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;
--- 25 unchanged lines hidden (view full) ---
34 * @file
35 * Declaration of a request, the overall memory request consisting of
36 the parts of the request that are persistent throughout the transaction.
37 */
38
39#ifndef __MEM_REQUEST_HH__
40#define __MEM_REQUEST_HH__
41
42#include "base/fast_alloc.hh"
43#include "sim/host.hh"
44#include "sim/core.hh"
45
46#include <cassert>
47
48class Request;
49
50typedef Request* RequestPtr;
51
52
53/** ASI information for this request if it exsits. */
54const uint32_t ASI_BITS = 0x000FF;
55/** The request is a Load locked/store conditional. */
56const uint32_t LOCKED = 0x00100;
57/** The virtual address is also the physical address. */
58const uint32_t PHYSICAL = 0x00200;
59/** The request is an ALPHA VPTE pal access (hw_ld). */
60const uint32_t VPTE = 0x00400;
61/** Use the alternate mode bits in ALPHA. */
62const uint32_t ALTMODE = 0x00800;
63/** The request is to an uncacheable address. */
64const uint32_t UNCACHEABLE = 0x01000;
65/** The request should not cause a page fault. */
66const uint32_t NO_FAULT = 0x02000;
67/** The request should be prefetched into the exclusive state. */
68const uint32_t PF_EXCLUSIVE = 0x10000;
69/** The request should be marked as LRU. */
70const uint32_t EVICT_NEXT = 0x20000;
71/** The request should ignore unaligned access faults */
72const uint32_t NO_ALIGN_FAULT = 0x40000;
73/** The request was an instruction read. */
74const uint32_t INST_READ = 0x80000;
75/** This request is for a memory swap. */
76const uint32_t MEM_SWAP = 0x100000;
77const uint32_t MEM_SWAP_COND = 0x200000;
78/** The request should ignore unaligned access faults */
79const uint32_t NO_HALF_WORD_ALIGN_FAULT = 0x400000;
80
81
82class Request : public FastAlloc
83{
84 private:
85 /**
86 * The physical address of the request. Valid only if validPaddr
87 * is set. */
88 Addr paddr;
89
90 /**
91 * The size of the request. This field must be set when vaddr or
92 * paddr is written via setVirt() or setPhys(), so it is always
93 * valid as long as one of the address fields is valid. */
94 int size;
95
96 /** Flag structure for the request. */
97 uint32_t flags;
98
99 /**
100 * The time this request was started. Used to calculate
101 * latencies. This field is set to curTick any time paddr or vaddr
102 * is written. */
103 Tick time;
104
105 /** The address space ID. */
106 int asid;
107
108 /** This request is to a memory mapped register. */
109 bool mmapedIpr;
110
111 /** The virtual address of the request. */
112 Addr vaddr;
113
114 /** Extra data for the request, such as the return value of
115 * store conditional or the compare value for a CAS. */
116 uint64_t extraData;
117
118 /** The context ID (for statistics, typically). */
119 int _contextId;
120 /** The thread ID (id within this CPU) */
121 int _threadId;
122
123 /** program counter of initiating access; for tracing/debugging */
124 Addr pc;
125
126 /** Whether or not paddr is valid (has been written yet). */
127 bool validPaddr;
128 /** Whether or not the asid & vaddr are valid. */
129 bool validAsidVaddr;
130 /** Whether or not the sc result is valid. */
131 bool validExData;
132 /** Whether or not the context ID is valid. */
133 bool validContextAndThreadIds;
134 /** Whether or not the pc is valid. */
135 bool validPC;
136
137 public:
138 /** Minimal constructor. No fields are initialized. */
139 Request()
140 : validPaddr(false), validAsidVaddr(false),
141 validExData(false), validContextAndThreadIds(false), validPC(false)
142 {}
143
144 /**
145 * Constructor for physical (e.g. device) requests. Initializes
146 * just physical address, size, flags, and timestamp (to curTick).
