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PcAtChipsetPkg/PcRtc: move ACPI parsing code to GetCenturyRtcAddress 

The patch moves ACPI parsing code to a separate function
GetCenturyRtcAddress() and the next patch will call this
function in driver entry point.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Anbazhagan Baraneedharan <anbazhagan@hp.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Cc: Star Zeng <star.zeng@intel.com>
This commit is contained in:
Ruiyu Ni 2016-05-18 13:14:35 +08:00
parent 6f6bf5c772
commit 9e11e9225a
1 changed files with 38 additions and 18 deletions
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54
PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c
View File

@ -1239,20 +1239,13 @@ ScanTableInSDT (
} }
/** /**
Notification function of ACPI Table change. Get the century RTC address from the ACPI FADT table.
This is a notification function registered on ACPI Table change event.
It saves the Century address stored in ACPI FADT table.
@param Event Event whose notification function is being invoked.
@param Context Pointer to the notification function's context.
@return The century RTC address or 0 if not found.
**/ **/
UINT8
GetCenturyRtcAddress (
VOID VOID
EFIAPI
PcRtcAcpiTableChangeCallback (
IN EFI_EVENT Event,
IN VOID *Context
) )
{ {
EFI_STATUS Status; EFI_STATUS Status;
@ -1260,8 +1253,6 @@ PcRtcAcpiTableChangeCallback (
EFI_ACPI_DESCRIPTION_HEADER *Rsdt; EFI_ACPI_DESCRIPTION_HEADER *Rsdt;
EFI_ACPI_DESCRIPTION_HEADER *Xsdt; EFI_ACPI_DESCRIPTION_HEADER *Xsdt;
EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt; EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt;
EFI_TIME Time;
UINT8 Century;
Status = EfiGetSystemConfigurationTable (&gEfiAcpiTableGuid, (VOID **) &Rsdp); Status = EfiGetSystemConfigurationTable (&gEfiAcpiTableGuid, (VOID **) &Rsdp);
if (EFI_ERROR (Status)) { if (EFI_ERROR (Status)) {
@ -1269,7 +1260,7 @@ PcRtcAcpiTableChangeCallback (
} }
if (EFI_ERROR (Status)) { if (EFI_ERROR (Status)) {
return; return 0;
} }
ASSERT (Rsdp != NULL); ASSERT (Rsdp != NULL);
@ -1292,10 +1283,39 @@ PcRtcAcpiTableChangeCallback (
} }
if ((Fadt != NULL) && if ((Fadt != NULL) &&
(Fadt->Century > RTC_ADDRESS_REGISTER_D) && (Fadt->Century < 0x80) && (Fadt->Century > RTC_ADDRESS_REGISTER_D) && (Fadt->Century < 0x80)
(mModuleGlobal.CenturyRtcAddress != Fadt->Century)
) { ) {
mModuleGlobal.CenturyRtcAddress = Fadt->Century; return Fadt->Century;
} else {
return 0;
}
}
/**
Notification function of ACPI Table change.
This is a notification function registered on ACPI Table change event.
It saves the Century address stored in ACPI FADT table.
@param Event Event whose notification function is being invoked.
@param Context Pointer to the notification function's context.
**/
VOID
EFIAPI
PcRtcAcpiTableChangeCallback (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
EFI_TIME Time;
UINT8 CenturyRtcAddress;
UINT8 Century;
CenturyRtcAddress = GetCenturyRtcAddress ();
if ((CenturyRtcAddress != 0) && (mModuleGlobal.CenturyRtcAddress != CenturyRtcAddress)) {
mModuleGlobal.CenturyRtcAddress = CenturyRtcAddress;
Status = PcRtcGetTime (&Time, NULL, &mModuleGlobal); Status = PcRtcGetTime (&Time, NULL, &mModuleGlobal);
if (!EFI_ERROR (Status)) { if (!EFI_ERROR (Status)) {
Century = (UINT8) (Time.Year / 100); Century = (UINT8) (Time.Year / 100);