[PATCH 6/10] Time: i386 Conversion - part 1: Move timer_pit.c to i8253.c

john stultz
2006-03-23T03:06:58Z

This patch is just a simple cleanup for the i386 arch in
preparation of moving to the generic timeofday infrastructure. It
simply moves the PIT initialization code, locks, and other code we want
to keep from some code from timer_pit.c (which will be removed) to
i8253.c.

thanks
-john

Signed-off-by: John Stultz <johnstul@us.ibm.com>

Makefile | 2 +-
i8253.c | 32 ++++++++++++++++++++++++++++++++
time.c | 5 -----
timers/timer_pit.c | 13 -------------
4 files changed, 33 insertions(+), 19 deletions(-)

linux-2.6.16_timeofday-arch-i386-part1_C1.patch
============================================
diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile
index 65656c0..687a29b 100644
--- a/arch/i386/kernel/Makefile
+++ b/arch/i386/kernel/Makefile
@@ -7,7 +7,7 @@ extra-y := head.o init_task.o vmlinux.ld
obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o \
ptrace.o time.o ioport.o ldt.o setup.o i8259.o sys_i386.o \
pci-dma.o i386_ksyms.o i387.o dmi_scan.o bootflag.o \
- quirks.o i8237.o topology.o
+ quirks.o i8237.o i8253.o topology.o

obj-y += cpu/
obj-y += timers/
diff --git a/arch/i386/kernel/i8253.c b/arch/i386/kernel/i8253.c
new file mode 100644
index 0000000..29cb2eb
--- /dev/null
+++ b/arch/i386/kernel/i8253.c
@@ -0,0 +1,32 @@
+/*
+ * i8253.c 8253/PIT functions
+ *
+ */
+#include <linux/spinlock.h>
+#include <linux/jiffies.h>
+#include <linux/sysdev.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <asm/smp.h>
+#include <asm/delay.h>
+#include <asm/i8253.h>
+#include <asm/io.h>
+
+#include "io_ports.h"
+
+DEFINE_SPINLOCK(i8253_lock);
+EXPORT_SYMBOL(i8253_lock);
+
+void setup_pit_timer(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&i8253_lock, flags);
+ outb_p(0x34,PIT_MODE); /* binary, mode 2, LSB/MSB, ch 0 */
+ udelay(10);
+ outb_p(LATCH & 0xff , PIT_CH0); /* LSB */
+ udelay(10);
+ outb(LATCH >> 8 , PIT_CH0); /* MSB */
+ spin_unlock_irqrestore(&i8253_lock, flags);
+}
diff --git a/arch/i386/kernel/time.c b/arch/i386/kernel/time.c
index 9d30747..796e5fa 100644
--- a/arch/i386/kernel/time.c
+++ b/arch/i386/kernel/time.c
@@ -82,11 +82,6 @@ extern unsigned long wall_jiffies;
DEFINE_SPINLOCK(rtc_lock);
EXPORT_SYMBOL(rtc_lock);

-#include <asm/i8253.h>
-
-DEFINE_SPINLOCK(i8253_lock);
-EXPORT_SYMBOL(i8253_lock);
-
struct timer_opts *cur_timer __read_mostly = &timer_none;

/*
diff --git a/arch/i386/kernel/timers/timer_pit.c b/arch/i386/kernel/timers/timer_pit.c
index b9b6bd5..44cbdf9 100644
--- a/arch/i386/kernel/timers/timer_pit.c
+++ b/arch/i386/kernel/timers/timer_pit.c
@@ -162,16 +162,3 @@ struct init_timer_opts __initdata timer_
.init = init_pit,
.opts = &timer_pit,
};
-
-void setup_pit_timer(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&i8253_lock, flags);
- outb_p(0x34,PIT_MODE); /* binary, mode 2, LSB/MSB, ch 0 */
- udelay(10);
- outb_p(LATCH & 0xff , PIT_CH0); /* LSB */
- udelay(10);
- outb(LATCH >> 8 , PIT_CH0); /* MSB */
- spin_unlock_irqrestore(&i8253_lock, flags);
-}