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VME64x core
Commit 010af550 authored by Tristan Gingold's avatar Tristan Gingold
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irq controller: makes use of registers more explicit.

parent 74e4bdd3
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Showing with 16 additions and 2 deletions
hdl/vme64x-core/rtl/VME_IRQ_Controller.vhd
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......@@ -197,9 +197,23 @@ begin
if s_irq_pending = '0' then
VME_IRQ_n_o <= (others => '1');
if INT_Req_i = '1' and retry_mask = '1' and INT_Level_i /= "000" then
if INT_Req_i = '1' and retry_mask = '1' then
s_irq_pending <= '1';
VME_IRQ_n_o (to_integer(unsigned(INT_Level_i))) <= '0';
-- Explicit decoding
case INT_Level_i is
when "001" => VME_IRQ_n_o <= "1111110";
when "010" => VME_IRQ_n_o <= "1111101";
when "011" => VME_IRQ_n_o <= "1111011";
when "100" => VME_IRQ_n_o <= "1110111";
when "101" => VME_IRQ_n_o <= "1101111";
when "110" => VME_IRQ_n_o <= "1011111";
when "111" => VME_IRQ_n_o <= "0111111";
when others =>
-- Incorrect value for INT_Level_i, ignore it.
VME_IRQ_n_o <= "1111111";
s_irq_pending <= '0';
end case;
end if;
else
if irq_ack_i = '1' then
......
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