REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4659
When HPET timer is used as the timer interrupt and nested
interrupts into the HPET timer interrupt handler occur, the
elapsed time passed into the DXE Core is sometime too large
and this causes the DXE Core internal system time to run too
fast. Fix the logic so the previous main counter value stored
in the module global variable mPreviousMainCounter is always
captured before the timer notification function is called.
Without this change, mPreviousMainCounter is updated after
the timer notification function is called and when nesting
occurs, it updates with the value from the first level of
nesting which is further back in time than the interrupt from
the deepest level of nesting. This causes the next two timer
interrupts to compute a TimerPeriod that is twice the actual
time period since the last interrupt and this causes the DXE
Core internal time to run faster than expected.
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737
Apply uncrustify changes to .c/.h files in the PcAtChipsetPkg package
Cc: Andrew Fish <afish@apple.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3767
Update use of DEBUG_CODE(Expression) if Expression is a complex code
block with if/while/for/case statements that use {}.
Cc: Andrew Fish <afish@apple.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael Kubacki <michael.kubacki@microsoft.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
1. Do not use tab characters
2. No trailing white space in one line
3. All files must end with CRLF
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Correct the reported by the codespell utility in some files
of PcAtChipsetPkg.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
https://bugzilla.tianocore.org/show_bug.cgi?id=182
The function TimerDriverSetTimerPeriod() disables the HPET timer
while the HPET timer HW is reprogrammed with a new timer period.
However, the MMIO write to disable the HPET timer HW can be
delayed and an HPET timer interrupt may be processed in the middle
of reprogramming the HPET timer HW and this may produced unexpected
results.
The fix is to raise TPL to TPL_HIGH_LEVEL in
TimerDriverSetTimerPeriod() during the time the HPET timer HW is
reprogrammed. This guarantees that no timer interrupts are
processed during reprogramming.
The TimerDriverGenerateSoftInterrupt() function in this same
driver also raises TPL to TPL_HIGH_LEVEL, so this fix matches
the logic that is already used in another function for the same
reason.
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Comparator register automatically grow without breaking main counter register, this allow other driver to use HPET main counter.
Timer register overflow handle.
32-bit HPET timer support.
TimerDriverSetTimerPeriod is changed to handle HPET timer interrupt delivered into real mode.
Signed-off-by: li-elvin
Reviewed-by: vanjeff
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12700 6f19259b-4bc3-4df7-8a09-765794883524
Minor update to logic to prevent writing a the read-only MSI Capability bit with 0 when HPET supports MSIs
Signed-off-by: mdkinney
Reviewed-by: li-elvin
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12272 6f19259b-4bc3-4df7-8a09-765794883524
Michael D Kinney
Michael Kubacki
Sean Brogan
Liming Gao
Thomas Huth
Giri P Mudusuru
Tycho Nightingale
rsun3
li-elvin
mdkinney