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moea64_if.m (216174) moea64_if.m (279252)
1#-
1#-
2# Copyright (c) 2010 Nathan Whitehorn
2# Copyright (c) 2010,2015 Nathan Whitehorn
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions
7# are met:
8# 1. Redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer.
10# 2. Redistributions in binary form must reproduce the above copyright

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18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24# SUCH DAMAGE.
25#
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions
7# are met:
8# 1. Redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer.
10# 2. Redistributions in binary form must reproduce the above copyright

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18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24# SUCH DAMAGE.
25#
26# $FreeBSD: head/sys/powerpc/aim/moea64_if.m 216174 2010-12-04 02:42:52Z nwhitehorn $
26# $FreeBSD: head/sys/powerpc/aim/moea64_if.m 279252 2015-02-24 21:37:20Z nwhitehorn $
27#
28
29
30#include <sys/param.h>
31#include <sys/lock.h>
32#include <sys/mutex.h>
33#include <sys/systm.h>
34

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39
40/**
41 * MOEA64 kobj methods for 64-bit Book-S page table
42 * manipulation routines used, for example, by hypervisors.
43 */
44
45INTERFACE moea64;
46
27#
28
29
30#include <sys/param.h>
31#include <sys/lock.h>
32#include <sys/mutex.h>
33#include <sys/systm.h>
34

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39
40/**
41 * MOEA64 kobj methods for 64-bit Book-S page table
42 * manipulation routines used, for example, by hypervisors.
43 */
44
45INTERFACE moea64;
46
47CODE {
48 static moea64_pte_replace_t moea64_pte_replace_default;
47
49
50 static int64_t moea64_pte_replace_default(mmu_t mmu,
51 struct pvo_entry *pvo, int flags)
52 {
53 int64_t refchg;
54
55 refchg = MOEA64_PTE_UNSET(mmu, pvo);
56 MOEA64_PTE_INSERT(mmu, pvo);
57
58 return (refchg);
59 }
60}
61
48/**
62/**
49 * Copy ref/changed bits from PTE referenced by _pt_cookie to _pvo_pt.
63 * Return ref/changed bits from PTE referenced by _pvo if _pvo is currently in
64 * the page table. Returns -1 if _pvo not currently present in the page table.
50 */
65 */
51METHOD void pte_synch {
66METHOD int64_t pte_synch {
52 mmu_t _mmu;
67 mmu_t _mmu;
53 uintptr_t _pt_cookie;
54 struct lpte *_pvo_pt;
68 struct pvo_entry *_pvo;
55};
56
57/**
58 * Clear bits ptebit (a mask) from the low word of the PTE referenced by
69};
70
71/**
72 * Clear bits ptebit (a mask) from the low word of the PTE referenced by
59 * _pt_cookie. Note that _pvo_pt is for reference use only -- the bit should
60 * NOT be cleared there.
73 * _pvo. Return previous values of ref/changed bits or -1 if _pvo is not
74 * currently in the page table.
61 */
75 */
62METHOD void pte_clear {
76METHOD int64_t pte_clear {
63 mmu_t _mmu;
77 mmu_t _mmu;
64 uintptr_t _pt_cookie;
65 struct lpte *_pvo_pt;
66 uint64_t _vpn;
78 struct pvo_entry *_pvo;
67 uint64_t _ptebit;
68};
69
70/**
79 uint64_t _ptebit;
80};
81
82/**
71 * Invalidate the PTE referenced by _pt_cookie, synchronizing its validity
72 * and ref/changed bits after completion.
83 * Invalidate the PTE referenced by _pvo, returning its ref/changed bits.
84 * Returns -1 if PTE not currently present in page table.
73 */
85 */
74METHOD void pte_unset {
86METHOD int64_t pte_unset {
75 mmu_t _mmu;
87 mmu_t _mmu;
76 uintptr_t _pt_cookie;
77 struct lpte *_pvo_pt;
78 uint64_t _vpn;
88 struct pvo_entry *_pvo;
79};
80
81/**
89};
90
91/**
82 * Update the PTE referenced by _pt_cookie with the values in _pvo_pt,
83 * making sure that the values of ref/changed bits are preserved and
84 * synchronized back to _pvo_pt.
92 * Update the reference PTE to correspond to the contents of _pvo. Has the
93 * same ref/changed semantics as pte_unset() (and should clear R/C bits). May
94 * change the PVO's location in the page table or return with it unmapped if
95 * PVO_WIRED is not set. By default, does unset() followed by insert().
96 *
97 * _flags is a bitmask describing what level of page invalidation should occur:
98 * 0 means no invalidation is required
99 * MOEA64_PTE_PROT_UPDATE signifies that the page protection bits are changing
100 * MOEA64_PTE_INVALIDATE requires an invalidation of the same strength as
101 * pte_unset() followed by pte_insert()
85 */
102 */
86METHOD void pte_change {
103METHOD int64_t pte_replace {
87 mmu_t _mmu;
104 mmu_t _mmu;
88 uintptr_t _pt_cookie;
89 struct lpte *_pvo_pt;
90 uint64_t _vpn;
91};
92
105 struct pvo_entry *_pvo;
106 int _flags;
107} DEFAULT moea64_pte_replace_default;
93
94/**
108
109/**
95 * Insert the PTE _pvo_pt into the PTEG group _ptegidx, returning the index
96 * of the PTE in its group at completion, or -1 if no slots were free. Must
97 * not replace PTEs marked LPTE_WIRED or LPTE_LOCKED, and must set LPTE_HID
98 * and LPTE_VALID appropriately in _pvo_pt.
110 * Insert a PTE corresponding to _pvo into the page table, returning any errors
111 * encountered and (optionally) setting the PVO slot value to some
112 * representation of where the entry was placed.
113 *
114 * Must not replace PTEs marked LPTE_WIRED. If an existing valid PTE is spilled,
115 * must synchronize ref/changed bits as in pte_unset().
99 */
100METHOD int pte_insert {
101 mmu_t _mmu;
116 */
117METHOD int pte_insert {
118 mmu_t _mmu;
102 u_int _ptegidx;
103 struct lpte *_pvo_pt;
119 struct pvo_entry *_pvo;
104};
105
120};
121
106/**
107 * Return the page table reference cookie corresponding to _pvo, or -1 if
108 * the _pvo is not currently in the page table.
109 */
110METHOD uintptr_t pvo_to_pte {
111 mmu_t _mmu;
112 const struct pvo_entry *_pvo;
113};
114
115