1) Make a slightly better work around for the EdkDxeSalLib by removing constructor...

[mirror_edk2.git] / EdkModulePkg / Library / EdkDxeSalLib / Ipf / EsalServiceLib.c

/*++\r
\r
Copyright (c) 2006, Intel Corporation                                                         \r
All rights reserved. This program and the accompanying materials                          \r
are licensed and made available under the terms and conditions of the BSD License         \r
which accompanies this distribution.  The full text of the license may be found at        \r
http://opensource.org/licenses/bsd-license.php                                            \r
                                                                                          \r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
\r
Module Name:\r
\r
  EsalServiceLib.c\r
\r
Abstract:\r
\r
--*/\r
\r
#include <Ipf/IpfDefines.h>\r
\r
BOOLEAN mLibraryInitialized = FALSE;\r
STATIC EXTENDED_SAL_BOOT_SERVICE_PROTOCOL *mEsalBootService;\r
STATIC EFI_PLABEL                         mPlabel;\r
\r
EFI_STATUS\r
EFIAPI\r
DxeSalLibConstruct (\r
//  IN EFI_HANDLE        ImageHandle,\r
//  IN EFI_SYSTEM_TABLE  *SystemTable\r
  VOID\r
  )\r
{\r
  EFI_PLABEL  *Plabel;\r
  EFI_STATUS  Status;\r
\r
  if (mLibraryInitialized == TRUE) {\r
    return EFI_SUCCESS;\r
  }\r
  mLibraryInitialized = TRUE;\r
\r
  //\r
  // The protocol contains a function pointer, which is an indirect procedure call.\r
  // An indirect procedure call goes through a plabel, and pointer to a function is\r
  // a pointer to a plabel. To implement indirect procedure calls that can work in\r
  // both physical and virtual mode, two plabels are required (one physical and one\r
  // virtual). So lets grap the physical PLABEL for the EsalEntryPoint and store it\r
  // away. We cache it in a module global, so we can register the vitrual version.\r
  //\r
  Status              = gBS->LocateProtocol (&gEfiExtendedSalBootServiceProtocolGuid, NULL, &mEsalBootService);\r
  ASSERT_EFI_ERROR (Status);\r
\r
  Plabel              = (EFI_PLABEL *) (UINTN) mEsalBootService->ExtendedSalProc;\r
\r
  mPlabel.EntryPoint  = Plabel->EntryPoint;\r
  mPlabel.GP          = Plabel->GP;\r
  SetEsalPhysicalEntryPoint (mPlabel.EntryPoint, mPlabel.GP);\r
\r
  return Status;\r
}\r
\r
VOID\r
EFIAPI\r
DxeSalVirtualNotifyEvent (\r
  IN EFI_EVENT        Event,\r
  IN VOID             *Context\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Fixup virtual address pointer of label.\r
\r
Arguments:\r
\r
  Event   - The Event that is being processed\r
  \r
  Context - Event Context\r
\r
Returns: \r
\r
  None\r
\r
--*/\r
{\r
  EfiConvertPointer (0x0, (VOID **) &mPlabel.EntryPoint);\r
  EfiConvertPointer (EFI_IPF_GP_POINTER, (VOID **) &mPlabel.GP);\r
\r
  SetEsalVirtualEntryPoint (mPlabel.EntryPoint, mPlabel.GP);\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
RegisterEsalFunction (\r
  IN  UINT64                                    FunctionId,\r
  IN  EFI_GUID                                  *ClassGuid,\r
  IN  SAL_INTERNAL_EXTENDED_SAL_PROC            Function,\r
  IN  VOID                                      *ModuleGlobal\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Register ESAL Class Function and it's asociated global.\r
  This function is boot service only!\r
\r
Arguments:\r
  FunctionId    - ID of function to register\r
  ClassGuid     - GUID of function class \r
  Function      - Function to register under ClassGuid/FunctionId pair\r
  ModuleGlobal  - Module global for Function.\r
\r
Returns: \r
  EFI_SUCCESS - If ClassGuid/FunctionId Function was registered.\r
\r
--*/\r
{\r
  DxeSalLibConstruct ();\r
  return mEsalBootService->AddExtendedSalProc (\r
                            mEsalBootService,\r
                            ClassGuid,\r
                            FunctionId,\r
                            Function,\r
