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Towards Xilinx bram support

This commit is contained in:
Clifford Wolf 2015-01-06 15:26:33 +01:00
parent 4a0b3a5423
commit 9474928672
5 changed files with 178 additions and 28 deletions
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1
passes/memory/memory_bram.cc
View File

@ -87,7 +87,6 @@ struct rules_t
tokens.clear();
string line;
while (std::getline(infile, line)) {
log("> %s\n", line.c_str());
for (string tok = next_token(line); !tok.empty(); tok = next_token(line)) {
if (tok[0] == '#')
break;

43
techlibs/xilinx/brams.txt
View File

@ -11,7 +11,7 @@ bram $__XILINX_RAMB36_SDP72
clkpol 2 3
endbram
bram $__XILINX_RAMB36_SDP36
bram $__XILINX_RAMB18_SDP36
abits 10
dbits 36
groups 2
@ -23,7 +23,7 @@ bram $__XILINX_RAMB36_SDP36
clkpol 2 3
endbram
bram $__XILINX_RAMB36_SDP18
bram $__XILINX_RAMB18_TDP18
abits 11
dbits 18
groups 2
@ -35,7 +35,7 @@ bram $__XILINX_RAMB36_SDP18
clkpol 2 3
endbram
bram $__XILINX_RAMB36_SDP9
bram $__XILINX_RAMB18_TDP9
abits 12
dbits 9
groups 2
@ -47,7 +47,7 @@ bram $__XILINX_RAMB36_SDP9
clkpol 2 3
endbram
bram $__XILINX_RAMB36_SDP4
bram $__XILINX_RAMB18_TDP4
abits 13
dbits 4
groups 2
@ -59,7 +59,7 @@ bram $__XILINX_RAMB36_SDP4
clkpol 2 3
endbram
bram $__XILINX_RAMB36_SDP2
bram $__XILINX_RAMB18_TDP2
abits 14
dbits 2
groups 2
@ -71,7 +71,7 @@ bram $__XILINX_RAMB36_SDP2
clkpol 2 3
endbram
bram $__XILINX_RAMB36_SDP1
bram $__XILINX_RAMB18_TDP1
abits 15
dbits 1
groups 2
@ -84,39 +84,36 @@ bram $__XILINX_RAMB36_SDP1
endbram
match $__XILINX_RAMB36_SDP72
min bits 4096
min efficiency 5
shuffle_enable 8
# min efficiency 20
or_next_if_better
endmatch
match $__XILINX_RAMB18_SDP36
min bits 4096
min efficiency 5
shuffle_enable 4
# or_next_if_better
endmatch
# match $__XILINX_RAMB36_SDP36
# shuffle_enable 4
# min efficiency 20
# or_next_if_better
# endmatch
#
# match $__XILINX_RAMB36_SDP18
# match $__XILINX_RAMB18_TDP18
# shuffle_enable 2
# min efficiency 20
# or_next_if_better
# endmatch
#
# match $__XILINX_RAMB36_SDP9
# min efficiency 20
# match $__XILINX_RAMB18_TDP9
# or_next_if_better
# endmatch
#
# match $__XILINX_RAMB36_SDP4
# min efficiency 20
# match $__XILINX_RAMB18_TDP4
# or_next_if_better
# endmatch
#
# match $__XILINX_RAMB36_SDP2
# min efficiency 20
# match $__XILINX_RAMB18_TDP2
# or_next_if_better
# endmatch
#
# match $__XILINX_RAMB36_SDP1
# min efficiency 20
# match $__XILINX_RAMB18_TDP1
# endmatch

