CapsulePei/X64/X64Entry.c

	X64Entry.c revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
/** @file
  The X64 entrypoint is used to process capsule in long mode.

Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
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 <Library/DebugLib.h>
#include "CommonHeader.h"

/**
  The X64 entrypoint is used to process capsule in long mode then
  return to 32-bit protected mode.

  @param  EntrypointContext   Pointer to the context of long mode.
  @param  ReturnContext       Pointer to the context of 32-bit protected mode.

  @retval This function should never return actually.

**/
EFI_STATUS
EFIAPI
_ModuleEntryPoint (
  SWITCH_32_TO_64_CONTEXT       *EntrypointContext,
  SWITCH_64_TO_32_CONTEXT       *ReturnContext
)
{
  EFI_STATUS    Status;

  //
  // Call CapsuleDataCoalesce to process capsule.
  //
  Status = CapsuleDataCoalesce (
             NULL,
             (EFI_PHYSICAL_ADDRESS *) (UINTN) EntrypointContext->BlockListAddr,
             (VOID **) (UINTN) EntrypointContext->MemoryBase64Ptr,
             (UINTN *) (UINTN) EntrypointContext->MemorySize64Ptr
             );

  ReturnContext->ReturnStatus = Status;

  //
  // Finish to coalesce capsule, and return to 32-bit mode.
  //
  AsmDisablePaging64 (
    ReturnContext->ReturnCs,
    (UINT32) ReturnContext->ReturnEntryPoint,
    (UINT32) (UINTN) EntrypointContext,
    (UINT32) (UINTN) ReturnContext,
    (UINT32) (EntrypointContext->StackBufferBase + EntrypointContext->StackBufferLength)
    );

  //
  // Should never be here.
  //
  ASSERT (FALSE);
  return EFI_SUCCESS;
}