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authorThomas Gleixner <tglx@linutronix.de>2007-10-12 23:04:06 +0200
committerThomas Gleixner <tglx@inhelltoy.tec.linutronix.de>2007-10-12 23:04:06 +0200
commit0190dae54de62fbb9ced75d134015266987eb6b8 (patch)
tree5ae8ac1d0da98e39535c8bffd904a9e2c0311e40 /include/asm-x86/i8253.h
parentf5e0e93faf8421083853b2d7a217267f49e27cc3 (diff)
downloadop-kernel-dev-0190dae54de62fbb9ced75d134015266987eb6b8.zip
op-kernel-dev-0190dae54de62fbb9ced75d134015266987eb6b8.tar.gz
i386: prepare sharing the PIT code
PIT clock events work already and the PIT handling is the same for i386 and x86_64. x86_64 does not support PIT as a clock source, so disable the PIT clocksource for x86_64. Use the i386 i8253.h include file for x86_64 as well to share the exports and the PIT constants. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Diffstat (limited to 'include/asm-x86/i8253.h')
-rw-r--r--include/asm-x86/i8253.h26
1 files changed, 22 insertions, 4 deletions
diff --git a/include/asm-x86/i8253.h b/include/asm-x86/i8253.h
index b2a4f99..7eff6fd 100644
--- a/include/asm-x86/i8253.h
+++ b/include/asm-x86/i8253.h
@@ -1,5 +1,23 @@
-#ifdef CONFIG_X86_32
-# include "i8253_32.h"
-#else
-# include "i8253_64.h"
+#ifndef __ASM_I8253_H__
+#define __ASM_I8253_H__
+
+#ifdef CONFIG_X86_64
+# include <asm/8253pit.h>
#endif
+
+/* i8253A PIT registers */
+#define PIT_MODE 0x43
+#define PIT_CH0 0x40
+#define PIT_CH2 0x42
+
+extern spinlock_t i8253_lock;
+
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
+
+extern struct clock_event_device *global_clock_event;
+
+extern void setup_pit_timer(void);
+
+#endif
+
+#endif /* __ASM_I8253_H__ */
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