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rocket-chip
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RocketChip: add ahb mem interface

This commit is contained in:
Wesley W. Terpstra 2016-06-01 15:41:58 -07:00 committed by Andrew Waterman
parent d2b505f2d2
commit 3e0ec855cf
1 changed files with 18 additions and 3 deletions
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21
src/main/scala/RocketChip.scala
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@ -59,7 +59,10 @@ trait HasTopLevelParameters {
p(TLKey("L1toL2")).nCachelessClients - p(ExtraL1Clients)
lazy val htifW = p(HtifKey).width
lazy val csrAddrBits = 12
lazy val tMemChannels = p(TMemoryChannels)
lazy val nMemChannels = p(NMemoryChannels)
lazy val nMemAXIChannels = if (tMemChannels == BusType.AXI) nMemChannels else 0
lazy val nMemAHBChannels = if (tMemChannels == BusType.AHB) nMemChannels else 0
lazy val nBanksPerMemChannel = p(NBanksPerMemoryChannel)
lazy val nBanks = nMemChannels*nBanksPerMemChannel
lazy val lsb = p(BankIdLSB)
@ -88,7 +91,8 @@ class BasicTopIO(implicit val p: Parameters) extends ParameterizedBundle()(p)
}
class TopIO(implicit p: Parameters) extends BasicTopIO()(p) {
val mem_axi = Vec(nMemChannels, new NastiIO)
val mem_axi = Vec(nMemAXIChannels, new NastiIO)
val mem_ahb = Vec(nMemAHBChannels, new HastiMasterIO)
val interrupts = Vec(p(NExtInterrupts), Bool()).asInput
val mmio_axi = Vec(p(NExtMMIOAXIChannels), new NastiIO)
val mmio_ahb = Vec(p(NExtMMIOAHBChannels), new HastiMasterIO)
@ -158,6 +162,7 @@ class Top(topParams: Parameters) extends Module with HasTopLevelParameters {
io.mmio_axi <> uncore.io.mmio_axi
io.mmio_ahb <> uncore.io.mmio_ahb
io.mem_axi <> uncore.io.mem_axi
io.mem_ahb <> uncore.io.mem_ahb
}
/** Wrapper around everything that isn't a Tile.
@ -169,7 +174,8 @@ class Uncore(implicit val p: Parameters) extends Module
with HasTopLevelParameters {
val io = new Bundle {
val host = new HostIO(htifW)
val mem_axi = Vec(nMemChannels, new NastiIO)
val mem_axi = Vec(nMemAXIChannels, new NastiIO)
val mem_ahb = Vec(nMemAHBChannels, new HastiMasterIO)
val tiles_cached = Vec(nCachedTilePorts, new ClientTileLinkIO).flip
val tiles_uncached = Vec(nUncachedTilePorts, new ClientUncachedTileLinkIO).flip
val prci = Vec(nTiles, new PRCITileIO).asOutput
@ -194,6 +200,7 @@ class Uncore(implicit val p: Parameters) extends Module
// Wire the htif to the memory port(s) and host interface
io.mem_axi <> outmemsys.io.mem_axi
io.mem_ahb <> outmemsys.io.mem_ahb
if(p(UseHtifClockDiv)) {
VLSIUtils.padOutHTIFWithDividedClock(htif.io.host, scrFile.io.scr, io.host, htifW)
} else {
@ -270,7 +277,8 @@ class OuterMemorySystem(implicit val p: Parameters) extends Module with HasTopLe
val tiles_uncached = Vec(nUncachedTilePorts, new ClientUncachedTileLinkIO).flip
val htif_uncached = (new ClientUncachedTileLinkIO).flip
val incoherent = Vec(nTiles, Bool()).asInput
val mem_axi = Vec(nMemChannels, new NastiIO)
val mem_axi = Vec(nMemAXIChannels, new NastiIO)
val mem_ahb = Vec(nMemAHBChannels, new HastiMasterIO)
val mmio = new ClientUncachedTileLinkIO()(p.alterPartial({case TLId => "L2toMMIO"}))
}
@ -332,4 +340,11 @@ class OuterMemorySystem(implicit val p: Parameters) extends Module with HasTopLe
nasti.ar.bits.cache := UInt("b0011")
nasti.aw.bits.cache := UInt("b0011")
}
// Abuse the fact that zip takes the shorter of the two lists
for ((ahb, tl) <- io.mem_ahb zip mem_ic.io.out) {
val bridge = Module(new AHBBridge)
ahb <> bridge.io.ahb
bridge.io.tl <> tl
}
}