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Diffstat (limited to 'src/mem/request.hh')
| -rw-r--r-- | src/mem/request.hh | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/src/mem/request.hh b/src/mem/request.hh new file mode 100644 index 000000000..2db7b7779 --- /dev/null +++ b/src/mem/request.hh @@ -0,0 +1,200 @@ +/* + * Copyright (c) 2002-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** + * @file Decleration of a request, the overall memory request consisting of + the parts of the request that are persistent throughout the transaction. + */ + +#ifndef __MEM_REQUEST_HH__ +#define __MEM_REQUEST_HH__ + +#include "arch/isa_traits.hh" + +class Request; + +typedef Request* RequestPtr; + +/** The request is a Load locked/store conditional. */ +const unsigned LOCKED = 0x001; +/** The virtual address is also the physical address. */ +const unsigned PHYSICAL = 0x002; +/** The request is an ALPHA VPTE pal access (hw_ld). */ +const unsigned VPTE = 0x004; +/** Use the alternate mode bits in ALPHA. */ +const unsigned ALTMODE = 0x008; +/** The request is to an uncacheable address. */ +const unsigned UNCACHEABLE = 0x010; +/** The request should not cause a page fault. */ +const unsigned NO_FAULT = 0x020; +/** The request should be prefetched into the exclusive state. */ +const unsigned PF_EXCLUSIVE = 0x100; +/** The request should be marked as LRU. */ +const unsigned EVICT_NEXT = 0x200; +/** The request should ignore unaligned access faults */ +const unsigned NO_ALIGN_FAULT = 0x400; + +class Request +{ + //@todo Make Accesor functions, make these private. + public: + /** Constructor, needs a bool to signify if it is/isn't Cpu Request. */ + Request(bool isCpu); + + /** reset the request to it's initial state so it can be reused.*/ + void resetAll(bool isCpu); + + /** reset the request's addrs times, etc, so but not everything to same + * time. */ + void resetMin(); + +//First non-cpu request fields + private: + /** The physical address of the request. */ + Addr paddr; + /** Wether or not paddr is valid (has been written yet). */ + bool validPaddr; + + /** The size of the request. */ + int size; + /** Wether or not size is valid (has been written yet). */ + bool validSize; + + /** The time this request was started. Used to calculate latencies. */ + Tick time; + /** Wether or not time is valid (has been written yet). */ + bool validTime; + + /** Destination address if this is a block copy. */ + Addr copyDest; + /** Wether or not copyDest is valid (has been written yet). */ + bool validCopyDest; + + /** Flag structure for the request. */ + uint32_t flags; + +//Accsesors for non-cpu request fields + public: + /** Accesor for paddr. */ + Addr getPaddr(); + /** Accesor for paddr. */ + void setPaddr(Addr _paddr); + + /** Accesor for size. */ + int getSize(); + /** Accesor for size. */ + void setSize(int _size); + + /** Accesor for time. */ + Tick getTime(); + /** Accesor for time. */ + void setTime(Tick _time); + + /** Accesor for copy dest. */ + Addr getCopyDest(); + /** Accesor for copy dest. */ + void setCopyDest(Addr _copyDest); + + /** Accesor for flags. */ + uint32_t getFlags(); + /** Accesor for paddr. */ + void setFlags(uint32_t _flags); + +//Now cpu-request fields + private: + /** Bool to signify if this is a cpuRequest. */ + bool cpuReq; + + /** The virtual address of the request. */ + Addr vaddr; + /** Wether or not the vaddr is valid. */ + bool validVaddr; + + /** The address space ID. */ + int asid; + /** Wether or not the asid is valid. */ + bool validAsid; + + /** The return value of store conditional. */ + uint64_t scResult; + /** Wether or not the sc result is valid. */ + bool validScResult; + + /** The cpu number for statistics. */ + int cpuNum; + /** Wether or not the cpu number is valid. */ + bool validCpuNum; + + /** The requesting thread id. */ + int threadNum; + /** Wether or not the thread id is valid. */ + bool validThreadNum; + + /** program counter of initiating access; for tracing/debugging */ + Addr pc; + /** Wether or not the pc is valid. */ + bool validPC; + +//Accessor Functions for cpu request fields + public: + /** Accesor function to determine if this is a cpu request or not.*/ + bool isCpuRequest(); + + /** Accesor function for vaddr.*/ + Addr getVaddr(); + /** Accesor function for vaddr.*/ + void setVaddr(Addr _vaddr); + + /** Accesor function for asid.*/ + int getAsid(); + /** Accesor function for asid.*/ + void setAsid(int _asid); + + /** Accesor function for store conditional return value.*/ + uint64_t getScResult(); + /** Accesor function for store conditional return value.*/ + void setScResult(uint64_t _scResult); + + /** Accesor function for cpu number.*/ + int getCpuNum(); + /** Accesor function for cpu number.*/ + void setCpuNum(int _cpuNum); + + /** Accesor function for thread number.*/ + int getThreadNum(); + /** Accesor function for thread number.*/ + void setThreadNum(int _threadNum); + + /** Accesor function for pc.*/ + Addr getPC(); + /** Accesor function for pc.*/ + void setPC(Addr _pc); + +}; + +#endif // __MEM_REQUEST_HH__ |