pmap_object_init_pt(9) [freebsd man page]

PMAP_OBJECT_INIT_PT(9)					   BSD Kernel Developer's Manual				    PMAP_OBJECT_INIT_PT(9)

NAME

     pmap_object_init_pt -- initialize page tables for a VM object

SYNOPSIS

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

     void
     pmap_object_init_pt(pmap_t pmap, vm_offset_t addr, vm_object_t object, vm_pindex_t pindex, vm_size_t size, int limit);

DESCRIPTION

     The pmap_object_init_pt() function preloads the page table entries into the specified physical map pmap, for the given object at the virtual
     address addr, for size bytes, beginning at the page index pindex within the object.  The map bits limit are heeded when creating the mapping.

IMPLEMENTATION NOTES

     This function is not strictly required by an architecture's pmap(9) implementation, but it does provide performance benefits if implemented.

     It is intended to eliminate the blast of soft faults on process startup, and immediately following a call to mmap(2).

SEE ALSO

     pmap(9), vm_map(9)

AUTHORS

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

BSD
								   July 21, 2003							       BSD

PMAP(9) 						   BSD Kernel Developer's Manual						   PMAP(9)

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 implemen-
     tation after each relevant pmap operation.

SEE ALSO

     pmap(9), pmap_activate(9), pmap_clear_modify(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_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_referenced(9), pmap_unwire(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>.

BSD
								  August 3, 2014							       BSD