{"id":1253,"date":"2012-02-14T04:25:33","date_gmt":"2012-02-13T10:25:33","guid":{"rendered":"http:\/\/peta.okechan.net\/blog\/?p=1253"},"modified":"2012-03-14T11:22:10","modified_gmt":"2012-03-14T02:22:10","slug":"xv6%e3%82%bd%e3%83%bc%e3%82%b9%e3%82%b3%e3%83%bc%e3%83%89%e3%83%aa%e3%83%bc%e3%83%87%e3%82%a3%e3%83%b3%e3%82%b0-%e3%81%9d%e3%81%ae8","status":"publish","type":"post","link":"https:\/\/peta.okechan.net\/blog\/archives\/1253","title":{"rendered":"[xv6 #8] Chapter 1 &#8211; The first process &#8211; Paging hardware"},"content":{"rendered":"<p>\u30c6\u30ad\u30b9\u30c8\u306e17\u301c18\u30da\u30fc\u30b8<\/p>\n<h3>\u672c\u6587<\/h3>\n<p>xv6\u306fIntel 80386\u4ee5\u964d\u306ex86\u30d7\u30ed\u30bb\u30c3\u30b5\u3092\u7a4d\u3093\u3060PC\u3067\u52d5\u4f5c\u3059\u308b\u3002<br \/>\n\u305d\u3057\u3066xv6\u306b\u3042\u308b\u591a\u304f\u306e\u30ed\u30fc\u30ec\u30d9\u30eb\u306e\u6a5f\u80fd\uff08\u4f8b\u3048\u3070\u4eee\u60f3\u30e1\u30e2\u30ea\u306e\u5b9f\u88c5\u306a\u3069\uff09\u306f\u3001x86\u5c02\u7528\u3067\u3042\u308b\u3002<br \/>\n\u3053\u306e\u30c6\u30ad\u30b9\u30c8\u3067\u306f\u3001\u8aad\u307f\u624b\u304c\u4f55\u3089\u304b\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u4e0a\u3067\u30de\u30b7\u30f3\u30ec\u30d9\u30eb\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5c11\u3057\u3084\u3063\u305f\u3053\u3068\u304c\u3042\u308b\u3068\u4eee\u5b9a\u3057\u3001x86\u56fa\u6709\u306e\u30a2\u30a4\u30c7\u30a2\u3092\u8aac\u660e\u3059\u308b\u3002<br \/>\n\uff08\u30a2\u30bb\u30f3\u30d6\u30ea\u8a00\u8a9e\u3092\u4f7f\u3063\u305f\u4e8b\u304c\u3042\u308b\u4eba\u3092\u60f3\u5b9a\u3057\u3066\u308b\u307f\u305f\u3044\u3067\u3059\u3002\uff09<br \/>\n\u4ed8\u9332A\u306b\u3001PC\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306e\u6982\u8981\u306b\u3064\u3044\u3066\u624b\u77ed\u306b\u8aac\u660e\u3057\u3066\u3042\u308b\u3002<br \/>\n\uff08\u4ed8\u9332A\u306f\u3001\u5143\u306e\u30c6\u30ad\u30b9\u30c8\u306e\u6700\u5f8c\u306e\u307b\u3046\u306b\u4ed8\u5c5e\u3057\u3066\u307e\u3059\u3002\uff09<\/p>\n<p>x86\u306e\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\uff08virtual address\uff09\u3092\u7269\u7406\u30a2\u30c9\u30ec\u30b9\uff08physical address\uff09\u306b\u5909\u63db\uff08\u3082\u3057\u304f\u306f\u30de\u30c3\u30d7\uff09\u3059\u308b\u305f\u3081\u306b\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u4f7f\u3046\u3002<br \/>\n\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306f\u3001x86\u547d\u4ee4\u304c\u64cd\u4f5c\u3059\u308b\u30a2\u30c9\u30ec\u30b9\u3067\u3001\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30d7\u30ed\u30bb\u30c3\u30b5\u30c1\u30c3\u30d7\u304b\u3089\u30e1\u30a4\u30f3\u30e1\u30e2\u30ea\u306b\u9001\u3089\u308c\u308b\u30a2\u30c9\u30ec\u30b9\u3067\u3042\u308b\u3002<\/p>\n<p>x86\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u8ad6\u7406\u7684\u306a2^20\uff081,048,576\uff09\u500b\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u30a8\u30f3\u30c8\u30ea\uff08page table entries: PTE\uff09\u306e\u914d\u5217\u3067\u3042\u308b\u3002<br \/>\n\u3069\u306ePTE\u3082\u300120\u30d3\u30c3\u30c8\u306e\u7269\u7406\u30da\u30fc\u30b8\u756a\u53f7\uff08physical page number: PPN\uff09\u3068\u3044\u304f\u3064\u304b\u306e\u30d5\u30e9\u30b0\u3092\u542b\u3093\u3067\u3044\u308b\u3002<br \/>\n\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306e\u4e0a\u4f4d20\u30d3\u30c3\u30c8\u3092\u30a4\u30f3\u30c7\u30af\u30b9\u3068\u3057\u3066\u305d\u308c\u306b\u5bfe\u5fdc\u3059\u308bPTE\u3092\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u4e2d\u304b\u3089\u691c\u7d22\u3057\u3001\u898b\u3064\u304b\u3063\u305fPTE\u306b\u4fdd\u6301\u3055\u308c\u3066\u3044\u308bPPN\u3067\u305d\u306e\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306e\u4e0a\u4f4d20\u30d3\u30c3\u30c8\u3092\u7f6e\u304d\u63db\u3048\u308b\u4e8b\u306b\u3088\u3063\u3066\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u3078\u5909\u63db\u3059\u308b\u3002<br \/>\n\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u3001\u4e0b\u4f4d12\u30d3\u30c3\u30c8\u3092\u305d\u306e\u307e\u307e\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u3078\u30b3\u30d4\u30fc\u3059\u308b\u3002<br \/>\n\u5f93\u3063\u3066\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u30014096\uff082^12\uff09\u30d0\u30a4\u30c8\u306e\u5883\u754c\u3092\u3082\u3064\u584a\u3054\u3068\u306e\u4eee\u60f3-\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u5909\u63db\u6a5f\u80fd\u3092OS\u306b\u63d0\u4f9b\u3059\u308b\u3002<br \/>\n\u305d\u306e\u3088\u3046\u306a\u584a\u306f\u30da\u30fc\u30b8\u3068\u547c\u3070\u308c\u308b\u3002<\/p>\n<p>\u56f31-1\u306b\u3042\u308b\u3088\u3046\u306b\u3001\u5b9f\u969b\u306e\u5909\u63db\u306f2\u6bb5\u968e\u3067\u884c\u308f\u308c\u308b\u3002<br \/>\n\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u30012\u5c64\u306e\u30c4\u30ea\u30fc\u3068\u3057\u3066\u7269\u7406\u30e1\u30e2\u30ea\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u3002<br \/>\n\u30c4\u30ea\u30fc\u306e\u30eb\u30fc\u30c8\u306f\u30014096\u30d0\u30a4\u30c8\u306e\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\uff08page directory\uff09\u3067\u3042\u308b\u3002<br \/>\n\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306f\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u30da\u30fc\u30b8\u3092\u53c2\u7167\u3059\u308b\u305f\u3081\u306ePTE\u306e\u3088\u3046\u306a\u3082\u306e\u30921024\u500b\u542b\u3080\u3002<br \/>\n\u3069\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u30da\u30fc\u30b8\u3082\u30011024\u500b\u306e32\u30d3\u30c3\u30c8\u306ePTE\u3092\u542b\u3080\u3002<br \/>\n\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u3001\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u4e2d\u306e\u30a8\u30f3\u30c8\u30ea\u3092\u9078\u3076\u305f\u3081\u306b\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306e\u4e0a\u4f4d10\u30d3\u30c3\u30c8\u3092\u4f7f\u3046\u3002<br \/>\n\u305d\u306e\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30a8\u30f3\u30c8\u30ea\u304c\u6709\u52b9\u306a\u3089\u3001\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u3001\u305d\u306e\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30a8\u30f3\u30c8\u30ea\u304c\u6307\u3057\u793a\u3059\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u30da\u30fc\u30b8\u3092\u53c2\u7167\u3057\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306e\u306e\u6b21\u306e10\u30d3\u30c3\u30c8\u3092\u4f7f\u3044\u3001\u305d\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u304b\u3089PTE\u3092\u9078\u629e\u3059\u308b\u3002<br \/>\n\u3082\u3057\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30a8\u30f3\u30c8\u30ea\u3084PTE\u304c\u7121\u52b9\u306a\u3089\u3001\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u9055\u53cd\uff08fault\uff09\u3092\u767a\u751f\u3055\u305b\u308b\u3002<br \/>\n\uff08\u591a\u5206\u3053\u308c\u304c\u30da\u30fc\u30b8\u30d5\u30a9\u30eb\u30c8\u306a\u306e\u304b\u306a\uff09<br \/>\n\u3053\u306e2\u5c64\u306e\u69cb\u9020\u306f\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306e\u5e83\u3044\u7bc4\u56f2\u304c\u307e\u3060\u30de\u30c3\u30d7\u3055\u308c\u3066\u306a\u3044\u3088\u3046\u306a\u3088\u304f\u3042\u308b\u30b1\u30fc\u30b9\u3067\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u3057\u3066\u30da\u30fc\u30b8\u5168\u4f53\u3092\u7701\u7565\u53ef\u80fd\u306b\u3059\u308b\u3002<\/p>\n<p>\u56f31-1 x86\u4e0a\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb<br \/>\n<a href=\"https:\/\/peta.okechan.net\/blog\/wp-content\/uploads\/2012\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2012-02-13-18.42.54.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/peta.okechan.net\/blog\/wp-content\/uploads\/2012\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2012-02-13-18.42.54.png\" alt=\"\" title=\"xv6figure1-1.\" width=\"568\" height=\"521\" class=\"aligncenter size-full wp-image-1254\" srcset=\"https:\/\/peta.okechan.net\/blog\/wp-content\/uploads\/2012\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2012-02-13-18.42.54.png 568w, https:\/\/peta.okechan.net\/blog\/wp-content\/uploads\/2012\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2012-02-13-18.42.54-300x275.png 300w\" sizes=\"auto, (max-width: 568px) 100vw, 568px\" \/><\/a><\/p>\n<p>\u3069\u306ePTE\u3082\u3001\u95a2\u9023\u4ed8\u3051\u3089\u308c\u305f\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u304c\u5229\u7528\u53ef\u80fd\u304b\u3092\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u4f1d\u3048\u308b\u305f\u3081\u306e\u3001\u30d5\u30e9\u30b0\u30d3\u30c3\u30c8\u3092\u6301\u3063\u3066\u3044\u308b\u3002<br \/>\nPTE_P\u30d5\u30e9\u30b0\u306fPTE\u304c\u6709\u52b9\u304b\u3069\u3046\u304b\u3092\u793a\u3059\u3002<br \/>\n\u3082\u3057\u305d\u308c\u304c\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u305d\u306e\u30da\u30fc\u30b8\u306b\u5bfe\u3059\u308b\u53c2\u7167\u306f\u9055\u53cd\uff08fault\uff09\u3092\u8d77\u3053\u3059\u3002<br \/>\nPTE_W\u30d5\u30e9\u30b0\u306f\u3001\u305d\u306e\u30da\u30fc\u30b8\u306b\u5bfe\u3059\u308b\u66f8\u304d\u8fbc\u307f\u547d\u4ee4\u306e\u767a\u884c\u304c\u8a31\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u5236\u5fa1\u3059\u308b\u3002<br \/>\n\u3082\u3057\u305d\u308c\u304c\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u30c7\u30fc\u30bf\u3082\u3057\u304f\u306f\u547d\u4ee4\u306e\u8aad\u307f\u8fbc\u307f\u3060\u3051\u304c\u8a31\u53ef\u3055\u308c\u308b\u3002<br \/>\nPTE_U\u30d5\u30e9\u30b0\u306f\u3001\u305d\u306e\u30da\u30fc\u30b8\u304c\u30e6\u30fc\u30b6\u30fc\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u4f7f\u7528\u53ef\u80fd\u304b\u3069\u3046\u304b\u3092\u5236\u5fa1\u3059\u308b\u3002<br \/>\n\u3082\u3057\u305d\u308c\u304c\u30af\u30ea\u30a2\u3055\u308c\u3066\u3044\u308c\u3070\u3001\u305d\u306e\u30da\u30fc\u30b8\u306f\u30ab\u30fc\u30cd\u30eb\u306e\u307f\u5229\u7528\u53ef\u80fd\u3068\u306a\u308b\u3002<br \/>\n\u56f31-1\u306bPTE\u306e\u5168\u3066\u306e\u30d5\u30e9\u30b0\u304c\u793a\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<p>\u7528\u8a9e\u306e\u88dc\u8db3\u3002<br \/>\n\u7269\u7406\u30e1\u30e2\u30ea\u3068\u306f\u3001DRAM\u4e0a\u306e\u30b9\u30c8\u30ec\u30fc\u30b8\u30bb\u30eb\u306e\u3053\u3068\u3092\u6307\u3059\u3002<br \/>\n\u7269\u7406\u30e1\u30e2\u30ea\u306f1\u30d0\u30a4\u30c8\u3054\u3068\u306b\u3001\u30a2\u30c9\u30ec\u30b9\uff08\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u3068\u547c\u3070\u308c\u308b\uff09\u3092\u6301\u3064\u3002<br \/>\n\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3002<br \/>\n\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306f\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u3088\u3063\u3066\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3055\u308c\u3001\uff08\u30e1\u30e2\u30ea\u4e0a\u306e\uff09\u30b9\u30c8\u30ec\u30fc\u30b8\u3092\u8aad\u307f\u66f8\u304d\u3059\u308b\u305f\u3081\u306bDRAM\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3078\u9001\u3089\u308c\u308b\u3002<br \/>\n\uff08CPU\u8996\u70b9\u3067\u306f\u3001DRAM\u306b\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u3092\u6295\u3052\u308b\u3068\u305d\u306e\u4e2d\u306e\u30c7\u30fc\u30bf\u304c\u8fd4\u3063\u3066\u304f\u308b\uff09<br \/>\n\u3053\u306e\u8aac\u660e\u306e\u6bb5\u968e\u3067\u306f\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306b\u3064\u3044\u3066\u306e\u307f\u8ff0\u3079\u3066\u3044\u3066\u3001\u4eee\u60f3\u30e1\u30e2\u30ea\u306a\u3069\u306f\u307e\u3060\u95a2\u4fc2\u306a\u3044\u3002<\/p>\n<h3>\u611f\u60f3<\/h3>\n<p>\u3053\u306e\u7bc0\u3092\u4e00\u8a00\u3067\u8868\u3059\u3068\u3001\u300c4KB\u3054\u3068\u306b\u5206\u3051\u3089\u308c\u305f\u30e1\u30e2\u30ea\u9818\u57df\u3092\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u304c\u3069\u3046\u7ba1\u7406\u3059\u308b\u304b\u3068\u3044\u3046\u4e8b\u306e\u8aac\u660e\u300d\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f\u307e\u3060\u3001<a