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PMAP_QENTER(9) Kernel Developer's Manual PMAP_QENTER(9)

pmap_qenter, pmap_qremovemanage temporary kernel space mappings

#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);

The () 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 () function tears out a mapping from the kernel virtual address space, beginning at sva and for count pages.

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 be wired into physical memory.

The corresponding pmap_qremove() function is intended to remove such temporary mappings.

pmap(9)

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

February 15, 2018 FreeBSD-12.0