IntelFsp2Pkg/FspSecCore/SecFspApiChk.c

   1 /** @file
   2
   3   Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR>
   4   SPDX-License-Identifier: BSD-2-Clause-Patent
   5
   6 **/
   7
   8 #include "SecFsp.h"
   9
  10
  11 /**
  12   This function check the FSP API calling condition.
  13
  14   @param[in]  ApiIdx           Internal index of the FSP API.
  15   @param[in]  ApiParam         Parameter of the FSP API.
  16
  17 **/
  18 EFI_STATUS
  19 EFIAPI
  20 FspApiCallingCheck (
  21   IN UINT8     ApiIdx,
  22   IN VOID     *ApiParam
  23   )
  24 {
  25   EFI_STATUS                Status;
  26   FSP_GLOBAL_DATA           *FspData;
  27
  28   Status = EFI_SUCCESS;
  29   FspData = GetFspGlobalDataPointer ();
  30
  31   if (ApiIdx == NotifyPhaseApiIndex) {
  32     //
  33     // NotifyPhase check
  34     //
  35     if ((FspData == NULL) || ((UINT32)FspData == 0xFFFFFFFF)) {
  36       Status = EFI_UNSUPPORTED;
  37     } else {
  38       if (FspData->Signature != FSP_GLOBAL_DATA_SIGNATURE) {
  39         Status = EFI_UNSUPPORTED;
  40       }
  41     }
  42   } else if (ApiIdx == FspMemoryInitApiIndex) {
  43     //
  44     // FspMemoryInit check
  45     //
  46     if ((UINT32)FspData != 0xFFFFFFFF) {
  47       Status = EFI_UNSUPPORTED;
  48     } else if (EFI_ERROR (FspUpdSignatureCheck (ApiIdx, ApiParam))) {
  49       Status = EFI_INVALID_PARAMETER;
  50     }
  51   } else if (ApiIdx == TempRamExitApiIndex) {
  52     //
  53     // TempRamExit check
  54     //
  55     if ((FspData == NULL) || ((UINT32)FspData == 0xFFFFFFFF)) {
  56       Status = EFI_UNSUPPORTED;
  57     } else {
  58       if (FspData->Signature != FSP_GLOBAL_DATA_SIGNATURE) {
  59         Status = EFI_UNSUPPORTED;
  60       }
  61     }
  62   } else if (ApiIdx == FspSiliconInitApiIndex) {
  63     //
  64     // FspSiliconInit check
  65     //
  66     if ((FspData == NULL) || ((UINT32)FspData == 0xFFFFFFFF)) {
  67       Status = EFI_UNSUPPORTED;
  68     } else {
  69       if (FspData->Signature != FSP_GLOBAL_DATA_SIGNATURE) {
  70         Status = EFI_UNSUPPORTED;
  71       } else if (EFI_ERROR (FspUpdSignatureCheck (ApiIdx, ApiParam))) {
  72         Status = EFI_INVALID_PARAMETER;
  73       }
  74     }
  75   } else {
  76     Status = EFI_UNSUPPORTED;
  77   }
  78
  79   if (!EFI_ERROR (Status)) {
  80     if ((ApiIdx != FspMemoryInitApiIndex)) {
  81       //
  82       // For FspMemoryInit, the global data is not valid yet
  83       // The API index will be updated by SecCore after the global data
  84       // is initialized
  85       //
  86       SetFspApiCallingIndex (ApiIdx);
  87     }
  88   }
  89
  90   return Status;
  91 }