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NAMEpmap_copy pmap_copy_page - copy physical memory pages
SYNOPSISIn sys/param.h In vm/vm.h In vm/pmap.h Ft void Fo pmap_copy Fa pmap_t dst_pmap pmap_t src_pmap vm_offset_t dst_addr Fa vm_size_t len vm_offset_t src_addr Fc Ft void Fn pmap_copy_page vm_page_t src vm_page_t dst
DESCRIPTIONThe Fn pmap_copy function copies the range specified by Fa src_addr and Fa len from the source physical map Fa src_pmap to the destination physical map Fa dst_pmap at the address Fa dst_addr .
The Fn pmap_copy_page function copies the physical page Fa src to the physical page Fa dst , by mapping the page into kernel virtual address space (KVA), and using Fn bcopy to copy the page.
IMPLEMENTATION NOTESThe Fn pmap_copy routine is only advisory and need not do anything. Actually implementing it may seriously reduce system performance.
The Fn pmap_copy_page routine only operates upon a single page.