{"id":2428,"date":"2024-07-30T19:02:13","date_gmt":"2024-07-30T11:02:13","guid":{"rendered":"https:\/\/www.yizishun.com\/?p=2428"},"modified":"2024-09-25T23:51:48","modified_gmt":"2024-09-25T15:51:48","slug":"%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e5%92%8c%e7%ae%80%e6%98%93%e7%bc%93%e5%ad%98","status":"publish","type":"post","link":"https:\/\/www.yizishun.com\/?p=2428","title":{"rendered":"\u6027\u80fd\u4f18\u5316\u548c\u7b80\u6613\u7f13\u5b58\uff08ysyx\u65e5\u8bb0\uff09\uff08\u5df2\u5b8c\u7ed3\uff09"},"content":{"rendered":"\n

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    Path Delay\u548cPath Required\u5c31\u662f\u4e0a\u9762\u6240\u8bf4\u7684\u771f\u5b9e\u5ef6\u8fdf\u548c\u6240\u9700\u5ef6\u8fdf\uff0cslack\u5c31\u662fnagative slack\u503c\uff0cFreq\u5c31\u662f\u5728\u771f\u5b9e\u5ef6\u8fdf\u4e0b\u6240\u80fd\u8fbe\u5230\u7684\u5ef6\u8fdf\uff08\u4e4b\u540e\u4f7f\u7528350MHZ\u7efc\u5408\u5904\u7406\u5668\uff0cTNS\u76f4\u63a5\u53d8\u6210-0.6\u4e86\uff09\uff0c\u524d\u4e09\u4e2a\u57fa\u672c\u4e0a\u5c31\u662f\u6574\u4e2a\u8def\u5f84\u7684WNS<\/p>\n\n\n\n

    \"\"
    \u8fd9\u662f\u7b2c\u4e8c\u4e2a\u8868\u683c<\/figcaption><\/figure>\n\n\n\n

    \u8fd9\u5c31\u662f\u6240\u6709\u7684nagative slack\u4e4b\u548c\uff0c\u53ef\u4ee5\u770b\u5230\u8fbe\u5230\u4e86-500\u4e4b\u591a<\/p>\n\n\n\n

    \"\"<\/figure>\n\n\n\n
    \"\"
    \u8fd9\u662f\u7b2c\u4e09\u4e2a\u8868\u683c<\/figcaption><\/figure>\n\n\n\n

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    \u6821\u51c6\u8bbf\u5b58\u5ef6\u8fdf<\/mark><\/strong><\/h3>\n\n\n\n
    \"\"<\/figure>\n\n\n\n

    350MHZ\uff0c\u90a3\u4e48r\u5c31\u662f3.5\uff0c\u5c06s\u8bbe\u5b9a\u4e3a2\uff0c\u5176\u5b9e\u7b49\u5f85\u7684\u6bcf\u5468\u671f\u53ea\u9700\u8981\u52a02.5\u5373\u53ef\uff0c\u56e0\u4e3anpc\u4e5f\u540c\u65f6\u5728\u7b49\u5f85\u4e2d\uff0c\u5047\u5982t0\u662f0\uff0ct1\u662f4\uff0c\u90a3\u6839\u636e\u7b49\u5f0ft1’\u5c31\u9700\u8981\u662f14\uff0c\u5728\u7b49\u5f85\u7684\u6bcf\u5468\u671f\u52a02.5\uff0c\u7d2f\u52a0\u5668\u7684\u503c\u5c31\u662f10\uff0c\u52a0\u4e0a\u539f\u672c\u76844\u5468\u671f\u4e5f\u6b63\u597d\u662f14\uff0c\u5f53\u7136\uff0c\u771f\u5b9e\u7684\u9700\u8981\u6bcf\u5468\u671f\u52a05\u51cf2\u5373\u53ef<\/p>\n\n\n\n

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

    \u8fd9\u4e2a\u4efb\u52a1\u662f\u5bfb\u627e\u6700\u5927\u53ef\u80fd\u7684\u5de5\u4f5c\u9891\u7387<\/p>\n\n\n\n

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

    \u5bc4\u5b58\u5668\u7684\u5ef6\u8fdf\u4f7f\u5f97\u4e0a\u9650\u57284GHZ<\/p>\n\n\n\n

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

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

    \u4e5f\u53ea\u80fd\u8dd11GHZ\u5de6\u53f3<\/p>\n\n\n\n

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

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

    \u6211\u770b\u522b\u4eba\u7684\u5904\u7406\u5668\uff0c\u5728\u8fd9\u4e00\u6b65\u9891\u7387\u6bd4\u6211\u9ad8\uff0c\u9762\u79ef\u6bd4\u6211\u5c11\uff0c\u81ea\u95ed\u4e86……<\/p>\n\n\n\n

    make perf\u6211\u5c31\u5b9e\u73b0\u6210\u4e86make -C {microbench}\u7136\u540e\u6267\u884c\u6d4b\u8bd5\uff0c\u8fd9\u4e2amake perf\u6211\u662f\u5728\u6d4b\u8bd5\u5b8c\u4e4b\u540e\u7684\u90a3\u6b21commit\u505a\u7684\uff0c\u4f46\u662f\u4f3c\u4e4e\u4e0a\u4e00\u4e2acommit\u5c31\u9700\u8981\u8fd9\u4e2aperf\uff0c\u6240\u4ee5\u53c8\u5b66\u5230\u4e00\u62db\uff0cgit commit –amend -m{commit}\u53ef\u4ee5\u878d\u5408\u8fd9\u6b21\u6539\u52a8\u5230\u67d0\u4e00\u6b21commit\uff0c-m\u7f3a\u5931\u9ed8\u8ba4\u4e0a\u4e00\u6b21<\/p>\n\n\n\n

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

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    \u6539chisel\u90e8\u5206\u7684\u8bdd\u5c31\u662f\u5c06\u4e4b\u524d\u7684xbar\u62ff\u8fc7\u6765\uff0c\u5728\u9876\u5c42\u6a21\u5757\u9009\u62e9\u6027\u4f8b\u5316\u54ea\u4e2axbar\u5c31\u884c<\/p>\n\n\n\n

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    1\uff0cmakefile\u7684ARCH\u53d8\u91cf\uff0c\u53ef\u4ee5\u5728\u547d\u4ee4\u884c\u8d4b\u503c\uff08\u4f1a\u63a7\u5236src\u7684\u9009\u62e9\u548cc\u4eff\u771f\u73af\u5883\u7684\u6539\u53d8\uff09<\/p>\n\n\n\n

    2\uff0cchisel\u4e2d\u7684config.scala\uff0c(\u63a7\u5236xbar\u7684\u9009\u62e9)\uff08\u5982\u679c\u53ef\u4ee5\u901a\u8fc7\u7f16\u8bd1\u5668\u5de5\u5177\u4f20\u53d8\u91cf\u5c31\u597d\u4e86\uff0c\u6211\u5c31\u4e0d\u9700\u8981\u6539\u4e24\u4e2a\u4e86\u545c\u545c\u545c\uff09<\/p>\n\n\n\n

