116 lines
3.1 KiB
Objective-C
116 lines
3.1 KiB
Objective-C
#-
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# Copyright (c) 2010 Nathan Whitehorn
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# All rights reserved.
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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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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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# $FreeBSD$
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#
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/systm.h>
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#include <vm/vm.h>
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#include <vm/vm_page.h>
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#include <machine/mmuvar.h>
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/**
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* MOEA64 kobj methods for 64-bit Book-S page table
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* manipulation routines used, for example, by hypervisors.
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*/
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INTERFACE moea64;
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/**
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* Copy ref/changed bits from PTE referenced by _pt_cookie to _pvo_pt.
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*/
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METHOD void pte_synch {
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mmu_t _mmu;
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uintptr_t _pt_cookie;
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struct lpte *_pvo_pt;
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};
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/**
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* Clear bits ptebit (a mask) from the low word of the PTE referenced by
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* _pt_cookie. Note that _pvo_pt is for reference use only -- the bit should
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* NOT be cleared there.
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*/
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METHOD void pte_clear {
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mmu_t _mmu;
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uintptr_t _pt_cookie;
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struct lpte *_pvo_pt;
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uint64_t _vpn;
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uint64_t _ptebit;
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};
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/**
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* Invalidate the PTE referenced by _pt_cookie, synchronizing its validity
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* and ref/changed bits after completion.
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*/
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METHOD void pte_unset {
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mmu_t _mmu;
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uintptr_t _pt_cookie;
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struct lpte *_pvo_pt;
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uint64_t _vpn;
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};
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/**
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* Update the PTE referenced by _pt_cookie with the values in _pvo_pt,
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* making sure that the values of ref/changed bits are preserved and
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* synchronized back to _pvo_pt.
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*/
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METHOD void pte_change {
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mmu_t _mmu;
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uintptr_t _pt_cookie;
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struct lpte *_pvo_pt;
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uint64_t _vpn;
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};
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/**
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* Insert the PTE _pvo_pt into the PTEG group _ptegidx, returning the index
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* of the PTE in its group at completion, or -1 if no slots were free. Must
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* not replace PTEs marked LPTE_WIRED or LPTE_LOCKED, and must set LPTE_HID
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* and LPTE_VALID appropriately in _pvo_pt.
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*/
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METHOD int pte_insert {
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mmu_t _mmu;
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u_int _ptegidx;
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struct lpte *_pvo_pt;
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};
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/**
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* Return the page table reference cookie corresponding to _pvo, or -1 if
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* the _pvo is not currently in the page table.
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*/
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METHOD uintptr_t pvo_to_pte {
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mmu_t _mmu;
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const struct pvo_entry *_pvo;
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};
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