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authorClifford Wolf <clifford@clifford.at>2015-04-19 21:37:40 +0200
committerClifford Wolf <clifford@clifford.at>2015-04-19 21:37:40 +0200
commit1277d1bcb8c325d1c7addafee9da90b521bc0da6 (patch)
tree6eb2603522717a915ac08a04ade3dc44120285c7 /techlibs
parent7ff802e199d231029f735a3e37bec508e0d840c5 (diff)
iCE40: Added SB_RAM40_4K{,NR,NW,NRNW}* models
Diffstat (limited to 'techlibs')
-rw-r--r--techlibs/ice40/cells_sim.v302
1 files changed, 289 insertions, 13 deletions
diff --git a/techlibs/ice40/cells_sim.v b/techlibs/ice40/cells_sim.v
index def87821..4a11e4a9 100644
--- a/techlibs/ice40/cells_sim.v
+++ b/techlibs/ice40/cells_sim.v
@@ -243,13 +243,293 @@ module SB_DFFNES (output reg Q, input C, E, S, D);
Q <= D;
endmodule
-// Packed IceStorm Logic Cells
+// SiliconBlue RAM Cells
+
+module SB_RAM40_4K (
+ output reg [15:0] RDATA,
+ input RCLK, RCLKE, RE,
+ input [10:0] RADDR,
+ input WCLK, WCLKE, WE,
+ input [10:0] WADDR,
+ input [15:0] MASK, WDATA
+);
+ // MODE 0: 256 x 16
+ // MODE 1: 512 x 8
+ // MODE 2: 1024 x 4
+ // MODE 3: 2048 x 2
+ parameter WRITE_MODE = 0;
+ parameter READ_MODE = 0;
+
+ parameter INIT_0 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_4 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_5 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_6 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_7 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_8 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_9 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+
+`ifndef BLACKBOX
+ integer i;
+ reg [15:0] memory [0:255];
+
+ initial begin
+ for (i=0; i<16; i=i+1) begin
+ memory[ 0*16 + i] <= INIT_0[16*i +: 16];
+ memory[ 1*16 + i] <= INIT_1[16*i +: 16];
+ memory[ 2*16 + i] <= INIT_2[16*i +: 16];
+ memory[ 3*16 + i] <= INIT_3[16*i +: 16];
+ memory[ 4*16 + i] <= INIT_4[16*i +: 16];
+ memory[ 5*16 + i] <= INIT_5[16*i +: 16];
+ memory[ 6*16 + i] <= INIT_6[16*i +: 16];
+ memory[ 7*16 + i] <= INIT_7[16*i +: 16];
+ memory[ 8*16 + i] <= INIT_8[16*i +: 16];
+ memory[ 9*16 + i] <= INIT_9[16*i +: 16];
+ memory[10*16 + i] <= INIT_A[16*i +: 16];
+ memory[11*16 + i] <= INIT_B[16*i +: 16];
+ memory[12*16 + i] <= INIT_C[16*i +: 16];
+ memory[13*16 + i] <= INIT_D[16*i +: 16];
+ memory[14*16 + i] <= INIT_E[16*i +: 16];
+ memory[15*16 + i] <= INIT_F[16*i +: 16];
+ end
+ end
+
+ always @(posedge WCLK) begin
+ if (WE && WCLKE) begin
+ if (WRITE_MODE == 0) begin
+ for (i=0; i<16; i=i+1)
+ if (MASK[i]) memory[WADDR[7:0]][i] <= WDATA[i];
+ end
+ if (WRITE_MODE == 1) begin
+ for (i=0; i<2; i=i+1)
+ if (WADDR[0] == i) memory[WADDR[8:1]][i*8 +: 8] <= WDATA[i][7:0];
