riscv/rocket-chip
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check pc/effective address sign extension

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This commit is contained in:
Andrew Waterman
2012-01-24 00:15:17 -08:00
parent a5a020f97b
commit f1c355e3cd
5 changed files with 43 additions and 40 deletions
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13
rocket/src/main/scala/dpath_util.scala
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@ -53,7 +53,7 @@ class ioDpathPCR extends Bundle()
val exception = Bool(INPUT);
val cause = UFix(5, INPUT);
val badvaddr_wen = Bool(INPUT);
val pc = UFix(VADDR_BITS, INPUT);
val pc = UFix(VADDR_BITS+1, INPUT);
val eret = Bool(INPUT);
val ei = Bool(INPUT);
val di = Bool(INPUT);
@ -121,8 +121,9 @@ class rocketDpathPCR extends Component
}
}
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) {
reg_badvaddr <== io.w.data.toUFix;
reg_badvaddr <== Cat(badvaddr_sign, io.w.data(VADDR_BITS-1,0)).toUFix;
}
when (io.exception && !reg_status_et) {
@ -163,8 +164,8 @@ class rocketDpathPCR extends Component
reg_status_ec <== HAVE_RVC && io.w.data(SR_EC).toBool;
reg_status_et <== io.w.data(SR_ET).toBool;
}
when (io.w.addr === PCR_EPC) { reg_epc <== io.w.data(VADDR_BITS-1,0).toUFix; }
when (io.w.addr === PCR_BADVADDR) { reg_badvaddr <== io.w.data(VADDR_BITS-1,0).toUFix; }
when (io.w.addr === PCR_EPC) { reg_epc <== io.w.data(VADDR_BITS,0).toUFix; }
when (io.w.addr === PCR_BADVADDR) { reg_badvaddr <== io.w.data(VADDR_BITS,0).toUFix; }
when (io.w.addr === PCR_EVEC) { reg_ebase <== io.w.data(VADDR_BITS-1,0).toUFix; }
when (io.w.addr === PCR_COUNT) { reg_count <== io.w.data(31,0).toUFix; }
when (io.w.addr === PCR_COMPARE) { reg_compare <== io.w.data(31,0).toUFix; r_irq_timer <== Bool(false); }
@ -187,8 +188,8 @@ class rocketDpathPCR extends Component
when (!io.r.en) { rdata <== Bits(0,64); }
switch (io.r.addr) {
is (PCR_STATUS) { rdata <== Cat(Bits(0,47), reg_status_vm, reg_status_im, reg_status); }
is (PCR_EPC) { rdata <== Cat(Fill(64-VADDR_BITS, reg_epc(VADDR_BITS-1)), reg_epc); }
is (PCR_BADVADDR) { rdata <== Cat(Fill(64-VADDR_BITS, reg_badvaddr(VADDR_BITS-1)), reg_badvaddr); }
is (PCR_EPC) { rdata <== Cat(Fill(64-VADDR_BITS-1, reg_epc(VADDR_BITS)), reg_epc); }
is (PCR_BADVADDR) { rdata <== Cat(Fill(64-VADDR_BITS-1, reg_badvaddr(VADDR_BITS)), reg_badvaddr); }
is (PCR_EVEC) { rdata <== Cat(Fill(64-VADDR_BITS, reg_ebase(VADDR_BITS-1)), reg_ebase); }
is (PCR_COUNT) { rdata <== Cat(Fill(32, reg_count(31)), reg_count); }
is (PCR_COMPARE) { rdata <== Cat(Fill(32, reg_compare(31)), reg_compare); }