[mirror_ubuntu-disco-kernel.git] / arch / x86 / include / asm / ipi.h

#ifndef _ASM_X86_IPI_H
#define _ASM_X86_IPI_H

#ifdef CONFIG_X86_LOCAL_APIC

/*
 * Copyright 2004 James Cleverdon, IBM.
 * Subject to the GNU Public License, v.2
 *
 * Generic APIC InterProcessor Interrupt code.
 *
 * Moved to include file by James Cleverdon from
 * arch/x86-64/kernel/smp.c
 *
 * Copyrights from kernel/smp.c:
 *
 * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
 * (c) 1998-99, 2000 Ingo Molnar <mingo@redhat.com>
 * (c) 2002,2003 Andi Kleen, SuSE Labs.
 * Subject to the GNU Public License, v.2
 */

#include <asm/hw_irq.h>
#include <asm/apic.h>
#include <asm/smp.h>

/*
 * the following functions deal with sending IPIs between CPUs.
 *
 * We use 'broadcast', CPU->CPU IPIs and self-IPIs too.
 */

static inline unsigned int __prepare_ICR(unsigned int shortcut, int vector,
					 unsigned int dest)
{
	unsigned int icr = shortcut | dest;

	switch (vector) {
	default:
		icr |= APIC_DM_FIXED | vector;
		break;
	case NMI_VECTOR:
		icr |= APIC_DM_NMI;
		break;
	}
	return icr;
}

static inline int __prepare_ICR2(unsigned int mask)
{
	return SET_APIC_DEST_FIELD(mask);
}

static inline void __xapic_wait_icr_idle(void)
{
	while (native_apic_mem_read(APIC_ICR) & APIC_ICR_BUSY)
		cpu_relax();
}

void __default_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest);
Commit	Line	Data
1965aae3 PA	1	#ifndef _ASM_X86_IPI_H
1965aae3 PA	2	#define _ASM_X86_IPI_H
1da177e4	3
d53e2f28 IM	4	#ifdef CONFIG_X86_LOCAL_APIC
d53e2f28 IM	5
1da177e4 LT	6	/*
	7	* Copyright 2004 James Cleverdon, IBM.
	8	* Subject to the GNU Public License, v.2
	9	*
	10	* Generic APIC InterProcessor Interrupt code.
	11	*
	12	* Moved to include file by James Cleverdon from
	13	* arch/x86-64/kernel/smp.c
	14	*
	15	* Copyrights from kernel/smp.c:
	16	*
	17	* (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
	18	* (c) 1998-99, 2000 Ingo Molnar <mingo@redhat.com>
	19	* (c) 2002,2003 Andi Kleen, SuSE Labs.
	20	* Subject to the GNU Public License, v.2
	21	*/
	22
1da177e4	23	#include <asm/hw_irq.h>
00f1ea69	24	#include <asm/apic.h>
e3f8ba81	25	#include <asm/smp.h>
1da177e4 LT	26
	27	/*
	28	* the following functions deal with sending IPIs between CPUs.
	29	*
	30	* We use 'broadcast', CPU->CPU IPIs and self-IPIs too.
	31	*/
	32
061b3d90 JP	33	static inline unsigned int __prepare_ICR(unsigned int shortcut, int vector,
061b3d90 JP	34	unsigned int dest)
1da177e4	35	{
1a426cb7 JB	36	unsigned int icr = shortcut \| dest;
	37
	38	switch (vector) {
	39	default:
	40	icr \|= APIC_DM_FIXED \| vector;
	41	break;
	42	case NMI_VECTOR:
1a426cb7 JB	43	icr \|= APIC_DM_NMI;
	44	break;
	45	}
1da177e4 LT	46	return icr;
	47	}
	48
061b3d90	49	static inline int __prepare_ICR2(unsigned int mask)
1da177e4 LT	50	{
	51	return SET_APIC_DEST_FIELD(mask);
	52	}
	53
1b374e4d SS	54	static inline void __xapic_wait_icr_idle(void)
	55	{
	56	while (native_apic_mem_read(APIC_ICR) & APIC_ICR_BUSY)
	57	cpu_relax();
	58	}
	59
1a8aa8ac	60	void __default_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest);
1da177e4	61