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| 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/sparc64/lib | |
| 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/sparc64/lib')
| -rw-r--r-- | arch/sparc64/lib/delay.c | 19 |
1 files changed, 8 insertions, 11 deletions
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 |