riscv/rocket-chip
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refined vector exception interface

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This commit is contained in:
Yunsup Lee 2012-03-03 16:11:54 -08:00
parent e28a551368
commit d4ec7ff4d9
5 changed files with 13 additions and 8 deletions
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1
rocket/src/main/scala/consts.scala
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@ -144,7 +144,6 @@ object Constants
val PCR_VECBANK = UFix(18, 5);
// temporaries for vector, these will go away
val PCR_VEC_CNT = UFix(29, 5)
val PCR_VEC_EADDR = UFix(30, 5)
val PCR_VEC_XCPT = UFix(31, 5)

2
rocket/src/main/scala/cpu.scala
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@ -200,6 +200,8 @@ class rocketProc(resetSignal: Bool = null) extends Component(resetSignal)
// exceptions
vu.io.cpu_exception.addr := dpath.io.vec_iface.eaddr.toUFix
vu.io.cpu_exception.exception := dpath.io.vec_iface.exception
vu.io.cpu_exception.kill := dpath.io.vec_iface.kill
vu.io.cpu_exception.hold := dpath.io.vec_iface.hold
ctrl.io.vec_iface.exception_ack_valid := vu.io.exception_ack_valid
vu.io.exception_ack_ready := ctrl.io.vec_iface.exception_ack_ready
ctrl.io.vec_iface.kill_ack_valid := vu.io.kill_ack_valid

2
rocket/src/main/scala/dpath.scala
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@ -384,7 +384,7 @@ class rocketDpath extends Component
vec.io.wdata := wb_reg_vec_wdata
vec.io.rs2 := wb_reg_rs2
vec.io.vec_eaddr := pcr.io.vec_eaddr
vec.io.vec_exception := pcr.io.vec_exception
vec.io.vec_xcpt := pcr.io.vec_xcpt
wb_wdata :=
Mux(vec.io.wen, Cat(Bits(0,52), vec.io.appvl),

8
rocket/src/main/scala/dpath_util.scala
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@ -80,7 +80,7 @@ class ioDpathPCR extends Bundle()
val vecbank = Bits(8, OUTPUT)
val vecbankcnt = UFix(4, OUTPUT)
val vec_eaddr = Bits(VADDR_BITS, OUTPUT)
val vec_exception = Bool(OUTPUT)
val vec_xcpt = Bits(3, OUTPUT)
}
class rocketDpathPCR extends Component
@ -100,7 +100,7 @@ class rocketDpathPCR extends Component
val reg_ptbr = Reg() { UFix() };
val reg_vecbank = Reg(resetVal = Bits("b1111_1111", 8))
val reg_vec_eaddr = Reg() { Bits() }
val reg_vec_exception = Reg() { Bool() }
val reg_vec_xcpt = Reg() { Bits() }
val reg_error_mode = Reg(resetVal = Bool(false));
val reg_status_vm = Reg(resetVal = Bool(false));
@ -143,7 +143,7 @@ class rocketDpathPCR extends Component
io.vecbankcnt := cnt(3,0)
io.vec_eaddr := reg_vec_eaddr
io.vec_exception := reg_vec_exception
io.vec_xcpt := reg_vec_xcpt
val badvaddr_sign = Mux(io.w.data(VADDR_BITS-1), ~io.w.data(63,VADDR_BITS) === UFix(0), io.w.data(63,VADDR_BITS) != UFix(0))
when (io.badvaddr_wen) {
@ -212,7 +212,7 @@ class rocketDpathPCR extends Component
when (waddr === PCR_PTBR) { reg_ptbr := Cat(wdata(PADDR_BITS-1, PGIDX_BITS), Bits(0, PGIDX_BITS)).toUFix; }
when (waddr === PCR_VECBANK) { reg_vecbank := wdata(7,0) }
when (waddr === PCR_VEC_EADDR) { reg_vec_eaddr := wdata(VADDR_BITS,0) }
when (waddr === PCR_VEC_XCPT) { reg_vec_exception:= wdata(0) }
when (waddr === PCR_VEC_XCPT) { reg_vec_xcpt := wdata(2,0) }
}
rdata := Bits(0, 64)

8
rocket/src/main/scala/dpath_vec.scala
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@ -14,6 +14,8 @@ class ioDpathVecInterface extends Bundle
val vcntq_bits = Bits(SZ_VLEN, OUTPUT)
val eaddr = Bits(64, OUTPUT)
val exception = Bool(OUTPUT)
val kill = Bool(OUTPUT)
val hold = Bool(OUTPUT)
}
class ioDpathVec extends Bundle
@ -29,7 +31,7 @@ class ioDpathVec extends Bundle
val wdata = Bits(64, INPUT)
val rs2 = Bits(64, INPUT)
val vec_eaddr = Bits(64, INPUT)
val vec_exception = Bool(INPUT)
val vec_xcpt = Bits(3, INPUT)
val wen = Bool(OUTPUT)
val appvl = UFix(12, OUTPUT)
}
@ -136,7 +138,9 @@ class rocketDpathVec extends Component
io.iface.vcntq_bits := io.wdata(SZ_VLEN-1, 0)
io.iface.eaddr := io.vec_eaddr
io.iface.exception := io.vec_exception
io.iface.exception := io.vec_xcpt(0)
io.iface.kill := io.vec_xcpt(1)
io.iface.hold := io.vec_xcpt(2)
io.ctrl.valid := io.valid
io.ctrl.inst := io.inst