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- /* Copyright (c) 1990 UNIX System Laboratories, Inc. */
- /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */
- /* All Rights Reserved */
-
- /* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF */
- /* UNIX System Laboratories, Inc. */
- /* The copyright notice above does not evidence any */
- /* actual or intended publication of such source code. */
-
- #ifndef _SYS_GETPAGES_H
- #define _SYS_GETPAGES_H
-
- #ident "@(#)/usr/include/sys/getpages.h.sl 1.1 4.0 12/08/90 17570 AT&T-USL"
-
- /* The following list is used to keep track of regions locked
- ** by getpages.
- */
-
- typedef struct {
- reg_t *gpr_rgptr; /* Pointer to the region. */
- int gpr_count; /* Number of pages from this */
- /* region in spglist and */
- /* fpglist. */
- } gprgl_t;
-
- extern gprgl_t gprglst[];
- extern int gprgndx;
-
-
- /* The following structure is used to maintain a list of
- * pages to be stolen by getpages.
- */
-
- typedef struct {
- pte_t *gp_ptptr; /* Ptr to page table entry. */
- gprgl_t *gp_rlptr; /* Ptr to region list entry. */
- } pglst_t;
-
- /* The following define sets the maximum size chunk which
- * getpages can swap out at once. The tuneable parameter
- * tune.t_maxsc can never be made larger than this value.
- */
-
- #define MAXSPGLST 100
-
- /* The following list is used to accumulate pages which we
- ** wish to steal but which must be written to swap first.
- */
-
- extern pglst_t spglst[];
- extern int spglndx;
-
- /* The following list is used to accumulate pages which we
- ** wish to steal and which have a current copy on swap or
- ** a file and thus do not require any I/O to be done before
- ** they can be stolen. The reason for accummulating them
- ** in a list instead of free each page as it is found is
- ** to reduce the number of ATB purges required.
- */
-
- #define MAXFPGLST 100
-
- extern pglst_t fpglst[];
- extern int fpglndx;
-
-
- /* The following word is used to lock the getpages tables
- ** described above so that vhand and sched can't both
- ** use them at the same time.
- */
-
- extern int pglstlock;
- extern int pglstlk();
- extern int pglstunlk();
-
- #endif /* _SYS_GETPAGES_H */
-