diff options
| -rw-r--r-- | cmd/bootefi.c | 23 | ||||
| -rw-r--r-- | include/efi_api.h | 8 | ||||
| -rw-r--r-- | include/efi_loader.h | 3 | ||||
| -rw-r--r-- | lib/efi_loader/efi_device_path.c | 24 | ||||
| -rw-r--r-- | lib/efi_loader/efi_device_path_to_text.c | 9 |
5 files changed, 67 insertions, 0 deletions
diff --git a/cmd/bootefi.c b/cmd/bootefi.c index b7087e3..478bc11 100644 --- a/cmd/bootefi.c +++ b/cmd/bootefi.c @@ -127,6 +127,7 @@ static unsigned long do_bootefi_exec(void *efi, void *fdt, { struct efi_loaded_image loaded_image_info = {}; struct efi_object loaded_image_info_obj = {}; + struct efi_device_path *memdp = NULL; ulong ret; ulong (*entry)(void *image_handle, struct efi_system_table *st) @@ -135,6 +136,20 @@ static unsigned long do_bootefi_exec(void *efi, void *fdt, const efi_guid_t fdt_guid = EFI_FDT_GUID; bootm_headers_t img = { 0 }; + /* + * Special case for efi payload not loaded from disk, such as + * 'bootefi hello' or for example payload loaded directly into + * memory via jtag/etc: + */ + if (!device_path && !image_path) { + printf("WARNING: using memory device/image path, this may confuse some payloads!\n"); + /* actual addresses filled in after efi_load_pe() */ + memdp = efi_dp_from_mem(0, 0, 0); + device_path = image_path = memdp; + } else { + assert(device_path && image_path); + } + /* Initialize and populate EFI object list */ if (!efi_obj_list_initalized) efi_init_obj_list(); @@ -181,6 +196,14 @@ static unsigned long do_bootefi_exec(void *efi, void *fdt, goto exit; } + if (memdp) { + struct efi_device_path_memory *mdp = (void *)memdp; + mdp->memory_type = loaded_image_info.image_code_type; + mdp->start_address = (uintptr_t)loaded_image_info.image_base; + mdp->end_address = mdp->start_address + + loaded_image_info.image_size; + } + /* we don't support much: */ env_set("efi_8be4df61-93ca-11d2-aa0d-00e098032b8c_OsIndicationsSupported", "{ro,boot}(blob)0000000000000000"); diff --git a/include/efi_api.h b/include/efi_api.h index a9a6494..94c15b2 100644 --- a/include/efi_api.h +++ b/include/efi_api.h @@ -297,8 +297,16 @@ struct efi_mac_addr { } __packed; #define DEVICE_PATH_TYPE_HARDWARE_DEVICE 0x01 +# define DEVICE_PATH_SUB_TYPE_MEMORY 0x03 # define DEVICE_PATH_SUB_TYPE_VENDOR 0x04 +struct efi_device_path_memory { + struct efi_device_path dp; + u32 memory_type; + u64 start_address; + u64 end_address; +} __packed; + struct efi_device_path_vendor { struct efi_device_path dp; efi_guid_t guid; diff --git a/include/efi_loader.h b/include/efi_loader.h index e1179b7..1b92edb 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -259,6 +259,9 @@ struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part); struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part, const char *path); struct efi_device_path *efi_dp_from_eth(void); +struct efi_device_path *efi_dp_from_mem(uint32_t mem_type, + uint64_t start_address, + uint64_t end_address); void efi_dp_split_file_path(struct efi_device_path *full_path, struct efi_device_path **device_path, struct efi_device_path **file_path); diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c index 5d5c3b3..f6e368e 100644 --- a/lib/efi_loader/efi_device_path.c +++ b/lib/efi_loader/efi_device_path.c @@ -538,6 +538,30 @@ struct efi_device_path *efi_dp_from_eth(void) } #endif +/* Construct a device-path for memory-mapped image */ +struct efi_device_path *efi_dp_from_mem(uint32_t memory_type, + uint64_t start_address, + uint64_t end_address) +{ + struct efi_device_path_memory *mdp; + void *buf, *start; + + start = buf = dp_alloc(sizeof(*mdp) + sizeof(END)); + + mdp = buf; + mdp->dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE; + mdp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MEMORY; + mdp->dp.length = sizeof(*mdp); + mdp->memory_type = memory_type; + mdp->start_address = start_address; + mdp->end_address = end_address; + buf = &mdp[1]; + + *((struct efi_device_path *)buf) = END; + + return start; +} + /* * Helper to split a full device path (containing both device and file * parts) into it's constituent parts. diff --git a/lib/efi_loader/efi_device_path_to_text.c b/lib/efi_loader/efi_device_path_to_text.c index 1a5ef39..6277133 100644 --- a/lib/efi_loader/efi_device_path_to_text.c +++ b/lib/efi_loader/efi_device_path_to_text.c @@ -24,6 +24,15 @@ static char *dp_unknown(char *s, struct efi_device_path *dp) static char *dp_hardware(char *s, struct efi_device_path *dp) { switch (dp->sub_type) { + case DEVICE_PATH_SUB_TYPE_MEMORY: { + struct efi_device_path_memory *mdp = + (struct efi_device_path_memory *)dp; + s += sprintf(s, "/MemoryMapped(0x%x,0x%llx,0x%llx)", + mdp->memory_type, + mdp->start_address, + mdp->end_address); + break; + } case DEVICE_PATH_SUB_TYPE_VENDOR: { struct efi_device_path_vendor *vdp = (struct efi_device_path_vendor *)dp; |