147 * These fields are adequate to perform a request. */
148 Request(Addr _paddr, int _size, int _flags)
149 : validContextAndThreadIds(false)
150 { setPhys(_paddr, _size, _flags); }
151
152 Request(int _asid, Addr _vaddr, int _size, int _flags, Addr _pc,
153 int _context_id, int _thread_id)
154 {
155 setThreadContext(_context_id, _thread_id);
156 setVirt(_asid, _vaddr, _size, _flags, _pc);
157 }
158
159 ~Request() {} // for FastAlloc
160
161 /**
162 * Set up CPU and thread numbers. */
163 void setThreadContext(int _context_id, int _thread_id)
164 {
165 _contextId = _context_id;
166 _threadId = _thread_id;
167 validContextAndThreadIds = true;
168 }
169
170 /**
171 * Set up a physical (e.g. device) request in a previously
172 * allocated Request object. */
173 void setPhys(Addr _paddr, int _size, int _flags)
174 {
175 assert(_size >= 0);
176 paddr = _paddr;
177 size = _size;
178 flags = _flags;
179 time = curTick;
180 validPaddr = true;
181 validAsidVaddr = false;
182 validPC = false;
183 validExData = false;
184 mmapedIpr = false;
185 }
186
187 /**
188 * Set up a virtual (e.g., CPU) request in a previously
189 * allocated Request object. */
190 void setVirt(int _asid, Addr _vaddr, int _size, int _flags, Addr _pc)
191 {
192 assert(_size >= 0);
193 asid = _asid;
194 vaddr = _vaddr;
195 size = _size;
196 flags = _flags;
197 pc = _pc;
198 time = curTick;
199 validPaddr = false;
200 validAsidVaddr = true;
201 validPC = true;
202 validExData = false;
203 mmapedIpr = false;
204 }
205
206 /** Set just the physical address. This should only be used to
207 * record the result of a translation, and thus the vaddr must be
208 * valid before this method is called. Otherwise, use setPhys()
209 * to guarantee that the size and flags are also set.
210 */
211 void setPaddr(Addr _paddr)
212 {
213 assert(validAsidVaddr);
214 paddr = _paddr;
215 validPaddr = true;
216 }
217
218 /** Accessor for paddr. */
219 Addr getPaddr() { assert(validPaddr); return paddr; }
220
221 /** Accessor for size. */
222 int getSize() { assert(validPaddr || validAsidVaddr); return size; }
223 /** Accessor for time. */
224 Tick getTime() { assert(validPaddr || validAsidVaddr); return time; }
225 void resetTime() { assert(validPaddr || validAsidVaddr); time = curTick; }
226 void
227 setTime(Tick when)
228 {
229 assert(validPaddr || validAsidVaddr);
230 time = when;
231 }
232
233 /** Accessor for flags. */
234 uint32_t getFlags() { assert(validPaddr || validAsidVaddr); return flags; }
235 /** Accessor for paddr. */
236 void setFlags(uint32_t _flags)
237 { assert(validPaddr || validAsidVaddr); flags = _flags; }
238
239 /** Accessor function for vaddr.*/
240 Addr getVaddr() { assert(validAsidVaddr); return vaddr; }
241
242 /** Accessor function for asid.*/
243 int getAsid() { assert(validAsidVaddr); return asid; }
244
245 /** Accessor function for asi.*/
246 uint8_t getAsi() { assert(validAsidVaddr); return flags & ASI_BITS; }
247
248 /** Accessor function for asi.*/
249 void setAsi(uint8_t a)
250 { assert(validAsidVaddr); flags = (flags & ~ASI_BITS) | a; }
251
252 /** Accessor function for asi.*/
253 bool isMmapedIpr() { assert(validPaddr); return mmapedIpr; }
254
255 /** Accessor function for asi.*/
256 void setMmapedIpr(bool r) { assert(validAsidVaddr); mmapedIpr = r; }
257
258 /** Accessor function to check if sc result is valid. */
259 bool extraDataValid() { return validExData; }
260 /** Accessor function for store conditional return value.*/
261 uint64_t getExtraData() { assert(validExData); return extraData; }
262 /** Accessor function for store conditional return value.*/
263 void setExtraData(uint64_t _extraData)
264 { extraData = _extraData; validExData = true; }
265
266 /** Accessor function for context ID.*/
267 int contextId() { assert(validContextAndThreadIds); return _contextId; }
268 /** Accessor function for thread ID. */
269 int threadId() { assert(validContextAndThreadIds); return _threadId; }
270
271 /** Accessor function for pc.*/
272 Addr getPC() { assert(validPC); return pc; }
273
274 /** Accessor Function to Check Cacheability. */
275 bool isUncacheable() { return (getFlags() & UNCACHEABLE) != 0; }
276
277 bool isInstRead() { return (getFlags() & INST_READ) != 0; }
278
279 bool isLocked() { return (getFlags() & LOCKED) != 0; }
280
281 bool isSwap() { return (getFlags() & MEM_SWAP ||
282 getFlags() & MEM_SWAP_COND); }
283
284 bool isCondSwap() { return (getFlags() & MEM_SWAP_COND) != 0; }
285
286 bool inline isMisaligned() {return (!(getFlags() & NO_ALIGN_FAULT) &&
287 ((vaddr & 1) ||
288 (!(getFlags() & NO_HALF_WORD_ALIGN_FAULT)
289 && (vaddr & 0x2))));}
290
291 friend class Packet;
292};
293
294#endif // __MEM_REQUEST_HH__
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;
--- 25 unchanged lines hidden (view full) ---
34 * @file
35 * Declaration of a request, the overall memory request consisting of
36 the parts of the request that are persistent throughout the transaction.
