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Introduce libefi -- a library around EFI runtime services and protocols.

Browse Source 
This first commit brings 3 functions for enumerating, retrieving,
adding, removing and modifying EFI variables. The immediate use of these
include the insertion of a new boot option as part of the installation
process.

This library uses ioctl(2) requests implemented by io(4) to pass the
requests down through the kernel to EFI. These ioctl requests are only
implemented on ia64, so libefi is currently only enabled on ia64. The
interface is generic and io(4) on mad64/i386 can easily be taught to
handle these once EFI support has been added to the kernel there.
This commit is contained in:
Marcel Moolenaar 2010-01-30 04:24:03 +00:00
parent 9dd3fbb0f2
commit eb0a7e4130
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=203181
9 changed files with 634 additions and 2 deletions
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5
lib/Makefile
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@ -33,8 +33,8 @@ SUBDIR= ${_csu} libc libbsm libauditd libcom_err libcrypt libelf libkvm msun \
libtacplus libutil ${_libypclnt} libalias libarchive \
${_libatm} libbegemot ${_libbluetooth} ${_libbsnmp} libbz2 \
libcalendar libcam libcompat libdevinfo libdevstat libdisk \
libdwarf libedit libexpat libfetch libftpio libgeom ${_libgpib} \
${_libgssapi} ${_librpcsec_gss} libipsec \
libdwarf libedit ${_libefi} libexpat libfetch libftpio libgeom \
${_libgpib} ${_libgssapi} ${_librpcsec_gss} libipsec \
${_libipx} libjail libkiconv libmagic libmemstat ${_libmilter} \
${_libmp} ${_libncp} ${_libngatm} libopie libpam libpcap \
${_libpmc} libproc librt ${_libsdp} ${_libsm} ${_libsmb} \
@ -104,6 +104,7 @@ _libvgl= libvgl
.endif
.if ${MACHINE_ARCH} == "ia64"
_libefi= libefi
_libsmb= libsmb
.endif

22
lib/libefi/Makefile Normal file
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@ -0,0 +1,22 @@
# $FreeBSD$
.include <bsd.own.mk>
LIB= efi
SHLIB_MAJOR= 1
SRCS= libefi.c \
efi_getvar.c \
efi_nextvarname.c \
efi_setvar.c
CFLAGS+= -I${.CURDIR}
INCS= libefi.h
MAN+= libefi.3
MLINKS+=libefi.3 efi_getvar.3 \
libefi.3 efi_nextvarname.3 \
libefi.3 efi_setvar.3
.include <bsd.lib.mk>

68
lib/libefi/efi_getvar.c Normal file
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@ -0,0 +1,68 @@
/*-
* Copyright (c) 2010 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <libefi.h>
#include <stdlib.h>
#include "libefi_int.h"
/*
* EFI_STATUS
* GetVariable(
* IN CHAR16 *VariableName,
* IN EFI_GUID *VendorGuid,
* OUT UINT32 *Attributes OPTIONAL,
* IN OUT UINTN *DataSize,
* OUT VOID *Data
* );
*/
int
efi_getvar(char *name, uuid_t *vendor, uint32_t *attrib, size_t *datasize,
void *data)
{
struct iodev_efivar_req req;
int error;
req.namesize = 0;
error = libefi_utf8_to_ucs2(name, &req.namesize, &req.name);
if (error)
return (error);
req.vendor = *vendor;
req.datasize = *datasize;
req.data = data;
req.access = IODEV_EFIVAR_GETVAR;
error = libefi_efivar(&req);
*datasize = req.datasize;
if (!error && attrib != NULL)
*attrib = req.attrib;
free(req.name);
return (error);
}

66
lib/libefi/efi_nextvarname.c Normal file
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@ -0,0 +1,66 @@
/*-
* Copyright (c) 2010 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <libefi.h>
#include <stdlib.h>
#include "libefi_int.h"
/*
* EFI_STATUS
* GetNextVariableName(
* IN OUT UINTN *VariableNameSize,
* IN OUT CHAR16 *VariableName,
* IN OUT EFI_GUID *VendorGuid
* );
*/
int
efi_nextvarname(size_t *namesize, char *name, uuid_t *vendor)
{
struct iodev_efivar_req req;
int error;
req.namesize = *namesize;
error = libefi_utf8_to_ucs2(name, &req.namesize, &req.name);
if (error)
return (error);
req.vendor = *vendor;
req.access = IODEV_EFIVAR_NEXTNAME;
error = libefi_efivar(&req);
*namesize = req.namesize;
if (!error) {
error = libefi_ucs2_to_utf8(req.name, namesize, name);
if (!error)
*vendor = req.vendor;
}
free(req.name);
return (error);
}

