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      1 /*++
      2 
      3 Copyright (c) 1999 - 2002, Intel Corporation. All rights reserved.<BR>
      4 This program and the accompanying materials
      5 are licensed and made available under the terms and conditions of the BSD License
      6 which accompanies this distribution.  The full text of the license may be found at
      7 http://opensource.org/licenses/bsd-license.php
      8 
      9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
     10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
     11 
     12 
     13 Module Name:
     14 
     15   BlockIo.h
     16 
     17 Abstract:
     18 
     19   BlockIo PPI as defined in EFI 2.0
     20 
     21   Used to access block-oriented storage devices
     22 
     23 --*/
     24 
     25 #ifndef _PEI_BLOCK_IO_H_
     26 #define _PEI_BLOCK_IO_H_
     27 
     28 #define PEI_BLOCK_IO_PPI_GUID \
     29   { \
     30     0x695d8aa1, 0x42ee, 0x4c46, {0x80, 0x5c, 0x6e, 0xa6, 0xbc, 0xe7, 0x99, 0xe3} \
     31   }
     32 
     33 EFI_FORWARD_DECLARATION (PEI_RECOVERY_BLOCK_IO_INTERFACE);
     34 
     35 typedef UINT64  PEI_LBA;
     36 
     37 typedef enum {
     38   LegacyFloppy  = 0,
     39   IdeCDROM      = 1,
     40   IdeLS120      = 2,
     41   UsbMassStorage= 3,
     42   MaxDeviceType
     43 } PEI_BLOCK_DEVICE_TYPE;
     44 
     45 typedef struct {
     46   PEI_BLOCK_DEVICE_TYPE DeviceType;
     47   BOOLEAN               MediaPresent;
     48   UINTN                 LastBlock;
     49   UINTN                 BlockSize;
     50 } PEI_BLOCK_IO_MEDIA;
     51 
     52 typedef
     53 EFI_STATUS
     54 (EFIAPI *PEI_GET_NUMBER_BLOCK_DEVICES) (
     55   IN  EFI_PEI_SERVICES                         **PeiServices,
     56   IN PEI_RECOVERY_BLOCK_IO_INTERFACE           * This,
     57   OUT UINTN                                    *NumberBlockDevices
     58   );
     59 
     60 typedef
     61 EFI_STATUS
     62 (EFIAPI *PEI_GET_DEVICE_MEDIA_INFORMATION) (
     63   IN  EFI_PEI_SERVICES                         **PeiServices,
     64   IN PEI_RECOVERY_BLOCK_IO_INTERFACE           * This,
     65   IN UINTN                                     DeviceIndex,
     66   OUT PEI_BLOCK_IO_MEDIA                       * MediaInfo
     67   );
     68 
     69 typedef
     70 EFI_STATUS
     71 (EFIAPI *PEI_READ_BLOCKS) (
     72   IN  EFI_PEI_SERVICES                         **PeiServices,
     73   IN PEI_RECOVERY_BLOCK_IO_INTERFACE           * This,
     74   IN UINTN                                     DeviceIndex,
     75   IN PEI_LBA                                   StartLBA,
     76   IN UINTN                                     BufferSize,
     77   OUT VOID                                     *Buffer
     78   );
     79 
     80 struct _PEI_RECOVERY_BLOCK_IO_INTERFACE {
     81   PEI_GET_NUMBER_BLOCK_DEVICES      GetNumberOfBlockDevices;
     82   PEI_GET_DEVICE_MEDIA_INFORMATION  GetBlockDeviceMediaInfo;
     83   PEI_READ_BLOCKS                   ReadBlocks;
     84 };
     85 
     86 extern EFI_GUID gPeiBlockIoPpiGuid;
     87 
     88 #endif
     89