152
techlibs/xilinx/brams.v
View File

@ -79,3 +79,155 @@ module \$__XILINX_RAMB36_SDP72 (CLK2, CLK3, A1ADDR, A1DATA, B1ADDR, B1DATA, B1EN
.WEBWE(B1EN)
);
endmodule
// ------------------------------------------------------------------------
module \$__XILINX_RAMB18_SDP36 (CLK2, CLK3, A1ADDR, A1DATA, B1ADDR, B1DATA, B1EN);
parameter TRANSP2 = 1;
parameter CLKPOL2 = 1;
parameter CLKPOL3 = 1;
input CLK2;
input CLK3;
input [8:0] A1ADDR;
output [35:0] A1DATA;
input [8:0] B1ADDR;
input [35:0] B1DATA;
input [3:0] B1EN;
wire [15:0] A1ADDR_16 = {A1ADDR, 5'b0};
wire [15:0] B1ADDR_16 = {B1ADDR, 5'b0};
wire [3:0] DIP, DOP;
wire [31:0] DI, DO;
wire [35:0] A1DATA_BUF;
reg [35:0] B1DATA_Q;
reg [3:0] transparent_cycle;
wire [1023:0] _TECHMAP_DO_ = "proc; opt -fast";
generate if (CLKPOL2)
always @(posedge CLK2) begin transparent_cycle <= TRANSP2 && A1ADDR == B1ADDR ? B1EN : 0; B1DATA_Q <= B1DATA; end
else
always @(negedge CLK2) begin transparent_cycle <= TRANSP2 && A1ADDR == B1ADDR ? B1EN : 0; B1DATA_Q <= B1DATA; end
endgenerate
assign A1DATA[ 8: 0] = transparent_cycle[0] ? B1DATA_Q[ 8: 0] : A1DATA_BUF[ 8: 0];
assign A1DATA[17: 9] = transparent_cycle[1] ? B1DATA_Q[17: 9] : A1DATA_BUF[17: 9];
assign A1DATA[26:18] = transparent_cycle[2] ? B1DATA_Q[26:18] : A1DATA_BUF[26:18];
assign A1DATA[35:27] = transparent_cycle[3] ? B1DATA_Q[35:27] : A1DATA_BUF[35:27];
assign A1DATA_BUF = { DOP[3], DO[31:24], DOP[2], DO[23:16], DOP[1], DO[15: 8], DOP[0], DO[ 7: 0] };
assign { DIP[3], DI[31:24], DIP[2], DI[23:16], DIP[1], DI[15: 8], DIP[0], DI[ 7: 0] } = B1DATA;
RAMB18E1 #(
.RAM_MODE("SDP"),
.READ_WIDTH_A(36),
.WRITE_WIDTH_B(36),
.WRITE_MODE_A(TRANSP2 ? "WRITE_FIRST" : "READ_FIRST"),
.WRITE_MODE_B(TRANSP2 ? "WRITE_FIRST" : "READ_FIRST")
) _TECHMAP_REPLACE_ (
.DOBDO(DO[31:16]),
.DOADO(DO[15:0]),
.DOPBDOP(DOP[3:2]),
.DOPADOP(DOP[1:0]),
.DIBDI(DI[31:16]),
.DIADI(DI[15:0]),
.DIPBDIP(DIP[3:2]),
.DIPADIP(DIP[1:0]),
.ADDRARDADDR(A1ADDR_16),
.CLKARDCLK(CLKPOL2 ? CLK2 : ~CLK2),
.ENARDEN(|1),
.REGCEAREGCE(|1),
.RSTRAMARSTRAM(|0),
.RSTREGARSTREG(|0),
.WEA(4'b0),
.ADDRBWRADDR(B1ADDR_16),
.CLKBWRCLK(CLKPOL3 ? CLK3 : ~CLK3),
.ENBWREN(|1),
.REGCEB(|0),
.RSTRAMB(|0),
.RSTREGB(|0),
.WEBWE(B1EN)
);
endmodule
// ------------------------------------------------------------------------
module \$__XILINX_RAMB18_TDP18 (CLK2, CLK3, A1ADDR, A1DATA, B1ADDR, B1DATA, B1EN);
