BeagleBoardPkg/Library/BeagleBoardLib/BeagleBoard.c

   1 /** @file
   2 *
   3 *  Copyright (c) 2011, ARM Limited. All rights reserved.
   4 *
   5 *  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 <Library/IoLib.h>
  16 #include <Library/ArmPlatformLib.h>
  17 #include <Library/DebugLib.h>
  18 #include <Library/PcdLib.h>
  19
  20 VOID
  21 PadConfiguration (
  22   VOID
  23   );
  24
  25 VOID
  26 ClockInit (
  27   VOID
  28   );
  29
  30 /**
  31   Return if Trustzone is supported by your platform
  32
  33   A non-zero value must be returned if you want to support a Secure World on your platform.
  34   ArmPlatformTrustzoneInit() will later set up the secure regions.
  35   This function can return 0 even if Trustzone is supported by your processor. In this case,
  36   the platform will continue to run in Secure World.
  37
  38   @return   A non-zero value if Trustzone supported.
  39
  40 **/
  41 UINTN
  42 ArmPlatformTrustzoneSupported (
  43   VOID
  44   )
  45 {
  46   // The BeagleBoard starts in Normal World (Non Secure World)
  47         return FALSE;
  48 }
  49
  50 /**
  51   Initialize the Secure peripherals and memory regions
  52
  53   If Trustzone is supported by your platform then this function makes the required initialization
  54   of the secure peripherals and memory regions.
  55
  56 **/
  57 VOID
  58 ArmPlatformTrustzoneInit (
  59   VOID
  60   )
  61 {
  62         ASSERT(FALSE);
  63 }
  64
  65 /**
  66   Remap the memory at 0x0
  67
  68   Some platform requires or gives the ability to remap the memory at the address 0x0.
  69   This function can do nothing if this feature is not relevant to your platform.
  70
  71 **/
  72 VOID
  73 ArmPlatformBootRemapping (
  74   VOID
  75   )
  76 {
  77   // Do nothing for the BeagleBoard
  78 }
  79
  80 /**
  81   Return the current Boot Mode
  82
  83   This function returns the boot reason on the platform
  84
  85 **/
  86 EFI_BOOT_MODE
  87 ArmPlatformGetBootMode (
  88   VOID
  89   )
  90 {
  91   return BOOT_WITH_FULL_CONFIGURATION;
  92 }
  93
  94 /**
  95   Initialize controllers that must setup at the early stage
  96
  97   Some peripherals must be initialized in Secure World.
  98   For example, some L2x0 requires to be initialized in Secure World
  99
 100 **/
 101 VOID
 102 ArmPlatformNormalInitialize (
 103   VOID
 104   ) {
 105   //Set up Pin muxing.
 106   PadConfiguration ();
 107
 108   // Set up system clocking
 109   ClockInit ();
 110 }
 111
 112 /**
 113   Initialize the system (or sometimes called permanent) memory
 114
 115   This memory is generally represented by the DRAM.
 116
 117 **/
 118 VOID
 119 ArmPlatformInitializeSystemMemory (
 120   VOID
 121   )
 122 {
 123   // We do not need to initialize the System Memory on RTSM
 124 }