aboutsummaryrefslogtreecommitdiff
path: root/hw
AgeCommit message (Collapse)Author
2009-03-16Delete some unused macros detected with -Wp,-Wunused-macros useblueswir1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6856 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-13temporarily disable logging around pci config writes (Avi Kivity)aliguori
A pci config write may remap the vga linear frame buffer, confusing the memory slot dirty logging logic. Fixed Windows with -vga std. Signed-off-by: Avi Kivity <avi@redhat.com> Sigend-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6852 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-13stop dirty logging while updating cirrus bank memory (Glauber Costa)aliguori
Otherwise, slot tracking gets confused. This fixes a screen corruption bug with Ubuntu guest installation. Signed-off-by: Glauber Costa <glommer@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6851 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-13Add missing filealiguori
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6850 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-13qemu:virtio-net: Check return size on the correct sg list (Alex Williamson)aliguori
When checking that the size of the control virtqueue return field is sufficient, use the correct sg list. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6845 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-13Add and use remaining #defines for PCI device IDs (Stuart Brady)aliguori
This patch adds and uses #defines for the remaining hardcoded PCI device IDs. It also moves definitions taken from linux/pci_ids.h into a separate header (hw/pci_ids.h), removes the 'RTL' from PCI_DEVICE_ID_REALTEK_RTL8029, and renames PCI_DEVICE_ID_FSL_E500 to PCI_DEVICE_ID_MPC8533E to match Linux's definition. Changes in v2: * Don't use C99-style comments * Move definitions from linux/pci_ids.h into a separate header * Rename PCI_DEVICE_ID_FSL_E500 to PCI_DEVICE_ID_MPC8533E Signed-off-by: Stuart Brady <stuart.brady@gmail.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6841 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-13remove is_graphic_console from vga.c (Stefano Stabellini)aliguori
Hi all, since vga_draw_graphic is only called by vga_hw_update when the console associated with the graphic card is active, we don't need to check if the current console is active using is_graphic_console. I suspect I introduced these checks when the console switching mechanism didn't work as it does now. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6840 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-13DisplayAllocator interface (Stefano Stabellini)aliguori
Hi all, this patch adds a DisplayAllocator interface that allows display frontends (sdl in particular) to provide a preallocated display buffer for the graphical backend to use. Whenever a graphical backend cannot use qemu_create_displaysurface_from because its own internal pixel format cannot be exported directly (text mode or graphical mode with color depth 8 or 24), it creates another display buffer in memory using qemu_create_displaysurface and does the conversion. This new buffer needs to be blitted into the sdl surface buffer every time we need to update portions of the screen. We can avoid this using the DisplayAllocator interace: sdl provides its own implementation of qemu_create_displaysurface, giving back the sdl surface buffer directly (as we used to do before the DisplayState changes). Since the buffer returned by sdl could be in bgr format we need to put back in the handlers of that case. This approach is good if the two following conditions are true: 1) the sdl surface is a software surface that resides in main memory; 2) the host display color depth is either 16 or 32 bpp. If first condition is false we can have bad performances using sdl and vnc together. If the second condition is false performances are certainly not going to improve but they shouldn't get worse either. The first condition is always true, at least on linux/X11 systems; but I believe is true also on other platforms. The second condition is true in the vast majority of the cases. This patch should also have the good side effect of solving the sdl 2D slowness malc was reporting on MacOS, because SDL_BlitSurface is not going to be called anymore when the guest is in text mode or 24bpp. However the root problem is still present so I suspect we may still see some slowness on MacOS when the guest is in 32 or 16 bpp. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6839 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-12From 67e94ae77f8de4d5d822917f1723cefa7ebfb64d Mon Sep 17 00:00:00 2001aliguori
From: Xiantao Zhang <xiantao.zhang@intel.com> Date: Tue, 3 Mar 2009 13:33:13 +0800 Subject: [PATCH] Split ioapic logic from the current apic. Add a new ioapic.c to hold ioapic's logic, and also make it work for ia64. Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> --- Makefile.target | 2 +- hw/apic.c | 237 +++---------------------------------------------- hw/ioapic.c | 263 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ hw/pc.h | 5 +- 4 files changed, 281 insertions(+), 226 deletions(-) create mode 100644 hw/ioapic.c git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6827 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-12Add specialized block driver scsi generic API (Avi Kivity)aliguori
When a scsi device is backed by a scsi generic device instead of an ordinary host block device, the block API is abused in a couple of annoying ways: - nb_sectors is negative, and specifies a byte count instead of a sector count - offset is ignored, since scsi-generic is essentially a packet protocol This overloading makes hacking the block layer difficult. Remove it by introducing a new explicit API for scsi-generic devices. The new API is still backed by the old implementation, but at least the users are insulated. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6822 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-10Clean build: Add bt-host.haurel32
Silence compiler warning by providing proper CONFIG_BLUEZ-independent header for the bt-host API. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6809 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-10musicpal: Reorganize IO memory handling (Jan Kiszka)malc
