{"id":1495,"date":"2010-10-01T11:48:57","date_gmt":"2010-10-01T03:48:57","guid":{"rendered":"http:\/\/edsionte.com\/techblog\/?p=1495"},"modified":"2011-11-03T10:59:50","modified_gmt":"2011-11-03T02:59:50","slug":"%e4%bb%80%e4%b9%88%e6%98%af%e4%b8%ad%e6%96%ad%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/edsionte.com\/techblog\/archives\/1495","title":{"rendered":"\u4ec0\u4e48\u662f\u4e2d\u65ad\uff1f"},"content":{"rendered":"<p><strong><em><span style=\"color: #ff0000;\">Last Update:2011\/11\/03<\/span><\/em><\/strong><\/p>\n<p>\u6211\u4eec\u7ecf\u5e38\u542c\u5230\u4e2d\u65ad\u8fd9\u4e2a\u8bcd\uff0c\u5230\u5e95\u4ec0\u4e48\u662f\u4e2d\u65ad\uff1f\u5728\u8fd9\u4e4b\u524d\u6211\u5148\u8bb2\u7ed9\u5927\u5bb6\u4e00\u4e2a\u6545\u4e8b\u3002<\/p>\n<p><em><strong>\u4ece\u524d\u6709\u4e24\u4f4d\u73ed\u4e3b\u4efbA\u548cB\uff0cA\u8001\u5e08\u5e26\u4e00\u73ed\uff0cB\u8001\u5e08\u5e26\u4e8c\u73ed\u3002\u8fd9\u4e24\u4f4d\u8001\u5e08\u5e73\u65f6\u90fd\u5f88\u5fd9\uff0c\u5e73\u65f6\u9664\u4e86\u4e3a\u5b66\u751f\u4eec\u5907\u8bfe\u6539\u4f5c\u4e1a\uff0c\u5f53\u67d0\u4e2a\u540c\u5b66\u63d0\u51fa\u95ee\u9898\u65f6\uff0c\u8fd8\u8981\u4e3a\u4ed6\u4eec\u89e3\u7b54\u7591\u95ee\u3002A\u8001\u5e08\u751f\u6015\u9057\u6f0f\u6bcf\u4e00\u4f4d\u540c\u5b66\u63d0\u51fa\u7684\u95ee\u9898\uff0c\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u5c31\u653e\u4e0b\u624b\u5934\u7684\u5de5\u4f5c\uff0c\u4e0d\u65ad\u8f6e\u6d41\u5bfb\u95ee\u6bcf\u4e00\u4f4d\u540c\u5b66\uff1a\u201c\u4f60\u6709\u95ee\u9898\u5417\u201d\u3002\u4e5f\u8bb8\u88ab\u5bfb\u95ee\u7684\u8fd9\u4f4d\u540c\u5b66\u6070\u597d\u6709\u95ee\u9898\u8981\u54a8\u8be2\u8001\u5e08\uff0c\u53ef\u8fd9\u6bd5\u7adf\u662f\u5c11\u6570\uff1b\u800c\u5f53A\u8001\u5e08\u7ee7\u7eed\u6279\u6539\u4f5c\u4e1a\u7684\u65f6\u5019\u53c8\u51fa\u73b0\u4e86\u4e00\u4e9b\u540c\u5b66\u63d0\u51fa\u95ee\u9898\uff0c\u53ef\u662f\u8fd9\u4e2a\u65f6\u5019\u8fd8\u6ca1\u5230A\u8001\u5e08\u8f6e\u6d41\u5bfb\u95ee\u540c\u5b66\u7684\u65f6\u95f4\u3002\u5c31\u8fd9\u6837\uff0cA\u8001\u5e08\u7684\u5b9d\u8d35\u65f6\u95f4\u7ecf\u5e38\u88ab\u6d6a\u8d39\u3002<\/strong><\/em><\/p>\n<p><em><strong>B\u8001\u5e08\u548cA\u8001\u5e08\u6709\u6240\u4e0d\u540