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Diffstat (limited to 'sys/boot/efi/libefi/time.c')
| -rw-r--r-- | sys/boot/efi/libefi/time.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/sys/boot/efi/libefi/time.c b/sys/boot/efi/libefi/time.c new file mode 100644 index 0000000..c862c4c --- /dev/null +++ b/sys/boot/efi/libefi/time.c @@ -0,0 +1,216 @@ +/* $FreeBSD$ */ +/* + * Copyright (c) 1999, 2000 + * Intel Corporation. + * 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. + * + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * + * This product includes software developed by Intel Corporation and + * its contributors. + * + * 4. Neither the name of Intel Corporation or its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION 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 INTEL CORPORATION 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 <efi.h> +#include <efilib.h> + +#include <time.h> +#include <sys/time.h> + +// +// Accurate only for the past couple of centuries; +// that will probably do. +// +// (#defines From FreeBSD 3.2 lib/libc/stdtime/tzfile.h) +// + +#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) +#define SECSPERHOUR ( 60*60 ) +#define SECSPERDAY (24 * SECSPERHOUR) + +time_t +EfiTimeToUnixTime(EFI_TIME *ETime) +{ + // + // These arrays give the cumulative number of days up to the first of the + // month number used as the index (1 -> 12) for regular and leap years. + // The value at index 13 is for the whole year. + // + static time_t CumulativeDays[2][14] = { + {0, + 0, + 31, + 31 + 28, + 31 + 28 + 31, + 31 + 28 + 31 + 30, + 31 + 28 + 31 + 30 + 31, + 31 + 28 + 31 + 30 + 31 + 30, + 31 + 28 + 31 + 30 + 31 + 30 + 31, + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31, + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30, + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }, + {0, + 0, + 31, + 31 + 29, + 31 + 29 + 31, + 31 + 29 + 31 + 30, + 31 + 29 + 31 + 30 + 31, + 31 + 29 + 31 + 30 + 31 + 30, + 31 + 29 + 31 + 30 + 31 + 30 + 31, + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31, + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30, + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }}; + + time_t UTime; + int Year; + + // + // Do a santity check + // + if ( ETime->Year < 1998 || ETime->Year > 2099 || + ETime->Month == 0 || ETime->Month > 12 || + ETime->Day == 0 || ETime->Month > 31 || + ETime->Hour > 23 || + ETime->Minute > 59 || + ETime->Second > 59 || + ETime->TimeZone < -1440 || + (ETime->TimeZone > 1440 && ETime->TimeZone != 2047) ) { + return (0); + } + + // + // Years + // + UTime = 0; + for (Year = 1970; Year != ETime->Year; ++Year) { + UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY); + } + + // + // UTime should now be set to 00:00:00 on Jan 1 of the file's year. + // + // Months + // + UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] * SECSPERDAY); + + // + // UTime should now be set to 00:00:00 on the first of the file's month and year + // + // Days -- Don't count the file's day + // + UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY); + + // + // Hours + // + UTime += (ETime->Hour * SECSPERHOUR); + + // + // Minutes + // + UTime += (ETime->Minute * 60); + + // + // Seconds + // + UTime += ETime->Second; + + // + // EFI time is repored in local time. Adjust for any time zone offset to + // get true UT + // + if ( ETime->TimeZone != EFI_UNSPECIFIED_TIMEZONE ) { + // + // TimeZone is kept in minues... + // + UTime += (ETime->TimeZone * 60); + } + + return UTime; +} + +int +EFI_GetTimeOfDay( + OUT struct timeval *tp, + OUT struct timezone *tzp + ) +{ + EFI_TIME EfiTime; + EFI_TIME_CAPABILITIES Capabilities; + EFI_STATUS Status; + + // + // Get time from EFI + // + + Status = RS->GetTime( &EfiTime, &Capabilities ); + if (EFI_ERROR(Status)) + return (-1); + + // + // Convert to UNIX time (ie seconds since the epoch + // + + tp->tv_sec = EfiTimeToUnixTime( &EfiTime ); + tp->tv_usec = 0; // EfiTime.Nanosecond * 1000; + + // + // Do something with the timezone if needed + // + + if (tzp) { + tzp->tz_minuteswest = + EfiTime.TimeZone == EFI_UNSPECIFIED_TIMEZONE ? 0 : EfiTime.TimeZone; + // + // This isn't quit right since it doesn't deal with EFI_TIME_IN_DAYLIGHT + // + tzp->tz_dsttime = + EfiTime.Daylight & EFI_TIME_ADJUST_DAYLIGHT ? 1 : 0; + } + + return (0); +} + +time_t +time(time_t *tloc) +{ + struct timeval tv; + EFI_GetTimeOfDay(&tv, 0); + + if (tloc) + *tloc = tv.tv_sec; + return tv.tv_sec; +} |
