pmap_copy_page (9)

Leading comments

Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
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(The comments found at the beginning of the groff file "man9/pmap_copy_page.9freebsd".)

NAME

pmap_copy pmap_copy_page - copy physical memory pages

SYNOPSIS

In 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

DESCRIPTION

The 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 NOTES

The 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.

SEE ALSO

bcopy(3), pmap(9)

AUTHORS

This manual page was written by An Bruce M Simpson Aq bms@spc.org .