{"id":70,"date":"2019-12-17T17:32:55","date_gmt":"2019-12-17T09:32:55","guid":{"rendered":"http:\/\/blog.cyasylum.top\/?p=70"},"modified":"2019-12-18T00:48:54","modified_gmt":"2019-12-17T16:48:54","slug":"%e6%b5%85%e5%85%a5%e6%b5%85%e5%87%bacpu%e6%80%bb%e7%ba%bf%e9%80%9a%e4%bf%a1","status":"publish","type":"post","link":"http:\/\/blog.cyasylum.top\/index.php\/2019\/12\/17\/%e6%b5%85%e5%85%a5%e6%b5%85%e5%87%bacpu%e6%80%bb%e7%ba%bf%e9%80%9a%e4%bf%a1\/","title":{"rendered":"\u6d45\u5165\u6d45\u51faCPU\u603b\u7ebf\u901a\u4fe1"},"content":{"rendered":"

\u2014\u2014\u5173\u4e8e\u600e\u4e48\u6740\u6570\u5b57\u7cfb\u7edf\u4e0e\u5904\u7406\u5668\u5b9e\u9a8c\u5927\u4f5c\u4e1a<\/em><\/h3>\n

\u7b14\u8005\u7531\u4e8e\u8fd1\u4e09\u65e5\u8bf4\u8bdd\u8fc7\u591a\u548c\u957f\u671f\u611f\u5192\u5bfc\u81f4\u4e86\u5f88\u5927\u7a0b\u5ea6\u7684\u5636\u54d1\uff0c\u9042\u51b3\u5b9a\u9488\u5bf9CPU\u4e00\u4e8b\u8c22\u7edd\u8425\u4e1a\u3002\u4e3a\u4e86\u4f7f\u66f4\u591a\u7684\u53d7\u96be\u8005\u9003\u79bb\u64cd\u4f5c\u8003\u8bd5\u7684\u5669\u68a6\u4ee5\u53ca\u9ec4\u59d3\u9b54\u9b3c\u7684\u538b\u8feb\uff0c\u9042\u5c1d\u8bd5\u51fa\u54c1\u6b64\u7bc7\u6587\u6863\uff0c\u4e00\u662f\u5bf9\u8fd1\u65e5\u81ea\u4e60\u7ed3\u679c\u8fdb\u884c\u4e00\u4e2a\u7b80\u5355\u7684\u603b\u7ed3\uff0c\u4e5f\u5e0c\u671b\u80fd\u6216\u591a\u6216\u5c11\u8d77\u5230\u4e00\u70b9\u5e2e\u52a9\u3002<\/p>\n

\u9996\u5148\u4ece\u6211\u4eec\u9700\u8981\u505a\u4ec0\u4e48\u5f00\u59cb\u221a<\/p>\n

\u6309\u9ec4\u7ee7\u4e1a\u7684\u539f\u8bdd\uff0c\u6211\u4eec\u9700\u8981\u5236\u4f5c\u4e00\u4e2a\u4ee5RISC-V\u6307\u4ee4\u96c6\u4e3a\u57fa\u7840\u7684\uff0c\u7ecf\u7531CPU\u4e0e\u6c47\u7f16\u4ee3\u7801\u5bf9\u5bc4\u5b58\u5668\/\u50a8\u5b58\u5668\u7684\u64cd\u4f5c\u8fdb\u884c\u4e2d\u8f6c\uff0c\u901a\u8fc7\u53ef\u53d8\/\u6052\u5b9a\u7684\u8f93\u5165\uff0c\u5728\u786c\u4ef6\u4e0a\u5b8c\u6210\u4efb\u610f\u8f93\u51fa\u7684\u7cfb\u7edf\u3002\u5176\u4e2d\u6052\u5b9a\u8f93\u5165\u53ef\u4ee5\u76f4\u63a5\u7531\u6c47\u7f16\u4ee3\u7801\u7684\u987a\u5e8f\u903b\u8f91\u5b8c\u6210\uff0c\u800c\u53ef\u53d8\u8f93\u5165\u5219\u9700\u8981\u901a\u8fc7CPU\u5bf9\u5916\u8bbe\u8fdb\u884c\u8bfb\u53d6\uff0c\u5e76\u642d\u914d\u6c47\u7f16\u4e2d\u5faa\u73af\/\u987a\u5e8f\/\u5206\u652f\u7b49\u903b\u8f91\u7ed3\u6784\u5bf9\u8f93\u5165\u53d8\u91cf\u8fdb\u884c\u8bfb\u53d6\uff0c\u4ece\u800c\u5f71\u54cd\u8f93\u51fa\u3002\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\u6709\u4e24\u4e2a\u6bd4\u8f83\u5bb9\u6613\u9020\u6210\u963b\u529b\u7684\u96be\u70b9\uff0c\u4e00\u662f\u5bf9\u603b\u7ebf\u529f\u80fd\u548cCPU\u8bfb\u53d6\u903b\u8f91\u7684\u4e0d\u7406\u89e3\uff0c\u4e8c\u5219\u662f\u5bf9\u6c47\u7f16\u529f\u80fd\u7684\u4e0d\u719f\u6089\uff0c\u7a0b\u5e8f\u601d\u7ef4\u4e00\u65f6\u96be\u4ee5\u4ece\u719f\u6089\u7684\u7f16\u7a0b\u8bed\u8a00\u5230\u6c47\u7f16\u8fdb\u884c\u8f6c\u5316\u3002\u867d\u7136\u5f52\u7ed3\u5230\u5e95\u90fd\u662f\u56e0\u4e3a\u9ec4\u8001\u5e08\u7684\u5907\u8bfe\u4e0d\u5229\uff0c\u4f4e\u4f30\u6216\u9ad8\u4f30\u4e86\u5b66\u751f\u7684\u7406\u89e3\u80fd\u529b\u548c\u7b97\u6cd5\u57fa\u7840\uff0c\u4ee5\u53ca\u5ffd\u7565\u4e86Verilog HDL\u5230System Verilog\u5728\u90e8\u5206\u6a21\u5757\u4e0a\u7684\u4ee3\u7801\u7406\u89e3\u963b\u529b\uff0c\u5e0c\u671b\u9ec4\u8001\u5e08\u5728\u4e0b\u4e2a\u5b66\u671f\u7684\u6388\u8bfe\u4e2d\u80fd\u591a\u52a0\u6ce8\u610f\uff0c\u5584\u5f85\u6211\u4eec\u53ef\u7231\u7684\u5b66\u5f1f\u5b66\u59b9\u4eec\u221a<\/p>\n

\u7531\u4e8e\u8f93\u51fa\u7684\u4ee3\u7801\u5df2\u7ecf\u7ed9\u51fa\uff0c\u9042\u4e0d\u8be6\u7ec6\u8bb2\u89e3\u8f93\u51fa\u90e8\u5206\u7684\u903b\u8f91\uff0c\u800c\u662f\u9488\u5bf9\u8fd9\u4e24\u5929\u53d1\u73b0\u7684\u91cd\u5ea6\u56f0\u6270\u95ee\u9898\u65e2\u5982\u4f55\u5bf9CPU\u8fdb\u884c\u8f93\u5165\u8fdb\u884c\u7740\u624b\u3002<\/p>\n

\u786c\u4ef6\u8f93\u5165\u903b\u8f91<\/h2>\n

\u4ee5\u7fa4\u6587\u4ef6\u4e2d\u54ea\u4e2a\u6c99\u96d5\u6309\u94ae\u63a7\u5236.zip<\/em>\u6587\u4ef6\u4e2d\u7684\u4ee3\u7801\u4e3a\u4f8b<\/p>\n

\u6211\u6700\u6068\u90a3\u4e9b\u5f00\u6e90\u4ee3\u7801\u4e0d\u6ce8\u91ca\u8fd8\u6e9c\u4e86\u4e00\u5927\u5806\u4ee3\u7801\u5197\u4f59\u7684\u4e8c\u8d27\u4e86\uff0c\u770b\u5728\u4ed6\u521a\u521a\u8bf7\u4e86\u6211\u4e24\u9897\u751f\u714e\u7684\u9762\u5b50\u4e0a\u539f\u8c05\u4ed6\u5e76\u505a\u51fa\u90e8\u5206\u8865\u5145<\/em><\/p>\n

