{"rsdb":{"rid":"301782","subhead":"","postdate":"0","aid":"217027","fid":"54","uid":"1","topic":"1","content":"

local_irq_disable\u7684\u529f\u80fd\u662f\u5c4f\u853d\u5f53\u524dCPU\u4e0a\u7684\u6240\u6709\u4e2d\u65ad\uff0c\u901a\u8fc7\u64cd\u4f5carm\u6838\u5fc3\u4e2d\u7684\u5bc4\u5b58\u5668\u6765\u5c4f\u853d\u5230\u8fbeCPU\u4e0a\u7684\u4e2d\u65ad\uff0c\u6b64\u65f6\u4e2d\u65ad\u63a7\u5236\u5668\u4e2d\u6240\u6709\u9001\u5f80\u8be5CPU\u4e0a\u7684\u4e2d\u65ad\u4fe1\u53f7\u90fd\u5c06\u88ab\u5ffd\u7565\u3002<\/p>

Kernel\/arch\/arm\/include\/asm\/irqflag.h<\/code><\/p>

kernel\/include\/linux\/irqflags.h<\/code><\/p>

\u5728\u5168\u5c40\u8303\u56f4\u5185\u5c4f\u853d\u67d0\u4e00\u4e2a\u4e2d\u65ad\u53f7\uff08irq num\uff09\u3002\u8be5irq num\u5bf9\u5e94\u7684irq handler\u4e0d\u4f1a\u5728\u4efb\u4f55\u4e00\u4e2aCPU\u4e0a\u6267\u884c\u3002\u8fd9\u4e2a\u64cd\u4f5c\u662f\u901a\u8fc7\u8bbe\u7f6e\u4e2d\u65ad\u63a7\u5236\u5668\u4e2d\u7684\u5bc4\u5b58\u5668\u6765\u5bf9\u6307\u5b9a\u4e2d\u65ad\u8fdb\u884c\u5c4f\u853d\uff0c\u800c\u5176\u4ed6\u672a\u5c4f\u853d\u7684\u4e2d\u65ad\u4f9d\u7136\u53ef\u4ee5\u6b63\u5e38\u9001\u5f80CPU\u3002<\/p>

chip.c<\/code><\/p>

\u4e00\u4e2a\u4e2d\u65ad\u5904\u7406\u7684\u6d41\u7a0b\u662f\u8fd9\u6837\u7684\uff1a<\/p>

\u6211\u4eec\u9700\u8981\u5728irq_handler\u4e2d\u505a\u5982\u4e0b\u5904\u7406\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u4e00\u4e2a\u542f\u52a8\u4e0b\u534a\u90e8softirq\u7684\u64cd\u4f5c\uff08\u53ef\u9009\uff09\u3002<\/p>

\u5728\u4ee3\u7801\u4e2d\uff0c\u662f\u8fd9\u6837\u7684\u8c03\u7528\u6d41\u7a0b\uff1a<\/p>

\u5177\u4f53\u53ef\u4ee5\u53c2\u8003\u8717\u7a9d\u4e0a\u7684\u6587\u7ae0\uff0c\u5bf9\u4e24\u79cd\u573a\u666f\u6709\u6bd4\u8f83\u8be6\u7ec6\u7684\u4ecb\u7ecd\u3002\u6211\u4eec\u63a5\u4e0b\u6765\u8ba8\u8bba\u7535\u5e73\u89e6\u53d1\u7684\u573a\u666f\uff0c\u6765\u770b\u770b\u5982\u4f55\u5728\u6240\u6709CPU\u4e0a\u8fdb\u884c\u5c4f\u853d\u4e2d\u65ad\u7684\u3002\u5176\u4ed6\u573a\u666f\u53ef\u4ee5\u4e3e\u4e00\u53cd\u4e09\u3002<\/p>

\u4ece\u4ee3\u7801\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u51fd\u6570\u4e2d\u9996\u5148\u505a\u7684\u5c31\u662fmask_ack_irq\uff0c\u5728\u5176\u4e2d\u4f1a\u8c03\u7528chip\u4e2d\u7684\u56de\u8c03\u6765\u8bbe\u7f6e\u786c\u4ef6\u3002<\/p>

