RuntimeLib.c

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#include <Uefi.h>
#include <Library/UefiRuntimeLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Guid/EventGroup.h>
 
EFI_EVENT             mEfiVirtualNotifyEvent;
EFI_EVENT             mEfiExitBootServicesEvent;
BOOLEAN               mEfiGoneVirtual = FALSE;
BOOLEAN               mEfiAtRuntime   = FALSE;
EFI_RUNTIME_SERVICES  *mInternalRT;
 
VOID
EFIAPI
RuntimeLibExitBootServicesEvent (
  IN EFI_EVENT  Event,
  IN VOID       *Context
  )
{
  mEfiAtRuntime = TRUE;
}
 
VOID
EFIAPI
RuntimeLibVirtualNotifyEvent (
  IN EFI_EVENT  Event,
  IN VOID       *Context
  )
{
  //
  // Update global for Runtime Services Table and IO
  //
  EfiConvertPointer (0, (VOID **)&mInternalRT);
 
  mEfiGoneVirtual = TRUE;
}
 
EFI_STATUS
EFIAPI
RuntimeDriverLibConstruct (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;
 
  ASSERT (gRT != NULL);
  ASSERT (gBS != NULL);
 
  mInternalRT = gRT;
  //
  // Register SetVirtualAddressMap () notify function
  //
  Status = gBS->CreateEvent (
                  EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE,
                  TPL_NOTIFY,
                  RuntimeLibVirtualNotifyEvent,
                  NULL,
                  &mEfiVirtualNotifyEvent
                  );
 
  ASSERT_EFI_ERROR (Status);
 
  Status = gBS->CreateEvent (
                  EVT_SIGNAL_EXIT_BOOT_SERVICES,
                  TPL_NOTIFY,
                  RuntimeLibExitBootServicesEvent,
                  NULL,
                  &mEfiExitBootServicesEvent
                  );
 
  ASSERT_EFI_ERROR (Status);
 
  return Status;
}
 
EFI_STATUS
EFIAPI
RuntimeDriverLibDeconstruct (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;
 
  //
  // Close SetVirtualAddressMap () notify function
  //
  ASSERT (gBS != NULL);
  Status = gBS->CloseEvent (mEfiVirtualNotifyEvent);
  ASSERT_EFI_ERROR (Status);
 
  Status = gBS->CloseEvent (mEfiExitBootServicesEvent);
  ASSERT_EFI_ERROR (Status);
 
  return Status;
}
 
BOOLEAN
EFIAPI
EfiAtRuntime (
  VOID
  )
{
  return mEfiAtRuntime;
}
 
BOOLEAN
EFIAPI
EfiGoneVirtual (
  VOID
  )
{
  return mEfiGoneVirtual;
}
 
VOID
EFIAPI
EfiResetSystem (
  IN EFI_RESET_TYPE  ResetType,
  IN EFI_STATUS      ResetStatus,
  IN UINTN           DataSize,
  IN VOID            *ResetData OPTIONAL
  )
{
  mInternalRT->ResetSystem (ResetType, ResetStatus, DataSize, ResetData);
}
 
EFI_STATUS
EFIAPI
EfiGetTime (
  OUT EFI_TIME               *Time,
  OUT EFI_TIME_CAPABILITIES  *Capabilities  OPTIONAL
  )
{
  return mInternalRT->GetTime (Time, Capabilities);
}
 
EFI_STATUS
EFIAPI
EfiSetTime (
  IN EFI_TIME  *Time
  )
{
  return mInternalRT->SetTime (Time);
}
 
EFI_STATUS
EFIAPI
EfiGetWakeupTime (
  OUT BOOLEAN   *Enabled,
  OUT BOOLEAN   *Pending,
  OUT EFI_TIME  *Time
  )
{
  return mInternalRT->GetWakeupTime (Enabled, Pending, Time);
}
 
EFI_STATUS
EFIAPI
EfiSetWakeupTime (
  IN BOOLEAN   Enable,
  IN EFI_TIME  *Time   OPTIONAL
  )
{
  return mInternalRT->SetWakeupTime (Enable, Time);
}
 
EFI_STATUS
EFIAPI
EfiGetVariable (
  IN      CHAR16    *VariableName,
  IN      EFI_GUID  *VendorGuid,
  OUT     UINT32    *Attributes OPTIONAL,
  IN OUT  UINTN     *DataSize,
  OUT     VOID      *Data
  )
{
  return mInternalRT->GetVariable (VariableName, VendorGuid, Attributes, DataSize, Data);
}
 
