riscv/rocket-chip
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major refactoring on vector exception interface

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This commit is contained in:
Yunsup Lee 2012-03-09 01:09:22 -08:00
parent 8acbe98f53
commit a1b30282dd
6 changed files with 32 additions and 36 deletions
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5
rocket/src/main/scala/consts.scala
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@ -144,8 +144,9 @@ object Constants
val PCR_VECBANK = UFix(18, 5);
// temporaries for vector, these will go away
val PCR_VEC_EADDR = UFix(30, 5)
val PCR_VEC_XCPT = UFix(31, 5)
val PCR_VEC_BACKUP = UFix(29, 5)
val PCR_VEC_KILL = UFix(30, 5)
val PCR_VEC_HOLD = UFix(31, 5)
// definition of bits in PCR status reg
val SR_ET = 0; // enable traps

15
rocket/src/main/scala/cpu.scala
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@ -197,14 +197,13 @@ class rocketProc(resetSignal: Bool = null) extends Component(resetSignal)
ctrl.io.vec_iface.vfence_ready := vu.io.vec_fence_ready
// exceptions
vu.io.xcpt_backup.exception := dpath.io.vec_iface.exception
vu.io.xcpt_backup.exception_addr := dpath.io.vec_iface.eaddr.toUFix
ctrl.io.vec_iface.exception_ack_valid := vu.io.xcpt_backup.exception_ack_valid
vu.io.xcpt_backup.exception_ack_ready := ctrl.io.vec_iface.exception_ack_ready
vu.io.xcpt_resume.hold := dpath.io.vec_iface.hold
vu.io.xcpt_kill.kill := dpath.io.vec_iface.kill
ctrl.io.vec_iface.kill_ack_valid := vu.io.xcpt_kill.kill_ack_valid
vu.io.xcpt_kill.kill_ack_ready := ctrl.io.vec_iface.kill_ack_ready
vu.io.xcpt.exception := ctrl.io.vec_iface.exception
ctrl.io.vec_iface.exception_ack_valid := vu.io.xcpt.exception_ack_valid
vu.io.xcpt.exception_ack_ready := ctrl.io.vec_iface.exception_ack_ready
vu.io.xcpt.backup := dpath.io.vec_iface.backup
vu.io.xcpt.backup_addr := dpath.io.vec_iface.backup_addr.toUFix
vu.io.xcpt.kill := dpath.io.vec_iface.kill
vu.io.xcpt.hold := dpath.io.vec_iface.hold
// hooking up vector memory interface
val storegen = new StoreDataGen

13
rocket/src/main/scala/ctrl_vec.scala
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@ -39,11 +39,9 @@ class ioCtrlVecInterface extends Bundle
val vfence_ready = Bool(INPUT)
val exception = Bool(OUTPUT)
val exception_ack_valid = Bool(INPUT)
val exception_ack_ready = Bool(OUTPUT)
val kill_ack_valid = Bool(INPUT)
val kill_ack_ready = Bool(OUTPUT)
}
class ioCtrlVec extends Bundle
@ -186,9 +184,6 @@ class rocketCtrlVec extends Component
mask_wb_vec_cmdq_ready && mask_wb_vec_ximm1q_ready && mask_wb_vec_ximm2q_ready && mask_wb_vec_cntq_ready &&
mask_wb_vec_pfcmdq_ready && mask_wb_vec_pfximm1q_ready && mask_wb_vec_pfximm2q_ready && wb_vec_pfcntq_enq
io.iface.exception_ack_ready := Bool(true)
io.iface.kill_ack_ready := Bool(true)
io.replay := valid_common && (
wb_vec_cmdq_enq && !io.iface.vcmdq_ready ||
wb_vec_ximm1q_enq && !io.iface.vximm1q_ready ||
@ -206,8 +201,10 @@ class rocketCtrlVec extends Component
when (do_waitxcpt) { reg_waitxcpt := Bool(true) }
when (io.iface.exception_ack_valid) { reg_waitxcpt := Bool(false) }
when (io.iface.kill_ack_valid) { reg_waitxcpt := Bool(false) }
io.iface.exception := io.exception && io.sr_ev
io.iface.exception_ack_ready := reg_waitxcpt
io.stalld := reg_waitxcpt
io.vfence_ready := io.iface.vfence_ready
io.vfence_ready := !io.sr_ev || io.iface.vfence_ready
}