+ end
+ if (WRITE_MODE == 2) begin
+ for (i=0; i<4; i=i+1)
+ if (WADDR[1:0] == i) memory[WADDR[9:2]][i*4 +: 4] <= WDATA[i][3:0];
+ end
+ if (WRITE_MODE == 3) begin
+ for (i=0; i<8; i=i+1)
+ if (WADDR[2:0] == i) memory[WADDR[10:3]][i*2 +: 2] <= WDATA[i][1:0];
+ end
+ end
+ end
+
+ always @(posedge RCLK) begin
+ if (RE && RCLKE) begin
+ if (READ_MODE == 0) begin
+ RDATA <= memory[RADDR[7:0]];
+ end
+ if (READ_MODE == 1) begin
+ RDATA <= memory[RADDR[8:1]][RADDR[0]*8 +: 8];
+ end
+ if (READ_MODE == 2) begin
+ RDATA <= memory[RADDR[9:2]][RADDR[1:0]*4 +: 4];
+ end
+ if (READ_MODE == 3) begin
+ RDATA <= memory[RADDR[10:3]][RADDR[2:0]*2 +: 2];
+ end
+ end
+ end
+`endif
+endmodule
-module ICESTORM_CARRYCONST (output COUT);
- parameter [0:0] CARRYCONST = 0;
- assign COUT = CARRYCONST;
+module SB_RAM40_4KNR (
+ output [15:0] RDATA,
+ input RCLK, RCLKE, RE,
+ input [10:0] RADDR,
+ input WCLK, WCLKE, WE,
+ input [10:0] WADDR,
+ input [15:0] MASK, WDATA
+);
+ parameter WRITE_MODE = 0;
+ parameter READ_MODE = 0;
+
+ parameter INIT_0 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_4 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_5 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_6 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_7 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_8 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_9 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+
+ SB_RAM40_4K #(
+ .WRITE_MODE(WRITE_MODE),
+ .READ_MODE (READ_MODE ),
+ .INIT_0 (INIT_0 ),
+ .INIT_1 (INIT_1 ),
+ .INIT_2 (INIT_2 ),
+ .INIT_3 (INIT_3 ),
+ .INIT_4 (INIT_4 ),
+ .INIT_5 (INIT_5 ),
+ .INIT_6 (INIT_6 ),
+ .INIT_7 (INIT_7 ),
+ .INIT_8 (INIT_8 ),
+ .INIT_9 (INIT_9 ),
+ .INIT_A (INIT_A ),
+ .INIT_B (INIT_B ),
+ .INIT_C (INIT_C ),
+ .INIT_D (INIT_D ),
+ .INIT_E (INIT_E ),
+ .INIT_F (INIT_F )
+ ) RAM (
+ .RDATA(RDATA),
+ .RCLK (~RCLK),
+ .RCLKE(RCLKE),
+ .RE (RE ),
+ .RADDR(RADDR),
+ .WCLK (WCLK ),
+ .WCLKE(WCLKE),
+ .WE (WE ),
+ .WADDR(WADDR),
+ .MASK (MASK ),
+ .WDATA(WDATA)
+ );
endmodule
+module SB_RAM40_4KNW (
+ output [15:0] RDATA,
+ input RCLK, RCLKE, RE,
+ input [10:0] RADDR,
+ input WCLK, WCLKE, WE,
+ input [10:0] WADDR,
+ input [15:0] MASK, WDATA
+);
+ parameter WRITE_MODE = 0;
+ parameter READ_MODE = 0;
+
+ parameter INIT_0 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_4 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_5 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_6 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_7 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_8 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_9 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+
