Query: pmap_copy_page
OS: freebsd
Section: 9
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
PMAP_COPY(9) BSD Kernel Developer's Manual PMAP_COPY(9)NAMEpmap_copy, pmap_copy_page -- copy physical memory pagesSYNOPSIS#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);DESCRIPTIONThe 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.IMPLEMENTATION NOTESThe 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 ALSObcopy(3), pmap(9)AUTHORSThis manual page was written by Bruce M Simpson <bms@spc.org>.BSDJuly 21, 2003 BSD