trusty (9) pmap_qenter.9freebsd.gz

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

     The pmap_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

     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

     pmap(9)

AUTHORS

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