[issue995] DFly doesnt work on Vmware and Virtualbox

[Antonio Huete Jimenez <sinknull@xxxxxxxxxxxxxxxxxxxxxxx>]

Antonio Huete Jimenez <tuxillo@quantumachine.net> added the comment:

We've been doing some investigation with Virtual Box OSE 1.6.1 (trunk version)
and thanks to selective logging (that's how vbox developers call it) I've tried
to booted DF (from 1.12.1 LiveCD without ACPI) and collected some information
about PIT. 

You can find it at:
http://leaf.dragonflybsd.org/~tuxillo/bugs/995/

As it's an early boot stage so kprintf() will show nothing (console not
initalized). 

I've observed that latched count comes from 0xffff and reaches 0x0001

  pit_latch_count: latched_count=0x0003 / 0054922886 ns (c=0x10000 m=2) 
  pit_latch_count: latched_count=0x0002 / 0054923724 ns (c=0x10000 m=2)
  pit_latch_count: latched_count=0x0002 / 0054923724 ns (c=0x10000 m=2)
  pit_latch_count: latched_count=0x0002 / 0054923724 ns (c=0x10000 m=2)
  pit_latch_count: latched_count=0x0002 / 0054923724 ns (c=0x10000 m=2)
  pit_latch_count: latched_count=0x0001 / 0054924563 ns (c=0x10000 m=2) 

- In FreeBSD (7.0 without ACPI) I don't see any pit latches.

As I "have no clue" I would wait for hackers' comments :))

Regards,
Antonio Huete

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DragonFly issue tracker <bugs@lists.dragonflybsd.org>
<https://bugs.dragonflybsd.org/issue995>
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