1/* 2 * Copyright (c) 2002-2005 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 29/** 30 * @file Decleration of a request, the overall memory request consisting of 31 the parts of the request that are persistent throughout the transaction. 32 */ 33 34#ifndef __MEM_REQUEST_HH__ 35#define __MEM_REQUEST_HH__ 36 37#include "arch/isa_traits.hh" 38 39class Request; 40 41typedef Request* RequestPtr; 42 43/** The request is a Load locked/store conditional. */ 44const unsigned LOCKED = 0x001; 45/** The virtual address is also the physical address. */ 46const unsigned PHYSICAL = 0x002; 47/** The request is an ALPHA VPTE pal access (hw_ld). */ 48const unsigned VPTE = 0x004; 49/** Use the alternate mode bits in ALPHA. */ 50const unsigned ALTMODE = 0x008; 51/** The request is to an uncacheable address. */ 52const unsigned UNCACHEABLE = 0x010; 53/** The request should not cause a page fault. */ 54const unsigned NO_FAULT = 0x020; 55/** The request should be prefetched into the exclusive state. */ 56const unsigned PF_EXCLUSIVE = 0x100; 57/** The request should be marked as LRU. */ 58const unsigned EVICT_NEXT = 0x200; 59/** The request should ignore unaligned access faults */ 60const unsigned NO_ALIGN_FAULT = 0x400; 61 62class Request 63{
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64 //@todo Make Accesor functions, make these private.
65 public:
66 /** Constructor, needs a bool to signify if it is/isn't Cpu Request. */
67 Request(bool isCpu);
68
69 /** reset the request to it's initial state so it can be reused.*/
70 void resetAll(bool isCpu);
71
72 /** reset the request's addrs times, etc, so but not everything to same
73 * time. */
74 void resetMin();
75
76//First non-cpu request fields
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64 private:
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78 /** The physical address of the request. */
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65 /** 66 * The physical address of the request. Valid only if validPaddr 67 * is set. */ |
68 Addr paddr;
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80 /** Wether or not paddr is valid (has been written yet). */
81 bool validPaddr;
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69
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83 /** The size of the request. */
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70 /** 71 * The size of the request. This field must be set when vaddr or 72 * paddr is written via setVirt() or setPhys(), so it is always 73 * valid as long as one of the address fields is valid. */ |
74 int size;
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85 /** Wether or not size is valid (has been written yet). */
86 bool validSize;
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75
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88 /** The time this request was started. Used to calculate latencies. */
89 Tick time;
90 /** Wether or not time is valid (has been written yet). */
91 bool validTime;
92
93 /** Destination address if this is a block copy. */
94 Addr copyDest;
95 /** Wether or not copyDest is valid (has been written yet). */
96 bool validCopyDest;
97
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76 /** Flag structure for the request. */ 77 uint32_t flags; 78
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101//Accsesors for non-cpu request fields
102 public:
103 /** Accesor for paddr. */
104 Addr getPaddr();
105 /** Accesor for paddr. */
106 void setPaddr(Addr _paddr);
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79 /** 80 * The time this request was started. Used to calculate 81 * latencies. This field is set to curTick any time paddr or vaddr 82 * is written. */ 83 Tick time; |
84
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108 /** Accesor for size. */
109 int getSize();
110 /** Accesor for size. */
111 void setSize(int _size);
112
113 /** Accesor for time. */
114 Tick getTime();
115 /** Accesor for time. */
116 void setTime(Tick _time);
117
118 /** Accesor for copy dest. */
119 Addr getCopyDest();
120 /** Accesor for copy dest. */
121 void setCopyDest(Addr _copyDest);
122
123 /** Accesor for flags. */
124 uint32_t getFlags();
125 /** Accesor for paddr. */
126 void setFlags(uint32_t _flags);
127
128//Now cpu-request fields
129 private:
130 /** Bool to signify if this is a cpuRequest. */
131 bool cpuReq;
132
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85 /** The address space ID. */ 86 int asid; |
87 /** The virtual address of the request. */ 88 Addr vaddr;
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135 /** Wether or not the vaddr is valid. */
136 bool validVaddr;
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89
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138 /** The address space ID. */
139 int asid;
140 /** Wether or not the asid is valid. */
141 bool validAsid;
142
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90 /** The return value of store conditional. */ 91 uint64_t scResult;
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145 /** Wether or not the sc result is valid. */
146 bool validScResult;
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92
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148 /** The cpu number for statistics. */
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93 /** The cpu number (for statistics, typically). */ |
94 int cpuNum;
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150 /** Wether or not the cpu number is valid. */
151 bool validCpuNum;
152
153 /** The requesting thread id. */
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95 /** The requesting thread id (for statistics, typically). */ |
96 int threadNum;
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155 /** Wether or not the thread id is valid. */
156 bool validThreadNum;
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97 98 /** program counter of initiating access; for tracing/debugging */ 99 Addr pc;
