1 | /** @file
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2 | OVMF support for QEMU system firmware flash device
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3 |
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4 | Copyright (c) 2009 - 2013, Intel Corporation. All rights reserved.<BR>
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5 |
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6 | SPDX-License-Identifier: BSD-2-Clause-Patent
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7 |
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8 | **/
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9 |
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10 | #ifndef __QEMU_FLASH_H__
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11 | #define __QEMU_FLASH_H__
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12 |
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13 | #include <Protocol/FirmwareVolumeBlock.h>
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14 |
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15 | extern UINT8 *mFlashBase;
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16 |
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17 | /**
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18 | Read from QEMU Flash
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19 |
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20 | @param[in] Lba The starting logical block index to read from.
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21 | @param[in] Offset Offset into the block at which to begin reading.
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22 | @param[in] NumBytes On input, indicates the requested read size. On
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23 | output, indicates the actual number of bytes read
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24 | @param[in] Buffer Pointer to the buffer to read into.
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25 |
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26 | **/
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27 | EFI_STATUS
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28 | QemuFlashRead (
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29 | IN EFI_LBA Lba,
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30 | IN UINTN Offset,
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31 | IN UINTN *NumBytes,
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32 | IN UINT8 *Buffer
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33 | );
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34 |
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35 |
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36 | /**
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37 | Write to QEMU Flash
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38 |
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39 | @param[in] Lba The starting logical block index to write to.
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40 | @param[in] Offset Offset into the block at which to begin writing.
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41 | @param[in] NumBytes On input, indicates the requested write size. On
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42 | output, indicates the actual number of bytes written
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43 | @param[in] Buffer Pointer to the data to write.
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44 |
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45 | **/
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46 | EFI_STATUS
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47 | QemuFlashWrite (
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48 | IN EFI_LBA Lba,
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49 | IN UINTN Offset,
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50 | IN UINTN *NumBytes,
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51 | IN UINT8 *Buffer
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52 | );
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53 |
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54 |
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55 | /**
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56 | Erase a QEMU Flash block
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57 |
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58 | @param Lba The logical block index to erase.
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59 |
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60 | **/
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61 | EFI_STATUS
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62 | QemuFlashEraseBlock (
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63 | IN EFI_LBA Lba
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64 | );
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65 |
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66 |
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67 | /**
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68 | Initializes QEMU flash memory support
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69 |
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70 | @retval EFI_WRITE_PROTECTED The QEMU flash device is not present.
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71 | @retval EFI_SUCCESS The QEMU flash device is supported.
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72 |
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73 | **/
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74 | EFI_STATUS
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75 | QemuFlashInitialize (
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76 | VOID
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77 | );
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78 |
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79 |
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80 | VOID
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81 | QemuFlashConvertPointers (
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82 | VOID
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83 | );
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84 |
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85 | VOID
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86 | QemuFlashBeforeProbe (
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87 | IN EFI_PHYSICAL_ADDRESS BaseAddress,
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88 | IN UINTN FdBlockSize,
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89 | IN UINTN FdBlockCount
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90 | );
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91 |
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92 | #endif
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93 |
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