46 lines
1.2 KiB
Scala
46 lines
1.2 KiB
Scala
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// See LICENSE for license details.
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package rocket
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import Chisel._
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import Util._
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import cde.Parameters
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class BPControl extends Bundle {
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val matchcond = UInt(width = 2)
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val m = Bool()
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val h = Bool()
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val s = Bool()
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val u = Bool()
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val r = Bool()
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val w = Bool()
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val x = Bool()
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}
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class BreakpointUnit(implicit p: Parameters) extends CoreModule()(p) {
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val io = new Bundle {
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val bpcontrol = Vec(p(NBreakpoints), new BPControl).asInput
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val bpaddress = Vec(p(NBreakpoints), UInt(width = vaddrBits)).asInput
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val pc = UInt(INPUT, vaddrBits)
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val ea = UInt(INPUT, vaddrBits)
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val xcpt_if = Bool(OUTPUT)
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val xcpt_ld = Bool(OUTPUT)
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val xcpt_st = Bool(OUTPUT)
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}
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io.xcpt_if := false
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io.xcpt_ld := false
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io.xcpt_st := false
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for (((bpc, bpa), i) <- io.bpcontrol zip io.bpaddress zipWithIndex) {
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var mask: UInt = bpc.matchcond(1)
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for (i <- 1 until log2Ceil(16))
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mask = Cat(mask(i-1) && bpa(i-1), mask)
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def matches(x: UInt) = (~x | mask) === (~bpa | mask)
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when (matches(io.pc) && bpc.x) { io.xcpt_if := true }
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when (matches(io.ea) && bpc.r) { io.xcpt_ld := true }
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when (matches(io.ea) && bpc.w) { io.xcpt_st := true }
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}
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}
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