OvmfPkg/Bhyve/SmbiosPlatformDxe/Bhyve.c

   1 /*
   2  * Copyright (c) 2020, Rebecca Cran <rebecca@bsdio.com>
   3  * Copyright (c) 2014, Pluribus Networks, Inc.
   4  *
   5  * SPDX-License-Identifier: BSD-2-Clause-Patent
   6  */
   7
   8 #include "SmbiosPlatformDxe.h"
   9
  10 #define BHYVE_SMBIOS_PHYSICAL_ADDRESS  0x000F0000
  11 #define BHYVE_SMBIOS_PHYSICAL_END      0x000FFFFF
  12
  13 /**
  14   Locates the bhyve SMBIOS data if it exists
  15
  16   @return SMBIOS_TABLE_ENTRY_POINT   Address of bhyve SMBIOS data
  17
  18 **/
  19 SMBIOS_TABLE_ENTRY_POINT *
  20 GetBhyveSmbiosTables (
  21   VOID
  22   )
  23 {
  24   UINT8                     *BhyveSmbiosPtr;
  25   SMBIOS_TABLE_ENTRY_POINT  *BhyveSmbiosEntryPointStructure;
  26
  27   for (BhyveSmbiosPtr = (UINT8 *)(UINTN)BHYVE_SMBIOS_PHYSICAL_ADDRESS;
  28        BhyveSmbiosPtr < (UINT8 *)(UINTN)BHYVE_SMBIOS_PHYSICAL_END;
  29        BhyveSmbiosPtr += 0x10)
  30   {
  31     BhyveSmbiosEntryPointStructure = (SMBIOS_TABLE_ENTRY_POINT *)BhyveSmbiosPtr;
  32
  33     if (!AsciiStrnCmp ((CHAR8 *)BhyveSmbiosEntryPointStructure->AnchorString, "_SM_", 4) &&
  34         !AsciiStrnCmp ((CHAR8 *)BhyveSmbiosEntryPointStructure->IntermediateAnchorString, "_DMI_", 5) &&
  35         IsEntryPointStructureValid (BhyveSmbiosEntryPointStructure))
  36     {
  37       return BhyveSmbiosEntryPointStructure;
  38     }
  39   }
  40
  41   return NULL;
  42 }