riscv/rocket-chip
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Add support for per-way cache metadata

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Adds a new cache parameter (SplitMetadata) and an associated knob.

Closes #62
This commit is contained in:
Albert Magyar
2016-02-29 14:49:18 -08:00
parent a9380a3dc1
commit a80b0e959d
3 changed files with 10 additions and 2 deletions
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9
src/main/scala/Configs.scala
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@@ -110,6 +110,7 @@ class DefaultConfig extends Config (
case RowBits => findBy(CacheName)
case NTLBEntries => findBy(CacheName)
case CacheIdBits => findBy(CacheName)
case SplitMetadata => findBy(CacheName)
case ICacheBufferWays => Knob("L1I_BUFFER_WAYS")
case "L1I" => {
case NSets => Knob("L1I_SETS") //64
@@ -117,6 +118,7 @@ class DefaultConfig extends Config (
case RowBits => 4*site(CoreInstBits)
case NTLBEntries => 8
case CacheIdBits => 0
case SplitMetadata => false
}:PF
case "L1D" => {
case NSets => Knob("L1D_SETS") //64
@@ -124,6 +126,7 @@ class DefaultConfig extends Config (
case RowBits => 2*site(CoreDataBits)
case NTLBEntries => 8
case CacheIdBits => 0
case SplitMetadata => false
}:PF
case ECCCode => None
case Replacer => () => new RandomReplacement(site(NWays))
@@ -295,6 +298,7 @@ class WithL2Cache extends Config(
case NWays => Knob("L2_WAYS")
case RowBits => site(TLKey(site(TLId))).dataBitsPerBeat
case CacheIdBits => log2Ceil(site(NMemoryChannels) * site(NBanksPerMemoryChannel))
case SplitMetadata => Knob("L2_SPLIT_METADATA")
}: PartialFunction[Any,Any]
case NAcquireTransactors => 2
case NSecondaryMisses => 4
@@ -307,7 +311,7 @@ class WithL2Cache extends Config(
case OuterTLId => "L2toMC"})))
case L2Replacer => () => new SeqRandom(site(NWays))
},
knobValues = { case "L2_WAYS" => 8; case "L2_CAPACITY_IN_KB" => 2048 }
knobValues = { case "L2_WAYS" => 8; case "L2_CAPACITY_IN_KB" => 2048; case "L2_SPLIT_METADATA" => false }
)
class WithPLRU extends Config(
@@ -457,3 +461,6 @@ class OneOrEightChannelVLSIConfig extends Config(new WithOneOrMaxChannels ++ new
class SimulateBackupMemConfig extends Config(){ Dump("MEM_BACKUP_EN", true) }
class BackupMemVLSIConfig extends Config(new SimulateBackupMemConfig ++ new DefaultVLSIConfig)
class OneOrEightChannelBackupMemVLSIConfig extends Config(new WithOneOrMaxChannels ++ new With8MemoryChannels ++ new BackupMemVLSIConfig)
class WithSplitL2Metadata extends Config(knobValues = { case "L2_SPLIT_METADATA" => true })
class SplitL2MetadataTestConfig extends Config(new WithSplitL2Metadata ++ new DefaultL2Config)