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Merge pull request #198 from ozbenh/litedram

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Litedram: Timing improvements
pull/206/head
Paul Mackerras 5 years ago committed by GitHub
parent 7577cb18fb 15467fe536
commit 41d28bbdfc
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 682 additions and 481 deletions
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4
dram_tb.vhdl
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@ -236,14 +236,14 @@ begin
wb_read(a);
wait_acks(1);
read_data(d);
assert d = x"0123456789abcdef" report "bad data" severity failure;
assert d = x"0123456789abcdef" report "bad data, got " & to_hstring(d) severity failure;

report "Simple read hit...";
clr_acks;
wb_read(a);
wait_acks(1);
read_data(d);
assert d = x"0123456789abcdef" report "bad data" severity failure;
assert d = x"0123456789abcdef" report "bad data, got " & to_hstring(d) severity failure;

report "Back to back 4 stores 4 reads on hit...";
clr_acks;

510
fpga/arty_a7.xdc
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@ -1,232 +1,298 @@
################################################################################
# clkin, reset, uart pins...
################################################################################

set_property -dict { PACKAGE_PIN E3 IOSTANDARD LVCMOS33 } [get_ports { ext_clk }];
create_clock -add -name sys_clk_pin -period 10.00 -waveform {0 5} [get_ports { ext_clk }];

set_property -dict { PACKAGE_PIN C2 IOSTANDARD LVCMOS33 } [get_ports { ext_rst }];

set_property -dict { PACKAGE_PIN D10 IOSTANDARD LVCMOS33 } [get_ports { uart_main_tx }];
set_property -dict { PACKAGE_PIN A9 IOSTANDARD LVCMOS33 } [get_ports { uart_main_rx }];

##Pmod Header JC: UART (bottom)
################################################################################
# Pmod Header JC: UART (bottom)
################################################################################

set_property -dict { PACKAGE_PIN U14 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_cts_n }];
set_property -dict { PACKAGE_PIN V14 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_tx }];
set_property -dict { PACKAGE_PIN T13 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_rx }];
set_property -dict { PACKAGE_PIN U13 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_rts_n }];
#set_property -dict { PACKAGE_PIN U14 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_cts_n }];
#set_property -dict { PACKAGE_PIN V14 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_tx }];
#set_property -dict { PACKAGE_PIN T13 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_rx }];
#set_property -dict { PACKAGE_PIN U13 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_rts_n }];

################################################################################
# RGB LEDs
################################################################################

# LEDs
set_property -dict { PACKAGE_PIN E1 IOSTANDARD LVCMOS33 } [get_ports { led0_b }];
set_property -dict { PACKAGE_PIN F6 IOSTANDARD LVCMOS33 } [get_ports { led0_g }];
set_property -dict { PACKAGE_PIN G6 IOSTANDARD LVCMOS33 } [get_ports { led0_r }];