c\uff0c\u4ed6\u8ba4\u4e3a\u5b8c\u5168\u6ca1\u6709\u5fc5\u8981\u8fd9\u6837\u6b7b\u677f\u7684\u5bfb\u95ee\u6bcf\u4e00\u4f4d\u540c\u5b66\u662f\u5426\u6709\u95ee\u9898\u3002\u4ed6\u5bf9\u5168\u73ed\u540c\u5b66\u8bf4\uff1a\u201c\u8c01\u6709\u95ee\u9898\u5c31\u4e3b\u52a8\u6765\u627e\u6211\u201c\u3002\u5373\u4fbf\u4ed6\u53ef\u80fd\u6b63\u5728\u6539\u4f5c\u4e1a\uff0c\u4f46\u662f\u5b8c\u5168\u53ef\u4ee5\u6682\u65f6\u653e\u4e0b\u624b\u5934\u90a3\u4e9b\u91cd\u8981\u7684\u5de5\u4f5c\uff0c\u5148\u4e3a\u8fd9\u4f4d\u8ff7\u60d1\u7684\u540c\u5b66\u89e3\u51b3\u95ee\u9898\u3002\u56e0\u6b64\uff0cB\u8001\u5e08\u65e2\u53ef\u4ee5\u6539\u4f5c\u4e1a\uff0c\u53c8\u53ef\u4ee5\u5728\u5b66\u751f\u4e3b\u52a8\u63d0\u51fa\u95ee\u9898\u7684\u65f6\u5019\u4e3a\u90a3\u4e2a\u5b66\u751f\u89e3\u51b3\u95ee\u9898\u3002\u663e\u7136B\u8001\u5e08\u7684\u5de5\u4f5c\u6548\u7387\u6bd4A\u8001\u5e08\u63d0\u9ad8\u4e86\u5f88\u591a\u3002<\/strong><\/em><\/p>\n<p>\u6545\u4e8b\u770b\u61c2\u4e86\uff0c\u90a3\u4e48\u606d\u559c\u4f60\uff0c\u4f60\u4e5f\u61c2\u4e86\u4ec0\u4e48\u662f\u4e2d\u65ad\u3002<\/p>\n<p>\u4e0a\u9762\u7684\u4e24\u4f4d\u8001\u5e08\u5206\u522b\u4ee3\u8868\u7cfb\u7edf\u4e2d\u5bf9\u8bbe\u5907\u8fdb\u884c\u7ba1\u7406\u7684\u4e24\u79cd\u5178\u578b\u7684\u65b9\u5f0f\u3002A\u8001\u5e08\u7684\u90a3\u79cd\u5de5\u4f5c\u65b9\u5f0f\u5c5e\u4e8e\u65e9\u671f\u7684\u7a0b\u5e8f\u67e5\u8be2\u63a7\u5236\u65b9\u5f0f\uff08\u6216\u79f0\u4e3a\u8f6e\u8be2\uff09\uff0c\u5185\u6838\u5b9a\u671f\u5bf9\u8bbe\u5907\u7684\u72b6\u6001\u8fdb\u884c\u67e5\u8be2\uff1b\u800cB\u8001\u5e08\u5219\u5c5e\u4e8e\u4e2d\u65ad\u63a7\u5236\u65b9\u5f0f\uff0cI\/O\u8bbe\u5907\u9700\u8981\u670d\u52a1\u65f6\uff0c\u53ef\u4e3b\u52a8\u5411\u5185\u6838\u53d1\u51fa\u4e2d\u65ad\u8bf7\u6c42\u5e76\u6253\u65adCPU\u5f53\u524d\u6b63\u5728\u6267\u884c\u7684\u4efb\u52a1\u3002\u524d\u8005\u5185\u6838\u4e3a\u4e3b\u52a8\uff1b\u800c\u540e\u8005\u53d8\u5185\u6838\u4e3b\u52a8\u4e3a\u88ab\u52a8\uff0c\u7531\u8bbe\u5907\u4e3b\u52a8\u5411\u5185\u6838\u53d1\u51fa\u4e2d\u65ad\u8bf7\u6c42\u3002<\/p>\n<p>\u4ece\u7269\u7406\u89d2\u5ea6\u6765\u770b\uff0c\u4e2d\u65ad\u8bf7\u6c42\u662f\u7531\u5916\u90e8\u786c\u4ef6\u8bbe\u5907\u4ea7\u751f\u7684\u4e00\u79cd\u7535\u4fe1\u53f7\uff0c\u5916\u90e8\u8bbe\u5907\u9996\u5148\u5c06\u8fd9\u79cd\u7535\u4fe1\u53f7\u53d1\u7ed9\u4e2d\u65ad\u63a7\u5236\u5668\uff0c\u63a5\u7740\u4e2d\u65ad\u63a7\u5236\u5668\u5c06\u6b64\u7535\u4fe1\u53f7\u53d1\u9001\u7ed9CPU\u3002CPU\u68c0\u67e5\u5230\u8be5\u4e2d\u65ad\u4fe1\u53f7\u540e\u518d\u901a\u77e5\u5185\u6838\uff0c\u7136\u540e\u7531\u5185\u6838\u5b8c\u6210\u540e\u7eed\u7684\u4e00\u4e9b\u5217\u5904\u7406\u5de5\u4f5c\u3002\u663e\u7136\uff0c\u5185\u6838\u4e0d\u9700\u8981\u5b9a\u671f\u53bb\u68c0\u67e5\u8bbe\u5907\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86CPU\u5229\u7528\u7387\u3002<\/p>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u7684\u63cf\u8ff0\uff0c\u4f60\u5e94\u8be5\u5bf9\u4e2d\u65ad\u6709\u4e86\u4e00\u4e2a\u5927\u81f4\u7684\u4e86\u89e3\uff0c\u4e0d\u8fc7\u60f3\u8981\u66f4\u5177\u4f53\u7684\u4e86\u89e3\u4e2d\u65ad\u5fc5\u987b\u641e\u6e05\u695a\u4ee5\u4e0b\u7684\u77e5\u8bc6\u70b9\u3002<\/p>\n<p>1.\u4e2d\u65ad\u7684\u5206\u7c7b<\/p>\n<p>\u65e9\u671f\u4ee5\u53ca\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u6240\u8bf4\u7684\u4e2d\u65ad\u5373\u6307\u7531\u5916\u8bbe\u6240\u4ea7\u751f\u7684\u4e2d\u65ad\u3002\u968f\u7740\u8ba1\u7b97\u673a\u7684\u8fc5\u901f\u53d1\u5c55\uff0c\u4e2d\u65ad\u4e0d\u518d\u4ec5\u4ec5\u5c40\u9650\u4e8e\u5916\u90e8\u8bbe\u5907\uff0cCPU\u672c\u8eab\u4e5f\u4f1a\u4ea7\u751f\u4e2d\u65ad\uff0c\u4e0d\u8fc7\u6211\u4eec\u5c06\u8fd9\u79cd\u4e2d\u65ad\u79f0\u4e3a\u5f02\u5e38\u3002<\/p>\n<p>\u5bf9\u4e8ex86\u4f53\u7cfb\u7ed3\u6784\u800c\u8a00\uff0c\u4e2d\u65ad\u53ef\u4ee5\u5206\u4e3a\u4e24\u5927\u7c7b\uff1a\u540c\u6b65\u4e2d\u65ad\u548c\u5f02\u6b65\u4e2d\u65ad\u3002\u540c\u6b65\u4e2d\u65ad\u5373\u6211\u4eec\u4e0a\u9762\u6240\u8bf4\u7684\u5f02\u5e38\uff0c\u5b83\u662f\u7531 CPU \u5728\u6267\u884c\u975e\u6cd5\u547d\u4ee4\u65f6\u6240\u4ea7\u751f\u7684\u3002\u4e4b\u6240\u4ee5\u79f0\u4e3a\u540c\u6b65\uff0c\u662f\u56e0\u4e3a\u8fd9\u79cd\u4e2d\u65ad\u8bf7\u6c42\u4fe1\u53f7\u4e0e\u4ee3\u7801\u6307\u4ee4\u540c\u6b65\u6267\u884c\uff0c\u4e5f\u5c31\u662f\u8bf4\u53ea\u6709\u5728\u4e00\u6761\u6307\u4ee4\u6267\u884c\u5b8c\u6bd5\u540e CPU \u624d\u4f1a\u53d1\u51fa\u4e2d\u65ad\uff0c\u800c\u4e0d\u662f\u53d1\u751f\u5728\u4ee3\u7801\u6307\u4ee4\u6267\u884c\u671f\u95f4\u3002\u800c\u5f02\u6b65\u4e2d\u65ad\u5373\u7531\u5916\u90e8\u8bbe\u5907\u4ea7\u751f\u7684\u4e2d\u65ad\uff0c\u8fd9\u79cd\u4e2d\u65ad\u53ef\u4ee5\u968f\u65f6\u53d1\u751f\uff0c\u4e60\u60ef\u4e0a\uff0c\u6211\u4eec\u5c06\u5f02\u6b65\u4e2d\u65ad\u4ecd\u7136\u79f0\u4e3a\u4e2d\u65ad\u3002<\/p>\n<p>\u4e2d\u65ad\u53ef\u5206\u4e3a\u53ef\u5c4f\u853d\u4e2d\u65ad\uff08Maskable interrupt\uff09\u548c\u4e0d\u53ef\u5c4f\u853d\u4e2d\u65ad\uff08Nomaskable interrupt\uff09\u3002\u5f02\u5e38\u53ef\u5206\u4e3a\u6545\u969c\uff08fault\uff09\u3001\u9677\u9631\uff08trap\uff09\u3001\u7ec8\u6b62\uff08abort\uff09\u4e09\u7c7b\u3002<\/p>\n<p>\u53ef\u5c4f\u853d\u4e2d\u65ad\u4e3b\u8981\u662f\u9488\u5bf9\u5916\u90e8\u8bbe\u5907\u6240\u4ea7\u751f\u7684\u4e2d\u65ad\u4fe1\u53f7\uff0c\u4e0d\u53ef\u5c4f\u853d\u4e2d\u65ad\u4e00\u822c\u662f\u6307\u8ba1\u7b97\u673a\u5185\u90e8\u786c\u4ef6\u4ea7\u751f\u7684\u4e2d\u65ad\u3002\u7531\u4e8e\u5f02\u5e38\u662fCPU\u53d1\u51fa\u7684\u4e2d\u65ad\u4fe1\u53f7\uff0c\u4e0e\u4e2d\u65ad\u63a7\u5236\u5668\uff08\u4e0b\u6587\u6709\u89e3\u91ca\uff09\u65e0\u5173\uff0c\u56e0\u6b64\u5f02\u5e38\u4e0d\u80fd\u88ab\u5c4f\u853d\u3002\u90a3\u4e48\uff0c\u5f02\u5e38\u548c\u4e0d\u53ef\u5c4f\u853d\u4e2d\u65ad\u6709\u4e9b\u76f8\u4f3c\u70b9\uff1a\u5b83\u4eec\u5747\u4e0e\u5916\u90e8\u8bbe\u5907\u65e0\u5173\uff0c\u5e76\u4e14\u5747\u4e0d\u80fd\u88ab\u5c4f\u853d\u3002<\/p>\n<p>2.\u4e2d\u65ad\u63a7\u5236\u5668<\/p>\n<p>\u4e2d\u65ad\u63a7\u5236\u5668\u53ef\u5206\u4e3a\u53ef\u7f16\u7a0b\u4e2d\u65ad\u63a7\u5236\u5668\uff08Programmable Interrupt Controller,PIC\uff09\u548c\u9ad8\u7ea7\u53ef\u7f16\u7a0b\u4e2d\u65ad\u63a7\u5236\u5668\uff08Advanced Programmable Interrupt Controller,APIC\uff09\u3002\u524d\u8005\u4ec5\u53ef\u7528\u4e8e\u5355\u5904\u7406\u5668\uff08Uni-processor\uff09\u5e73\u53f0\uff0c\u540e\u8005\u5219\u53ef\u7528\u4e8e\u591a\u5904\u7406\u5668\uff08Mutiliple