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efi_loader: add file/filesys support

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fallback.efi (and probably other things) use UEFI's simple-file-system
protocol and file support to search for OS's to boot.

Signed-off-by: Rob Clark <robdclark@gmail.com>
[agraf: whitespace fixes, unsigned fixes]
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Rob Clark 2017-09-13 18:05:34 -04:00 • committed by Alexander Graf
parent 95c5553ea2
commit 2a92080d8c
7 changed files with 676 additions and 0 deletions
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13
include/efi_loader.h
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@ -86,6 +86,8 @@ extern const efi_guid_t efi_guid_console_control;
extern const efi_guid_t efi_guid_device_path;
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 unsigned int __efi_runtime_start, __efi_runtime_stop;
extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
@ -163,6 +165,9 @@ int efi_net_register(void);
/* Called by bootefi to make SMBIOS tables available */
void efi_smbios_register(void);
struct efi_simple_file_system_protocol *
efi_fs_from_path(struct efi_device_path *fp);
/* Called by networking code to memorize the dhcp ack package */
void efi_net_set_dhcp_ack(void *pkt, int len);
@ -191,6 +196,14 @@ efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
/* Call this to signal an event */
void efi_signal_event(struct efi_event *event);
/* open file system: */
struct efi_simple_file_system_protocol *efi_simple_file_system(
struct blk_desc *desc, int part, struct efi_device_path *dp);
/* open file from device-path: */
struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);
/* Generic EFI memory allocator, call this to get memory */
void *efi_alloc(uint64_t len, int memory_type);
/* More specific EFI memory allocator, called by EFI payloads */