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; --- 47 unchanged lines hidden (view full) --- 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{ |
64 private: |
65 /** 66 * The physical address of the request. Valid only if validPaddr 67 * is set. */ |
68 Addr paddr; |
69 |
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; |
75 |
76 /** Flag structure for the request. */ 77 uint32_t flags; 78 |
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 |
85 /** The address space ID. */ 86 int asid; |
87 /** The virtual address of the request. */ 88 Addr vaddr; |
89 |
90 /** The return value of store conditional. */ 91 uint64_t scResult; |
92 |
93 /** The cpu number (for statistics, typically). */ |
94 int cpuNum; |
95 /** The requesting thread id (for statistics, typically). */ |
96 int threadNum; |
97 98 /** program counter of initiating access; for tracing/debugging */ 99 Addr pc; |
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 |
112 public: |
113 /** Minimal constructor. No fields are initialized. */ 114 Request() 115 : validPaddr(false), validAsidVaddr(false), 116 validScResult(false), validCpuAndThreadNums(false), validPC(false) 117 {} |
118 |
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 |
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 |
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 |
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 |
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 |
180 /** Accessor for paddr. */ 181 Addr getPaddr() { assert(validPaddr); return paddr; } |
182 |
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__ |