Implement the simulation version of StallPei for NT32 platform. It bases on window API Sleep().

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9663 6f19259b-4bc3-4df7-8a09-765794883524
2010-01-04 04:45:44 +00:00
parent 8d415937c8
commit ba82cb67d7
4 changed files with 157 additions and 0 deletions
--- a/Nt32Pkg/StallPei/Stall.c
+++ b/Nt32Pkg/StallPei/Stall.c
@@ -0,0 +1,107 @@
+/**@file
+  EFI_PEI_STALL implementation for NT32 simulation environment.
+  
+Copyright (c) 2009, Intel Corporation                                                         
+All rights reserved. This program and the accompanying materials                          
+are licensed and made available under the terms and conditions of the BSD License         
+which accompanies this distribution.  The full text of the license may be found at        
+http://opensource.org/licenses/bsd-license.php                                            
+                                                                                          
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+
+**/
+#include "WinNtPeim.h"
+
+#include <Ppi/NtThunk.h>
+#include <Ppi/Stall.h>
+#include <Library/DebugLib.h>
+
+EFI_STATUS
+EFIAPI 
+Stall (
+  IN CONST EFI_PEI_SERVICES     **PeiServices,
+  IN CONST EFI_PEI_STALL_PPI    *This,
+  IN UINTN                      Microseconds
+  );
+  
+EFI_PEI_STALL_PPI mStallPpi = {1000, Stall};
+
+EFI_PEI_PPI_DESCRIPTOR  mPpiListStall[1] = {
+  {
+    (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+    &gEfiPeiStallPpiGuid,
+    &mStallPpi
+  }
+};
+
+
+/**
+  PEIM's entry point.
+  
+  This routine installs the simulation instance of EFI_PEI_STALL_PPI based
+  on Win API Sleep().
+  
+  @param  FileHandle  Handle of the file being invoked. 
+  @param  PeiServices Describes the list of possible PEI Services.
+
+  @retval  EFI_SUCCESS   The PEIM executed normally.
+  @retval  !EFI_SUCCESS  The PEIM failed to execute normally.
+**/
+EFI_STATUS
+EFIAPI
+InitializeStall (
+  IN       EFI_PEI_FILE_HANDLE  FileHandle,
+  IN CONST EFI_PEI_SERVICES     **PeiServices
+  )
+{
+  EFI_STATUS  Status;
+  Status = (*PeiServices)->InstallPpi (PeiServices, &mPpiListStall[0]);
+  ASSERT_EFI_ERROR (Status);
+
+  return Status;
+}
+
+/**
+  The Stall() function provides a blocking stall for at least the number 
+  of microseconds stipulated in the final argument of the API.
+
+  @param  PeiServices    An indirect pointer to the PEI Services Table
+                         published by the PEI Foundation.
+  @param  This           Pointer to the local data for the interface.
+  @param  Microseconds   Number of microseconds for which to stall.
+
+  @retval EFI_SUCCESS    The service provided at least the required delay.
+
+**/
+EFI_STATUS
+EFIAPI 
+Stall (
+  IN CONST EFI_PEI_SERVICES     **PeiServices,
+  IN CONST EFI_PEI_STALL_PPI    *This,
+  IN UINTN                      Microseconds
+  )
+{
+  EFI_STATUS                Status;
+  PEI_NT_THUNK_PPI          *PeiNtService;
+  EFI_WIN_NT_THUNK_PROTOCOL *NtThunk;
+  
+  Status = (**PeiServices).LocatePpi (
+                            (const EFI_PEI_SERVICES **)PeiServices,
+                            &gPeiNtThunkPpiGuid,
+                            0,                  
+                            NULL,
+                            (VOID**)&PeiNtService
+                            );
+  ASSERT_EFI_ERROR (Status);
+    
+  //
+  // Calculate the time to sleep.  Win API smallest unit to sleep is 1 millisec
+  // so micro second units need be divided by 1000 to convert to ms
+  //
+  NtThunk = (EFI_WIN_NT_THUNK_PROTOCOL*) PeiNtService->NtThunk();
+  NtThunk->Sleep ((Microseconds + 999) / 1000); 
+  
+  return EFI_SUCCESS;
+}
+