################################################################################
# DRAM (generated by LiteX)
## ddram:0.a
set_property LOC R2 [get_ports ddram_a[0]]
set_property SLEW FAST [get_ports ddram_a[0]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[0]]
## ddram:0.a
set_property LOC M6 [get_ports ddram_a[1]]
set_property SLEW FAST [get_ports ddram_a[1]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[1]]
## ddram:0.a
set_property LOC N4 [get_ports ddram_a[2]]
set_property SLEW FAST [get_ports ddram_a[2]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[2]]
## ddram:0.a
set_property LOC T1 [get_ports ddram_a[3]]
set_property SLEW FAST [get_ports ddram_a[3]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[3]]
## ddram:0.a
set_property LOC N6 [get_ports ddram_a[4]]
set_property SLEW FAST [get_ports ddram_a[4]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[4]]
## ddram:0.a
set_property LOC R7 [get_ports ddram_a[5]]
set_property SLEW FAST [get_ports ddram_a[5]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[5]]
## ddram:0.a
set_property LOC V6 [get_ports ddram_a[6]]
set_property SLEW FAST [get_ports ddram_a[6]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[6]]
## ddram:0.a
set_property LOC U7 [get_ports ddram_a[7]]
set_property SLEW FAST [get_ports ddram_a[7]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[7]]
## ddram:0.a
set_property LOC R8 [get_ports ddram_a[8]]
set_property SLEW FAST [get_ports ddram_a[8]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[8]]
## ddram:0.a
set_property LOC V7 [get_ports ddram_a[9]]
set_property SLEW FAST [get_ports ddram_a[9]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[9]]
## ddram:0.a
set_property LOC R6 [get_ports ddram_a[10]]
set_property SLEW FAST [get_ports ddram_a[10]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[10]]
## ddram:0.a
set_property LOC U6 [get_ports ddram_a[11]]
set_property SLEW FAST [get_ports ddram_a[11]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[11]]
## ddram:0.a
set_property LOC T6 [get_ports ddram_a[12]]
set_property SLEW FAST [get_ports ddram_a[12]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[12]]
## ddram:0.a
set_property LOC T8 [get_ports ddram_a[13]]
set_property SLEW FAST [get_ports ddram_a[13]]
set_property IOSTANDARD SSTL135 [get_ports ddram_a[13]]
## ddram:0.ba
set_property LOC R1 [get_ports ddram_ba[0]]
set_property SLEW FAST [get_ports ddram_ba[0]]
set_property IOSTANDARD SSTL135 [get_ports ddram_ba[0]]
## ddram:0.ba
set_property LOC P4 [get_ports ddram_ba[1]]
set_property SLEW FAST [get_ports ddram_ba[1]]
set_property IOSTANDARD SSTL135 [get_ports ddram_ba[1]]
## ddram:0.ba
set_property LOC P2 [get_ports ddram_ba[2]]
set_property SLEW FAST [get_ports ddram_ba[2]]
set_property IOSTANDARD SSTL135 [get_ports ddram_ba[2]]
## ddram:0.ras_n
set_property LOC P3 [get_ports ddram_ras_n]
set_property SLEW FAST [get_ports ddram_ras_n]
set_property IOSTANDARD SSTL135 [get_ports ddram_ras_n]
## ddram:0.cas_n
set_property LOC M4 [get_ports ddram_cas_n]
set_property SLEW FAST [get_ports ddram_cas_n]
set_property IOSTANDARD SSTL135 [get_ports ddram_cas_n]
## ddram:0.we_n
set_property LOC P5 [get_ports ddram_we_n]
set_property SLEW FAST [get_ports ddram_we_n]
set_property IOSTANDARD SSTL135 [get_ports ddram_we_n]
## ddram:0.cs_n
set_property LOC U8 [get_ports ddram_cs_n]
set_property SLEW FAST [get_ports ddram_cs_n]
set_property IOSTANDARD SSTL135 [get_ports ddram_cs_n]
## ddram:0.dm
set_property LOC L1 [get_ports ddram_dm[0]]
set_property SLEW FAST [get_ports ddram_dm[0]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dm[0]]
## ddram:0.dm
set_property LOC U1 [get_ports ddram_dm[1]]
set_property SLEW FAST [get_ports ddram_dm[1]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dm[1]]
## ddram:0.dq
set_property LOC K5 [get_ports ddram_dq[0]]
set_property SLEW FAST [get_ports ddram_dq[0]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[0]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[0]]
## ddram:0.dq
set_property LOC L3 [get_ports ddram_dq[1]]
set_property SLEW FAST [get_ports ddram_dq[1]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[1]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[1]]
## ddram:0.dq
set_property LOC K3 [get_ports ddram_dq[2]]
set_property SLEW FAST [get_ports ddram_dq[2]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[2]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[2]]
## ddram:0.dq
set_property LOC L6 [get_ports ddram_dq[3]]
set_property SLEW FAST [get_ports ddram_dq[3]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[3]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[3]]
## ddram:0.dq
set_property LOC M3 [get_ports ddram_dq[4]]
set_property SLEW FAST [get_ports ddram_dq[4]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[4]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[4]]
## ddram:0.dq
set_property LOC M1 [get_ports ddram_dq[5]]
set_property SLEW FAST [get_ports ddram_dq[5]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[5]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[5]]
## ddram:0.dq
set_property LOC L4 [get_ports ddram_dq[6]]
set_property SLEW FAST [get_ports ddram_dq[6]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[6]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[6]]
## ddram:0.dq
set_property LOC M2 [get_ports ddram_dq[7]]
set_property SLEW FAST [get_ports ddram_dq[7]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[7]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[7]]
## ddram:0.dq
set_property LOC V4 [get_ports ddram_dq[8]]
set_property SLEW FAST [get_ports ddram_dq[8]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[8]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[8]]
## ddram:0.dq
set_property LOC T5 [get_ports ddram_dq[9]]
set_property SLEW FAST [get_ports ddram_dq[9]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[9]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[9]]
## ddram:0.dq
set_property LOC U4 [get_ports ddram_dq[10]]
set_property SLEW FAST [get_ports ddram_dq[10]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[10]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[10]]
## ddram:0.dq
set_property LOC V5 [get_ports ddram_dq[11]]
set_property SLEW FAST [get_ports ddram_dq[11]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[11]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[11]]
## ddram:0.dq
set_property LOC V1 [get_ports ddram_dq[12]]
set_property SLEW FAST [get_ports ddram_dq[12]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[12]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[12]]
## ddram:0.dq
set_property LOC T3 [get_ports ddram_dq[13]]
set_property SLEW FAST [get_ports ddram_dq[13]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[13]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[13]]
## ddram:0.dq
set_property LOC U3 [get_ports ddram_dq[14]]
set_property SLEW FAST [get_ports ddram_dq[14]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[14]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[14]]
## ddram:0.dq
set_property LOC R3 [get_ports ddram_dq[15]]
set_property SLEW FAST [get_ports ddram_dq[15]]
set_property IOSTANDARD SSTL135 [get_ports ddram_dq[15]]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports ddram_dq[15]]
## ddram:0.dqs_p
set_property LOC N2 [get_ports ddram_dqs_p[0]]
set_property SLEW FAST [get_ports ddram_dqs_p[0]]
set_property IOSTANDARD DIFF_SSTL135 [get_ports ddram_dqs_p[0]]
## ddram:0.dqs_p
set_property LOC U2 [get_ports ddram_dqs_p[1]]
set_property SLEW FAST [get_ports ddram_dqs_p[1]]
set_property IOSTANDARD DIFF_SSTL135 [get_ports ddram_dqs_p[1]]
## ddram:0.dqs_n
set_property LOC N1 [get_ports ddram_dqs_n[0]]
set_property SLEW FAST [get_ports ddram_dqs_n[0]]
set_property IOSTANDARD DIFF_SSTL135 [get_ports ddram_dqs_n[0]]
## ddram:0.dqs_n
set_property LOC V2 [get_ports ddram_dqs_n[1]]
set_property SLEW FAST [get_ports ddram_dqs_n[1]]
set_property IOSTANDARD DIFF_SSTL135 [get_ports ddram_dqs_n[1]]
## ddram:0.clk_p
set_property LOC U9 [get_ports ddram_clk_p]
set_property SLEW FAST [get_ports ddram_clk_p]
set_property IOSTANDARD DIFF_SSTL135 [get_ports ddram_clk_p]
## ddram:0.clk_n
set_property LOC V9 [get_ports ddram_clk_n]
set_property SLEW FAST [get_ports ddram_clk_n]
set_property IOSTANDARD DIFF_SSTL135 [get_ports ddram_clk_n]
## ddram:0.cke
set_property LOC N5 [get_ports ddram_cke]
set_property SLEW FAST [get_ports ddram_cke]
set_property IOSTANDARD SSTL135 [get_ports ddram_cke]
## ddram:0.odt
set_property LOC R5 [get_ports ddram_odt]
set_property SLEW FAST [get_ports ddram_odt]
set_property IOSTANDARD SSTL135 [get_ports ddram_odt]
## ddram:0.reset_n
set_property LOC K6 [get_ports ddram_reset_n]
set_property SLEW FAST [get_ports ddram_reset_n]
set_property IOSTANDARD SSTL135 [get_ports ddram_reset_n]
################################################################################

# ddram:0.a
set_property LOC R2 [get_ports {ddram_a[0]}]
set_property SLEW FAST [get_ports {ddram_a[0]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[0]}]

# ddram:0.a
set_property LOC M6 [get_ports {ddram_a[1]}]
set_property SLEW FAST [get_ports {ddram_a[1]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[1]}]

# ddram:0.a
set_property LOC N4 [get_ports {ddram_a[2]}]
set_property SLEW FAST [get_ports {ddram_a[2]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[2]}]

# ddram:0.a
set_property LOC T1 [get_ports {ddram_a[3]}]
set_property SLEW FAST [get_ports {ddram_a[3]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[3]}]

# ddram:0.a
set_property LOC N6 [get_ports {ddram_a[4]}]
set_property SLEW FAST [get_ports {ddram_a[4]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[4]}]