                            ModuleGlobal\r
                            );\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
RegisterEsalClass (\r
  IN  EFI_GUID                                  *ClassGuid,\r
  IN  VOID                                      *ModuleGlobal,\r
  ...\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Register ESAL Class and it's asociated global.\r
  This function is boot service only!\r
\r
Arguments:\r
  ClassGuid     - GUID of function class \r
  ModuleGlobal  - Module global for Function.\r
  ...           - SAL_INTERNAL_EXTENDED_SAL_PROC and FunctionId pairs. NULL \r
                  indicates the end of the list.\r
\r
Returns: \r
  EFI_SUCCESS - All members of ClassGuid registered\r
\r
--*/\r
{\r
  VA_LIST                         Args;\r
  EFI_STATUS                      Status;\r
  SAL_INTERNAL_EXTENDED_SAL_PROC  Function;\r
  UINT64                          FunctionId;\r
  EFI_HANDLE                      NewHandle;\r
\r
  VA_START (Args, ModuleGlobal);\r
\r
  Status = EFI_SUCCESS;\r
  while (!EFI_ERROR (Status)) {\r
    Function = (SAL_INTERNAL_EXTENDED_SAL_PROC) VA_ARG (Args, SAL_INTERNAL_EXTENDED_SAL_PROC);\r
    if (Function == NULL) {\r
      break;\r
    }\r
\r
    FunctionId  = VA_ARG (Args, UINT64);\r
\r
    Status      = RegisterEsalFunction (FunctionId, ClassGuid, Function, ModuleGlobal);\r
  }\r
\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  NewHandle = NULL;\r
  return gBS->InstallProtocolInterface (\r
                &NewHandle,\r
                ClassGuid,\r
                EFI_NATIVE_INTERFACE,\r
                NULL\r
                );\r
}\r
\r
SAL_RETURN_REGS\r
EFIAPI\r
EfiCallEsalService (\r
  IN  EFI_GUID                                      *ClassGuid,\r
  IN  UINT64                                        FunctionId,\r
  IN  UINT64                                        Arg2,\r
  IN  UINT64                                        Arg3,\r
  IN  UINT64                                        Arg4,\r
  IN  UINT64                                        Arg5,\r
  IN  UINT64                                        Arg6,\r
  IN  UINT64                                        Arg7,\r
  IN  UINT64                                        Arg8\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Call module that is not linked direclty to this module. This code is IP \r
  relative and hides the binding issues of virtual or physical calling. The\r
  function that gets dispatched has extra arguments that include the registered\r
  module global and a boolean flag to indicate if the system is in virutal mode.\r
\r
Arguments:\r
  ClassGuid   - GUID of function\r
  FunctionId  - Function in ClassGuid to call\r
  Arg2        - Argument 2 ClassGuid/FunctionId defined\r
  Arg3        - Argument 3 ClassGuid/FunctionId defined\r
  Arg4        - Argument 4 ClassGuid/FunctionId defined\r
  Arg5        - Argument 5 ClassGuid/FunctionId defined\r
  Arg6        - Argument 6 ClassGuid/FunctionId defined\r
  Arg7        - Argument 7 ClassGuid/FunctionId defined\r
  Arg8        - Argument 8 ClassGuid/FunctionId defined\r
\r
Returns: \r
  Status of ClassGuid/FuncitonId\r
\r
--*/\r
{\r
  SAL_RETURN_REGS       ReturnReg;\r
  SAL_EXTENDED_SAL_PROC EsalProc;\r
\r
  DxeSalLibConstruct ();\r
  ReturnReg = GetEsalEntryPoint ();\r
  if (ReturnReg.Status != EFI_SAL_SUCCESS) {\r
    return ReturnReg;\r
  }\r
\r
  if (ReturnReg.r11 & PSR_IT_MASK) {\r
    //\r
    // Virtual mode plabel to entry point\r
    //\r
    EsalProc = (SAL_EXTENDED_SAL_PROC) ReturnReg.r10;\r
  } else {\r
    //\r
    // Physical mode plabel to entry point\r
    //\r
    EsalProc = (SAL_EXTENDED_SAL_PROC) ReturnReg.r9;\r
  }\r
\r
  return EsalProc (\r
          ClassGuid,\r
          FunctionId,\r
          Arg2,\r
          Arg3,\r
          Arg4,\r
          Arg5,\r
          Arg6,\r
          Arg7,\r
          Arg8\r
          );\r
}\r