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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/** @file
Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
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.
**/
#include <Uefi.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/LoadLinuxLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/QemuFwCfgLib.h>
#include <Library/ReportStatusCodeLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
EFI_STATUS
TryRunningQemuKernel (
VOID
)
{
EFI_STATUS Status;
UINTN KernelSize;
UINTN KernelInitialSize;
VOID *KernelBuf;
UINTN SetupSize;
VOID *SetupBuf;
UINTN CommandLineSize;
CHAR8 *CommandLine;
UINTN InitrdSize;
VOID* InitrdData;
SetupBuf = NULL;
SetupSize = 0;
KernelBuf = NULL;
KernelInitialSize = 0;
CommandLine = NULL;
CommandLineSize = 0;
InitrdData = NULL;
InitrdSize = 0;
if (!QemuFwCfgIsAvailable ()) {
return EFI_NOT_FOUND;
}
QemuFwCfgSelectItem (QemuFwCfgItemKernelSize);
KernelSize = (UINTN) QemuFwCfgRead64 ();
QemuFwCfgSelectItem (QemuFwCfgItemKernelSetupSize);
SetupSize = (UINTN) QemuFwCfgRead64 ();
if (KernelSize == 0 || SetupSize == 0) {
DEBUG ((EFI_D_INFO, "qemu -kernel was not used.\n"));
return EFI_NOT_FOUND;
}
SetupBuf = LoadLinuxAllocateKernelSetupPages (EFI_SIZE_TO_PAGES (SetupSize));
if (SetupBuf == NULL) {
DEBUG ((EFI_D_ERROR, "Unable to allocate memory for kernel setup!\n"));
return EFI_OUT_OF_RESOURCES;
}
DEBUG ((EFI_D_INFO, "Setup size: 0x%x\n", (UINT32) SetupSize));
DEBUG ((EFI_D_INFO, "Reading kernel setup image ..."));
QemuFwCfgSelectItem (QemuFwCfgItemKernelSetupData);
QemuFwCfgReadBytes (SetupSize, SetupBuf);
DEBUG ((EFI_D_INFO, " [done]\n"));
Status = LoadLinuxCheckKernelSetup (SetupBuf, SetupSize);
if (EFI_ERROR (Status)) {
goto FreeAndReturn;
}
Status = LoadLinuxInitializeKernelSetup (SetupBuf);
if (EFI_ERROR (Status)) {
goto FreeAndReturn;
}
KernelInitialSize = LoadLinuxGetKernelSize (SetupBuf, KernelSize);
if (KernelInitialSize == 0) {
Status = EFI_UNSUPPORTED;
goto FreeAndReturn;
}
KernelBuf = LoadLinuxAllocateKernelPages (
SetupBuf,
EFI_SIZE_TO_PAGES (KernelInitialSize));
if (KernelBuf == NULL) {
DEBUG ((EFI_D_ERROR, "Unable to allocate memory for kernel!\n"));
Status = EFI_OUT_OF_RESOURCES;
goto FreeAndReturn;
}
DEBUG ((EFI_D_INFO, "Kernel size: 0x%x\n", (UINT32) KernelSize));
DEBUG ((EFI_D_INFO, "Reading kernel image ..."));
QemuFwCfgSelectItem (QemuFwCfgItemKernelData);
QemuFwCfgReadBytes (KernelSize, KernelBuf);
DEBUG ((EFI_D_INFO, " [done]\n"));
QemuFwCfgSelectItem (QemuFwCfgItemCommandLineSize);
CommandLineSize = (UINTN) QemuFwCfgRead64 ();
if (CommandLineSize > 0) {
CommandLine = LoadLinuxAllocateCommandLinePages (
EFI_SIZE_TO_PAGES (CommandLineSize));
QemuFwCfgSelectItem (QemuFwCfgItemCommandLineData);
QemuFwCfgReadBytes (CommandLineSize, CommandLine);
} else {
CommandLine = NULL;
}
Status = LoadLinuxSetCommandLine (SetupBuf, CommandLine);
if (EFI_ERROR (Status)) {
goto FreeAndReturn;
}
QemuFwCfgSelectItem (QemuFwCfgItemInitrdSize);
InitrdSize = (UINTN) QemuFwCfgRead64 ();
if (InitrdSize > 0) {
InitrdData = LoadLinuxAllocateInitrdPages (
SetupBuf,
EFI_SIZE_TO_PAGES (InitrdSize)
);
DEBUG ((EFI_D_INFO, "Initrd size: 0x%x\n", (UINT32) InitrdSize));
DEBUG ((EFI_D_INFO, "Reading initrd image ..."));
QemuFwCfgSelectItem (QemuFwCfgItemInitrdData);
QemuFwCfgReadBytes (InitrdSize, InitrdData);
DEBUG ((EFI_D_INFO, " [done]\n"));
} else {
InitrdData = NULL;
}
Status = LoadLinuxSetInitrd (SetupBuf, InitrdData, InitrdSize);
if (EFI_ERROR (Status)) {
goto FreeAndReturn;
}
//
// Signal the EVT_SIGNAL_READY_TO_BOOT event
//
EfiSignalEventReadyToBoot();
REPORT_STATUS_CODE (EFI_PROGRESS_CODE,
(EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_DXE_BS_PC_READY_TO_BOOT_EVENT));
Status = LoadLinux (KernelBuf, SetupBuf);
FreeAndReturn:
if (SetupBuf != NULL) {
FreePages (SetupBuf, EFI_SIZE_TO_PAGES (SetupSize));
}
if (KernelBuf != NULL) {
FreePages (KernelBuf, EFI_SIZE_TO_PAGES (KernelInitialSize));
}
if (CommandLine != NULL) {
FreePages (CommandLine, EFI_SIZE_TO_PAGES (CommandLineSize));
}
if (InitrdData != NULL) {
FreePages (InitrdData, EFI_SIZE_TO_PAGES (InitrdSize));
}
return Status;
}
|