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
175
176
177
178
|
/** @file
Copyright (c) 2013-2015, ARM Ltd. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "AndroidFastbootApp.h"
#include <Protocol/DevicePath.h>
#include <Protocol/LoadedImage.h>
#include <Library/DevicePathLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
// Device Path representing an image in memory
#pragma pack(1)
typedef struct {
MEMMAP_DEVICE_PATH Node1;
EFI_DEVICE_PATH_PROTOCOL End;
} MEMORY_DEVICE_PATH;
#pragma pack()
STATIC CONST MEMORY_DEVICE_PATH MemoryDevicePathTemplate =
{
{
{
HARDWARE_DEVICE_PATH,
HW_MEMMAP_DP,
{
(UINT8)(sizeof (MEMMAP_DEVICE_PATH)),
(UINT8)((sizeof (MEMMAP_DEVICE_PATH)) >> 8),
},
}, // Header
0, // StartingAddress (set at runtime)
0 // EndingAddress (set at runtime)
}, // Node1
{
END_DEVICE_PATH_TYPE,
END_ENTIRE_DEVICE_PATH_SUBTYPE,
{ sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 }
} // End
};
/**
Start an EFI Application from a Device Path
@param ParentImageHandle Handle of the calling image
@param DevicePath Location of the EFI Application
@retval EFI_SUCCESS All drivers have been connected
@retval EFI_NOT_FOUND The Linux kernel Device Path has not been found
@retval EFI_OUT_OF_RESOURCES There is not enough resource memory to store the matching results.
**/
STATIC
EFI_STATUS
StartEfiApplication (
IN EFI_HANDLE ParentImageHandle,
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
IN UINTN LoadOptionsSize,
IN VOID* LoadOptions
)
{
EFI_STATUS Status;
EFI_HANDLE ImageHandle;
EFI_LOADED_IMAGE_PROTOCOL* LoadedImage;
// Load the image from the device path with Boot Services function
Status = gBS->LoadImage (TRUE, ParentImageHandle, DevicePath, NULL, 0,
&ImageHandle);
if (EFI_ERROR (Status)) {
//
// With EFI_SECURITY_VIOLATION retval, the Image was loaded and an ImageHandle was created
// with a valid EFI_LOADED_IMAGE_PROTOCOL, but the image can not be started right now.
// If the caller doesn't have the option to defer the execution of an image, we should
// unload image for the EFI_SECURITY_VIOLATION to avoid resource leak.
//
if (Status == EFI_SECURITY_VIOLATION) {
gBS->UnloadImage (ImageHandle);
}
return Status;
}
// Passed LoadOptions to the EFI Application
if (LoadOptionsSize != 0) {
Status = gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid,
(VOID **) &LoadedImage);
if (EFI_ERROR (Status)) {
return Status;
}
LoadedImage->LoadOptionsSize = LoadOptionsSize;
LoadedImage->LoadOptions = LoadOptions;
}
// Before calling the image, enable the Watchdog Timer for the 5 Minute period
gBS->SetWatchdogTimer (5 * 60, 0x0000, 0x00, NULL);
// Start the image
Status = gBS->StartImage (ImageHandle, NULL, NULL);
// Clear the Watchdog Timer after the image returns
gBS->SetWatchdogTimer (0x0000, 0x0000, 0x0000, NULL);
return Status;
}
EFI_STATUS
BootAndroidBootImg (
IN UINTN BufferSize,
IN VOID *Buffer
)
{
EFI_STATUS Status;
CHAR8 KernelArgs[ANDROID_BOOTIMG_KERNEL_ARGS_SIZE];
VOID *Kernel;
UINTN KernelSize;
VOID *Ramdisk;
UINTN RamdiskSize;
MEMORY_DEVICE_PATH KernelDevicePath;
CHAR16 *LoadOptions, *NewLoadOptions;
Status = ParseAndroidBootImg (
Buffer,
&Kernel,
&KernelSize,
&Ramdisk,
&RamdiskSize,
KernelArgs
);
if (EFI_ERROR (Status)) {
return Status;
}
KernelDevicePath = MemoryDevicePathTemplate;
// Have to cast to UINTN before casting to EFI_PHYSICAL_ADDRESS in order to
// appease GCC.
KernelDevicePath.Node1.StartingAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) Kernel;
KernelDevicePath.Node1.EndingAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) Kernel + KernelSize;
// Initialize Linux command line
LoadOptions = CatSPrint (NULL, L"%a", KernelArgs);
if (LoadOptions == NULL) {
return EFI_OUT_OF_RESOURCES;
}
if (RamdiskSize != 0) {
NewLoadOptions = CatSPrint (LoadOptions, L" initrd=0x%x,0x%x",
(UINTN)Ramdisk, RamdiskSize);
FreePool (LoadOptions);
if (NewLoadOptions == NULL) {
return EFI_OUT_OF_RESOURCES;
}
LoadOptions = NewLoadOptions;
}
Status = StartEfiApplication (gImageHandle,
(EFI_DEVICE_PATH_PROTOCOL *) &KernelDevicePath,
StrSize (LoadOptions),
LoadOptions);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Couldn't Boot Linux: %d\n", Status));
Status = EFI_DEVICE_ERROR;
goto FreeLoadOptions;
}
// If we got here we do a confused face because BootLinuxFdt returned,
// reporting success.
DEBUG ((DEBUG_ERROR, "WARNING: BdsBootLinuxFdt returned EFI_SUCCESS.\n"));
return EFI_SUCCESS;
FreeLoadOptions:
FreePool (LoadOptions);
return Status;
}
|
