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Metavalue cleanup for fetch1.vhdl

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Signed-off-by: Michael Neuling <mikey@neuling.org>
This commit is contained in:
Michael Neuling
2022-07-14 10:31:32 +10:00
parent e440db13d7
commit 9e134f2e2f
1 changed files with 9 additions and 2 deletions
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11
fetch1.vhdl
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@@ -123,15 +123,22 @@ begin
raddr := unsigned(r.nia(BTC_ADDR_BITS + 1 downto 2)) +
to_unsigned(2, BTC_ADDR_BITS);
if advance_nia = '1' then
btc_rd_data <= btc_memory(to_integer(raddr));
btc_rd_valid <= btc_valids(to_integer(raddr));
if is_X(raddr) then
btc_rd_data <= (others => 'X');
btc_rd_valid <= 'X';
else
btc_rd_data <= btc_memory(to_integer(raddr));
btc_rd_valid <= btc_valids(to_integer(raddr));
end if;
end if;
if btc_wr = '1' then
assert not is_X(btc_wr_addr) report "Writing to unknown address" severity FAILURE;
btc_memory(to_integer(unsigned(btc_wr_addr))) <= btc_wr_data;
end if;
if inval_btc = '1' or rst = '1' then
btc_valids <= (others => '0');
elsif btc_wr = '1' then
assert not is_X(btc_wr_addr) report "Writing to unknown address" severity FAILURE;
btc_valids(to_integer(unsigned(btc_wr_addr))) <= '1';
end if;
end if;