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
|
#include <efi.h>
#include <efilib.h>
extern EFI_GUID GraphicsOutputProtocol;
static void
print_modes(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop)
{
int i, imax;
EFI_STATUS rc;
if (gop->Mode) {
imax = gop->Mode->MaxMode;
Print(L"GOP reports MaxMode %d\n", imax);
} else {
Print(L"gop->Mode is NULL\n");
imax = 1;
}
for (i = 0; i < imax; i++) {
EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
UINTN SizeOfInfo;
rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i, &SizeOfInfo,
&info);
if (EFI_ERROR(rc) && rc == EFI_NOT_STARTED) {
Print(L"gop->QueryMode() returned %r\n", rc);
Print(L"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(L"%d: Bad response from QueryMode: %r (%d)\n",
i, rc, rc);
continue;
}
Print(L"%c%d: %dx%d ",
(gop->Mode &&
CompareMem(info,gop->Mode->Info,sizeof(*info)) == 0
) ? '*' : ' ',
i, info->HorizontalResolution, info->VerticalResolution);
switch(info->PixelFormat) {
case PixelRedGreenBlueReserved8BitPerColor:
Print(L"RGBR");
break;
case PixelBlueGreenRedReserved8BitPerColor:
Print(L"BGRR");
break;
case PixelBitMask:
Print(L"R:%08x G:%08x B:%08x X:%08x",
info->PixelInformation.RedMask,
info->PixelInformation.GreenMask,
info->PixelInformation.BlueMask,
info->PixelInformation.ReservedMask);
break;
case PixelBltOnly:
Print(L"(blt only)");
break;
default:
Print(L"(Invalid pixel format)");
break;
}
Print(L" pitch %d\n", info->PixelsPerScanLine);
}
}
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(L"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(L"Could not locate GOP: %r\n", rc);
return rc;
}
if (!gop) {
Print(L"LocateProtocol(GOP, &gop) returned %r but GOP is NULL\n", rc);
return EFI_UNSUPPORTED;
}
print_modes(gop);
SetWatchdog(0);
return EFI_SUCCESS;
}
|
