Cleanup some 'U' state issues

Signed-off-by: Michael Neuling <mikey@neuling.org>
caravel-20210114
Michael Neuling 4 years ago committed by Anton Blanchard
parent 55b6f8be52
commit 1ee4995cd8

@ -624,15 +624,15 @@ begin
hit := '1'; hit := '1';
end if; end if;
end loop; end loop;
tlb_hit <= hit and r0_valid; tlb_hit <= hit and r0_valid and r0.req.virt_mode;
tlb_hit_way <= hitway; tlb_hit_way <= hitway;
if tlb_hit = '1' then if tlb_hit = '1' then
pte <= read_tlb_pte(hitway, tlb_pte_way); pte <= read_tlb_pte(hitway, tlb_pte_way);
else else
pte <= (others => '0'); pte <= (others => '0');
end if; end if;
valid_ra <= tlb_hit or not r0.req.virt_mode; valid_ra <= tlb_hit or (r0_valid and not r0.req.virt_mode);
if r0.req.virt_mode = '1' then if tlb_hit = '1' then
ra <= pte(REAL_ADDR_BITS - 1 downto TLB_LG_PGSZ) & ra <= pte(REAL_ADDR_BITS - 1 downto TLB_LG_PGSZ) &
r0.req.addr(TLB_LG_PGSZ - 1 downto ROW_OFF_BITS) & r0.req.addr(TLB_LG_PGSZ - 1 downto ROW_OFF_BITS) &
(ROW_OFF_BITS-1 downto 0 => '0'); (ROW_OFF_BITS-1 downto 0 => '0');
@ -847,7 +847,7 @@ begin
-- work out whether we have permission for this access -- work out whether we have permission for this access
-- NB we don't yet implement AMR, thus no KUAP -- NB we don't yet implement AMR, thus no KUAP
rc_ok <= perm_attr.reference and (r0.req.load or perm_attr.changed); rc_ok <= perm_attr.reference and (r0.req.load or perm_attr.changed);
perm_ok <= (r0.req.priv_mode or not perm_attr.priv) and perm_ok <= ((r0.req.priv_mode and r0.req.valid) or not perm_attr.priv) and
(perm_attr.wr_perm or (r0.req.load and perm_attr.rd_perm)); (perm_attr.wr_perm or (r0.req.load and perm_attr.rd_perm));
access_ok <= valid_ra and perm_ok and rc_ok; access_ok <= valid_ra and perm_ok and rc_ok;



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