ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEb.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 #include <Drivers/PL341Dmc.h>
  20
  21 /**
  22   Return if Trustzone is supported by your platform
  23
  24   A non-zero value must be returned if you want to support a Secure World on your platform.
  25   ArmPlatformTrustzoneInit() will later set up the secure regions.
  26   This function can return 0 even if Trustzone is supported by your processor. In this case,
  27   the platform will continue to run in Secure World.
  28
  29   @return   A non-zero value if Trustzone supported.
  30
  31 **/
  32 UINTN
  33 ArmPlatformTrustzoneSupported (
  34   VOID
  35   )
  36 {
  37   // There is no Trustzone controllers (TZPC & TZASC) and no Secure Memory on RTSM
  38   return FALSE;
  39 }
  40
  41 /**
  42   Initialize the Secure peripherals and memory regions
  43
  44   If Trustzone is supported by your platform then this function makes the required initialization
  45   of the secure peripherals and memory regions.
  46
  47 **/
  48 VOID
  49 ArmPlatformTrustzoneInit (
  50   VOID
  51   )
  52 {
  53   ASSERT(FALSE);
  54 }
  55
  56 /**
  57   Remap the memory at 0x0
  58
  59   Some platform requires or gives the ability to remap the memory at the address 0x0.
  60   This function can do nothing if this feature is not relevant to your platform.
  61
  62 **/
  63 VOID
  64 ArmPlatformBootRemapping (
  65   VOID
  66   )
  67 {
  68   // Disable memory remapping and return to normal mapping
  69   MmioOr32 (ARM_EB_SYSCTRL, BIT8); //EB_SP810_CTRL_BASE
  70 }
  71
  72 /**
  73   Return the current Boot Mode
  74
  75   This function returns the boot reason on the platform
  76
  77 **/
  78 EFI_BOOT_MODE
  79 ArmPlatformGetBootMode (
  80   VOID
  81   )
  82 {
  83   return BOOT_WITH_FULL_CONFIGURATION;
  84 }
  85
  86 /**
  87   Initialize controllers that must setup at the early stage
  88
  89   Some peripherals must be initialized in Secure World.
  90   For example, some L2x0 requires to be initialized in Secure World
  91
  92 **/
  93 VOID
  94 ArmPlatformSecInitialize (
  95   VOID
  96   ) {
  97   // Do nothing yet
  98 }
  99
 100 /**
 101   Initialize controllers that must setup in the normal world
 102
 103   This function is called by the ArmPlatformPkg/Pei or ArmPlatformPkg/Pei/PlatformPeim
 104   in the PEI phase.
 105
 106 **/
 107 VOID
 108 ArmPlatformNormalInitialize (
 109   VOID
 110   )
 111 {
 112   // Nothing to do here
 113 }
 114
 115 /**
 116   Initialize the system (or sometimes called permanent) memory
 117
 118   This memory is generally represented by the DRAM.
 119
 120 **/
 121 VOID
 122 ArmPlatformInitializeSystemMemory (
 123   VOID
 124   )
 125 {
 126   // We do not need to initialize the System Memory on RTSM
 127 }