riscv/rocket-chip
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Don't register interrupts in CSRFile

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They are usually registered outside the tile in a CDC.
This commit is contained in:
Andrew Waterman 2017-09-29 12:30:32 -07:00
parent 5cfe070932
commit 2786e42d99
1 changed files with 6 additions and 9 deletions
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15
src/main/scala/rocket/CSR.scala
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@ -222,7 +222,6 @@ class CSRFile(perfEventSets: EventSets = new EventSets(Seq()))(implicit p: Param
reset_dcsr.xdebugver := 1
reset_dcsr.prv := PRV.M
val reg_dcsr = Reg(init=reset_dcsr)
val reg_debugint = Reg(Bool())
val (supported_interrupts, delegable_interrupts) = {
val sup = Wire(new MIP)
@ -304,13 +303,17 @@ class CSRFile(perfEventSets: EventSets = new EventSets(Seq()))(implicit p: Param
val hpm_mask = reg_mcounteren & Mux((!usingVM).B || reg_mstatus.prv === PRV.S, delegable_counters.U, reg_scounteren)
val mip = Wire(init=reg_mip)
mip.lip := (io.interrupts.lip: Seq[Bool])
mip.mtip := io.interrupts.mtip
mip.msip := io.interrupts.msip
mip.meip := io.interrupts.meip
// seip is the OR of reg_mip.seip and the actual line from the PLIC
io.interrupts.seip.foreach { mip.seip := reg_mip.seip || RegNext(_) }
mip.rocc := io.rocc_interrupt
val read_mip = mip.asUInt & supported_interrupts
val pending_interrupts = read_mip & reg_mie
val d_interrupts = reg_debugint << CSR.debugIntCause
val d_interrupts = io.interrupts.debug << CSR.debugIntCause
val m_interrupts = Mux(reg_mstatus.prv <= PRV.S || (reg_mstatus.prv === PRV.M && reg_mstatus.mie), pending_interrupts & ~reg_mideleg, UInt(0))
val s_interrupts = Mux(reg_mstatus.prv < PRV.S || (reg_mstatus.prv === PRV.S && reg_mstatus.sie), pending_interrupts & reg_mideleg, UInt(0))
val (anyInterrupt, whichInterrupt) = chooseInterrupt(Seq(s_interrupts, m_interrupts, d_interrupts))
@ -506,7 +509,7 @@ class CSRFile(perfEventSets: EventSets = new EventSets(Seq()))(implicit p: Param
assert(PopCount(insn_ret :: insn_call :: insn_break :: io.exception :: Nil) <= 1, "these conditions must be mutually exclusive")
when (insn_wfi && !io.singleStep && !reg_debug) { reg_wfi := true }
when (pending_interrupts.orR || exception || reg_debugint) { reg_wfi := false }
when (pending_interrupts.orR || exception || io.interrupts.debug) { reg_wfi := false }
assert(!reg_wfi || io.retire === UInt(0))
when (io.retire(0) || exception) { reg_singleStepped := true }
@ -719,12 +722,6 @@ class CSRFile(perfEventSets: EventSets = new EventSets(Seq()))(implicit p: Param
}
}
reg_mip.lip := (io.interrupts.lip: Seq[Bool])
reg_mip.mtip := io.interrupts.mtip
reg_mip.msip := io.interrupts.msip
reg_mip.meip := io.interrupts.meip
reg_debugint := io.interrupts.debug
if (!usingVM) {
reg_mideleg := 0
reg_medeleg := 0