From: Leif Lindholm leif.lindholm@linaro.org
Not complete, but enough for Shell.efi and SCT.efi. We'll implement the rest as needed or once we have SCT running properly so there is a way to validate the interface against the conformance test suite.
Initial skeleton written by Leif, and then implementation by myself.
Cc: Leif Lindholm leif.lindholm@linaro.org Signed-off-by: Rob Clark robdclark@gmail.com --- include/efi_api.h | 34 +++++++++++- include/efi_loader.h | 2 + lib/efi_loader/Makefile | 1 + lib/efi_loader/efi_boottime.c | 4 ++ lib/efi_loader/efi_device_path_utilities.c | 88 ++++++++++++++++++++++++++++++ 5 files changed, 127 insertions(+), 2 deletions(-) create mode 100644 lib/efi_loader/efi_device_path_utilities.c
diff --git a/include/efi_api.h b/include/efi_api.h index a9a6494afe..ffdba7fe1a 100644 --- a/include/efi_api.h +++ b/include/efi_api.h @@ -28,8 +28,9 @@ enum efi_timer_delay { EFI_TIMER_RELATIVE = 2 };
-#define UINTN size_t -typedef long INTN; +#define UINTN size_t /* TODO this should be removed in a future patch */ +typedef size_t efi_uintn_t; +typedef ssize_t efi_intn_t; typedef uint16_t *efi_string_t;
#define EVT_TIMER 0x80000000 @@ -506,6 +507,35 @@ struct efi_device_path_to_text_protocol bool allow_shortcuts); };
+#define EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID \ + EFI_GUID(0x0379be4e, 0xd706, 0x437d, \ + 0xb0, 0x37, 0xed, 0xb8, 0x2f, 0xb7, 0x72, 0xa4) + +struct efi_device_path_utilities_protocol { + efi_uintn_t (EFIAPI *get_device_path_size)( + const struct efi_device_path *device_path); + struct efi_device_path *(EFIAPI *duplicate_device_path)( + const struct efi_device_path *device_path); + struct efi_device_path *(EFIAPI *append_device_path)( + const struct efi_device_path *src1, + const struct efi_device_path *src2); + struct efi_device_path *(EFIAPI *append_device_node)( + const struct efi_device_path *device_path, + const struct efi_device_path *device_node); + struct efi_device_path *(EFIAPI *append_device_path_instance)( + const struct efi_device_path *device_path, + const struct efi_device_path *device_path_instance); + struct efi_device_path *(EFIAPI *get_next_device_path_instance)( + struct efi_device_path **device_path_instance, + efi_uintn_t *device_path_instance_size); + bool (EFIAPI *is_device_path_multi_instance)( + const struct efi_device_path *device_path); + struct efi_device_path *(EFIAPI *create_device_node)( + uint8_t node_type, + uint8_t node_sub_type, + uint16_t node_length); +}; + #define EFI_GOP_GUID \ EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, \ 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a) diff --git a/include/efi_loader.h b/include/efi_loader.h index e1179b7dcd..5d37c1d75f 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -79,6 +79,7 @@ extern const struct efi_simple_text_output_protocol efi_con_out; extern struct efi_simple_input_interface efi_con_in; extern const struct efi_console_control_protocol efi_console_control; extern const struct efi_device_path_to_text_protocol efi_device_path_to_text; +extern const struct efi_device_path_utilities_protocol efi_device_path_utilities;
uint16_t *efi_dp_str(struct efi_device_path *dp);
@@ -89,6 +90,7 @@ extern const efi_guid_t efi_guid_loaded_image; extern const efi_guid_t efi_guid_device_path_to_text_protocol; extern const efi_guid_t efi_simple_file_system_protocol_guid; extern const efi_guid_t efi_file_info_guid; +extern const efi_guid_t efi_guid_device_path_utilities_protocol;
