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 #include <ArmPlatform.h>
  24
  25 /**
  26   Return if Trustzone is supported by your platform
  27
  28   A non-zero value must be returned if you want to support a Secure World on your platform.
  29   ArmPlatformTrustzoneInit() will later set up the secure regions.
  30   This function can return 0 even if Trustzone is supported by your processor. In this case,
  31   the platform will continue to run in Secure World.
  32
  33   @return   A non-zero value if Trustzone supported.
  34
  35 **/
  36 UINTN
  37 ArmPlatformTrustzoneSupported (
  38   VOID
  39   )
  40 {
  41   // There is no Trustzone controllers (TZPC & TZASC) and no Secure Memory on RTSM
  42   return FALSE;
  43 }
  44
  45 /**
  46   Initialize the Secure peripherals and memory regions
  47
  48   If Trustzone is supported by your platform then this function makes the required initialization
  49   of the secure peripherals and memory regions.
  50
  51 **/
  52 VOID
  53 ArmPlatformTrustzoneInit (
  54   VOID
  55   )
  56 {
  57   ASSERT(FALSE);
  58 }
  59
  60 /**
  61   Remap the memory at 0x0
  62
  63   Some platform requires or gives the ability to remap the memory at the address 0x0.
  64   This function can do nothing if this feature is not relevant to your platform.
  65
  66 **/
  67 VOID
  68 ArmPlatformBootRemapping (
  69   VOID
  70   )
  71 {
  72   // Disable memory remapping and return to normal mapping
  73   MmioOr32 (ARM_EB_SYSCTRL, BIT8); //EB_SP810_CTRL_BASE
  74 }
  75
  76 /**
  77   Return the current Boot Mode
  78
  79   This function returns the boot reason on the platform
  80
  81 **/
  82 EFI_BOOT_MODE
  83 ArmPlatformGetBootMode (
  84   VOID
  85   )
  86 {
  87   return BOOT_WITH_FULL_CONFIGURATION;
  88 }
  89
  90 /**
  91   Initialize controllers that must setup at the early stage
  92
  93   Some peripherals must be initialized in Secure World.
  94   For example, some L2x0 requires to be initialized in Secure World
  95
  96 **/
  97 VOID
  98 ArmPlatformSecInitialize (
  99   VOID
 100   ) {
 101   // Do nothing yet
 102 }
 103
 104 /**
 105   Initialize controllers that must setup in the normal world
 106
 107   This function is called by the ArmPlatformPkg/PrePi or ArmPlatformPkg/PlatformPei
 108   in the PEI phase.
 109
 110 **/
 111 VOID
 112 ArmPlatformNormalInitialize (
 113   VOID
 114   )
 115 {
 116   // Configure periodic timer (TIMER0) for 1MHz operation
 117   MmioOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, SP810_SYS_CTRL_TIMER0_TIMCLK);
 118   // Configure 1MHz clock
 119   MmioOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, SP810_SYS_CTRL_TIMER1_TIMCLK);
 120   // configure SP810 to use 1MHz clock and disable
 121   MmioAndThenOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER2_EN, SP810_SYS_CTRL_TIMER2_TIMCLK);
 122   // Configure SP810 to use 1MHz clock and disable
 123   MmioAndThenOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER3_EN, SP810_SYS_CTRL_TIMER3_TIMCLK);
 124 }
 125
 126 /**
 127   Initialize the system (or sometimes called permanent) memory
 128
 129   This memory is generally represented by the DRAM.
 130
 131 **/
 132 VOID
 133 ArmPlatformInitializeSystemMemory (
 134   VOID
 135   )
 136 {
 137   // We do not need to initialize the System Memory on RTSM
 138 }