# ddram:0.a
set_property LOC R7 [get_ports {ddram_a[5]}]
set_property SLEW FAST [get_ports {ddram_a[5]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[5]}]

# ddram:0.a
set_property LOC V6 [get_ports {ddram_a[6]}]
set_property SLEW FAST [get_ports {ddram_a[6]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[6]}]

# ddram:0.a
set_property LOC U7 [get_ports {ddram_a[7]}]
set_property SLEW FAST [get_ports {ddram_a[7]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[7]}]

# ddram:0.a
set_property LOC R8 [get_ports {ddram_a[8]}]
set_property SLEW FAST [get_ports {ddram_a[8]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[8]}]

# ddram:0.a
set_property LOC V7 [get_ports {ddram_a[9]}]
set_property SLEW FAST [get_ports {ddram_a[9]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[9]}]

# ddram:0.a
set_property LOC R6 [get_ports {ddram_a[10]}]
set_property SLEW FAST [get_ports {ddram_a[10]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[10]}]

# ddram:0.a
set_property LOC U6 [get_ports {ddram_a[11]}]
set_property SLEW FAST [get_ports {ddram_a[11]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[11]}]

# ddram:0.a
set_property LOC T6 [get_ports {ddram_a[12]}]
set_property SLEW FAST [get_ports {ddram_a[12]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[12]}]

# ddram:0.a
set_property LOC T8 [get_ports {ddram_a[13]}]
set_property SLEW FAST [get_ports {ddram_a[13]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_a[13]}]

# ddram:0.ba
set_property LOC R1 [get_ports {ddram_ba[0]}]
set_property SLEW FAST [get_ports {ddram_ba[0]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_ba[0]}]

# ddram:0.ba
set_property LOC P4 [get_ports {ddram_ba[1]}]
set_property SLEW FAST [get_ports {ddram_ba[1]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_ba[1]}]

# ddram:0.ba
set_property LOC P2 [get_ports {ddram_ba[2]}]
set_property SLEW FAST [get_ports {ddram_ba[2]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_ba[2]}]

# ddram:0.ras_n
set_property LOC P3 [get_ports {ddram_ras_n}]
set_property SLEW FAST [get_ports {ddram_ras_n}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_ras_n}]

# ddram:0.cas_n
set_property LOC M4 [get_ports {ddram_cas_n}]
set_property SLEW FAST [get_ports {ddram_cas_n}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_cas_n}]

# ddram:0.we_n
set_property LOC P5 [get_ports {ddram_we_n}]
set_property SLEW FAST [get_ports {ddram_we_n}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_we_n}]

# ddram:0.cs_n
set_property LOC U8 [get_ports {ddram_cs_n}]
set_property SLEW FAST [get_ports {ddram_cs_n}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_cs_n}]

# ddram:0.dm
set_property LOC L1 [get_ports {ddram_dm[0]}]
set_property SLEW FAST [get_ports {ddram_dm[0]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dm[0]}]

# ddram:0.dm
set_property LOC U1 [get_ports {ddram_dm[1]}]
set_property SLEW FAST [get_ports {ddram_dm[1]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dm[1]}]

# ddram:0.dq
set_property LOC K5 [get_ports {ddram_dq[0]}]
set_property SLEW FAST [get_ports {ddram_dq[0]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[0]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[0]}]

# ddram:0.dq
set_property LOC L3 [get_ports {ddram_dq[1]}]
set_property SLEW FAST [get_ports {ddram_dq[1]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[1]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[1]}]

# ddram:0.dq
set_property LOC K3 [get_ports {ddram_dq[2]}]
set_property SLEW FAST [get_ports {ddram_dq[2]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[2]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[2]}]

# ddram:0.dq
set_property LOC L6 [get_ports {ddram_dq[3]}]
set_property SLEW FAST [get_ports {ddram_dq[3]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[3]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[3]}]

# ddram:0.dq
set_property LOC M3 [get_ports {ddram_dq[4]}]
set_property SLEW FAST [get_ports {ddram_dq[4]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[4]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[4]}]

# ddram:0.dq
set_property LOC M1 [get_ports {ddram_dq[5]}]
set_property SLEW FAST [get_ports {ddram_dq[5]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[5]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[5]}]

# ddram:0.dq
set_property LOC L4 [get_ports {ddram_dq[6]}]
set_property SLEW FAST [get_ports {ddram_dq[6]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[6]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[6]}]

# ddram:0.dq
set_property LOC M2 [get_ports {ddram_dq[7]}]
set_property SLEW FAST [get_ports {ddram_dq[7]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[7]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[7]}]

# ddram:0.dq
set_property LOC V4 [get_ports {ddram_dq[8]}]
set_property SLEW FAST [get_ports {ddram_dq[8]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[8]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[8]}]

# ddram:0.dq
set_property LOC T5 [get_ports {ddram_dq[9]}]
set_property SLEW FAST [get_ports {ddram_dq[9]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[9]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[9]}]

# ddram:0.dq
set_property LOC U4 [get_ports {ddram_dq[10]}]
set_property SLEW FAST [get_ports {ddram_dq[10]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[10]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[10]}]

# ddram:0.dq
set_property LOC V5 [get_ports {ddram_dq[11]}]
set_property SLEW FAST [get_ports {ddram_dq[11]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[11]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[11]}]

# ddram:0.dq
set_property LOC V1 [get_ports {ddram_dq[12]}]
set_property SLEW FAST [get_ports {ddram_dq[12]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[12]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[12]}]

# ddram:0.dq
set_property LOC T3 [get_ports {ddram_dq[13]}]
set_property SLEW FAST [get_ports {ddram_dq[13]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[13]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[13]}]

# ddram:0.dq
set_property LOC U3 [get_ports {ddram_dq[14]}]
set_property SLEW FAST [get_ports {ddram_dq[14]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[14]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[14]}]

# ddram:0.dq
set_property LOC R3 [get_ports {ddram_dq[15]}]
set_property SLEW FAST [get_ports {ddram_dq[15]}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_dq[15]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dq[15]}]

# ddram:0.dqs_p
set_property LOC N2 [get_ports {ddram_dqs_p[0]}]
set_property SLEW FAST [get_ports {ddram_dqs_p[0]}]
set_property IOSTANDARD DIFF_SSTL135 [get_ports {ddram_dqs_p[0]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dqs_p[0]}]