Processor\uff09\u5e73\u53f0\u3002<\/p>\n<p><strong>\u4f20\u7edf<\/strong>\u7684PIC\u90fd\u662f\u901a\u8fc7\u4e24\u7247\u7ea7\u8054\u76848259A\u6765\u7ba1\u7406\u548c\u63a7\u523615\u4e2a\u7531\u5916\u90e8\u8bbe\u5907\u6240\u4ea7\u751f\u7684\u4e2d\u65ad\u6e90\u3002\u7531\u4e0b\u56fe\u53ef\u770b\u5230\uff0c\u6bcf\u72478259A\u82af\u7247\u6700\u591a\u53ef\u7ba1\u74068\u4e2a\u4e2d\u65ad\u6e90\u3002\u4f46\u7531\u4e8e\u4e24\u72478259A\u82af\u7247\u7684\u7ea7\u8054\uff0c\u5373\u4ece\u7247\u7684INT\u8f93\u51fa\u7aef\u4e0e\u4e3b\u7247\u76842\u53f7\uff08\u7b2c\u4e09\u6761\u7ebf\uff09\u4e2d\u65ad\u7ebf\u76f8\u8fde\u63a5\uff0c\u6240\u4ee5\u603b\u5171\u53ef\u4ee5\u7ba1\u740615\u4e2a\u4e2d\u65ad\u6e90\u3002<\/p>\n<p><a href=\"http:\/\/edsionte.com\/techblog\/archives\/1495\/linux_kernel_interrupt_manage_05_1024\" rel=\"attachment wp-att-1696\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-1696\" title=\"Linux_kernel_interrupt_manage_05_1024\" src=\"http:\/\/edsionte.com\/techblog\/wordpress\/wp-content\/uploads\/2010\/10\/Linux_kernel_interrupt_manage_05_1024-300x186.png\" alt=\"\" width=\"300\" height=\"186\" srcset=\"http:\/\/edsionte.com\/techblog\/wordpress\/wp-content\/uploads\/2010\/10\/Linux_kernel_interrupt_manage_05_1024-300x186.png 300w, http:\/\/edsionte.com\/techblog\/wordpress\/wp-content\/uploads\/2010\/10\/Linux_kernel_interrupt_manage_05_1024.png 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>\u5916\u8bbe\u548c\u4e2d\u65ad\u63a7\u5236\u5668\u4e0a\u6bcf\u6839\u76f8\u8fde\u7684\u7ebf\u88ab\u79f0\u4e3a\u4e2d\u65ad\u7ebf\uff08\u4e5f\u79f0\u4e3aIRQ\u7ebf\uff09\u3002\u5bf9\u8fd9\u4e9b\u4e2d\u65ad\u7ebf\u8fdb\u884c\u7f16\u53f7\u5c31\u5f62\u6210\u4e86\u4e2d\u65ad\u53f7\u3002IRQn\u7ebf\u6240\u5bf9\u5e94\u7684\u4e2d\u65ad\u53f7\u5373\u4e3an\u3002\u5f53\u5916\u90e8\u8bbe\u5907\u4ea7\u751f\u4e2d\u65ad\u65f6\uff0c\u5c31\u901a\u8fc7\u4e2d\u65ad\u7ebf\u5411\u7cfb\u7edf\u53d1\u51fa\u4e2d\u65ad\u8bf7\u6c42\uff08Interrupt ReQuirement\uff09\u3002\u7531\u4e8e\u4e2d\u65ad\u63a7\u5236\u5668\u53ea\u80fd\u63a7\u523615\u4e2a\u4e2d\u65ad\u6e90\uff0c\u800c\u5982\u4eca\u7684\u5916\u8bbe\u53c8\u65e5\u76ca\u5267\u589e\uff0c\u56e0\u6b64\u5c31\u51fa\u73b0\u4e86\u5bf9\u5404\u5916\u8bbe\u5171\u4eab\u4e00\u6761\u4e2d\u65ad\u7ebf\u7684\u60c5\u51b5\uff0c\u5373\u4e2d\u65ad\u5171\u4eab\uff08\u540e\u6587\u4f1a\u6709\u8be6\u7ec6\u89e3\u91ca\uff09\u3002<\/p>\n<p>\u4e0a\u9762\u5df2\u7ecf\u8bf4\u8fc7\uff0c\u5916\u90e8\u8bbe\u5907\u7684\u4e2d\u65ad\u8bf7\u6c42\u53ef\u4ee5\u88ab\u5c4f\u853d\uff0c\u4f46\u662f\u5177\u4f53\u4f53\u73b0\u5230\u786c\u4ef6\u4e0a\u662f\u5982\u4f55\u505a\u5230\u7684\uff1f\u5728\u6bcf\u4e2a8259A\u82af\u7247\u4e0a\u90fd\u6709\u4e00\u4e2a8\u4f4d\u7684\u4e2d\u65ad\u5c4f\u853d\u5bc4\u5b58\u5668\uff0c\u6bcf\u4e00\u4f4d\u5bf9\u5e94\u4e00\u6761\u4e2d\u65ad\u7ebf\u3002\u5728\u5bf9\u5e94\u4e3a\u4e0a\u7f6e1\u5219\u53ef\u5c4f\u853d\u6b64\u6761\u4e2d\u65ad\u7ebf\uff1b\u76f8\u53cd\u7f6e0\u5219\u53ef\u542f\u52a8\u6b64\u6761\u4e2d\u65ad\u7ebf\u3002<\/p>\n<p><strong>\u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u73b0\u5728\u5927\u591a\u6570\u8ba1\u7b97\u673a\u90fd\u4f7f\u7528\u7684\u662fAPIC\uff0c\u53ef\u4ee5\u901a\u8fc7\u67e5\u770b\/proc\/interrupts\u6587\u4ef6\u83b7\u53d6\u4e2d\u65ad\u63a7\u5236\u5668\u7684\u540d\u79f0\u3002\u4e4b\u6240\u4ee5\u5c06\u4f20\u7edf\u76848259A\u4f5c\u4e3aPIC\u7684\u4e3e\u4f8b\u6765\u5b66\u4e60\uff0c\u6700\u5927\u7684\u539f\u56e0\u8fd8\u662f\u56e0\u4e3a\u5b83\u975e\u5e38\u7684\u7ecf\u5178\uff0c\u5c31\u5982\u540c\u53e4\u8463\u2014\u20148086\u5904\u7406\u5668\u4e00\u6837\u3002\u901a\u8fc7\u67e5\u770b\/proc\/interrupts\u6587\u4ef6\uff0c\u53ef\u4ee5\u53d1\u73b0APIC\u7684\u4e2d\u65ad\u53f7\u5e76\u4e0d\u6b6215\u4e2a\uff08\u4f46\u5373\u4fbf\u662f\u8fd9\u6837\uff0c\u8fd8\u9700\u8981\u5171\u4eab\u4e2d\u65ad\uff09\u3002<\/strong><\/p>\n<p>3.\u4e2d\u65ad\u5411\u91cf<\/p>\n<p>x86\u4f53\u7cfb\u7ed3\u6784\u652f\u6301256\u79cd\u4e2d\u65ad\uff0c\u5373256\u4e2a\u4e2d\u65ad\u6e90\u3002\u5c06\u8fd9\u4e9b\u4e2d\u65ad\u6e90\u6309\u71670\u5230255\u7684\u987a\u5e8f\u5bf9\u6bcf\u79cd\u4e2d\u65ad\u8fdb\u884c\u7f16\u53f7\uff0c\u8fd9\u4e2a\u7f16\u53f7\u53eb\u505a\u4e2d\u65ad\u5411\u91cf\uff0c\u901a\u5e38\u4f7f\u75288\u4f4d\u65e0\u7b26\u53f7\u6574\u6570\u6765\u5b58\u50a8\u8fd9\u4e2a\u5411\u91cf\u3002\u4e2d\u65ad\u53f7\u548c\u4e2d\u65ad\u5411\u91cf\u5b58\u5728\u4e00\u5bf9\u4e00\u7684\u6620\u5c04\u5173\u7cfb\u3002<\/p>\n<p>\u4e2d\u65ad\u53f7\u548c\u4e2d\u65ad\u5411\u91cf\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u6982\u5ff5\u3002\u5f53I\/O\u8bbe\u5907\u628a\u4e2d\u65ad\u4fe1\u53f7\u53d1\u9001\u