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The message "LibGetTime: RtcEpochSeconds non volatile variable was not
found - Using compilation time epoch." can be printed a very large
number of times, causing log files to become excessively large. This is
because the RtcEpochSeconds variable only gets set if LibSetTime is
called, for example by running 'time 12:00' in the UEFI Shell.
Avoid this by setting RtcEpochSeconds to BUILD_EPOCH (EpochSeconds)
after printing the message. It's set to a volatile variable so the
message will be displayed on future boots and not hidden.
Commit 44ae214591e58af468eacb7b873eaa0bc187c4fa reduced the verbosity of
the message to DEBUG_VERBOSE. Revert it back to DEBUG_INFO so it's more
prominent now that it doesn't get printed so frequently.
Signed-off-by: Rebecca Cran <rebecca@nuviainc.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>
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The DEBUG message for using compilation time epoch is appearing very
frequently on DEBUG firmware builds, for example during UEFI SCT runs.
Reduce verbosity to avoid the annoying repetitive message.
Signed-off-by: Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
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Addresses BZ https://bugzilla.tianocore.org/show_bug.cgi?id=2380 where
explicit casts are required for 64 to 32 bit assignment.
We can apply a straight cast for Time->Nanosecond since we already checked
for overflow.
On the other hand, we may have a frequency that is greater than UINT32_MAX
for Capabilities->Resolution. But using the frequency for the resolution
is the wrong approach anyway, since we can't actually vouch for the actual
resolution of the virtual library. Instead, play it safe by defaulting to
1 Hz, which is what a standard PC-AT CMOS RTC device would use.
Signed-off-by: Pete Batard <pete@akeo.ie>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
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https://bugzilla.tianocore.org/show_bug.cgi?id=1373
Replace BSD 2-Clause License with BSD+Patent License. This change is
based on the following emails:
https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html
https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html
RFCs with detailed process for the license change:
V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html
V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html
V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
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LibGetTime():
- Two variables were used for the epoch, where only one should have been [*].
- Also harmonize variable name to match the one used in LibSetTime.
LibSetTime():
- Address possible underflows if time is set to start of epoch.
- Ensure that time being read does actually match time that was manually
set (plus the time elapsed since), by subtracting number of seconds
since reset.
[*] This fixes a build breakage, since one of these variables was set but
never used, triggering a compiler diagnostic at some optimization levels.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Pete Batard <pete@akeo.ie>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
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This is designed to be used on platforms where a a real RTC is not
available and relies on an RtcEpochSeconds variable having been set or,
if that is not the case, falls back to using the epoch embedded at
compilation time.
Note that, in order to keep things simple for the setting of the
compilation time variable, only GCC environments with UNIX-like shells
and where a 'date' command is available are meant to be supported for
now.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Pete Batard <pete@akeo.ie>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
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