BeagleBoardPkg/Library/BeagleBoardSystemLib/BeagleBoardSystemLib.c

   1 /** @file
   2
   3   Copyright (c) 2008-2009, Apple Inc. All rights reserved.
   4
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <Uefi.h>
  16
  17 #include <Library/ArmLib.h>
  18 #include <Library/CacheMaintenanceLib.h>
  19 #include <Library/MemoryAllocationLib.h>
  20 #include <Library/IoLib.h>
  21 #include <Library/PcdLib.h>
  22 #include <Library/DebugLib.h>
  23 #include <Library/UefiBootServicesTableLib.h>
  24 #include <Library/BeagleBoardSystemLib.h>
  25
  26 #include <Omap3530/Omap3530.h>
  27
  28 VOID
  29 ResetSystem (
  30   IN EFI_RESET_TYPE   ResetType
  31   )
  32 {
  33   switch (ResetType) {
  34     case EfiResetWarm:
  35       //Perform warm reset of the system.
  36       GoLittleEndian(PcdGet32(PcdFlashFvMainBase));
  37       break;
  38     case EfiResetCold:
  39     case EfiResetShutdown:
  40     default:
  41       //Perform cold reset of the system.
  42       MmioOr32(PRM_RSTCTRL, RST_DPLL3);
  43       while ((MmioRead32(PRM_RSTST) & GLOBAL_COLD_RST) != 0x1);
  44       break;
  45   }
  46
  47   //Should never come here.
  48   ASSERT(FALSE);
  49 }
  50
  51 VOID
  52 ShutdownEfi (
  53   VOID
  54   )
  55 {
  56   EFI_STATUS              Status;
  57   UINTN                   MemoryMapSize;
  58   EFI_MEMORY_DESCRIPTOR   *MemoryMap;
  59   UINTN                   MapKey;
  60   UINTN                   DescriptorSize;
  61   UINTN                   DescriptorVersion;
  62   UINTN                   Pages;
  63
  64   MemoryMap = NULL;
  65   MemoryMapSize = 0;
  66   do {
  67     Status = gBS->GetMemoryMap (
  68                     &MemoryMapSize,
  69                     MemoryMap,
  70                     &MapKey,
  71                     &DescriptorSize,
  72                     &DescriptorVersion
  73                     );
  74     if (Status == EFI_BUFFER_TOO_SMALL) {
  75
  76       Pages = EFI_SIZE_TO_PAGES (MemoryMapSize) + 1;
  77       MemoryMap = AllocatePages (Pages);
  78
  79       //
  80       // Get System MemoryMap
  81       //
  82       Status = gBS->GetMemoryMap (
  83                       &MemoryMapSize,
  84                       MemoryMap,
  85                       &MapKey,
  86                       &DescriptorSize,
  87                       &DescriptorVersion
  88                       );
  89       // Don't do anything between the GetMemoryMap() and ExitBootServices()
  90       if (!EFI_ERROR (Status)) {
  91         Status = gBS->ExitBootServices (gImageHandle, MapKey);
  92         if (EFI_ERROR (Status)) {
  93           FreePages (MemoryMap, Pages);
  94           MemoryMap = NULL;
  95           MemoryMapSize = 0;
  96         }
  97       }
  98     }
  99   } while (EFI_ERROR (Status));
 100
 101   //Clean and invalidate caches.
 102   WriteBackInvalidateDataCache();
 103   InvalidateInstructionCache();
 104
 105   //Turning off Caches and MMU
 106   ArmDisableDataCache();
 107   ArmDisableInstructionCache();
 108   ArmDisableMmu();
 109 }
 110