mirror of
https://github.com/retroSoC/retroSoC.git
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maksyuki
dd3ee032b2
Implement the memory replacement required by chapter 3 of the OpenC906 integration manual for the Mini HP core. The eight aq_spsram_* single-port SRAM wrappers (BHT, ICache data/tag, DCache data/dirty/tag, JTLB data/tag) gain reviewed overrides in rtl/mini/ip_overrides/, registered in scripts/generate_openc906.py with sha256 pins on the vendored files at the locked revision b0c06eb1. Each override keeps the upstream behavioral aq_f_spsram_* instance byte-identical by default; only PDK_IHP130 + HAVE_SRAM_MACRO without PDK_BEHAV instantiates IHP130 RM_IHPSG13_1P_* macros, stacked per manual section 3.1.5 (depth stacks with a read-registered bank select, width stacks, zero-padded unused write-mask bits). Macro ports map CEN/GWEN/WEN onto A_MEN/A_WEN/A_REN/A_BM with A_DLY tied high and BIST pins tied off, matching the tc_sram.sv convention. Committed CI profiles keep PDK_BEHAV=YES, so their simulation results are unchanged. The Makefile also lists the new overrides as prerequisites of the generated-filelist stamp so editing one forces regeneration. Evidence: directed 8-wrapper equivalence TB (behavioral vs macro, Icarus) and the manual section 3.2 MEM_INTF suite adapted to Icarus both pass on the macro path.
139 lines
3.8 KiB
Verilog
139 lines
3.8 KiB
Verilog
// retroSoC controlled override of the vendored OpenC906 aq_spsram_1024x16.v.
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//
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// Source: openc906 dependency (dependencies.lock.json "openc906"),
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// C906_RTL_FACTORY/gen_rtl/ifu/rtl/aq_spsram_1024x16.v
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// revision b0c06eb1f8b3bae663bd8b87eac89ff48e68a57f
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// License: Apache-2.0 (T-Head Semiconductor)
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//
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// retroSoC change (OpenC906 integration manual chapter 3 SRAM swap): with
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// PDK_IHP130+HAVE_SRAM_MACRO and without PDK_BEHAV, the 1024x16 BHT RAM is
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// built from one RM_IHPSG13_1P_1024x32_c2_bm_bist macro; only the low 16
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// bits are used and the upper mask bits are tied off so they are never
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// written. Every other configuration keeps the upstream behavioral
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// aq_f_spsram_1024x16 instance byte-identical. Keep in sync when the lock
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// revision changes.
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/*Copyright 2020-2021 T-Head Semiconductor Co., Ltd.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// &ModuleBeg; @22
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module aq_spsram_1024x16(
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A,
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CEN,
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CLK,
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D,
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GWEN,
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Q,
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WEN
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);
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// &Ports; @23
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input [9 :0] A;
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input CEN;
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input CLK;
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input [15:0] D;
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input GWEN;
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input [15:0] WEN;
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output [15:0] Q;
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// &Regs; @24
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// &Wires; @25
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wire [9 :0] A;
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wire CEN;
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wire CLK;
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wire [15:0] D;
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wire GWEN;
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wire [15:0] Q;
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wire [15:0] WEN;
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//**********************************************************
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// Parameter Definition
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//**********************************************************
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parameter ADDR_WIDTH = 10;
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parameter DATA_WIDTH = 16;
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parameter WE_WIDTH = 16;
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// &Force("bus","Q",DATA_WIDTH-1,0); @34
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// &Force("bus","WEN",WE_WIDTH-1,0); @35
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// &Force("bus","A",ADDR_WIDTH-1,0); @36
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// &Force("bus","D",DATA_WIDTH-1,0); @37
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`ifdef PDK_IHP130
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`ifdef HAVE_SRAM_MACRO
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`ifndef PDK_BEHAV
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`define _AQ_SPSRAM_1024X16_IHP130_
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`endif
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`endif
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`endif
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`ifdef _AQ_SPSRAM_1024X16_IHP130_
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//********************************************************
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//* IHP130 SRAM macro *
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//********************************************************
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// One 1024x32 macro supplies the 1024x16 BHT RAM; the upper 16 bits are
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// masked off so they are never written.
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wire [31:0] s_dout;
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wire [15:0] s_dout_unused;
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assign Q = s_dout[15:0];
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assign s_dout_unused = s_dout[31:16];
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RM_IHPSG13_1P_1024x32_c2_bm_bist u_mem (
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.A_CLK (CLK ),
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.A_ADDR (A ),
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.A_BM ({16'b0, ~WEN} ),
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.A_MEN (~CEN ),
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.A_WEN (~GWEN ),
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.A_REN (GWEN ),
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.A_DIN ({16'b0, D} ),
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.A_DOUT (s_dout ),
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.A_DLY (1'b1 ),
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.A_BIST_CLK (1'b0 ),
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.A_BIST_EN (1'b0 ),
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.A_BIST_MEN (1'b0 ),
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.A_BIST_WEN (1'b0 ),
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.A_BIST_REN (1'b0 ),
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.A_BIST_ADDR(10'b0 ),
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.A_BIST_DIN (32'b0 ),
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.A_BIST_BM (32'b0 )
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);
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`else
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//********************************************************
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//* FPGA memory *
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//********************************************************
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// &Instance("aq_f_spsram_1024x16"); @43
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aq_f_spsram_1024x16 x_aq_f_spsram_1024x16 (
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.A (A ),
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.CEN (CEN ),
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.CLK (CLK ),
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.D (D ),
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.GWEN (GWEN),
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.Q (Q ),
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.WEN (WEN )
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);
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`endif
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`ifdef _AQ_SPSRAM_1024X16_IHP130_
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`undef _AQ_SPSRAM_1024X16_IHP130_
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`endif
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// &Instance("aq_tsmc_spsram_1024x16"); @49
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// &Instance("aq_umc_spsram_1024x16"); @61
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// &ModuleEnd; @65
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endmodule
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