Arbiters.md

Rocket/util/Arbiters

Rocket extended arbiters. Utilizing the Chisel2 compatability layer.

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class HellaPeekingArbiter

A arbiter support bursts of variable length.

class HellaPeekingArbiter[T <: Data](
      typ: T, arbN: Int,
      canUnlock: T => Bool,
      needsLock: Option[T => Bool] = None,
      rr: Boolean = false)
    extends HellaLockingArbiter(typ, arbN, rr)

• I/O, type and Paramter

name	type	direction	description
T	Data	type	payload type
typ	T	param	type parameter
arbN	Int	param	number of ports
canUnlock	T => Bool	param	function to detect tail
needsLock	Option[T => Bool] = None	param	function to detect burst
rr	Boolean = false	param	whether to use round-robin (static by default)
in	Vec[DecoupledIO[T]]	I	arbiter input ports
out	DecoupledIO[T]	O	arbiter output port

class HellaCountingArbiter

A arbiter support bursts of constant length.

class HellaCountingArbiter[T <: Data](
      typ: T, arbN: Int, count: Int,
      val needsLock: Option[T => Bool] = None,
      rr: Boolean = false)
    extends HellaLockingArbiter(typ, arbN, rr)

• I/O, type and Paramter

name	type	direction	description
T	Data	type	payload type
typ	T	param	type parameter
arbN	Int	param	number of ports
count	Int	param	number of beat in a burst
needsLock	Option[T => Bool] = None	param	function to detect burst
rr	Boolean = false	param	whether to use round-robin (static by default)
in	Vec[DecoupledIO[T]]	I	arbiter input ports
out	DecoupledIO[T]	O	arbiter output port

_{Last updated: 09/07/2017
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