6
rocket/src/main/scala/dpath.scala
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@ -383,8 +383,10 @@ class rocketDpath extends Component
vec.io.vecbankcnt := pcr.io.vecbankcnt
vec.io.wdata := wb_reg_vec_wdata
vec.io.rs2 := wb_reg_rs2
vec.io.vec_eaddr := pcr.io.vec_eaddr
vec.io.vec_xcpt := pcr.io.vec_xcpt
vec.io.vechold := pcr.io.vechold
vec.io.pcrw.addr := wb_reg_raddr2
vec.io.pcrw.en := io.ctrl.wen_pcr
vec.io.pcrw.data := wb_reg_wdata
wb_wdata :=
Mux(vec.io.wen, Cat(Bits(0,52), vec.io.appvl),

13
rocket/src/main/scala/dpath_util.scala
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@ -79,8 +79,7 @@ class ioDpathPCR extends Bundle()
val irq_ipi = Bool(OUTPUT);
val vecbank = Bits(8, OUTPUT)
val vecbankcnt = UFix(4, OUTPUT)
val vec_eaddr = Bits(VADDR_BITS, OUTPUT)
val vec_xcpt = Bits(3, OUTPUT)
val vechold = Bool(OUTPUT)
}
class rocketDpathPCR extends Component
@ -99,8 +98,7 @@ class rocketDpathPCR extends Component
val reg_k1 = Reg() { Bits() };
val reg_ptbr = Reg() { UFix() };
val reg_vecbank = Reg(resetVal = Bits("b1111_1111", 8))
val reg_vec_eaddr = Reg() { Bits() }
val reg_vec_xcpt = Reg() { Bits() }
val reg_vechold = Reg() { Bool() }
val reg_error_mode = Reg(resetVal = Bool(false));
val reg_status_vm = Reg(resetVal = Bool(false));
@ -142,8 +140,7 @@ class rocketDpathPCR extends Component
cnt = cnt + reg_vecbank(i)
io.vecbankcnt := cnt(3,0)
io.vec_eaddr := reg_vec_eaddr
io.vec_xcpt := reg_vec_xcpt
io.vechold := reg_vechold
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) {
@ -174,6 +171,7 @@ class rocketDpathPCR extends Component
when (io.eret) {
reg_status_s := reg_status_ps;
reg_status_et := Bool(true);
reg_vechold := Bool(false)
}
when (reg_count === reg_compare) {
@ -211,8 +209,7 @@ class rocketDpathPCR extends Component
when (waddr === PCR_K1) { reg_k1 := wdata; }
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_xcpt := wdata(2,0) }
when (waddr === PCR_VEC_HOLD) { reg_vechold := reg_status_ev && wdata(0) }
}
rdata := Bits(0, 64)

16
rocket/src/main/scala/dpath_vec.scala
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@ -12,8 +12,8 @@ class ioDpathVecInterface extends Bundle
val vximm1q_bits = Bits(SZ_VIMM, OUTPUT)
val vximm2q_bits = Bits(SZ_VSTRIDE, OUTPUT)
val vcntq_bits = Bits(SZ_VLEN, OUTPUT)
val eaddr = Bits(64, OUTPUT)
val exception = Bool(OUTPUT)
val backup = Bool(OUTPUT)
val backup_addr = Bits(64, OUTPUT)
val kill = Bool(OUTPUT)
val hold = Bool(OUTPUT)
}
@ -30,8 +30,8 @@ class ioDpathVec extends Bundle
val vecbankcnt = UFix(4, INPUT)
val wdata = Bits(64, INPUT)
val rs2 = Bits(64, INPUT)
val vec_eaddr = Bits(64, INPUT)
val vec_xcpt = Bits(3, INPUT)
val vechold = Bool(INPUT)
val pcrw = new ioWritePort()
val wen = Bool(OUTPUT)
val appvl = UFix(12, OUTPUT)
}
@ -137,10 +137,10 @@ 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_xcpt(0)
io.iface.kill := io.vec_xcpt(1)
io.iface.hold := io.vec_xcpt(2)
io.iface.backup := io.pcrw.en && (io.pcrw.addr === PCR_VEC_BACKUP)
io.iface.backup_addr := io.pcrw.data
io.iface.kill := io.pcrw.en && (io.pcrw.addr === PCR_VEC_KILL)
io.iface.hold := io.vechold
io.ctrl.valid := io.valid
io.ctrl.inst := io.inst