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 #include <BeagleBoard.h>
  22
  23 VOID
  24 PadConfiguration (
  25   BEAGLEBOARD_REVISION Revision
  26   );
  27
  28 VOID
  29 ClockInit (
  30   VOID
  31   );
  32
  33 /**
  34   Detect board revision
  35
  36   @return Board revision
  37 **/
  38 BEAGLEBOARD_REVISION
  39 BeagleBoardGetRevision (
  40   VOID
  41   )
  42 {
  43   UINT32 OldPinDir;
  44   UINT32 Revision;
  45
  46   // Read GPIO 171, 172, 173
  47   OldPinDir = MmioRead32 (GPIO6_BASE + GPIO_OE);
  48   MmioWrite32(GPIO6_BASE + GPIO_OE, (OldPinDir | BIT11 | BIT12 | BIT13));
  49   Revision = MmioRead32 (GPIO6_BASE + GPIO_DATAIN);
  50
  51   // Restore I/O settings
  52   MmioWrite32 (GPIO6_BASE + GPIO_OE, OldPinDir);
  53
  54   return (BEAGLEBOARD_REVISION)((Revision >> 11) & 0x7);
  55 }
  56
  57 /**
  58   Return if Trustzone is supported by your platform
  59
  60   A non-zero value must be returned if you want to support a Secure World on your platform.
  61   ArmPlatformTrustzoneInit() will later set up the secure regions.
  62   This function can return 0 even if Trustzone is supported by your processor. In this case,
  63   the platform will continue to run in Secure World.
  64
  65   @return   A non-zero value if Trustzone supported.
  66
  67 **/
  68 UINTN
  69 ArmPlatformTrustzoneSupported (
  70   VOID
  71   )
  72 {
  73   // The BeagleBoard starts in Normal World (Non Secure World)
  74         return FALSE;
  75 }
  76
  77 /**
  78   Initialize the Secure peripherals and memory regions
  79
  80   If Trustzone is supported by your platform then this function makes the required initialization
  81   of the secure peripherals and memory regions.
  82
  83 **/
  84 VOID
  85 ArmPlatformTrustzoneInit (
  86   VOID
  87   )
  88 {
  89         ASSERT(FALSE);
  90 }
  91
  92 /**
  93   Remap the memory at 0x0
  94
  95   Some platform requires or gives the ability to remap the memory at the address 0x0.
  96   This function can do nothing if this feature is not relevant to your platform.
  97
  98 **/
  99 VOID
 100 ArmPlatformBootRemapping (
 101   VOID
 102   )
 103 {
 104   // Do nothing for the BeagleBoard
 105 }
 106
 107 /**
 108   Return the current Boot Mode
 109
 110   This function returns the boot reason on the platform
 111
 112 **/
 113 EFI_BOOT_MODE
 114 ArmPlatformGetBootMode (
 115   VOID
 116   )
 117 {
 118   return BOOT_WITH_FULL_CONFIGURATION;
 119 }
 120
 121 /**
 122   Initialize controllers that must setup at the early stage
 123
 124   Some peripherals must be initialized in Secure World.
 125   For example, some L2x0 requires to be initialized in Secure World
 126
 127 **/
 128 VOID
 129 ArmPlatformNormalInitialize (
 130   VOID
 131   )
 132 {
 133   BEAGLEBOARD_REVISION Revision;
 134
 135   Revision = BeagleBoardGetRevision();
 136
 137   // Set up Pin muxing.
 138   PadConfiguration (Revision);
 139
 140   // Set up system clocking
 141   ClockInit ();
 142
 143   // Turn off the functional clock for Timer 3
 144   MmioAnd32 (CM_FCLKEN_PER, 0xFFFFFFFF ^ CM_ICLKEN_PER_EN_GPT3_ENABLE );
 145   ArmDataSyncronizationBarrier ();
 146
 147   // Clear IRQs
 148   MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWIRQAGR);
 149   ArmDataSyncronizationBarrier ();
 150 }
 151
 152 /**
 153   Initialize the system (or sometimes called permanent) memory
 154
 155   This memory is generally represented by the DRAM.
 156
 157 **/
 158 VOID
 159 ArmPlatformInitializeSystemMemory (
 160   VOID
 161   )
 162 {
 163   // We do not need to initialize the System Memory on RTSM
 164 }