linux-toradex.git/arch/parisc/kernel/time.c, branch v3.1.2

parisc: Switch do_timer() to xtime_update()

2011-01-31T13:55:46+00:00

xtime_update() takes the xtime_lock itself.

Signed-off-by: Torben Hohn 
Cc: hch@infradead.org
Cc: Peter Zijlstra 
Cc: johnstul@us.ibm.com
Cc: Helge Deller 
Cc: "James E.J. Bottomley" 
Cc: Kyle McMartin 
Cc: yong.zhang0@gmail.com
LKML-Reference: <20110127150017.23248.22559.stgit@localhost>
Signed-off-by: Thomas Gleixner

parisc: Convert to read/update_persistent_clock

2010-03-06T22:54:10+00:00

This patch converts the parisc architecture to use the generic
read_persistent_clock and update_persistent_clock interfaces, reducing
the amount of arch specific code we have to maintain, and allowing for
further cleanups in the future.

I have not built or tested this patch, so help from arch maintainers
would be appreciated.

Signed-off-by: John Stultz 
Acked-by: Helge Deller 
Signed-off-by: Kyle McMartin

parisc: fix "delay!" timer handling

2009-07-03T03:34:09+00:00

Rewrote timer_interrupt() to properly handle the "delayed!" case.

If we used floating point math to compute the number of ticks that had
elapsed since the last timer interrupt, it could take up to 12K cycles
(emperical!) to handle the interrupt. Existing code assumed it would
never take more than 8k cycles. We end up programming Interval Timer
to a value less than "current" cycle counter.  Thus have to wait until
Interval Timer "wrapped" and would then get the "delayed!" printk that
I moved below.

Since we don't really know what the upper limit is, I prefer to read
CR16 again after we've programmed it to make sure we won't have to
wait for CR16 to wrap.

Further, the printk was between reading CR16 (cycle couner) and writing CR16
(the interval timer). This would cause us to continue to set the interval
timer to a value that was "behind" the cycle counter. Rinse and repeat.
So no printk's between reading CR16 and setting next interval timer.

Tested on A500 (550 Mhz PA8600).

Signed-off-by: Grant Grundler 
Tested-by: Kyle McMartin 
Signed-off-by: Kyle McMartin 

----
Kyle, Helge, and other parisc's,
Please test on 32-bit before committing.
I think I have it right but recognize I might not.

TODO: I wanted to use "do_div()" in order to get both remainder
and value back with one division op. That should help with the
latency alot but can be applied seperately from this patch.

thanks,
grant

parisc: add parameter to read_cr16()

2009-07-03T03:34:08+00:00

This patch modifies parameter of au1x_counter1_read() from 'void' to 'struct
clocksource *cs', which fixes compile warning for incompatible parameter type.

Signed-off-by: Coly Li 
Signed-off-by: Helge Deller 
Cc: Ingo Molnar 
Signed-off-by: Kyle McMartin

Merge git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6

2009-04-03T16:52:04+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6: (23 commits)
  parisc: move dereference_function_descriptor to process.c
  parisc: Move kernel Elf_Fdesc define to 
  parisc: fix build when ARCH_HAS_KMAP
  parisc: fix "make tar-pkg"
  parisc: drivers: fix warnings
  parisc: select BUG always
  parisc: asm/pdc.h should include asm/page.h
  parisc: led: remove proc_dir_entry::owner
  parisc: fix macro expansion in atomic.h
  parisc: iosapic: fix build breakage
  parisc: oops_enter()/oops_exit() in die()
  parisc: document light weight syscall ABI
  parisc: blink all or loadavg LEDs on oops
  parisc: add ftrace (function and graph tracer) functionality
  parisc: simplify sys_clone()
  parisc: add LATENCYTOP_SUPPORT and CONFIG_STACKTRACE_SUPPORT
  parisc: allow to build with 16k default kernel page size
  parisc: expose 32/64-bit capabilities in cpuinfo
  parisc: use constants instead of numbers in assembly
  parisc: fix usage of 32bit PTE page table entries on 32bit kernels
  ...

parisc: rtc: Rename rtc-parisc to rtc-generic

2009-04-02T01:05:31+00:00

The rtc-parisc driver is not PA-RISC specific at all, as it uses the existing
(but deprecated) generic RTC infrastructure ([gs]et_rtc_time()).
Rename the driver from rtc-parisc to rtc-generic.

Signed-off-by: Geert Uytterhoeven 
Acked-by: Alessandro Zummo 
Signed-off-by: Kyle McMartin

rtc-parisc: remove unnecessary ret variable

2009-04-01T15:59:25+00:00

Signed-off-by: dann frazier 
Cc: Alessandro Zummo 
Cc: Kyle McMartin 
Cc: Grant Grundler 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc-parisc: declare rtc_parisc_dev as static

2009-04-01T15:59:25+00:00

Signed-off-by: dann frazier 
Cc: Alessandro Zummo 
Cc: Kyle McMartin 
Cc: Grant Grundler 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

parisc: add ftrace (function and graph tracer) functionality

2009-03-31T02:51:34+00:00

This patch adds the ftrace debugging functionality to the parisc kernel.
It will currently only work with 64bit kernels, because the gcc options -pg
and -ffunction-sections can't be enabled at the same time and -ffunction-sections
is still needed to be able to link 32bit kernels.

Signed-off-by: Helge Deller 
Signed-off-by: Kyle McMartin

parisc: Replace NR_CPUS in parisc code

2009-01-05T19:09:02+00:00

parisc: Replace most arrays sized by NR_CPUS with percpu variables.

Signed-off-by: Helge Deller 
Signed-off-by: Kyle McMartin