OvmfPkg: Apply uncrustify changes

[mirror_edk2.git] / OvmfPkg / SmbiosPlatformDxe / X86Xen.c

/** @file\r
  Detect Xen hvmloader SMBIOS data for usage by OVMF.\r
\r
  Copyright (c) 2011, Bei Guan <gbtju85@gmail.com>\r
  Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Library/BaseLib.h> // AsciiStrnCmp()\r
#include <Library/HobLib.h>  // GetFirstGuidHob()\r
#include <Pi/PiHob.h>        // EFI_HOB_GUID_TYPE\r
\r
#include "XenSmbiosPlatformDxe.h"\r
\r
#define XEN_SMBIOS_PHYSICAL_ADDRESS  0x000EB000\r
#define XEN_SMBIOS_PHYSICAL_END      0x000F0000\r
\r
/**\r
  Validates the SMBIOS entry point structure\r
\r
  @param  EntryPointStructure  SMBIOS entry point structure\r
\r
  @retval TRUE   The entry point structure is valid\r
  @retval FALSE  The entry point structure is not valid\r
\r
**/\r
STATIC\r
BOOLEAN\r
IsEntryPointStructureValid (\r
  IN SMBIOS_TABLE_ENTRY_POINT  *EntryPointStructure\r
  )\r
{\r
  UINTN  Index;\r
  UINT8  Length;\r
  UINT8  Checksum;\r
  UINT8  *BytePtr;\r
\r
  BytePtr  = (UINT8 *)EntryPointStructure;\r
  Length   = EntryPointStructure->EntryPointLength;\r
  Checksum = 0;\r
\r
  for (Index = 0; Index < Length; Index++) {\r
    Checksum = Checksum + (UINT8)BytePtr[Index];\r
  }\r
\r
  if (Checksum != 0) {\r
    return FALSE;\r
  } else {\r
    return TRUE;\r
  }\r
}\r
\r
/**\r
  Locates the Xen SMBIOS data if it exists\r
\r
  @return SMBIOS_TABLE_ENTRY_POINT   Address of Xen SMBIOS data\r
\r
**/\r
SMBIOS_TABLE_ENTRY_POINT *\r
GetXenSmbiosTables (\r
  VOID\r
  )\r
{\r
  UINT8                     *XenSmbiosPtr;\r
  SMBIOS_TABLE_ENTRY_POINT  *XenSmbiosEntryPointStructure;\r
  EFI_HOB_GUID_TYPE         *GuidHob;\r
\r
  //\r
  // See if a XenInfo HOB is available\r
  //\r
  GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);\r
  if (GuidHob == NULL) {\r
    return NULL;\r
  }\r
\r
  for (XenSmbiosPtr = (UINT8 *)(UINTN)XEN_SMBIOS_PHYSICAL_ADDRESS;\r
       XenSmbiosPtr < (UINT8 *)(UINTN)XEN_SMBIOS_PHYSICAL_END;\r
       XenSmbiosPtr += 0x10)\r
  {\r
    XenSmbiosEntryPointStructure = (SMBIOS_TABLE_ENTRY_POINT *)XenSmbiosPtr;\r
\r
    if (!AsciiStrnCmp ((CHAR8 *)XenSmbiosEntryPointStructure->AnchorString, "_SM_", 4) &&\r
        !AsciiStrnCmp ((CHAR8 *)XenSmbiosEntryPointStructure->IntermediateAnchorString, "_DMI_", 5) &&\r
        IsEntryPointStructureValid (XenSmbiosEntryPointStructure))\r
    {\r
      return XenSmbiosEntryPointStructure;\r
    }\r
  }\r
\r
  return NULL;\r
}\r