diff options
author | David S. Miller <davem@sunset.davemloft.net> | 2007-07-14 13:23:37 +0400 |
---|---|---|
committer | David S. Miller <davem@sunset.davemloft.net> | 2007-07-16 15:05:02 +0400 |
commit | 8b99cfb8cc51adae7f5294c8962a026c63100959 (patch) | |
tree | 349cebcae3eda608f1ed52fa3afcf661fca075a9 /arch/sparc64/lib | |
parent | 27a2ef382c7935a4dd02bff9fd361ce118df98c6 (diff) | |
download | linux-8b99cfb8cc51adae7f5294c8962a026c63100959.tar.xz |
[SPARC64]: More sensible udelay implementation.
Take a page from the powerpc folks and just calculate the
delay factor directly.
Since frequency scaling chips use a system-tick register,
the value is going to be the same system-wide.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/lib')
-rw-r--r-- | arch/sparc64/lib/Makefile | 2 | ||||
-rw-r--r-- | arch/sparc64/lib/delay.c | 46 |
2 files changed, 1 insertions, 47 deletions
diff --git a/arch/sparc64/lib/Makefile b/arch/sparc64/lib/Makefile index 4a725d8985f1..c4a6d6e7d03c 100644 --- a/arch/sparc64/lib/Makefile +++ b/arch/sparc64/lib/Makefile @@ -14,6 +14,6 @@ lib-y := PeeCeeI.o copy_page.o clear_page.o strlen.o strncmp.o \ NGmemcpy.o NGcopy_from_user.o NGcopy_to_user.o NGpatch.o \ NGpage.o NGbzero.o \ copy_in_user.o user_fixup.o memmove.o \ - mcount.o ipcsum.o rwsem.o xor.o delay.o + mcount.o ipcsum.o rwsem.o xor.o obj-y += iomap.o diff --git a/arch/sparc64/lib/delay.c b/arch/sparc64/lib/delay.c deleted file mode 100644 index fb27e54a03ee..000000000000 --- a/arch/sparc64/lib/delay.c +++ /dev/null @@ -1,46 +0,0 @@ -/* delay.c: Delay loops for sparc64 - * - * Copyright (C) 2004, 2006 David S. Miller <davem@davemloft.net> - * - * Based heavily upon x86 variant which is: - * Copyright (C) 1993 Linus Torvalds - * Copyright (C) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz> - */ - -#include <linux/delay.h> -#include <asm/timer.h> - -void __delay(unsigned long loops) -{ - 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 - * but that runs into problems for higher values of HZ and - * slow cpus. - */ -void __const_udelay(unsigned long n) -{ - n *= 4; - - n *= (cpu_data(raw_smp_processor_id()).udelay_val * (HZ/4)); - n >>= 32; - - __delay(n + 1); -} - -void __udelay(unsigned long n) -{ - __const_udelay(n * 0x10c7UL); -} - - -void __ndelay(unsigned long n) -{ - __const_udelay(n * 0x5UL); -} |