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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Copyright (C) 2018 Huaxintong Semiconductor Technology Co.,Ltd. All rights
* reserved.
* Author: Ge Song <ge.song@hxt-semitech.com>
*/
#ifndef EFIVAR_H
#define EFIVAR_H
#include <stdbool.h>
#include <stdint.h>
#include <linux/magic.h>
#define EFI_VARIABLE_NON_VOLATILE 0x00000001
#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x00000002
#define EFI_VARIABLE_RUNTIME_ACCESS 0x00000004
#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x00000008
#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x00000010
#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x00000020
#define EFI_VARIABLE_APPEND_WRITE 0x00000040
#define EFI_DEFALT_ATTRIBUTES ( \
EFI_VARIABLE_NON_VOLATILE | \
EFI_VARIABLE_RUNTIME_ACCESS | \
EFI_VARIABLE_BOOTSERVICE_ACCESS \
)
#ifndef EFIVARFS_MAGIC
#define EFIVARFS_MAGIC 0xde5e81e4
#endif
struct efi_data {
uint32_t attributes;
size_t data_size;
void *data;
uint8_t fill[0];
};
struct efi_mount {
const char *path;
const char *guid;
};
void efi_init_mount(struct efi_mount *efi_mount, const char *path,
const char *guid);
bool efi_check_mount_magic(const struct efi_mount *efi_mount, bool check_magic);
static inline bool efi_check_mount(const struct efi_mount *efi_mount)
{
return efi_check_mount_magic(efi_mount, true);
}
int efi_get_variable(void *ctx, const struct efi_mount *efi_mount,
const char *name, struct efi_data **efi_data);
int efi_set_variable(const struct efi_mount *efi_mount, const char *name,
const struct efi_data *efi_data);
int efi_del_variable(const struct efi_mount *efi_mount, const char *name);
#endif /* EFIVAR_H */
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