table of contents
PMAP_QENTER(9) | Kernel Developer's Manual | PMAP_QENTER(9) |
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 pmap_qremove
() function tears out a
mapping from the kernel virtual address space, beginning at
sva and for count pages.
IMPLEMENTATION NOTES¶
Thepmap_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¶
pmap(9)AUTHORS¶
This manual page was written by Bruce M Simpson <bms@spc.org>.July 21, 2003 | Linux 4.9.0-9-amd64 |