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Diffstat (limited to 'include/efi_variable.h')
| -rw-r--r-- | include/efi_variable.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/include/efi_variable.h b/include/efi_variable.h new file mode 100644 index 0000000000..6789118eba --- /dev/null +++ b/include/efi_variable.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de> + */ + +#ifndef _EFI_VARIABLE_H +#define _EFI_VARIABLE_H + +#include <linux/bitops.h> + +#define EFI_VARIABLE_READ_ONLY BIT(31) + +/** + * efi_get_variable() - retrieve value of a UEFI variable + * + * @variable_name: name of the variable + * @vendor: vendor GUID + * @attributes: attributes of the variable + * @data_size: size of the buffer to which the variable value is copied + * @data: buffer to which the variable value is copied + * @timep: authentication time (seconds since start of epoch) + * Return: status code + */ +efi_status_t efi_get_variable_int(u16 *variable_name, const efi_guid_t *vendor, + u32 *attributes, efi_uintn_t *data_size, + void *data, u64 *timep); + +/** + * efi_set_variable() - set value of a UEFI variable + * + * @variable_name: name of the variable + * @vendor: vendor GUID + * @attributes: attributes of the variable + * @data_size: size of the buffer with the variable value + * @data: buffer with the variable value + * @ro_check: check the read only read only bit in attributes + * Return: status code + */ +efi_status_t efi_set_variable_int(u16 *variable_name, const efi_guid_t *vendor, + u32 attributes, efi_uintn_t data_size, + const void *data, bool ro_check); + +#endif |