| Line 145... |
Line 145... |
assign id_precalc_sum = id_addrbase[`OR1200_LSUEA_PRECALC-1:0] +
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assign id_precalc_sum = id_addrbase[`OR1200_LSUEA_PRECALC-1:0] +
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id_addrofs[`OR1200_LSUEA_PRECALC-1:0];
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id_addrofs[`OR1200_LSUEA_PRECALC-1:0];
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always @(posedge clk or `OR1200_RST_EVENT rst) begin
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always @(posedge clk or `OR1200_RST_EVENT rst) begin
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if (rst == `OR1200_RST_VALUE)
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if (rst == `OR1200_RST_VALUE)
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dcpu_adr_r <= {`OR1200_LSUEA_PRECALC{1'b0}};
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dcpu_adr_r <= {`OR1200_LSUEA_PRECALC+1{1'b0}};
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else if (!ex_freeze)
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else if (!ex_freeze)
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dcpu_adr_r <= id_precalc_sum;
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dcpu_adr_r <= id_precalc_sum;
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end
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end
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//
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//
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| Line 179... |
Line 179... |
assign except_dbuserr = dcpu_err_i & (dcpu_tag_i == `OR1200_DTAG_BE);
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assign except_dbuserr = dcpu_err_i & (dcpu_tag_i == `OR1200_DTAG_BE);
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//
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//
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// External I/F assignments
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// External I/F assignments
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//
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//
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assign dcpu_adr_o[31:`OR1200_LSUEA_PRECALC] = ex_addrbase[31:`OR1200_LSUEA_PRECALC] + ex_addrofs[31:`OR1200_LSUEA_PRECALC] + dcpu_adr_r[`OR1200_LSUEA_PRECALC]; // carry
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assign dcpu_adr_o[31:`OR1200_LSUEA_PRECALC] =
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ex_addrbase[31:`OR1200_LSUEA_PRECALC] +
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(ex_addrofs[31:`OR1200_LSUEA_PRECALC] +
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// carry from precalc, pad to 30-bits
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{{(32-`OR1200_LSUEA_PRECALC)-1{1'b0}},
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dcpu_adr_r[`OR1200_LSUEA_PRECALC]});
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assign dcpu_adr_o[`OR1200_LSUEA_PRECALC-1:0] = dcpu_adr_r[`OR1200_LSUEA_PRECALC-1:0];
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assign dcpu_adr_o[`OR1200_LSUEA_PRECALC-1:0] = dcpu_adr_r[`OR1200_LSUEA_PRECALC-1:0];
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assign dcpu_cycstb_o = du_stall | lsu_unstall | except_align ?
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assign dcpu_cycstb_o = du_stall | lsu_unstall | except_align ?
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1'b0 : |ex_lsu_op;
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1'b0 : |ex_lsu_op;
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assign dcpu_we_o = ex_lsu_op[3];
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assign dcpu_we_o = ex_lsu_op[3];
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assign dcpu_tag_o = dcpu_cycstb_o ? `OR1200_DTAG_ND : `OR1200_DTAG_IDLE;
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assign dcpu_tag_o = dcpu_cycstb_o ? `OR1200_DTAG_ND : `OR1200_DTAG_IDLE;
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always @(ex_lsu_op or dcpu_adr_o)
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always @(ex_lsu_op or dcpu_adr_o)
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casex({ex_lsu_op, dcpu_adr_o[1:0]})
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casez({ex_lsu_op, dcpu_adr_o[1:0]})
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{`OR1200_LSUOP_SB, 2'b00} : dcpu_sel_o = 4'b1000;
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{`OR1200_LSUOP_SB, 2'b00} : dcpu_sel_o = 4'b1000;
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{`OR1200_LSUOP_SB, 2'b01} : dcpu_sel_o = 4'b0100;
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{`OR1200_LSUOP_SB, 2'b01} : dcpu_sel_o = 4'b0100;
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{`OR1200_LSUOP_SB, 2'b10} : dcpu_sel_o = 4'b0010;
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{`OR1200_LSUOP_SB, 2'b10} : dcpu_sel_o = 4'b0010;
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{`OR1200_LSUOP_SB, 2'b11} : dcpu_sel_o = 4'b0001;
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{`OR1200_LSUOP_SB, 2'b11} : dcpu_sel_o = 4'b0001;
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{`OR1200_LSUOP_SH, 2'b00} : dcpu_sel_o = 4'b1100;
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{`OR1200_LSUOP_SH, 2'b00} : dcpu_sel_o = 4'b1100;
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