    3\uff0cclint\u4e2d\u7684addr\uff08\u7531\u4e8eclint\u662fverilog\u5199\u7684\uff0c\u7136\u540eclint\u5730\u5740\u53c8\u4f1a\u5728soc\u4e2d\u7528\uff0c\u6240\u4ee5\u9700\u8981\u4fee\u6539\uff09<\/p>\n\n\n\n

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

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

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

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    \u6539\u4e86\uff0c\u8f93\u51fa\u6b63\u5e38\u4e86\uff0c\u4f46\u662f\u8dd1microbench\u89e6\u53d1\u4e86assert\uff0c\u8349\u4e86<\/p>\n\n\n\n

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    iCache<\/mark><\/strong><\/h2>\n\n\n\n

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

    \u8fd9\u4e00\u90e8\u5206\u7406\u89e3\u4e86\u4e00\u6bb5\u65f6\u95f4\uff0c\u8bb0\u5f55\u4e00\u4e0b\u6211\u7684\u7406\u89e3<\/p>\n\n\n\n

    \u9996\u5148\u8fd9\u5b9e\u9645\u4e0a\u662f\u5bf9dram\u4e2d\u7684\u5185\u5b58\u505a\u4e86\u4e24\u4e2a\u5206\u7ec4\u64cd\u4f5c\uff0c\u9996\u5148\uff0c\u6309b\u5b57\u8282\u4e3a\u4e00\u7ec4\uff0c\u5206\u4e3a\u4e862^(31-m)\u4e2a\u7ec4\uff0c\u6bcf\u4e00\u4e2a\u7ec4\u7684\u6807\u53f7\u662ftag\uff0c\u4e5f\u5c31\u662f\u5730\u5740\u7684\u9ad8[31:m]\u4f4d\uff0c\u4f4e\u4f4d\u4e3atag\u4e2d\u6bcf\u4e00\u4e2a\u5b57\u8282\u7684\u7d22\u5f15\uff0c\u4e4b\u540e\uff0c\u5bf9\u4e8e\u8fd9\u4e2a\u5927tag\u53c8\u8fdb\u884c\u4e86\u4e00\u6b21\u5206\u7ec4\uff08\u8fd9\u4e2a\u5206\u7ec4\u7684\u539f\u56e0\u662fcache\u5927\u5c0f\u5c0f\u4e8edram\u7684\u5927\u5c0f\uff09\uff0c\u8fd9\u4e2a\u65f6\u5019\u5730\u5740\u7684\u9ad8[31:m+n]\u4e3a\u4e00\u4e2a\u7ec4\u7684\u7d22\u5f15\uff0c\u56fe\u4e2d\u7684index\u5219\u662f\u53e6\u4e00\u79cd\u610f\u4e49\u4e0a\u7684offset\uff08cache\u5757offset\uff09\uff0c\u4f4e\u4f4d\u662f\u5b57\u8282offset<\/p>\n\n\n\n

    \u7efc\u4e0a\u6240\u8ff0\uff0c\u5bf9\u4e8edram\u4e3b\u5b58\u4e2d\u7684\u5927\u6570\u7ec4\u505a\u4e86\u4e24\u6b21\u5206\u7ec4\uff0c\u5927\u7ec4\u7684\u7d22\u5f15\u662ftag\uff0c\u4e00\u4e2atag\u7ec4\u53ef\u4ee5\u5b8c\u5b8c\u5168\u5168\u6b63\u597d\u653e\u5165\u4e00\u4e2acache\u4e2d\uff0c\u7136\u540eindex\u5c31\u6307\u793a\u4e86\u5728\u8fd9\u4e2atag\u7ec4\u4e2dcache\u5757\u7684\u7d22\u5f15\uff0c\u4e00\u4e2aindex\u7ec4\u6b63\u597d\u653e\u5165\u4e00\u4e2acache\u5757\uff0coffset\u4ece\u5b57\u8282\u5c42\u9762\u6307\u793a\u5728cache\u5757\u4e2d\u7684\u7d22\u5f15\uff08\u8111\u4e2d\u9700\u8981\u6709\u4e00\u4e2adram\u88ab\u5206\u4e86\u4e24\u6b21\u7ec4\u7684\u56fe\u50cf\uff09<\/p>\n\n\n\n

    \u81f3\u4e8e\u6700\u540e\u4e00\u53e5\u201c index\u4e0d\u540c\u7684\u6570\u636e\u5757\u5fc5\u5b9a\u4f1a\u88ab\u6620\u5c04\u5230\u4e0d\u540c\u7684cache\u5757\u4e2d\u201d\uff0c\u8fd8\u53ef\u4ee5\u8fd9\u4e48\u8bf4\uff0c\u4e00\u4e2acache\u5757\u7684index\u6c38\u8fdc\u662f\u76f8\u540c\u7684\uff0c\u662ftag\u6807\u8bc6\u7740\u8fd9\u4e2acache\u5757\u771f\u6b63\u5b58\u653e\u7684\u662fdram\u54ea\u4e00\u90e8\u5206\u7684\u6570\u636e\uff0c\u800c\u8fd9\u4e0d\u540c\u90e8\u5206\u5757\u7684\u6570\u636e\u4e4b\u95f4\u7684\u8ddd\u79bb\u5c31\u662f\u4e00\u4e2atag\u7ec4\u7684\u5927\u5c0f\uff0c\u53732^(m+n-1)<\/p>\n\n\n\n

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

    valid\u548ctag\u6765\u6307\u793a\u8fd9\u4e2acache\u5757\u4e2d\u7684\u6570\u636e\u5b58\u5728\u4e8edram\u7684\u54ea\u4e00\u90e8\u5206\u548c\u662f\u5426\u6709\u6548\uff08\u8bb0\u4f4f\uff0cindex\u662f\u9690\u542b\u4fe1\u606f\uff0c\u786e\u5b9a\u4e86\u4e00\u4e2acache\u5757\u5c31\u786e\u5b9a\u4e86\u4e00\u4e2aindex\uff09<\/p>\n\n\n\n

