The OMAP2 ref timer providing a base for generic timecounting was configured
to reload at HZ similarly to the clock providing the tick interrupt at HZ.
This and the fact that the tc framework expected a full 32 bit counter range
resulted in time running ~40 times faster than normal.
Configure the ref timer as a full range counter to fix this.
- Reduce available SPL levels for hardware devices to none, vm, sched, high.
- Acquire kernel_lock only for interrupts at IPL_VM.
- Implement threaded soft interrupts.
Attached is a patch to add generic base support for systems based on the
OMAP 1 family. The devices supported in this patch are serial console
and MPU timers for OS timing purposes.
Attached is a patch to add generic base support for systems based on the
OMAP 1 family. The devices supported in this patch are serial console
and MPU timers for OS timing purposes.
This patch depends upon patches previously sent by Scott Allan: "Three
small patches for ARM" on 07/26/2006 and "Patch to add support for
ARM9E" on 07/31/2006.
A staggering number of mobile phones, PDAs, and other portable devices
are based on these systems, and OMAP would make a great addition to
NetBSD. If there are any concerns we can address or other things we can
do to get this code accepted upstream please let me know, thanks,