7ed9\u4e2d\u65ad\u63a7\u5236\u5668\u65f6\uff0c\u4e0e\u4e4b\u5173\u8054\u7684\u662f\u4e00\u4e2a\u4e2d\u65ad\u53f7\uff1b\u800c\u5f53\u4e2d\u65ad\u63a7\u5236\u5668\u5c06\u8be5\u4e2d\u65ad\u4fe1\u53f7\u4f20\u9012\u7ed9CPU\u65f6\uff0c\u4e0e\u4e4b\u5173\u8054\u7684\u662f\u4e00\u4e2a\u4e2d\u65ad\u5411\u91cf\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e2d\u65ad\u53f7\u662f\u4ee5\u4e2d\u65ad\u63a7\u5236\u5668\u7684\u89d2\u5ea6\u800c\u8a00\u7684\uff1b\u800c\u4e2d\u65ad\u5411\u91cf\u5219\u662f\u4ee5CPU\u7684\u89d2\u5ea6\u800c\u8a00\u7684\u3002\u4e2d\u65ad\u53f7\u548c\u4e2d\u65ad\u5411\u91cf\u5b58\u5728\u4e00\u5bf9\u4e00\u7684\u6620\u5c04\u5173\u7cfb\u3002<\/p>\n<p>\u901a\u5e38\uff0cIntel\u5c06\u7f16\u53f7\u4e3a0\uff5e31\u7684\u5411\u91cf\u5206\u914d\u7ed9\u5f02\u5e38\u548c\u975e\u5c4f\u853d\u4e2d\u65ad\uff0c\u8fd9\u90e8\u5206\u5411\u91cf\u662f\u56fa\u5b9a\u7684\u3002\u56e0\u6b64\u57288259A\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u4e2d\u65ad\u53f7n\u6240\u5bf9\u5e94\u7684\u4e2d\u65ad\u5411\u91cf\u4e3an+32\u3002<\/p>\n<p>4.\u4e2d\u65ad\u670d\u52a1\u4f8b\u7a0b<\/p>\n<p>\u5728\u54cd\u5e94\u4e00\u4e2a\u5177\u4f53\u7684\u4e2d\u65ad\u65f6\uff0c\u5185\u6838\u4f1a\u6267\u884c\u4e00\u4e2a\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u88ab\u79f0\u4e3a\u4e2d\u65ad\u670d\u52a1\u4f8b\u7a0b\uff08Interrupt Service Routine\uff0cISR\uff09\u3002\u6bcf\u4e00\u4e2a\u8bbe\u5907\u7684\u9a71\u52a8\u7a0b\u5e8f\u4e2d\u90fd\u4f1a\u5b9a\u4e49\u76f8\u5173\u7684\u4e2d\u65ad\u670d\u52a1\u4f8b\u7a0b\u3002\u4ece\u4e0b\u9762\u7684\u4ee3\u7801\u53ef\u4ee5\u770b\u5230\uff0c\u4e2d\u65ad\u670d\u52a1\u4f8b\u7a0b\u6709\u4e24\u4e2a\u53c2\u6570\uff0c\u5206\u522b\u4e3aint\u578b\u548cvoid\u6307\u9488\u578b\u3002\u5e76\u4e14\u8fd4\u56de\u503c\u4e3airqreturn_t\u3002<\/p>\n<pre class=\"brush:c\"> \/\/linux\/include\/linux\/interrupt.h\r\n  98typedef irqreturn_t (*irq_handler_t)(int, void *);\r\n \/\/linux\/include\/linux\/irqreturn.h\r\n  10enum irqreturn {\r\n  11        IRQ_NONE,\r\n  12        IRQ_HANDLED,\r\n  13        IRQ_WAKE_THREAD,\r\n  14};\r\n  15\r\n  16typedef enum irqreturn