NAME
pmap_copy,
pmap_copy_page —
copy physical memory pages
SYNOPSIS
#include
<sys/param.h>
#include <vm/vm.h>
#include <vm/pmap.h>
void
pmap_copy(pmap_t dst_pmap,
pmap_t src_pmap, vm_offset_t
dst_addr, vm_size_t len,
vm_offset_t src_addr);
void
pmap_copy_page(vm_page_t
src, vm_page_t
dst);
DESCRIPTION
Thepmap_copy()
function copies the range specified by src_addr and
len from the source physical map
src_pmap to the destination physical map
dst_pmap at the address dst_addr.
The
pmap_copy_page()
function copies the physical page src to the physical
page dst, by mapping the page into kernel virtual
address space (KVA), and using
bcopy()
to copy the page.
IMPLEMENTATION NOTES
The pmap_copy() routine is only advisory
and need not do anything. Actually implementing it may seriously reduce
system performance.
The pmap_copy_page() routine only operates
upon a single page.
SEE ALSO
AUTHORS
This manual page was written by Bruce M Simpson <bms@spc.org>.