UnixPkg/UnixAutoScanPei/UnixAutoScan.c

   1 /*++
   2
   3 Copyright (c) 2006 - 2008, Intel Corporation
   4 All rights reserved. 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 Module Name:
  13   UnixAutoscan.c
  14
  15 Abstract:
  16   This PEIM to abstract memory auto-scan in an Unix environment.
  17
  18 Revision History
  19
  20 --*/
  21
  22 #include "PiPei.h"
  23 #include <Ppi/UnixAutoScan.h>
  24 #include <Ppi/MemoryDiscovered.h>
  25
  26 #include <Library/DebugLib.h>
  27 #include <Library/PeimEntryPoint.h>
  28 #include <Library/BaseLib.h>
  29 #include <Library/BaseMemoryLib.h>
  30 #include <Library/HobLib.h>
  31 #include <Library/PeiServicesLib.h>
  32 #include <Library/PeiServicesTablePointerLib.h>
  33
  34 EFI_STATUS
  35 EFIAPI
  36 PeimInitializeUnixAutoScan (
  37   IN       EFI_PEI_FILE_HANDLE       FileHandle,
  38   IN CONST EFI_PEI_SERVICES          **PeiServices
  39   )
  40 /*++
  41
  42 Routine Description:
  43   Perform a call-back into the SEC simulator to get a memory value
  44
  45 Arguments:
  46   FfsHeader   - General purpose data available to every PEIM
  47   PeiServices - General purpose services available to every PEIM.
  48
  49 Returns:
  50   None
  51
  52 --*/
  53 {
  54   EFI_STATUS                  Status;
  55   EFI_PEI_PPI_DESCRIPTOR      *PpiDescriptor;
  56   PEI_UNIX_AUTOSCAN_PPI      *PeiUnixService;
  57   UINT64                      MemorySize;
  58   EFI_PHYSICAL_ADDRESS        MemoryBase;
  59   UINTN                       Index;
  60   EFI_RESOURCE_ATTRIBUTE_TYPE Attributes;
  61
  62
  63   DEBUG ((EFI_D_ERROR, "Unix Autoscan PEIM Loaded\n"));
  64
  65   //
  66   // Get the PEI UNIX Autoscan PPI
  67   //
  68   Status = PeiServicesLocatePpi (
  69              &gPeiUnixAutoScanPpiGuid, // GUID
  70              0,                      // INSTANCE
  71              &PpiDescriptor,         // EFI_PEI_PPI_DESCRIPTOR
  72              (VOID **)&PeiUnixService           // PPI
  73              );
  74   ASSERT_EFI_ERROR (Status);
  75
  76   Index = 0;
  77   do {
  78     Status = PeiUnixService->UnixAutoScan (Index, &MemoryBase, &MemorySize);
  79     if (!EFI_ERROR (Status)) {
  80       Attributes =
  81         (
  82           EFI_RESOURCE_ATTRIBUTE_PRESENT |
  83           EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
  84           EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
  85           EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
  86           EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
  87           EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE
  88         );
  89
  90       if (Index == 0) {
  91         //
  92         // Register the memory with the PEI Core
  93         //
  94         Status = PeiServicesInstallPeiMemory (MemoryBase, MemorySize);
  95         ASSERT_EFI_ERROR (Status);
  96
  97         Attributes |= EFI_RESOURCE_ATTRIBUTE_TESTED;
  98       }
  99
 100       BuildResourceDescriptorHob (
 101         EFI_RESOURCE_SYSTEM_MEMORY,
 102         Attributes,
 103         MemoryBase,
 104         MemorySize
 105         );
 106     }
 107     Index++;
 108   } while (!EFI_ERROR (Status));
 109
 110   //
 111   // Build the CPU hob with 36-bit addressing and 16-bits of IO space.
 112   //
 113   BuildCpuHob (36, 16);
 114
 115   return Status;
 116 }