The new MMIO interface requires non-overlapping slots. Reorganize the musicpal accordingly, fixing a regression for the Ethernet emulation. Signed-off-by: Jan Kiszka <jan.kiszka@web.de> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6803 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-08Use firmware configuration instead of NVRAM (initial patch by Aurelien Jarno)blueswir1
Use firmware configuration device for boot device, kernel, initrd and kernel command line parameters on PPC, Sparc32 and Sparc64. Update OpenBIOS images to r479 which supports the change. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6777 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-08Add new entries to firmware configuration deviceblueswir1
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6776 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07do not pretend to support low voltage operationaurel32
Eliminate "mmc0: SD card claims to support the incompletely defined 'low voltage range'. This will be ignored." warning. Qemu says the card is a SD card, and SD spec doesn't define low-voltage cards, so do now pretend to be one. Signed-off-by: Riku Voipio <riku.voipio@iki.fi> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6772 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07clean build: Fix arm build warningsaurel32
Fix remaining arm warnings - except for the mess in the NetWinder FP emulator. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6766 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07arm: Fix gic_irq_state.level bitfield typeaurel32
Found while cleaning up compiler warnings: GIC_*_LEVEL macros strongly suggest that gic_irq_state.level is intended to be per-CPU and not just a single, global bit. I'm unable to test the effect, but it seems to be the most reasonable fix for the apparent brokenness. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6765 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07ppc_oldworld: swap the MACIO and CMD646 IDE controllersaurel32
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6763 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07Use a dedicated function to request exit from execution loopaurel32
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6762 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07Activate uninorth AGP bridgeblueswir1
Linux tries to poke the AGP bridge port and is pretty sad when it can't, so let's activate the old code again and throw out the bit modifications, as we don't really do anything with the values anyways. Signed-off-by: Alexander Graf <alex@csgraf.de> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6750 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07Sparse fixes: dubious mixing of bitwise and logical operationsblueswir1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6741 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07Sparse fixes: move ACPI table definitions to pc.hblueswir1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6738 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07Sparse fixes: truncation by castblueswir1
Fix Sparse warnings about constant truncation caused by cast git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6737 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07Sparse fixes: NULL use, header order, ANSI prototypes, staticblueswir1
Fix Sparse warnings: * use NULL instead of plain 0 * rearrange header include order to avoid redefining types accidentally * ANSIfy SLIRP * avoid "restrict" keyword * add static git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6736 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-07Fix sparc64-softmmu breakage from r6711blueswir1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6733 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-05monitor: Rework API (Jan Kiszka)aliguori
Refactor the monitor API and prepare it for decoupled terminals: term_print functions are renamed to monitor_* and all monitor services gain a new parameter (mon) that will once refer to the monitor instance the output is supposed to appear on. However, the argument remains unused for now. All monitor command callbacks are also extended by a mon parameter so that command handlers are able to pass an appropriate reference to monitor output services. For the case that monitor outputs so far happen without clearly identifiable context, the global variable cur_mon is introduced that shall once provide a pointer either to the current active monitor (while processing commands) or to the default one. On the mid or long term, those use case will be obsoleted so that this variable can be removed again. Due to the broad usage of the monitor interface, this patch mostly deals with converting users of the monitor API. A few of them are already extended to pass 'mon' from the command handler further down to internal functions that invoke monitor_printf. At this chance, monitor-related prototypes are moved from console.h to a new monitor.h. The same is done for the readline API. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6711 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-05monitor: Rework modal password input (Jan Kiszka)aliguori
Currently, waiting for the user to type in some password blocks the whole VM because monitor_readline starts its own I/O loop. And this loop also screws up reading passwords from virtual console. Patch below fixes the shortcomings by using normal I/O processing also for waiting on a password. To keep to modal property for the monitor terminal, the command handler is temporarily replaced by a password handler and a callback infrastructure is established to process the result before switching back to command mode. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6710 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-05monitor: Rework early disk password inquiry (Jan Kiszka)aliguori
Reading the passwords for encrypted hard disks during early startup is broken (I guess for quiet a while now): - No monitor terminal is ready for input at this point - Forcing all mux'ed terminals into monitor mode can confuse other users of that channels To overcome these issues and to lay the ground for a clean decoupling of monitor terminals, this patch changes the initial password inquiry as follows: - Prevent autostart if there is some encrypted disk - Once the user tries to resume the VM, prompt for all missing passwords - Only resume if all passwords were accepted Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6707 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-05lsi: add ISTAT1 register read (Ryan Harper)aliguori
