Skip to content

Commit

Permalink
---
Browse files Browse the repository at this point in the history
yaml
---
r: 39119
b: refs/heads/master
c: c7753f1
h: refs/heads/master
i:
  39117: d5b1789
  39115: a19f134
  39111: af529ac
  39103: d137871
v: v3
  • Loading branch information
Matthew Wilcox authored and Matthew Wilcox committed Oct 7, 2006
1 parent 9e6f424 commit 6e8b179
Show file tree
Hide file tree
Showing 3 changed files with 13 additions and 28 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: bbd6330ea1154fc13a351263160d4f9cca2ff5d9
refs/heads/master: c7753f18711782738936f224aaa421468e87f6ed
15 changes: 1 addition & 14 deletions trunk/arch/parisc/kernel/smp.c
Original file line number Diff line number Diff line change
Expand Up @@ -154,7 +154,7 @@ halt_processor(void)


irqreturn_t
ipi_interrupt(int irq, void *dev_id, struct pt_regs *regs)
ipi_interrupt(int irq, void *dev_id)
{
int this_cpu = smp_processor_id();
struct cpuinfo_parisc *p = &cpu_data[this_cpu];
Expand Down Expand Up @@ -414,19 +414,6 @@ smp_flush_tlb_all(void)
on_each_cpu(flush_tlb_all_local, NULL, 1, 1);
}


void
smp_do_timer(struct pt_regs *regs)
{
int cpu = smp_processor_id();
struct cpuinfo_parisc *data = &cpu_data[cpu];

if (!--data->prof_counter) {
data->prof_counter = data->prof_multiplier;
update_process_times(user_mode(regs));
}
}

/*
* Called by secondaries to update state and initialize CPU registers.
*/
Expand Down
24 changes: 11 additions & 13 deletions trunk/arch/parisc/kernel/time.c
Original file line number Diff line number Diff line change
Expand Up @@ -34,10 +34,6 @@

static unsigned long clocktick __read_mostly; /* timer cycles per tick */

#ifdef CONFIG_SMP
extern void smp_do_timer(struct pt_regs *regs);
#endif

/*
* We keep time on PA-RISC Linux by using the Interval Timer which is
* a pair of registers; one is read-only and one is write-only; both
Expand All @@ -55,21 +51,22 @@ extern void smp_do_timer(struct pt_regs *regs);
* held off for an arbitrarily long period of time by interrupts being
* disabled, so we may miss one or more ticks.
*/
irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
irqreturn_t timer_interrupt(int irq, void *dev_id)
{
unsigned long now;
unsigned long next_tick;
unsigned long cycles_elapsed, ticks_elapsed;
unsigned long cycles_remainder;
unsigned int cpu = smp_processor_id();
struct cpuinfo_parisc *cpuinfo = &cpu_data[cpu];

/* gcc can optimize for "read-only" case with a local clocktick */
unsigned long cpt = clocktick;

profile_tick(CPU_PROFILING);

/* Initialize next_tick to the expected tick time. */
next_tick = cpu_data[cpu].it_value;
next_tick = cpuinfo->it_value;

/* Get current interval timer.
* CR16 reads as 64 bits in CPU wide mode.
Expand Down Expand Up @@ -120,7 +117,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
*/
next_tick = now + cycles_remainder;

cpu_data[cpu].it_value = next_tick;
cpuinfo->it_value = next_tick;

/* Skip one clocktick on purpose if we are likely to miss next_tick.
* We want to avoid the new next_tick being less than CR16.
Expand All @@ -131,18 +128,19 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
next_tick += cpt;

/* Program the IT when to deliver the next interrupt. */
/* Only bottom 32-bits of next_tick are written to cr16. */
/* Only bottom 32-bits of next_tick are written to cr16. */
mtctl(next_tick, 16);


/* Done mucking with unreliable delivery of interrupts.
* Go do system house keeping.
*/
#ifdef CONFIG_SMP
smp_do_timer(regs);
#else
update_process_times(user_mode(regs));
#endif

if (!--cpuinfo->prof_counter) {
cpuinfo->prof_counter = cpuinfo->prof_multiplier;
update_process_times(user_mode(get_irq_regs()));
}

if (cpu == 0) {
write_seqlock(&xtime_lock);
do_timer(ticks_elapsed);
Expand Down

0 comments on commit 6e8b179

Please sign in to comment.