File: /usr/src/linux/include/asm-mips64/sn/intr_public.h

1     /* 
2      * This file is subject to the terms and conditions of the GNU General Public
3      * License.  See the file "COPYING" in the main directory of this archive
4      * for more details.
5      *
6      * Copyright (C) 1992 - 1997 Silicon Graphics, Inc.
7      */
8     #ifndef __ASM_SN_INTR_PUBLIC_H
9     #define __ASM_SN_INTR_PUBLIC_H
10     
11     
12     /* REMEMBER: If you change these, the whole world needs to be recompiled.
13      * It would also require changing the hubspl.s code and SN0/intr.c
14      * Currently, the spl code has no support for multiple INTPEND1 masks.
15      */
16     
17     #define	N_INTPEND0_MASKS	1
18     #define	N_INTPEND1_MASKS	1
19     
20     #define INTPEND0_MAXMASK	(N_INTPEND0_MASKS - 1)
21     #define INTPEND1_MAXMASK	(N_INTPEND1_MASKS - 1)
22     
23     #if _LANGUAGE_C
24     #include <asm/sn/arch.h>
25     
26     struct intr_vecblk_s;	/* defined in asm/sn/intr.h */
27     
28     /*
29      * The following are necessary to create the illusion of a CEL
30      * on the SN0 hub.  We'll add more priority levels soon, but for
31      * now, any interrupt in a particular band effectively does an spl.
32      * These must be in the PDA since they're different for each processor.
33      * Users of this structure must hold the vector_lock in the appropriate vector
34      * block before modifying the mask arrays.  There's only one vector block
35      * for each Hub so a lock in the PDA wouldn't be adequate.
36      */
37     typedef struct hub_intmasks_s {
38     	/*
39     	 * The masks are stored with the lowest-priority (most inclusive)
40     	 * in the lowest-numbered masks (i.e., 0, 1, 2...).
41     	 */
42     	/* INT_PEND0: */
43     	hubreg_t		intpend0_masks[N_INTPEND0_MASKS]; 
44     	/* INT_PEND1: */
45     	hubreg_t		intpend1_masks[N_INTPEND1_MASKS];
46     	/* INT_PEND0: */
47     	struct intr_vecblk_s	*dispatch0;	
48     	/* INT_PEND1: */
49     	struct intr_vecblk_s	*dispatch1;
50     } hub_intmasks_t;
51     
52     #endif /* _LANGUAGE_C */
53     #endif /* __ASM_SN_INTR_PUBLIC_H */
54