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
|
/** @file
The KvmtoolPlatformDxe performs the platform specific initialization like:
- It decides if the firmware should expose ACPI or Device Tree-based
hardware description to the operating system.
Copyright (c) 2018 - 2023, Arm Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Guid/VariableFormat.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Protocol/FdtClient.h>
/** Decide if the firmware should expose ACPI tables or Device Tree and
install the appropriate protocol interface.
Note: This function is derived from "ArmVirtPkg/PlatformHasAcpiDtDxe",
by dropping the word size check, and the fw_cfg check.
@param [in] ImageHandle Handle for this image.
@retval EFI_SUCCESS Success.
@retval EFI_OUT_OF_RESOURCES There was not enough memory to install the
protocols.
@retval EFI_INVALID_PARAMETER A parameter is invalid.
**/
STATIC
EFI_STATUS
PlatformHasAcpiDt (
IN EFI_HANDLE ImageHandle
)
{
if (!PcdGetBool (PcdForceNoAcpi)) {
// Expose ACPI tables
return gBS->InstallProtocolInterface (
&ImageHandle,
&gEdkiiPlatformHasAcpiGuid,
EFI_NATIVE_INTERFACE,
NULL
);
}
// Expose the Device Tree.
return gBS->InstallProtocolInterface (
&ImageHandle,
&gEdkiiPlatformHasDeviceTreeGuid,
EFI_NATIVE_INTERFACE,
NULL
);
}
/** Entry point for Kvmtool Platform Dxe
@param [in] ImageHandle Handle for this image.
@param [in] SystemTable Pointer to the EFI system table.
@retval EFI_SUCCESS Success.
@retval EFI_OUT_OF_RESOURCES There was not enough memory to install the
protocols.
@retval EFI_INVALID_PARAMETER A parameter is invalid.
**/
EFI_STATUS
EFIAPI
KvmtoolPlatformDxeEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
if (PcdGetBool (PcdEmuVariableNvModeEnable)) {
// The driver implementing the variable service can now be dispatched.
Status = gBS->InstallProtocolInterface (
&gImageHandle,
&gEdkiiNvVarStoreFormattedGuid,
EFI_NATIVE_INTERFACE,
NULL
);
ASSERT_EFI_ERROR (Status);
}
Status = PlatformHasAcpiDt (ImageHandle);
ASSERT_EFI_ERROR (Status);
return Status;
}
|
