diff options
Diffstat (limited to 'OvmfPkg/QemuVideoDxe/Initialize.c')
| -rw-r--r-- | OvmfPkg/QemuVideoDxe/Initialize.c | 52 |
1 files changed, 34 insertions, 18 deletions
diff --git a/OvmfPkg/QemuVideoDxe/Initialize.c b/OvmfPkg/QemuVideoDxe/Initialize.c index af3b6af47c..80e9b3a936 100644 --- a/OvmfPkg/QemuVideoDxe/Initialize.c +++ b/OvmfPkg/QemuVideoDxe/Initialize.c @@ -200,7 +200,7 @@ QemuVideoCirrusModeSetup ( ModeData ++ ;
VideoMode ++;
}
- Private->MaxMode = QEMU_VIDEO_CIRRUS_MODE_COUNT;
+ Private->MaxMode = ModeData - Private->ModeData;
return EFI_SUCCESS;
}
@@ -222,11 +222,20 @@ QemuVideoBochsModeSetup ( QEMU_VIDEO_PRIVATE_DATA *Private
)
{
+ UINT32 AvailableFbSize;
UINT32 Index;
QEMU_VIDEO_MODE_DATA *ModeData;
QEMU_VIDEO_BOCHS_MODES *VideoMode;
//
+ // fetch available framebuffer size
+ //
+ AvailableFbSize = BochsRead (Private, VBE_DISPI_INDEX_VIDEO_MEMORY_64K);
+ AvailableFbSize *= SIZE_64KB;
+ DEBUG ((EFI_D_VERBOSE, "%a: AvailableFbSize=0x%x\n", __FUNCTION__,
+ AvailableFbSize));
+
+ //
// Setup Video Modes
//
Private->ModeData = AllocatePool (
@@ -238,25 +247,32 @@ QemuVideoBochsModeSetup ( ModeData = Private->ModeData;
VideoMode = &QemuVideoBochsModes[0];
for (Index = 0; Index < QEMU_VIDEO_BOCHS_MODE_COUNT; Index ++) {
- ModeData->InternalModeIndex = Index;
- ModeData->HorizontalResolution = VideoMode->Width;
- ModeData->VerticalResolution = VideoMode->Height;
- ModeData->ColorDepth = VideoMode->ColorDepth;
- ModeData->RefreshRate = 60;
- DEBUG ((EFI_D_INFO,
- "Adding Mode %d as Bochs Internal Mode %d: %dx%d, %d-bit, %d Hz\n",
- (INT32) (ModeData - Private->ModeData),
- ModeData->InternalModeIndex,
- ModeData->HorizontalResolution,
- ModeData->VerticalResolution,
- ModeData->ColorDepth,
- ModeData->RefreshRate
- ));
-
- ModeData ++ ;
+ UINTN RequiredFbSize;
+
+ ASSERT (VideoMode->ColorDepth % 8 == 0);
+ RequiredFbSize = (UINTN) VideoMode->Width * VideoMode->Height *
+ (VideoMode->ColorDepth / 8);
+ if (RequiredFbSize <= AvailableFbSize) {
+ ModeData->InternalModeIndex = Index;
+ ModeData->HorizontalResolution = VideoMode->Width;
+ ModeData->VerticalResolution = VideoMode->Height;
+ ModeData->ColorDepth = VideoMode->ColorDepth;
+ ModeData->RefreshRate = 60;
+ DEBUG ((EFI_D_INFO,
+ "Adding Mode %d as Bochs Internal Mode %d: %dx%d, %d-bit, %d Hz\n",
+ (INT32) (ModeData - Private->ModeData),
+ ModeData->InternalModeIndex,
+ ModeData->HorizontalResolution,
+ ModeData->VerticalResolution,
+ ModeData->ColorDepth,
+ ModeData->RefreshRate
+ ));
+
+ ModeData ++ ;
+ }
VideoMode ++;
}
- Private->MaxMode = QEMU_VIDEO_BOCHS_MODE_COUNT;
+ Private->MaxMode = ModeData - Private->ModeData;
return EFI_SUCCESS;
}
|