개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

pmap_quick_enter_page(9)

PMAP_QUICK_ENTER_PAGE(9) BSD Kernel Developer's ManualPMAP_QUICK_ENTER_PAGE(9)

NAME
     pmap_quick_enter_page, pmap_quick_remove_page — manage fast, single-page
     kernel address space mappings

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

     vm_offset_t
     pmap_quick_enter_page(vm_page_t m);

     void
     pmap_quick_remove_page(vm_offset_t kva);

DESCRIPTION
     The pmap_quick_enter_page() function accepts a single page m, and enters
     this page into a preallocated address in kernel virtual address (KVA)
     space.  This function is intended for temporary mappings that will only
     be used for a very short period, for example a copy operation on the page
     contents.

     The pmap_quick_remove_page() function removes a mapping previously cre‐
     ated by pmap_quick_enter_page() at kva, making the KVA frame used by
     pmap_quick_enter_page() available for reuse.

     On many architectures, pmap_quick_enter_page() uses a per-CPU pageframe.
     In those cases, it must disable preemption on the local CPU.  The corre‐
     sponding call to pmap_quick_remove_page() then re-enables preemption.  It
     is therefore not safe for machine-independent code to sleep or perform
     locking operations while holding these mappings.  Current implementations
     only guarantee the availability of a single page for the calling thread,
     so calls to pmap_quick_enter_page() must not be nested.

     pmap_quick_enter_page() and pmap_quick_remove_page() do not sleep, and
     pmap_quick_enter_page() always returns a valid address.  It is safe to
     use these functions under all types of locks except spin mutexes.  It is
     also safe to use them in all thread contexts except primary interrupt
     context.

     The page must not be swapped or otherwise reused while the mapping is
     active.  It must be either wired or held, or it must belong to an unman‐
     aged region such as I/O device memory.

RETURN VALUES
     The pmap_quick_enter_page() function returns the kernel virtual address
     that is mapped to the page m.

SEE ALSO
     pmap(9)

AUTHORS
     This manual page was written by Jason A Harmening <jah@FreeBSD.org>.

BSD                             August 6, 2015                             BSD