module key_write(\n    input clk,\n    input rst_n,\n    \/\/\u8f93\u5165\u5916\u90e8\u8f93\u5165\u4fe1\u53f7\n    input [3:0] key,\n    \/\/\u603b\u7ebf\u8fde\u63a5\u4fe1\u53f7\uff0c\u5e94\u8be5\u53ef\u4ee5\u968f\u7f18\u5b9a\u4e49i\/o\n    input rd_req,\n    input [31:0] rd_addr,\n    input [31:0] rd_data,         \n    input rd_gnt\n    );\n    \/\/\u65e0\u5173\u8f93\u5165\u4e2d\u95f4\u53d8\u91cf\n    reg [7:0] key_sig = 0;\n    reg [3:0] key_state = 0;\n    \/\/\u8f93\u5165\u5224\u65ad\u53d8\u91cf\u9884\u5904\u7406\n    wire cell_rd_addr;\n    assign rd_gnt = rd_req;\n    assign cell_rd_addr = (rd_addr[31:2] == 30'h0);\n    \/\/\u8f93\u5165\u4fe1\u53f7\u53d8\u91cf\u9884\u5904\u7406\n    reg [31:0] rdata;\n    assign rd_data = rdata;\n    \/\/\u8f93\u5165\u903b\u8f91\u4e3b\u4f53\uff0c\u662f\u8fd9\u4e2a\u90e8\u5206\u7684\u91cd\u70b9\n    always @ (posedge clk or negedge rst_n)\n        if(~rst_n)\n            rdata <= 0;\n        else if(rd_req && cell_rd_addr)\n            rdata <= {{24'b0},key_sig};\n    \/\/\u8f93\u5165\u4fe1\u606f\u5904\u7406\uff0c\u786c\u4ef6\u64cd\u4f5c\u5230\u4fe1\u53f7\u7684\u8f6c\u5316\n    always@(posedge clk or negedge rst_n) begin\n        if(~rst_n) begin\n            key_sig<=0;\n            key_state<=0;\n        end else begin\n            key_state <= key;\n        end\n        case(key_state)\n            4'b0001:  key_sig<=8'b0000_0001;\n            4'b0010:  key_sig<=8'b0000_0010;\n            4'b0100:  key_sig<=8'b0000_0100;\n            4'b1000:  key_sig<=8'b0000_1000;\n            default:  key_sig<=8'b1111_0000;\n        endcase\n    end\nendmodule<\/code><\/pre>\n
\u8fd9\u662f\u6211\u4eec\u7ed9\u51fa\u7684\u786c\u4ef6\u8bfb\u5165\u6a21\u5757\u7684\u4ee3\u7801\uff0c\u9488\u5bf9\u4e0d\u540c\u7684\u8f93\u5165\u4fe1\u606f\u5904\u7406\u6a21\u5757\u81ea\u7136\u90fd\u662f\u4e0d\u540c\u7684\uff0c\u5e0c\u671b\u5404\u8def\u4f7f\u7528\u8005\u81ea\u884c\u8865\u5145\uff0c\u6211\u4eec\u4ec5\u4ec5\u70b9\u51fa\u786c\u4ef6\u8f93\u5165\u7684\u4e3b\u4f53\u903b\u8f91\uff0c\u8fdb\u884c\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u89e3\u91ca\u3002\u5373<\/p>\n
wire cell_rd_addr;\nassign rd_gnt = rd_req;\nassign cell_rd_addr = rd_addr[31:2];\n\nreg [31:0] rdata;\nassign rd_data = rdata;\n\nalways @ (posedge clk or negedge rst_n)\n    if(~rst_n)\n        rdata <= 0;\n    else if(rd_req && cell_rd_addr == 30'b0)\n        rdata <= {\/*\u4f60\u8981\u4f20\u7ed9CPU\u7684\u4efb\u610f\u4fe1\u53f7*\/};<\/code><\/pre>\n
\u9996\u5148\u662f\u7b2c\u4e00\u90e8\u5206<\/p>\n
wire cell_rd_addr;\nassign cell_rd_addr = rd_addr[31:2];<\/code><\/pre>\n
\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7f51\u7ebf\u578b\u53d8\u91cf\uff0c\u7528\u4e8e\u8868\u793a\u603b\u7ebf\u4e2d\u7684\u5730\u5740\u4fe1\u53f7\uff0c\u5176\u4e2d\u9009\u53d6cell_rd_addr\u4e3ard_addr\uff0c\u5373\u6574\u4e2a\u603b\u7ebf\u5730\u5740\u53d8\u91cf\u768432\u52303\u4f4d\uff0c\u8fd9\u4e2a\u503c\u8868\u793a\u7684\u662fCPU\u5bf9\u8be5\u603b\u7ebf\u7684\u5bfb\u5740\u5730\u5740\uff0c\u5373CPU\u8bbf\u95ee\u5730\u5740\u76f8\u8f83\u4e8e\u603b\u7ebf\u57fa\u5730\u5740\u7684\u504f\u79fb\u91cf\u3002\u5728\u5f00\u6e90\u6587\u4ef6\u4e2d\uff0ckey_state\u6a21\u5757\u88ab\u5b9a\u4e49\u5728\u4e86\u603b\u7ebf\u76840x00032000\u20140x0003200f\u7684\u4f4d\u7f6e\uff0c\u8fd9\u91cc\u53d6cell_rd_addr == 30'b0\uff0c\u5373\u8868\u793a\u603b\u7ebf\u57fa\u5730\u5740\u504f\u79fb0\u7684\u5730\u5740\uff1a0x00032000\u3002<\/p>\n
\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u53ef\u4ee5\u7b80\u5355\u89e3\u91ca\u4e00\u4e0bCPU\u4e0e\u603b\u7ebf\u8fdb\u884c\u901a\u4fe1\u7684\u539f\u7406<\/p>\n
\"CPU\u603b\u7ebf\u901a\u4fe1\"<\/p>\n
\u8fd9\u662f\u6211\u6628\u5929\u4e34\u65f6\u753b\u7684\u56fe\u7247\uff0c\u8d77\u521d\u662f\u914d\u5408\u6587\u5b57\u52a0\u4ee5\u89e3\u91ca\u7684\uff0c\u4f46\u662f\u788d\u4e8e\u8bed\u8a00\u901a\u987a\u5ea6\u5c31\u6ca1\u6709\u53d1\u51fa\u6765\u3002<\/p>\n
\u5f53CPU\u8bbf\u95ee\u603b\u7ebf\u4e0a\u7684\u5730\u5740\uff08\u53ef\u4ee5\u7406\u89e3\u4e3a\u5916\u8bbe\uff0c\u65e2\u6c47\u7f16\u4ee3\u7801\u6267\u884c\u5668\u4e4b\u5916\u7684\u4efb\u4f55\u90e8\u5206\uff09\u65f6\uff0cCPU\u4f1a\u5411\u5916\u8bbe\u53d1\u9001\u4e00\u4e2a\u8bbf\u95ee\u8bf7\u6c42request\uff0c\u548c\u4e00\u4e2a\u8bbf\u95ee\u5730\u5740address\uff0c\u4ee5\u786e\u5b9a\u5916\u8bbe\u662f\u5426\u51c6\u5907\u597d\u63a5\u53d7CPU\u7684\u8bbf\u95ee\u3002\u5f53\u5916\u8bbe\u8d4b\u4e88CPU\u8bbf\u95ee\u6743\u9650grant\u7684\u540c\u65f6\uff0c\u4f1a\u5728\u603b\u7ebf\u4e0a\u7684data\u4f4d\u7f6e\u7ed9\u51fa\u4e00\u4e2a\u8fd4\u56de\u503c\u3002\u5f53CPU\u83b7\u5f97\u4e86\u6279\u51c6grant\u65f6\uff0c\u4fbf\u4f1a\u81ea\u52a8\u8bfb\u5165\u603b\u7ebf\u4e0a\u7684data\u4fe1\u53f7\uff0c\u5c06\u5176\u89c6\u4e3a\u5916\u8bbe\u7684\u8fd4\u56de\u503c\u3002\u800c\u8fd9\u4e5f\u5c31\u662f\u6211\u4eec\u8fdb\u884c\u6240\u8c13\u201c\u5077\u5929\u6362\u65e5\u201d\u7684CPU\u903b\u8f91\u57fa\u7840\u3002<\/p>\n
