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VME64x core
Commit 73230942 authored by Tristan Gingold's avatar Tristan Gingold
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vme_bus: cleanup

parent 29b8b02b
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Showing with 17 additions and 20 deletions
hdl/rtl/vme_bus.vhd
View file @ 73230942
......@@ -136,6 +136,7 @@ architecture rtl of vme_bus is
signal vme_idff_lword_n : std_logic;
signal vme_idff_am : std_logic_vector(5 downto 0);
-- As these signals are synchronized, they correspond to latched values.
signal vme_idff_ds_n : std_logic_vector(1 downto 0);
signal vme_idff_write_n : std_logic;
......@@ -321,17 +322,15 @@ begin
decode_start_o <= '0';
-- VME
vme_dtack_oe_o <= '0';
vme_dtack_n_o <= '1';
vme_data_dir_o <= '0';
vme_odff_addr_dir <= '0';
vme_berr_n_o <= '1';
vme_addr_o <= (others => '0');
vme_lword_n_o <= '1';
vme_data_o <= (others => '0');
vme_iackout_n_o <= '1';
s_MBLT_Data <= '0';
s_mainFSMstate <= IDLE;
vme_dtack_oe_o <= '0';
vme_dtack_n_o <= '1';
vme_data_dir_o <= '0';
vme_odff_addr_dir <= '0';
vme_odff_lword_n <= '0';
vme_berr_n_o <= '1';
vme_iackout_n_o <= '1';
s_MBLT_Data <= '0';
s_mainFSMstate <= IDLE;
-- WB
s_wb_start <= '0';
......@@ -526,7 +525,7 @@ begin
-- A Slave MUST NOT respond with a falling edge on DTACK* during
-- an unaligned transfer cycle, if it does not have UAT
-- capability.
if vme_odff_lword_n = '0' and vme_idff_ds_n /= "00" then
if vme_idff_lword_n = '0' and vme_idff_ds_n /= "00" then
-- unaligned.
s_mainFSMstate <= WAIT_END;
else
......@@ -542,10 +541,10 @@ begin
if g_VME32 then
-- only for MBLT
vme_addr_o <= data_reg(63 downto 33);
vme_lword_n_o <= data_reg(32);
vme_odff_addr <= data_reg(63 downto 33);
vme_odff_lword_n <= data_reg(32);
end if;
vme_data_o <= data_reg(31 downto 0);
vme_odff_data <= data_reg(31 downto 0);
if s_transferType = MBLT and vme_idff_write_n = '1' then
-- Prefetch.
......@@ -696,11 +695,6 @@ begin
s_wb_done <= '0';
--if vme_odff_lword_n = '1' and vme_odff_addr(1) = '0' and g_VME32 then
-- -- Word/byte access with A1=0
-- s_locDataIn(31 downto 16) <= vme_odff_data(15 downto 0);
--end if;
if vme_idff_write_n = '0' then
-- Get the data to write (in case of write!).
if g_VME32 and s_transferType = MBLT then
......@@ -893,5 +887,8 @@ begin
else '0';
vme_addr_dir_o <= vme_odff_addr_dir;
vme_addr_o <= vme_odff_addr;
vme_data_o <= vme_odff_data;
vme_lword_n_o <= vme_odff_lword_n;
end rtl;
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