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

    \u9996\u5148\u7b2c\u4e00\u6b65\u5e94\u8be5\u786e\u5b9aicache\u5e94\u8be5\u653e\u5728\u54ea\u4e2a\u4f4d\u7f6e\uff0ccore->arbiter->xbar->soc\u603b\u7ebf->dram\uff0c\u8fd9\u662f\u6211\u7684cpu\u4e00\u6b21\u8bbf\u5b58\u7684\u57fa\u672c\u8def\u5f84\uff0c\u8bbf\u5b58\u4fe1\u53f7\u7ecf\u8fc7xbar\u7684\u65f6\u5019\u5148\u5224\u65ad\u662f\u5426\u662fclint\uff0c\u4e0d\u662f\u5c31\u662f\u8fdb\u5165soc\u603b\u7ebf\uff0c\u5982\u679c\u653e\u5728soc\u548cxbar\u4e4b\u95f4\uff0c\u6050\u6015\u6709\u5199\u8bbe\u5907\u7684\u8bbf\u95ee\u4e5f\u4f1a\u8fdb\u5165icache\uff0c\u4f46\u662f\u6839\u636e\u7b2c\u4e8c\u4e2a\u9ec4\u6846\uff0c\u53ea\u6709flash\uff0csdram\u7684\u8bbf\u95ee\u65f6\u5019icache\uff0c\u5176\u5b9e\u672c\u8d28\u7684\u95ee\u9898\u5c31\u662fsoc\u7684\u8bbf\u95ee\u662f\u7531\u54ea\u4e00\u4e2a\u6a21\u5757\u6765\u505a\uff0c\u8fd9\u5f88\u50cf\u4e00\u4e2aarbiter\u7684\u611f\u89c9\u5440\uff08\u591a\u4e2amaster\uff0c\u4e00\u4e2a\u662ficache\uff0c\u4e00\u4e2a\u662fxbar\u5bf9\u4e8euart\u7b49\u8bbe\u5907\u7684\u8bbf\u95ee\uff09<\/p>\n\n\n\n

    \u4e0e\u5176\u6dfb\u52a0\u65b0\u7684arb\uff0c\u4e0d\u5982\u590d\u7528\u4e4b\u524d\u7684arb<\/p>\n\n\n\n

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

    \u4e0a\u9762\u6ca1\u663e\u793a\u5b8c\u5168\u7684\u662f\u5904\u7406\u5668\u7ed3\u6784\uff0c\u7d2b\u8272\u7684\u7ebf\u5168\u90e8\u90fd\u662fAXI4\u534f\u8bae<\/p>\n\n\n\n

    icache\u9700\u8981\u5bf9\u603b\u7ebf\u8fdb\u884c\u8bbf\u95ee\uff08\u6839\u636e\u5757\u5927\u5c0f\u7684\u4e0d\u540c\u53ef\u80fd\u9700\u8981\u591a\u6b21\u8bbf\u95ee\uff08\u77a5\u4e86\u4e00\u773c\u540e\u9762\u7684\u8bb2\u4e49\uff0c\u8981\u7528\u5230axi\u7684\u7a81\u53d1\u4f20\u8f93\uff0c\u6211\u4f30\u8ba1\u5c31\u662f\u6765\u5b9e\u73b0\u8fd9\u4e2a\u591a\u6b21\u8bbf\u95ee\u7684\uff09\uff0c\u5e0c\u671b\u53ef\u4ee5\u505a\u6210\u53ef\u914d\u7f6e\u7684\uff09<\/p>\n\n\n\n

    \u662f\u4e00\u4e2a\u603b\u7ebf\u72b6\u6001\u673a\uff0c\u9700\u8981\u63a5\u7ba1axi\u534f\u8bae\uff0c\u611f\u89c9\u5f88\u7b80\u5355…\uff0c\u6709\u4e00\u4e9b\u5c0fbug\uff0c\u90fd\u53ea\u662f\u56e0\u4e3a\u8111\u62bd\u628a4\u5b57\u8282\u5f53\u62104\u4f4d\u4e86<\/p>\n\n\n\n

    \u52a0\u4e0a\u6027\u80fd\u63a2\u9488\u8dd1microbench\uff0c\u518d\u7efc\u5408\uff0c\u6700\u540e\u8bb0\u5f55\u6570\u636e<\/p>\n\n\n\n

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

    \u611f\u89c9\u6d89\u53ca\u77e5\u8bc6\u76f2\u533a\u4e86<\/p>\n\n\n\n

    \u4e0d\u662f\u54e5\u4eec\uff0c\u8fd8\u771f\u627e\u51fa\u4e00\u4e2a\u9519\u8bef\uff1f<\/p>\n\n\n\n

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

    \u6211\u4e0d\u662f\u5f88\u7406\u89e3\u8bf4\u5b9e\u8bdd\uff0c\u770b\u8fd9\u4e5f\u6ca1\u6709hit\u5440\uff0c\u76f4\u63a5\u4ece\u4e2d\u8bfb\u4e0d\u53ef\u80fd\u51fa\u9519\u7684\uff0c\u5e94\u8be5\u662f\u6211\u8fd9\u4e2atestbench\u5199\u9519\u4e86\uff0c\u56e0\u4e3a\u8fd9\u662f\u521a\u521areset\u5c31\u51fa\u9519\u4e86\uff0c\u6709\u4e00\u8bf4\u4e00\uff0ctestbench\u5199\u9519\u4e86\u90a3testbench\u600e\u4e48\u6d4b\u5462\uff1f\u6709\u70b9\u8ff7<\/p>\n\n\n\n

    \u4e0d\u5bf9\u4e0d\u5bf9\uff0c\u597d\u50cf\u8fd8\u771f\u662f\u6211icache\u6709\u70b9\u95ee\u9898\uff0c\u53ea\u662f\u8fd9\u4e2a\u95ee\u9898\u57fa\u672c\u4e0a\u4e0d\u4f1a\u5b58\u5728\u4e8e\u73b0\u5b9e\u7684\u7a0b\u5e8f<\/p>\n\n\n\n

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

    reset\u4e4b\u540e\u6162\u4e86\u4e00\u4e2a\u5468\u671f\uff0crvalid\u624d\u7f6e0\uff0c\u4f46\u662f\u5176\u5b9eaxi\u534f\u8bae\u5e76\u6ca1\u6709\u89c4\u5b9a\u8fd9\u4e2a\uff0c\u6bd5\u7adfa\u901a\u9053\u90fd\u8fd8\u6ca1\u6709\u63e1\u624b\uff0c\u4f46\u662f\u7531\u4e8eassert\u7684\u6761\u4ef6\u5c31\u662f\u5728rvalid\u4e4b\u4e0b\u8fdb\u884c\u7684\uff0c\u6240\u4ee5\u5c31assert\u6389\u4e86\uff0c\u4f46\u662f\u5b9e\u9645\u4e0aar\u901a\u9053\u6ca1\u6709\u63e1\u624b\uff0c\u4e0a\u6e38\u6a21\u5757\u4e0d\u53ef\u80fd\u6839\u636e\u8fd9\u4e2arvalid\u6765\u53d6\u6570\u636e\u7684\uff0c\u4e0d\u8fc7\u770b\u4e86\u624b\u518c\uff0c\u8fd9\u91cc\u786e\u5b9e\u8fd8\u662f\u4e0d\u592a\u597d<\/p>\n\n\n\n

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

    \u6539\u4e86\u4e00\u4e2a\u53c8\u6765\u4e00\u4e2a<\/p>\n\n\n\n

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

    \u770b\u8d77\u6765\u50cf\u662f\u5728state\u4e3a0\u7684\u65f6\u5019\u5c1d\u8bd5\u4ecesoc\u4e2d\u8bfb\u6570\u636e<\/p>\n\n\n\n