66
lib/libefi/efi_setvar.c Normal file
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@ -0,0 +1,66 @@
/*-
* Copyright (c) 2010 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <libefi.h>
#include <stdlib.h>
#include "libefi_int.h"
/*
* EFI_STATUS
* SetVariable(
* IN CHAR16 *VariableName,
* IN EFI_GUID *VendorGuid,
* IN UINT32 Attributes,
* IN UINTN DataSize,
* IN VOID *Data
* );
*/
int
efi_setvar(char *name, uuid_t *vendor, uint32_t attrib, size_t datasize,
void *data)
{
struct iodev_efivar_req req;
int error;
req.namesize = 0;
error = libefi_utf8_to_ucs2(name, &req.namesize, &req.name);
if (error)
return (error);
req.vendor = *vendor;
req.attrib = attrib;
req.datasize = datasize;
req.data = data;
req.access = IODEV_EFIVAR_SETVAR;
error = libefi_efivar(&req);
free(req.name);
return (error);
}

136
lib/libefi/libefi.3 Normal file
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@ -0,0 +1,136 @@
.\"-
.\" Copyright (c) 2010 Marcel Moolenaar
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd Januari 29, 2010
.Dt LIBEFI 3
.Os
.Sh NAME
.Nm efi_getvar , efi_nextvarname , efi_setvar
.Nd Interface for accessing the EFI variable services
.Sh LIBRARY
.Lb libefi
.Sh SYNOPSIS
.In libefi.h
.Ft int
.Fn efi_getvar "char *name" "uuid_t *vendor" "uint32_t *attrib" \
"size_t *datasize" "void *data"
.Ft int
.Fn efi_nextvarname "size_t *namesize" "char *name" "uuid_t *vendor"
.Ft int
.Fn efi_setvar "char *name" "uuid_t *vendor" "uint32_t attrib" \
"size_t datasize" "void *data"
.Sh DESCRIPTION
The
.Nm libefi
library provides access to a select set of the runtime services of the
Extensible Firmware Interface (EFI).
.Pp
The
.Fn efi_nextvarname
function is used to enumerate the variables.
The
.Nm namesize
parameter needs to be set to the size of the buffer pointed to by
.Nm name .
On return,
.Nm namesize
is set to the length of the variable name (including the terminating '\\0')
irrespective of whether the buffer was big enough.
The buffer pointed to by
.Nm name
contains the full or partial variable name on return.
Only on successful completion of the request is the
.Nm vendor
updated.
The values returned should be passed to successive calls to
.Fn efi_nextvarname
until all variables have been enumerated.
.Pp
The variable name and vendor as returned by
.Fn efi_nextvarname
can be passed to
.Fn efi_getvar
to obtain the value and attribute of the variable.
The buffer that is to contain the value is specified by
.Nm data
and the size of the buffer is given by
.Nm datasize .
The attribute pointed to by
.Nm attrib
consists of the bit values defined by the EFI specification.
.Pp
Variables can be created, modified and deleted using the
.Fn efi_setvar
function.
All new variables must be non-volatile and runtime accessable in
order for the request to succeed.
Note that for runtime accessable variables the boottime accessable bit must
be set as well.
To delete a variable, set
.Nm datasize
to 0.
.Pp
The vendor UUID is used to avoid collisions between variable names of
different vendors.
Variables created for use by FreeBSD should use the
.Nm EFI_FREEBSD_VENDOR
UUID as defined in the
.Nm libefi
header file.
.Sh RETURN VALUES
Upon successful completion, these functions return 0.
Otherwise, the error number is returned.
These functions will fail if:
.Bl -tag -width Er
.It Bq Er EACCES
Insufficient permissions to access the EFI services.
.It Bq Er EILSEQ
The variable name is not in UTF-8.
.It Bq Er EINVAL
The request has invalid parameters.
.It Bq Er ENOENT
The variable does not exist or no more variables exist.
.It Bq Er ENOMEM
Temporary storage could not be allocated.
.It Bq Er EOVERFLOW
The variable name is too long or the data is too big to fit in
the buffer provided.
.El
.Sh SEE ALSO
.Xr errno 2 ,
.Xr uuid 3
.Sh HISTORY
The
.Nm libefi
library first appeared in
.Fx 9
for the ia64 architecture.
.Sh AUTHORS
The
.Nm libefi
library and corresponding manual page were written by
.An Marcel Moolenaar Aq marcel@FreeBSD.org .

