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
|
/*++
Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
WinNtFwh.c
Abstract:
PEIM to abstract construction of firmware volume in a Windows NT environment.
Revision History
--*/
#include <FlashLayout.h>
EFI_STATUS
EFIAPI
PeimInitializeWinNtFwh (
IN EFI_FFS_FILE_HEADER *FfsHeader,
IN EFI_PEI_SERVICES **PeiServices
)
/*++
Routine Description:
Perform a call-back into the SEC simulator to get address of the Firmware Hub
Arguments:
FfsHeader - Ffs Header availible to every PEIM
PeiServices - General purpose services available to every PEIM.
Returns:
None
--*/
{
EFI_STATUS Status;
EFI_PEI_PPI_DESCRIPTOR *PpiDescriptor;
NT_FWH_PPI *FwhPpi;
EFI_PHYSICAL_ADDRESS FdBase;
EFI_FIRMWARE_VOLUME_HEADER *FvHeader;
UINT64 FdSize;
UINTN Index;
DEBUG ((EFI_D_ERROR, "NT 32 Firmware Volume PEIM Loaded\n"));
//
// Get the Fwh Information PPI
//
Status = (**PeiServices).LocatePpi (
PeiServices,
&gNtFwhPpiGuid, // GUID
0, // INSTANCE
&PpiDescriptor, // EFI_PEI_PPI_DESCRIPTOR
&FwhPpi // PPI
);
ASSERT_EFI_ERROR (Status);
Index = 0;
do {
//
// Get information about all the FD's in the system
//
Status = FwhPpi->NtFwh (Index, &FdBase, &FdSize);
if (!EFI_ERROR (Status)) {
//
// Assume the FD starts with an FV header
//
FvHeader = (EFI_FIRMWARE_VOLUME_HEADER *) (UINTN) FdBase;
//
// Make an FV Hob for the first FV in the FD
//
BuildFvHob (FdBase, FvHeader->FvLength);
if (Index == 0) {
//
// Assume the first FD was produced by the NT32.DSC
// All these strange offests are needed to keep in
// sync with the FlashMap and NT32.dsc file
//
BuildResourceDescriptorHob (
EFI_RESOURCE_FIRMWARE_DEVICE,
(EFI_RESOURCE_ATTRIBUTE_PRESENT | EFI_RESOURCE_ATTRIBUTE_INITIALIZED | EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE),
FdBase,
(FvHeader->FvLength + EFI_WINNT_RUNTIME_UPDATABLE_LENGTH + EFI_WINNT_FTW_SPARE_BLOCK_LENGTH)
);
//
// Hard code the address of the spare block and variable services.
// Assume it's a hard coded offset from FV0 in FD0.
//
FdBase = FdBase + EFI_WINNT_RUNTIME_UPDATABLE_OFFSET;
FdSize = EFI_WINNT_RUNTIME_UPDATABLE_LENGTH + EFI_WINNT_FTW_SPARE_BLOCK_LENGTH;
BuildFvHob (FdBase, FdSize);
} else {
//
// For other FD's just map them in.
//
BuildResourceDescriptorHob (
EFI_RESOURCE_FIRMWARE_DEVICE,
(EFI_RESOURCE_ATTRIBUTE_PRESENT | EFI_RESOURCE_ATTRIBUTE_INITIALIZED | EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE),
FdBase,
FdSize
);
}
}
Index++;
} while (!EFI_ERROR (Status));
return Status;
}
|
