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
179
180
181
182
183
184
185
186
187
188
|
#include <efi.h>
#include <efilib.h>
extern EFI_GUID GraphicsOutputProtocol;
#ifdef _MSC_VER
#if defined(_M_X64) || defined (_M_ARM64)
#define __SIZEOF_POINTER__ 8
#elif defined(_M_IX86) || defined(_M_ARM)
#define __SIZEOF_POINTER__ 4
#else
#error "Unknown arch"
#endif
#endif
#ifdef __GNUC__
#define be32_to_cpu(x) __builtin_bswap32(x)
#else
static inline UINT32 be32_to_cpu(const UINT32 x) {
return ((x >> 24) & 0x000000FFUL) | ((x << 24) & 0xFF000000UL) |
((x >> 8) & 0x0000FF00UL) | ((x << 8) & 0x00FF0000UL);
}
#endif
static void
fill_boxes(UINT32 *PixelBuffer, UINT32 Width, UINT32 Height, UINT32 Pitch,
EFI_GRAPHICS_PIXEL_FORMAT Format, EFI_PIXEL_BITMASK Info )
{
UINT32 Red, Green;
UINT32 y, x, color;
switch(Format) {
case PixelRedGreenBlueReserved8BitPerColor:
Red = be32_to_cpu(0xff000000);
Green = be32_to_cpu(0x00ff0000);
break;
case PixelBlueGreenRedReserved8BitPerColor:
Red = be32_to_cpu(0x0000ff00);
Green = be32_to_cpu(0x00ff0000);
break;
case PixelBitMask:
Red = Info.RedMask;
Green = Info.GreenMask;
break;
case PixelBltOnly:
return;
default:
Print(u"Invalid pixel format\n");
return;
}
for (y = 0; y < Height; y++) {
color = ((y / 32) % 2 == 0) ? Red : Green;
for (x = 0; x < Width; x++) {
if (x % 32 == 0 && x != 0)
color = (color == Red) ? Green : Red;
PixelBuffer[y * Pitch + x] = color;
}
}
}
static void
draw_boxes(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop)
{
int i, imax;
EFI_STATUS rc;
EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
UINTN NumPixels;
UINT32 *PixelBuffer;
UINT32 CopySize, BufferSize;
#if __SIZEOF_POINTER__ == 8
UINT64 FrameBufferAddr;
#elif __SIZEOF_POINTER__ == 4
UINT32 FrameBufferAddr;
#else
#error YOUR ARCH HERE
#endif
if (gop->Mode) {
imax = gop->Mode->MaxMode;
} else {
Print(u"gop->Mode is NULL\n");
return;
}
for (i = 0; i < imax; i++) {
UINTN SizeOfInfo;
rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i, &SizeOfInfo,
&info);
if (rc == EFI_NOT_STARTED) {
Print(u"gop->QueryMode() returned %r\n", rc);
Print(u"Trying to start GOP with SetMode().\n");
rc = uefi_call_wrapper(gop->SetMode, 2, gop,
gop->Mode ? gop->Mode->Mode : 0);
rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i,
&SizeOfInfo, &info);
}
if (EFI_ERROR(rc)) {
Print(u"%d: Bad response from QueryMode: %r (%d)\n",
i, rc, rc);
continue;
}
if (CompareMem(info, gop->Mode->Info, sizeof (*info)))
continue;
NumPixels = (UINTN)info->VerticalResolution
* (UINTN)info->PixelsPerScanLine;
BufferSize = (UINT32)(NumPixels * sizeof(UINT32));
if (BufferSize == gop->Mode->FrameBufferSize) {
CopySize = BufferSize;
} else {
CopySize = BufferSize < gop->Mode->FrameBufferSize ?
BufferSize : (UINT32)gop->Mode->FrameBufferSize;
Print(u"height * pitch * pixelsize = %lu buf fb size is %lu; using %lu\n",
BufferSize, gop->Mode->FrameBufferSize, CopySize);
}
PixelBuffer = AllocatePool(BufferSize);
if (!PixelBuffer) {
Print(u"Allocation of 0x%08lx bytes failed.\n",
sizeof(UINT32) * NumPixels);
return;
}
fill_boxes(PixelBuffer, info->HorizontalResolution,
info->VerticalResolution, info->PixelsPerScanLine,
info->PixelFormat, info->PixelInformation);
if (info->PixelFormat == PixelBltOnly) {
Print(u"No linear framebuffer on this device.\n");
return;
}
#if __SIZEOF_POINTER__ == 8
FrameBufferAddr = (UINT64)gop->Mode->FrameBufferBase;
#elif __SIZEOF_POINTER__ == 4
FrameBufferAddr = (UINT32)(UINT64)gop->Mode->FrameBufferBase;
#else
#error YOUR ARCH HERE
#endif
CopyMem((VOID *)FrameBufferAddr, PixelBuffer, CopySize);
return;
}
Print(u"Never found the active video mode?\n");
}
static EFI_STATUS
SetWatchdog(UINTN seconds)
{
EFI_STATUS rc;
rc = uefi_call_wrapper(BS->SetWatchdogTimer, 4, seconds, 0x1ffff,
0, NULL);
if (EFI_ERROR(rc)) {
CHAR16 Buffer[64];
StatusToString(Buffer, rc);
Print(u"Bad response from QueryMode: %s (%d)\n", Buffer, rc);
}
return rc;
}
EFI_STATUS
efi_main (EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *systab)
{
EFI_STATUS rc;
EFI_GRAPHICS_OUTPUT_PROTOCOL *gop;
InitializeLib(image_handle, systab);
SetWatchdog(10);
rc = LibLocateProtocol(&GraphicsOutputProtocol, (void **)&gop);
if (EFI_ERROR(rc)) {
Print(u"Could not locate GOP: %r\n", rc);
return rc;
}
if (!gop) {
Print(u"LocateProtocol(GOP, &gop) returned %r but GOP is NULL\n", rc);
return EFI_UNSUPPORTED;
}
draw_boxes(gop);
SetWatchdog(0);
return EFI_SUCCESS;
}
|
