Manual Pages  — PMAP_COPY

pmap_copy, pmap_copy_page – copy physical memory pages

SYNOPSIS DESCRIPTION IMPLEMENTATION NOTES SEE ALSO AUTHORS

#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);

The pmap_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.

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.

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