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

    \u662f\u56e0\u4e3a\u6211\u5728\u8fd9\u4e2a\u72b6\u6001\u4e0b\u4fdd\u6301\u7684in<>out\u8fde\u63a5\uff0c\u5bfc\u81f4\u7684\u9519\u8bef\uff0c\u54c7\uff0c\u592a\u7ec6\u4e86\uff0c\u592a\u5b8c\u7f8e\u4e86\uff0c\u592a\u725b\u903c\u4e86\uff0c\u8fd9tm\u4e5f\u80fd\u5457\u68c0\u6d4b\u51fa\u6765\uff0c\u6211\u9760\uff0c\u8fd9\u4e2a\u8bf4\u5b9e\u8bdd\u8fd8\u771f\u662f\u6211\u7684\u758f\u5ffd\uff0c\u4fee\u6539\u5982\u4e0b<\/p>\n\n\n\n

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

    \u8fd8\u662f\u5b58\u5728\u95ee\u9898<\/p>\n\n\n\n

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

    \u4ececacheData\u4e2d\u8bfb\u51fa\u7684\u503c\u548cmem\u4e2d\u7684\u503c\u4e0d\u4e00\u6837\uff0c\u662f\u4e0d\u662f\u8bf4\u660e\u8fd9\u4e2a\u503c\u5728\u5199\u5165icache\u7684\u65f6\u5019\u51fa\u9519\u4e86\uff1f<\/p>\n\n\n\n

    \u5c1d\u8bd5\u5c06\u5199\u5165\u7684\u503c\u63d0\u53d6\u51fa\u6765\u8fdb\u884cassert\u68c0\u67e5\uff0c\u4f46\u662f\u5e76\u6ca1\u6709\u89e6\u53d1\u9519\u8bef\uff0c\u6ca1\u6709\u5199\u4e4b\u524d\u5c31\u51fa\u9519\uff0c\u6211\u8d8a\u6765\u8d8a\u8ff7\u4e86<\/p>\n\n\n\n

    \u770b\u8d77\u6765\u50cf\u662fcache\u6ca1\u6709\u521d\u59cb\u5316\uff1fno\uff0c\u6211\u521d\u59cb\u5316\u4e86\u4e4b\u540e\u8fd8\u662f\u8fd9\u6837\u7684\uff0c\u5f88\u5947\u602a\u5f88\u5947\u602a\uff0c\u4ee4\u4eba\u65e0\u8bed\u554a\uff08\u867d\u7136\u5f88\u65e0\u8bed\uff0c\u4f46\u8bf4\u5b9e\u8bdd\uff0c\u6211\u771f\u662f\u7231\u6b7b\u8fd9\u4e2a\u529f\u80fd\u4e86\uff0c\u611f\u89c9\u4ed6\u53ef\u4ee5\u628a\u6bcf\u4e00\u4e2a\u6a21\u5757\u53d8\u5f97\u5b8c\u7f8e\u65e0\u7f3a\uff09<\/p>\n\n\n\n

    \u611f\u89c9\u6709\u70b9\u7834\u9632\uff0c\u4e0d\u7ba1\u4e86\uff0c\u4e0d\u505a\u8fd9\u4e2a\u4e86<\/p>\n\n\n\n

    \u7f13\u5b58\u7684\u4f18\u5316<\/mark><\/strong><\/h2>\n\n\n\n

    \u4e3b\u8981\u662f\u63d0\u5347\u547d\u4e2d\u7387<\/p>\n\n\n\n

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

    \u7b80\u5355\u9700\u6c42\u5206\u6790\uff1acachesim\u7684\u4f5c\u7528\u5c31\u662f\u8bfb\u5165itrace\u6587\u4ef6\uff08\u53ea\u9700\u8981\u5730\u5740\uff08\u7531\u4e00\u4e2a\u51fd\u6570\u6765\u5b9e\u73b0\u7ec6\u8282\uff0c\u8fd4\u56deinst addr\uff09\uff09\uff0ccachesim\u4e2d\u9700\u8981\u6709\u4e00\u4e2a\u548c\u771f\u6b63icache\u6709\u4e00\u6837\u53c2\u6570\u7684cache\uff08\u53c2\u6570\u5e94\u8be5\u662f\u53ef\u914d\u7f6e\u7684\uff09\uff08\u4f46\u662f\u5176\u4e2d\u53ea\u6709metadata\uff09\uff0c\u5bf9\u4e8e\u6bcf\u4e00\u4e2a\u4f20\u5165\u7684addr\uff0c\u7528cache\u7684\u903b\u8f91\u5224\u65ad\u662f\u5426\u9700\u8981\u5199\u5165\uff08\u5373\u662f\u5426hit\uff09\uff0c\u7d2f\u52a0hit\u6b21\u6570\u548c\u603b\u6b21\u6570\u548cmiss\u6b21\u6570\uff0c\u6700\u540e\u5f97\u51fa\u7ed3\u679c\u3002\u5176\u5b9e\u662f\u6bd4\u8f83\u76f4\u63a5\u7684\u9700\u6c42\uff0c\u5f88\u5bb9\u6613\u4e00\u773c\u770b\u5230\u80cc\u540e\u7684\u5b9e\u73b0\u65b9\u5f0f<\/p>\n\n\n\n

    \u60f3\u7528c++\u6765\u505a\uff0cc++\u67094\u90e8\u5206\uff1ac-c++\uff0cstl-c++\uff0cobjective-c++\uff0ctemplete-c++\u3002\u6211\u60f3\u4e3b\u8981\u7528\u7b2c\u4e09\u4e2a\u6765\u5b9e\u73b0<\/p>\n\n\n\n

    \u5728\u505a\u8fd9\u4e2a\u4e4b\u524d\uff0c\u6211\u60f3\u5148\u628atrace\u6587\u4ef6\u505a\u51fa\u6765<\/p>\n\n\n\n

    nemu\u9700\u8981\u80fd\u8bfb\u5165\u5e76\u8fd0\u884criscv32e-ysyxsoc\u7684\u6587\u4ef6\uff0c\u6700\u4e3b\u8981\u7684\u96be\u70b9\u5c31\u662f\u4e24\u8005\u7684am\u4e0d\u592a\u4e00\u6837\uff0c\u5f53\u7136\uff0cnemu\u4e0d\u7528\u81ea\u5df1\u7684am\uff0c\u4f46\u662f\u7531\u4e8eam\u4e0d\u4e00\u6837\uff0c\u786c\u4ef6\u4e0a\u9762\u53ef\u80fd\u5b58\u5728\u4e00\u4e9b\u5730\u5740\u51b2\u7a81\u7b49\u95ee\u9898\uff0c\u6216\u8005\u8bf4ysyxsoc\u9700\u8981\u5bf9\u4e32\u53e3\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u4f46\u662fnemu\u4e0d\u9700\u8981\uff0c\u5c31\u4f1a\u4ea7\u751f\u4e00\u4e9b\u95ee\u9898<\/p>\n\n\n\n

