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      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 }
     98