[Qemu-devel] [PATCH for-1.7 0/3] sun4m: Add TCX FCode ROM and support for CG3 framebuffer

[Mark Cave-Ayland]

(This is a repost of the complete patchset rebased and with for-1.7 in the 
subject as requested by Anthony)

This patchset does two things: firstly it adds an FCode ROM for the existing
TCX framebuffer, and secondly provides QEMU with an implementation of the Sun 
CG3 8-bit framebuffer. It is based upon Bob Breuer's original work which has 
been rebased onto git master, and is now capable of running with the OpenBIOS 
CG3 FCode ROM instead of requiring copies of proprietary Sun ROMs.

Note this patch has been around for a month or so but has been waiting for the 
updated OpenBIOS images to be included in QEMU. The reason for adding the TCX 
FCode ROM first is because Open Firmware such as OpenBIOS detects which 
framebuffer is in use by "executing" the FCode in the ROM to create the node 
in the device tree in exactly the same way as real hardware. This is in 
contrast to older versions of OpenBIOS where everything was hardcoded to use 
the TCX framebuffer.

While this patch has not received much review, it is a reasonably simple and 
self-contained patchset and has been updated to reflect the comments received 
from the initial post of the "Add FCode ROM for TCX framebuffer" patch. For 
this reason, I feel that this patchset is a candidate for 1.7.

The motivation behind this patch is that older operating systems such as
Debian Woody and Solaris (running OpenWindows) do not contain drivers for the
TCX framebuffer and as a result currently cannot run in graphical mode. The
screenshots linked below show qemu-system-sparc successfully running both 
Debian Woody and the Solaris 8 installer in graphical mode with the CG3 
framebuffer selected during testing:

http://www.ilande.co.uk/tmp/debian-woody.png
http://www.ilande.co.uk/tmp/sol8-1.png
http://www.ilande.co.uk/tmp/sol8-2.png

The CG3 framebuffer is selected by passing -vga cg3 on the command line to
qemu-system-sparc. If either -vga tcx is specified (or the -vga argument is
omitted) then qemu-system-sparc defaults to using the existing TCX
framebuffer to maintain compatibility.

Signed-off-by: Mark Cave-Ayland <address@hidden>

Mark Cave-Ayland (3):
  sun4m: Add FCode ROM for TCX framebuffer
  sun4m: Add Sun CG3 framebuffer and corresponding OpenBIOS FCode ROM
  sun4m: Add Sun CG3 framebuffer initialisation function

 Makefile                          |    2 +-
 default-configs/sparc-softmmu.mak |    1 +
 hw/display/Makefile.objs          |    1 +
 hw/display/cg3.c                  |  359 +++++++++++++++++++++++++++++++++++++
 hw/display/tcx.c                  |   27 ++-
 hw/sparc/sun4m.c                  |   77 +++++++-
 include/sysemu/sysemu.h           |    1 +
 pc-bios/QEMU,cgthree.bin          |  Bin 0 -> 682 bytes
 pc-bios/QEMU,tcx.bin              |  Bin 0 -> 1242 bytes
 pc-bios/README                    |    4 +-
 vl.c                              |   24 +++
 11 files changed, 483 insertions(+), 13 deletions(-)
 create mode 100644 hw/display/cg3.c
 create mode 100644 pc-bios/QEMU,cgthree.bin
 create mode 100644 pc-bios/QEMU,tcx.bin

-- 
1.7.10.4