2 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
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
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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.
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
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22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include "base/intmath.hh"
30 #include "mem/ruby/slicc_interface/RubySlicc_Util.hh"
31 #include "mem/ruby/system/DirectoryMemory.hh"
32 #include "mem/ruby/system/System.hh"
36 int DirectoryMemory::m_num_directories
= 0;
37 int DirectoryMemory::m_num_directories_bits
= 0;
38 uint64_t DirectoryMemory::m_total_size_bytes
= 0;
39 int DirectoryMemory::m_numa_high_bit
= 0;
41 DirectoryMemory::DirectoryMemory(const Params
*p
)
44 m_version
= p
->version
;
45 m_size_bytes
= p
->size
;
46 m_size_bits
= floorLog2(m_size_bytes
);
48 m_use_map
= p
->use_map
;
49 m_map_levels
= p
->map_levels
;
50 m_numa_high_bit
= p
->numa_high_bit
;
54 DirectoryMemory::init()
56 m_num_entries
= m_size_bytes
/ RubySystem::getBlockSizeBytes();
59 int entry_bits
= floorLog2(m_num_entries
);
60 assert(entry_bits
>= m_map_levels
);
61 m_sparseMemory
= new SparseMemory(entry_bits
, m_map_levels
);
63 m_entries
= new Directory_Entry
*[m_num_entries
];
64 for (int i
= 0; i
< m_num_entries
; i
++)
66 m_ram
= g_system_ptr
->getMemoryVector();
70 m_num_directories_bits
= floorLog2(m_num_directories
);
71 m_total_size_bytes
+= m_size_bytes
;
73 if (m_numa_high_bit
== 0) {
74 m_numa_high_bit
= RubySystem::getMemorySizeBits() - 1;
76 assert(m_numa_high_bit
!= 0);
79 DirectoryMemory::~DirectoryMemory()
81 // free up all the directory entries
82 if (m_entries
!= NULL
) {
83 for (uint64 i
= 0; i
< m_num_entries
; i
++) {
84 if (m_entries
[i
] != NULL
) {
89 } else if (m_use_map
) {
90 delete m_sparseMemory
;
95 DirectoryMemory::printConfig(ostream
& out
) const
97 out
<< "DirectoryMemory module config: " << m_name
<< endl
98 << " version: " << m_version
<< endl
99 << " memory_bits: " << m_size_bits
<< endl
100 << " memory_size_bytes: " << m_size_bytes
<< endl
101 << " memory_size_Kbytes: " << double(m_size_bytes
) / (1<<10) << endl
102 << " memory_size_Mbytes: " << double(m_size_bytes
) / (1<<20) << endl
103 << " memory_size_Gbytes: " << double(m_size_bytes
) / (1<<30) << endl
;
108 DirectoryMemory::printGlobalConfig(ostream
& out
)
110 out
<< "DirectoryMemory Global Config: " << endl
;
111 out
<< " number of directory memories: " << m_num_directories
<< endl
;
112 if (m_num_directories
> 1) {
113 out
<< " number of selection bits: " << m_num_directories_bits
<< endl
114 << " selection bits: " << m_numa_high_bit
115 << "-" << m_numa_high_bit
-m_num_directories_bits
118 out
<< " total memory size bytes: " << m_total_size_bytes
<< endl
;
119 out
<< " total memory bits: " << floorLog2(m_total_size_bytes
) << endl
;
123 DirectoryMemory::mapAddressToDirectoryVersion(PhysAddress address
)
125 if (m_num_directories_bits
== 0)
128 uint64 ret
= address
.bitSelect(m_numa_high_bit
- m_num_directories_bits
+ 1,
134 DirectoryMemory::isPresent(PhysAddress address
)
136 bool ret
= (mapAddressToDirectoryVersion(address
) == m_version
);
141 DirectoryMemory::mapAddressToLocalIdx(PhysAddress address
)
144 if (m_num_directories_bits
> 0) {
145 ret
= address
.bitRemove(m_numa_high_bit
- m_num_directories_bits
+ 1,
148 ret
= address
.getAddress();
151 return ret
>> (RubySystem::getBlockSizeBits());
155 DirectoryMemory::lookup(PhysAddress address
)
157 assert(isPresent(address
));
158 Directory_Entry
* entry
;
160 DEBUG_EXPR(CACHE_COMP
, HighPrio
, address
);
163 if (m_sparseMemory
->exist(address
)) {
164 entry
= m_sparseMemory
->lookup(address
);
165 assert(entry
!= NULL
);
167 // Note: SparseMemory internally creates a new Directory Entry
168 m_sparseMemory
->add(address
);
169 entry
= m_sparseMemory
->lookup(address
);
172 idx
= mapAddressToLocalIdx(address
);
173 assert(idx
< m_num_entries
);
174 entry
= m_entries
[idx
];
177 entry
= new Directory_Entry();
178 entry
->getDataBlk().assign(m_ram
->getBlockPtr(address
));
179 m_entries
[idx
] = entry
;
188 DirectoryMemory::lookup(PhysAddress address
)
190 assert(isPresent(address
));
191 Index index
= address
.memoryModuleIndex();
193 if (index
< 0 || index
> m_size
) {
194 WARN_EXPR(address
.getAddress());
197 ERROR_MSG("Directory Memory Assertion: accessing memory out of range");
199 Directory_Entry
* entry
= m_entries
[index
];
201 // allocate the directory entry on demand.
203 entry
= new Directory_Entry
;
204 entry
->getDataBlk().assign(m_ram
->getBlockPtr(address
));
206 // store entry to the table
207 m_entries
[index
] = entry
;
215 DirectoryMemory::invalidateBlock(PhysAddress address
)
218 assert(m_sparseMemory
->exist(address
));
219 m_sparseMemory
->remove(address
);
223 assert(isPresent(address
));
225 Index index
= address
.memoryModuleIndex();
227 if (index
< 0 || index
> m_size
) {
228 ERROR_MSG("Directory Memory Assertion: "
229 "accessing memory out of range.");
232 if (m_entries
[index
] != NULL
){
233 delete m_entries
[index
];
234 m_entries
[index
] = NULL
;
241 DirectoryMemory::print(ostream
& out
) const
246 DirectoryMemory::printStats(ostream
& out
) const
249 m_sparseMemory
->printStats(out
);
254 RubyDirectoryMemoryParams::create()
256 return new DirectoryMemory(this);