1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/** @file
Flash Device Library based on SPI Flash library.
Copyright (c) 2018 - 2021, Intel Corporation. All rights reserved. <BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiDxe.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/SpiFlashLib.h>
/**
Initialize spi flash device.
@retval EFI_SUCCESS The tested spi flash device is supported.
@retval EFI_UNSUPPORTED The tested spi flash device is not supported.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceInit (
VOID
)
{
return SpiConstructor ();
}
/**
Read NumBytes bytes of data from the address specified by
PAddress into Buffer.
@param[in] PAddress The starting physical address of the read.
@param[in,out] NumBytes On input, the number of bytes to read. On output, the number
of bytes actually read.
@param[out] Buffer The destination data buffer for the read.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceRead (
IN UINTN PAddress,
IN OUT UINTN *NumBytes,
OUT UINT8 *Buffer
)
{
EFI_STATUS Status;
UINT32 ByteCount;
UINT32 RgnSize;
UINT32 AddrOffset;
Status = SpiGetRegionAddress (FlashRegionBios, NULL, &RgnSize);
if (EFI_ERROR (Status)) {
return Status;
}
// BIOS region offset can be calculated by (PAddress - (0x100000000 - RgnSize))
// which equal (PAddress + RgnSize) here.
AddrOffset = (UINT32)((UINT32)PAddress + RgnSize);
ByteCount = (UINT32)*NumBytes;
return SpiFlashRead (FlashRegionBios, AddrOffset, ByteCount, Buffer);
}
/**
Write NumBytes bytes of data from Buffer to the address specified by
PAddresss.
@param[in] PAddress The starting physical address of the write.
@param[in,out] NumBytes On input, the number of bytes to write. On output,
the actual number of bytes written.
@param[in] Buffer The source data buffer for the write.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceWrite (
IN UINTN PAddress,
IN OUT UINTN *NumBytes,
IN UINT8 *Buffer
)
{
EFI_STATUS Status;
UINT32 ByteCount;
UINT32 RgnSize;
UINT32 AddrOffset;
Status = SpiGetRegionAddress (FlashRegionBios, NULL, &RgnSize);
if (EFI_ERROR (Status)) {
return Status;
}
// BIOS region offset can be calculated by (PAddress - (0x100000000 - RgnSize))
// which equal (PAddress + RgnSize) here.
AddrOffset = (UINT32)((UINT32)PAddress + RgnSize);
ByteCount = (UINT32)*NumBytes;
return SpiFlashWrite (FlashRegionBios, AddrOffset, ByteCount, Buffer);
}
/**
Erase the block starting at PAddress.
@param[in] PAddress The starting physical address of the block to be erased.
This library assume that caller garantee that the PAddress
is at the starting address of this block.
@param[in] LbaLength The length of the logical block to be erased.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceBlockErase (
IN UINTN PAddress,
IN UINTN LbaLength
)
{
EFI_STATUS Status;
UINT32 RgnSize;
UINT32 AddrOffset;
Status = SpiGetRegionAddress (FlashRegionBios, NULL, &RgnSize);
if (EFI_ERROR (Status)) {
return Status;
}
// BIOS region offset can be calculated by (PAddress - (0x100000000 - RgnSize))
// which equal (PAddress + RgnSize) here.
AddrOffset = (UINT32)((UINT32)PAddress + RgnSize);
return SpiFlashErase (FlashRegionBios, AddrOffset, (UINT32)LbaLength);
}
/**
Lock or unlock the block starting at PAddress.
@param[in] PAddress The starting physical address of region to be (un)locked.
@param[in] LbaLength The length of the logical block to be erased.
@param[in] Lock TRUE to lock. FALSE to unlock.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceBlockLock (
IN UINTN PAddress,
IN UINTN LbaLength,
IN BOOLEAN Lock
)
{
return EFI_SUCCESS;
}
|