pmap(9)

NAME

pmap - machine-dependent portion of virtual memory subsystem

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

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-depen
dent objects such as page tables, address maps, TLBs, etc.
Machine-dependent code must provide the header file 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 #include <vm/pmap.h> defines a structure for tracking pmap statistics (see be
low). 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 pms_tats, and it must be updated by the
implementation after each relevant pmap operation.