[PATCH v2 00/12] mos6522: switch to gpios, add control line edge-triggering and extra debugging

[Mark Cave-Ayland]

Here is another patchset taken from my series to enable MacOS to boot on the 
q800
machine.

Patches 1-3 define the IFR bit flags in terms of the physical control lines and
update mac_via to use them.

Patch 4 does the main switch from custom methods in MOS6522DeviceClass to using
standard gpios whilst patch 5 removes these now-obsolete methods.

Patch 6 updates mos6522 instances to use the recommended method of calling
device_class_set_parent_reset() to propagate the device reset to the parent.

Patches 7 and 8 add more support for debugging guests using the mos6522 devices
by adding register names into the trace-event output and implementing a new
"info via" HMP command to give detailed information about the registers and 
timer
states.

Patch 9 introduces a new last_irq_levels field within MOS6522State to enable 
detection
of edge transitions, which is also a migration break for the q800 and 
g3beige/mac99
machines.

Patch 10 ensures that the SCSI_DATA (DRQ) bit in VIA2 is unlatched since in the 
q800
machine VIA2 is integrated within the on-board logic, and analysis of the MacOS
toolbox ROM suggests that the DRQ bit is expected to be live compared with older
Macs which use a real (latched) VIA.

Patches 11 implement edge-triggering for the CA1/2 and CB1/2 control lines as
documented in the datasheet, including updating the relevant inputs for negative
edge-triggering if required.

Finally patch 12 removes some old code in the PMU mos6522 instance which is now 
no
longer required with these latest changes.

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

v2:
- Update patches 1-3 to use the BIT() macro
- Add R-B tags from Peter
- Update "info via" patch to use a target-specific HMP command as discussed 
on-list
- Add patch 10 "mac_via: make SCSI_DATA (DRQ) bit live rather than latched"


Mark Cave-Ayland (12):
  mos6522: add defines for IFR bit flags
  mac_via: use IFR bit flag constants for VIA1 IRQs
  mac_via: use IFR bit flag constants for VIA2 IRQs
  mos6522: switch over to use qdev gpios for IRQs
  mos6522: remove update_irq() and set_sr_int() methods from
    MOS6522DeviceClass
  mos6522: use device_class_set_parent_reset() to propagate reset to
    parent
  mos6522: add register names to register read/write trace events
  mos6522: add "info via" HMP command for debugging
  mos6522: record last_irq_levels in mos6522_set_irq()
  mac_via: make SCSI_DATA (DRQ) bit live rather than latched
  mos6522: implement edge-triggering for CA1/2 and CB1/2 control line
    IRQs
  macio/pmu.c: remove redundant code

 hmp-commands-info.hx         |  15 +++
 hw/m68k/q800.c               |   9 +-
 hw/misc/mac_via.c            |  87 ++++++--------
 hw/misc/macio/cuda.c         |   8 +-
 hw/misc/macio/pmu.c          |  40 +------
 hw/misc/mos6522.c            | 223 ++++++++++++++++++++++++++++++++---
 hw/misc/trace-events         |   4 +-
 include/hw/misc/mac_via.h    |  46 ++++----
 include/hw/misc/macio/pmu.h  |   2 -
 include/hw/misc/mos6522.h    |  44 +++++--
 include/monitor/hmp-target.h |   1 +
 11 files changed, 333 insertions(+), 146 deletions(-)

-- 
2.20.1