    \u4e4b\u524d\u4e3a\u4e86\u4f7fnemu\u652f\u6301ysycsoc\u7684difftest\uff0c\u585e\u4e86\u5f88\u591a\u5c4e\u5230nemu\u91cc\u9762\uff0c\u6211\u73b0\u5728\u60f3\u987a\u4fbf\u6e05\u4e00\u4e0b\u8fd9\u5768\u5c4e\uff0c\u4f7fnemu\u53ef\u4ee5\u539f\u751f\u652f\u6301ysyxsoc\uff0c\u4e00\u4e3e\u628adifftest\u4e00\u4e9b\u9057\u7559\u95ee\u9898\u7ed9\u89e3\u51b3\uff0c\u8fd8\u4e3a\u4e4b\u540e\u53ef\u80fd\u7684\u529f\u80fd\u6269\u5c55\u7559\u4e0b\u4e00\u4e2a\u5e72\u51c0\u7684\u73af\u5883\uff0c\u5176\u5b9e\u5c31\u662f\u6539\u4e00\u4e0b\u4ed6\u7684\u5185\u5b58\u903b\u8f91<\/p>\n\n\n\n

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

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

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

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

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

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

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    \u6709\u70b9\u4e0d\u5999\u554a\uff0c\u6211\u770b\u6211\u4e4b\u524d\u5b9e\u73b0sdram\u9897\u7c92\u7684\u65f6\u5019\u597d\u50cf\u6ca1\u6709\u5b9e\u73b0\u7a81\u53d1\u4f20\u8f93\u547d\u4ee4\uff08\u8fd9\u662f\u540e\u8bdd\u4e86\uff0c\u6211\u73b0\u5728\u6700\u5e94\u8be5\u505a\u7684\u5e94\u8be5\u662f\u5148\u628a\u8fd9\u63a7\u5236\u5668\u505a\u597d\uff09<\/p>\n\n\n\n

    \u6211\u4e4b\u524d\u5728\u770b\u8fd9\u4e2a\u4ee3\u7801\u7684\u65f6\u5019\u4e5f\u603b\u7ed3\u8fc7\u8bfbverilog\uff08HDL\uff09\u4ee3\u7801\u7684\u65b9\u6cd5\uff0c\u4f46\u662f\u6211\u73b0\u5728\u89c9\u5f97\u90a3\u4e2a\u65b9\u6cd5\u662f\u5b8c\u5168\u8bfb\u61c2\u7684\u65b9\u6cd5\uff0c\u4f46\u662f\u5176\u5b9eHDL\u548c\u6b63\u5e38\u7684\u9ad8\u7ea7\u8bed\u8a00\u6bd4\u5982c\u4e0d\u540c\u7684\u4e00\u70b9\u5c31\u662f\uff0cc\u4ee3\u7801\u7684\u903b\u8f91\u662f\u8fde\u7eed\u7684\uff0c\u4e00\u822c\u6765\u8bf4\u5c31\u662f\u76f4\u63a5\u987a\u5e8f\u5411\u4e0b\u8bfb\uff0c\u9047\u5230\u51fd\u6570\u8fdb\u53bb\u8bfb\uff0c\u57fa\u672c\u4e0a\u6574\u4e2a\u903b\u8f91\u5c31\u7406\u6e05\u4e86\uff0c\u4f46\u662fHDL\u4e0d\u540c\uff0c\u4ed6\u6ca1\u6709\u4e00\u4e2a\u603b\u4f53\u7684\u903b\u8f91\uff0c\u4ed6\u662f\u6bcf\u4e00\u4e2a\u4fe1\u53f7\u6709\u6bcf\u4e00\u4e2a\u4fe1\u53f7\u7684\u903b\u8f91\uff0c\u6700\u591a\u603b\u4f53\u52a0\u4e00\u4e2a\u72b6\u6001\u673a\u7684\u903b\u8f91\uff0c\u6bd4\u5982\u4f60\u5728\u770b\u524d\u9762\u7684\u4ee3\u7801\u53ef\u80fd\u5c31\u9700\u8981\u4e00\u4e9b\u540e\u9762\u624d\u8d4b\u503c\u7684\u4fe1\u53f7\u7684\u503c\uff0c\u4f46\u662f\u4ece\u65f6\u95f4\u4e0a\u6765\u8bf4\uff0c\uff08\u4ee3\u7801\uff09\u540e\u9762\u7684\u4fe1\u53f7\u53ef\u80fd\u6bd4\u4f60\u73b0\u5728\u770b\u7684\u4ee3\u7801\u8d4b\u503c\u5f97\u66f4\u65e9\uff0c<\/p>\n\n\n\n

    \u6240\u4ee5\u6211\u89c9\u5f97\u5c31\u6ca1\u6709\u5fc5\u8981\u4e00\u5f00\u59cb\u628a\u6240\u6709\u4ee3\u7801\u770b\u61c2\uff0c\u9700\u8981\u4ec0\u4e48\u770b\u4ec0\u4e48\u5c31\u597d\u4e86\uff08\u524d\u63d0\u662f\u9700\u8981\u5bf9\u6574\u4e2a\u4fe1\u53f7\u7684\u903b\u8f91\u6e05\u695a\uff09\uff0c\u6bd4\u5982\u6211\u5c31\u662fbvalid\u6ca1\u6709\uff0c\u6211\u5c31\u53bb\u627e\u8fd9\u4e2a\u4fe1\u53f7\u7684\u903b\u8f91\uff0c\u53d1\u73b0\u8fd9\u4e2a\u4fe1\u53f7\u662f\u4e09\u4e2a\u4fe1\u53f7\u7684\u7ec4\u5408<\/p>\n\n\n\n

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

    \u7136\u540e\u770b\u6ce2\u5f62<\/p>\n\n\n\n

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

    \u53d1\u73b0\u662f\u540e\u4e24\u4e2a\u4fe1\u53f7\u7684\u95ee\u9898\uff0c\u6211\u5c31\u53ea\u9700\u8981\u9012\u5f52\u7684\u53bb\u8ffd\u8fd9\u4e24\u4e2a\u4fe1\u53f7\u7684\u903b\u8f91\u90e8\u5206\u5c31\u597d<\/p>\n\n\n\n

    \u770b\u6837\u5b50\u539f\u56e0\u662f\u6211\u7684wvalid\u6301\u7eed\u65f6\u95f4\u592a\u77ed\u4e86\uff0c\u4f46\u662f\u4e0d\u662f\u53ea\u8981\u63e1\u624b\u6210\u529f\u4e86\u5c31\u53ef\u4ee5\u7f6e0\u4e86\u5417\uff0c\u6709\u70b9\u8ff7\u60d1\uff0c\u770b\u770b\u624b\u518c<\/p>\n\n\n\n

