FatPkg: Break down Part.c file.

[mirror_edk2.git] / FatPkg / FatPei / Part.c

/** @file\r
  Routines supporting partition discovery and\r
  logical device reading\r
\r
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r
\r
This program and the accompanying materials are licensed and made available\r
under the terms and conditions of the BSD License which accompanies this\r
distribution. The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include "FatLitePeim.h"\r
\r
/**\r
  This function finds Eltorito partitions. Main algorithm\r
  is ported from DXE partition driver.\r
\r
  @param[in]  PrivateData       The global memory map\r
  @param[in]  ParentBlockDevNo  The parent block device\r
\r
  @retval TRUE              New partitions are detected and logical block devices\r
                            are added to block device array\r
  @retval FALSE             No new partitions are added\r
\r
**/\r
BOOLEAN\r
FatFindEltoritoPartitions (\r
  IN  PEI_FAT_PRIVATE_DATA *PrivateData,\r
  IN  UINTN                ParentBlockDevNo\r
  );\r
\r
/**\r
  This function finds Mbr partitions. Main algorithm\r
  is ported from DXE partition driver.\r
\r
  @param[in]  PrivateData       The global memory map\r
  @param[in]  ParentBlockDevNo  The parent block device\r
\r
  @retval TRUE              New partitions are detected and logical block devices\r
                            are added to block device array\r
  @retval FALSE             No new partitions are added\r
\r
**/\r
BOOLEAN\r
FatFindMbrPartitions (\r
  IN  PEI_FAT_PRIVATE_DATA *PrivateData,\r
  IN  UINTN                ParentBlockDevNo\r
  );\r
\r
/**\r
  This function finds partitions (logical devices) in physical block devices.\r
\r
  @param  PrivateData       Global memory map for accessing global variables.\r
\r
**/\r
VOID\r
FatFindPartitions (\r
  IN  PEI_FAT_PRIVATE_DATA  *PrivateData\r
  )\r
{\r
  BOOLEAN Found;\r
  UINTN   Index;\r
\r
  do {\r
    Found = FALSE;\r
\r
    for (Index = 0; Index < PrivateData->BlockDeviceCount; Index++) {\r
      if (!PrivateData->BlockDevice[Index].PartitionChecked) {\r
        Found = FatFindMbrPartitions (PrivateData, Index);\r
        if (!Found) {\r
          Found = FatFindEltoritoPartitions (PrivateData, Index);\r
        }\r
      }\r
    }\r
  } while (Found && PrivateData->BlockDeviceCount <= PEI_FAT_MAX_BLOCK_DEVICE);\r
}\r
\r