riscv/rocket-chip
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add stall logic for vector command queues

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This commit is contained in:
Yunsup Lee 2012-02-15 14:48:41 -08:00
parent 32bdf5098a
commit 258d050e1b
2 changed files with 19 additions and 5 deletions
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5
rocket/src/main/scala/ctrl.scala
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@ -572,6 +572,8 @@ class rocketCtrl extends Component
io.fpu.dec.wen && fp_sboard.io.r(3).data
}
var vec_replay = Bool(false)
if (HAVE_VEC)
{
// vector control
@ -579,6 +581,7 @@ class rocketCtrl extends Component
io.vec_dpath <> vec.io.dpath
io.vec_iface <> vec.io.iface
vec_replay = vec.io.replay
vec.io.sr_ev := io.dpath.status(SR_EV)
}
@ -655,7 +658,7 @@ class rocketCtrl extends Component
mem_reg_replay := replay_ex && !take_pc_wb;
mem_reg_kill := kill_ex;
wb_reg_replay := replay_mem && !take_pc_wb;
wb_reg_replay := replay_mem && !take_pc_wb || vec_replay;
wb_reg_exception := mem_exception && !take_pc_wb;
wb_reg_cause := mem_cause;

19
rocket/src/main/scala/ctrl_vec.scala
View File

@ -31,6 +31,7 @@ class ioCtrlVec extends Bundle
val dpath = new ioCtrlDpathVec()
val iface = new ioCtrlVecInterface()
val sr_ev = Bool(INPUT)
val replay = Bool(OUTPUT)
}
class rocketCtrlVec extends Component
@ -88,16 +89,26 @@ class rocketCtrlVec extends Component
))
val wb_vec_val :: wb_sel_vcmd :: wb_sel_vimm :: wb_vec_wen :: wb_vec_fn :: wb_vec_appvlmask :: veccs0 = veccs
val wb_vec_cmdq_val :: wb_vec_ximm1q_val :: wb_vec_ximm2q_val :: Nil = veccs0
val wb_vec_cmdq_enq :: wb_vec_ximm1q_enq :: wb_vec_ximm2q_enq :: Nil = veccs0
val valid_common = io.dpath.valid && io.sr_ev && wb_vec_val.toBool && !(wb_vec_appvlmask.toBool && io.dpath.appvl0)
io.iface.vcmdq_valid := valid_common && wb_vec_cmdq_val
io.iface.vximm1q_valid := valid_common && wb_vec_ximm1q_val
io.iface.vximm2q_valid := valid_common && wb_vec_ximm2q_val
val mask_wb_vec_cmdq_ready = !wb_vec_cmdq_enq || io.iface.vcmdq_ready
val mask_wb_vec_ximm1q_ready = !wb_vec_ximm1q_enq || io.iface.vximm1q_ready
val mask_wb_vec_ximm2q_ready = !wb_vec_ximm2q_enq || io.iface.vximm2q_ready
io.dpath.wen := wb_vec_wen.toBool
io.dpath.fn := wb_vec_fn
io.dpath.sel_vcmd := wb_sel_vcmd
io.dpath.sel_vimm := wb_sel_vimm
io.iface.vcmdq_valid := valid_common && wb_vec_cmdq_enq && mask_wb_vec_ximm1q_ready && mask_wb_vec_ximm2q_ready
io.iface.vximm1q_valid := valid_common && mask_wb_vec_cmdq_ready && wb_vec_ximm1q_enq && mask_wb_vec_ximm2q_ready
io.iface.vximm2q_valid := valid_common && mask_wb_vec_cmdq_ready && mask_wb_vec_ximm1q_ready && wb_vec_ximm2q_enq
io.replay := valid_common && (
wb_vec_cmdq_enq && !io.iface.vcmdq_ready ||
wb_vec_ximm1q_enq && !io.iface.vximm1q_ready ||
wb_vec_ximm2q_enq && !io.iface.vximm2q_ready
)
}