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
  20 #include <Drivers/PL341Dmc.h>
  21 #include <Drivers/SP804Timer.h>
  22
  23 /**
  24   Return if Trustzone is supported by your platform
  25
  26   A non-zero value must be returned if you want to support a Secure World on your platform.
  27   ArmPlatformTrustzoneInit() will later set up the secure regions.
  28   This function can return 0 even if Trustzone is supported by your processor. In this case,
  29   the platform will continue to run in Secure World.
  30
  31   @return   A non-zero value if Trustzone supported.
  32
  33 **/
  34 UINTN
  35 ArmPlatformTrustzoneSupported (
  36   VOID
  37   )
  38 {
  39   // There is no Trustzone controllers (TZPC & TZASC) and no Secure Memory on RTSM
  40   return FALSE;
  41 }
  42
  43 /**
  44   Initialize the Secure peripherals and memory regions
  45
  46   If Trustzone is supported by your platform then this function makes the required initialization
  47   of the secure peripherals and memory regions.
  48
  49 **/
  50 VOID
  51 ArmPlatformTrustzoneInit (
  52   VOID
  53   )
  54 {
  55   ASSERT(FALSE);
  56 }
  57
  58 /**
  59   Remap the memory at 0x0
  60
  61   Some platform requires or gives the ability to remap the memory at the address 0x0.
  62   This function can do nothing if this feature is not relevant to your platform.
  63
  64 **/
  65 VOID
  66 ArmPlatformBootRemapping (
  67   VOID
  68   )
  69 {
  70   // Disable memory remapping and return to normal mapping
  71   MmioOr32 (ARM_EB_SYSCTRL, BIT8); //EB_SP810_CTRL_BASE
  72 }
  73
  74 /**
  75   Return the current Boot Mode
  76
  77   This function returns the boot reason on the platform
  78
  79 **/
  80 EFI_BOOT_MODE
  81 ArmPlatformGetBootMode (
  82   VOID
  83   )
  84 {
  85   return BOOT_WITH_FULL_CONFIGURATION;
  86 }
  87
  88 /**
  89   Initialize controllers that must setup at the early stage
  90
  91   Some peripherals must be initialized in Secure World.
  92   For example, some L2x0 requires to be initialized in Secure World
  93
  94 **/
  95 VOID
  96 ArmPlatformSecInitialize (
  97   VOID
  98   ) {
  99   // Do nothing yet
 100 }
 101
 102 /**
 103   Initialize controllers that must setup in the normal world
 104
 105   This function is called by the ArmPlatformPkg/Pei or ArmPlatformPkg/Pei/PlatformPeim
 106   in the PEI phase.
 107
 108 **/
 109 VOID
 110 ArmPlatformNormalInitialize (
 111   VOID
 112   )
 113 {
 114   // Configure periodic timer (TIMER0) for 1MHz operation
 115   MmioOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, SP810_SYS_CTRL_TIMER0_TIMCLK);
 116   // Configure 1MHz clock
 117   MmioOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, SP810_SYS_CTRL_TIMER1_TIMCLK);
 118   // configure SP810 to use 1MHz clock and disable
 119   MmioAndThenOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER2_EN, SP810_SYS_CTRL_TIMER2_TIMCLK);
 120   // Configure SP810 to use 1MHz clock and disable
 121   MmioAndThenOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER3_EN, SP810_SYS_CTRL_TIMER3_TIMCLK);
 122 }
 123
 124 /**
 125   Initialize the system (or sometimes called permanent) memory
 126
 127   This memory is generally represented by the DRAM.
 128
 129 **/
 130 VOID
 131 ArmPlatformInitializeSystemMemory (
 132   VOID
 133   )
 134 {
 135   // We do not need to initialize the System Memory on RTSM
 136 }