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authormdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524>2011-09-02 15:30:54 +0000
committermdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524>2011-09-02 15:30:54 +0000
commit0cdda8d6f0b48bb1f998c1e7487877331c5cae8c (patch)
tree4813b7ce5a2834463039f7eb58f3bc65969b2fa7 /PcAtChipsetPkg
parent5025be3fc17bc3873e20fda0abb7ca2e7591261d (diff)
downloadedk2-platforms-0cdda8d6f0b48bb1f998c1e7487877331c5cae8c.tar.xz
Add generic HPET Timer DXE Driver and support libraries.
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
Diffstat (limited to 'PcAtChipsetPkg')
-rw-r--r--PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c b/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c
index 025d504fc4..b38963157c 100644
--- a/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c
+++ b/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c
@@ -440,7 +440,7 @@ TimerDriverSetTimerPeriod (
// If TimerPeriod is 0, then mask HPET Timer interrupts
//
- if (mTimerConfiguration.Bits.MsiInterruptCapablity != 0) {
+ if (mTimerConfiguration.Bits.MsiInterruptCapablity != 0 && FeaturePcdGet (PcdHpetMsiEnable)) {
//
// Disable HPET MSI interrupt generation
//
@@ -498,7 +498,7 @@ TimerDriverSetTimerPeriod (
//
// Enable HPET Timer interrupt generation
//
- if (mTimerConfiguration.Bits.MsiInterruptCapablity != 0) {
+ if (mTimerConfiguration.Bits.MsiInterruptCapablity != 0 && FeaturePcdGet (PcdHpetMsiEnable)) {
//
// Enable HPET MSI Interrupt
//
@@ -789,7 +789,6 @@ TimerDriverInitialize (
// Set InterruptRoute field based in mTimerIrq
//
mTimerConfiguration.Uint64 = HpetRead (HPET_TIMER_CONFIGURATION_OFFSET + mTimerIndex * HPET_TIMER_STRIDE);
- mTimerConfiguration.Bits.MsiInterruptCapablity = 0;
mTimerConfiguration.Bits.LevelTriggeredInterrupt = 1;
mTimerConfiguration.Bits.InterruptRoute = mTimerIrq;
}
@@ -829,7 +828,7 @@ TimerDriverInitialize (
// Show state of enabled HPET timer
//
DEBUG_CODE (
- if (mTimerConfiguration.Bits.MsiInterruptCapablity != 0) {
+ if (mTimerConfiguration.Bits.MsiInterruptCapablity != 0 && FeaturePcdGet (PcdHpetMsiEnable)) {
DEBUG ((DEBUG_INFO, "HPET Interrupt Mode MSI\n"));
} else {
DEBUG ((DEBUG_INFO, "HPET Interrupt Mode I/O APIC\n"));