# ddram:0.dqs_p
set_property LOC U2 [get_ports {ddram_dqs_p[1]}]
set_property SLEW FAST [get_ports {ddram_dqs_p[1]}]
set_property IOSTANDARD DIFF_SSTL135 [get_ports {ddram_dqs_p[1]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dqs_p[1]}]

# ddram:0.dqs_n
set_property LOC N1 [get_ports {ddram_dqs_n[0]}]
set_property SLEW FAST [get_ports {ddram_dqs_n[0]}]
set_property IOSTANDARD DIFF_SSTL135 [get_ports {ddram_dqs_n[0]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dqs_n[0]}]

# ddram:0.dqs_n
set_property LOC V2 [get_ports {ddram_dqs_n[1]}]
set_property SLEW FAST [get_ports {ddram_dqs_n[1]}]
set_property IOSTANDARD DIFF_SSTL135 [get_ports {ddram_dqs_n[1]}]
set_property IN_TERM UNTUNED_SPLIT_40 [get_ports {ddram_dqs_n[1]}]

# ddram:0.clk_p
set_property LOC U9 [get_ports {ddram_clk_p}]
set_property SLEW FAST [get_ports {ddram_clk_p}]
set_property IOSTANDARD DIFF_SSTL135 [get_ports {ddram_clk_p}]

# ddram:0.clk_n
set_property LOC V9 [get_ports {ddram_clk_n}]
set_property SLEW FAST [get_ports {ddram_clk_n}]
set_property IOSTANDARD DIFF_SSTL135 [get_ports {ddram_clk_n}]

# ddram:0.cke
set_property LOC N5 [get_ports {ddram_cke}]
set_property SLEW FAST [get_ports {ddram_cke}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_cke}]

# ddram:0.odt
set_property LOC R5 [get_ports {ddram_odt}]
set_property SLEW FAST [get_ports {ddram_odt}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_odt}]

# ddram:0.reset_n
set_property LOC K6 [get_ports {ddram_reset_n}]
set_property SLEW FAST [get_ports {ddram_reset_n}]
set_property IOSTANDARD SSTL135 [get_ports {ddram_reset_n}]

################################################################################
# Design constraints and bitsteam attributes
################################################################################

#Internal VREF
set_property INTERNAL_VREF 0.675 [get_iobanks 34]
@ -237,3 +303,17 @@ set_property CFGBVS VCCO [current_design]
set_property BITSTREAM.GENERAL.COMPRESS TRUE [current_design]
set_property BITSTREAM.CONFIG.CONFIGRATE 33 [current_design]
set_property CONFIG_MODE SPIx4 [current_design]

################################################################################
# Clock constraints
################################################################################

create_clock -add -name sys_clk_pin -period 10.00 -waveform {0 5} [get_ports { ext_clk }];

################################################################################
# False path constraints (from LiteX as they relate to LiteDRAM)
################################################################################

set_false_path -quiet -to [get_pins -filter {REF_PIN_NAME == PRE} -of_objects [get_cells -hierarchical -filter {ars_ff1 == TRUE || ars_ff2 == TRUE}]]

set_max_delay 2 -quiet -from [get_pins -filter {REF_PIN_NAME == C} -of_objects [get_cells -hierarchical -filter {ars_ff1 == TRUE}]] -to [get_pins -filter {REF_PIN_NAME == D} -of_objects [get_cells -hierarchical -filter {ars_ff2 == TRUE}]]

506
fpga/nexys-video.xdc
Unescape Escape View File

@ -1,231 +1,293 @@
################################################################################
# clkin, reset, uart pins...
################################################################################

set_property -dict {PACKAGE_PIN R4 IOSTANDARD LVCMOS33} [get_ports ext_clk]
create_clock -period 10.000 -name sys_clk_pin -waveform {0.000 5.000} -add [get_ports ext_clk]

set_property -dict {PACKAGE_PIN G4 IOSTANDARD LVCMOS15} [get_ports ext_rst]

set_property -dict {PACKAGE_PIN AA19 IOSTANDARD LVCMOS33} [get_ports uart_main_tx]
set_property -dict {PACKAGE_PIN V18 IOSTANDARD LVCMOS33} [get_ports uart_main_rx]

##Pmod Header JA: UART (bottom)
################################################################################
# Pmod Header JC: UART (bottom)
################################################################################

#set_property -dict { PACKAGE_PIN Y21 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_cts_n }];
#set_property -dict { PACKAGE_PIN AA21 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_tx }];
#set_property -dict { PACKAGE_PIN AA20 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_rx }];
#set_property -dict { PACKAGE_PIN AA18 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_rts_n }];

set_property -dict { PACKAGE_PIN Y21 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_cts_n }];
set_property -dict { PACKAGE_PIN AA21 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_tx }];
set_property -dict { PACKAGE_PIN AA20 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_rx }];
set_property -dict { PACKAGE_PIN AA18 IOSTANDARD LVCMOS33 } [get_ports { uart_pmod_rts_n }];
################################################################################
# LEDs
################################################################################

# LEDs (no colors, just normal LEDs here)
set_property -dict { PACKAGE_PIN T14 IOSTANDARD LVCMOS33 } [get_ports { led0 }];
set_property -dict { PACKAGE_PIN T15 IOSTANDARD LVCMOS33 } [get_ports { led1 }];

