NAME
pmap_qenter,
pmap_qremove —
manage temporary kernel space
mappings
SYNOPSIS
#include
<sys/param.h>
#include <vm/vm.h>
#include <vm/pmap.h>
void
pmap_qenter(vm_offset_t
sva, vm_page_t *m,
int count);
void
pmap_qremove(vm_offset_t
sva, int
count);
DESCRIPTION
Thepmap_qenter()
function accepts a linear array of count pointers to
wired pages *m, and enters each of these pages into the
kernel virtual address (KVA) space, beginning at the address
sva. The pages are mapped non-executable, if possible.
(For example, non-PAE i386 has no capability to map pages non-executable.)
The
pmap_qremove()
function tears out a mapping from the kernel virtual address space,
beginning at sva and for count
pages.
IMPLEMENTATION NOTES
The pmap_qenter() function is intended for
temporary mappings that do not require page modification or reference
counting. Old mappings are simply overwritten. The pages
must be
wired into physical memory.
The corresponding pmap_qremove() function
is intended to remove such temporary mappings.
SEE ALSO
AUTHORS
This manual page was written by Bruce M Simpson <bms@spc.org>.