diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c')
| -rw-r--r-- | roms/edk2/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c b/roms/edk2/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c new file mode 100644 index 000000000..9acb1b79b --- /dev/null +++ b/roms/edk2/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c @@ -0,0 +1,62 @@ +/** @file
+ This library implement library class DxeServiceTableLib.
+ It produce EFI_DXE_SERVICE pointer in global variable gDS in library's constructure.
+
+ A DXE driver can use gDS pointer to access services in EFI_DXE_SERVICE, if this
+ DXE driver declare that use DxeServicesTableLib library class and link to this
+ library instance.
+
+ Please attention this library instance can not be used util EFI_SYSTEM_TABLE was
+ initialized.
+
+ This library contains construct function to retrieve EFI_DXE_SERVICE, this construct
+ function will be invoked in DXE driver's autogen file.
+
+ Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiDxe.h>
+#include <Guid/DxeServices.h>
+#include <Library/DxeServicesTableLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiLib.h>
+
+//
+// Cache copy of the DXE Services Table
+//
+EFI_DXE_SERVICES *gDS = NULL;
+
+/**
+ The constructor function caches the pointer of DXE Services Table.
+
+ The constructor function caches the pointer of DXE Services Table.
+ It will ASSERT() if that operation fails.
+ It will ASSERT() if the pointer of DXE Services Table is NULL.
+ It will always return EFI_SUCCESS.
+
+ @param ImageHandle The firmware allocated handle for the EFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+DxeServicesTableLibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Cache copy of the DXE Services Table
+ //
+ Status = EfiGetSystemConfigurationTable (&gEfiDxeServicesTableGuid, (VOID **) &gDS);
+ ASSERT_EFI_ERROR (Status);
+ ASSERT (gDS != NULL);
+
+ return Status;
+}
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