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 IntelVTdDxe 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]> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Star Zeng <[email protected]> --- .../Feature/VTd/IntelVTdDxe/DmarAcpiTable.c | 136 +-------------------- 1 file changed, 3 insertions(+), 133 deletions(-) diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmarAcpiTable.c b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmarAcpiTable.c index 24723fe4972a..92b09f985533 100644 --- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmarAcpiTable.c +++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmarAcpiTable.c @@ -868,116 +868,6 @@ ParseDmarAcpiTableRmrr ( } /** - This function scan ACPI table in RSDT. - - @param[in] Rsdt ACPI RSDT - @param[in] Signature ACPI table signature - - @return ACPI table -**/ -VOID * -ScanTableInRSDT ( - IN RSDT_TABLE *Rsdt, - IN UINT32 Signature - ) -{ - UINTN Index; - UINT32 EntryCount; - UINT32 *EntryPtr; - EFI_ACPI_DESCRIPTION_HEADER *Table; - - EntryCount = (Rsdt->Header.Length - sizeof (EFI_ACPI_DESCRIPTION_HEADER)) / sizeof(UINT32); - - EntryPtr = &Rsdt->Entry; - for (Index = 0; Index < EntryCount; Index ++, EntryPtr ++) { - Table = (EFI_ACPI_DESCRIPTION_HEADER*)((UINTN)(*EntryPtr)); - if ((Table != NULL) && (Table->Signature == Signature)) { - return Table; - } - } - - return NULL; -} - -/** - This function scan ACPI table in XSDT. - - @param[in] Xsdt ACPI XSDT - @param[in] Signature ACPI table signature - - @return ACPI table -**/ -VOID * -ScanTableInXSDT ( - IN XSDT_TABLE *Xsdt, - IN UINT32 Signature - ) -{ - UINTN Index; - UINT32 EntryCount; - UINT64 EntryPtr; - UINTN BasePtr; - EFI_ACPI_DESCRIPTION_HEADER *Table; - - EntryCount = (Xsdt->Header.Length - sizeof (EFI_ACPI_DESCRIPTION_HEADER)) / sizeof(UINT64); - - BasePtr = (UINTN)(&(Xsdt->Entry)); - for (Index = 0; Index < EntryCount; Index ++) { - CopyMem (&EntryPtr, (VOID *)(BasePtr + Index * sizeof(UINT64)), sizeof(UINT64)); - Table = (EFI_ACPI_DESCRIPTION_HEADER*)((UINTN)(EntryPtr)); - if ((Table != NULL) && (Table->Signature == Signature)) { - return Table; - } - } - - return NULL; -} - -/** - This function scan ACPI table in RSDP. - - @param[in] Rsdp ACPI RSDP - @param[in] Signature ACPI table signature - - @return ACPI table -**/ -VOID * -FindAcpiPtr ( - IN EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *Rsdp, - IN UINT32 Signature - ) -{ - EFI_ACPI_DESCRIPTION_HEADER *AcpiTable; - RSDT_TABLE *Rsdt; - XSDT_TABLE *Xsdt; - - AcpiTable = NULL; - - // - // Check ACPI2.0 table - // - Rsdt = (RSDT_TABLE *)(UINTN)Rsdp->RsdtAddress; - Xsdt = NULL; - if ((Rsdp->Revision >= 2) && (Rsdp->XsdtAddress < (UINT64)(UINTN)-1)) { - Xsdt = (XSDT_TABLE *)(UINTN)Rsdp->XsdtAddress; - } - // - // Check Xsdt - // - if (Xsdt != NULL) { - AcpiTable = ScanTableInXSDT (Xsdt, Signature); - } - // - // Check Rsdt - // - if ((AcpiTable == NULL) && (Rsdt != NULL)) { - AcpiTable = ScanTableInRSDT (Rsdt, Signature); - } - - return AcpiTable; -} - -/** Get the DMAR ACPI table. @retval EFI_SUCCESS The DMAR ACPI table is got. @@ -989,33 +879,13 @@ GetDmarAcpiTable ( VOID ) { - VOID *AcpiTable; - EFI_STATUS Status; - if (mAcpiDmarTable != NULL) { return EFI_ALREADY_STARTED; } - AcpiTable = NULL; - Status = EfiGetSystemConfigurationTable ( - &gEfiAcpi20TableGuid, - &AcpiTable - ); - if (EFI_ERROR (Status)) { - Status = EfiGetSystemConfigurationTable ( - &gEfiAcpi10TableGuid, - &AcpiTable - ); - } - if (EFI_ERROR (Status)) { - return EFI_NOT_FOUND; - } - ASSERT (AcpiTable != NULL); - - mAcpiDmarTable = FindAcpiPtr ( - (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)AcpiTable, - EFI_ACPI_4_0_DMA_REMAPPING_TABLE_SIGNATURE - ); + mAcpiDmarTable = (EFI_ACPI_DMAR_HEADER *) EfiLocateFirstAcpiTable ( + EFI_ACPI_4_0_DMA_REMAPPING_TABLE_SIGNATURE + ); if (mAcpiDmarTable == NULL) { return EFI_NOT_FOUND; } -- 2.7.0.windows.1 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
