[PATCH 00/12] macfb: fixes for booting MacOS

[Mark Cave-Ayland]

This is the next set of patches to allow users to boot MacOS in QEMU's
q800 machine.

Patches 1 to 3 are fixes for existing bugs that I discovered whilst
developing the remainder of the patchset whilst patch 4 simplifies the
registration of the framebuffer RAM.

Patch 5 adds trace events to the framebuffer register accesses. The
framebuffer registers are not officially documented, so the macfb
device changes here are based upon reading of Linux/NetBSD source code,
using gdbstub during the MacOS toolbox ROM initialisation, and changing
the framebuffer size/depth within MacOS itself with these trace events
enabled.

Patches 6 and 7 implement the mode sense logic documented in Apple
Technical Note HW26 "Macintosh Quadra Built-In Video" and configure the
default display type to be VGA.

Patch 8 implements the common monitor modes used for VGA at 640x480 and
800x600 for 1, 2, 4, 8 and 24-bit depths and also the Apple 21" color
monitor at 1152x870 with 8-bit depth.

Patches 9 and 10 fix up errors in the 1-bit and 24-bit pixel encodings
discovered when testing these color depths in MacOS.

Patch 11 adds a timer to implement the 60.15Hz VBL interrupt which is
required for MacOS to process mouse movements, whilst patch 12 wires the
same interrupt to a dedicated pin on VIA2 reserved for the video
interrupt on the Quadra 800.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>


Mark Cave-Ayland (12):
  macfb: handle errors that occur during realize
  macfb: fix invalid object reference in macfb_common_realize()
  macfb: fix overflow of color_palette array
  macfb: use memory_region_init_ram() in macfb_common_realize() for the
    framebuffer
  macfb: add trace events for reading and writing the control registers
  macfb: implement mode sense to allow display type to be detected
  macfb: add qdev property to specify display type
  macfb: add common monitor modes supported by the MacOS toolbox ROM
  macfb: fix up 1-bit pixel encoding
  macfb: fix 24-bit RGB pixel encoding
  macfb: add vertical blank interrupt
  q800: wire macfb IRQ to separate video interrupt on VIA2

 hw/display/macfb.c         | 348 +++++++++++++++++++++++++++++++++++--
 hw/display/trace-events    |   7 +
 hw/m68k/q800.c             |  23 ++-
 include/hw/display/macfb.h |  43 +++++
 4 files changed, 397 insertions(+), 24 deletions(-)

-- 
2.20.1