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 #include <Omap3530/Omap3530.h>
  21
  22 VOID
  23 PadConfiguration (
  24   VOID
  25   );
  26
  27 VOID
  28 ClockInit (
  29   VOID
  30   );
  31
  32 /**
  33   Return if Trustzone is supported by your platform
  34
  35   A non-zero value must be returned if you want to support a Secure World on your platform.
  36   ArmPlatformTrustzoneInit() will later set up the secure regions.
  37   This function can return 0 even if Trustzone is supported by your processor. In this case,
  38   the platform will continue to run in Secure World.
  39
  40   @return   A non-zero value if Trustzone supported.
  41
  42 **/
  43 UINTN
  44 ArmPlatformTrustzoneSupported (
  45   VOID
  46   )
  47 {
  48   // The BeagleBoard starts in Normal World (Non Secure World)
  49         return FALSE;
  50 }
  51
  52 /**
  53   Initialize the Secure peripherals and memory regions
  54
  55   If Trustzone is supported by your platform then this function makes the required initialization
  56   of the secure peripherals and memory regions.
  57
  58 **/
  59 VOID
  60 ArmPlatformTrustzoneInit (
  61   VOID
  62   )
  63 {
  64         ASSERT(FALSE);
  65 }
  66
  67 /**
  68   Remap the memory at 0x0
  69
  70   Some platform requires or gives the ability to remap the memory at the address 0x0.
  71   This function can do nothing if this feature is not relevant to your platform.
  72
  73 **/
  74 VOID
  75 ArmPlatformBootRemapping (
  76   VOID
  77   )
  78 {
  79   // Do nothing for the BeagleBoard
  80 }
  81
  82 /**
  83   Return the current Boot Mode
  84
  85   This function returns the boot reason on the platform
  86
  87 **/
  88 EFI_BOOT_MODE
  89 ArmPlatformGetBootMode (
  90   VOID
  91   )
  92 {
  93   return BOOT_WITH_FULL_CONFIGURATION;
  94 }
  95
  96 /**
  97   Initialize controllers that must setup at the early stage
  98
  99   Some peripherals must be initialized in Secure World.
 100   For example, some L2x0 requires to be initialized in Secure World
 101
 102 **/
 103 VOID
 104 ArmPlatformNormalInitialize (
 105   VOID
 106   )
 107 {
 108   //Set up Pin muxing.
 109   PadConfiguration ();
 110
 111   // Set up system clocking
 112   ClockInit ();
 113
 114   // Turn off the functional clock for Timer 3
 115   MmioAnd32 (CM_FCLKEN_PER, 0xFFFFFFFF ^ CM_ICLKEN_PER_EN_GPT3_ENABLE );
 116   ArmDataSyncronizationBarrier ();
 117
 118   // Clear IRQs
 119   MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWIRQAGR);
 120   ArmDataSyncronizationBarrier ();
 121 }
 122
 123 /**
 124   Initialize the system (or sometimes called permanent) memory
 125
 126   This memory is generally represented by the DRAM.
 127
 128 **/
 129 VOID
 130 ArmPlatformInitializeSystemMemory (
 131   VOID
 132   )
 133 {
 134   // We do not need to initialize the System Memory on RTSM
 135 }