EFI_STATUS
EFIAPI
EfiGetNextVariableName (
  IN OUT UINTN     *VariableNameSize,
  IN OUT CHAR16    *VariableName,
  IN OUT EFI_GUID  *VendorGuid
  )
{
  return mInternalRT->GetNextVariableName (VariableNameSize, VariableName, VendorGuid);
}
 
EFI_STATUS
EFIAPI
EfiSetVariable (
  IN CHAR16    *VariableName,
  IN EFI_GUID  *VendorGuid,
  IN UINT32    Attributes,
  IN UINTN     DataSize,
  IN VOID      *Data
  )
{
  return mInternalRT->SetVariable (VariableName, VendorGuid, Attributes, DataSize, Data);
}
 
EFI_STATUS
EFIAPI
EfiGetNextHighMonotonicCount (
  OUT UINT32  *HighCount
  )
{
  return mInternalRT->GetNextHighMonotonicCount (HighCount);
}
 
EFI_STATUS
EFIAPI
EfiConvertPointer (
  IN UINTN     DebugDisposition,
  IN OUT VOID  **Address
  )
{
  return gRT->ConvertPointer (DebugDisposition, Address);
}
 
EFI_STATUS
EFIAPI
EfiConvertFunctionPointer (
  IN UINTN     DebugDisposition,
  IN OUT VOID  **Address
  )
{
  return EfiConvertPointer (DebugDisposition, Address);
}
 
EFI_STATUS
EFIAPI
EfiConvertList (
  IN UINTN           DebugDisposition,
  IN OUT LIST_ENTRY  *ListHead
  )
{
  LIST_ENTRY  *Link;
  LIST_ENTRY  *NextLink;
 
  //
  // For NULL List, return EFI_SUCCESS
  //
  if (ListHead == NULL) {
    return EFI_SUCCESS;
  }
 
  //
  // Convert all the ForwardLink & BackLink pointers in the list
  //
  Link = ListHead;
  do {
    NextLink = Link->ForwardLink;
 
    EfiConvertPointer (
      Link->ForwardLink == ListHead ? DebugDisposition : 0,
      (VOID **)&Link->ForwardLink
      );
 
    EfiConvertPointer (
      Link->BackLink == ListHead ? DebugDisposition : 0,
      (VOID **)&Link->BackLink
      );
 
    Link = NextLink;
  } while (Link != ListHead);
 
  return EFI_SUCCESS;
}
 
EFI_STATUS
EFIAPI
EfiSetVirtualAddressMap (
  IN UINTN                        MemoryMapSize,
  IN UINTN                        DescriptorSize,
  IN UINT32                       DescriptorVersion,
  IN CONST EFI_MEMORY_DESCRIPTOR  *VirtualMap
  )
{
  return mInternalRT->SetVirtualAddressMap (
                        MemoryMapSize,
                        DescriptorSize,
                        DescriptorVersion,
                        (EFI_MEMORY_DESCRIPTOR *)VirtualMap
                        );
}
 
EFI_STATUS
EFIAPI
EfiUpdateCapsule (
  IN EFI_CAPSULE_HEADER    **CapsuleHeaderArray,
  IN UINTN                 CapsuleCount,
  IN EFI_PHYSICAL_ADDRESS  ScatterGatherList OPTIONAL
  )
{
  return mInternalRT->UpdateCapsule (
                        CapsuleHeaderArray,
                        CapsuleCount,
                        ScatterGatherList
                        );
}
 
EFI_STATUS
EFIAPI
EfiQueryCapsuleCapabilities (
  IN  EFI_CAPSULE_HEADER  **CapsuleHeaderArray,
  IN  UINTN               CapsuleCount,
  OUT UINT64              *MaximumCapsuleSize,
  OUT EFI_RESET_TYPE      *ResetType
  )
{
  return mInternalRT->QueryCapsuleCapabilities (
                        CapsuleHeaderArray,
                        CapsuleCount,
                        MaximumCapsuleSize,
                        ResetType
                        );
}
 
EFI_STATUS
EFIAPI
EfiQueryVariableInfo (
  IN UINT32   Attributes,
  OUT UINT64  *MaximumVariableStorageSize,
  OUT UINT64  *RemainingVariableStorageSize,
  OUT UINT64  *MaximumVariableSize
  )
{
  return mInternalRT->QueryVariableInfo (
                        Attributes,
                        MaximumVariableStorageSize,
                        RemainingVariableStorageSize,
                        MaximumVariableSize
                        );
}