pmap(9) machine-dependent portion of virtual memory subsystem


In sys/param.h In vm/vm.h In vm/pmap.h


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

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

Machine-dependent code must provide the header file In machine/pmap.h . This file contains the definition of the Vt 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 implementation.

The header file In vm/pmap.h defines a structure for tracking 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 Vt 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 operation.


This manual page was written by An Bruce M Simpson Aq [email protected] .