https://bugzilla.tianocore.org/show_bug.cgi?id=967 Request to add a library function for GetAcpiTable() in order to get ACPI table using signature as input.
After evaluation, we found there are many duplicated code to find ACPI table by signature in different modules. This patch updates PcatRealTimeClockRuntimeDxe to use new EfiLocateFirstAcpiTable() and remove the duplicated code. Cc: Younas khan <[email protected]> Cc: Michael D Kinney <[email protected]> Cc: Liming Gao <[email protected]> Cc: Jiewen Yao <[email protected]> Cc: Ruiyu Ni <[email protected]> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Star Zeng <[email protected]> --- PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c | 80 +--------------------- 1 file changed, 3 insertions(+), 77 deletions(-) diff --git a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c index 2105acf35f7b..7965eb8aa55b 100644 --- a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c +++ b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c @@ -1203,49 +1203,6 @@ IsWithinOneDay ( } /** - This function find ACPI table with the specified signature in RSDT or XSDT. - - @param Sdt ACPI RSDT or XSDT. - @param Signature ACPI table signature. - @param TablePointerSize Size of table pointer: 4 or 8. - - @return ACPI table or NULL if not found. -**/ -VOID * -ScanTableInSDT ( - IN EFI_ACPI_DESCRIPTION_HEADER *Sdt, - IN UINT32 Signature, - IN UINTN TablePointerSize - ) -{ - UINTN Index; - UINTN EntryCount; - UINTN EntryBase; - EFI_ACPI_DESCRIPTION_HEADER *Table; - - EntryCount = (Sdt->Length - sizeof (EFI_ACPI_DESCRIPTION_HEADER)) / TablePointerSize; - - EntryBase = (UINTN) (Sdt + 1); - for (Index = 0; Index < EntryCount; Index++) { - // - // When TablePointerSize is 4 while sizeof (VOID *) is 8, make sure the upper 4 bytes are zero. - // - Table = 0; - CopyMem (&Table, (VOID *) (EntryBase + Index * TablePointerSize), TablePointerSize); - - if (Table == NULL) { - continue; - } - - if (Table->Signature == Signature) { - return Table; - } - } - - return NULL; -} - -/** Get the century RTC address from the ACPI FADT table. @return The century RTC address or 0 if not found. @@ -1255,42 +1212,11 @@ GetCenturyRtcAddress ( VOID ) { - EFI_STATUS Status; - EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *Rsdp; EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt; - Status = EfiGetSystemConfigurationTable (&gEfiAcpiTableGuid, (VOID **) &Rsdp); - if (EFI_ERROR (Status)) { - Status = EfiGetSystemConfigurationTable (&gEfiAcpi10TableGuid, (VOID **) &Rsdp); - } - - if (EFI_ERROR (Status) || (Rsdp == NULL)) { - return 0; - } - - Fadt = NULL; - - // - // Find FADT in XSDT - // - if (Rsdp->Revision >= EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER_REVISION && Rsdp->XsdtAddress != 0) { - Fadt = ScanTableInSDT ( - (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Rsdp->XsdtAddress, - EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE, - sizeof (UINTN) - ); - } - - // - // Find FADT in RSDT - // - if (Fadt == NULL && Rsdp->RsdtAddress != 0) { - Fadt = ScanTableInSDT ( - (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Rsdp->RsdtAddress, - EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE, - sizeof (UINT32) - ); - } + Fadt = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *) EfiLocateFirstAcpiTable ( + EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE + ); if ((Fadt != NULL) && (Fadt->Century > RTC_ADDRESS_REGISTER_D) && (Fadt->Century < 0x80) -- 2.7.0.windows.1 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
