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[SPARC64]: Define ARCH_HAS_READ_CURRENT_TIMER.

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This gives more consistent bogomips and delay() semantics,
especially on sun4v.  It gives weird looking values though...

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-02-17 12:33:13 -08:00
parent 3f19a84e39
commit 3763be32d5
3 changed files with 15 additions and 18 deletions
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8
arch/sparc64/kernel/time.c
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@@ -1029,11 +1029,10 @@ static void sparc64_start_timers(irqreturn_t (*cfunc)(int, void *, struct pt_reg
}
struct freq_table {
unsigned long udelay_val_ref;
unsigned long clock_tick_ref;
unsigned int ref_freq;
};
static DEFINE_PER_CPU(struct freq_table, sparc64_freq_table) = { 0, 0, 0 };
static DEFINE_PER_CPU(struct freq_table, sparc64_freq_table) = { 0, 0 };
unsigned long sparc64_get_clock_tick(unsigned int cpu)
{
@@ -1055,16 +1054,11 @@ static int sparc64_cpufreq_notifier(struct notifier_block *nb, unsigned long val
if (!ft->ref_freq) {
ft->ref_freq = freq->old;
ft->udelay_val_ref = cpu_data(cpu).udelay_val;
ft->clock_tick_ref = cpu_data(cpu).clock_tick;
}
if ((val == CPUFREQ_PRECHANGE && freq->old < freq->new) ||
(val == CPUFREQ_POSTCHANGE && freq->old > freq->new) ||
(val == CPUFREQ_RESUMECHANGE)) {
cpu_data(cpu).udelay_val =
cpufreq_scale(ft->udelay_val_ref,
ft->ref_freq,
freq->new);
cpu_data(cpu).clock_tick =
cpufreq_scale(ft->clock_tick_ref,
ft->ref_freq,