OpenRuntime.c

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#include "OpenRuntimePrivate.h"
 
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/OcBootManagementLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
 
#include <Protocol/LoadedImage.h>
#include <Protocol/OcFirmwareRuntime.h>
 
STATIC
VOID
EFIAPI
FwGetCurrent (
  OUT OC_FWRT_CONFIG  *Config
  )
{
  CopyMem (Config, gCurrentConfig, sizeof (*Config));
}
 
STATIC
VOID
EFIAPI
FwSetMain (
  IN CONST OC_FWRT_CONFIG  *Config
  )
{
  CopyMem (&gMainConfig, Config, sizeof (gMainConfig));
}
 
STATIC
VOID
EFIAPI
FwSetOverride (
  IN CONST OC_FWRT_CONFIG  *Config
  )
{
  if (Config != NULL) {
    CopyMem (&gOverrideConfig, Config, sizeof (gOverrideConfig));
    gCurrentConfig = &gOverrideConfig;
  } else {
    gCurrentConfig = &gMainConfig;
  }
}
 
STATIC
EFI_STATUS
EFIAPI
FwGetExecArea (
  OUT EFI_PHYSICAL_ADDRESS  *BaseAddress,
  OUT UINTN                 *Pages
  )
{
  //
  // FIXME: This is not accurate, but it does not need to be for now.
  //
  *BaseAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)FwGetCurrent;
  *Pages       = 1;
  return EFI_SUCCESS;
}
 
STATIC
OC_FIRMWARE_RUNTIME_PROTOCOL
  mOcFirmwareRuntimeProtocol = {
  OC_FIRMWARE_RUNTIME_REVISION,
  FwGetCurrent,
  FwSetMain,
  FwSetOverride,
  FwOnGetVariable,
  FwOnSetAddressMap,
  FwGetExecArea
};
 
EFI_STATUS
EFIAPI
UefiEntrypoint (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;
  VOID        *Interface;
  EFI_HANDLE  Handle;
 
  Status = gBS->LocateProtocol (
                  &gOcFirmwareRuntimeProtocolGuid,
                  NULL,
                  &Interface
                  );
 
  if (!EFI_ERROR (Status)) {
    //
    // In case for whatever reason one tried to reload the driver.
    //
    return EFI_ALREADY_STARTED;
  }
 
  //
  // Activate main configuration.
  //
  gCurrentConfig = &gMainConfig;
 
  RedirectRuntimeServices ();
 
  Handle = NULL;
  Status = gBS->InstallMultipleProtocolInterfaces (
                  &Handle,
                  &gOcFirmwareRuntimeProtocolGuid,
                  &mOcFirmwareRuntimeProtocol,
                  NULL
                  );
 
  ASSERT_EFI_ERROR (Status);
 
  return EFI_SUCCESS;
}