SLES10 SP2 installer complains when probing a scsi disk and exits qemu when failing to read one of the registers. lsi_scsi: error: readb 0x15 -- Ryan Harper Software Engineer; Linux Technology Center IBM Corp., Austin, Tx ryanh@us.ibm.com diffstat output: lsi53c895a.c | 2 ++ 1 files changed, 2 insertions(+) Signed-off-by: Ryan Harper <ryanh@us.ibm.com> --- Subject: [PATCH] lsi: add ISTAT1 register read From: Ryan Harper <ryanh@us.ibm.com> Cc: kvm@vger.kernel.org SLES10 SP2 installer complains when probing a scsi disk and exits qemu when failing to read one of the registers. lsi_scsi: error: readb 0x15 Signed-off-by: Ryan Harper <ryanh@us.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6688 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-04DB-DMA IDE asynchronous I/Oaurel32
Signed-off-by: Laurent Vivier <Laurent@vivier.eu> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6681 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-03Fix slavio_intctl.c compile errors (Robert Reif)blueswir1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6680 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-03DB-DMA cleanupaurel32
Signed-off-by: Laurent Vivier <Laurent@vivier.eu> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6676 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-03sh4: r2d fix no ide/net caseaurel32
Fix invalid access/crash when there is no IDE device or NET device. Signed-off-by: Takashi YOSHII <takasi-y@ops.dti.ne.jp> Tested-by: Shin-ichiro KAWASAKI <kawasaki@juno.dti.ne.jp> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6673 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-03clean build: Fix remaining sh4 warningsaurel32
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6668 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-02kvm/powerpc: Add MPC8544DS board supportaurel32
This patch add an emulation of MPC8544DS board. It can work on All E500 platforms. Signed-off-by: Liu Yu <yu.liu@freescale.com> Acked-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6663 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-02kvm/powerpc: Add irq support for E500 coreaurel32
Signed-off-by: Liu Yu <yu.liu@freescale.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6662 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-02kvm/powerpc: Add freescale pci controller's supportaurel32
This patch add the emulation of freescale's pci controller for MPC85xx platform. Signed-off-by: Liu Yu <yu.liu@freescale.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6661 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-02hw/openpic: define list in mpic_init() constaurel32
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6660 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-02kvm/powerpc: Enable MPIC for E500 platform.aurel32
MPIC and OpenPIC have very similar design. So a lot of code can be reused. Signed-off-by: Liu Yu <yu.liu@freescale.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6659 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-27Remove some warnings and fix windows build.aliguori
Initialize some variables to make GCC happy and switch from using index to strchr. index is not available on Windows. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6653 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-27Allow additions of ACPI tables from command line (Gleb Natapov)aliguori
This is needed to dynamically add SLIC tables with Windows activation keys. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6650 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-27Missing cirrus_invalidate_region() in cirrus_do_copy() (Brian Kress)aliguori
After doing a video to video copy, cirrus_do_copy() in cirrus_vga.c does a conditional call to cirrus_invalidate_region() with an "if (!notify)" test. However at this point the blt has already been done so it seems like this call should be made unconditionally. The patch below fixes some display update problems when dragging windows under both X (fedora 10 guest) and a Windows XP guest. Signed-off-by: Brian Kress <kressb@moose.net> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6646 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-26fix pci net hot-remove (Marcelo Tosatti)aliguori
Missing brackets, doh. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6645 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-22CRIS: Fix remaining build warnings.edgar_igl
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6638 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-21Reload ptimers on resetblueswir1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6635 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-16virtio: Remove malloc failure checks (Jan Kiszka)aliguori
No need to check for failing qemu_malloc anymore. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6626 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-16Generate PCI hotplug interrupt only if corespondent EN bit is set. (Gleb ↵aliguori
Natapov) Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6625 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-16Fix GPE registers read/write handling. (Gleb Natapov)aliguori
For STS register bit are cleared by writing 1 into it. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6624 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-16Fix hardware accelerated video to video copy on Cirrus VGA (Brian Kress)aliguori
cirrus_do_copy() in hw/cirrus_vga.c seems to make some incorrect assumptions about video memory layout. It tries to convert addresses to coordinates assuming that one row of data is (width * depth) bytes long. The correct way seems to be to use the pitch fields in the CirrusVGAState structure instead. Without this patch, I get lots of screen corruption when I try to drag a window under X as it's passing the wrong coordinates to the display surface for the copy. With this patch I can drag a window with no screen corruption. Signed-off-by: Brian Kress <kressb@moose.net> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6622 c046a42c-6fe2-441c-8c8c-71466251a162
2009-02-12Fix Sparc64 VGA memory size bug exposed by r6604blueswir1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6618 c046a42c-6fe2-441c-8c8c-71466251a162