    \u4f3c\u4e4e\u5e76\u4e0d\u662f\u8fd9\u4e2a\u539f\u56e0<\/p>\n\n\n\n

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

    \u50cf\u662f\u8fd9\u4e2awrite_active_w\u7684\u539f\u56e0\uff0c\u611f\u89c9\u8fd9\u4e2a\u4fe1\u53f7\u8981\u6301\u4e45\u4e00\u70b9\u624d\u884c<\/p>\n\n\n\n

    \u627e\u5230\u95ee\u9898\u4e86\uff0c\u8fd8\u662f\u6211\u7684wvalid\u548cawvalid\u6301\u7eed\u65f6\u95f4\u592a\u77ed\uff0c\u4f46\u662f\u662f\u56e0\u4e3aawready\u4fe1\u53f7\u5728\u8fd9\u8fb9\u4e00\u76f4output\u4e3a0\uff0c\u4f46\u662f\u6211\u7684core\u63a5\u6536\u5230\u7684\u662f1\uff0c\u4e2d\u95f4\u6709\u5ef6\u8fdf<\/p>\n\n\n\n

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

    \u4ece\u6ca1\u6709\u9047\u89c1\u8fc7\u7684\u9519\u8bef\uff0c\u592a\u8be1\u5f02\u4e86\uff0c\u5b9e\u9645\u4e0a\u5728awready\u4e3a0\u7684\u65f6\u5019\uff0csoc\u624d\u771f\u6b63\u4ecesdram\u63a7\u5236\u5668\u4e2d\u8bfb\u51fa\u503c\uff0c\u4f46\u662f\u7ecf\u8fc7delay\u5230core\u65f6\uff0cawready\u8fd8\u6709\u5f88\u957f\u4e00\u6bb5\u65f6\u95f4\u76841\uff0c\u6240\u4ee5\u8fd9\u65f6\u5019\u5982\u679cawvalid\u7f6e1\u5c31\u4f1a\u5bfc\u81f4lsu\u9519\u8bef\u7684\u8fdb\u884c\u63e1\u624b\uff08\u548c\u4e00\u4e9b\u5ef6\u8fdf\u7684\u5783\u573e\u4fe1\u53f7\u8fdb\u884c\u63e1\u624b\uff09\uff0c\u4f1a\u5bfc\u81f4awvalid\u9519\u8bef\u7684\u7f6e\u7a7a\u800c\u4e0d\u662f\u8fdb\u884c\u7b49\u5f85\uff0cwvalid\u540c\u7406<\/p>\n\n\n\n

    \u6211\u8ba4\u4e3a\u9519\u8bef\u7684\u6839\u6e90\u597d\u50cf\u662fsoc\u7684awready\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u665a\u624d\u53d8\u5316\uff0c\u4f46\u662f\u6211\u89c9\u5f97\u8fd9\u662f\u56e0\u4e3a\u4e4b\u524dsoc\u4e2d\u7684xbar\u628a\u4fe1\u53f7\u5b9a\u4f4d\u5230flash\u91cc\u9762\u4e86\uff0c\u5bfc\u81f4\u8981\u8fdb\u884c\u8f6c\u6362\u9700\u8981addr\u7684\u5207\u6362<\/p>\n\n\n\n

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

    \u4f3c\u4e4e\u8fd8\u771f\u662f\u6211\u7684\u9505\uff0c\u8981\u60f3\u786e\u4fddsoc\u7ed9\u7684\u6570\u636e\u662f\u6b63\u786e\u7684\uff0c\u5fc5\u987b\u8ba9addr\u4ee5\u6700\u5feb\u7684\u901f\u5ea6\u51fa\u53bb<\/p>\n\n\n\n

    \u51fa\u53bb\u7684\u4fe1\u53f7\u5ef6\u8fdf\uff0c\u8fdb\u6765\u7684\u4fe1\u53f7\u5ef6\u8fdf\uff0c\u5bfc\u81f4\u6211lsu\u83b7\u5f97\u7684\u4fe1\u53f7\u5b9e\u9645\u4e0a\u5ef6\u8fdf\u4e86\u4e24\u500d\u4e2d\u95f4\u7684\u65f6\u95f4<\/p>\n\n\n\n

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

    \u4f46\u662f\u624b\u518c\u4e0a\u53c8\u8bf4axi\u4fe1\u53f7\u4e2d\u95f4\u4e0d\u80fd\u6709\u7ec4\u5408\u903b\u8f91\uff0c\u8fd9\u8be5\u5982\u4f55\u662f\u597d\uff0c\u6211\u7684master\u7684addr\u53d8\u5316\u77ac\u95f4\uff0cawready\u5c31\u53d8\u5316\u4e86\uff0c\u6211addr\u81f3\u5c11\u8981\u7ecf\u8fc7\u4e00\u4e2axbar\u5427\uff0cawready\u4e5f\u5e94\u8be5\u81f3\u5c11\u7ecf\u8fc7\u4e00\u4e2axbar\uff0c\u4f46\u662f\u4e2d\u95f4\u6ca1\u6709\u4efb\u4f55\u5ef6\u8fdf\uff0c\u6211\u4e0d\u77e5\u9053\u4ed6\u662f\u7528\u4e86\u4ec0\u4e48\u9b54\u6cd5\uff0c\u53ef\u4ee5\u662f\u8f6c\u53d1\uff1f\u53cd\u6b63\u6ca1\u6709\u4efb\u4f55\u5ef6\u8fdf\uff0c\u6211\u6253\u7b97\u5c06\u6211\u7684xbar\u548carbiter\u7684\u5bc4\u5b58\u5668\u5168\u90e8\u62c6\u4e86\u8bd5\u8bd5\uff0c\u8349\uff0c\u6211\u5fd8\u8bb0\u4e86\uff0c\u6211\u62c6\u6389\u5bc4\u5b58\u5668\uff0c\u6211\u7684\u72b6\u6001\u673a\u5c31\u4f1a\u51fa\u73b0\u7ec4\u5408\u903b\u8f91\u56de\u73af\uff0c\u6211\u80fd\u4e0d\u80fd\u505a\u4e00\u4e9b\u8f6c\u53d1\u64cd\u4f5c\u628a\u4fe1\u53f7\u63d0\u524d\u8f6c\u53d1\u51fa\u53bb\uff1f\u6211\u5c31\u8f6c\u53d1\u4e86\u4e00\u4e2aawvalid\u4fe1\u53f7\uff0c\u8ba9\u4ed6\u63d0\u524d\u4e00\u4e2a\u5468\u671f\u51fa\u53bb\uff0c\u7ed3\u679c\u5c31\u6210\u529f\u4e86\uff1f\u597d\u5947\u602a\uff0c\u4f46\u662f\u4e0d\u5e94\u8be5\u6b63\u786e\u7684\uff0c\u6211\u5bf9\u6574\u4e2aaw\u901a\u9053\u4fe1\u53f7\u8fdb\u884c\u4e86\u4e00\u6ce2\u8f6c\u53d1<\/p>\n\n\n\n

