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| author | Thomas Gleixner <tglx@linutronix.de> | 2007-10-12 23:04:06 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@inhelltoy.tec.linutronix.de> | 2007-10-12 23:04:06 +0200 |
| commit | 0190dae54de62fbb9ced75d134015266987eb6b8 (patch) | |
| tree | 5ae8ac1d0da98e39535c8bffd904a9e2c0311e40 /include/asm-x86/i8253.h | |
| parent | f5e0e93faf8421083853b2d7a217267f49e27cc3 (diff) | |
| download | op-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.h | 26 |
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__ */ |
