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   Remap the memory at 0x0
  47
  48   Some platform requires or gives the ability to remap the memory at the address 0x0.
  49   This function can do nothing if this feature is not relevant to your platform.
  50
  51 **/
  52 VOID
  53 ArmPlatformBootRemapping (
  54   VOID
  55   )
  56 {
  57   // Disable memory remapping and return to normal mapping
  58   MmioOr32 (ARM_EB_SYSCTRL, BIT8); //EB_SP810_CTRL_BASE
  59 }
  60
  61 /**
  62   Return the current Boot Mode
  63
  64   This function returns the boot reason on the platform
  65
  66 **/
  67 EFI_BOOT_MODE
  68 ArmPlatformGetBootMode (
  69   VOID
  70   )
  71 {
  72   return BOOT_WITH_FULL_CONFIGURATION;
  73 }
  74
  75 /**
  76   Initialize controllers that must setup in the normal world
  77
  78   This function is called by the ArmPlatformPkg/PrePi or ArmPlatformPkg/PlatformPei
  79   in the PEI phase.
  80
  81 **/
  82 VOID
  83 ArmPlatformNormalInitialize (
  84   VOID
  85   )
  86 {
  87   // Configure periodic timer (TIMER0) for 1MHz operation
  88   MmioOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, SP810_SYS_CTRL_TIMER0_TIMCLK);
  89   // Configure 1MHz clock
  90   MmioOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, SP810_SYS_CTRL_TIMER1_TIMCLK);
  91   // configure SP810 to use 1MHz clock and disable
  92   MmioAndThenOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER2_EN, SP810_SYS_CTRL_TIMER2_TIMCLK);
  93   // Configure SP810 to use 1MHz clock and disable
  94   MmioAndThenOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER3_EN, SP810_SYS_CTRL_TIMER3_TIMCLK);
  95 }
  96
  97 /**
  98   Initialize the system (or sometimes called permanent) memory
  99
 100   This memory is generally represented by the DRAM.
 101
 102 **/
 103 VOID
 104 ArmPlatformInitializeSystemMemory (
 105   VOID
 106   )
 107 {
 108   // We do not need to initialize the System Memory on RTSM
 109 }