parameter TRANSP2 = 1;
parameter CLKPOL2 = 1;
parameter CLKPOL3 = 1;
input CLK2;
input CLK3;
input [8:0] A1ADDR;
output [17:0] A1DATA;
input [8:0] B1ADDR;
input [17:0] B1DATA;
input [1:0] B1EN;
wire [13:0] A1ADDR_14 = {A1ADDR, 4'b0};
wire [13:0] B1ADDR_14 = {B1ADDR, 4'b0};
wire [1:0] DIP, DOP;
wire [15:0] DI, DO;
wire [17:0] A1DATA_BUF;
reg [17:0] B1DATA_Q;
reg [1:0] transparent_cycle;
wire [1023:0] _TECHMAP_DO_ = "proc; opt -fast";
generate if (CLKPOL2)
always @(posedge CLK2) begin transparent_cycle <= TRANSP2 && A1ADDR == B1ADDR ? B1EN : 0; B1DATA_Q <= B1DATA; end
else
always @(negedge CLK2) begin transparent_cycle <= TRANSP2 && A1ADDR == B1ADDR ? B1EN : 0; B1DATA_Q <= B1DATA; end
endgenerate
assign A1DATA[ 8: 0] = transparent_cycle[0] ? B1DATA_Q[ 8: 0] : A1DATA_BUF[ 8: 0];
assign A1DATA[17: 9] = transparent_cycle[1] ? B1DATA_Q[17: 9] : A1DATA_BUF[17: 9];
assign A1DATA_BUF = { DOP[1], DO[15: 8], DOP[0], DO[ 7: 0] };
assign { DIP[1], DI[15: 8], DIP[0], DI[ 7: 0] } = B1DATA;
RAMB18E1 #(
.RAM_MODE("TDP"),
.READ_WIDTH_A(18),
.READ_WIDTH_B(18),
.WRITE_WIDTH_A(18),
.WRITE_WIDTH_B(18),
.WRITE_MODE_A(TRANSP2 ? "WRITE_FIRST" : "READ_FIRST"),
.WRITE_MODE_B(TRANSP2 ? "WRITE_FIRST" : "READ_FIRST")
) _TECHMAP_REPLACE_ (
.DIADI(16'b0),
.DIPADIP(2'b0),
.DOADO(DO[15:0]),
.DOPADOP(DOP[1:0]),
.ADDRARDADDR(A1ADDR_14),
.CLKARDCLK(CLKPOL2 ? CLK2 : ~CLK2),
.ENARDEN(|1),
.REGCEAREGCE(|1),
.RSTRAMARSTRAM(|0),
.RSTREGARSTREG(|0),
.WEA(2'b0),
.DIBDI(DI[15:0]),
.DIPBDIP(DIP[1:0]),
.ADDRBWRADDR(B1ADDR_14),
.CLKBWRCLK(CLKPOL3 ? CLK3 : ~CLK3),
.ENBWREN(|1),
.REGCEB(|0),
.RSTRAMB(|0),
.RSTREGB(|0),
.WEBWE({2'b00, B1EN})
);
endmodule

2
techlibs/xilinx/tests/bram1.sh
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@ -1,5 +1,7 @@
#!/bin/bash
set -e
use_xsim=false
unisims=/opt/Xilinx/Vivado/2014.4/data/verilog/src/unisims

2
techlibs/xilinx/tests/bram1_tb.v
View File

@ -70,7 +70,7 @@ module bram1_tb #(
expected_rd[j] = RD_DATA[j];
end
$display("#OUT# | WA=%x WD=%x WE=%x | RA=%x RD=%x | %s", WR_ADDR, WR_DATA, WR_EN, RD_ADDR, RD_DATA, expected_rd === RD_DATA ? "ok" : "ERROR");
$display("#OUT# %3d | WA=%x WD=%x WE=%x | RA=%x RD=%x | %s", i, WR_ADDR, WR_DATA, WR_EN, RD_ADDR, RD_DATA, expected_rd === RD_DATA ? "ok" : "ERROR");
if (expected_rd !== RD_DATA) begin -> error; error_ind = ~error_ind; end
end
end