X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=cmd%2Fbootefi.c;h=56bdff33c64732fc6f6671b08478121133d9e742;hb=986e0648840710b55a93587fc166296365e03f24;hp=efaa548be4d84dd41bf7f4ee3ef78baf03e66ca3;hpb=b4ee6daad7a2604ca9466b2ba48de86cc27d381f;p=oweals%2Fu-boot.git diff --git a/cmd/bootefi.c b/cmd/bootefi.c index efaa548be4..56bdff33c6 100644 --- a/cmd/bootefi.c +++ b/cmd/bootefi.c @@ -6,20 +6,18 @@ */ #include -#include #include #include #include #include #include +#include #include #include #include #include #include -#include #include -#include #include DECLARE_GLOBAL_DATA_PTR; @@ -27,23 +25,16 @@ DECLARE_GLOBAL_DATA_PTR; static struct efi_device_path *bootefi_image_path; static struct efi_device_path *bootefi_device_path; -/* - * Allow unaligned memory access. - * - * This routine is overridden by architectures providing this feature. - */ -void __weak allow_unaligned(void) -{ -} - -/* +/** * Set the load options of an image from an environment variable. * - * @handle: the image handle - * @env_var: name of the environment variable - * Return: status code + * @handle: the image handle + * @env_var: name of the environment variable + * @load_options: pointer to load options (output) + * Return: status code */ -static efi_status_t set_load_options(efi_handle_t handle, const char *env_var) +static efi_status_t set_load_options(efi_handle_t handle, const char *env_var, + u16 **load_options) { struct efi_loaded_image *loaded_image_info; size_t size; @@ -51,6 +42,7 @@ static efi_status_t set_load_options(efi_handle_t handle, const char *env_var) u16 *pos; efi_status_t ret; + *load_options = NULL; ret = EFI_CALL(systab.boottime->open_protocol( handle, &efi_guid_loaded_image, @@ -75,6 +67,7 @@ static efi_status_t set_load_options(efi_handle_t handle, const char *env_var) return EFI_OUT_OF_RESOURCES; } pos = loaded_image_info->load_options; + *load_options = pos; utf8_utf16_strcpy(&pos, env); loaded_image_info->load_options_size = size * 2; @@ -155,7 +148,7 @@ done: return ret; } -/* +/** * efi_carve_out_dt_rsv() - Carve out DT reserved memory ranges * * The mem_rsv entries of the FDT are added to the memory map. Any failures are @@ -181,8 +174,8 @@ static void efi_carve_out_dt_rsv(void *fdt) pages = efi_size_in_pages(size + (addr & EFI_PAGE_MASK)); addr &= ~EFI_PAGE_MASK; - if (!efi_add_memory_map(addr, pages, EFI_RESERVED_MEMORY_TYPE, - false)) + if (efi_add_memory_map(addr, pages, EFI_RESERVED_MEMORY_TYPE, + false) != EFI_SUCCESS) printf("FDT memrsv map %d: Failed to add to map\n", i); } } @@ -207,53 +200,63 @@ static void *get_config_table(const efi_guid_t *guid) #endif /* !CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE) */ /** - * efi_install_fdt() - install fdt passed by a command argument - * @fdt_opt: pointer to argument - * Return: status code + * efi_install_fdt() - install device tree * - * If specified, fdt will be installed as configuration table, - * otherwise no fdt will be passed. + * If fdt_addr is available, the device tree located at that memory address will + * will be installed as configuration table, otherwise the device tree located + * at the address indicated by environment variable fdt_addr or as fallback + * fdtcontroladdr will be used. + * + * On architectures using ACPI tables device trees shall not be installed as + * configuration table. + * + * @fdt_addr: address of device tree or EFI_FDT_USE_INTERNAL to use the + * the hardware device tree as indicated by environment variable + * fdt_addr or as fallback the internal device tree as indicated by + * the environment variable fdtcontroladdr + * Return: status code */ -static efi_status_t efi_install_fdt(const char *fdt_opt) +efi_status_t efi_install_fdt(void *fdt) { /* * The EBBR spec requires that we have either an FDT or an ACPI table * but not both. */ #if CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE) - if (fdt_opt) { + if (fdt) { printf("ERROR: can't have ACPI table and device tree.