diff options
| author | Star Zeng <star.zeng@intel.com> | 2018-06-08 17:12:01 +0800 |
|---|---|---|
| committer | Star Zeng <star.zeng@intel.com> | 2018-09-27 14:25:32 +0800 |
| commit | af5e95215928e052445c473f1244412dadea8252 (patch) | |
| tree | bf5e36272f270442a78d9c6349898a977893009a /MdePkg/Include | |
| parent | 24c55f5dcc31e90c15fc23fb8fc7f1998f91f22d (diff) | |
| download | edk2-af5e95215928e052445c473f1244412dadea8252.tar.gz edk2-af5e95215928e052445c473f1244412dadea8252.tar.bz2 edk2-af5e95215928e052445c473f1244412dadea8252.zip | |
MdePkg UefiLib: Add new EfiLocateXXXAcpiTable() APIs
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 adds new EfiLocateXXXAcpiTable() APIs in UefiLib
for the request and also the following patch to remove the
duplicated code.
Cc: Younas khan <pmdyounaskhan786@gmail.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Diffstat (limited to 'MdePkg/Include')
| -rw-r--r-- | MdePkg/Include/Library/UefiLib.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/MdePkg/Include/Library/UefiLib.h b/MdePkg/Include/Library/UefiLib.h index f80067f111..468bffc3cb 100644 --- a/MdePkg/Include/Library/UefiLib.h +++ b/MdePkg/Include/Library/UefiLib.h @@ -26,6 +26,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #ifndef __UEFI_LIB_H__
#define __UEFI_LIB_H__
+#include <IndustryStandard/Acpi.h>
+
#include <Protocol/DriverBinding.h>
#include <Protocol/DriverConfiguration.h>
#include <Protocol/ComponentName.h>
@@ -1595,4 +1597,70 @@ EfiOpenFileByDevicePath ( IN UINT64 OpenMode,
IN UINT64 Attributes
);
+
+/**
+ This function locates next ACPI table in XSDT/RSDT based on Signature and
+ previous returned Table.
+
+ If PreviousTable is NULL:
+ This function will locate the first ACPI table in XSDT/RSDT based on
+ Signature in gEfiAcpi20TableGuid system configuration table first, and then
+ gEfiAcpi10TableGuid system configuration table.
+ This function will locate in XSDT first, and then RSDT.
+ For DSDT, this function will locate XDsdt in FADT first, and then Dsdt in
+ FADT.
+ For FACS, this function will locate XFirmwareCtrl in FADT first, and then
+ FirmwareCtrl in FADT.
+
+ If PreviousTable is not NULL:
+ 1. If it could be located in XSDT in gEfiAcpi20TableGuid system configuration
+ table, then this function will just locate next table in XSDT in
+ gEfiAcpi20TableGuid system configuration table.
+ 2. If it could be located in RSDT in gEfiAcpi20TableGuid system configuration
+ table, then this function will just locate next table in RSDT in
+ gEfiAcpi20TableGuid system configuration table.
+ 3. If it could be located in RSDT in gEfiAcpi10TableGuid system configuration
+ table, then this function will just locate next table in RSDT in
+ gEfiAcpi10TableGuid system configuration table.
+
+ It's not supported that PreviousTable is not NULL but PreviousTable->Signature
+ is not same with Signature, NULL will be returned.
+
+ @param Signature ACPI table signature.
+ @param PreviousTable Pointer to previous returned table to locate next
+ table, or NULL to locate first table.
+
+ @return Next ACPI table or NULL if not found.
+
+**/
+EFI_ACPI_COMMON_HEADER *
+EFIAPI
+EfiLocateNextAcpiTable (
+ IN UINT32 Signature,
+ IN EFI_ACPI_COMMON_HEADER *PreviousTable OPTIONAL
+ );
+
+/**
+ This function locates first ACPI table in XSDT/RSDT based on Signature.
+
+ This function will locate the first ACPI table in XSDT/RSDT based on
+ Signature in gEfiAcpi20TableGuid system configuration table first, and then
+ gEfiAcpi10TableGuid system configuration table.
+ This function will locate in XSDT first, and then RSDT.
+ For DSDT, this function will locate XDsdt in FADT first, and then Dsdt in
+ FADT.
+ For FACS, this function will locate XFirmwareCtrl in FADT first, and then
+ FirmwareCtrl in FADT.
+
+ @param Signature ACPI table signature.
+
+ @return First ACPI table or NULL if not found.
+
+**/
+EFI_ACPI_COMMON_HEADER *
+EFIAPI
+EfiLocateFirstAcpiTable (
+ IN UINT32 Signature
+ );
+
#endif
|