NAME

       pmap — machine-dependent portion of virtual memory subsystem

SYNOPSIS

       #include <sys/param.h>
       #include <vm/vm.h>
       #include <vm/pmap.h>

DESCRIPTION

       The  pmap  module  is  the machine-dependent portion of the FreeBSD VM (Virtual Memory) sub-system.  Each
       function documented herein must have its own architecture-dependent implementation.

       The pmap module is responsible for managing hardware-dependent objects such as page tables, address maps,
       TLBs, etc.

       Machine-dependent code must provide the header file <machine/pmap.h>.  This file contains the  definition
       of the pmap structure:

             struct pmap {
                     /* Contents defined by pmap implementation. */
             };
             typedef struct pmap *pmap_t;

       This header file may also define other data structures used by the pmap implementation.

       The header file <vm/pmap.h> defines a structure for tracking pmap statistics (see below).  This structure
       is defined as:

             struct pmap_statistics {
                     long        resident_count; /* number of mapped pages */
                     long        wired_count;    /* number of wired pages */
             };

       The implementation's struct pmap must contain an instance of this structure having the name pm_stats, and
       it must be updated by the implementation after each relevant pmap operation.

SEE ALSO

       pmap(9),    pmap_activate(9),   pmap_change_wiring(9),   pmap_clear_modify(9),   pmap_clear_reference(9),
       pmap_copy(9),    pmap_copy_page(9),     pmap_enter(9),     pmap_extract(9),     pmap_extract_and_hold(9),
       pmap_growkernel(9),    pmap_init(9),    pmap_init2(9),    pmap_is_modified(9),   pmap_is_prefaultable(9),
       pmap_map(9),  pmap_mincore(9),  pmap_object_init_pt(9),   pmap_page_exists_quick(9),   pmap_page_init(9),
       pmap_page_protect(9),  pmap_pinit(9),  pmap_pinit0(9),  pmap_pinit2(9),  pmap_protect(9), pmap_qenter(9),
       pmap_qremove(9),    pmap_release(9),    pmap_remove(9),     pmap_remove_all(9),     pmap_remove_pages(9),
       pmap_resident_count(9),  pmap_ts_modified(9),  pmap_wired_count(9), pmap_zero_area(9), pmap_zero_idle(9),
       pmap_zero_page(9), vm_map(9)

AUTHORS

       This manual page was written by Bruce M Simpson <bms@spc.org>.

Debian                                            July 21, 2003                                          PMAP(9)