Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: d98efb468211ab508710eac91761238e1f5c1d51
https://github.com/tianocore/edk2/commit/d98efb468211ab508710eac91761238e1f5c1d51
Author: Tan, Dun <dun....@intel.com>
Date: 2022-10-28 (Fri, 28 Oct 2022)
Changed paths:
M
UefiCpuPkg/Library/CpuExceptionHandlerLib/UnitTest/DxeCpuExceptionHandlerLibUnitTest.inf
M
UefiCpuPkg/Library/CpuExceptionHandlerLib/UnitTest/DxeCpuExceptionHandlerUnitTest.c
Log Message:
-----------
UefiCpuPkg: Restore HpetTimer after CpuExceptionHandlerLib test
Disable/Restore HpetTimer before and after running the Dxe
CpuExceptionHandlerLib unit test module. During the UnitTest, a
new Idt is initialized for the test. There is no handler for timer
intrrupt in this new idt. After the test module, HpetTimer does
not work any more since the comparator value register and main
counter value register for timer does not match. To fix this issue,
disable/restore HpetTimer before and after Unit Test if HpetTimer
driver has been dispatched. We don't need to send Apic Eoi in this
unit test module.When disabling timer, after RaiseTPL(), if there
is a pending timer interrupt, bit64 of Interrupt Request Register
(IRR) will be set to 1 to indicate there is a pending timer
interrupt. After RestoreTPL(), CPU will handle the pending
interrupt in IRR.Then TimerInterruptHandler calls SendApicEoi().
Signed-off-by: Dun Tan <dun....@intel.com>
Cc: Eric Dong <eric.d...@intel.com>
Reviewed-by: Ray Ni <ray...@intel.com>
Cc: Rahul Kumar <rahul1.ku...@intel.com>
Cc: Michael D Kinney <michael.d.kin...@intel.com>
_______________________________________________
edk2-commits mailing list
edk2-commits@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/edk2-commits
