packet.hh (2685:a0821abe7132) packet.hh (2811:9da12e9830ce)
1/*
2 * Copyright (c) 2006 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;

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41#include "mem/request.hh"
42#include "arch/isa_traits.hh"
43#include "sim/root.hh"
44
45struct Packet;
46typedef Packet* PacketPtr;
47typedef uint8_t* PacketDataPtr;
48
1/*
2 * Copyright (c) 2006 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;

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41#include "mem/request.hh"
42#include "arch/isa_traits.hh"
43#include "sim/root.hh"
44
45struct Packet;
46typedef Packet* PacketPtr;
47typedef uint8_t* PacketDataPtr;
48
49//For statistics we need max number of commands, hard code it at
50//20 for now. @todo fix later
51#define NUM_MEM_CMDS 1 << 9
52
49/**
50 * A Packet is used to encapsulate a transfer between two objects in
51 * the memory system (e.g., the L1 and L2 cache). (In contrast, a
52 * single Request travels all the way from the requester to the
53 * ultimate destination and back, possibly being conveyed by several
54 * different Packets along the way.)
55 */
56class Packet

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97
98 /** Are the 'addr' and 'size' fields valid? */
99 bool addrSizeValid;
100 /** Is the 'src' field valid? */
101 bool srcValid;
102
103 public:
104
53/**
54 * A Packet is used to encapsulate a transfer between two objects in
55 * the memory system (e.g., the L1 and L2 cache). (In contrast, a
56 * single Request travels all the way from the requester to the
57 * ultimate destination and back, possibly being conveyed by several
58 * different Packets along the way.)
59 */
60class Packet

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101
102 /** Are the 'addr' and 'size' fields valid? */
103 bool addrSizeValid;
104 /** Is the 'src' field valid? */
105 bool srcValid;
106
107 public:
108
109 /** Used to calculate latencies for each packet.*/
110 Tick time;
111
105 /** The special destination address indicating that the packet
106 * should be routed based on its address. */
107 static const short Broadcast = -1;
108
109 /** A pointer to the original request. */
110 RequestPtr req;
111
112 /** A virtual base opaque structure used to hold coherence-related

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144 {
145 IsRead = 1 << 0,
146 IsWrite = 1 << 1,
147 IsPrefetch = 1 << 2,
148 IsInvalidate = 1 << 3,
149 IsRequest = 1 << 4,
150 IsResponse = 1 << 5,
151 NeedsResponse = 1 << 6,
112 /** The special destination address indicating that the packet
113 * should be routed based on its address. */
114 static const short Broadcast = -1;
115
116 /** A pointer to the original request. */
117 RequestPtr req;
118
119 /** A virtual base opaque structure used to hold coherence-related

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151 {
152 IsRead = 1 << 0,
153 IsWrite = 1 << 1,
154 IsPrefetch = 1 << 2,
155 IsInvalidate = 1 << 3,
156 IsRequest = 1 << 4,
157 IsResponse = 1 << 5,
158 NeedsResponse = 1 << 6,
159 IsSWPrefetch = 1 << 7,
160 IsHWPrefetch = 1 << 8
152 };
153
154 public:
155 /** List of all commands associated with a packet. */
156 enum Command
157 {
158 ReadReq = IsRead | IsRequest | NeedsResponse,
159 WriteReq = IsWrite | IsRequest | NeedsResponse,
160 WriteReqNoAck = IsWrite | IsRequest,
161 ReadResp = IsRead | IsResponse,
161 };
162
163 public:
164 /** List of all commands associated with a packet. */
165 enum Command
166 {
167 ReadReq = IsRead | IsRequest | NeedsResponse,
168 WriteReq = IsWrite | IsRequest | NeedsResponse,
169 WriteReqNoAck = IsWrite | IsRequest,
170 ReadResp = IsRead | IsResponse,
162 WriteResp = IsWrite | IsResponse
171 WriteResp = IsWrite | IsResponse,
172 Writeback = IsWrite | IsRequest,
173 SoftPFReq = IsRead | IsRequest | IsSWPrefetch | NeedsResponse,
174 HardPFReq = IsRead | IsRequest | IsHWPrefetch | NeedsResponse,
175 SoftPFResp = IsRead | IsRequest | IsSWPrefetch | IsResponse,
176 HardPFResp = IsRead | IsRequest | IsHWPrefetch | IsResponse
163 };
164
165 /** Return the string name of the cmd field (for debugging and
166 * tracing). */
167 const std::string &cmdString() const;
168
177 };
178
179 /** Return the string name of the cmd field (for debugging and
180 * tracing). */
181 const std::string &cmdString() const;
182
183 /** Reutrn the string to a cmd given by idx. */
184 const std::string &cmdIdxToString(Command idx);
185
186 /** Return the index of this command. */
187 inline int cmdToIndex() const { return (int) cmd; }
188
169 /** The command field of the packet. */
170 Command cmd;
171
172 bool isRead() { return (cmd & IsRead) != 0; }
173 bool isRequest() { return (cmd & IsRequest) != 0; }
174 bool isResponse() { return (cmd & IsResponse) != 0; }
175 bool needsResponse() { return (cmd & NeedsResponse) != 0; }
176

--- 124 unchanged lines hidden --- 		189 /** The command field of the packet. */
190 Command cmd;
191
192 bool isRead() { return (cmd & IsRead) != 0; }
193 bool isRequest() { return (cmd & IsRequest) != 0; }
194 bool isResponse() { return (cmd & IsResponse) != 0; }
195 bool needsResponse() { return (cmd & NeedsResponse) != 0; }
196

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