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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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65
include/efi_api.h
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@ -666,4 +666,69 @@ struct efi_pxe {
struct efi_pxe_mode *mode;
};
#define EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID \
EFI_GUID(0x964e5b22, 0x6459, 0x11d2, \
0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
#define EFI_FILE_PROTOCOL_REVISION 0x00010000
struct efi_file_handle {
u64 rev;
efi_status_t (EFIAPI *open)(struct efi_file_handle *file,
struct efi_file_handle **new_handle,
s16 *file_name, u64 open_mode, u64 attributes);
efi_status_t (EFIAPI *close)(struct efi_file_handle *file);
efi_status_t (EFIAPI *delete)(struct efi_file_handle *file);
efi_status_t (EFIAPI *read)(struct efi_file_handle *file,
u64 *buffer_size, void *buffer);
efi_status_t (EFIAPI *write)(struct efi_file_handle *file,
u64 *buffer_size, void *buffer);
efi_status_t (EFIAPI *getpos)(struct efi_file_handle *file,
u64 *pos);
efi_status_t (EFIAPI *setpos)(struct efi_file_handle *file,
u64 pos);
efi_status_t (EFIAPI *getinfo)(struct efi_file_handle *file,
efi_guid_t *info_type, u64 *buffer_size, void *buffer);
efi_status_t (EFIAPI *setinfo)(struct efi_file_handle *file,
efi_guid_t *info_type, u64 buffer_size, void *buffer);
efi_status_t (EFIAPI *flush)(struct efi_file_handle *file);
};
#define EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID \
EFI_GUID(0x964e5b22, 0x6459, 0x11d2, \
0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
#define EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION 0x00010000
struct efi_simple_file_system_protocol {
u64 rev;
efi_status_t (EFIAPI *open_volume)(struct efi_simple_file_system_protocol *this,
struct efi_file_handle **root);
};
#define EFI_FILE_INFO_GUID \
EFI_GUID(0x9576e92, 0x6d3f, 0x11d2, \
0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
#define EFI_FILE_MODE_READ 0x0000000000000001
#define EFI_FILE_MODE_WRITE 0x0000000000000002
#define EFI_FILE_MODE_CREATE 0x8000000000000000
#define EFI_FILE_READ_ONLY 0x0000000000000001
#define EFI_FILE_HIDDEN 0x0000000000000002
#define EFI_FILE_SYSTEM 0x0000000000000004
#define EFI_FILE_RESERVED 0x0000000000000008
#define EFI_FILE_DIRECTORY 0x0000000000000010
#define EFI_FILE_ARCHIVE 0x0000000000000020
#define EFI_FILE_VALID_ATTR 0x0000000000000037
struct efi_file_info {
u64 size;
u64 file_size;
u64 physical_size;
struct efi_time create_time;
struct efi_time last_access_time;
struct efi_time modification_time;
u64 attribute;
s16 file_name[0];
};
#endif