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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-01-14 20:07:35 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-05-02 09:35:36 +0100 |
| commit | f5fc00826d1e60af0e22cb9f65b933d823a8ed84 (patch) | |
| tree | bcff2df77e951dbfc0833cda47620ee3c65694ac /arch/arm/mach-versatile | |
| parent | 6be4826e37122b25cb10b215fc84c3a0b1fe1402 (diff) | |
| download | op-kernel-dev-f5fc00826d1e60af0e22cb9f65b933d823a8ed84.zip op-kernel-dev-f5fc00826d1e60af0e22cb9f65b933d823a8ed84.tar.gz | |
ARM: Realview/Versatile: separate out common sched_clock()
Provide a common sched_clock() implementation for Versatile and
Realview.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-versatile')
| -rw-r--r-- | arch/arm/mach-versatile/core.c | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c index b68ddd3..490fc75 100644 --- a/arch/arm/mach-versatile/core.c +++ b/arch/arm/mach-versatile/core.c @@ -28,7 +28,6 @@ #include <linux/amba/clcd.h> #include <linux/amba/pl061.h> #include <linux/amba/mmci.h> -#include <linux/cnt32_to_63.h> #include <linux/io.h> #include <asm/clkdev.h> @@ -227,27 +226,6 @@ void __init versatile_map_io(void) iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc)); } -#define VERSATILE_REFCOUNTER (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_24MHz_OFFSET) - -/* - * This is the Versatile sched_clock implementation. This has - * a resolution of 41.7ns, and a maximum value of about 35583 days. - * - * The return value is guaranteed to be monotonic in that range as - * long as there is always less than 89 seconds between successive - * calls to this function. - */ -unsigned long long sched_clock(void) -{ - unsigned long long v = cnt32_to_63(readl(VERSATILE_REFCOUNTER)); - - /* the <<1 gets rid of the cnt_32_to_63 top bit saving on a bic insn */ - v *= 125<<1; - do_div(v, 3<<1); - - return v; -} - #define VERSATILE_FLASHCTRL (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_FLASH_OFFSET) |
