BeagleBoardPkg/Library/BeagleBoardLib/BeagleBoard.c

   1 /** @file
   2 *
   3 *  Copyright (c) 2011-2012, 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   Remap the memory at 0x0
  79
  80   Some platform requires or gives the ability to remap the memory at the address 0x0.
  81   This function can do nothing if this feature is not relevant to your platform.
  82
  83 **/
  84 VOID
  85 ArmPlatformBootRemapping (
  86   VOID
  87   )
  88 {
  89   // Do nothing for the BeagleBoard
  90 }
  91
  92 /**
  93   Return the current Boot Mode
  94
  95   This function returns the boot reason on the platform
  96
  97 **/
  98 EFI_BOOT_MODE
  99 ArmPlatformGetBootMode (
 100   VOID
 101   )
 102 {
 103   return BOOT_WITH_FULL_CONFIGURATION;
 104 }
 105
 106 /**
 107   Initialize controllers that must setup at the early stage
 108
 109   Some peripherals must be initialized in Secure World.
 110   For example, some L2x0 requires to be initialized in Secure World
 111
 112 **/
 113 RETURN_STATUS
 114 ArmPlatformInitialize (
 115   IN  UINTN                     MpId
 116   )
 117 {
 118   BEAGLEBOARD_REVISION Revision;
 119
 120   Revision = BeagleBoardGetRevision();
 121
 122   // Set up Pin muxing.
 123   PadConfiguration (Revision);
 124
 125   // Set up system clocking
 126   ClockInit ();
 127
 128   // Turn off the functional clock for Timer 3
 129   MmioAnd32 (CM_FCLKEN_PER, 0xFFFFFFFF ^ CM_ICLKEN_PER_EN_GPT3_ENABLE );
 130   ArmDataSyncronizationBarrier ();
 131
 132   // Clear IRQs
 133   MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWIRQAGR);
 134   ArmDataSyncronizationBarrier ();
 135
 136   return RETURN_SUCCESS;
 137 }
 138
 139 /**
 140   Initialize the system (or sometimes called permanent) memory
 141
 142   This memory is generally represented by the DRAM.
 143
 144 **/
 145 VOID
 146 ArmPlatformInitializeSystemMemory (
 147   VOID
 148   )
 149 {
 150   // We do not need to initialize the System Memory on RTSM
 151 }