Cache.py revision 1615 
1from BaseMem import BaseMem
2
3class Prefetch(Enum): vals = ['none', 'tagged', 'stride', 'ghb']
4
5simobj BaseCache(BaseMem):
6    type = 'BaseCache'
7    adaptive_compression = Param.Bool(False,
8        "Use an adaptive compression scheme")
9    assoc = Param.Int("associativity")
10    block_size = Param.Int("block size in bytes")
11    compressed_bus = Param.Bool(False,
12        "This cache connects to a compressed memory")
13    compression_latency = Param.Int(0,
14        "Latency in cycles of compression algorithm")
15    do_copy = Param.Bool(False, "perform fast copies in the cache")
16    hash_delay = Param.Int(1, "time in cycles of hash access")
17    in_bus = Param.Bus(NULL, "incoming bus object")
18    lifo = Param.Bool(False,
19        "whether this NIC partition should use LIFO repl. policy")
20    max_miss_count = Param.Counter(0,
21        "number of misses to handle before calling exit")
22    mshrs = Param.Int("number of MSHRs (max outstanding requests)")
23    out_bus = Param.Bus("outgoing bus object")
24    prioritizeRequests = Param.Bool(False,
25        "always service demand misses first")
26    protocol = Param.CoherenceProtocol(NULL, "coherence protocol to use")
27    repl = Param.Repl(NULL, "replacement policy")
28    size = Param.MemorySize("capacity in bytes")
29    split = Param.Bool(False, "whether or not this cache is split")
30    split_size = Param.Int(0,
31        "How many ways of the cache belong to CPU/LRU partition")
32    store_compressed = Param.Bool(False,
33        "Store compressed data in the cache")
34    subblock_size = Param.Int(0,
35        "Size of subblock in IIC used for compression")
36    tgts_per_mshr = Param.Int("max number of accesses per MSHR")
37    trace_addr = Param.Addr(0, "address to trace")
38    two_queue = Param.Bool(False,
39        "whether the lifo should have two queue replacement")
40    write_buffers = Param.Int(8, "number of write buffers")
41    prefetch_miss = Param.Bool(False,
42         "wheter you are using the hardware prefetcher from Miss stream")
43    prefetch_access = Param.Bool(False,
44         "wheter you are using the hardware prefetcher from Access stream")
45    prefetcher_size = Param.Int(100,
46         "Number of entries in the harware prefetch queue")
47    prefetch_past_page = Param.Bool(False,
48         "Allow prefetches to cross virtual page boundaries")
49    prefetch_serial_squash = Param.Bool(False,
50         "Squash prefetches with a later time on a subsequent miss")
51    prefetch_degree = Param.Int(1,
52         "Degree of the prefetch depth")
53    prefetch_latency = Param.Tick(10,
54         "Latency of the prefetcher")
55    prefetch_policy = Param.Prefetch('none',
56         "Type of prefetcher to use")
57