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>
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 80b8142..f97f001 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -53,8 +53,6 @@
#include "core.h"
-#define REALVIEW_REFCOUNTER (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_24MHz_OFFSET)
-
/* used by entry-macro.S and platsmp.c */
void __iomem *gic_cpu_base_addr;
@@ -77,20 +75,6 @@
}
#endif
-/*
- * This is the RealView sched_clock implementation. This has
- * a resolution of 41.7ns, and a maximum value of about 179s.
- */
-unsigned long long sched_clock(void)
-{
- unsigned long long v;
-
- v = (unsigned long long)readl(REALVIEW_REFCOUNTER) * 125;
- do_div(v, 3);
-
- return v;
-}
-
#define REALVIEW_FLASHCTRL (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_FLASH_OFFSET)
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 @@
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)
diff --git a/arch/arm/plat-versatile/Makefile b/arch/arm/plat-versatile/Makefile
index 334d2f1..9b1a668 100644
--- a/arch/arm/plat-versatile/Makefile
+++ b/arch/arm/plat-versatile/Makefile
@@ -1,2 +1,4 @@
obj-y := clock.o
obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o
+obj-$(CONFIG_ARCH_REALVIEW) += sched-clock.o
+obj-$(CONFIG_ARCH_VERSATILE) += sched-clock.o
diff --git a/arch/arm/plat-versatile/sched-clock.c b/arch/arm/plat-versatile/sched-clock.c
new file mode 100644
index 0000000..9768cf7
--- /dev/null
+++ b/arch/arm/plat-versatile/sched-clock.c
@@ -0,0 +1,53 @@
+/*
+ * linux/arch/arm/plat-versatile/sched-clock.c
+ *
+ * Copyright (C) 1999 - 2003 ARM Limited
+ * Copyright (C) 2000 Deep Blue Solutions Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/cnt32_to_63.h>
+#include <linux/io.h>
+#include <asm/div64.h>
+
+#include <mach/hardware.h>
+#include <mach/platform.h>
+
+#ifdef VERSATILE_SYS_BASE
+#define REFCOUNTER (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_24MHz_OFFSET)
+#endif
+
+#ifdef REALVIEW_SYS_BASE
+#define REFCOUNTER (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_24MHz_OFFSET)
+#endif
+
+/*
+ * This is the Realview and 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(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;
+}