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efi_loader: Separate device path into its own header

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These functions are useful for the EFI app. As a first step towards
making these available outside lib/efi_loader, create a separate header
file and include it where needed. Add proper comments to the functions,
since many are missing at present.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Simon Glass
2025-05-24 11:28:21 -06:00
committed by Heinrich Schuchardt
parent df2ed552f0
commit f4bbd7b9fa
19 changed files with 439 additions and 145 deletions
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57
include/efi_loader.h
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@@ -9,6 +9,7 @@
#define _EFI_LOADER_H 1
#include <blk.h>
#include <efi_device_path.h>
#include <event.h>
#include <log.h>
#include <part_efi.h>
@@ -935,66 +936,10 @@ extern void *efi_bounce_buffer;
#define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
#endif
/* shorten device path */
struct efi_device_path *efi_dp_shorten(struct efi_device_path *dp);
struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
int efi_dp_match(const struct efi_device_path *a,
const struct efi_device_path *b);
efi_handle_t efi_dp_find_obj(struct efi_device_path *dp,
const efi_guid_t *guid,
struct efi_device_path **rem);
/* get size of the first device path instance excluding end node */
efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp);
/* size of multi-instance device path excluding end node */
efi_uintn_t efi_dp_size(const struct efi_device_path *dp);
struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
const struct efi_device_path *node);
/* Create a device path node of given type, sub-type, length */
struct efi_device_path *efi_dp_create_device_node(const u8 type,
const u8 sub_type,
const u16 length);
/* Append device path instance */
struct efi_device_path *efi_dp_append_instance(
const struct efi_device_path *dp,
const struct efi_device_path *dpi);
/* Get next device path instance */
struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
efi_uintn_t *size);
/* Check if a device path contains muliple instances */
bool efi_dp_is_multi_instance(const struct efi_device_path *dp);
struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
/* Create a device node for a block device partition. */
struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
struct efi_device_path *efi_dp_from_file(const struct efi_device_path *dp,
const char *path);
struct efi_device_path *efi_dp_from_eth(struct udevice *dev);
struct efi_device_path *efi_dp_from_http(const char *server, struct udevice *dev);
struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
uint64_t start_address,
size_t size);
/* Determine the last device path node that is not the end node. */
const struct efi_device_path *efi_dp_last_node(
const struct efi_device_path *dp);
efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
struct efi_device_path **device_path,
struct efi_device_path **file_path);
struct efi_device_path *efi_dp_from_uart(void);
efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
const char *path,
struct efi_device_path **device,
struct efi_device_path **file);
ssize_t efi_dp_check_length(const struct efi_device_path *dp,
const size_t maxlen);
#define EFI_DP_TYPE(_dp, _type, _subtype) \
(((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))
/* template END node: */
extern const struct efi_device_path END;
/* Indicate supported runtime services */
efi_status_t efi_init_runtime_supported(void);