UefiCpuPkg: Move AsmRelocateApLoopStart from Mpfuncs.nasm to AmdSev.nasm

[mirror_edk2.git] / OvmfPkg / AcpiPlatformDxe / EntryPoint.c

/** @file\r
  Entry point of OVMF ACPI Platform Driver\r
\r
  Copyright (C) 2015, Red Hat, Inc.\r
  Copyright (c) 2008 - 2015, Intel Corporation. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
**/\r
\r
#include <Guid/RootBridgesConnectedEventGroup.h> // gRootBridgesConnectedEve...\r
#include <Library/DebugLib.h>                    // DEBUG()\r
#include <Library/PcdLib.h>                      // PcdGetBool()\r
#include <Library/UefiBootServicesTableLib.h>    // gBS\r
#include <Protocol/AcpiTable.h>                  // EFI_ACPI_TABLE_PROTOCOL\r
\r
#include "AcpiPlatform.h"\r
\r
STATIC\r
EFI_ACPI_TABLE_PROTOCOL *\r
FindAcpiTableProtocol (\r
  VOID\r
  )\r
{\r
  EFI_STATUS               Status;\r
  EFI_ACPI_TABLE_PROTOCOL  *AcpiTable;\r
\r
  Status = gBS->LocateProtocol (\r
                  &gEfiAcpiTableProtocolGuid,\r
                  NULL,\r
                  (VOID **)&AcpiTable\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
  return AcpiTable;\r
}\r
\r
STATIC\r
VOID\r
EFIAPI\r
OnRootBridgesConnected (\r
  IN EFI_EVENT  Event,\r
  IN VOID       *Context\r
  )\r
{\r
  EFI_STATUS  Status;\r
\r
  DEBUG ((\r
    DEBUG_INFO,\r
    "%a: root bridges have been connected, installing ACPI tables\n",\r
    __FUNCTION__\r
    ));\r
  Status = InstallAcpiTables (FindAcpiTableProtocol ());\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((DEBUG_ERROR, "%a: InstallAcpiTables: %r\n", __FUNCTION__, Status));\r
  }\r
\r
  gBS->CloseEvent (Event);\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
AcpiPlatformEntryPoint (\r
  IN EFI_HANDLE        ImageHandle,\r
  IN EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  EFI_STATUS  Status;\r
  EFI_EVENT   RootBridgesConnected;\r
\r
  //\r
  // If the platform doesn't support PCI, or PCI enumeration has been disabled,\r
  // install the tables at once, and let the entry point's return code reflect\r
  // the full functionality.\r
  //\r
  if (PcdGetBool (PcdPciDisableBusEnumeration)) {\r
    DEBUG ((\r
      DEBUG_INFO,\r
      "%a: PCI or its enumeration disabled, installing "\r
      "ACPI tables\n",\r
      __FUNCTION__\r
      ));\r
    return InstallAcpiTables (FindAcpiTableProtocol ());\r
  }\r
\r
  //\r
  // Otherwise, delay installing the ACPI tables until root bridges are\r
  // connected. The entry point's return status will only reflect the callback\r
  // setup. (Note that we're a DXE_DRIVER; our entry point function is invoked\r
  // strictly before BDS is entered and can connect the root bridges.)\r
  //\r
  Status = gBS->CreateEventEx (\r
                  EVT_NOTIFY_SIGNAL,\r
                  TPL_CALLBACK,\r
                  OnRootBridgesConnected,\r
                  NULL /* Context */,\r
                  &gRootBridgesConnectedEventGroupGuid,\r
                  &RootBridgesConnected\r
                  );\r
  if (!EFI_ERROR (Status)) {\r
    DEBUG ((\r
      DEBUG_INFO,\r
      "%a: waiting for root bridges to be connected, registered callback\n",\r
      __FUNCTION__\r
      ));\r
  }\r
\r
  return Status;\r
}\r