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160 /** Wether or not the pc is valid. */
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100 101 /** Whether or not paddr is valid (has been written yet). */ 102 bool validPaddr; 103 /** Whether or not the asid & vaddr are valid. */ 104 bool validAsidVaddr; 105 /** Whether or not the sc result is valid. */ 106 bool validScResult; 107 /** Whether or not the cpu number & thread ID are valid. */ 108 bool validCpuAndThreadNums; 109 /** Whether or not the pc is valid. */ |
110 bool validPC; 111
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163//Accessor Functions for cpu request fields
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112 public:
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165 /** Accesor function to determine if this is a cpu request or not.*/
166 bool isCpuRequest();
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113 /** Minimal constructor. No fields are initialized. */ 114 Request() 115 : validPaddr(false), validAsidVaddr(false), 116 validScResult(false), validCpuAndThreadNums(false), validPC(false) 117 {} |
118
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168 /** Accesor function for vaddr.*/
169 Addr getVaddr();
170 /** Accesor function for vaddr.*/
171 void setVaddr(Addr _vaddr);
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119 /** 120 * Constructor for physical (e.g. device) requests. Initializes 121 * just physical address, size, flags, and timestamp (to curTick). 122 * These fields are adequate to perform a request. */ 123 Request(Addr _paddr, int _size, int _flags) 124 : validCpuAndThreadNums(false) 125 { setPhys(_paddr, _size, _flags); } |
126
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173 /** Accesor function for asid.*/
174 int getAsid();
175 /** Accesor function for asid.*/
176 void setAsid(int _asid);
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127 /** 128 * Set up CPU and thread numbers. */ 129 void setThreadContext(int _cpuNum, int _threadNum) 130 { 131 cpuNum = _cpuNum; 132 threadNum = _threadNum; 133 validCpuAndThreadNums = true; 134 } |
135
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178 /** Accesor function for store conditional return value.*/
179 uint64_t getScResult();
180 /** Accesor function for store conditional return value.*/
181 void setScResult(uint64_t _scResult);
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136 /** 137 * Set up a physical (e.g. device) request in a previously 138 * allocated Request object. */ 139 void setPhys(Addr _paddr, int _size, int _flags) 140 { 141 paddr = _paddr; 142 size = _size; 143 flags = _flags; 144 time = curTick; 145 validPaddr = true; 146 validAsidVaddr = false; 147 validPC = false; 148 validScResult = false; 149 } |
150
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183 /** Accesor function for cpu number.*/
184 int getCpuNum();
185 /** Accesor function for cpu number.*/
186 void setCpuNum(int _cpuNum);
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151 /** 152 * Set up a virtual (e.g., CPU) request in a previously 153 * allocated Request object. */ 154 void setVirt(int _asid, Addr _vaddr, int _size, int _flags, Addr _pc) 155 { 156 asid = _asid; 157 vaddr = _vaddr; 158 size = _size; 159 flags = _flags; 160 pc = _pc; 161 time = curTick; 162 validPaddr = false; 163 validAsidVaddr = true; 164 validPC = true; 165 validScResult = false; 166 } |
167
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188 /** Accesor function for thread number.*/
189 int getThreadNum();
190 /** Accesor function for thread number.*/
191 void setThreadNum(int _threadNum);
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168 /** Set just the physical address. This should only be used to 169 * record the result of a translation, and thus the vaddr must be 170 * valid before this method is called. Otherwise, use setPhys() 171 * to guarantee that the size and flags are also set. 172 */ 173 void setPaddr(Addr _paddr) 174 { 175 assert(validAsidVaddr); 176 paddr = _paddr; 177 validPaddr = true; 178 } |
179
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193 /** Accesor function for pc.*/
194 Addr getPC();
195 /** Accesor function for pc.*/
196 void setPC(Addr _pc);
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180 /** Accessor for paddr. */ 181 Addr getPaddr() { assert(validPaddr); return paddr; } |
182
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183 /** Accessor for size. */ 184 int getSize() { assert(validPaddr || validAsidVaddr); return size; } 185 /** Accessor for time. */ 186 Tick getTime() { assert(validPaddr || validAsidVaddr); return time; } 187 188 /** Accessor for flags. */ 189 uint32_t getFlags() { assert(validPaddr || validAsidVaddr); return flags; } 190 /** Accessor for paddr. */ 191 void setFlags(uint32_t _flags) 192 { assert(validPaddr || validAsidVaddr); flags = _flags; } 193 194 /** Accessor function for vaddr.*/ 195 Addr getVaddr() { assert(validAsidVaddr); return vaddr; } 196 197 /** Accessor function for asid.*/ 198 int getAsid() { assert(validAsidVaddr); return asid; } 199 200 /** Accessor function for store conditional return value.*/ 201 uint64_t getScResult() { assert(validScResult); return scResult; } 202 /** Accessor function for store conditional return value.*/ 203 void setScResult(uint64_t _scResult) 204 { scResult = _scResult; validScResult = true; } 205 206 /** Accessor function for cpu number.*/ 207 int getCpuNum() { assert(validCpuAndThreadNums); return cpuNum; } 208 /** Accessor function for thread number.*/ 209 int getThreadNum() { assert(validCpuAndThreadNums); return threadNum; } 210 211 /** Accessor function for pc.*/ 212 Addr getPC() { assert(validPC); return pc; } 213 |
214 friend class Packet; 215}; 216 217#endif // __MEM_REQUEST_HH__
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