ArmSmcPsciResetSystemLib.c

Go to the documentation of this file.

 
#include <PiDxe.h>
 
#include <Library/ArmSmcLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/ResetSystemLib.h>
 
#include <IndustryStandard/ArmStdSmc.h>
 
VOID
EFIAPI
ResetCold (
  VOID
  )
{
  // Send a PSCI 0.2 SYSTEM_RESET command
  ArmCallSmc0 (ARM_SMC_ID_PSCI_SYSTEM_RESET, NULL, NULL, NULL);
}
 
VOID
EFIAPI
ResetWarm (
  VOID
  )
{
  UINTN  Arg1;
  UINTN  Ret;
 
  Arg1 = ARM_SMC_ID_PSCI_SYSTEM_RESET2_AARCH64;
 
  // Is SYSTEM_RESET2 supported?
  Ret = ArmCallSmc0 (ARM_SMC_ID_PSCI_FEATURES, &Arg1, NULL, NULL);
  if (Ret == ARM_SMC_PSCI_RET_SUCCESS) {
    // Send PSCI SYSTEM_RESET2 command
    ArmCallSmc0 (Arg1, NULL, NULL, NULL);
  } else {
    // Map a warm reset into a cold reset
    DEBUG ((
      DEBUG_INFO,
      "Warm reboot not supported by platform, issuing cold reboot\n"
      ));
    ResetCold ();
  }
}
 
VOID
EFIAPI
ResetShutdown (
  VOID
  )
{
  // Send a PSCI 0.2 SYSTEM_OFF command
  ArmCallSmc0 (ARM_SMC_ID_PSCI_SYSTEM_OFF, NULL, NULL, NULL);
}
 
VOID
EFIAPI
ResetPlatformSpecific (
  IN UINTN  DataSize,
  IN VOID   *ResetData
  )
{
  // Map the platform specific reset as reboot
  ResetCold ();
}
 
VOID
EFIAPI
ResetSystem (
  IN EFI_RESET_TYPE  ResetType,
  IN EFI_STATUS      ResetStatus,
  IN UINTN           DataSize,
  IN VOID            *ResetData OPTIONAL
  )
{
  switch (ResetType) {
    case EfiResetWarm:
      ResetWarm ();
      break;
 
    case EfiResetCold:
      ResetCold ();
      break;
 
    case EfiResetShutdown:
      ResetShutdown ();
      return;
 
    case EfiResetPlatformSpecific:
      ResetPlatformSpecific (DataSize, ResetData);
      return;
 
    default:
      return;
  }
}