################################################################################
# DRAM (generated by LiteX)
## ddram:0.a
set_property LOC M2 [get_ports ddram_a[0]]
set_property SLEW FAST [get_ports ddram_a[0]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[0]]
## ddram:0.a
set_property LOC M5 [get_ports ddram_a[1]]
set_property SLEW FAST [get_ports ddram_a[1]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[1]]
## ddram:0.a
set_property LOC M3 [get_ports ddram_a[2]]
set_property SLEW FAST [get_ports ddram_a[2]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[2]]
## ddram:0.a
set_property LOC M1 [get_ports ddram_a[3]]
set_property SLEW FAST [get_ports ddram_a[3]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[3]]
## ddram:0.a
set_property LOC L6 [get_ports ddram_a[4]]
set_property SLEW FAST [get_ports ddram_a[4]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[4]]
## ddram:0.a
set_property LOC P1 [get_ports ddram_a[5]]
set_property SLEW FAST [get_ports ddram_a[5]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[5]]
## ddram:0.a
set_property LOC N3 [get_ports ddram_a[6]]
set_property SLEW FAST [get_ports ddram_a[6]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[6]]
## ddram:0.a
set_property LOC N2 [get_ports ddram_a[7]]
set_property SLEW FAST [get_ports ddram_a[7]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[7]]
## ddram:0.a
set_property LOC M6 [get_ports ddram_a[8]]
set_property SLEW FAST [get_ports ddram_a[8]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[8]]
## ddram:0.a
set_property LOC R1 [get_ports ddram_a[9]]
set_property SLEW FAST [get_ports ddram_a[9]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[9]]
## ddram:0.a
set_property LOC L5 [get_ports ddram_a[10]]
set_property SLEW FAST [get_ports ddram_a[10]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[10]]
## ddram:0.a
set_property LOC N5 [get_ports ddram_a[11]]
set_property SLEW FAST [get_ports ddram_a[11]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[11]]
## ddram:0.a
set_property LOC N4 [get_ports ddram_a[12]]
set_property SLEW FAST [get_ports ddram_a[12]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[12]]
## ddram:0.a
set_property LOC P2 [get_ports ddram_a[13]]
set_property SLEW FAST [get_ports ddram_a[13]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[13]]
## ddram:0.a
set_property LOC P6 [get_ports ddram_a[14]]
set_property SLEW FAST [get_ports ddram_a[14]]
set_property IOSTANDARD SSTL15 [get_ports ddram_a[14]]
## ddram:0.ba
set_property LOC L3 [get_ports ddram_ba[0]]
set_property SLEW FAST [get_ports ddram_ba[0]]
set_property IOSTANDARD SSTL15 [get_ports ddram_ba[0]]
## ddram:0.ba
set_property LOC K6 [get_ports ddram_ba[1]]
set_property SLEW FAST [get_ports ddram_ba[1]]
set_property IOSTANDARD SSTL15 [get_ports ddram_ba[1]]
## ddram:0.ba
set_property LOC L4 [get_ports ddram_ba[2]]
set_property SLEW FAST [get_ports ddram_ba[2]]
set_property IOSTANDARD SSTL15 [get_ports ddram_ba[2]]
## ddram:0.ras_n
set_property LOC J4 [get_ports ddram_ras_n]
set_property SLEW FAST [get_ports ddram_ras_n]
set_property IOSTANDARD SSTL15 [get_ports ddram_ras_n]
## ddram:0.cas_n
set_property LOC K3 [get_ports ddram_cas_n]
set_property SLEW FAST [get_ports ddram_cas_n]
set_property IOSTANDARD SSTL15 [get_ports ddram_cas_n]
## ddram:0.we_n
set_property LOC L1 [get_ports ddram_we_n]
set_property SLEW FAST [get_ports ddram_we_n]
set_property IOSTANDARD SSTL15 [get_ports ddram_we_n]
## ddram:0.dm
set_property LOC G3 [get_ports ddram_dm[0]]
set_property SLEW FAST [get_ports ddram_dm[0]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dm[0]]
## ddram:0.dm
set_property LOC F1 [get_ports ddram_dm[1]]
set_property SLEW FAST [get_ports ddram_dm[1]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dm[1]]
## ddram:0.dq
set_property LOC G2 [get_ports ddram_dq[0]]
set_property SLEW FAST [get_ports ddram_dq[0]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[0]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[0]]
## ddram:0.dq
set_property LOC H4 [get_ports ddram_dq[1]]
set_property SLEW FAST [get_ports ddram_dq[1]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[1]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[1]]
## ddram:0.dq
set_property LOC H5 [get_ports ddram_dq[2]]
set_property SLEW FAST [get_ports ddram_dq[2]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[2]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[2]]
## ddram:0.dq
set_property LOC J1 [get_ports ddram_dq[3]]
set_property SLEW FAST [get_ports ddram_dq[3]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[3]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[3]]
## ddram:0.dq
set_property LOC K1 [get_ports ddram_dq[4]]
set_property SLEW FAST [get_ports ddram_dq[4]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[4]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[4]]
## ddram:0.dq
set_property LOC H3 [get_ports ddram_dq[5]]
set_property SLEW FAST [get_ports ddram_dq[5]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[5]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[5]]
## ddram:0.dq
set_property LOC H2 [get_ports ddram_dq[6]]
set_property SLEW FAST [get_ports ddram_dq[6]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[6]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[6]]
## ddram:0.dq
set_property LOC J5 [get_ports ddram_dq[7]]
set_property SLEW FAST [get_ports ddram_dq[7]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[7]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[7]]
## ddram:0.dq
set_property LOC E3 [get_ports ddram_dq[8]]
set_property SLEW FAST [get_ports ddram_dq[8]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[8]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[8]]
## ddram:0.dq
set_property LOC B2 [get_ports ddram_dq[9]]
set_property SLEW FAST [get_ports ddram_dq[9]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[9]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[9]]
## ddram:0.dq
set_property LOC F3 [get_ports ddram_dq[10]]
set_property SLEW FAST [get_ports ddram_dq[10]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[10]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[10]]
## ddram:0.dq
set_property LOC D2 [get_ports ddram_dq[11]]
set_property SLEW FAST [get_ports ddram_dq[11]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[11]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[11]]
## ddram:0.dq
set_property LOC C2 [get_ports ddram_dq[12]]
set_property SLEW FAST [get_ports ddram_dq[12]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[12]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[12]]
## ddram:0.dq
set_property LOC A1 [get_ports ddram_dq[13]]
set_property SLEW FAST [get_ports ddram_dq[13]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[13]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[13]]
## ddram:0.dq
set_property LOC E2 [get_ports ddram_dq[14]]
set_property SLEW FAST [get_ports ddram_dq[14]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[14]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[14]]
## ddram:0.dq
set_property LOC B1 [get_ports ddram_dq[15]]
set_property SLEW FAST [get_ports ddram_dq[15]]
set_property IOSTANDARD SSTL15 [get_ports ddram_dq[15]]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports ddram_dq[15]]
## ddram:0.dqs_p
set_property LOC K2 [get_ports ddram_dqs_p[0]]
set_property SLEW FAST [get_ports ddram_dqs_p[0]]
set_property IOSTANDARD DIFF_SSTL15 [get_ports ddram_dqs_p[0]]
## ddram:0.dqs_p
set_property LOC E1 [get_ports ddram_dqs_p[1]]
set_property SLEW FAST [get_ports ddram_dqs_p[1]]
set_property IOSTANDARD DIFF_SSTL15 [get_ports ddram_dqs_p[1]]
## ddram:0.dqs_n
set_property LOC J2 [get_ports ddram_dqs_n[0]]
set_property SLEW FAST [get_ports ddram_dqs_n[0]]
set_property IOSTANDARD DIFF_SSTL15 [get_ports ddram_dqs_n[0]]
## ddram:0.dqs_n
set_property LOC D1 [get_ports ddram_dqs_n[1]]
set_property SLEW FAST [get_ports ddram_dqs_n[1]]
set_property IOSTANDARD DIFF_SSTL15 [get_ports ddram_dqs_n[1]]
## ddram:0.clk_p
set_property LOC P5 [get_ports ddram_clk_p]
set_property SLEW FAST [get_ports ddram_clk_p]
set_property IOSTANDARD DIFF_SSTL15 [get_ports ddram_clk_p]
## ddram:0.clk_n
set_property LOC P4 [get_ports ddram_clk_n]
set_property SLEW FAST [get_ports ddram_clk_n]
set_property IOSTANDARD DIFF_SSTL15 [get_ports ddram_clk_n]
## ddram:0.cke
set_property LOC J6 [get_ports ddram_cke]
set_property SLEW FAST [get_ports ddram_cke]
set_property IOSTANDARD SSTL15 [get_ports ddram_cke]
## ddram:0.odt
set_property LOC K4 [get_ports ddram_odt]
set_property SLEW FAST [get_ports ddram_odt]
set_property IOSTANDARD SSTL15 [get_ports ddram_odt]
## ddram:0.reset_n
set_property LOC G1 [get_ports ddram_reset_n]
set_property SLEW FAST [get_ports ddram_reset_n]
set_property IOSTANDARD SSTL15 [get_ports ddram_reset_n]
################################################################################