176
lib/libefi/libefi.c Normal file
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@ -0,0 +1,176 @@
/*-
* Copyright (c) 2010 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/ioctl.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "libefi_int.h"
static int __iofd = -1;
static void
iodev_fd_close(void)
{
close(__iofd);
}
static int
iodev_fd(int *fd)
{
*fd = __iofd;
if (__iofd != -1)
return (0);
__iofd = open("/dev/io", O_RDWR);
if (__iofd == -1)
return (errno);
atexit(iodev_fd_close);
*fd = __iofd;
return (0);
}
int
libefi_ucs2_to_utf8(u_short *nm, size_t *szp, char *name)
{
size_t len, sz;
u_short c;
len = 0;
sz = *szp;
while (*nm) {
c = *nm++;
if (c > 0x7ff) {
if (len++ < sz)
*name++ = 0xE0 | (c >> 12);
if (len++ < sz)
*name++ = 0x80 | ((c >> 6) & 0x3f);
if (len++ < sz)
*name++ = 0x80 | (c & 0x3f);
} else if (c > 0x7f) {
if (len++ < sz)
*name++ = 0xC0 | ((c >> 6) & 0x1f);
if (len++ < sz)
*name++ = 0x80 | (c & 0x3f);
} else {
if (len++ < sz)
*name++ = (c & 0x7f);
}
}
if (len++ < sz)
*name++ = 0;
*szp = len;
return ((len <= sz) ? 0 : EOVERFLOW);
}
int
libefi_utf8_to_ucs2(char *name, size_t *szp, u_short **nmp)
{
u_short *nm;
size_t sz;
uint32_t ucs4;
int c, bytes;
*szp = sz = (*szp == 0) ? strlen(name) * 2 + 2 : *szp;
*nmp = nm = malloc(sz);
ucs4 = 0;
bytes = 0;
while (sz > 1 && *name != '\0') {
c = *name++;
/*
* Conditionalize on the two major character types:
* initial and followup characters.
*/
if ((c & 0xc0) != 0x80) {
/* Initial characters. */
if (bytes != 0) {
free(nm);
return (EILSEQ);
}
if ((c & 0xf8) == 0xf0) {
ucs4 = c & 0x07;
bytes = 3;
} else if ((c & 0xf0) == 0xe0) {
ucs4 = c & 0x0f;
bytes = 2;
} else if ((c & 0xe0) == 0xc0) {
ucs4 = c & 0x1f;
bytes = 1;
} else {
ucs4 = c & 0x7f;
bytes = 0;
}
} else {
/* Followup characters. */
if (bytes > 0) {
ucs4 = (ucs4 << 6) + (c & 0x3f);
bytes--;
} else if (bytes == 0) {
free(nm);
return (EILSEQ);
}
}
if (bytes == 0) {
if (ucs4 > 0xffff) {
free(nm);
return (EILSEQ);
}
*nm++ = (u_short)ucs4;
sz -= 2;
}
}
if (sz < 2) {
free(nm);
return (EDOOFUS);
}
*nm = 0;
return (0);
}
int
libefi_efivar(struct iodev_efivar_req *req)
{
int error, fd;
error = iodev_fd(&fd);
if (!error)
error = (ioctl(fd, IODEV_EFIVAR, req) == -1) ? errno : 0;
if (!error)
error = req->result;
return (error);
}

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lib/libefi/libefi.h Normal file
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/*-
* Copyright (c) 2010 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _LIBEFI_H_
#define _LIBEFI_H_
#include <sys/types.h>
#include <sys/uuid.h>
#include <stddef.h>
/* Attributes. */
#define EFI_ATTR_NV 0x0001 /* Variable stored in NVRAM. */
#define EFI_ATTR_BS 0x0002 /* Boot services accessable. */
#define EFI_ATTR_RT 0x0004 /* Runtime accessable. */
#define EFI_ATTR_HR 0x0008 /* Hardware error record. */
#define EFI_ATTR_WR 0x0010 /* Authenticated write access. */
/* Vendor for architecturally defined variables. */
#define EFI_GLOBAL_VARIABLE \
{0x8be4df61,0x93ca,0x11d2,0xaa,0x0d,{0x00,0xe0,0x98,0x03,0x2b,0x8c}}
/* Vendor for FreeBSD-specific variables. */
#define EFI_FREEBSD_VARIABLE \
{0x13c32014,0x0c9c,0x11df,0xa2,0x38,{0x00,0x17,0xa4,0xab,0x91,0x2d}}
__BEGIN_DECLS
int efi_getvar (char *, uuid_t *, uint32_t *, size_t *, void *);
int efi_nextvarname (size_t *, char *, uuid_t *);
int efi_setvar (char *, uuid_t *, uint32_t, size_t, void *);
__END_DECLS
#endif /* _LIBEFI_H_ */

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/*-
* Copyright (c) 2010 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _LIBEFI_INT_H_
#define _LIBEFI_INT_H_
#include <sys/errno.h>
#include <machine/iodev.h>
int libefi_ucs2_to_utf8(u_short *, size_t *, char *);
int libefi_utf8_to_ucs2(char *, size_t *, u_short **);
int libefi_efivar(struct iodev_efivar_req *);
#endif /* _LIBEFI_INT_H_ */