\u63a5\u4e0b\u6765\u6211\u4eec\u770b\u5230\u7b2c\u4e8c\u884c<\/p>\n
assign rd_gnt = rd_req;<\/code><\/pre>\n
\u6211\u4eec\u5728\u786c\u4ef6\u4e0a\u5c06\u8bf7\u6c42\u4e0e\u6279\u51c6\u8054\u7cfb\u4e86\u8d77\u6765\u3002\u56e0\u4e3a\u6211\u4eec\u5efa\u7acb\u7684\u4e0d\u662f\u4e00\u4e2a\u590d\u6742\u7684\uff0c\u62e5\u6709\u5b8c\u6574\u5b89\u5168\u6027\u7684\u6a21\u5757\uff0c\u6240\u4ee5\u5e76\u4e0d\u5177\u6709\u6279\u590dCPU\u8bf7\u6c42\u7684\u529f\u80fd\uff0c\u9042\u6211\u4eec\u4f7f\u786c\u4ef6\u81ea\u52a8\u53cd\u9988\uff0c\u6210\u4e3a\u9a84\u50b2\u7684\u516c\u4ea4\u8f66\uff08\u5927\u96fe\u3002\u5373CPU\u5728\u8fdb\u884c\u8bf7\u6c42\u540e\u5c06\u7acb\u5373\u8bfb\u56de\u53cd\u9988\u4fe1\u606f\u3002\u63a5\u4e0b\u6765\u6211\u4eec\u7ed9\u5230\u4ee3\u7801\u6700\u4e3b\u8981\u7684\u90e8\u5206<\/p>\n
reg [31:0] rdata;\nassign rd_data = rdata;\nalways @ (posedge clk or negedge rst_n)\n    if(~rst_n)\n        rdata <= 0;\n    else if(rd_req && cell_rd_addr == 30'b0)\n        rdata <= {\/*\u4f60\u8981\u4f20\u7ed9CPU\u7684\u4efb\u610f\u4fe1\u53f7*\/};<\/code><\/pre>\n
\u5176\u5b83\u90fd\u4e0d\u7b97\u91cd\u70b9\uff0c\u91cd\u4e2d\u4e4b\u91cd\u53ea\u6709\u7b2c\u516d\u884c\u7684\u6761\u4ef6\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u7684\u7406\u89e3\u5230\uff0c\u8fd9\u4e2a\u5224\u65ad\u6761\u4ef6\u4e3a\uff0cCPU\u5bf9\u603b\u7ebf\u7684\u57fa\u5730\u5740\u8fdb\u884c\u8bbf\u95ee\u3002\u800c\u5728\u8fd9\u4e2a\u65f6\u5019\uff0c\u6211\u4eec\u5c06\u65e9\u5df2\u51c6\u5907\u597d\u7684\u53cd\u9988\u4fe1\u53f7\u53d1\u9001\u5230\u4e86\u672c\u5e94\u5b58\u5728\u5916\u8bbe\u53cd\u9988\u4fe1\u53f7\u7684\u603b\u7ebfdata\u4f4d\u7f6e\u4e0a\uff0c\u4ece\u800c\u8ba9CPU\u8bef\u8bfb\u4e86\u6211\u4eec\u63d0\u4f9b\u7684\u4fe1\u606f\u3002\u8d77\u5230\u4e86\u5077\u5929\u6362\u65e5\u7684\u6548\u679c\u3002<\/p>\n
\u5373\uff0c\u6211\u4eec\u4e00\u5f00\u59cb\u5b9a\u4e49\u5b9a\u4e49\u7684\u603b\u7ebf\u5730\u5740\u5176\u5b9e\u5747\u662f\u7a7a\u5730\u5740\uff0cCPU\u5bf9\u7a7a\u5730\u5740\u7684\u8bbf\u95ee\u65e0\u6cd5\u8d77\u5230\u4efb\u4f55\u6709\u6548\u56de\u5e94\uff0c\u800c\u5728\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u5c06\u81ea\u5df1\u7684\u6a21\u5757\u5077\u6362\u5230\u4e86\u76f8\u5e94\u7684\u4f4d\u7f6e\uff0c\u5728\u603b\u7ebf\u5730\u5740\u4e0a\u8868\u73b0\u51fa\u4e00\u4e2a\u6295\u5f71\uff0c\u4f7fCPU\u5c06\u5916\u90e8\u6a21\u5757\u89c6\u4e3a\u5b58\u5728\u4e8e\u603b\u7ebf\u221a<\/p>\n
\u4e60\u9898\u2b50<\/h5>\n
\u5728\u8001\u5e08\u7ed9\u51fa\u7684pout_seg\u6a21\u5757\u4e2d\uff0c\u662f\u57fa\u4e8e\u4ec0\u4e48\u6837\u7684\u903b\u8f91\u8bfb\u53d6\u4fe1\u606f\u7684<\/p>\n
\u63d0\u793a\uff1a\u540c\u524d\u6587\u7ed9\u51fa\u7684\u539f\u7406\u5b8c\u5168\u4e00\u81f4<\/p>\n
\u603b\u7ebf<\/h2>\n
\u867d\u7136\u524d\u9762\u8bf4\u5f97\u5929\u82b1\u4e71\u5760\uff0c\u4f46\u76f8\u4fe1\u7531\u4e8e\u540c\u5b66\u4eec\u5bf9\u603b\u7ebf\u7684\u7406\u89e3\u672a\u5fc5\u8db3\u591f\u6df1\u5165\u9042\u672a\u5fc5\u80fd\u8d77\u5230\u8f83\u597d\u7684\u89e3\u91ca\u6548\u679c\u3002\u8fd9\u91cc\u4e5f\u7ed3\u5408\u7b80\u6613\u7684\u603b\u7ebf\u6a21\u5757\u5728USTC\u6838\u4e0a\u7684\u8868\u73b0\uff0c\u4ec5\u5c31slaves\u901a\u9053\u6765\u505a\u4e00\u4e2a\u7b80\u5355\u7684\u8bf4\u660e\u3002<\/p>\n
\u5148\u505a\u4e00\u4e2a\u5c0f\u5b9a\u4e49<\/strong>\uff1a\u603b\u7ebf\u662f\u5c06\u50a8\u5b58\u5668\u4ee5\u53ca\u5404\u79cd\u529f\u80fd\u76f8\u5bf9\u72ec\u7acb\u7684I\/O\u63a5\u53e3\u7535\u8def\u4e0eCPU\u8fde\u63a5\u8d77\u6765\uff0c\u5b9e\u73b0\u5185\u90e8\u5404\u529f\u80fd\u6a21\u677f\u89c1\u4fe1\u606f\u7684\u4f20\u9001\uff0c\u4ee5\u6784\u6210\u529f\u80fd\u5b8c\u6574\u8ba1\u7b97\u673a\u7684\u5143\u7d20\u3002<\/p>\n
\u8ba1\u7b97\u673a\u7684\u64cd\u4f5c\u7cfb\u7edf\u7684\u4f4d\u6570\u901a\u5e38\u4e5f\u662f\u8868\u793a\u80fd\u7d22\u5f15\u603b\u7ebf\u7684\u5bbd\u5ea6\uff0c\u4e5f\u8868\u793a\u4e86\u80fd\u901a\u8fc7\u603b\u7ebf\u7d22\u5f15\u5185\u5b58\u7a7a\u95f4\u7684\u6700\u5927\u8303\u56f4\u3002\u537332\u4f4d\u64cd\u4f5c\u7cfb\u7edf\u6700\u591a\u80fd\u57282^32^\u5730\u5740\u8303\u56f4\u5185\u5bfb\u5740\uff0c\u7ed9\u51fa\u4e86\u6700\u9ad83.5G\u7684\u5185\u5b58\u4f7f\u7528\u8303\u56f4\uff0c\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u516d\u5341\u56db\u4f4d\u64cd\u4f5c\u7cfb\u7edf\u53ef\u4ee5\u7d22\u5f15\u7684\u8303\u56f4\u5df2\u7ecf\u662f\u4e2a\u5929\u6587\u6570\u5b57\u4e86\u3002<\/p>\n
\u7b80\u5355\u7684\u603b\u7ebf\u5c31\u76f8\u5f53\u4e8e\u4e00\u6761\u5bfc\u7ebf\u3002<\/p>\n
\u5728\u590d\u6742\u7684\u8ba1\u7b97\u673a\u7cfb\u7edf\u4e2d\uff0c\u603b\u7ebf\u88ab\u5206\u4e3a\u4e86\u5730\u5740\u603b\u7ebf\u3001\u6570\u636e\u603b\u7ebf\u548c\u63a7\u5236\u603b\u7ebf\u3002\u5176\u4e2d\u5730\u5740\u603b\u7ebf\u53cd\u6620\u4e86\u5730\u5740\u7d22\u5f15\u5173\u7cfb\uff0c\u6570\u636e\u603b\u7ebf\u8868\u73b0\u4e86\u6570\u636e\u4f20\u8f93\u5173\u7cfb\uff0c\u63a7\u5236\u603b\u7ebf\u8c03\u6574\u4e86\u8bbf\u95ee\u65f6\u5e8f\u5173\u7cfb\u3002\u800c\u5728USTC\u6838\u4e2d\uff0c\u901a\u8fc7\u4e00\u6761\u7b80\u6613\u603b\u7ebf\u540c\u65f6\u4f20\u8f93\u4e86\u4fe1\u606f\u3002\u5373rd_data,wr_data\u5bf9\u5e94\u6570\u636e\u603b\u7ebf\uff0crd_addr,wr_addr\u5bf9\u5e94\u5730\u5740\u603b\u7ebf\uff0crd_req,wr_req,rd_gnt,wr_gnt\u5bf9\u5e94\u63a7\u5236\u603b\u7ebf\uff0c\u5171\u540c\u8d77\u5230\u4e86\u786e\u4fdd\u6a21\u5757\u4e4b\u95f4\u6709\u6548\u4ea4\u6d41\u7684\u7528\u9014\u3002<\/p>\n
\u6709\u6a21\u5757\u5b9a\u4e49<\/p>\n
interface naive_bus();\n    \/\/ read interface\n    logic  rd_req, rd_gnt;\n    logic  [3:0]  rd_be;\n    logic  [31:0] rd_addr, rd_data;\n    \/\/ write interface\n    logic  wr_req, wr_gnt;\n    logic  [3:0]  wr_be;\n    logic  [31:0] wr_addr, wr_data;\n\n    modport master(\n        output rd_req, rd_be, rd_addr,\n        input  rd_data, rd_gnt,\n        output wr_req, wr_be, wr_addr, wr_data,\n        input  wr_gnt\n    );\n\n    modport slave(\n        input  rd_req, rd_be, rd_addr,\n        output rd_data, rd_gnt,\n        input  wr_req, wr_be, wr_addr, wr_data,\n        output wr_gnt\n    );\n\nendinterface<\/code><\/pre>\n
\u5176\u5b9e\u5176\u4e2d\u8fd8\u6709be\u7ebf\u8def\uff0c\u4f46\u8be5\u4fe1\u53f7\u662f\u603b\u7ebf\u547d\u4ee4\u548c\u5b57\u8282\u5141\u8bb8\u590d\u7528\u4fe1\u53f7\uff0c\u4e3b\u8981\u7531CPU\u5bfc\u5f15\uff0c\u9042\u4e8e\u6211\u4eec\u5e76\u6ca1\u6709\u4ec0\u4e48\u5b9e\u9645\u7684\u5173\u7cfb\uff0c\u4e0d\u4f7f\u7528\u4ea6\u4e0d\u63d0\u53ca<\/p>\n
\u603b\u7ebf\u5728SoC(system on chip)\u9876\u5c42\u7684\u5b9a\u4e49\u662f\u8fd9\u6837\u7684<\/p>\n
naive_bus  bus_masters[3]();\nnaive_bus  bus_slaves[5]();\n\n\/\/ \u4e3b\uff08\u8d8a\u9760\u524d\u4f18\u5148\u7ea7\u8d8a\u9ad8\uff09\uff1a\n\/\/   0. UART Debugger?\n\/\/   1. Core Data Master\n\/\/   2. Core Instruction  Master\n\/\/ \u4ece\uff1a\n\/\/   1. \u6307\u4ee4ROM  \u5730\u5740\u7a7a\u95f4 00000000~00000fff\n\/\/   2. \u6307\u4ee4RAM  \u5730\u5740\u7a7a\u95f4 00008000~00008fff\n\/\/   3. \u6570\u636eRAM  \u5730\u5740\u7a7a\u95f4 00010000~00010fff\n\/\/   4. \u663e\u5b58RAM  \u5730\u5740\u7a7a\u95f4 00020000~00020fff\n\/\/   5. \u7528\u6237UART \u5730\u5740\u7a7a\u95f4 00030000~00030003\nnaive_bus_router #(\n    .N_MASTER          ( 3 ),\n    .N_SLAVE           ( 5 ),\n    .SLAVES_MASK       ( {32'h0000_0003 , 32'h0000_0fff , 32'h0000_0fff , 32'h0000_0fff  , 32'h0000_0fff } ),\n    .SLAVES_BASE       ( {32'h0003_0000 , 32'h0002_0000 , 32'h0001_0000 , 32'h0000_8000  , 32'h0000_0000 } )\n) soc_bus_router_inst (\n    .clk               ( clk          ),\n    .rst_n             ( rst_n        ),\n    .masters           ( bus_masters  ),\n    .slaves            ( bus_slaves   )\n);<\/code><\/pre>\n
\u5176\u4e2d\u5b9a\u4e49\u6709\u4e24\u4e2a\u4e3b\u8981\u7684\u95ee\u9898\uff0c\u5373SLAVES_MASK\u548cSLAVES_BASE\u7684\u542b\u4e49\uff0c\u8fd9\u91cc\u7ed9\u51fa\u4e00\u4e2a\u89e3\u91ca\uff0cbase\u5bf9\u5e94\u7684\u662f\u7a7a\u95f4\u7684\u57fa\u5730\u5740\uff0c\u800cmask\u5206\u914d\u7a7a\u95f4\u5927\u5c0f\u6216\u957f\u5ea6\uff0c\u4ee5\u7528\u6237UART\u4e3a\u4f8b\uff0c32'h0003_0000\u8868\u793a\u7a7a\u95f4\u7684\u57fa\u5730\u5740\u4e3a0x00030000\uff0c32'h0000_0003\u8868\u793a\u5206\u914d\u7a7a\u95f4\u5927\u5c0f\u4e3a4\uff0c\u5373\u4ece0x00030000\u52300x00030003\u7684\u5730\u5740\u7a7a\u95f4\u5747\u4e3a\u7528\u6237UART\u6240\u6709\uff0c\u800c\u5f53\u6211\u4eec\u9700\u8981\u5728\u603b\u7ebf\u4e0a\u6dfb\u52a0\u4e00\u4e2a\u6a21\u5757\/\u5916\u8bbe\u65f6\uff0c\u53ea\u9700\u8981\u5c06\u524d\u90e8bus_slaves\u5b9a\u4e49\u5904\u7684slaves\u6570\u6307\u5b9a\u4e3a\u5f53\u524dslaves\u6570\uff0c\u5e76\u4e14\u5728\u7ebf\u8def\u8def\u7531router\u4e0a\u4e3a\u65b0\u589e\u7684\u603b\u7ebf\u5b9a\u4e49\u5730\u5740\u7a7a\u95f4\uff0c\u4ee5\u8001\u5e08\u7ed9\u51fa\u7684pout_seg\u4e3a\u4f8b\uff0c\u5728\u603b\u7ebf0x00031000\u52300x0003100f\u4e0a\u5206\u914d\u4e86\u5185\u5b58\u7a7a\u95f4\uff0c\u6709\u4fee\u6539<\/p>\n
naive_bus  bus_masters[3]();\nnaive_bus  bus_slaves[6]();\nnaive_bus_router #(\n    .N_MASTER          ( 3 ),\n    .N_SLAVE           ( 6 ),\n    .SLAVES_MASK       ( {32'h0000_000f , 32'h0000_0003 , 32'h0000_0fff , 32'h0000_0fff , 32'h0000_0fff  , 32'h0000_0fff } ),\n    .SLAVES_BASE       ( {32'h0003_1000 , 32'h0003_0000 , 32'h0002_0000 , 32'h0001_0000 , 32'h0000_8000  , 32'h0000_0000 } )\n) soc_bus_router_inst (\n    .clk               ( clk          ),\n    .rst_n             ( rst_n        ),\n    .masters           ( bus_masters  ),\n    .slaves            ( bus_slaves   )\n);<\/code><\/pre>\n
\u5728System Verilog\u4e2d\uff0cbus\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u7c7b\u578b\u76f4\u63a5\u5728\u6a21\u5757\u95f4\u4f20\u8f93\uff0c\u800cVerilog HDL\u76f8\u6bd4\u4e4b\u4e0b\u5c31\u6bd4\u8f83\u4e22\u4eba\u4e86\uff0c\u9700\u8981\u624b\u52a8\u5c06\u7c7b\u6865\u63a5\u5230\u7f51\u7ebf\u4e0a\u8fdb\u884c\u64cd\u4f5c\uff08\u5176\u5b9e\u6709\u53ef\u80fd\u662f\u56e0\u4e3a\u6211\u4eec\u8fd8\u4e0d\u77e5\u9053\u600e\u4e48\u5b9e\u73b0\uff09\u3002\u4f46\u603b\u4e4b\u5728\u9ec4\u8001\u5e08\u7ed9\u51fa\u7684\u4ee3\u7801\u4e2d\uff0c\u6709\u8fd9\u6837\u7684\u64cd\u4f5c<\/p>\n
logic        rd_req     ;\nlogic [31:0] rd_addr    ;\nlogic [31:0] rd_data    ;\nlogic        rd_gnt     ;\nlogic        wr_req     ;\nlogic [31:0] wr_addr    ;\nlogic [31:0] wr_data    ;\nlogic        wr_gnt     ;\n\nassign rd_req     =  bus_slaves[6].rd_req   ;\nassign rd_addr    =  bus_slaves[6].rd_addr  ;\nassign rd_data    =  bus_slaves[6].rd_data  ;\nassign rd_gnt     =  bus_slaves[6].rd_gnt   ;\nassign wr_req     =  bus_slaves[6].wr_req   ;\nassign wr_addr    =  bus_slaves[6].wr_addr  ;\nassign wr_data    =  bus_slaves[6].wr_data  ;\nassign wr_gnt     =  bus_slaves[6].wr_gnt   ;<\/code><\/pre>\n
\u8fd9\u6837\uff0c\u5c31\u5b8c\u6210\u4e86\u603b\u7ebf\u7684\u5b9a\u4e49\uff0c\u4e4b\u540e\u5c06\u5176\u7528\u4e8e\u4f8b\u5316\u7684\u8f93\u5165\u5373\u53ef<\/p>\n
\u6c47\u7f16\u4ee3\u7801\u903b\u8f91<\/h2>\n
\u5728\u8bb2\u5b8c\u5b9e\u73b0\u7684\u57fa\u672c\u539f\u7406\u4e4b\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6c47\u7f16\u7a0b\u5e8f\u6765\u89e3\u91ca\u5177\u4f53\u5982\u4f55\u5b9e\u73b0\u8fd9\u4e9b\u64cd\u4f5c<\/p>\n
\u8bfb\u53d6\u786c\u4ef6\u8f93\u5165<\/h3>\n
\u8fd9\u4e2a\u90e8\u5206\u662f\u548c\u786c\u4ef6\u8f93\u5165\u6a21\u5757\u76f8\u5339\u914d\u7684\u3002\u6211\u4eec\u4e4b\u524d\u8bf4\u8fc7\uff0c\u8ba9\u6570\u636e\u4f20\u5165CPU\u7684\u6761\u4ef6\u662fCPU\u5bf9\u6307\u5b9a\u5730\u5740\u8fdb\u884c\u4e86\u8bbf\u95ee\uff0c\u90a3\u4e48\u8981\u5982\u4f55\u505a\u5230\u8fd9\u4e00\u70b9\u5462\uff0c\u5176\u5b9e\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u8981\u8ba9CPU\u4ece\u5bf9\u5e94\u7684\u4f4d\u7f6eload\u8d44\u6e90\u5c31\u884c\u4e86\u3002\u53cd\u6620\u5728\u6c47\u7f16\u4ee3\u7801\u4e0a\u5c31\u662f\u8fd9\u6837<\/p>\n
.org 0x0\n    .global _start\n_start:\n    or      t0, zero, zero      #\u521d\u59cb\u5316t0\u5bc4\u5b58\u5668\uff08\u4e0b\u6587t\u5bc4\u5b58\u5668\u5747\u50a8\u5b58\u5730\u5740\uff09\n    lui     t0, 0x00032         #t0\u9ad8\u4f4d\u8d4b\u503c\uff0c\u5373\u5c06t0\u6307\u5411\u8f93\u5165\u603b\u7ebf\u57fa\u5730\u5740\n    or      s0, zero, zero      #\u521d\u59cb\u5316s0\u5bc4\u5b58\u5668\uff08\u4e0b\u6587s\u5bc4\u5b58\u5668\u5747\u50a8\u5b58\u53d8\u91cf\uff09\nloop:\n    lw      s0, (t0)            #\u5c06t0\u4f4d\u7f6e\u7684\u503c\u8bfb\u5165s0\u5bc4\u5b58\u5668\n    jal     zero, loop          #\u5faa\u73af\u5faa\u73af\u5faa\u73af%\u2026\u2026&\uff08\uffe5\u2026\u2026\uffe5%*&*\uffe5<\/code><\/pre>\n
\u5bf9\u7684\uff0c\u5c31\u662f\u8fd9\u4e48\u7b80\u5355\uff0c\u8fd9\u6837\u5c31\u80fd\u4e00\u76f4\u5c06\u8f93\u5165\u4fe1\u606f\u5728CPU\u4e2d\u7684\u5bc4\u5b58\u5668\u4e0a\u4fdd\u5b58\u4e86\uff01<\/p>\n
\u8c03\u8bd5trick<\/h3>\n
\u8c03\u8bd5\u8f93\u5165<\/h4>\n
\u4e3a\u4e86\u65b9\u4fbf\u8c03\u8bd5\uff0c\u6211\u4eec\u53ef\u4ee5\u8bd5\u7740\u4f7f\u7528UART\u7528\u6237\u7aef\u53e3\u5bf9\u7cfb\u7edf\u8fdb\u884c\u8c03\u8bd5\uff0c\u867d\u7136\u8bf4\u662f\u8c03\u8bd5\uff0c\u5176\u5b9e\u5c31\u662f\u5c06\u9700\u8981\u7684\u4fe1\u606f\u53d1\u9001\u5230\u5c4f\u5e55\u4e0a\uff0c\u524d\u9762\u6709\u5b9a\u4e49UART\u7aef\u53e3\u7684\u5730\u5740\u4e3a0x00030000<\/p>\n
.org 0x0\n    .global _start\n_start:\n    or      t0, zero, zero      #\u521d\u59cb\u5316t0\u5bc4\u5b58\u5668\n    lui     t0, 0x00032         #t0\u9ad8\u4f4d\u8d4b\u503c\uff0c\u5373\u5c06t0\u6307\u5411\u8f93\u5165\u603b\u7ebf\u57fa\u5730\u5740\n    or      s0, zero, zero      #\u521d\u59cb\u5316s0\u5bc4\u5b58\u5668\n    or      t1, zero, zero      #\u521d\u59cb\u5316t1\u5bc4\u5b58\u5668\n    lui     t1, 0x00030         #t1\u9ad8\u4f4d\u8d4b\u503c\uff0c\u5373\u5c06t1\u6307\u5411\u7528\u6237UART\u53d1\u9001\u53e3\nloop:\n    lw      s0, (t0)            #\u5c06t0\u4f4d\u7f6e\u7684\u503c\u8bfb\u5165s0\u5bc4\u5b58\u5668\n    sw      s0, (t1)            #\u5c06s0\u5bc4\u5b58\u5668\u7684\u4fe1\u606f\u5199\u5165UART\u53d1\u9001\u7aef\u53e3\n    jal     zero, loop          #\u5faa\u73af\u5faa\u73af\u5faa\u73af%\u2026\u2026&\uff08\uffe5\u2026\u2026\uffe5%*&*\uffe5<\/code><\/pre>\n
\u8fd9\u91cc\u7684sw\u6307\u4ee4\u8868\u793a\u7684\u662fstore\u50a8\u5b58\uff0c\u5373\u5c06\u5bc4\u5b58\u5668\u4e2d\u7684\u503c\u50a8\u5b58\u5230UART\u5730\u5740\uff0c\u8fd9\u91cc\u6709\u4e00\u70b9\u53ef\u4ee5\u6ce8\u610f\u7684\uff0c\u5373UART\u7aef\u53e3\u5730\u5740\u7684\u9996\u4f4d\u4e3a\u53d1\u9001\u4f4d\uff0c\u5f53\u4f60\u5411\u8be5\u4f4d\u7f6e\u5199\u5165\u4fe1\u606f\u65f6\uff0cUART\u4f1a\u81ea\u52a8\u5c06\u4fe1\u606f\u4eceUART\u8f93\u51fa\uff0c\u5373\u6253\u5370\u5230\u4e86\u6211\u4eec\u7684\u5c4f\u5e55\u4e0a<\/p>\n
\u8c03\u8bd5\u8f93\u51fa<\/h4>\n
\u5f53\u540c\u65f6\u8fdb\u884c\u8f93\u5165\u548c\u8f93\u51fa\u8c03\u8bd5\u7684\u65f6\u5019\uff0c\u603b\u662f\u4f1a\u9047\u5230\u4e00\u4e9b\u4e0d\u53ef\u9884\u89c1\u6027\u7684bug\uff0c\u8fd9\u65f6\u6211\u4eec\u5176\u5b9e\u4e0d\u5fc5\u8fc7\u5ea6\u4f9d\u8d56\u81ea\u5df1\u7684\u667a\u529b\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u4f7f\u7528\u5de5\u5177\uff0c\u6709USTC-RVSoC-master \\ tools \\ UartSession.exe\u8fd9\u4e2a\u5de5\u5177\uff0c\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u4e32\u53e3\u5411CPU\u901a\u4fe1\uff08\u53ef\u4ee5\u6ce8\u610f\u5230UART\u662f\u9c9c\u6709\u7684\u8fde\u6709master\u603b\u7ebf\u7684\u6a21\u5757\uff09\uff0c\u4f7fCPU\u76f4\u63a5\u5411\u5730\u5740\u8fdb\u884c\u5199\u5165\uff0c\u6709\u76f4\u63a5\u8f93\u5165<\/p>\n
$ 0\n$ 0x00031000 0x666<\/code><\/pre>\n
\u53ef\u4ee5\u4f7f\u9ed8\u8ba4\u7684\u8ba1\u6570\u5668\u5f53\u573a\u7f6e666<\/p>\n
$\u662f\u63a7\u5236\u53f0\u547d\u4ee4\u7684\u6807\u51c6\u524d\u7f00\uff0c\u4e0d\u9700\u8981\u8f93\u5165<\/em><\/p>\n
\u4ee5\u53ca\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5f53\u8fd9\u4e2a\u5de5\u5177\u5360\u7528\u7740\u7aef\u53e3\u65f6\uff0c\u662f\u65e0\u6cd5\u8fdb\u884c\u70e7\u5199\u7684\uff0c\u8bf7\u53ca\u65f6\u9000\u51fa<\/p>\n
\u8ba9\u5916\u8bbe\u8bfb\u53d6CPU\u7684\u8f93\u51fa\uff1f<\/h3>\n
\u8fd9\u4e00\u6b65\u5176\u5b9e\u8ddf\u8ba9\u8bfb\u53d6\u786c\u4ef6\u8f93\u5165\u4e00\u6837\u7b80\u5355\uff0c\u5373\u53ea\u9700\u8981\u628a\u5916\u8bbeVerilog\u4e2d\u7684cell_wr_addr\u4e0e\u57fa\u5730\u5740\u548c\u6c47\u7f16\u4e2d\u7684\u5bc4\u5b58\u5668\u5730\u5740\u5bf9\u4e0a\uff0c\u7136\u540e\u5411\u5730\u5740\u4e2d\u5199\u5165\u6570\u636e\u5373\u53ef<\/p>\n
module pout_seg (\n    input  clk, \n    input  rst_n,\n    output [7:0]  SEL,\n    output [7:0]  DIG,   \n\n    output wr_req,       \n    output [31:0] wr_addr,    \n    output [31:0] wr_data,    \n    input  wr_gnt  \n);\nreg [31:0] seg_data;\n\nwire [31:0] cell_wr_addr;\nwire [31:0] wdata;\n\nassign wr_gnt = wr_req;\nassign cell_wr_addr = wr_addr[31:2];\nassign wdata = wr_data;\n\nalways @ (posedge clk or negedge rst_n)\n    if(~rst_n)\n        seg_data <= 0;\n    else if(wr_req && cell_wr_addr == 0)\n        seg_data <= wdata;\n\nseg seg0(\n            .clk           (clk     ),\n            .seg_data      (seg_data),\n            .DIG           (DIG     ),\n            .SEL           (SEL     )\n    );\n\nendmodule<\/code><\/pre>\n
\u53ef\u4ee5\u76f4\u63a5\u8fd9\u6837\u5b50\u221a<\/p>\n
.org 0x0\n    .global _start\n_start:\n    or      t0, zero, zero      #\u521d\u59cb\u5316t0\u5bc4\u5b58\u5668\n    lui     t0, 0x00032         #t0\u9ad8\u4f4d\u8d4b\u503c\uff0c\u5373\u5c06t0\u6307\u5411\u8f93\u5165\u603b\u7ebf\u57fa\u5730\u5740\n    or      s0, zero, zero      #\u521d\u59cb\u5316s0\u5bc4\u5b58\u5668\n    or      t1, zero, zero      #\u521d\u59cb\u5316t1\u5bc4\u5b58\u5668\n    lui     t1, 0x00031         #t1\u9ad8\u4f4d\u8d4b\u503c\uff0c\u5373\u5c06t1\u6307\u5411\u8f93\u51fa\u603b\u7ebf\u57fa\u5730\u5740\nloop:\n    lw      s0, (t0)            #\u5c06t0\u4f4d\u7f6e\u7684\u503c\u8bfb\u5165s0\u5bc4\u5b58\u5668\n    sw      s0, (t1)            #\u5c06s0\u5bc4\u5b58\u5668\u7684\u4fe1\u606f\u4f20\u7ed9\u8f93\u51fa\u6a21\u5757\n    jal     zero, loop          #\u5faa\u73af\u5faa\u73af\u5faa\u73af%\u2026\u2026&\uff08\uffe5\u2026\u2026\uffe5%*&*\uffe5<\/code><\/pre>\n
\u800c\u5f53\u6211\u4eec\u9700\u8981\u5728\u76f8\u8f83\u57fa\u5730\u5740\u504f\u79fb\u7684\u4f4d\u7f6e\u4e0a\u8bbf\u95ee\u65f6\uff0c\u53ef\u4ee5\u8fd9\u6837\u64cd\u4f5c\uff0c\u4fee\u6539<\/p>\n
cell_wr_addr == \/*\u504f\u79fb*\/\n\naddi    t1,{\u504f\u79fb\u6570}<\/code><\/pre>\n
\u8fd9\u6837\u5c31\u80fd\u6210\u529f\u8fdb\u884c\u6570\u636e\u4ea4\u4e92\u4e86<\/p>\n
\u5176\u5b9e\u5185\u7f6e\u7684VGA\u663e\u793a\u6a21\u5757\u7ec4\u7ec7\u5f62\u5f0f\u5c31\u4e0e\u4e4b\u975e\u5e38\u76f8\u8fd1\uff0c\u6709\u6bcf\u4e2a\u5b57\u7b26\u4e3a8*16\u70b9\u9635\uff0c\u4e00\u4e2a\u5730\u5740\u50a8\u5b58\u4e00\u4e2a\u5b57\u7b26\u3002\u6a21\u5757\u5728\u8f93\u51fa\u65f6\u9010\u884c\u8fdb\u884c\u626b\u63cf\uff0c\u6709\u5730\u5740\u76f8\u8f83\u9996\u5730\u5740\u504f\u79fb\u7684\u540c\u65f6\uff0c\u8bfb\u53d6\u4f4d\u7f6e\u4e5f\u76f8\u8f83\u57fa\u5730\u5740\u504f\u79fb\u3002<\/p>\n
\u4e00\u4e9b\u5e38\u7528\u7f16\u7a0b\u601d\u8def\u7684\u5b9e\u73b0<\/h3>\n
\u5206\u652f<\/h5>\n
\u5206\u652f\u5728\u6c47\u7f16\u8bed\u8a00\u4e2d\u4e3b\u8981\u7684\u5b9e\u73b0\u65b9\u6cd5\u662f\u901a\u8fc7bne\u548cbeq\u6307\u4ee4\uff0c\u8fd9\u4e24\u4e2a\u6307\u4ee4\u90fd\u662f\u8df3\u8f6c\u7c7b\u578b\u7684\uff0c\u5904\u7406\u4e24\u4e2a\u5bc4\u5b58\u5668\u7684\u503c\uff0c\u5e76\u8fdb\u884c\u5224\u65ad\uff0c\u6839\u636e\u5224\u65ad\u7ed3\u679c\u8fdb\u884c\u8df3\u8f6c\uff0c\u6709\u53c2\u6570\u8868<\/p>\n
bne\/beq     \u5bc4\u5b58\u56681,\u5bc4\u5b58\u56682,\u8df3\u8f6c\u8bed\u53e5\u5757<\/p>\n
\u5176\u4e2dne\u4e3anot equal\uff0c\u81f3\u4e8eeq\u662f\u5565\u5c31\u663e\u800c\u6613\u89c1\u4e86\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2a\u6307\u4ee4\u6765\u5b8c\u6210C\u8bed\u8a00\u4e2d\u7684if\u3001case\u7b49\u8bed\u53e5\uff0c\u4f8b\u5982<\/p>\n
if ( wtf == cpu )\n    {fuck eda;}\nelse\n    {fuck my life;}\n\/\/***\nswitch(wtf)\n    case cpu:\n        fuck eda;\n    case hjy:\n        wehhz,wehnb;<\/code><\/pre>\n
\u53ef\u4ee5\u7b49\u4ef7\u4e8e<\/p>\n
fuck_eda:\nfml:\na_simple_case:\n    beq s0,s1,fuck_eda\n    bne s0,s1,fml<\/code><\/pre>\n
\u4ec5\u4ec5\u4f5c\u4e3a\u793a\u8303x<\/p>\n
\u53e6\u5916\u6709BLT,BGE\u5206\u522b\u8868\u793a\uff1c\u548c\u2265\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u4f7f\u7528<\/p>\n
\u5faa\u73af<\/h5>\n
\u6b64\u5916\u8fd8\u6709while(1)\u548cfor\u8bed\u53e5\u6b64\u7c7b\u5728\u5355\u7247\u673a\u7f16\u7a0b\u4e2d\u5e38\u7528\u7684\u8bed\u53e5\uff0c\u53ef\u4ee5\u8fd9\u6837\u7528\u6c47\u7f16\u8868\u793a<\/p>\n
while:\n    # do\n    jal     zero, while         #\u8df3\u8f6c\u56de\u81ea\u5df1\uff0c\u65e0\u9650\u5faa\u73af\n#########################\ncnt_init:\n    lui     s0, 0x1             #\u8ba1\u6570\u5668\u521d\u59cb\u8d4b\u503c\uff0c\u8981\u5728\u5faa\u73af\u4f53\u5916\u90e8\nfor:\n    addi    s0, s0, -1          #\u8ba1\u6570\u5668\u81ea\u51cf\n    # do\n    bne     s0, zero, for       #\u6761\u4ef6\u5faa\u73af<\/code><\/pre>\n
\u6b64\u5904jal\u8868\u793a\u65e0\u6761\u4ef6\u8df3\u8f6c<\/p>\n
\u6c47\u7f16\u5c0f\u603b\u7ed3\u4e0e\u5176\u5b83trick<\/h3>\n
\u8fd9\u6837\u770b\u8d77\u6765\uff0c\u4e00\u5207\u662f\u4e0d\u662f\u90fd\u548c\u6211\u4eec\u719f\u6089\u7684\u7a0b\u5e8f\u4e16\u754c\u6302\u4e0a\u94a9\u4e86\u5462\uff1f<\/p>\n
\u800c\u5927\u5bb6\u5176\u5b9e\u8981\u505a\u7684\u5c31\u662f\u4e0d\u65ad\u901a\u8fc7\u7ec4\u7ec7\u8fd9\u4e9b\u903b\u8f91\u6765\u901a\u8fc7\u6c47\u7f16\u6307\u4ee4\u64cd\u7eb5CPU\u548c\u5916\u8bbe\u4e2d\u7684\u6570\u636e\uff0c\u4ece\u800c\u8fbe\u5230\u81ea\u5df1\u9700\u8981\u7684\u8f93\u51fa\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u4e0e\u6309\u94ae\u6253\u5b57\u6a21\u5757\u914d\u5957\u7684\u6c47\u7f16\u4ee3\u7801\uff0c\u867d\u7136\u5b8c\u6210\u5ea6\u6781\u4f4e\u5f53\u8fd8\u662f\u53ef\u4ee5\u6446\u51fa\u6765\u4f5c\u4e3a\u53c2\u8003\u7684<\/p>\n