extern unsigned int __efi_runtime_start, __efi_runtime_stop; extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop; diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile index ddb978f650..b6927b3b84 100644 --- a/lib/efi_loader/Makefile +++ b/lib/efi_loader/Makefile @@ -17,6 +17,7 @@ endif obj-$(CONFIG_CMD_BOOTEFI_HELLO) += helloworld_efi.o obj-y += efi_image_loader.o efi_boottime.o efi_runtime.o efi_console.o obj-y += efi_memory.o efi_device_path_to_text.o efi_device_path.o +obj-y += efi_device_path_utilities.o obj-y += efi_file.o efi_variable.o efi_bootmgr.o obj-$(CONFIG_LCD) += efi_gop.o obj-$(CONFIG_DM_VIDEO) += efi_gop.o diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index 976d5822f7..92c778fcca 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -1153,6 +1153,10 @@ void efi_setup_loaded_image(struct efi_loaded_image *info, struct efi_object *ob obj->protocols[3].protocol_interface = (void *)&efi_device_path_to_text;
+ obj->protocols[4].guid = &efi_guid_device_path_utilities_protocol; + obj->protocols[4].protocol_interface = + (void *)&efi_device_path_utilities; + info->file_path = file_path; info->device_handle = efi_dp_find_obj(device_path, NULL);
diff --git a/lib/efi_loader/efi_device_path_utilities.c b/lib/efi_loader/efi_device_path_utilities.c new file mode 100644 index 0000000000..9d90f14ee4 --- /dev/null +++ b/lib/efi_loader/efi_device_path_utilities.c @@ -0,0 +1,88 @@ +/* + * EFI device path interface + * + * Copyright (c) 2017 Leif Lindholm + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <efi_loader.h> + +const efi_guid_t efi_guid_device_path_utilities_protocol = + EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID; + +static efi_uintn_t EFIAPI get_device_path_size( + const struct efi_device_path *device_path) +{ + efi_uintn_t sz = 0; + EFI_ENTRY("%p", device_path); + /* size includes the END node: */ + if (device_path) + sz = efi_dp_size(device_path) + sizeof(struct efi_device_path); + return EFI_EXIT(sz); +} + +static struct efi_device_path * EFIAPI duplicate_device_path( + const struct efi_device_path *device_path) +{ + EFI_ENTRY("%p", device_path); + return EFI_EXIT(efi_dp_dup(device_path)); +} + +static struct efi_device_path * EFIAPI append_device_path( + const struct efi_device_path *src1, + const struct efi_device_path *src2) +{ + EFI_ENTRY("%p, %p", src1, src2); + return EFI_EXIT(efi_dp_append(src1, src2)); +} + +static struct efi_device_path * EFIAPI append_device_node( + const struct efi_device_path *device_path, + const struct efi_device_path *device_node) +{ + EFI_ENTRY("%p, %p", device_path, device_node); + return EFI_EXIT(efi_dp_append_node(device_path, device_node)); +} + +static struct efi_device_path * EFIAPI append_device_path_instance( + const struct efi_device_path *device_path, + const struct efi_device_path *device_path_instance) +{ + EFI_ENTRY("%p, %p", device_path, device_path_instance); + return EFI_EXIT(NULL); +} + +static struct efi_device_path * EFIAPI get_next_device_path_instance( + struct efi_device_path **device_path_instance, + efi_uintn_t *device_path_instance_size) +{ + EFI_ENTRY("%p, %p", device_path_instance, device_path_instance_size); + return EFI_EXIT(NULL); +} + +static bool EFIAPI is_device_path_multi_instance( + const struct efi_device_path *device_path) +{ + EFI_ENTRY("%p", device_path); + return EFI_EXIT(false); +} + +static struct efi_device_path * EFIAPI create_device_node( + uint8_t node_type, uint8_t node_sub_type, uint16_t node_length) +{ + EFI_ENTRY("%u, %u, %u", node_type, node_sub_type, node_length); + return EFI_EXIT(NULL); +} + +const struct efi_device_path_utilities_protocol efi_device_path_utilities = { + .get_device_path_size = get_device_path_size, + .duplicate_device_path = duplicate_device_path, + .append_device_path = append_device_path, + .append_device_node = append_device_node, + .append_device_path_instance = append_device_path_instance, + .get_next_device_path_instance = get_next_device_path_instance, + .is_device_path_multi_instance = is_device_path_multi_instance, + .create_device_node = create_device_node, +};