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 ArmPlatformTrustzoneSupported(VOID) {
  33   // There is no Trustzone controllers (TZPC & TZASC) and no Secure Memory on RTSM
  34         return FALSE;
  35 }
  36
  37 /**
  38   Initialize the Secure peripherals and memory regions
  39
  40   If Trustzone is supported by your platform then this function makes the required initialization
  41   of the secure peripherals and memory regions.
  42
  43 **/
  44 VOID ArmPlatformTrustzoneInit(VOID) {
  45         ASSERT(FALSE);
  46 }
  47
  48 /**
  49   Remap the memory at 0x0
  50
  51   Some platform requires or gives the ability to remap the memory at the address 0x0.
  52   This function can do nothing if this feature is not relevant to your platform.
  53
  54 **/
  55 VOID ArmPlatformBootRemapping(VOID) {
  56   // Disable memory remapping and return to normal mapping
  57         MmioOr32 (ARM_EB_SYSCTRL, BIT8); //EB_SP810_CTRL_BASE
  58 }
  59
  60 /**
  61   Return the current Boot Mode
  62
  63   This function returns the boot reason on the platform
  64
  65 **/
  66 EFI_BOOT_MODE
  67 ArmPlatformGetBootMode (
  68   VOID
  69   )
  70 {
  71   return BOOT_WITH_FULL_CONFIGURATION;
  72 }
  73
  74 /**
  75   Initialize controllers that must setup at the early stage
  76
  77   Some peripherals must be initialized in Secure World.
  78   For example, some L2x0 requires to be initialized in Secure World
  79
  80 **/
  81 VOID
  82 ArmPlatformInitialize (
  83   VOID
  84   ) {
  85   // Do nothing yet
  86 }
  87
  88 /**
  89   Initialize the system (or sometimes called permanent) memory
  90
  91   This memory is generally represented by the DRAM.
  92
  93 **/
  94 VOID ArmPlatformInitializeSystemMemory(VOID) {
  95     // We do not need to initialize the System Memory on RTSM
  96 }