\n"); return EFI_LOAD_ERROR; } #else - unsigned long fdt_addr; - void *fdt; bootm_headers_t img = { 0 }; efi_status_t ret; - if (fdt_opt) { - fdt_addr = simple_strtoul(fdt_opt, NULL, 16); - if (!fdt_addr) - return EFI_INVALID_PARAMETER; - } else { + if (fdt == EFI_FDT_USE_INTERNAL) { + const char *fdt_opt; + uintptr_t fdt_addr; + /* Look for device tree that is already installed */ if (get_config_table(&efi_guid_fdt)) return EFI_SUCCESS; - /* Use our own device tree as default */ - fdt_opt = env_get("fdtcontroladdr"); + /* Check if there is a hardware device tree */ + fdt_opt = env_get("fdt_addr"); + /* Use our own device tree as fallback */ if (!fdt_opt) { - printf("ERROR: need device tree\n"); - return EFI_NOT_FOUND; + fdt_opt = env_get("fdtcontroladdr"); + if (!fdt_opt) { + printf("ERROR: need device tree\n"); + return EFI_NOT_FOUND; + } } fdt_addr = simple_strtoul(fdt_opt, NULL, 16); if (!fdt_addr) { - printf("ERROR: invalid $fdtcontroladdr\n"); + printf("ERROR: invalid $fdt_addr or $fdtcontroladdr\n"); return EFI_LOAD_ERROR; } + fdt = map_sysmem(fdt_addr, 0); } /* Install device tree */ - fdt = map_sysmem(fdt_addr, 0); if (fdt_check_header(fdt)) { printf("ERROR: invalid device tree\n"); return EFI_LOAD_ERROR; @@ -297,63 +300,40 @@ static efi_status_t efi_install_fdt(const char *fdt_opt) static efi_status_t do_bootefi_exec(efi_handle_t handle) { efi_status_t ret; + efi_uintn_t exit_data_size = 0; + u16 *exit_data = NULL; + u16 *load_options; /* Transfer environment variable as load options */ - ret = set_load_options(handle, "bootargs"); + ret = set_load_options(handle, "bootargs", &load_options); if (ret != EFI_SUCCESS) return ret; - /* we don't support much: */ - env_set("efi_8be4df61-93ca-11d2-aa0d-00e098032b8c_OsIndicationsSupported", - "{ro,boot}(blob)0000000000000000"); - /* Call our payload! */ - ret = EFI_CALL(efi_start_image(handle, NULL, NULL)); + ret = EFI_CALL(efi_start_image(handle, &exit_data_size, &exit_data)); + printf("## Application terminated, r = %lu\n", ret & ~EFI_ERROR_MASK); + if (ret && exit_data) { + printf("## %ls\n", exit_data); + efi_free_pool(exit_data); + } efi_restore_gd(); - /* - * FIXME: Who is responsible for - * free(loaded_image_info->load_options); - * Once efi_exit() is implemented correctly, - * handle itself doesn't exist here. - */ + free(load_options); return ret; } /** - * do_efibootmgr() - execute EFI Boot Manager + * do_efibootmgr() - execute EFI boot manager * - * @fdt_opt: string of fdt start address * Return: status code - * - * Execute EFI Boot Manager */ -static int do_efibootmgr(const char *fdt_opt) +static int do_efibootmgr(void) { efi_handle_t handle; efi_status_t ret; - /* Allow unaligned memory access */ - allow_unaligned(); - - switch_to_non_secure_mode(); - - /* Initialize EFI drivers */ - ret = efi_init_obj_list(); - if (ret != EFI_SUCCESS) { - printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", - ret & ~EFI_ERROR_MASK); - return CMD_RET_FAILURE; - } - - ret = efi_install_fdt(fdt_opt); - if (ret == EFI_INVALID_PARAMETER) - return CMD_RET_USAGE; - else if (ret != EFI_SUCCESS) - return CMD_RET_FAILURE; - ret = efi_bootmgr_load(&handle); if (ret != EFI_SUCCESS) { printf("EFI boot manager: Cannot load any image\n"); @@ -361,7 +341,6 @@ static int do_efibootmgr(const char *fdt_opt) } ret = do_bootefi_exec(handle); - printf("## Application terminated, r = %lu\n", ret & ~EFI_ERROR_MASK); if (ret != EFI_SUCCESS) return CMD_RET_FAILURE; @@ -369,45 +348,22 @@ static int do_efibootmgr(const char *fdt_opt) return CMD_RET_SUCCESS; } -/* - * do_bootefi_image() - execute EFI binary from command line +/** + * do_bootefi_image() - execute EFI binary + * + * Set up memory image for the binary to be loaded, prepare device path, and + * then call do_bootefi_exec() to execute it. * * @image_opt: string of image start address - * @fdt_opt: string of fdt start address * Return: status code - * - * Set up memory image for the binary to be loaded, prepare - * device path and then call do_bootefi_exec() to execute it. */ -static int do_bootefi_image(const char *image_opt, const char *fdt_opt) +static int do_bootefi_image(const char *image_opt) { void *image_buf; - struct efi_device_path *device_path, *image_path; - struct efi_device_path *file_path = NULL; unsigned long addr, size; const char *size_str; - efi_handle_t mem_handle = NULL, handle; efi_status_t ret; - /* Allow unaligned memory access */ - allow_unaligned(); - - switch_to_non_secure_mode(); - - /* Initialize EFI drivers */ - ret = efi_init_obj_list(); - if (ret != EFI_SUCCESS) { - printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", - ret & ~EFI_ERROR_MASK); - return CMD_RET_FAILURE; - } - - ret = efi_install_fdt(fdt_opt); - if (ret == EFI_INVALID_PARAMETER) - return CMD_RET_USAGE; - else if (ret != EFI_SUCCESS) - return CMD_RET_FAILURE; - #ifdef CONFIG_CMD_BOOTEFI_HELLO if (!strcmp(image_opt, "hello")) { char *saddr; @@ -423,8 +379,10 @@ static int do_bootefi_image(const char *image_opt, const char *fdt_opt) image_buf = map_sysmem(addr, size); memcpy(image_buf, __efi_helloworld_begin, size); - device_path = NULL; - image_path = NULL; + efi_free_pool(bootefi_device_path); + efi_free_pool(bootefi_image_path); + bootefi_device_path = NULL; + bootefi_image_path = NULL; } else #endif { @@ -440,19 +398,37 @@ static int do_bootefi_image(const char *image_opt, const char *fdt_opt) return CMD_RET_USAGE; image_buf = map_sysmem(addr, size); - - device_path = bootefi_device_path; - image_path = bootefi_image_path; } + ret = efi_run_image(image_buf, size); - if (!device_path && !image_path) { + if (ret != EFI_SUCCESS) + return CMD_RET_FAILURE; + + return CMD_RET_SUCCESS; +} + +/** + * efi_run_image() - run loaded UEFI image + * + * @source_buffer: memory address of the UEFI image + * @source_size: size of the UEFI image + * Return: status code + */ +efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size) +{ + efi_handle_t mem_handle = NULL, handle; + struct efi_device_path *file_path = NULL; + efi_status_t ret; + + if (!bootefi_device_path || !bootefi_image_path) { /* * Special case for efi payload not loaded from disk, * such as 'bootefi hello' or for example payload * loaded directly into memory via JTAG, etc: */ file_path = efi_dp_from_mem(EFI_RESERVED_MEMORY_TYPE, - (uintptr_t)image_buf, size); + (uintptr_t)source_buffer, + source_size); /* * Make sure that device for device_path exist * in load_image(). Otherwise, shell and grub will fail. @@ -466,28 +442,23 @@ static int do_bootefi_image(const char *image_opt, const char *fdt_opt) if (ret != EFI_SUCCESS) goto out; } else { - assert(device_path && image_path); - file_path = efi_dp_append(device_path, image_path); + file_path = efi_dp_append(bootefi_device_path, + bootefi_image_path); } - ret = EFI_CALL(efi_load_image(false, efi_root, - file_path, image_buf, size, &handle)); + ret = EFI_CALL(efi_load_image(false, efi_root, file_path, source_buffer, + source_size, &handle)); if (ret != EFI_SUCCESS) goto out; ret = do_bootefi_exec(handle); - printf("## Application terminated, r = %lu\n", ret & ~EFI_ERROR_MASK); out: if (mem_handle) efi_delete_handle(mem_handle); if (file_path) efi_free_pool(file_path); - - if (ret != EFI_SUCCESS) - return CMD_RET_FAILURE; - - return CMD_RET_SUCCESS; + return ret; } #ifdef CONFIG_CMD_BOOTEFI_SELFTEST @@ -498,6 +469,7 @@ static efi_status_t bootefi_run_prepare(const char *load_options_path, struct efi_loaded_image **loaded_image_infop) { efi_status_t ret; + u16 *load_options; ret = efi_setup_loaded_image(device_path, image_path, image_objp, loaded_image_infop); @@ -505,7 +477,8 @@ static efi_status_t bootefi_run_prepare(const char *load_options_path, return ret; /* Transfer environment variable as load options */ - return set_load_options((efi_handle_t)*image_objp, load_options_path); + return set_load_options((efi_handle_t)*image_objp, load_options_path, + &load_options); } /** @@ -568,38 +541,16 @@ static void bootefi_run_finish(struct efi_loaded_image_obj *image_obj, } /** - * do_efi_selftest() - execute EFI Selftest + * do_efi_selftest() - execute EFI selftest * - * @fdt_opt: string of fdt start address * Return: status code - * - * Execute EFI Selftest */ -static int do_efi_selftest(const char *fdt_opt) +static int do_efi_selftest(void) { struct efi_loaded_image_obj *image_obj; struct efi_loaded_image *loaded_image_info; efi_status_t ret; - /* Allow unaligned memory access */ - allow_unaligned(); - - switch_to_non_secure_mode(); - - /* Initialize EFI drivers */ - ret = efi_init_obj_list(); - if (ret != EFI_SUCCESS) { - printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", - ret & ~EFI_ERROR_MASK); - return CMD_RET_FAILURE; - } - - ret = efi_install_fdt(fdt_opt); - if (ret == EFI_INVALID_PARAMETER) - return CMD_RET_USAGE; - else if (ret != EFI_SUCCESS) - return CMD_RET_FAILURE; - ret = bootefi_test_prepare(&image_obj, &loaded_image_info, "\\selftest", "efi_selftest"); if (ret != EFI_SUCCESS) @@ -613,20 +564,53 @@ static int do_efi_selftest(const char *fdt_opt) } #endif /* CONFIG_CMD_BOOTEFI_SELFTEST */ -/* Interpreter command to boot an arbitrary EFI image from memory */ +/** + * do_bootefi() - execute `bootefi` command + * + * @cmdtp: table entry describing command + * @flag: bitmap indicating how the command was invoked + * @argc: number of arguments + * @argv: command line arguments + * Return: status code + */ static int do_bootefi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { + efi_status_t ret; + void *fdt; + if (argc < 2) return CMD_RET_USAGE; + /* Initialize EFI drivers */ + ret = efi_init_obj_list(); + if (ret != EFI_SUCCESS) { + printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", + ret & ~EFI_ERROR_MASK); + return CMD_RET_FAILURE; + } + + if (argc > 2) { + uintptr_t fdt_addr; + + fdt_addr = simple_strtoul(argv[2], NULL, 16); + fdt = map_sysmem(fdt_addr, 0); + } else { + fdt = EFI_FDT_USE_INTERNAL; + } + ret = efi_install_fdt(fdt); + if (ret == EFI_INVALID_PARAMETER) + return CMD_RET_USAGE; + else if (ret != EFI_SUCCESS) + return CMD_RET_FAILURE; + if (!strcmp(argv[1], "bootmgr")) - return do_efibootmgr(argc > 2 ? argv[2] : NULL); + return do_efibootmgr(); #ifdef CONFIG_CMD_BOOTEFI_SELFTEST else if (!strcmp(argv[1], "selftest")) - return do_efi_selftest(argc > 2 ? argv[2] : NULL); + return do_efi_selftest(); #endif - return do_bootefi_image(argv[1], argc > 2 ? argv[2] : NULL); + return do_bootefi_image(argv[1]); } #ifdef CONFIG_SYS_LONGHELP @@ -658,6 +642,16 @@ U_BOOT_CMD( 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;