pagetable.hh (6019:76890d8b28f5) pagetable.hh (7399:a378ac1e1615)
1/*
1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
14 * Copyright (c) 2002-2005 The Regents of The University of Michigan
3 * Copyright (c) 2007 MIPS Technologies, Inc.
4 * Copyright (c) 2007-2008 The Florida State University
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met: redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer;
11 * redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the

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24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * Authors: Nathan Binkert
31 * Steve Reinhardt
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the

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34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Nathan Binkert
41 * Steve Reinhardt
32 * Jaidev Patwardhan
33 * Stephen Hines
42 * Ali Saidi
34 */
35
36#ifndef __ARCH_ARM_PAGETABLE_H__
37#define __ARCH_ARM_PAGETABLE_H__
38
39#include "arch/arm/isa_traits.hh"
40#include "arch/arm/utility.hh"
41#include "arch/arm/vtophys.hh"
42#include "config/full_system.hh"
43
44namespace ArmISA {
45
43 */
44
45#ifndef __ARCH_ARM_PAGETABLE_H__
46#define __ARCH_ARM_PAGETABLE_H__
47
48#include "arch/arm/isa_traits.hh"
49#include "arch/arm/utility.hh"
50#include "arch/arm/vtophys.hh"
51#include "config/full_system.hh"
52
53namespace ArmISA {
54
46 struct VAddr
55struct VAddr
56{
57 VAddr(Addr a) { panic("not implemented yet."); }
58};
59
60
61// ITB/DTB page table entry
62struct PTE
63{
64 void serialize(std::ostream &os)
47 {
65 {
48 static const int ImplBits = 43;
49 static const Addr ImplMask = (ULL(1) << ImplBits) - 1;
50 static const Addr UnImplMask = ~ImplMask;
66 panic("Need to implement PTE serialization\n");
67 }
51
68
52 VAddr(Addr a) : addr(a) {}
53 Addr addr;
54 operator Addr() const { return addr; }
55 const VAddr &operator=(Addr a) { addr = a; return *this; }
69 void unserialize(Checkpoint *cp, const std::string &section)
70 {
71 panic("Need to implement PTE serialization\n");
72 }
56
73
57 Addr vpn() const { return (addr & ImplMask) >> PageShift; }
58 Addr page() const { return addr & Page_Mask; }
59 Addr offset() const { return addr & PageOffset; }
74};
60
75
61 Addr level3() const
62 { return ArmISA::PteAddr(addr >> PageShift); }
63 Addr level2() const
64 { return ArmISA::PteAddr(addr >> (NPtePageShift + PageShift)); }
65 Addr level1() const
66 { return ArmISA::PteAddr(addr >> (2 * NPtePageShift + PageShift)); }
67 };
76// ITB/DTB table entry
77struct TlbEntry
78{
79 Addr tag; // virtual page number tag
80 Addr ppn; // physical page number
81 uint8_t asn; // address space number
82 bool valid; // valid page table entry
68
83
69 // ITB/DTB page table entry
70 struct PTE
84
85 //Construct an entry that maps to physical address addr.
86 TlbEntry(Addr _asn, Addr _vaddr, Addr _paddr)
71 {
87 {
72 Addr Mask; // What parts of the VAddr (from bits 28..11) should be used in translation (includes Mask and MaskX from PageMask)
73 Addr VPN; // Virtual Page Number (/2) (Includes VPN2 + VPN2X .. bits 31..11 from EntryHi)
74 uint8_t asid; // Address Space ID (8 bits) // Lower 8 bits of EntryHi
88 tag = _vaddr >> PageShift;
89 ppn = _paddr >> PageShift;
90 asn = _asn;
91 valid = true;
92 }
75
93
76 bool G; // Global Bit - Obtained by an *AND* of EntryLo0 and EntryLo1 G bit
94 TlbEntry()
95 {}
77
96
78 /* Contents of Entry Lo0 */
79 Addr PFN0; // Physical Frame Number - Even
80 bool D0; // Even entry Dirty Bit
81 bool V0; // Even entry Valid Bit
82 uint8_t C0; // Cache Coherency Bits - Even
97 void
98 updateVaddr(Addr new_vaddr)
99 {
100 tag = new_vaddr >> PageShift;
101 }
83
102
84 /* Contents of Entry Lo1 */
85 Addr PFN1; // Physical Frame Number - Odd
86 bool D1; // Odd entry Dirty Bit
87 bool V1; // Odd entry Valid Bit
88 uint8_t C1; // Cache Coherency Bits (3 bits)
103 Addr
104 pageStart()
105 {
106 return ppn << PageShift;
107 }
89
108
90 /* The next few variables are put in as optimizations to reduce TLB lookup overheads */
91 /* For a given Mask, what is the address shift amount, and what is the OffsetMask */
92 int AddrShiftAmount;
93 int OffsetMask;
109 void serialize(std::ostream &os);
110 void unserialize(Checkpoint *cp, const std::string &section);
111};
94
112
95 bool Valid() { return (V0 | V1);};
96 void serialize(std::ostream &os);
97 void unserialize(Checkpoint *cp, const std::string &section);
98 };
99
113
114
100};
101#endif // __ARCH_ARM_PAGETABLE_H__
102
115};
116#endif // __ARCH_ARM_PAGETABLE_H__
117