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      1 /* $NetBSD: efiio.h,v 1.3 2023/05/22 16:27:58 riastradh Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2021 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jared McNeill <jmcneill (at) invisible.ca>.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _SYS_EFIIO_H
     33 #define _SYS_EFIIO_H
     34 
     35 #include <sys/types.h>
     36 #include <sys/ioccom.h>
     37 #include <sys/uuid.h>
     38 
     39 /*
     40  * Variable attributes
     41  */
     42 #define	EFI_VARIABLE_NON_VOLATILE				0x00000001
     43 #define	EFI_VARIABLE_BOOTSERVICE_ACCESS				0x00000002
     44 #define	EFI_VARIABLE_RUNTIME_ACCESS				0x00000004
     45 #define	EFI_VARIABLE_HARDWARE_ERROR_RECORD			0x00000008
     46 #define	EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS			0x00000010
     47 #define	EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS	0x00000020
     48 #define	EFI_VARIABLE_APPEND_WRITE				0x00000040
     49 #define	EFI_VARIABLE_ENHANCED_AUTHENTICATED_ACCESS		0x00000080
     50 
     51 struct efi_get_table_ioc {
     52 	void *		buf;
     53 	struct uuid	uuid;
     54 	size_t		table_len;
     55 	size_t		buf_len;
     56 };
     57 
     58 struct efi_var_ioc {
     59 	uint16_t *	name;		/* vendor's variable name */
     60 	size_t		namesize;	/* size in bytes of the name buffer */
     61 	struct uuid	vendor;		/* unique identifier for vendor */
     62 	uint32_t	attrib;		/* variable attribute bitmask */
     63 	void *		data;		/* buffer containing variable data */
     64 	size_t		datasize;	/* size in bytes of the data buffer */
     65 };
     66 
     67 #define	EFIIOC_GET_TABLE	_IOWR('e', 1, struct efi_get_table_ioc)
     68 #define	EFIIOC_VAR_GET		_IOWR('e', 4, struct efi_var_ioc)
     69 #define	EFIIOC_VAR_NEXT		_IOWR('e', 5, struct efi_var_ioc)
     70 #define	EFIIOC_VAR_SET		_IOWR('e', 7, struct efi_var_ioc)
     71 
     72 #endif /* _SYS_EFIIO_H */
     73