NAME    [Toc]    [Back]

     pmap_zero_page, pmap_zero_area, pmap_zero_idle -- zero-fill a page using
     machine-dependent optimizations

SYNOPSIS    [Toc]    [Back]

     #include <sys/param.h>
     #include <vm/vm.h>
     #include <vm/pmap.h>

     void
     pmap_zero_page(vm_page_t m);

     void
     pmap_zero_page_area(vm_page_t m, int off, int size);

     void
     pmap_zero_page_idle(vm_page_t m);

DESCRIPTION    [Toc]    [Back]

     The pmap_zero_page() function zero-fills an entire page using machinedependent
 optimizations.  The pmap_zero_page_area() function is used to
     zero-fill an area of a page.  The range specified must not cross a page
     boundary; it must be contained entirely within a single page.

     The pmap_zero_page_idle() interface is used by the vm_pagezero process.
     The system-wide Giant lock should not be required to be held in order to
     call this interface.

IMPLEMENTATION NOTES    [Toc]    [Back]

     This function is required to be implemented for each architecture supported
 by FreeBSD.

SEE ALSO    [Toc]    [Back]

     bzero(3), pmap(9)

AUTHORS    [Toc]    [Back]

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


				 July 21, 2003