pmap_copy, pmap_copy_page — copy physical memory pages
pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr, vm_size_t len, vm_offset_t src_addr);
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 <bms [AT] spc.org>.
BSD July 21, 2003 BSD