Caches.py revision 10820 
1# Copyright (c) 2012 ARM Limited
2# All rights reserved.
3#
4# The license below extends only to copyright in the software and shall
5# not be construed as granting a license to any other intellectual
6# property including but not limited to intellectual property relating
7# to a hardware implementation of the functionality of the software
8# licensed hereunder.  You may use the software subject to the license
9# terms below provided that you ensure that this notice is replicated
10# unmodified and in its entirety in all distributions of the software,
11# modified or unmodified, in source code or in binary form.
12#
13# Copyright (c) 2006-2007 The Regents of The University of Michigan
14# All rights reserved.
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16# Redistribution and use in source and binary forms, with or without
17# modification, are permitted provided that the following conditions are
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23# neither the name of the copyright holders nor the names of its
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25# this software without specific prior written permission.
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27# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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38#
39# Authors: Lisa Hsu
40
41from m5.objects import *
42
43# Base implementations of L1, L2, IO and TLB-walker caches. There are
44# used in the regressions and also as base components in the
45# system-configuration scripts. The values are meant to serve as a
46# starting point, and specific parameters can be overridden in the
47# specific instantiations.
48
49class L1Cache(BaseCache):
50    assoc = 2
51    hit_latency = 2
52    response_latency = 2
53    mshrs = 4
54    tgts_per_mshr = 20
55    is_top_level = True
56
57class L2Cache(BaseCache):
58    assoc = 8
59    hit_latency = 20
60    response_latency = 20
61    mshrs = 20
62    tgts_per_mshr = 12
63    write_buffers = 8
64
65class IOCache(BaseCache):
66    assoc = 8
67    hit_latency = 50
68    response_latency = 50
69    mshrs = 20
70    size = '1kB'
71    tgts_per_mshr = 12
72    forward_snoops = False
73    is_top_level = True
74
75class PageTableWalkerCache(BaseCache):
76    assoc = 2
77    hit_latency = 2
78    response_latency = 2
79    mshrs = 10
80    size = '1kB'
81    tgts_per_mshr = 12
82    forward_snoops = False
83    is_top_level = True
84