+ SB_RAM40_4K #(
+ .WRITE_MODE(WRITE_MODE),
+ .READ_MODE (READ_MODE ),
+ .INIT_0 (INIT_0 ),
+ .INIT_1 (INIT_1 ),
+ .INIT_2 (INIT_2 ),
+ .INIT_3 (INIT_3 ),
+ .INIT_4 (INIT_4 ),
+ .INIT_5 (INIT_5 ),
+ .INIT_6 (INIT_6 ),
+ .INIT_7 (INIT_7 ),
+ .INIT_8 (INIT_8 ),
+ .INIT_9 (INIT_9 ),
+ .INIT_A (INIT_A ),
+ .INIT_B (INIT_B ),
+ .INIT_C (INIT_C ),
+ .INIT_D (INIT_D ),
+ .INIT_E (INIT_E ),
+ .INIT_F (INIT_F )
+ ) RAM (
+ .RDATA(RDATA),
+ .RCLK (RCLK ),
+ .RCLKE(RCLKE),
+ .RE (RE ),
+ .RADDR(RADDR),
+ .WCLK (~WCLK),
+ .WCLKE(WCLKE),
+ .WE (WE ),
+ .WADDR(WADDR),
+ .MASK (MASK ),
+ .WDATA(WDATA)
+ );
+endmodule
+
+module SB_RAM40_4KNRNW (
+ output [15:0] RDATA,
+ input RCLK, RCLKE, RE,
+ input [10:0] RADDR,
+ input WCLK, WCLKE, WE,
+ input [10:0] WADDR,
+ input [15:0] MASK, WDATA
+);
+ parameter WRITE_MODE = 0;
+ parameter READ_MODE = 0;
+
+ parameter INIT_0 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_4 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_5 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_6 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_7 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_8 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_9 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+
+ SB_RAM40_4K #(
+ .WRITE_MODE(WRITE_MODE),
+ .READ_MODE (READ_MODE ),
+ .INIT_0 (INIT_0 ),
+ .INIT_1 (INIT_1 ),
+ .INIT_2 (INIT_2 ),
+ .INIT_3 (INIT_3 ),
+ .INIT_4 (INIT_4 ),
+ .INIT_5 (INIT_5 ),
+ .INIT_6 (INIT_6 ),
+ .INIT_7 (INIT_7 ),
+ .INIT_8 (INIT_8 ),
+ .INIT_9 (INIT_9 ),
+ .INIT_A (INIT_A ),
+ .INIT_B (INIT_B ),
+ .INIT_C (INIT_C ),
+ .INIT_D (INIT_D ),
+ .INIT_E (INIT_E ),
+ .INIT_F (INIT_F )
+ ) RAM (
+ .RDATA(RDATA),
+ .RCLK (~RCLK),
+ .RCLKE(RCLKE),
+ .RE (RE ),
+ .RADDR(RADDR),
+ .WCLK (~WCLK),
+ .WCLKE(WCLKE),
+ .WE (WE ),
+ .WADDR(WADDR),
+ .MASK (MASK ),
+ .WDATA(WDATA)
+ );
+endmodule
+
+// Packed IceStorm Logic Cells
+
module ICESTORM_LC (
input I0, I1, I2, I3, CIN, CLK, CEN, SR,
output O, COUT
@@ -272,20 +552,16 @@ module ICESTORM_LC (
wire polarized_clk;
assign polarized_clk = CLK ^ NEG_CLK;
- wire filtered_cen, filtered_sr;
- assign filtered_cen = CEN === 1'bz ? 1'b1 : CEN;
- assign filtered_sr = SR === 1'bz ? 1'b0 : SR;
-
reg o_reg;
always @(posedge polarized_clk)
- if (filtered_cen)
- o_reg <= filtered_sr ? SET_NORESET : lut_o;
+ if (CEN)
+ o_reg <= SR ? SET_NORESET : lut_o;
reg o_reg_async;
- always @(posedge polarized_clk, posedge filtered_sr)
- if (filtered_sr)
+ always @(posedge polarized_clk, posedge SR)
+ if (SR)
o_reg <= SET_NORESET;
- else if (filtered_cen)
+ else if (CEN)
o_reg <= lut_o;
assign O = DFF_ENABLE ? ASYNC_SR ? o_reg_async : o_reg : lut_o;