riscv/rocket-chip
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allow back pressure on IPI requests

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This commit is contained in:
Andrew Waterman
2012-07-17 22:52:53 -07:00
parent f633a55722
commit 4e44ed7400
4 changed files with 9 additions and 5 deletions
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6
rocket/src/main/scala/dpath_util.scala
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@ -78,6 +78,7 @@ class ioDpathPCR extends Bundle()
val ptbr_wen = Bool(OUTPUT);
val irq_timer = Bool(OUTPUT);
val irq_ipi = Bool(OUTPUT);
val replay = Bool(OUTPUT)
val vecbank = Bits(OUTPUT, 8)
val vecbankcnt = UFix(OUTPUT, 4)
val vec_appvl = UFix(INPUT, 12)
@ -175,8 +176,9 @@ class rocketDpathPCR extends Component
io.irq_timer := r_irq_timer;
io.irq_ipi := r_irq_ipi;
io.host.ipi.valid := Bool(false)
io.host.ipi.bits := wdata
io.host.ipi.valid := io.w.en && io.w.addr === PCR_SEND_IPI
io.host.ipi.bits := io.w.data
io.replay := io.host.ipi.valid && !io.host.ipi.ready
when (wen) {
when (waddr === PCR_STATUS) {