linux-toradex.git/arch/parisc/kernel/time.c, branch v2.6.19.2

[PARISC] More pt_regs removal

2006-10-07T12:01:11+00:00

Remove pt_regs from ipi_interrupt and timer_interrupt.
Inline smp_do_timer() into its only caller, and unify the SMP and
non-SMP paths.  Fixes a profiling bug.

Signed-off-by: Matthew Wilcox

[PARISC] Make firmware calls irqsafe-ish...

2006-10-07T11:21:03+00:00

There's no reason why we shouldn't be using _irqsave instead of
_irq for any of these calls. fwiw, this fixes the
"start_kernel(): bug: interrupts were enabled early" message displayed
on bootup recently.

Signed-off-by: Kyle McMartin 
Signed-off-by: Matthew Wilcox

Build fixes for struct pt_regs removal

2006-10-07T02:47:23+00:00

Signed-off-by: Matthew Wilcox

[PA-RISC] Fix time.c for new do_timer() calling convention

2006-10-05T01:48:18+00:00

do_timer now wants to know how many ticks have elapsed.  Now that we
have to calculate that, we can eliminate some of the clever code that
avoided having to calculate that.  Also add some more documentation.
I'd like to thank Grant Grundler for helping me with this.

Signed-off-by: Matthew Wilcox

[PARISC] Kill wall_jiffies use

2006-10-04T12:51:45+00:00

wall_jiffies and jiffies are now equal, so this is a noop...

Signed-off-by: Andrew Morton 
Signed-off-by: Kyle McMartin

[PARISC] Further updates to timer_interrupt()

2006-10-04T12:48:48+00:00

This version (relative to the current tree):
o eliminates "while (ticks_elapsed)" loop. It's not needed.
o drop "ticks_elapsed" completely from timer_interrupt().
o Estimates elapsed cycles (based on HZ) to see which kind of
  math we want to use to calculate "cycles_remainder".
o Fixes a bug where we would loose a tick if we decided
  we wanted to skip one interrupt.

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

[PARISC] remove halftick and copy clocktick to local var (gcc can optimize usage)

2006-10-04T12:48:38+00:00

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

[PARISC] Rewrite timer_interrupt() and gettimeoffset() using "unsigned" math.

2006-10-04T12:48:28+00:00

It's just a bit easier to follow and timer code is complex enough.

So far, only tested on A500-5x (64-bit SMP), ie: gettimeoffset() code
hasn't been tested at all.

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

[PARISC] Add new function to start local Interval Timer, start_cpu_itimer()

2006-10-04T12:48:07+00:00

I couldn't find where the itimer was getting started for slave CPUs.
CPU 0 (master) itimer was started in time_init() (arch/parisc/kernel/time.c).
start_cpu_itimer() code was striped from time_init().
Slaves now start their itimer in smp_cpu_init().

This is a first step towards making gettimeoffset() work for SMP.
Next step will be to determine the CR16 (cycle counter)
offsets for each CPU relative to the master (CPU 0).

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

[PATCH] kill wall_jiffies

2006-10-01T07:39:27+00:00

With 2.6.18-rc4-mm2, now wall_jiffies will always be the same as jiffies.
So we can kill wall_jiffies completely.

This is just a cleanup and logically should not change any real behavior
except for one thing: RTC updating code in (old) ppc and xtensa use a
condition "jiffies - wall_jiffies == 1".  This condition is never met so I
suppose it is just a bug.  I just remove that condition only instead of
kill the whole "if" block.

[heiko.carstens@de.ibm.com: s390 build fix and cleanup]
Signed-off-by: Atsushi Nemoto 
Cc: Andi Kleen 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: Russell King 
Cc: Ian Molton 
Cc: Mikael Starvik 
Cc: David Howells 
Cc: Yoshinori Sato 
Cc: Hirokazu Takata 
Cc: Ralf Baechle 
Cc: Kyle McMartin 
Cc: Heiko Carstens 
Cc: Martin Schwidefsky 
Cc: Paul Mundt 
Cc: Kazumoto Kojima 
Cc: Richard Curnow 
Cc: William Lee Irwin III 
Cc: "David S. Miller" 
Cc: Jeff Dike 
Cc: Paolo 'Blaisorblade' Giarrusso 
Cc: Miles Bader 
Cc: Chris Zankel 
Cc: "Luck, Tony" 
Cc: Geert Uytterhoeven 
Cc: Roman Zippel 
Signed-off-by: Heiko Carstens 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds