{"id":1511,"date":"2024-05-16T19:13:35","date_gmt":"2024-05-16T11:13:35","guid":{"rendered":"https:\/\/www.yizishun.com\/?p=1511"},"modified":"2024-05-25T09:38:15","modified_gmt":"2024-05-25T01:38:15","slug":"%e6%80%bb%e7%ba%bf-2","status":"publish","type":"post","link":"https:\/\/www.yizishun.com\/?p=1511","title":{"rendered":"\u603b\u7ebf"},"content":{"rendered":"\n

\u7533\u660e\uff1a\u4ee5\u4e0b\u7684\u6587\u5b57\u5e76\u4e0d\u662f\u6559\u5404\u4f4d\u4ec0\u4e48\u662f\u603b\u7ebf\u6216\u8005\u600e\u4e48\u505aysyx\u603b\u7ebf\u7684\u7ae0\u8282\uff0c\u8fd9\u4ec5\u4ec5\u662f\u6211\u505a\u603b\u7ebf\u7ae0\u8282\u5199\u7684\u4e00\u4e9b\u7b14\u8bb0\u5427\uff0c\u6216\u8005\u8e29\u7684bug\uff0c\u6587\u5b57\u53ef\u80fd\u4f1a\u6709\u4e9b\u8df3\u8dc3\u63a5\u4e0d\u4e0a\uff0c\u8bf7\u89c1\u8c05\u3002\u82e5\u6709\u95ee\u9898\uff0c\u53ef\u76f4\u63a5\u4e0e\u6211\u8054\u7cfb<\/mark><\/p>\n\n\n\n

\u5728\u5199\u603b\u7ebf\u7684\u7b2c\u4e00\u4e2a\u4efb\u52a1\uff0c\u91cd\u6784NPC\u65f6\uff0c\u6211\u5148\u540e\u8fdb\u884c\u4e86\uff0cverilog\u7248NPC\u91cd\u6784\uff0c\u5b66\u4e60chisel\uff0c\u7528chisel\u5199\u4e86\u4e00\u7248NPC-chisel\u5e76\u63a5\u5165\u4eff\u771f\u73af\u5883\u5e76\u4e14\u6210\u529f\u8fd0\u884crt-thread\uff0c\u4e0a\u9762\u8fd9\u4e24\u4e2a\u82b1\u4e86\u6211\u8fd1\u4e00\u4e2a\u6708\u7684\u65f6\u95f4\uff08\u5176\u5b9e\u4e2d\u95f4\u8fd8\u6709\u5176\u4ed6\u4e8b\u60c5\u803d\u6401\u4e86\uff0c\u4e0d\u8fc7\u4efb\u52a1\u91cf\u786e\u5b9e\u633a\u5927\u7684\uff09\uff0c\u4f46\u662f\uff0c\u8fd9\u8fd8\u4e0d\u591f\ud83d\ude2d\ud83d\ude2d\uff0c\u6211\u8fd8\u9700\u8981\u5c06npc-chisel\u6539\u6210\u652f\u6301\u6a21\u5757\u95f4\u7684\u901a\u4fe1\u534f\u8bae\u7684\u7248\u672c<\/p>\n\n\n\n

\u603b\u7ebf\u5f02\u6b65\u901a\u4fe1\u534f\u8bae<\/mark><\/strong><\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u8fd9\u4e2a\u6211\u7406\u89e3\u4e86\u633a\u4e45\u7684…..\u611f\u89c9\u786e\u5b9e\u633a\u96be\u7406\u89e3\u7684\u7684\uff0c\u4f46\u662f\u6211\u5ffd\u7136\u60f3\u5230\u4e86\u4e00\u4e2a\u975e\u5e38\u4e0d\u9519\u7684\u7406\u89e3\u529e\u6cd5\uff0c\u8fd9\u4e2a\u529e\u6cd5\u5982\u679c\u6b63\u786e\u7684\u8bdd\uff0c\u6211\u4e2a\u4eba\u8ba4\u4e3a\u6bd4\u8bb2\u4e49\u6216\u8005\u300acpu\u8bbe\u8ba1\u5b9e\u6218\u300b\u5173\u4e8e\u8fd9\u4e00\u5757\u7684\u7406\u89e3\u65b9\u6cd5\u66f4\u52a0\u901a\u4fd7\u6613\u61c2\uff0c\u4f46\u662f\u6211\u95ee\u7fa4\u91cc\u7684\u5404\u4f4d\u5927\u4f6c\uff0c\u5927\u4f6c\u4eec\u90fd\u8ba9\u6211\u5148\u5199\uff0c\u786e\u5b9e\u9700\u8981\u201c\u5148\u5b9e\u73b0\u540e\u5b8c\u7f8e\u201d\u7684\u601d\u60f3\uff0c\u4e0d\u7136\u6839\u672c\u4e0d\u6562\u52a8\u624b\uff0c\u6211\u7684\u7406\u89e3\u7684\u4f2a\u4ee3\u7801\u5982\u4e0b<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u5199\u4e86\u4e00\u4e0b\u4f3c\u4e4e\u662f\u5bf9\u7684\uff0c\u4f46\u662f\u591a\u5468\u671f\u548c\u5355\u5468\u671f\u53c8\u4e00\u4e9b\u4e1c\u897f\u5f88\u4e0d\u4e00\u6837\uff0c\u5e76\u4e14\u6211\u8fd9\u4e2astate\u7684\u8f6c\u5316\u662f\u5728\u4e0b\u4e00\u4e2a\u5468\u671f\u5199\u5165\u7684\uff0c\u4e5f\u5c31\u662f\u5f53fire\u7684\u65f6\u5019state\u5e76\u6ca1\u6709\u6539\u53d8\uff0cstate\u7684\u5199\u5165\u662f\u5728\u4e0b\u4e00\u4e2a\u5468\u671f\uff0c\u4e5f\u5c31\u662f\u4e0b\u4e00\u4e2a\u5468\u671f\u624d\u5f00\u59cb\u5de5\u4f5c\uff0c\u8fd9\u4e2a\u662f\u4e0d\u662f\u5bf9\u7684\uff1f\u5e76\u4e14\u6709\u4e00\u4e9b\u5199\u5165\u7684\u64cd\u4f5c\u5199\u5165\u4e5f\u662f\u5728\u4e0b\u4e00\u5468\u671f\uff0c\u8fd9\u5728\u5355\u5468\u671f\u662f\u6ca1\u4ec0\u4e48\u95ee\u9898\u7684\uff0c\u4f46\u662f\u591a\u5468\u671f\u53ef\u80fd\u51fa\u73b0\u4e0b\u4e00\u5468\u671f\u65f6\u5199\u5165\u7684\u6570\u636e\u53d1\u751f\u53d8\u5316<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u770b\u6b64\u56fe\uff0c\u540e\u9762\u76845\u4e2astate\u662f\u4e94\u9636\u6bb5\u7684state\uff0c\u7b2c\u4e00\u4e2astate\u5360\u4e24\u4e2a\u5468\u671f\uff0c\u539f\u56e0\u662fIFU\u8bbf\u95eesram\u9700\u8981\u5ef6\u8fdf\u4e00\u5468\u671f\u83b7\u5f97\u6570\u636e\uff0c\u6240\u4ee5\u4e00\u6761\u6307\u4ee4\u9700\u89816\u4e2a\u5468\u671f\uff0c\u4f46\u662f\u5176\u5b9e\u8fd8\u662f\u6709\u70b9\u95ee\u9898<\/p>\n\n\n\n

\u6307\u4ee4\u5728\u7b2c\u4e8c\u4e2a\u5468\u671f\u53d6\u5230\uff0c\u7406\u5e94\u5f53\u6b64\u65f6\u5c31\u5df2\u7ecfIFU\u548cIDU Fire\u4e86\uff0c\u4f46\u662f\u7531\u4e8e\u65f6\u5e8f\u903b\u8f91\u7b2c\u4e09\u5468\u671fIDU\u7684\u72b6\u6001\u624d\u4f1a\u6539\u53d8\uff0c\u5728\u7b2c\u4e09\u5468\u671fIDU\u548cEXU\u5c31\u5e94\u8be5\u5df2\u7ecfFire\u4e86\uff0c\u4f46\u662f\u5728\u7b2c\u56db\u5468\u671fEXU\u7684\u72b6\u6001\u624d\u4f1a\u6539\u53d8….<\/p>\n\n\n\n

\u6211\u4e0d\u77e5\u9053\u591a\u5468\u671f\u662f\u4e0d\u662f\u5c31\u662f\u8fd9\u6837\u7684\uff0c\u6211\u611f\u89c9\u597d\u50cf\u662f\u5bf9\u7684\uff0c\u90a3\u5c31\u8fd9\u6837\u5427\uff0c\u6211\u611f\u89c9\u5176\u5b9e\u633a\u5b8c\u7f8e\u7684\uff08\u597d\u7d2f<\/p>\n\n\n\n

\u4f46\u662f\u8bb2\u4e49\u4e0a\u7684\u610f\u601d\u4f3c\u4e4e\u662f\u8ba9\u6211\u4e24\u5468\u671f\u89e3\u51b3….\u6211\u89c9\u5f97\u8981\u6539\u591a\u5468\u671f\u5c31\u4e00\u53e3\u6c14\u6539\u4e86\u5427\uff0c\u8fd9\u79cd\u65e2\u662f\u591a\u5468\u671f\u4f46\u662f\u53c8\u6ca1\u6539\u5e72\u51c0\u7684\u611f\u89c9\u5f88\u5947\u602a<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u7b2c\u4e8c\u4e2a\u4efb\u52a1\uff0c\u6211\u611f\u89c9\u8ddf\u7b2c\u4e00\u4e2a\u6ca1\u5565\u533a\u522b\uff0c\u4f46\u662f\u6211\u7684\u591a\u5468\u671f\u5904\u7406\u5668\u53ef\u80fd\u9700\u89817\u5468\u671f\u89e3\u51b3load\u6307\u4ee4\uff0c\u5e76\u4e14\u5728\u4e0d\u662fload\u6307\u4ee4\u65f6\u53ea\u9700\u89816\u5468\u671f\uff0c\u540e\u53d1\u73b0store\u6307\u4ee4\u4e5f\u9700\u89817\u5468\u671f\uff0c\u554a\u554a\u554a\u554a\uff0c\u6ca1\u60f3\u5230\u56f0\u4f4f\u6211\u7684\u7adf\u7136\u662f\u5982\u4f55\u6a21\u62df\u51fa\u8bbf\u5b58\u5ef6\u8fdf\uff0c\u4f46\u662f\u6211\u63e1\u624b\u4fe1\u53f7\u5e94\u8be5\u90fd\u662f\u6ca1\u5565\u95ee\u9898\u4e86<\/p>\n\n\n\n

AXI-Lite<\/mark><\/strong><\/h2>\n\n\n\n

axi-lite\u611f\u89c9\u6bd4\u4e4b\u524d\u591a\u4e86\u5f88\u591a\u4fe1\u53f7\uff0c\u8fd9\u6700\u4e3b\u8981\u7684\u539f\u56e0\u5c31\u662f\u771f\u5b9e\u7684\u5185\u5b58\u8bbf\u95ee\u7684\u60c5\u51b5\u662f\u591a\u53d8\u7684\uff0c\u4e3a\u4e86\u5e94\u5bf9\u591a\u53d8\u7684\u60c5\u51b5\uff0c\u8bbe\u7f6e\u4e86\u5f88\u591a\u63e1\u624b\u4fe1\u53f7 <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u5728RTFM\u4e4b\u524d\u7684\u4e00\u4e9b\u60f3\u6cd5<\/mark><\/strong>\uff1a\u5f88\u4e0d\u80fd\u7406\u89e3\u4e3a\u4ec0\u4e48\u4f1a\u51fa\u73b0\u6b7b\u9501\u6216\u8005\u6d3b\u9501\u7684\u60c5\u51b5\uff0cready\u6216\u8005valid\u4fe1\u53f7\u96be\u9053\u4e0d\u662f\u5b8c\u5168\u53d6\u51b3\u4e8e\u81ea\u5df1\u8fd9\u4e2a\u6a21\u5757\u7684\u72b6\u6001\u5417\uff0cmaster\u5b8c\u6210\u5de5\u4f5c\u8bbe\u7f6evalid\u4fe1\u53f7\uff0cslave\u5728\u53ef\u4ee5\u63a5\u53d7\u65f6\u8bbe\u7f6eready\u4fe1\u53f7\uff0c\u8fd9\u4e24\u4e2a\u4fe1\u53f7\u4e4b\u95f4\u4e3a\u4ec0\u4e48\u4f1a\u6709\u4f9d\u8d56\u5462\uff1f\u4e0d\u7406\u89e3<\/p>\n\n\n\n

RTFM\u65f6\u7684\u7b14\u8bb0<\/mark><\/strong>\uff1a<\/p>\n\n\n\n

\uff08\u56e0\u4e3a\u627e\u4e0d\u5230\u8fd9\u4e9b\u7ea6\u675f\u5177\u4f53\u5728\u54ea\u91cc\uff0c\u6211\u5fc5\u987b\u5b8c\u6574\u7684\u8bfb\u67d0\u4e9b\u53ef\u80fd\u51fa\u73b0\u7684\u7ae0\u8282\uff0c\u8bfb\u90fd\u8bfb\u4e86\uff0c\u5c31\u8bb0\u70b9\u7b14\u8bb0\u5427\uff09<\/p>\n\n\n\n

1.clock\uff1a\u8bf4valid ready\u4fe1\u53f7\u5fc5\u987b\u8981\u53d7\u5230clock\u7684\u7ea6\u675f\uff0c\u4e0d\u662f\u5f88\u80fd\u7406\u89e3<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

2.reset\uff1a\u89c4\u5b9a\u4e86\u6240\u6709valid\u4fe1\u53f7\u5fc5\u987b\u4e3a0\uff0c\u5141\u8bb8\u5f02\u6b65\u590d\u4f4d\uff0c\u5e76\u4e14valid\u7684\u53d8\u5316\u5fc5\u987b\u5728reset\u53d8\u5316\u7684\u540e\u4e00\u4e2arising edge<\/p>\n\n\n\n

3.valid ready information\u7684\u5173\u7cfb<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u4e0d\u5999\uff0c\u6211\u4e4b\u524d\u5199\u7684\u597d\u50cf\u5e76\u4e0d\u662f\u5f88\u5bf9\uff0cinformation\u5728\u63e1\u624b\u6210\u529f\u7684\u4e0b\u4e00\u5468\u671f\u5e76\u4e0d\u4e00\u5b9a\u4fdd\u6301\uff0c\u4f46\u662f\u6211\u4e4b\u524d\u5199\u7684\u4ee3\u7801\u662f\u63e1\u624b\u6210\u529f\u540estate\u7684\u8f93\u5165\u6539\u53d8\uff0c\u5e76\u5728\u4e0b\u4e00\u4e2a\u5468\u671fstate\u624d\u53d8\u5316\uff0cstate\u53d8\u5316\u4e4b\u540e\u6a21\u5757\u884c\u4e3a\u624d\u5f00\u59cb\u6539\u53d8\uff0c\u4f46\u6b64\u65f6information\u5e76\u4e0d\u4e00\u5b9a\u4fdd\u6301\u76f8\u540c\uff0c\u83ab\u975e\u6211\u9700\u8981\u8ba9state\u53d8\u6210\u7ec4\u5408\u903b\u8f91\uff1f\u4e0d\u6e05\u695a\uff0c\u8ba9\u6211\u8bd5\u8bd5<\/p>\n\n\n\n

\u6211\u5199\u7684\u65f6\u5019\u4e00\u76f4\u62a5\u5faa\u73af\u7535\u8def\u7684\u9519\u8bef\uff0c\u6253\u4e2a\u6bd4\u65b9\uff0cvalid\u548cready\u5728\u67d0\u5468\u671f\u63e1\u624b\uff0c\u5982\u679cstate\u5728\u67d0\u5468\u671f\u5c31\u6539\u53d8\uff0c\u90a3\u5c31\u56de\u6839\u636estate\u8fdb\u884c\u4e0b\u4e00\u6b65\u7684\u884c\u4e3a\uff0c\u4f46\u662f\u7531\u4e8e\u4e0b\u4e00\u6b65\u7684\u884c\u4e3a\u53ef\u80fd\u4f1a\u5bf9valid\u548cready\u8fdb\u884c\u4fee\u6539\uff0c\u4ed6\u4eec\u7684\u4fee\u6539\u53c8\u4f1a\u6539\u53d8state\uff0c\u9020\u6210\u5faa\u73af\uff0c\u6240\u4ee5\u6211\u5ffd\u7136\u7406\u89e3\u7b2c\u4e00\u70b9\u4e86\uff0cvalid\u548cready\u53d7\u5230\u65f6\u949f\u7684\u7ea6\u675f\uff0c\u4f46\u662fstate\u4e0d\u53d7\u65f6\u949f\u7684\u7ea6\u675f\uff0c\u4e4b\u524d\u90fd\u5f04\u53cd\u4e86\uff0c\u8ba9\u6211\u8bd5\u8bd5<\/p>\n\n\n\n

\u611f\u89c9\u6ca1\u5565\u95ee\u9898\uff0crtt\u4e5f\u80fd\u8dd1\uff0c\u63e1\u624b\u6a21\u7248\u4fee\u6539<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u7ec8\u4e8e\u627e\u5230\u7ea6\u675f\u7684\u90e8\u5206\u4e86<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u8fd8\u6709\u4e00\u70b9\u4e0d\u597d\u622a\u56fe\uff0c\u6211\u53d9\u8ff0\u4e00\u4e0b\uff1a\u5c31\u662fvalid\u4fe1\u53f7\u4e00\u65e6assert\uff0c\u5c31\u4e0d\u80fd\u53d6\u6d88until ready is asserted\uff08\u907f\u514d\u6d3b\u9501\uff09<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u770b\u8d77\u6765\u5e76\u4e0d\u662f\u5f88\u96be\u54ce\uff0c\u8fd9\u4e2a\u6700\u96be\u5199\u7684\u53cd\u800c\u662fSRAM\u6a21\u5757\uff0c\u4f46\u662f\u4e00\u4e0b\u591a\u4e86\u8fd9\u4e48\u591a\u63e1\u624b\u4fe1\u53f7\uff0c\u4f30\u8ba1\u8981\u5199\u597d\u591a\u72b6\u6001\u673a\u5570\uff0c\u633a\u9ebb\u70e6\u7684<\/p>\n\n\n\n

\u5206\u4e00\u4e0b\u6b65\u5427<\/p>\n\n\n\n

1.\u6539\u63a5\u53e3<\/p>\n\n\n\n

2.\u6539IFU<\/p>\n\n\n\n

(\u9519\u8bef)\u597d\u96be\ud83e\udd2f\uff0c\u60f3\u4e86\u60f3\uff0cIFU\u5bf9\u4e8e\u5916\u90e8\u6a21\u5757\u7684\u63e1\u624b\u60c5\u51b5\u80af\u5b9a\u4f1a\u5f71\u54cdIFU\u548cIMEM\u7684\u63e1\u624b\u60c5\u51b5\uff0c\u6240\u4ee5\uff0c\u6211\u9700\u8981\u5c06IFU\u548cIMEM\u7684\u63e1\u624b\u72b6\u6001\u653e\u5728IFU\u548c\u5916\u90e8\u6a21\u5757\u4e4b\u540e\uff08\u5176\u5b9e\u4e5f\u4e0d\u5206\u5148\u540e\u5566\uff0c\u611f\u6027\u8ba4\u8bc6\u662f\u6709\u5148\u540e\u7684)<\/p>\n\n\n\n

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3.\u6539IDU<\/p>\n\n\n\n

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\u611f\u89c9addr\u7684\u63e1\u624b\u548cdata\u7684\u63e1\u624b\u5206\u5f00\u7684\u610f\u4e49\u4e0d\u5927\u5440\uff08\u5f53\u7136\u662f\u5bf9\u6211\u6765\u8bf4\uff09\uff0c\u53ef\u80fd\u662f\u66f4\u52a0\u590d\u6742\u7684\u60c5\u51b5\u624d\u9700\u8981\uff0c\u5bf9\u4e8e\u6211\u6765\u8bf4\u610f\u4e49\u4e0d\u5927\u7684\u8bdd\uff0c\u90a3\u6211\u76f4\u63a5\u8ba9\u4ed6\u4eec\u4fe1\u53f7\u4e00\u76f4\u4e00\u81f4\u5c31\u597d\u4e86<\/p>\n\n\n\n

\u5199IFU\u548cIDU\u65f6\uff0c\u6211\u51e0\u4e4e\u90fd\u6ca1\u6709\u7ba1\u6240\u6709\u7684ready\u4fe1\u53f7\u54ce<\/p>\n\n\n\n

4,\u6539SRAM\u6a21\u5757<\/p>\n\n\n\n

\u6211\u6253\u7b97Imem\u548cDmem\u90fd\u7528\u590d\u7528\u540c\u4e00\u5957\u903b\u8f91\uff0c\u4ee5\u4fbf\u540e\u9762\u53ef\u80fd\u9700\u8981\u5408\u5e76\u4e24\u8005<\/p>\n\n\n\n

\u4ed6\u67095\u4e2a\u901a\u9053\uff0c\u6709\u4e9b\u901a\u9053\u4e4b\u95f4\u6709\u4f9d\u8d56\u5173\u7cfb\uff0c\u5c31\u50cfIFU\u548cIDU\uff0cfire1\u548cfire2\u5fc5\u987b\u4ea4\u9519<\/p>\n\n\n\n

\u4e5f\u5c31\u662fAR\u548cR\u4e4b\u95f4\u6709\u4f9d\u8d56\u5173\u7cfb\uff0cAW\uff0cW\u548cB\u4e4b\u95f4\u6709\u4f9d\u8d56\u5173\u7cfb<\/p>\n\n\n\n

\u6700\u7ec8\u6539bug\u65f6IFU\u548cLSU\u5206\u522b\u9700\u8981\u90fd\u67094\u4e2a\u72b6\u6001<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

1\uff0cSRAM\u8bfb\u5199\u5ef6\u8fdf\u5168\u90e8\u4e3a5\uff0c10\uff0c20\u65f6\u5168\u90e8\u6b63\u786e\u542f\u52a8rtt\uff0c\u4e14\u542f\u52a8\u901f\u5ea6\u6709\u5f88\u5927\u4e0d\u540c\u2705<\/p>\n\n\n\n

2\uff0c\u7ed9SRAM\u6dfb\u52a0LSFR\uff0c\u4f9d\u7136\u6210\u529f\u542f\u52a8rtt\u2705<\/p>\n\n\n\n

3\uff0cIFU\u548cLSU\u52a0LSFR\uff0c\u6210\u529f\u542f\u52a8rtt\u2705<\/p>\n\n\n\n

Arbiter<\/mark><\/strong><\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u53c8\u662f\u4e00\u4e2a\u5168\u65b0\u7684\u4efb\u52a1\u634f\uff0c\u5206\u4e00\u4e0b\u6b65\u5427<\/p>\n\n\n\n

1\uff0c\u6539\u63a5\u53e3\uff0c\u628aIFU\u548cLSU\u7684\u63a5\u53e3\u63a5\u5230arb\u4e0a\u9762\uff0carb\u63a5mem<\/p>\n\n\n\n

2,\u5199arb<\/p>\n\n\n\n

\u6709\u4e2abug\uff0c\u4f20\u56de\u6765\u7684\u503c\uff0c\u6bd4\u5982\u8bf4\u8bfb\u51fa\u4e4b\u540e\u8bbe\u7f6e\u7684valid\u503c\uff0c\u7531\u4e8e\u9014\u5f84arb\u4e2d\u7684\u4e00\u4e2a\u5bc4\u5b58\u5668\uff0c\u4f1a\u6bd4\u6ca1\u6709\u52a0\u8fd9\u4e2a\u5bc4\u5b58\u5668\u7684\u60c5\u51b5\u6162\u4e00\u62cd\uff0c\u5bfc\u81f4IFU\u7684handshake\u65e0\u6cd5\u53ca\u65f6\u5b8c\u6210\uff0c\u5bfc\u81f4\u63e1\u624b\u4e4b\u540e\u5e94\u8be5\u8bbe\u7f6eready\u4e3a0\u7684\u4f20\u8f93\u4f1a\u6162\u4e00\u62cd<\/p>\n\n\n\n

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\u5e76\u4e14\u4e4b\u540e\u7531\u4e8e\u53ea\u6709\u4e00\u4e2amem\u4e86\uff0c\u4f60\u5728\u4eff\u771f\u73af\u5883\u4e2d\u60f3\u8981\u8bfb\u51fainst\uff0c\u9700\u8981\u914d\u5408IFU\u7684\u4e00\u4e9b\u72b6\u6001\uff0c\u6211\u4e4b\u524d\u6ca1\u914d\u5408\u597d\uff0c\u4e00\u76f4segment fault\uff0c\u6c83\u9760\uff0c\u8fd9\u79cd\u9519\u8bef\u771f\u7684\u5f88\u96bedebug\uff0c\u4f60\u6839\u672c\u4e0d\u77e5\u9053\u9519\u8bef\u51fa\u5728\u5904\u7406\u5668\u4e0a\u8fd8\u662f\u4eff\u771f\u73af\u5883\u4e0a\u9762\uff0c\u5c31\u7b97\u51fa\u5728\u4eff\u771f\u73af\u5883\u4e0a\u9762\uff0c\u4f60\u4e5f\u65e0\u6cd5\u901a\u8fc7assert\u7b49\u65b9\u6cd5\u5b9a\u4f4d\u9519\u8bef\uff0c\u8fd8\u597d\uff0c\u51ed\u501f\u7740\u6211\u201c\u8fc7\u4eba\u201d\u7684\u611f\u77e5\u80fd\u529b\uff0c\u6211\u5728pmem\u7684\u4e24\u4e2adpic\u4e0a\u9762\u90fd\u8bbe\u8fc7\u8fb9\u754c\uff0c\u8bf4\u660e\u5e76\u4e0d\u662f\u8bfb\u53d6\u5185\u5b58\u51fa\u73b0\u7684\u6bb5\u9519\u8bef\uff0c\u6211\u7684\u76f4\u89c9\u544a\u8bc9\u6211\u662fllvm\u76f8\u5173\u7684\u4ee3\u7801\u51fa\u9519\uff0c\u8bf4\u660e\u6211\u7ed9\u7684inst\u6709\u95ee\u9898\uff0c\u6211\u4e4b\u540e\u5bf9\u7740\u6ce2\u5f62\u770b\u4e86\u4e00\u4e0b\u6b63\u786e\u7684inst\u5bf9\u5e94\u7684\u72b6\u6001\uff0c\u6539\u4e86\u5c31\u597d\u4e86<\/p>\n\n\n\n

\u6211\u7684arb\u73b0\u5728\u7684\u8c03\u5ea6\u7b56\u7565\u5c31\u662f\u54ea\u4e2a\u63e1\u624b\u6210\u529f\u5c31\u9009\u54ea\u4e2a\uff0c\u56e0\u4e3a\u6682\u65f6\u4e0d\u4f1a\u51fa\u73b0\u4e24\u8005\u540c\u65f6\u8bbf\u95ee\u7684\u60c5\u51b5\uff0c\u5982\u679c\u4e4b\u540e\u8981\u5e94\u7528\u4e00\u4e9b\u8c03\u5ea6\u7b56\u7565\u7684\u8bdd\uff0c\u4e5f\u53ea\u9700\u8981\u4fee\u6539\u4e00\u4e0b\u72b6\u6001\u8fc1\u79fb\u7684\u6761\u4ef6\u5373\u53ef\uff0c\u6bd4\u8f83\u597d\u6269\u5c55\uff08\u867d\u7136\u6211\u611f\u89c9\u6211\u5199\u5f97\u50cf\u4e00\u5768\u5c4e\uff0c\u5728\u7528chisel\u7684\u8bed\u6cd5\u5199verilog…\uff09<\/p>\n\n\n\n

\u8bb0\u4e00\u4e0b\u6211\u505a\u5b8c\u8fd9\u4e00\u7ae0\u8282\u4e4b\u540e\u8fd8\u9700\u8981\u5e72\u7684\u4e8b\u60c5\uff1a1\uff0c\u4f18\u5316\u4ee3\u7801 (input\/output)2\uff0c\u5b9e\u73b0rresp\u7684\u529f\u80fd 3\uff0c\u589e\u52a0\u66f4\u591a\u7684\u5f02\u5e38\u673a\u5236<\/p>\n\n\n\n

Xbar<\/mark><\/strong><\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u8fd9\u624d\u662f\u6211\u5fc3\u76ee\u4e2d\u7684\u603b\u7ebf<\/p>\n\n\n\n

\u5206\u4e00\u4e0b\u6b65\u5427<\/p>\n\n\n\n

1\uff0c\u5b9e\u73b0\u8bbe\u5907\u5bc4\u5b58\u5668<\/p>\n\n\n\n

\u662f\u4e0d\u662f\u76f4\u63a5\u590d\u5236mem\u6a21\u5757\u7684\u5b9e\u73b0\u7136\u540e\u628apmem_write\u6539\u6210$write\u5c31\u597d\u4e86?\u8ba9\u6211\u8bd5\u8bd5<\/p>\n\n\n\n

2\uff0c\u5b9e\u73b0xbar<\/p>\n\n\n\n

\u9760\uff0c\u611f\u89c9\u548carb\u597d\u50cf\uff0c\u53ea\u662f\u4eceselect\u72b6\u6001\u8f6c\u79fb\u7684\u903b\u8f91\u4e0d\u4e00\u6837\uff0carb\u662f\u9760\u8c03\u5ea6\u7b56\u7565\uff0cxbar\u5219\u662f\u9760\u5730\u5740\u8bd1\u7801<\/p>\n\n\n\n

\u6709\u4e86\u4e4b\u524d\u7684\u7ecf\u9a8c\uff0c\u9664\u4e86\u4e00\u70b9\u7b14\u8befde\u4e86\u4e00\u4e0bbug\uff0c\u5e94\u8be5\u7b97\u662f\u4e00\u904d\u5199\u5bf9<\/p>\n\n\n\n

\u5c06uart\u63d0\u51fa\u6765\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e4b\u524d\u7684difftest\u673a\u5236\u65e0\u6cd5\u5de5\u4f5c\uff0c\u53ef\u4ee5\u5728uart\u6a21\u5757\u4e2d\u6dfb\u52a0\u4e00\u4e2adpic\u51fd\u6570\u6765\u544a\u77e5\u4eff\u771f\u73af\u5883\u4ec0\u4e48\u65f6\u5019\u8be5skip\u6389\u8fd9\u4e00\u6761\u6307\u4ee4<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u603b\u7ebf\u7ae0\u8282\u6700\u540e\u4e00\u4e2a\u4efb\u52a1\u4e86<\/p>\n\n\n\n

1\uff0c\u5148\u5b9e\u73b0CLINT\uff08\u53ea\u6709mtime\u7684CLINT\uff09<\/p>\n\n\n\n

\u5c06\u4e4b\u524d\u7684UART\u590d\u5236\u8fc7\u6765\u5c31\u597d\u4e86<\/p>\n\n\n\n

2\uff0c\u63a5\u5165\u7cfb\u7edf<\/p>\n\n\n\n

\u9700\u8981\u5728XBAR\u4e2d\u591a\u6dfb\u52a0\u4e00\u4e2a\u8bbe\u5907\uff0c\u5c31\u662f\u591a\u52a0\u4e00\u4e2a\u72b6\u6001\u800c\u5df2\uff0cEZ<\/p>\n\n\n\n

3\uff0c\u4fee\u6539\u4eff\u771f\u73af\u5883\u548cam\u76f8\u5173\u4ee3\u7801<\/p>\n\n\n\n

\u6211\u770bam\u4e4b\u524d\u8bfb\u51fa\u7684\u65f6\u95f4\u662fus\u5355\u4f4d\u7684\uff0c\u4e8e\u662f\u6211\u53ea\u9700\u8981\u770b\u4eff\u771f\u76841\u4e2aclock\u7b49\u4e8e\u591a\u5c11us\u5373\u53ef\uff0c\u8fd9\u4e2a\u9700\u8981\u5728\u4eff\u771f\u73af\u5883\u4e2d\u52a0\u8ba1\u65f6\u5668\u548c\u8ba1\u6570\u5668<\/p>\n\n\n\n

\u4f46\u662f\u6211\u6839\u636e200\u5de6\u53f3\u6d4b\u51fa\u7684\u901f\u7387\u5e76\u4e0d\u592a\u51c6\uff0c\u9700\u8981\u66f4\u5927\u7684\u57fa\u6570<\/p>\n\n\n\n

\u4f3c\u4e4e\u5c31\u662f1 clock = 1us\u54ce\uff0c\u611f\u89c9\u5c31\u5728\u8fd9\u4e2a\u9644\u8fd1\u6d6e\u52a8\uff0c\u65e2\u7136\u5982\u6b64\uff0c\u6211\u5c31\u4e0d\u9700\u8981\u6539\u4e86<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

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\u603b\u7ed3<\/mark><\/strong><\/h2>\n\n\n\n

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