mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
e8a4a618cf
pages around, taking array of vm_page_t both for source and destination. Starting offsets and total transfer size are specified. The function implements optimal algorithm for copying using the platform-specific optimizations. For instance, on the architectures were the direct map is available, no transient mappings are created, for i386 the per-cpu ephemeral page frame is used. The code was typically borrowed from the pmap_copy_page() for the same architecture. Only i386/amd64, powerpc aim and arm/arm-v6 implementations were tested at the time of commit. High-level code, not committed yet to the tree, ensures that the use of the function is only allowed after explicit enablement. For sparc64, the existing code has known issues and a stab is added instead, to allow the kernel linking. Sponsored by: The FreeBSD Foundation Tested by: pho (i386, amd64), scottl (amd64), ian (arm and arm-v6) MFC after: 2 weeks
156 lines
6.1 KiB
C
156 lines
6.1 KiB
C
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* The Mach Operating System project at Carnegie-Mellon University.
|
|
*
|
|
* 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
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from: @(#)pmap.h 8.1 (Berkeley) 6/11/93
|
|
*
|
|
*
|
|
* Copyright (c) 1987, 1990 Carnegie-Mellon University.
|
|
* All rights reserved.
|
|
*
|
|
* Author: Avadis Tevanian, Jr.
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and
|
|
* its documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
|
|
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie the
|
|
* rights to redistribute these changes.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Machine address mapping definitions -- machine-independent
|
|
* section. [For machine-dependent section, see "machine/pmap.h".]
|
|
*/
|
|
|
|
#ifndef _PMAP_VM_
|
|
#define _PMAP_VM_
|
|
/*
|
|
* Each machine dependent implementation is expected to
|
|
* keep certain statistics. They may do this anyway they
|
|
* so choose, but are expected to return the statistics
|
|
* in the following structure.
|
|
*/
|
|
struct pmap_statistics {
|
|
long resident_count; /* # of pages mapped (total) */
|
|
long wired_count; /* # of pages wired */
|
|
};
|
|
typedef struct pmap_statistics *pmap_statistics_t;
|
|
|
|
/*
|
|
* Each machine-dependent implementation is required to provide:
|
|
*
|
|
* vm_memattr_t pmap_page_get_memattr(vm_page_t);
|
|
* boolean_t pmap_page_is_mapped(vm_page_t);
|
|
* boolean_t pmap_page_is_write_mapped(vm_page_t);
|
|
* void pmap_page_set_memattr(vm_page_t, vm_memattr_t);
|
|
*/
|
|
#include <machine/pmap.h>
|
|
|
|
#ifdef _KERNEL
|
|
struct thread;
|
|
|
|
/*
|
|
* Updates to kernel_vm_end are synchronized by the kernel_map's system mutex.
|
|
*/
|
|
extern vm_offset_t kernel_vm_end;
|
|
|
|
void pmap_activate(struct thread *td);
|
|
void pmap_align_superpage(vm_object_t, vm_ooffset_t, vm_offset_t *,
|
|
vm_size_t);
|
|
#if defined(__mips__)
|
|
void pmap_align_tlb(vm_offset_t *);
|
|
#endif
|
|
void pmap_change_wiring(pmap_t, vm_offset_t, boolean_t);
|
|
void pmap_clear_modify(vm_page_t m);
|
|
void pmap_clear_reference(vm_page_t m);
|
|
void pmap_copy(pmap_t, pmap_t, vm_offset_t, vm_size_t, vm_offset_t);
|
|
void pmap_copy_page(vm_page_t, vm_page_t);
|
|
void pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset,
|
|
vm_page_t mb[], vm_offset_t b_offset, int xfersize);
|
|
void pmap_enter(pmap_t, vm_offset_t, vm_prot_t, vm_page_t,
|
|
vm_prot_t, boolean_t);
|
|
void pmap_enter_object(pmap_t pmap, vm_offset_t start,
|
|
vm_offset_t end, vm_page_t m_start, vm_prot_t prot);
|
|
void pmap_enter_quick(pmap_t pmap, vm_offset_t va, vm_page_t m,
|
|
vm_prot_t prot);
|
|
vm_paddr_t pmap_extract(pmap_t pmap, vm_offset_t va);
|
|
vm_page_t pmap_extract_and_hold(pmap_t pmap, vm_offset_t va,
|
|
vm_prot_t prot);
|
|
void pmap_growkernel(vm_offset_t);
|
|
void pmap_init(void);
|
|
boolean_t pmap_is_modified(vm_page_t m);
|
|
boolean_t pmap_is_prefaultable(pmap_t pmap, vm_offset_t va);
|
|
boolean_t pmap_is_referenced(vm_page_t m);
|
|
vm_offset_t pmap_map(vm_offset_t *, vm_paddr_t, vm_paddr_t, int);
|
|
int pmap_mincore(pmap_t pmap, vm_offset_t addr,
|
|
vm_paddr_t *locked_pa);
|
|
void pmap_object_init_pt(pmap_t pmap, vm_offset_t addr,
|
|
vm_object_t object, vm_pindex_t pindex, vm_size_t size);
|
|
boolean_t pmap_page_exists_quick(pmap_t pmap, vm_page_t m);
|
|
void pmap_page_init(vm_page_t m);
|
|
int pmap_page_wired_mappings(vm_page_t m);
|
|
int pmap_pinit(pmap_t);
|
|
void pmap_pinit0(pmap_t);
|
|
void pmap_protect(pmap_t, vm_offset_t, vm_offset_t, vm_prot_t);
|
|
void pmap_qenter(vm_offset_t, vm_page_t *, int);
|
|
void pmap_qremove(vm_offset_t, int);
|
|
void pmap_release(pmap_t);
|
|
void pmap_remove(pmap_t, vm_offset_t, vm_offset_t);
|
|
void pmap_remove_all(vm_page_t m);
|
|
void pmap_remove_pages(pmap_t);
|
|
void pmap_remove_write(vm_page_t m);
|
|
void pmap_sync_icache(pmap_t, vm_offset_t, vm_size_t);
|
|
boolean_t pmap_ts_referenced(vm_page_t m);
|
|
void pmap_zero_page(vm_page_t);
|
|
void pmap_zero_page_area(vm_page_t, int off, int size);
|
|
void pmap_zero_page_idle(vm_page_t);
|
|
|
|
#define pmap_resident_count(pm) ((pm)->pm_stats.resident_count)
|
|
#define pmap_wired_count(pm) ((pm)->pm_stats.wired_count)
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* _PMAP_VM_ */
|