# ddram:0.a
set_property LOC M2 [get_ports {ddram_a[0]}]
set_property SLEW FAST [get_ports {ddram_a[0]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[0]}]

# ddram:0.a
set_property LOC M5 [get_ports {ddram_a[1]}]
set_property SLEW FAST [get_ports {ddram_a[1]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[1]}]

# ddram:0.a
set_property LOC M3 [get_ports {ddram_a[2]}]
set_property SLEW FAST [get_ports {ddram_a[2]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[2]}]

# ddram:0.a
set_property LOC M1 [get_ports {ddram_a[3]}]
set_property SLEW FAST [get_ports {ddram_a[3]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[3]}]

# ddram:0.a
set_property LOC L6 [get_ports {ddram_a[4]}]
set_property SLEW FAST [get_ports {ddram_a[4]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[4]}]

# ddram:0.a
set_property LOC P1 [get_ports {ddram_a[5]}]
set_property SLEW FAST [get_ports {ddram_a[5]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[5]}]

# ddram:0.a
set_property LOC N3 [get_ports {ddram_a[6]}]
set_property SLEW FAST [get_ports {ddram_a[6]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[6]}]

# ddram:0.a
set_property LOC N2 [get_ports {ddram_a[7]}]
set_property SLEW FAST [get_ports {ddram_a[7]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[7]}]

# ddram:0.a
set_property LOC M6 [get_ports {ddram_a[8]}]
set_property SLEW FAST [get_ports {ddram_a[8]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[8]}]

# ddram:0.a
set_property LOC R1 [get_ports {ddram_a[9]}]
set_property SLEW FAST [get_ports {ddram_a[9]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[9]}]

# ddram:0.a
set_property LOC L5 [get_ports {ddram_a[10]}]
set_property SLEW FAST [get_ports {ddram_a[10]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[10]}]

# ddram:0.a
set_property LOC N5 [get_ports {ddram_a[11]}]
set_property SLEW FAST [get_ports {ddram_a[11]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[11]}]

# ddram:0.a
set_property LOC N4 [get_ports {ddram_a[12]}]
set_property SLEW FAST [get_ports {ddram_a[12]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[12]}]

# ddram:0.a
set_property LOC P2 [get_ports {ddram_a[13]}]
set_property SLEW FAST [get_ports {ddram_a[13]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[13]}]

# ddram:0.a
set_property LOC P6 [get_ports {ddram_a[14]}]
set_property SLEW FAST [get_ports {ddram_a[14]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_a[14]}]

# ddram:0.ba
set_property LOC L3 [get_ports {ddram_ba[0]}]
set_property SLEW FAST [get_ports {ddram_ba[0]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_ba[0]}]

# ddram:0.ba
set_property LOC K6 [get_ports {ddram_ba[1]}]
set_property SLEW FAST [get_ports {ddram_ba[1]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_ba[1]}]

# ddram:0.ba
set_property LOC L4 [get_ports {ddram_ba[2]}]
set_property SLEW FAST [get_ports {ddram_ba[2]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_ba[2]}]

# ddram:0.ras_n
set_property LOC J4 [get_ports {ddram_ras_n}]
set_property SLEW FAST [get_ports {ddram_ras_n}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_ras_n}]

# ddram:0.cas_n
set_property LOC K3 [get_ports {ddram_cas_n}]
set_property SLEW FAST [get_ports {ddram_cas_n}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_cas_n}]

# ddram:0.we_n
set_property LOC L1 [get_ports {ddram_we_n}]
set_property SLEW FAST [get_ports {ddram_we_n}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_we_n}]

# ddram:0.dm
set_property LOC G3 [get_ports {ddram_dm[0]}]
set_property SLEW FAST [get_ports {ddram_dm[0]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dm[0]}]

# ddram:0.dm
set_property LOC F1 [get_ports {ddram_dm[1]}]
set_property SLEW FAST [get_ports {ddram_dm[1]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dm[1]}]

# ddram:0.dq
set_property LOC G2 [get_ports {ddram_dq[0]}]
set_property SLEW FAST [get_ports {ddram_dq[0]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[0]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[0]}]

# ddram:0.dq
set_property LOC H4 [get_ports {ddram_dq[1]}]
set_property SLEW FAST [get_ports {ddram_dq[1]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[1]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[1]}]

# ddram:0.dq
set_property LOC H5 [get_ports {ddram_dq[2]}]
set_property SLEW FAST [get_ports {ddram_dq[2]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[2]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[2]}]

# ddram:0.dq
set_property LOC J1 [get_ports {ddram_dq[3]}]
set_property SLEW FAST [get_ports {ddram_dq[3]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[3]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[3]}]

# ddram:0.dq
set_property LOC K1 [get_ports {ddram_dq[4]}]
set_property SLEW FAST [get_ports {ddram_dq[4]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[4]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[4]}]

# ddram:0.dq
set_property LOC H3 [get_ports {ddram_dq[5]}]
set_property SLEW FAST [get_ports {ddram_dq[5]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[5]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[5]}]

