linux/arch/x86/include/asm/i8253.h

#ifndef _ASM_X86_I8253_H
#define _ASM_X86_I8253_H

/* i8253A PIT registers */
#define PIT_MODE		0x43
#define PIT_CH0			0x40
#define PIT_CH2			0x42

extern raw_spinlock_t i8253_lock;

extern struct clock_event_device *global_clock_event;

extern void setup_pit_timer(void);

#define inb_pit		inb_p
#define outb_pit	outb_p

#endif /* _ASM_X86_I8253_H */
x86: Fix ASM_X86__ header guards Change header guards named "ASM_X86__" to "_ASM_X86_" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com> 2008-10-23 05:26:29 +00:00			`#ifndef _ASM_X86_I8253_H`
			`#define _ASM_X86_I8253_H`
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> 2007-10-12 21:04:06 +00:00
			`/* i8253A PIT registers */`
			`#define PIT_MODE 0x43`
			`#define PIT_CH0 0x40`
			`#define PIT_CH2 0x42`

i8253: Convert i8253_lock to raw_spinlock i8253_lock needs to be a real spinlock in preempt-rt, i.e. it can not be converted to a sleeping lock. Convert it to raw_spinlock and fix up all users. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Takashi Iwai <tiwai@suse.de> Cc: Jens Axboe <jens.axboe@oracle.com> LKML-Reference: <20100217163751.030764372@linutronix.de> 2010-02-17 16:47:10 +00:00			`extern raw_spinlock_t i8253_lock;`
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> 2007-10-12 21:04:06 +00:00
			`extern struct clock_event_device *global_clock_event;`

			`extern void setup_pit_timer(void);`

x86: isolate PIC/PIT in/out calls Rather than remove and/or mangle inb_p/outb_p we want to remove the use of them from inappropriate places. For the PIC/PIT this may eventually depend on 32/64bitism or similar so start by adding inb/outb_pit and inb/outb_pic so that we can make them use any scheme we settle on without disturbing the existing, correct (for ISA), port 0x80 usage. (eg we can make inb_pit use udelay without messing up inb_p). Floppy already does this for the fdc. That really only leaves the CMOS as a core logic item to tackle, and bits of parallel port handling in the chipset layers. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> 2008-01-30 12:33:14 +00:00			`#define inb_pit inb_p`
			`#define outb_pit outb_p`

x86: Fix ASM_X86__ header guards Change header guards named "ASM_X86__" to "_ASM_X86_" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com> 2008-10-23 05:26:29 +00:00			`#endif /* _ASM_X86_I8253_H */`