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

    \u65e2\u7136\u6211\u53ef\u4ee5\u6210\u529f\u8f6c\u53d1\u800c\u4e0d\u62a5\u7ec4\u5408\u903b\u8f91\u56de\u73af\u9519\u8bef\uff0c\u90a3\u4e48\u6211\u4e4b\u524d\u7684aribter\u548cxbar\u611f\u89c9\u53ef\u4ee5\u8fdb\u884c\u4e00\u6ce2\u91cd\u6784\u554a\uff08\u6211\u4e4b\u524d\u7528\u7684\u662f\u72b6\u6001\u673a\uff0c\u72b6\u6001\u673a\u5c31\u610f\u5473\u7740\u5fc5\u987b\u7ecf\u8fc7\u591a\u4e2a\u5468\u671f\uff0c\u6211\u4e4b\u540e\u7684\u91cd\u6784\u662f\u4e0d\u662f\u53ef\u4ee5\u4e0d\u4f7f\u7528\u72b6\u6001\u673a\uff09<\/p>\n\n\n\n

    \u6210\u529f\u505a\u5230\u7c7b\u4f3c\u6253\u6d1e\u8f6c\u53d1\u7684\u524d\u63d0\u662f\u8f6c\u53d1\u7684\u4fe1\u53f7\u4e0d\u80fd\u548c\u63a7\u5236\u72b6\u6001\u673a\u8f6c\u79fb\u7684\u4fe1\u53f7\u76f8\u540c\uff0c\u5426\u5219\u5c31\u4f1a\u7ec4\u5408\u903b\u8f91\u56de\u73af\uff0c\u8fd9\u5176\u5b9e\u5bfc\u81f4\u4e86\u4e0d\u548c\u72b6\u6001\u673a\u6709\u5173\u7684\u4fe1\u53f7\u8fc7\u53bb\u4e86\uff0c\u4f46\u662f\u63a7\u5236\u72b6\u6001\u673a\u7684\u4fe1\u53f7\u6ca1\u8fc7\u53bb\uff0c\u5bfc\u81f4\u4e0d\u540c\u6b65\u95ee\u9898<\/p>\n\n\n\n

    \u4e8e\u662f\u6211\u5c1d\u8bd5\u5c06xbar\u548carbiter\u5408\u5e76\uff0c\u53d1\u73b0chisel\u6ca1\u6709\u62a5\u9519\uff0c\u4f46\u662fverilator\u62a5\u9519\u4e86\uff0c\u5e76\u4e14\u7ec4\u5408\u903b\u8f91\u56de\u73af\u51fa\u73b0\u5728\u4e00\u5806SoC\u4fe1\u53f7\u4e2d\uff0c\u6211\u5408\u5e76\u7684\u539f\u56e0\u5c31\u662f\u56e0\u4e3axbar\u4f1a\u64cd\u4f5carbiter\u7684\u76ee\u7684\u6570\u636e\u5bfc\u81f4\u56de\u73af\uff0c\u73b0\u5728\u5408\u5e76\u4e4b\u540e\u4e2d\u95f4\u4f9d\u7136\u8fd8\u662f\u6ca1\u6709\u4e00\u4e2a\u5bc4\u5b58\u5668\uff0c\u5bfc\u81f4SoC\u4e2d\u7684\u4ee3\u7801\u64cd\u4f5cxbar\u7684\u76ee\u7684\u6570\u636e\u5bfc\u81f4\u56de\u73af<\/p>\n\n\n\n

    \u6211\u61c2\u4e86\uff0c\u5176\u5b9e\u53ea\u8981soc\u7684\u4fe1\u53f7\u4f20\u56de\u6765\u7684\u4fe1\u53f7\u6ca1\u6709\u5ef6\u8fdf\u5c31\u884c\u554a\uff0c\u609f\u4e86<\/p>\n\n\n\n

    \u6ca1\u6709\u5ef6\u8fdf\u7684\u4fe1\u53f7\u610f\u5473\u7740core\u53ef\u4ee5\u7b2c\u4e00\u65f6\u95f4\u83b7\u53d6\u5230\u4fe1\u53f7\uff0c\u5e76\u4e14\u5b8c\u5168\u6839\u636e\u4fe1\u53f7\u6765\u5728\u5408\u9002\u7684\u65f6\u673a\u53d1\u51fa\u4fe1\u53f7<\/p>\n\n\n\n

    \u8fd8\u662f\u4e0d\u592a\u5bf9\uff0c\u56e0\u4e3acore\u53d1\u51fa\u7684\u4fe1\u53f7\u4f1a\u4ea7\u751f\u5ef6\u8fdf\uff0c\u8fd8\u662f\u4f1a\u4e0d\u540c\u6b65\u5bfc\u81f4\u95ee\u9898\uff0c\u6700\u7ec8\u8fd8\u662f\u901a\u8fc7\u7a0d\u5fae\u6709\u70b9\u4e11\u964b\u7684\u65b9\u5f0f—\u56e0\u4e3a\u5728xbar\u4e2d\u4fe1\u53f7\u4e0d\u5b58\u5728\u5ef6\u8fdf\u6240\u4ee5\u53ef\u4ee5\u8ba9xbar\u6765\u63d2\u624b\u63e1\u624b\u8fc7\u7a0b<\/p>\n\n\n\n

    \u4e4b\u540e\u8fd8\u8fdb\u884c\u4e86\u5f88\u4e45\u7684debug\uff0c\u4ed6\u6709\u4e00\u4e2aaxi\u6a21\u5757\uff0c\u6709\u4e24\u4e2afifo\uff0c\u8fd9\u4e24\u4e2afifo\u662faxi\u8bf7\u6c42\u548csdram\u56de\u590d\u7684\u4e00\u4e2a\u7f13\u5b58\uff0c\u53ef\u80fd\u662f\u4e3a\u4e86\u540c\u6b65\u4e24\u8fb9\u4ee5\u53ca\u652f\u6301burst\u5427\uff0c\u4f46\u662f\u8fd9\u91cc\u5f88\u5bb9\u6613\u51fabug\uff0c\u6211\u751a\u81f3\u53d1\u73b0\u4e86\u4e00\u4e2a\u6211\u505asoc\u65f6\u4fee\u6539\u7684\u63a7\u5236\u5668\u7684bug\uff0c\u4e3b\u8981bug\u5c31\u662f\u4ec0\u4e48valid\u4fe1\u53f7\uff0cack\u4e4b\u7c7b\u7684\u4fe1\u53f7\u5982\u679c\u53ea\u662f\u60f3\u4f20\u8f93\u4e00\u6b21\uff0c\u5c31\u4e0d\u8981\u6301\u7eed\u591a\u4e2a\u5468\u671f\uff0c\u4e0d\u7136\u5c31\u4f1a\u88ab\u5f53\u6210\u591a\u4e2areq\/resp\u4e22\u8fdbfifo\u91cc\u9762<\/p>\n\n\n\n