# ddram:0.dq
set_property LOC H2 [get_ports {ddram_dq[6]}]
set_property SLEW FAST [get_ports {ddram_dq[6]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[6]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[6]}]

# ddram:0.dq
set_property LOC J5 [get_ports {ddram_dq[7]}]
set_property SLEW FAST [get_ports {ddram_dq[7]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[7]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[7]}]

# ddram:0.dq
set_property LOC E3 [get_ports {ddram_dq[8]}]
set_property SLEW FAST [get_ports {ddram_dq[8]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[8]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[8]}]

# ddram:0.dq
set_property LOC B2 [get_ports {ddram_dq[9]}]
set_property SLEW FAST [get_ports {ddram_dq[9]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[9]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[9]}]

# ddram:0.dq
set_property LOC F3 [get_ports {ddram_dq[10]}]
set_property SLEW FAST [get_ports {ddram_dq[10]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[10]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[10]}]

# ddram:0.dq
set_property LOC D2 [get_ports {ddram_dq[11]}]
set_property SLEW FAST [get_ports {ddram_dq[11]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[11]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[11]}]

# ddram:0.dq
set_property LOC C2 [get_ports {ddram_dq[12]}]
set_property SLEW FAST [get_ports {ddram_dq[12]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[12]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[12]}]

# ddram:0.dq
set_property LOC A1 [get_ports {ddram_dq[13]}]
set_property SLEW FAST [get_ports {ddram_dq[13]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[13]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[13]}]

# ddram:0.dq
set_property LOC E2 [get_ports {ddram_dq[14]}]
set_property SLEW FAST [get_ports {ddram_dq[14]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[14]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[14]}]

# ddram:0.dq
set_property LOC B1 [get_ports {ddram_dq[15]}]
set_property SLEW FAST [get_ports {ddram_dq[15]}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_dq[15]}]
set_property IN_TERM UNTUNED_SPLIT_50 [get_ports {ddram_dq[15]}]

# ddram:0.dqs_p
set_property LOC K2 [get_ports {ddram_dqs_p[0]}]
set_property SLEW FAST [get_ports {ddram_dqs_p[0]}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_dqs_p[0]}]

# ddram:0.dqs_p
set_property LOC E1 [get_ports {ddram_dqs_p[1]}]
set_property SLEW FAST [get_ports {ddram_dqs_p[1]}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_dqs_p[1]}]

# ddram:0.dqs_n
set_property LOC J2 [get_ports {ddram_dqs_n[0]}]
set_property SLEW FAST [get_ports {ddram_dqs_n[0]}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_dqs_n[0]}]

# ddram:0.dqs_n
set_property LOC D1 [get_ports {ddram_dqs_n[1]}]
set_property SLEW FAST [get_ports {ddram_dqs_n[1]}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_dqs_n[1]}]

# ddram:0.clk_p
set_property LOC P5 [get_ports {ddram_clk_p}]
set_property SLEW FAST [get_ports {ddram_clk_p}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_clk_p}]

# ddram:0.clk_n
set_property LOC P4 [get_ports {ddram_clk_n}]
set_property SLEW FAST [get_ports {ddram_clk_n}]
set_property IOSTANDARD DIFF_SSTL15 [get_ports {ddram_clk_n}]

# ddram:0.cke
set_property LOC J6 [get_ports {ddram_cke}]
set_property SLEW FAST [get_ports {ddram_cke}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_cke}]

# ddram:0.odt
set_property LOC K4 [get_ports {ddram_odt}]
set_property SLEW FAST [get_ports {ddram_odt}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_odt}]

# ddram:0.reset_n
set_property LOC G1 [get_ports {ddram_reset_n}]
set_property SLEW FAST [get_ports {ddram_reset_n}]
set_property IOSTANDARD SSTL15 [get_ports {ddram_reset_n}]

################################################################################
# Design constraints and bitsteam attributes
################################################################################

#Internal VREF
set_property INTERNAL_VREF 0.750 [get_iobanks 35]
@ -236,3 +298,17 @@ set_property CFGBVS VCCO [current_design]
set_property BITSTREAM.GENERAL.COMPRESS TRUE [current_design]
set_property BITSTREAM.CONFIG.CONFIGRATE 33 [current_design]
set_property CONFIG_MODE SPIx4 [current_design]

################################################################################
# Clock constraints
################################################################################

create_clock -add -name sys_clk_pin -period 10.00 -waveform {0 5} [get_ports { ext_clk }];

################################################################################
# False path constraints (from LiteX as they relate to LiteDRAM)
################################################################################

set_false_path -quiet -to [get_pins -filter {REF_PIN_NAME == PRE} -of_objects [get_cells -hierarchical -filter {ars_ff1 == TRUE || ars_ff2 == TRUE}]]

set_max_delay 2 -quiet -from [get_pins -filter {REF_PIN_NAME == C} -of_objects [get_cells -hierarchical -filter {ars_ff1 == TRUE}]] -to [get_pins -filter {REF_PIN_NAME == D} -of_objects [get_cells -hierarchical -filter {ars_ff2 == TRUE}]]

143
litedram/extras/litedram-wrapper-l2.vhdl
Unescape Escape View File

@ -235,20 +235,27 @@ architecture behaviour of litedram_wrapper is

-- Cache state machine
type state_t is (IDLE, -- Normal load hit processing
REFILL_CLR_TAG, -- Cache refill clear tag
REFILL_WAIT_ACK); -- Cache refill wait ack
signal state : state_t;

-- Latched WB request.
signal wb_req : wishbone_master_out := wishbone_master_out_init;
-- Latched WB request
signal wb_req : wishbone_master_out := wishbone_master_out_init;
-- Stashed WB request
signal wb_stash : wishbone_master_out := wishbone_master_out_init;

-- Read pipeline (to handle cache RAM latency)
signal read_ack_0 : std_ulogic;
signal read_ack_1 : std_ulogic;
signal read_ack_0 : std_ulogic := '0';
signal read_ack_1 : std_ulogic := '0';
signal read_ad3_0 : std_ulogic;
signal read_ad3_1 : std_ulogic;
signal read_way_0 : way_t;
signal read_way_1 : way_t;

-- Store ack pipeline
signal store_ack_0 : std_ulogic := '0';
signal store_ack_1 : std_ulogic := '0';

