1/* 2 * Copyright (c) 2004-2005 The Regents of The University of Michigan 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 are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Nathan Binkert 29 */ 30 31#ifndef __ARCH_ALPHA_VPTR_HH__ 32#define __ARCH_ALPHA_VPTR_HH__ 33 34#include "arch/vtophys.hh" 35#include "arch/isa_traits.hh"
| 1/* 2 * Copyright (c) 2004-2005 The Regents of The University of Michigan 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 are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Nathan Binkert 29 */ 30 31#ifndef __ARCH_ALPHA_VPTR_HH__ 32#define __ARCH_ALPHA_VPTR_HH__ 33 34#include "arch/vtophys.hh" 35#include "arch/isa_traits.hh"
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| 36#include "mem/vport.hh"
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36 37class ThreadContext; 38 39template <class T> 40class VPtr 41{ 42 public: 43 typedef T Type; 44
| 37 38class ThreadContext; 39 40template <class T> 41class VPtr 42{ 43 public: 44 typedef T Type; 45
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45 private:
| 46 protected:
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46 ThreadContext *tc; 47 Addr ptr;
| 47 ThreadContext *tc; 48 Addr ptr;
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| 49 Addr buffer[(sizeof(T)-1)/sizeof(Addr) + 1];
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48 49 public:
| 50 51 public:
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50 ThreadContext *GetTC() const { return tc; } 51 Addr GetPointer() const { return ptr; }
| 52 explicit VPtr(ThreadContext *_tc, Addr p = 0) 53 : tc(_tc), ptr(p) 54 { 55 refresh(); 56 }
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52
| 57
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53 public: 54 explicit VPtr(ThreadContext *_tc, Addr p = 0) : tc(_tc), ptr(p) { }
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55 template <class U>
| 58 template <class U>
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56 VPtr(const VPtr<U> &vp) : tc(vp.GetTC()), ptr(vp.GetPointer()) {} 57 ~VPtr() {}
| 59 VPtr(const VPtr &vp) 60 : tc(vp.tc), ptr(vp.ptr) 61 { 62 refresh(); 63 }
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58
| 64
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59 bool operator!() const
| 65 ~VPtr() 66 {} 67 68 void 69 refresh()
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60 {
| 70 {
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61 return ptr == 0;
| 71 if (!ptr) 72 return; 73 74 VirtualPort *port = tc->getVirtPort(tc); 75 port->readBlob(ptr, buffer, sizeof(T)); 76 tc->delVirtPort(port);
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62 } 63
| 77 } 78
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64 VPtr<T> operator+(int offset)
| 79 bool 80 operator!() const
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65 {
| 81 {
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66 VPtr<T> ptr(*this); 67 ptr += offset;
| 82 return ptr == 0; 83 }
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68
| 84
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69 return ptr;
| 85 VPtr<T> 86 operator+(int offset) 87 { 88 return VPtr<T>(tc, ptr + offset);
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70 } 71
| 89 } 90
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72 const VPtr<T> &operator+=(int offset)
| 91 const VPtr & 92 operator+=(int offset)
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73 { 74 ptr += offset;
| 93 { 94 ptr += offset;
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75 assert((ptr & (TheISA::PageBytes - 1)) + sizeof(T) 76 < TheISA::PageBytes);
| 95 refresh();
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77 78 return *this; 79 } 80
| 96 97 return *this; 98 } 99
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81 const VPtr<T> &operator=(Addr p)
| 100 const VPtr & 101 operator=(Addr p)
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82 {
| 102 {
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83 assert((p & (TheISA::PageBytes - 1)) + sizeof(T) 84 < TheISA::PageBytes);
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85 ptr = p;
| 103 ptr = p;
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| 104 refresh();
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86 87 return *this; 88 } 89 90 template <class U>
| 105 106 return *this; 107 } 108 109 template <class U>
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91 const VPtr<T> &operator=(const VPtr<U> &vp)
| 110 const VPtr & 111 operator=(const VPtr<U> &vp)
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92 {
| 112 {
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93 tc = vp.GetTC(); 94 ptr = vp.GetPointer();
| 113 tc = vp.tc; 114 ptr = vp.ptr; 115 refresh();
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95 96 return *this; 97 } 98 99 operator T *() 100 {
| 116 117 return *this; 118 } 119 120 operator T *() 121 {
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101 panic("Needs to be rewritten\n"); 102/* void *addr = vtomem(tc, ptr, sizeof(T)); 103 return (T *)addr; 104 */
| 122 return (T *)buffer;
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105 } 106
| 123 } 124
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107 T *operator->()
| 125 T * 126 operator->()
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108 {
| 127 {
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109 panic("Needs to be rewritten\n"); 110/* void *addr = vtomem(tc, ptr, sizeof(T)); 111 return (T *)addr; 112 */
| 128 return (T *)buffer;
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113 } 114
| 129 } 130
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115 T &operator*()
| 131 T & 132 operator*()
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116 {
| 133 {
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117 panic("Needs to be rewritten\n"); 118/* void *addr = vtomem(tc, ptr, sizeof(T)); 119 return *(T *)addr; 120 */
| 134 return *(T *)buffer;
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121 } 122}; 123 124#endif // __ARCH_ALPHA_VPTR_HH__
| 135 } 136}; 137 138#endif // __ARCH_ALPHA_VPTR_HH__
|