IntelFsp2Pkg/FspSecCore/SecFspApiChk.c

   1 /** @file
   2
   3   Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
   4   This program and the accompanying materials
   5   are licensed and made available under the terms and conditions of the BSD License
   6   which accompanies this distribution.  The full text of the license may be found at
   7   http://opensource.org/licenses/bsd-license.php.
   8
   9   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 **/
  13
  14 #include "SecFsp.h"
  15
  16
  17 /**
  18   This function check the FSP API calling condition.
  19
  20   @param[in]  ApiIdx           Internal index of the FSP API.
  21   @param[in]  ApiParam         Parameter of the FSP API.
  22
  23 **/
  24 EFI_STATUS
  25 EFIAPI
  26 FspApiCallingCheck (
  27   IN UINT8     ApiIdx,
  28   IN VOID     *ApiParam
  29   )
  30 {
  31   EFI_STATUS                Status;
  32   FSP_GLOBAL_DATA           *FspData;
  33
  34   Status = EFI_SUCCESS;
  35   FspData = GetFspGlobalDataPointer ();
  36
  37   if (ApiIdx == NotifyPhaseApiIndex) {
  38     //
  39     // NotifyPhase check
  40     //
  41     if ((FspData == NULL) || ((UINT32)FspData == 0xFFFFFFFF)) {
  42       Status = EFI_UNSUPPORTED;
  43     } else {
  44       if (FspData->Signature != FSP_GLOBAL_DATA_SIGNATURE) {
  45         Status = EFI_UNSUPPORTED;
  46       }
  47     }
  48   } else if (ApiIdx == FspMemoryInitApiIndex) {
  49     //
  50     // FspMemoryInit check
  51     //
  52     if ((UINT32)FspData != 0xFFFFFFFF) {
  53       Status = EFI_UNSUPPORTED;
  54     } else if (EFI_ERROR (FspUpdSignatureCheck (ApiIdx, ApiParam))) {
  55       Status = EFI_INVALID_PARAMETER;
  56     }
  57   } else if (ApiIdx == TempRamExitApiIndex) {
  58     //
  59     // TempRamExit check
  60     //
  61     if ((FspData == NULL) || ((UINT32)FspData == 0xFFFFFFFF)) {
  62       Status = EFI_UNSUPPORTED;
  63     } else {
  64       if (FspData->Signature != FSP_GLOBAL_DATA_SIGNATURE) {
  65         Status = EFI_UNSUPPORTED;
  66       }
  67     }
  68   } else if (ApiIdx == FspSiliconInitApiIndex) {
  69     //
  70     // FspSiliconInit check
  71     //
  72     if ((FspData == NULL) || ((UINT32)FspData == 0xFFFFFFFF)) {
  73       Status = EFI_UNSUPPORTED;
  74     } else {
  75       if (FspData->Signature != FSP_GLOBAL_DATA_SIGNATURE) {
  76         Status = EFI_UNSUPPORTED;
  77       } else if (EFI_ERROR (FspUpdSignatureCheck (ApiIdx, ApiParam))) {
  78         Status = EFI_INVALID_PARAMETER;
  79       }
  80     }
  81   } else {
  82     Status = EFI_UNSUPPORTED;
  83   }
  84
  85   if (!EFI_ERROR (Status)) {
  86     if ((ApiIdx != FspMemoryInitApiIndex)) {
  87       //
  88       // For FspMemoryInit, the global data is not valid yet
  89       // The API index will be updated by SecCore after the global data
  90       // is initialized
  91       //
  92       SetFspApiCallingIndex (ApiIdx);
  93     }
  94   }
  95
  96   return Status;
  97 }