diff options
| author | David S. Miller <davem@sunset.davemloft.net> | 2006-02-17 21:33:13 +0100 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 10:13:29 +0100 |
| commit | 3763be32d591cacf808c36390a8af3f2784cde5f (patch) | |
| tree | 124ae01bf91905a6d3af931caf28acf82900699b /arch | |
| parent | [SPARC64]: Set associativity of kernel TSB descriptor correctly. (diff) | |
| download | linux-3763be32d591cacf808c36390a8af3f2784cde5f.tar.xz linux-3763be32d591cacf808c36390a8af3f2784cde5f.zip | |
[SPARC64]: Define ARCH_HAS_READ_CURRENT_TIMER.
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc64/kernel/time.c | 8 | ||||
| -rw-r--r-- | arch/sparc64/lib/delay.c | 19 |
2 files changed, 9 insertions, 18 deletions
diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c index 7041146f86f0..f6275adbc811 100644 --- a/arch/sparc64/kernel/time.c +++ b/arch/sparc64/kernel/time.c @@ -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, diff --git a/arch/sparc64/lib/delay.c b/arch/sparc64/lib/delay.c index e8808727617a..fb27e54a03ee 100644 --- a/arch/sparc64/lib/delay.c +++ b/arch/sparc64/lib/delay.c @@ -1,6 +1,6 @@ /* delay.c: Delay loops for sparc64 * - * Copyright (C) 2004 David S. Miller <davem@redhat.com> + * Copyright (C) 2004, 2006 David S. Miller <davem@davemloft.net> * * Based heavily upon x86 variant which is: * Copyright (C) 1993 Linus Torvalds @@ -8,19 +8,16 @@ */ #include <linux/delay.h> +#include <asm/timer.h> void __delay(unsigned long loops) { - __asm__ __volatile__( -" b,pt %%xcc, 1f\n" -" cmp %0, 0\n" -" .align 32\n" -"1:\n" -" bne,pt %%xcc, 1b\n" -" subcc %0, 1, %0\n" - : "=&r" (loops) - : "0" (loops) - : "cc"); + unsigned long bclock, now; + + bclock = tick_ops->get_tick(); + do { + now = tick_ops->get_tick(); + } while ((now-bclock) < loops); } /* We used to multiply by HZ after shifting down by 32 bits |