intr_public.h

上传linux-jx2410的源代码

/* $Id: intr_public.h,v 1.1.1.1 2004/02/04 12:57:42 laputa Exp $
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1992 - 1997, 2000 Silicon Graphics, Inc.
 * Copyright (C) 2000 by Colin Ngam
 */
#ifndef _ASM_SN_INTR_PUBLIC_H__
#define _ASM_SN_INTR_PUBLIC_H__

#include <linux/config.h>

/* REMEMBER: If you change these, the whole world needs to be recompiled.
 * It would also require changing the hubspl.s code and SN0/intr.c
 * Currently, the spl code has no support for multiple INTPEND1 masks.
 */

#define	N_INTPEND0_MASKS	1
#define	N_INTPEND1_MASKS	1

#define INTPEND0_MAXMASK	(N_INTPEND0_MASKS - 1)
#define INTPEND1_MAXMASK	(N_INTPEND1_MASKS - 1)

#if _LANGUAGE_C
#if defined(CONFIG_SGI_IP35) || defined(CONFIG_IA64_SGI_SN1) || defined(CONFIG_IA64_GENERIC)
#include <asm/sn/sn1/arch.h>
#endif
#include <asm/sn/arch.h>

struct intr_vecblk_s;	/* defined in asm/sn/intr.h */

/*
 * The following are necessary to create the illusion of a CEL
 * on the IP27 hub.  We'll add more priority levels soon, but for
 * now, any interrupt in a particular band effectively does an spl.
 * These must be in the PDA since they're different for each processor.
 * Users of this structure must hold the vector_lock in the appropriate vector
 * block before modifying the mask arrays.  There's only one vector block
 * for each Hub so a lock in the PDA wouldn't be adequate.
 */
typedef struct hub_intmasks_s {
	/*
	 * The masks are stored with the lowest-priority (most inclusive)
	 * in the lowest-numbered masks (i.e., 0, 1, 2...).
	 */
	/* INT_PEND0: */
	hubreg_t		intpend0_masks[N_INTPEND0_MASKS]; 
	/* INT_PEND1: */
	hubreg_t		intpend1_masks[N_INTPEND1_MASKS];
	/* INT_PEND0: */
	struct intr_vecblk_s	*dispatch0;	
	/* INT_PEND1: */
	struct intr_vecblk_s	*dispatch1;
} hub_intmasks_t;

#endif /* _LANGUAGE_C */
#endif /* _ASM_SN_INTR_PUBLIC_H__ */