\u8be5\u51fd\u6570\u4e2d\u8c03\u7528\u7684\u5c31\u662fchip\u4e2d\u7684irq_mask\u548cirq_ack\u6765\u64cd\u4f5cchip\u4e2d\u7684\u5bc4\u5b58\u5668.\u5176\u4e2d\u7684irqd_irq_disabled\u5c31\u662f\u7528\u6765\u5224\u65ad\u8be5\u4e2d\u65ad\u662f\u5426\u88ab\u5176\u4ed6CPU\u7ed9disable\u4e86\uff0c\u8fd9\u91cc\u7684disable\u5c31\u662f\u8c03\u7528disable_irq\u51fd\u6570\u6765\u505a\u7684\uff0c\u7531\u6b64\u53ef\u89c1\uff0c\u4f7f\u7528disable_irq\u4f1a\u5728\u6240\u6709\u7684CPU\u4e0a\u628a\u4e2d\u65ad\u53f7\u7ed9\u5c4f\u853d\u6389\u3002<\/p>

\u5f53\u5728\u4e00\u4e2aCPU\u4e0a\u8c03\u7528\u4e86disable_irq\u7684\u65f6\u5019\uff0c\u53ef\u80fd\u53e6\u4e00\u4e2aCPU\u5df2\u7ecf\u63a5\u6536\u4e86\u4e2d\u65ad\u4e86\uff0c\u4f46\u662f\u5728handler\u7684\u5904\u7406\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u5b83\u4f1a\u5224\u65ad\u662f\u5426\u88ab\u5176\u5b83CPU disable\u4e86\uff0c\u5982\u679cdisable\u4e86\uff0c\u5b83\u4f1a\u628a\u8fd9\u4e2a\u4e2d\u65ad\u6807\u5fd7\u8bbe\u7f6e\u4e3aIRQS_PENDING\uff0c\u4f46\u5e76\u4e0d\u4f1a\u53bb\u6267\u884cirq handler\uff0c\u800c\u662f\u76f4\u63a5\u9000\u51fa\uff0c\u6b64\u65f6\u4e5f\u6ca1\u6709\u8c03\u7528unmask\u51fd\u6570\uff0c\u7531\u6b64\u5c31\u5c4f\u853d\u4e86\u8be5\u4e2d\u65ad\uff0c\u6ce8\u610f\u8fd9\u91cc\u7684mask\u548cack\u53ea\u662f\u5bf9\u4e8e\u4e2d\u65ad\u63a7\u5236\u5668\u5230CPU\u4e0a\u7684\u4fe1\u53f7\u8fdb\u884c\u4e86\u5c4f\u853d\uff0c\u800c\u5916\u8bbe\u5230\u4e2d\u65ad\u63a7\u5236\u5668\u4e0a\u7684\u4e2d\u65ad\u4fe1\u53f7\u5e76\u6ca1\u6709\u6d88\u5931\u3002<\/p>

\u800c\u5728\u4f7f\u80fd\u4e2d\u65ad\u51fd\u6570enable_irq\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5b83\u4f1a\u8c03\u7528unmask\u6765\u53d6\u6d88\u8be5\u4e2d\u65ad\u7684\u5c4f\u853d\u3002\u7531\u4e8e\u662f\u7535\u5e73\u89e6\u53d1\uff0c\u6240\u4ee5\u5f53unmask\u540e\uff0c\u4e2d\u65ad\u63a7\u5236\u5668\u7acb\u523b\u5c31\u4f1a\u611f\u77e5\u5230\u5916\u8bbe\u4e0a\u7684\u4e2d\u65ad\u4fe1\u53f7\u3002\u7531\u6b64\u8fdb\u5165\u4e2d\u65ad\u5904\u7406\u6d41\u7a0b\u3002<\/p>","orderid":"0","title":"\u5173\u4e8elocal_irq_disable\u548cdisable_irq\u7684\u533a\u522b","smalltitle":"","mid":"0","fname":"linux\u7f16\u7a0b\u57fa\u7840","special_id":"0","bak_id":"0","info":"0","hits":"134","pages":"1","comments":"0","posttime":"2019-04-02 22:08:47","list":"1554214127","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"\u5173\u4e8e<\/A> local_irq_disable<\/A> disable_irq<\/A> \u533a\u522b<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"47.106.78.186","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"\u5173\u4e8elocal_irq_disable\u548cdisable_irq\u7684\u533a\u522b","lastview":"1713924680","digg_num":"0","digg_time":"0","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}