - - efi_free_pool(bootefi_device_path); - efi_free_pool(bootefi_image_path); - bootefi_device_path = NULL; - bootefi_image_path = NULL; + efi_clear_bootdev(); } else #endif { - size_str = env_get("filesize"); - if (size_str) - size = simple_strtoul(size_str, NULL, 16); - else - size = 0; - - addr = simple_strtoul(image_opt, NULL, 16); + addr = strtoul(image_opt, NULL, 16); /* Check that a numeric value was passed */ - if (!addr && *image_opt != '0') + if (!addr) return CMD_RET_USAGE; - image_buf = map_sysmem(addr, size); + image_buf = map_sysmem(addr, 0); + + if (image_buf != image_addr) { + log_err("No UEFI binary known at %s\n", image_opt); + return CMD_RET_FAILURE; + } + size = image_size; } ret = efi_run_image(image_buf, size); @@ -557,11 +628,8 @@ static efi_status_t bootefi_test_prepare if (ret == EFI_SUCCESS) return ret; - efi_free_pool(bootefi_image_path); - bootefi_image_path = NULL; failure: - efi_free_pool(bootefi_device_path); - bootefi_device_path = NULL; + efi_clear_bootdev(); return ret; } @@ -681,39 +749,3 @@ U_BOOT_CMD( "Boots an EFI payload from memory", bootefi_help_text ); - -/** - * efi_set_bootdev() - set boot device - * - * This function is called when a file is loaded, e.g. via the 'load' command. - * We use the path to this file to inform the UEFI binary about the boot device. - * - * @dev: device, e.g. "MMC" - * @devnr: number of the device, e.g. "1:2" - * @path: path to file loaded - */ -void efi_set_bootdev(const char *dev, const char *devnr, const char *path) -{ - struct efi_device_path *device, *image; - efi_status_t ret; - - /* efi_set_bootdev is typically called repeatedly, recover memory */ - efi_free_pool(bootefi_device_path); - efi_free_pool(bootefi_image_path); - - ret = efi_dp_from_name(dev, devnr, path, &device, &image); - if (ret == EFI_SUCCESS) { - bootefi_device_path = device; - if (image) { - /* FIXME: image should not contain device */ - struct efi_device_path *image_tmp = image; - - efi_dp_split_file_path(image, &device, &image); - efi_free_pool(image_tmp); - } - bootefi_image_path = image; - } else { - bootefi_device_path = NULL; - bootefi_image_path = NULL; - } -} |