219 lines
7 KiB
C
219 lines
7 KiB
C
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/* $NetBSD: uvm_pmap.h,v 1.37 2011/06/30 00:49:14 matt Exp $ */
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/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* The Mach Operating System project at Carnegie-Mellon University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)pmap.h 8.1 (Berkeley) 6/11/93
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*
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*
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* Copyright (c) 1987, 1990 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Avadis Tevanian, Jr.
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* Machine address mapping definitions -- machine-independent
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* section. [For machine-dependent section, see "machine/pmap.h".]
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*/
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#ifndef _PMAP_VM_
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#define _PMAP_VM_
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struct lwp; /* for pmap_activate()/pmap_deactivate() proto */
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struct pmap;
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typedef struct pmap *pmap_t;
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/*
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* Each machine dependent implementation is expected to
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* keep certain statistics. They may do this anyway they
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* so choose, but are expected to return the statistics
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* in the following structure.
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*/
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struct pmap_statistics {
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long resident_count; /* # of pages mapped (total)*/
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long wired_count; /* # of pages wired */
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};
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typedef struct pmap_statistics *pmap_statistics_t;
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#ifdef _KERNEL
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extern struct pmap *const kernel_pmap_ptr;
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#define pmap_kernel() kernel_pmap_ptr
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#endif
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/*
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* Cache Type Encodings
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*/
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#define PMAP_CACHE_MASK 0x00000f00
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/* All accesses are uncacheable. No speculative accesses. */
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#define PMAP_NOCACHE 0x00000100 /* [BOTH] */
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/* All accesses are uncacheable. No speculative accesses.
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* Writes are combined. */
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#define PMAP_WRITE_COMBINE 0x00000200 /* [BOTH] */
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/* On reads, cachelines become shared or exclusive if allocated on cache miss.
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* On writes, cachelines become modified on a cache miss. */
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#define PMAP_WRITE_BACK 0x00000300 /* [BOTH] */
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/* = PMAP_NOCACHE but overrideable (e.g. on x86 by MTRRs) */
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#define PMAP_NOCACHE_OVR 0x00000400 /* [BOTH] */
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#ifdef _KERNEL
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#include <machine/pmap.h>
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#endif
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/*
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* Flags passed to pmap_enter(). Note the bottom 3 bits are VM_PROT_*
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* bits, used to indicate the access type that was made (to seed modified
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* and referenced information).
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*
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* Flags marked [PA] are for pmap_kenter_pa() only. Flags marked [BOTH]
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* apply to pmap_kenter_pa() and pmap_enter(). All other flags are valid
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* for pmap_enter() only.
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*/
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#define PMAP_WIRED 0x00000010 /* wired mapping */
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#define PMAP_CANFAIL 0x00000020 /* can fail if resource shortage */
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#if defined(PMAP_ENABLE_PMAP_KMPAGE)
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#define PMAP_KMPAGE 0x00000040 /* [PA] page used for kernel memory */
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#else
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#define PMAP_KMPAGE 0x00000000
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#endif /* PMAP_ENABLE_PMAP_KMPAGE */
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#define PMAP_MD_MASK 0xff000000 /* [BOTH] Machine-dependent bits */
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#define PMAP_PROT_MASK 0x0000000f /* [BOTH] VM_PROT_* bit mask */
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#ifndef PMAP_EXCLUDE_DECLS /* Used in Sparc port to virtualize pmap mod */
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#ifdef _KERNEL
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__BEGIN_DECLS
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void pmap_activate(struct lwp *);
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void pmap_deactivate(struct lwp *);
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void pmap_unwire(pmap_t, vaddr_t);
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#if !defined(pmap_clear_modify)
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bool pmap_clear_modify(struct vm_page *);
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#endif
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#if !defined(pmap_clear_reference)
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bool pmap_clear_reference(struct vm_page *);
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#endif
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#if !defined(pmap_copy)
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void pmap_copy(pmap_t, pmap_t, vaddr_t, vsize_t, vaddr_t);
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#endif
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#if !defined(pmap_copy_page)
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void pmap_copy_page(paddr_t, paddr_t);
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#endif
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struct pmap *pmap_create(void);
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void pmap_destroy(pmap_t);
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int pmap_enter(pmap_t, vaddr_t, paddr_t, vm_prot_t, u_int);
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bool pmap_extract(pmap_t, vaddr_t, paddr_t *);
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#if defined(PMAP_GROWKERNEL)
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vaddr_t pmap_growkernel(vaddr_t);
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#endif
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void pmap_init(void);
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void pmap_kenter_pa(vaddr_t, paddr_t, vm_prot_t, u_int);
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void pmap_kremove(vaddr_t, vsize_t);
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#if !defined(pmap_is_modified)
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bool pmap_is_modified(struct vm_page *);
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#endif
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#if !defined(pmap_is_referenced)
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bool pmap_is_referenced(struct vm_page *);
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#endif
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void pmap_page_protect(struct vm_page *, vm_prot_t);
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#if !defined(pmap_phys_address)
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paddr_t pmap_phys_address(paddr_t);
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#endif
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#if !defined(pmap_mmap_flags)
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#define pmap_mmap_flags(x) 0
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#endif
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void pmap_protect(pmap_t, vaddr_t, vaddr_t, vm_prot_t);
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#if !defined(pmap_reference)
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void pmap_reference(pmap_t);
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#endif
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#if !defined(pmap_remove)
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void pmap_remove(pmap_t, vaddr_t, vaddr_t);
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#endif
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void pmap_remove_all(struct pmap *);
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#if !defined(pmap_update)
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void pmap_update(pmap_t);
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#endif
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#if !defined(pmap_resident_count)
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long pmap_resident_count(pmap_t);
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#endif
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#if !defined(pmap_wired_count)
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long pmap_wired_count(pmap_t);
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#endif
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#if !defined(pmap_zero_page)
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void pmap_zero_page(paddr_t);
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#endif
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void pmap_virtual_space(vaddr_t *, vaddr_t *);
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#if defined(PMAP_STEAL_MEMORY)
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vaddr_t pmap_steal_memory(vsize_t, vaddr_t *, vaddr_t *);
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#endif
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#if defined(PMAP_FORK)
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void pmap_fork(pmap_t, pmap_t);
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#endif
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__END_DECLS
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#endif /* kernel*/
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#endif /* PMAP_EXCLUDE_DECLS */
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#endif /* _PMAP_VM_ */
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