1 /**@file
2 Functions related to the Firmware Volume Block service whose
3 implementation is specific to the runtime DXE driver build.
4
5 Copyright (C) 2015, Red Hat, Inc.
6 Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
7
8 This program and the accompanying materials are licensed and made available
9 under the terms and conditions of the BSD License which accompanies this
10 distribution. The full text of the license may be found at
11 http://opensource.org/licenses/bsd-license.php
12
13 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
14 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15 **/
16
17 #include <Guid/EventGroup.h>
18 #include <Library/DebugLib.h>
19 #include <Library/DevicePathLib.h>
20 #include <Library/PcdLib.h>
21 #include <Library/UefiBootServicesTableLib.h>
22 #include <Library/UefiRuntimeLib.h>
23 #include <Protocol/DevicePath.h>
24 #include <Protocol/FirmwareVolumeBlock.h>
25
26 #include "FwBlockService.h"
27 #include "QemuFlash.h"
28
29 VOID
InstallProtocolInterfaces(IN EFI_FW_VOL_BLOCK_DEVICE * FvbDevice)30 InstallProtocolInterfaces (
31 IN EFI_FW_VOL_BLOCK_DEVICE *FvbDevice
32 )
33 {
34 EFI_STATUS Status;
35 EFI_HANDLE FwbHandle;
36 EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *OldFwbInterface;
37
38 ASSERT (!FeaturePcdGet (PcdSmmSmramRequire));
39
40 //
41 // Find a handle with a matching device path that has supports FW Block
42 // protocol
43 //
44 Status = gBS->LocateDevicePath (&gEfiFirmwareVolumeBlockProtocolGuid,
45 &FvbDevice->DevicePath, &FwbHandle);
46 if (EFI_ERROR (Status)) {
47 //
48 // LocateDevicePath fails so install a new interface and device path
49 //
50 FwbHandle = NULL;
51 DEBUG ((EFI_D_INFO, "Installing QEMU flash FVB\n"));
52 Status = gBS->InstallMultipleProtocolInterfaces (
53 &FwbHandle,
54 &gEfiFirmwareVolumeBlockProtocolGuid,
55 &FvbDevice->FwVolBlockInstance,
56 &gEfiDevicePathProtocolGuid,
57 FvbDevice->DevicePath,
58 NULL
59 );
60 ASSERT_EFI_ERROR (Status);
61 } else if (IsDevicePathEnd (FvbDevice->DevicePath)) {
62 //
63 // Device already exists, so reinstall the FVB protocol
64 //
65 Status = gBS->HandleProtocol (
66 FwbHandle,
67 &gEfiFirmwareVolumeBlockProtocolGuid,
68 (VOID**)&OldFwbInterface
69 );
70 ASSERT_EFI_ERROR (Status);
71
72 DEBUG ((EFI_D_INFO, "Reinstalling FVB for QEMU flash region\n"));
73 Status = gBS->ReinstallProtocolInterface (
74 FwbHandle,
75 &gEfiFirmwareVolumeBlockProtocolGuid,
76 OldFwbInterface,
77 &FvbDevice->FwVolBlockInstance
78 );
79 ASSERT_EFI_ERROR (Status);
80 } else {
81 //
82 // There was a FVB protocol on an End Device Path node
83 //
84 ASSERT (FALSE);
85 }
86 }
87
88
89 STATIC
90 VOID
91 EFIAPI
FvbVirtualAddressChangeEvent(IN EFI_EVENT Event,IN VOID * Context)92 FvbVirtualAddressChangeEvent (
93 IN EFI_EVENT Event,
94 IN VOID *Context
95 )
96 /*++
97
98 Routine Description:
99
100 Fixup internal data so that EFI and SAL can be call in virtual mode.
101 Call the passed in Child Notify event and convert the mFvbModuleGlobal
102 date items to there virtual address.
103
104 Arguments:
105
106 (Standard EFI notify event - EFI_EVENT_NOTIFY)
107
108 Returns:
109
110 None
111
112 --*/
113 {
114 EFI_FW_VOL_INSTANCE *FwhInstance;
115 UINTN Index;
116
117 FwhInstance = mFvbModuleGlobal->FvInstance;
118 EfiConvertPointer (0x0, (VOID **) &mFvbModuleGlobal->FvInstance);
119
120 //
121 // Convert the base address of all the instances
122 //
123 Index = 0;
124 while (Index < mFvbModuleGlobal->NumFv) {
125 EfiConvertPointer (0x0, (VOID **) &FwhInstance->FvBase);
126 FwhInstance = (EFI_FW_VOL_INSTANCE *)
127 (
128 (UINTN) ((UINT8 *) FwhInstance) +
129 FwhInstance->VolumeHeader.HeaderLength +
130 (sizeof (EFI_FW_VOL_INSTANCE) - sizeof (EFI_FIRMWARE_VOLUME_HEADER))
131 );
132 Index++;
133 }
134
135 EfiConvertPointer (0x0, (VOID **) &mFvbModuleGlobal);
136 QemuFlashConvertPointers ();
137 }
138
139
140 VOID
InstallVirtualAddressChangeHandler(VOID)141 InstallVirtualAddressChangeHandler (
142 VOID
143 )
144 {
145 EFI_STATUS Status;
146 EFI_EVENT VirtualAddressChangeEvent;
147
148 Status = gBS->CreateEventEx (
149 EVT_NOTIFY_SIGNAL,
150 TPL_NOTIFY,
151 FvbVirtualAddressChangeEvent,
152 NULL,
153 &gEfiEventVirtualAddressChangeGuid,
154 &VirtualAddressChangeEvent
155 );
156 ASSERT_EFI_ERROR (Status);
157 }
158