37 */
38
39#ifndef __MEM_REQUEST_HH__
40#define __MEM_REQUEST_HH__
41
42#include "base/fast_alloc.hh"
43#include "sim/host.hh"
44#include "sim/core.hh"
45
46#include <cassert>
47
48class Request;
49
50typedef Request* RequestPtr;
51
52
53/** ASI information for this request if it exsits. */
54const uint32_t ASI_BITS = 0x000FF;
55/** The request is a Load locked/store conditional. */
56const uint32_t LOCKED = 0x00100;
57/** The virtual address is also the physical address. */
58const uint32_t PHYSICAL = 0x00200;
59/** The request is an ALPHA VPTE pal access (hw_ld). */
60const uint32_t VPTE = 0x00400;
61/** Use the alternate mode bits in ALPHA. */
62const uint32_t ALTMODE = 0x00800;
63/** The request is to an uncacheable address. */
64const uint32_t UNCACHEABLE = 0x01000;
65/** The request should not cause a page fault. */
66const uint32_t NO_FAULT = 0x02000;
67/** The request should be prefetched into the exclusive state. */
68const uint32_t PF_EXCLUSIVE = 0x10000;
69/** The request should be marked as LRU. */
70const uint32_t EVICT_NEXT = 0x20000;
71/** The request should ignore unaligned access faults */
72const uint32_t NO_ALIGN_FAULT = 0x40000;
73/** The request was an instruction read. */
74const uint32_t INST_READ = 0x80000;
75/** This request is for a memory swap. */
76const uint32_t MEM_SWAP = 0x100000;
77const uint32_t MEM_SWAP_COND = 0x200000;
78/** The request should ignore unaligned access faults */
79const uint32_t NO_HALF_WORD_ALIGN_FAULT = 0x400000;
80
81
82class Request : public FastAlloc
83{
84 private:
85 /**
86 * The physical address of the request. Valid only if validPaddr
87 * is set. */
88 Addr paddr;
89
90 /**
91 * The size of the request. This field must be set when vaddr or
92 * paddr is written via setVirt() or setPhys(), so it is always
93 * valid as long as one of the address fields is valid. */
94 int size;
95
96 /** Flag structure for the request. */
97 uint32_t flags;
98
99 /**
100 * The time this request was started. Used to calculate
101 * latencies. This field is set to curTick any time paddr or vaddr
102 * is written. */
103 Tick time;
104
105 /** The address space ID. */
106 int asid;
107
108 /** This request is to a memory mapped register. */
109 bool mmapedIpr;
110
111 /** The virtual address of the request. */
112 Addr vaddr;
113
114 /** Extra data for the request, such as the return value of
115 * store conditional or the compare value for a CAS. */
116 uint64_t extraData;
117
118 /** The context ID (for statistics, typically). */
119 int _contextId;
120 /** The thread ID (id within this CPU) */
121 int _threadId;
122
123 /** program counter of initiating access; for tracing/debugging */
124 Addr pc;
125
126 /** Whether or not paddr is valid (has been written yet). */
127 bool validPaddr;
128 /** Whether or not the asid & vaddr are valid. */
129 bool validAsidVaddr;
130 /** Whether or not the sc result is valid. */
131 bool validExData;
132 /** Whether or not the context ID is valid. */
133 bool validContextAndThreadIds;
134 /** Whether or not the pc is valid. */
135 bool validPC;
136
137 public:
138 /** Minimal constructor. No fields are initialized. */
139 Request()
140 : validPaddr(false), validAsidVaddr(false),
141 validExData(false), validContextAndThreadIds(false), validPC(false)
142 {}
143
144 /**
145 * Constructor for physical (e.g. device) requests. Initializes
146 * just physical address, size, flags, and timestamp (to curTick).
