system76-edk2/ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/RTSM.c

/** @file
*
*  Copyright (c) 2011, ARM Limited. All rights reserved.
*  
*  This program and the accompanying materials                          
*  are licensed and made available under the terms and conditions of the BSD License         
*  which accompanies this distribution.  The full text of the license may be found at        
*  http://opensource.org/licenses/bsd-license.php                                            
*
*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
*
**/

#include <Library/IoLib.h>
#include <Library/ArmPlatformLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>

#include <Drivers/SP804Timer.h>

#include <Ppi/ArmMpCoreInfo.h>

#include <ArmPlatform.h>

UINTN
ArmGetCpuCountPerCluster (
  VOID
  );

ARM_CORE_INFO mVersatileExpressMpCoreInfoTable[] = {
  {
    // Cluster 0, Core 0
    0x0, 0x0,

    // MP Core MailBox Set/Get/Clear Addresses and Clear Value
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_REG,
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_SET_REG,
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_CLR_REG,
    (UINT64)0xFFFFFFFF
  },
  {
    // Cluster 0, Core 1
    0x0, 0x1,

    // MP Core MailBox Set/Get/Clear Addresses and Clear Value
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_REG,
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_SET_REG,
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_CLR_REG,
    (UINT64)0xFFFFFFFF
  },
  {
    // Cluster 0, Core 2
    0x0, 0x2,

    // MP Core MailBox Set/Get/Clear Addresses and Clear Value
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_REG,
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_SET_REG,
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_CLR_REG,
    (UINT64)0xFFFFFFFF
  },
  {
    // Cluster 0, Core 3
    0x0, 0x3,

    // MP Core MailBox Set/Get/Clear Addresses and Clear Value
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_REG,
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_SET_REG,
    (EFI_PHYSICAL_ADDRESS)ARM_VE_SYS_FLAGS_CLR_REG,
    (UINT64)0xFFFFFFFF
  }
};

/**
  Return the current Boot Mode

  This function returns the boot reason on the platform

  @return   Return the current Boot Mode of the platform

**/
EFI_BOOT_MODE
ArmPlatformGetBootMode (
  VOID
  )
{
  return BOOT_WITH_FULL_CONFIGURATION;
}

/**
  Initialize controllers that must setup in the normal world

  This function is called by the ArmPlatformPkg/Pei or ArmPlatformPkg/Pei/PlatformPeim
  in the PEI phase.

**/
VOID
ArmPlatformNormalInitialize (
  VOID
  )
{
  // Disable memory remapping and return to normal mapping
  MmioOr32 (SP810_CTRL_BASE, BIT8);
}

/**
  Initialize the system (or sometimes called permanent) memory

  This memory is generally represented by the DRAM.

**/
VOID
ArmPlatformInitializeSystemMemory (
  VOID
  )
{
  // Configure periodic timer (TIMER0) for 1MHz operation
  MmioOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, SP810_SYS_CTRL_TIMER0_TIMCLK);
  // Configure 1MHz clock
  MmioOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, SP810_SYS_CTRL_TIMER1_TIMCLK);
  // configure SP810 to use 1MHz clock and disable
  MmioAndThenOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER2_EN, SP810_SYS_CTRL_TIMER2_TIMCLK);
  // Configure SP810 to use 1MHz clock and disable
  MmioAndThenOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER3_EN, SP810_SYS_CTRL_TIMER3_TIMCLK);
}

EFI_STATUS
PrePeiCoreGetMpCoreInfo (
  OUT UINTN                   *CoreCount,
  OUT ARM_CORE_INFO           **ArmCoreTable
  )
{
  UINT32   ProcType;

  ProcType = MmioRead32 (ARM_VE_SYS_PROCID0_REG) & ARM_VE_SYS_PROC_ID_MASK;
  if ((ProcType == ARM_VE_SYS_PROC_ID_CORTEX_A9) || (ProcType == ARM_VE_SYS_PROC_ID_CORTEX_A15)) {
    // Only support one cluster
    *CoreCount    = ArmGetCpuCountPerCluster ();
    *ArmCoreTable = mVersatileExpressMpCoreInfoTable;
    return EFI_SUCCESS;
  } else {
    return EFI_UNSUPPORTED;
  }
}

// Needs to be declared in the file. Otherwise gArmMpCoreInfoPpiGuid is undefined in the contect of PrePeiCore
EFI_GUID mArmMpCoreInfoPpiGuid = ARM_MP_CORE_INFO_PPI_GUID;
ARM_MP_CORE_INFO_PPI mMpCoreInfoPpi = { PrePeiCoreGetMpCoreInfo };

EFI_PEI_PPI_DESCRIPTOR      gPlatformPpiTable[] = {
  {
    EFI_PEI_PPI_DESCRIPTOR_PPI,
    &mArmMpCoreInfoPpiGuid,
    &mMpCoreInfoPpi
  }
};

VOID
ArmPlatformGetPlatformPpiList (
  OUT UINTN                   *PpiListSize,
  OUT EFI_PEI_PPI_DESCRIPTOR  **PpiList
  )
{
  *PpiListSize = sizeof(gPlatformPpiTable);
  *PpiList = gPlatformPpiTable;
}