    \u8fd9\u4e2a\u5730\u65b9debug\u4e86\u8d85\u8fc74\u5929\uff0c\u7ec8\u4e8e\u8fd8\u662f\u5728\u4e2d\u79cb\u8282\u7684\u90a3\u4e00\u5929\u8dd1\u8fc7\u4e86dummy.c<\/p>\n\n\n\n

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

    \u5ffd\u7136\u53d1\u73b0flash\u4e0d\u652f\u6301axi\u7a81\u53d1\u4f20\u8f93…….\uff0c\u6240\u4ee5\u9700\u8981\u5728icache\u4e2d\u5224\u65ad\u73b0\u5728\u7684addr\u662f\u4e0d\u662f\u843d\u5728sdram\u4e2d<\/p>\n\n\n\n

    \u9700\u8981\u7a0d\u5fae\u4fee\u6539\u4e00\u4e0b\u6211\u4e4b\u524d\u5199\u7684sdram\u9897\u7c92\u7684\u5b9e\u73b0\uff0c\u6700\u7ec8\u7684\u6ce2\u5f62\u793a\u610f<\/p>\n\n\n\n

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

    \u5982\u679c\u8981\u4e25\u683c\u505a\u7684\u8bdd\uff0c\u5e94\u8be5\u662far\uff0caw\uff0cw\u901a\u9053\u7684\u63e1\u624b\u5168\u90e8\u8981\u6821\u51c6\uff0c\u6bd4\u5982awready\u88abdelayer\u63a5\u6536\u5230\uff0c\u9700\u8981\u5ef6\u8fdf\u8fd4\u56de\uff0cHowever\uff0c\u4f3c\u4e4e\u5e76\u4e0d\u9700\u8981\u8fd9\u4e48\u505a\uff0c\u8fd9\u51e0\u4e2a\u901a\u9053\u6211\u89c9\u5f97\u5b8c\u5168\u53ef\u4ee5\u76f4\u8fde\uff0c\u53ea\u5c06\u56de\u590d\u7684\u90a3\u51e0\u4e2a\u4fe1\u53f7\u505a\u5ef6\u8fdf\uff0c\u6bd4\u5982bvalid\uff0crvalid\uff0crdata\u7b49\uff0c\u8ba9\u6211\u60f3\u60f3\u8fd9\u6837\u53ef\u4e0d\u53ef\u4ee5\uff0c\u611f\u89c9\u4e25\u683c\u6765\u8bf4\u4e0d\u53ef\u4ee5\u7684\uff0c\u6bd4\u5982\u53ef\u80fdmaster\u63a5\u6536\u5230awready\u624d\u5c06bready\u7f6e1\uff0c\u5982\u679c\u76f4\u8fde\u7684\u8bddbready\u4fe1\u53f7\u4f1a\u66f4\u5feb\u5230\u6765\uff08\u5f53\u7136\u8fd9\u662f\u53ea\u662f\u6253\u4e2a\u6bd4\u65b9\uff09\u4f46\u662f\u771f\u7684\u8fd9\u4e48\u505a\u8fd8\u633a\u9ebb\u70e6\u7684\uff0c\u6bcf\u6b21\u4eceout\u63a5\u6536\u5230\u503c\u90fd\u9700\u8981\u505a\u4e00\u4e2a\u6807\u8bb0\uff0c\u53cd\u6b63\u611f\u89c9\u903b\u8f91\u4f1a\u590d\u6742\u5f88\u591a\u500d<\/p>\n\n\n\n

    \u5199\u7ed9\u660e\u5929\u7684\u6211\uff1a\u6211\u73b0\u5728\u5df2\u7ecf\u628a\u5199\u7684\u901a\u9053\u5ef6\u8fdf\u5dee\u4e0d\u591a\u6821\u51c6\u5b8c\u4e86\uff0c\u8bfb\u9700\u8981\u4e00\u4e2aburst\u903b\u8f91\uff0c\u6211\u5df2\u7ecf\u53ef\u4ee5\u8bb0\u5f55\u6bcf\u4e2aout.r.fire\u7684\u5177\u4f53delay\u4e86\uff0c\u6211\u73b0\u5728\u9700\u8981\u505a\u7684\u662f\u6839\u636e\u8fd9\u4e9b\u6765\u53d1\u51fa\u5bf9in\u7684rvalid\u903b\u8f91<\/p>\n\n\n\n

    \u9047\u5230\u4e86\u4e00\u4e2abug\uff0c\u4e00\u4e2aarvalid\u4fe1\u53f7\u901a\u8fc7\u7b2c\u4e00\u4e2aaxixbar\u65f6\u6ca1\u6709\u628a\u8fd9\u4e2a\u4fe1\u53f7\u4f20\u8fc7\u53bb\uff0c\u8fd9\u4e2axbar\u8fde\u63a5\u4e86sdram\u548cxbar2\uff0c\u4f46\u662f\u5728master\u6709arvalid\u4fe1\u53f7\u65f6\uff0c\u4e24\u4e2aslave\u90fd\u6ca1\u6709\u76f8\u5e94\u7684arvalid\u4fe1\u53f7\uff0c\u4f46\u662faraddr\u786e\u5b9e\u662f\u6b63\u786e\u7684\uff0c\u4e8e\u662f\u6211\u6253\u7b97\u82b1\u4e00\u70b9\u65f6\u95f4\u770b\u4e00\u770brocket-chip\u7684xbar\u5b9e\u73b0\uff08\u5c0f\u5c0f300\u884c\uff0c\u4e0d\u8db3\u4e3a\u60e7\uff09\u3002\u3002\u3002\u3002\u3002\u54ce\uff0c\u6709\u7684300\u884c\u5f88\u7b80\u5355\uff0c\u6709\u7684300\u884c\u786e\u5b9e\u96be\u5982\u767b\u5929\uff0c\u6bcf\u4e00\u53e5\u8bdd\u90fd\u8bfb\u4e0d\u61c2\uff0c\u8fd8\u662f\u7b49\u6211\u591a\u5b66\u5b66scala\u548cchisel\u518d\u6765\u8bfb\u5427\uff08\u9f99\u82af\u676f\u4e4b\u524d\u4e00\u5b9a\u8981\u597d\u597d\u8bfb\u8bfb\u5199\u7684\u597d\u7684chisel\u6e90\u7801\uff09<\/p>\n\n\n\n

    \u4e4b\u540e\u53d1\u73b0\u662f\u6ca1\u6709\u6b63\u786e\u7684\u7f6erlast\uff0c\u901a\u8fc7\u4e0e\u6ca1\u6709delayer\u7684\u505a\u6bd4\u8f83\uff0c\u4e5f\u7b97\u662f\u4e00\u79cddifftest\u4e86<\/p>\n\n\n\n

    \u4e4b\u540e\u7efc\u5408\u9762\u79ef\u7206\u70b8\uff0cicache\u9762\u79ef\u670910w\uff0c\u5217\u4e00\u4e0b\u9762\u79ef<\/p>\n\n\n\n