147 * These fields are adequate to perform a request. */
148 Request(Addr _paddr, int _size, int _flags)
149 : validContextAndThreadIds(false)
150 { setPhys(_paddr, _size, _flags); }
151
152 Request(int _asid, Addr _vaddr, int _size, int _flags, Addr _pc,
153 int _context_id, int _thread_id)
154 {
155 setThreadContext(_context_id, _thread_id);
156 setVirt(_asid, _vaddr, _size, _flags, _pc);
157 }
158
159 ~Request() {} // for FastAlloc
160
161 /**
162 * Set up CPU and thread numbers. */
163 void setThreadContext(int _context_id, int _thread_id)
164 {
165 _contextId = _context_id;
166 _threadId = _thread_id;
167 validContextAndThreadIds = true;
168 }
169
170 /**
171 * Set up a physical (e.g. device) request in a previously
172 * allocated Request object. */
173 void setPhys(Addr _paddr, int _size, int _flags)
174 {
175 assert(_size >= 0);
176 paddr = _paddr;
177 size = _size;
178 flags = _flags;
179 time = curTick;
180 validPaddr = true;
181 validAsidVaddr = false;
182 validPC = false;
183 validExData = false;
184 mmapedIpr = false;
185 }
186
187 /**
188 * Set up a virtual (e.g., CPU) request in a previously
189 * allocated Request object. */
190 void setVirt(int _asid, Addr _vaddr, int _size, int _flags, Addr _pc)
191 {
192 assert(_size >= 0);
193 asid = _asid;
194 vaddr = _vaddr;
195 size = _size;
196 flags = _flags;
197 pc = _pc;
198 time = curTick;
199 validPaddr = false;
200 validAsidVaddr = true;
201 validPC = true;
202 validExData = false;
203 mmapedIpr = false;
204 }
205
206 /** Set just the physical address. This should only be used to
207 * record the result of a translation, and thus the vaddr must be
208 * valid before this method is called. Otherwise, use setPhys()
209 * to guarantee that the size and flags are also set.
210 */
211 void setPaddr(Addr _paddr)
212 {
213 assert(validAsidVaddr);
214 paddr = _paddr;
215 validPaddr = true;
216 }
217
218 /** Accessor for paddr. */
219 Addr getPaddr() { assert(validPaddr); return paddr; }
220
221 /** Accessor for size. */
222 int getSize() { assert(validPaddr || validAsidVaddr); return size; }
223 /** Accessor for time. */
224 Tick getTime() { assert(validPaddr || validAsidVaddr); return time; }
225 void resetTime() { assert(validPaddr || validAsidVaddr); time = curTick; }
226 void
227 setTime(Tick when)
228 {
229 assert(validPaddr || validAsidVaddr);
230 time = when;
231 }
232
233 /** Accessor for flags. */
234 uint32_t getFlags() { assert(validPaddr || validAsidVaddr); return flags; }
235 /** Accessor for paddr. */
236 void setFlags(uint32_t _flags)
237 { assert(validPaddr || validAsidVaddr); flags = _flags; }
238
239 /** Accessor function for vaddr.*/
240 Addr getVaddr() { assert(validAsidVaddr); return vaddr; }
241
242 /** Accessor function for asid.*/
243 int getAsid() { assert(validAsidVaddr); return asid; }
244
245 /** Accessor function for asi.*/
246 uint8_t getAsi() { assert(validAsidVaddr); return flags & ASI_BITS; }
247
248 /** Accessor function for asi.*/
249 void setAsi(uint8_t a)
250 { assert(validAsidVaddr); flags = (flags & ~ASI_BITS) | a; }
251
252 /** Accessor function for asi.*/
253 bool isMmapedIpr() { assert(validPaddr); return mmapedIpr; }
254
255 /** Accessor function for asi.*/
256 void setMmapedIpr(bool r) { assert(validAsidVaddr); mmapedIpr = r; }
257
258 /** Accessor function to check if sc result is valid. */
259 bool extraDataValid() { return validExData; }
260 /** Accessor function for store conditional return value.*/
261 uint64_t getExtraData() { assert(validExData); return extraData; }
262 /** Accessor function for store conditional return value.*/
263 void setExtraData(uint64_t _extraData)
264 { extraData = _extraData; validExData = true; }
265
266 /** Accessor function for context ID.*/
267 int contextId() { assert(validContextAndThreadIds); return _contextId; }
268 /** Accessor function for thread ID. */
269 int threadId() { assert(validContextAndThreadIds); return _threadId; }
270
271 /** Accessor function for pc.*/
272 Addr getPC() { assert(validPC); return pc; }
273
274 /** Accessor Function to Check Cacheability. */
275 bool isUncacheable() { return (getFlags() & UNCACHEABLE) != 0; }
276
277 bool isInstRead() { return (getFlags() & INST_READ) != 0; }
278
279 bool isLocked() { return (getFlags() & LOCKED) != 0; }
280
281 bool isSwap() { return (getFlags() & MEM_SWAP ||
282 getFlags() & MEM_SWAP_COND); }
283
284 bool isCondSwap() { return (getFlags() & MEM_SWAP_COND) != 0; }
285
286 bool inline isMisaligned() {return (!(getFlags() & NO_ALIGN_FAULT) &&
287 ((vaddr & 1) ||
288 (!(getFlags() & NO_HALF_WORD_ALIGN_FAULT)
289 && (vaddr & 0x2))));}
290
291 friend class Packet;
292};
293
294#endif // __MEM_REQUEST_HH__