.org 0x0\n    .global _start\n_start:\n    or    t0, zero,zero\n    lui   t0, 0x00020           #\u8bbe\u7f6et0\u4e3a\u663e\u5b58\u4f4d\u7f6e\uff0cvga\u81ea\u52a8\u6253\u5370\u663e\u5b58\u6570\u636e\n    or    t1, zero,zero\n    lui   t1, 0x00032           #\u8bbe\u7f6et1\u4e3a\u6309\u94ae\u8f93\u5165\u4f4d\u7f6e\n    or    s0, zero,zero         \n    lb    s0, (t1)              #\u8bfb\u5165\u6309\u94ae\u9ed8\u8ba4\u72b6\u6001\u503c\ncnt_init:\n    lui   s1, 0x000f0           #\u8ba1\u6570\u5668s1\u8d4b\u521d\u503c\uff0c\u7528\u4e8e\u5ef6\u65f6\u9632\u6b62\u8f93\u51fa\u8fc7\u5feb\nloop:\n    addi  s1, s1, -1            #\u8ba1\u6570\u5668\u81ea\u51cf\n    bne   t2, zero, loop        #\u8ba1\u6570\u5668\u975e\u96f6\u65f6\u6301\u7eed\u81ea\u51cf\uff0c\u4ec50\u65f6\u6267\u884c\u540e\u7eed\n    or    s2, zero,zero                 \n    lb    s2, (t1)              #\u6309\u952e\u8f93\u5165\u8bfb\u5165s2\n    beq   s2, s0, cnt_init      #\u5224\u65ad\u8f93\u5165\u662f\u5426\u4e3a\u7a33\u6001\u65f6\u8f93\u5165\uff0c\u662f\u5219\u8df3\u8fc7\n    addi  s2, s2, 0x041         #\u8f93\u5165\u6570\u636e\u52a0\u5230\u6709ASCII\u7801\u7684\u8303\u56f4\u65b9\u4fbf\u663e\u793a\n    sb    s2, (t0)              #\u5c06\u663e\u793a\u6570\u636e\u5199\u5165\u663e\u5b58\n    addi  t0, t0, 0x001         #\u663e\u5b58\u8fdb\u4f4d\uff0c\u987a\u5e8f\u8f93\u5165<\/code><\/pre>\n
\u8fd9\u4ec5\u4ec5\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u987a\u5e8f\u6253\u5370\uff0c\u901a\u8fc7\u66f4\u591a\u590d\u6742\u7684\u903b\u8f91\uff0c\u6bd4\u5982\u8bf4\u5c06\u663e\u5b58\u8fdb\u4f4d128\u53ef\u4ee5\u8fbe\u5230\u5411\u4e0b\u4e00\u884c\u8f93\u51fa\u7684\u6548\u679c\uff0c\u4ee5\u53ca\u901a\u8fc7\u6a21\u5757\u7684\u62c6\u5206\u53ef\u4ee5\u8fbe\u5230\u4ec5\u5728\u663e\u793a\u5668\u4e0a\u79fb\u52a8\u5149\u6807\u800c\u4e0d\u76f4\u63a5\u8fdb\u884c\u5199\u5165\uff0c\u8fd9\u6837\u590d\u6742\u5408\u6210\u4fbf\u80fd\u8d77\u5230\u63a7\u5236\u5b57\u7b26\u79fb\u52a8\u3001\u63a7\u5236\u753b\u7b14\u3001\u65f6\u5e8f\u663e\u793a\u7b49\u7b49\u7b49\u529f\u80fd\uff0c\u5176\u5b9e\u90fd\u662f\u5728\u5730\u5740\u548c\u6570\u636e\u64cd\u7eb5\u4e0a\u7684\u5c0f\u5c0f\u53d8\u5316\uff0c\u5728\u7ed9\u5b9aVGA\u8f93\u51fa\u6a21\u5757\u7684\u524d\u63d0\u4e0b\u663e\u5f97\u6781\u4e3a\u7b80\u5355\u4e86\uff0c\u975e\u5e38\u6709\u8da3\u7684\u662f\u738b\u6770\u8f89\u540c\u5b66\u7684\u5171\u4eab\uff0c\u901a\u8fc7\u81ea\u5df1\u751f\u6210\u70b9\u9635\u7be1\u6539\u539f\u6709ascii\u5bf9\u5e94\u4fe1\u606f\uff0c\u4ece\u800c\u4f7f\u5f97\u56fe\u7247\u7b49\u590d\u6742\u8f93\u51fa\u90fd\u6210\u4e3a\u4e86\u53ef\u80fd\uff0c\u5728\u8fd9\u4e2a\u57fa\u7840\u4e0a\u53ef\u4ee5\u53d1\u6325\u51fa\u7684\u521b\u610f\u6709\u592a\u591a\u4e86\u3002<\/p>\n
\u6700\u540e\u603b\u7ed3<\/h2>\n
\u8fd9\u6b21\u7684\u4f5c\u4e1a\u867d\u7136\u542c\u8d77\u6765\u7a0d\u663e\u6050\u6016\uff0c\u4f46\u5176\u5b9e\u662f\u975e\u5e38\u7b80\u5355\u6709\u8da3\u4e14\u8ba9\u4eba\u6536\u83b7\u9887\u4e30\u7684\u4e00\u6b21\u5b9e\u8df5\u3002\u96be\u70b9\u4e5f\u53ea\u6709\u60f3\u4e00\u60f3\u81ea\u5df1\u60f3\u505a\u4ec0\u4e48\uff0c\u673a\u5668\u80fd\u505a\u4ec0\u4e48\uff0c\u6211\u8be5\u600e\u4e48\u8ba9\u673a\u5668\u53bb\u505a\u3002\u4e00\u65e6\u60f3\u901a\u4e86\uff0c\u5176\u5b9e\u4e00\u5207\u82e6\u96be\u90fd\u80fd\u8fce\u5203\u800c\u89e3\u3002\u73b0\u5728\u6709\u591a\u6570\u540c\u5b66\u53ef\u80fd\u90fd\u8fd8\u5728\u7126\u8651\u4e4b\u4e2d\uff0c\u5bb3\u6015\u81ea\u5df1\u96be\u4ee5\u5b8c\u6210\u8fd9\u9879\u4f5c\u4e1a\u800c\u88ab\u8feb\u9762\u4e34\u64cd\u4f5c\u8003\u8bd5\uff0c\u4f46\u8fd8\u8bf7\u52a1\u5fc5\u597d\u597d\u4eab\u53d7\u5b66\u4e60\u7684\u8fc7\u7a0b\u3002\u51fa\u4e8e\u5404\u79cd\u610f\u4e49\uff0c\u6211\u8fd8\u662f\u5e0c\u671b\u6211\u7684\u55d3\u5b50\u80fd\u7528\u5728\u4e3a\u4ec0\u4e48\u7684\u8ba8\u8bba\u4e0a\uff0c\u800c\u4e0d\u662f\u600e\u4e48\u529e\u7684\u89e3\u91ca\u4e0a\u3002\u56e0\u4e3a\u524d\u8005\u80fd\u5de9\u56fa\u6211\u7684\u77e5\u8bc6\u4fc3\u8fdb\u6211\u7684\u7406\u89e3\uff0c\u800c\u540e\u8005\u53ea\u4f1a\u8ba9\u6211\u53d1\u51fa\u4e3a\u5565\u81ea\u5df1\u8fd9\u4e5f\u8bf4\u4e0d\u6e05\u695a\u7684\u60b2\u9e23\uff08\u8349<\/p>\n
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