-- Async signals decoding latched request
type req_op_t is (OP_NONE,
OP_LOAD_HIT,
@ -266,6 +273,7 @@ architecture behaviour of litedram_wrapper is
signal req_we : std_ulogic_vector(DRAM_SBITS-1 downto 0);
signal req_wdata : std_ulogic_vector(DRAM_DBITS-1 downto 0);
signal accept_store : std_ulogic;
signal stall : std_ulogic;

-- Line refill command signals and latches
signal refill_cmd_valid : std_ulogic;
@ -573,31 +581,54 @@ begin
request_latch: process(system_clk)
begin
if rising_edge(system_clk) then
-- We can latch a new request if we are idle (for now). We also
-- latch the absence of request. This is a pipeline that takes
-- one per-cycle unless non-IDLE.
--
if wb_out.stall = '0' then
-- Avoid constantly updating addr/data for unrelated requests
if wb_in.cyc = '1' then
wb_req <= wb_in;

-- Implement a stash buffer. If we are stalled and stash is
-- free, fill it up. This will generate a WB stall on the
-- next cycle.
if stall = '1' and wb_out.stall = '0' and wb_in.cyc = '1' and wb_in.stb = '1' then
wb_stash <= wb_in;
if TRACE then
report "stashed wb req ! addr:" & to_hstring(wb_in.adr) &
" we:" & std_ulogic'image(wb_in.we) &
" sel:" & to_hstring(wb_in.sel);
end if;
end if;

-- We aren't stalled, see what we can do
if stall = '0' then
if wb_stash.cyc = '1' then
-- Something in stash ! use it and clear stash
wb_req <= wb_stash;
wb_stash.cyc <= '0';
if TRACE then
report "unstashed wb req ! addr:" & to_hstring(wb_stash.adr) &
" we:" & std_ulogic'image(wb_stash.we) &
" sel:" & to_hstring(wb_stash.sel);
end if;
else
wb_req.cyc <= wb_in.cyc;
wb_req.stb <= wb_in.stb;
end if;
-- Grab request from WB
if wb_in.cyc = '1' then
wb_req <= wb_in;
else
wb_req.cyc <= wb_in.cyc;
wb_req.stb <= wb_in.stb;
end if;

if TRACE then
if wb_in.cyc = '1' and wb_in.stb = '1' then
report "latch new wb req ! addr:" & to_hstring(wb_in.adr) &
" we:" & std_ulogic'image(wb_in.we) &
" sel:" & to_hstring(wb_in.sel);
if TRACE then
if wb_in.cyc = '1' and wb_in.stb = '1' then
report "latch new wb req ! addr:" & to_hstring(wb_in.adr) &
" we:" & std_ulogic'image(wb_in.we) &
" sel:" & to_hstring(wb_in.sel);
end if;
end if;
end if;
end if;
end if;
end process;

--
-- Stall when stash is full
wb_out.stall <= wb_stash.cyc;

--
-- Read response pipeline
--
@ -629,6 +660,16 @@ begin
end if;
end process;

--
-- Store acks pipeline
--
store_ack_pipe: process(system_clk)
begin
if rising_edge(system_clk) then
store_ack_1 <= store_ack_0;
end if;
end process;

wb_reponse: process(all)
variable rdata : std_ulogic_vector(DRAM_DBITS-1 downto 0);
variable store_done : std_ulogic;
@ -668,14 +709,14 @@ begin
when IDLE =>
case req_op is
when OP_LOAD_MISS =>
wb_out.stall <= '1';
stall <= '1';
when OP_STORE_MISS | OP_STORE_HIT =>
wb_out.stall <= not accept_store;
stall <= not accept_store;
when others =>
wb_out.stall <= '0';
stall <= '0';
end case;
when REFILL_WAIT_ACK =>
wb_out.stall <= '1';
when others =>
stall <= '1';
end case;
-- Data out mux
@ -689,15 +730,16 @@ begin
store_done := '0';
end if;

-- Generate ACKs on read hits and store complete
-- Pipeline store acks
store_ack_0 <= store_done;

-- Generate Wishbone ACKs on read hits and store complete
--
-- XXXX TODO: This can happen on store right behind loads !
-- This probably need to be fixed by putting store acks in
-- the same pipeline as the read acks. TOOD: Create a testbench
-- to exercise those corner cases as the core can't yet.
-- This can happen on store right behind loads ! This is why
-- we don't accept a new store right behind a load ack above.
--
wb_out.ack <= read_ack_1 or store_done;
assert read_ack_0 = '0' or store_done = '0' report
wb_out.ack <= read_ack_1 or store_ack_1;
assert read_ack_1 = '0' or store_ack_1 = '0' report
"Read ack and store ack collision !"
severity failure;
end process;
@ -859,7 +901,6 @@ begin
refill_machine : process(system_clk)
variable tagset : cache_tags_set_t;
variable cmds_done : boolean;
variable replace_way : way_t;
variable wait_qdrain : boolean;
begin
if rising_edge(system_clk) then
@ -887,23 +928,10 @@ begin
-- We need to read a cache line
if req_op = OP_LOAD_MISS and not wait_qdrain then
-- Grab way to replace
replace_way := to_integer(unsigned(plru_victim(req_index)));

-- Force misses on that way while refilling that line
cache_valids(req_index)(replace_way) <= '0';

-- Store new tag in selected way
for i in 0 to NUM_WAYS-1 loop
if i = replace_way then
tagset := cache_tags(req_index);
write_tag(i, tagset, req_tag);
cache_tags(req_index) <= tagset;
end if;
end loop;
refill_way <= to_integer(unsigned(plru_victim(req_index)));

-- Keep track of our index and way for subsequent stores
refill_index <= req_index;
refill_way <= replace_way;
refill_row <= get_row(req_laddr);

-- Prep for first DRAM read
@ -921,10 +949,27 @@ begin
end if;

-- Track that we had one request sent
state <= REFILL_CLR_TAG;
end if;

when REFILL_CLR_TAG | REFILL_WAIT_ACK =>

-- Delayed tag clearing to help timing on PLRU output
if state = REFILL_CLR_TAG then
-- Force misses on that way while refilling that line
cache_valids(req_index)(refill_way) <= '0';

-- Store new tag in selected way
for i in 0 to NUM_WAYS-1 loop
if i = refill_way then
tagset := cache_tags(refill_index);
write_tag(i, tagset, req_tag);
cache_tags(refill_index) <= tagset;
end if;
end loop;
state <= REFILL_WAIT_ACK;
end if;

when REFILL_WAIT_ACK =>
-- Commands are all sent if user_port0_cmd_valid is 0
cmds_done := refill_cmd_valid = '0';


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