irqreturn_t;<\/pre>\n<p>\u7531\u4e8eirqreturn_t\u662f\u4e00\u4e2a\u679a\u4e3e\u7c7b\u578b\uff0c\u56e0\u6b64\u672c\u8d28\u4e0a\u4e3a\u6574\u5f62\u3002\u5e76\u4e14IRQ_NONE,IRQ_HANDLED,IRQ_WAKE_THREAD\u7684\u503c\u4e00\u6b21\u4e3a0\uff0c1\uff0c2\u3002IRQ_NONE\u8868\u793a\u4e0d\u5904\u7406\u6240\u6536\u5230\u7684\u4e2d\u65ad\u8bf7\u6c42\uff1bIRQ_HANDLED\u8868\u793a\u63a5\u6536\u5230\u4e86\u6709\u6548\u7684\u4e2d\u65ad\u8bf7\u6c42\uff0c\u5e76\u4e14\u4f5c\u51fa\u4e86\u6b63\u786e\u7684\u5904\u7406\uff08\u8fd9\u4e00\u70b9\u5728\u540e\u6587\u4e2d\u6709\u8be6\u7ec6\u8ba8\u8bba\uff09\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5f53\u4e00\u4e2a\u4e2d\u65ad\u670d\u52a1\u4f8b\u7a0b\u6b63\u5728\u6267\u884c\u7684\u65f6\u5019\uff0c\u8be5\u4e2d\u65ad\u6240\u5728\u6240\u6709\u5904\u7406\u5668\u4e0a\u7684\u90fd\u4f1a\u88ab\u5c4f\u853d\uff0c\u4ee5\u514d\u7ee7\u7eed\u63a5\u53d7\u540c\u4e00\u6761\u4e2d\u65ad\u7ebf\u4e0a\u7684\u53e6\u4e00\u4e2a\u65b0\u7684\u4e2d\u65ad\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5173\u4e8e\u4e2d\u65ad\u7684\u57fa\u672c\u6982\u5ff5\uff0c\u4e86\u89e3\u4e86\u5b83\u4eec\u5c31\u5bb9\u6613\u8fdb\u884c\u540e\u7eed\u7684\u4e2d\u65ad\u5206\u6790\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Last Update:2011\/11\/03 \u6211\u4eec\u7ecf\u5e38\u542c\u5230\u4e2d\u65ad\u8fd9\u4e2a\u8bcd\uff0c\u5230\u5e95\u4ec0\u4e48\u662f\u4e2d\u65ad\uff1f\u5728\u8fd9\u4e4b\u524d\u6211\u5148\u8bb2\u7ed9\u5927\u5bb6\u4e00\u4e2a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[110],"tags":[134,108,157,403],"class_list":["post-1495","post","type-post","status-publish","format-standard","hentry","category-linux","tag-kernel","tag-linux","tag-157","tag-403"],"views":15306,"_links":{"self":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/1495","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/comments?post=1495"}],"version-history":[{"count":0,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/1495\/revisions"}],"wp:attachment":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/media?parent=1495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/categories?post=1495"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/tags?post=1495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}