href=\"http:\/\/ja.wikipedia.org\/wiki\/%E3%83%A1%E3%83%A2%E3%83%AA%E7%AE%A1%E7%90%86%E3%83%A6%E3%83%8B%E3%83%83%E3%83%88\" target=\"_blank\">\u30e1\u30e2\u30ea\u7ba1\u7406\u30e6\u30cb\u30c3\u30c8 &#8211; Wikipedia<\/a>\u3092\u898b\u306a\u304c\u3089\u3001\u307e\u3041\u7406\u89e3\u3067\u304d\u305f\u304b\u306a\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u30da\u30fc\u30b8\u304c4KB\u3067\u305d\u308c\u304c2^20\u500b\u307e\u3067\u4f7f\u3048\u307e\u3059\u3002<br \/>\n\u305d\u308c\u3092\u8a08\u7b97\u3059\u308b\u30684GB\u3068\u306a\u308a\u307e\u3059\u3002<br \/>\n32\u30d3\u30c3\u30c8OS\u30fbCPU\uff08\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u62e1\u5f35\u306a\u3057\uff09\u3067\u4f7f\u3048\u308b\u30e1\u30e2\u30ea\u306e\u6700\u5927\u91cf\u306f4GB\u3067\u3057\u305f\u306d\u3002<\/p>\n<p>\u30a2\u30bb\u30f3\u30d6\u30ea\u8a00\u8a9e\u306e\u4f7f\u7528\u7d4c\u9a13\u3092\u8981\u6c42\u3055\u308c\u3066\u308b\u3088\u3046\u3067\u3059\u304c\u300110\u5e74\u4ee5\u4e0a\u524d\u306b\u307b\u3093\u306e\u5c11\u3057\u3084\u3063\u305f\u3060\u3051\u3067\u3001\u4eca\u3067\u306f\u7dba\u9e97\u30b5\u30c3\u30d1\u30ea\u3068\u5fd8\u308c\u3066\u3057\u307e\u3063\u3066\u307e\u3059\u3002<br \/>\n\u3053\u308c\u304b\u3089\u5148\u5927\u4e08\u592b\u3060\u308d\u3046\u304b(\uff1b\u00b4\u0414\uff40)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30c6\u30ad\u30b9\u30c8\u306e17\u301c18\u30da\u30fc\u30b8<\/p>\n<h3>\u672c\u6587<\/h3>\n<p>xv6\u306fIntel 80386\u4ee5\u964d\u306ex86\u30d7\u30ed\u30bb\u30c3\u30b5\u3092\u7a4d\u3093\u3060PC\u3067\u52d5\u4f5c\u3059\u308b\u3002<br \/>\n\u305d\u3057\u3066xv6\u306b\u3042\u308b\u591a\u304f\u306e\u30ed\u30fc\u30ec\u30d9\u30eb\u306e\u6a5f\u80fd\uff08\u4f8b\u3048\u3070\u4eee\u60f3\u30e1\u30e2\u30ea\u306e\u5b9f\u88c5\u306a\u3069\uff09\u306f\u3001x86\u5c02\u7528\u3067\u3042\u308b\u3002<br \/>\n\u3053\u306e\u30c6\u30ad\u30b9\u30c8\u3067\u306f\u3001\u8aad\u307f\u624b\u304c\u4f55\u3089\u304b\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u4e0a\u3067\u30de\u30b7\u30f3\u30ec\u30d9\u30eb\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5c11\u3057\u3084\u3063\u305f\u3053\u3068\u304c\u3042\u308b\u3068\u4eee\u5b9a\u3057\u3001x86\u56fa\u6709\u306e\u30a2\u30a4\u30c7\u30a2\u3092\u8aac\u660e\u3059\u308b\u3002<br \/>\n\uff08\u30a2\u30bb\u30f3\u30d6\u30ea\u8a00\u8a9e\u3092\u4f7f\u3063\u305f\u4e8b\u304c\u3042\u308b\u4eba\u3092\u60f3\u5b9a\u3057\u3066\u308b\u307f\u305f\u3044\u3067\u3059\u3002\uff09<br \/>\n\u4ed8\u9332A\u306b\u3001PC\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306e\u6982\u8981\u306b\u3064\u3044\u3066\u624b\u77ed\u306b\u8aac\u660e\u3057\u3066\u3042\u308b\u3002<br \/>\n\uff08\u4ed8\u9332A\u306f\u3001\u5143\u306e\u30c6\u30ad\u30b9\u30c8\u306e\u6700\u5f8c\u306e\u307b\u3046\u306b\u4ed8\u5c5e\u3057\u3066\u307e\u3059\u3002\uff09<\/p>\n<p>x86\u306e\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\uff08virtual address\uff09\u3092\u7269\u7406\u30a2\u30c9\u30ec\u30b9\uff08physical address\uff09\u306b\u5909\u63db\uff08\u3082\u3057\u304f\u306f\u30de\u30c3\u30d7\uff09\u3059\u308b\u305f\u3081\u306b\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u3092\u4f7f\u3046\u3002<br \/>\n\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306f\u3001x86\u547d\u4ee4\u304c\u64cd\u4f5c\u3059\u308b\u30a2\u30c9\u30ec\u30b9\u3067\u3001\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30d7\u30ed\u30bb\u30c3\u30b5\u30c1\u30c3\u30d7\u304b\u3089\u30e1\u30a4\u30f3\u30e1\u30e2\u30ea\u306b\u9001\u3089\u308c\u308b\u30a2\u30c9\u30ec\u30b9\u3067\u3042\u308b\u3002<\/p>\n<p>x86\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u8ad6\u7406\u7684\u306a2^20\uff081,048,576\uff09\u500b\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u30a8\u30f3\u30c8\u30ea\uff08page table entries: PTE\uff09\u306e\u914d\u5217\u3067\u3042\u308b\u3002<br \/>\n\u3069\u306ePTE\u3082\u300120\u30d3\u30c3\u30c8\u306e\u7269\u7406\u30da\u30fc\u30b8\u756a\u53f7\uff08physical page number: PPN\uff09\u3068\u3044\u304f\u3064\u304b\u306e\u30d5\u30e9\u30b0\u3092\u542b\u3093\u3067\u3044\u308b\u3002<br \/>\n\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306e\u4e0a\u4f4d20\u30d3\u30c3\u30c8\u3092\u30a4\u30f3\u30c7\u30af\u30b9\u3068\u3057\u3066\u305d\u308c\u306b\u5bfe\u5fdc\u3059\u308bPTE\u3092\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u4e2d\u304b\u3089\u691c\u7d22\u3057\u3001\u898b\u3064\u304b\u3063\u305fPTE\u306b\u4fdd\u6301\u3055\u308c\u3066\u3044\u308bPPN\u3067\u305d\u306e\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306e\u4e0a\u4f4d20\u30d3\u30c3\u30c8\u3092\u7f6e\u304d\u63db\u3048\u308b\u4e8b\u306b\u3088\u3063\u3066\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u3078\u5909\u63db\u3059\u308b\u3002<br \/>\n\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u3001\u4e0b\u4f4d12\u30d3\u30c3\u30c8\u3092\u305d\u306e\u307e\u307e\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u3078\u30b3\u30d4\u30fc\u3059\u308b\u3002<br \/>\n\u5f93\u3063\u3066\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u30014096\uff082^12\uff09\u30d0\u30a4\u30c8\u306e\u5883\u754c\u3092\u3082\u3064\u584a\u3054\u3068\u306e\u4eee\u60f3-\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u5909\u63db\u6a5f\u80fd\u3092OS\u306b\u63d0\u4f9b\u3059\u308b\u3002<br \/>\n\u305d\u306e\u3088\u3046\u306a\u584a\u306f\u30da\u30fc\u30b8\u3068\u547c\u3070\u308c\u308b\u3002<\/p>\n<p>\u56f31-1\u306b\u3042\u308b\u3088\u3046\u306b\u3001\u5b9f\u969b\u306e\u5909\u63db\u306f2\u6bb5\u968e\u3067\u884c\u308f\u308c\u308b\u3002<br \/>\n\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306f\u30012\u5c64\u306e\u30c4\u30ea\u30fc\u3068\u3057\u3066\u7269\u7406\u30e1\u30e2\u30ea\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u3002<br \/>\n\u30c4\u30ea\u30fc\u306e\u30eb\u30fc\u30c8\u306f\u30014096\u30d0\u30a4\u30c8\u306e\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\uff08page directory\uff09\u3067\u3042\u308b\u3002<br \/>\n\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306f\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u30da\u30fc\u30b8\u3092\u53c2\u7167\u3059\u308b\u305f\u3081\u306ePTE\u306e\u3088\u3046\u306a\u3082\u306e\u30921024\u500b\u542b\u3080\u3002<br \/>\n\u3069\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u30da\u30fc\u30b8\u3082\u30011024\u500b\u306e32\u30d3\u30c3\u30c8\u306ePTE\u3092\u542b\u3080\u3002<br \/>\n\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u3001\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u4e2d\u306e\u30a8\u30f3\u30c8\u30ea\u3092\u9078\u3076\u305f\u3081\u306b\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306e\u4e0a\u4f4d10\u30d3\u30c3\u30c8\u3092\u4f7f\u3046\u3002<br \/>\n\u305d\u306e\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30a8\u30f3\u30c8\u30ea\u304c\u6709\u52b9\u306a\u3089\u3001\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u3001\u305d\u306e\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30a8\u30f3\u30c8\u30ea\u304c\u6307\u3057\u793a\u3059\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306e\u30da\u30fc\u30b8\u3092\u53c2\u7167\u3057\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306e\u306e\u6b21\u306e10\u30d3\u30c3\u30c8\u3092\u4f7f\u3044\u3001\u305d\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u304b\u3089PTE\u3092\u9078\u629e\u3059\u308b\u3002<br \/>\n\u3082\u3057\u30da\u30fc\u30b8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30a8\u30f3\u30c8\u30ea\u3084PTE\u304c\u7121\u52b9\u306a\u3089\u3001\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306f\u9055\u53cd\uff08fault\uff09\u3092\u767a\u751f\u3055\u305b\u308b\u3002<br \/>\n\uff08\u591a\u5206\u3053\u308c\u304c\u30da\u30fc\u30b8\u30d5\u30a9\u30eb\u30c8\u306a\u306e\u304b\u306a\uff09<br \/>\n\u3053\u306e2\u5c64\u306e\u69cb\u9020\u306f\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306e\u5e83\u3044\u7bc4\u56f2\u304c\u307e\u3060\u30de\u30c3\u30d7\u3055\u308c\u3066\u306a\u3044\u3088\u3046\u306a\u3088\u304f\u3042\u308b\u30b1\u30fc\u30b9\u3067\u3001\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u3057\u3066\u30da\u30fc\u30b8\u5168\u4f53\u3092\u7701\u7565\u53ef\u80fd\u306b\u3059\u308b\u3002<\/p>\n<p>\u56f31-1 x86\u4e0a\u306e\u30da\u30fc\u30b8\u30c6\u30fc\u30d6\u30eb<br \/>\n<a href=\"https:\/\/peta.okechan.net\/blog\/wp-content\/uploads\/2012\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2012-02-13-18.42.54.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/peta.okechan.net\/blog\/wp-content\/uploads\/2012\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2012-02-13-18.42.54.png\" alt=\"\" title=\"xv6figure1-1.\" width=\"568\" height=\"521\" class=\"aligncenter size-full wp-image-1254\" srcset=\"https:\/\/peta.okechan.net\/blog\/wp-content\/uploads\/2012\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2012-02-13-18.42.54.png 568w, https:\/\/peta.okechan.net\/blog\/wp-content\/uploads\/2012\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2012-02-13-18.42.54-300x275.png 300w\" sizes=\"auto, (max-width: 568px) 100vw, 568px\" \/><\/a><\/p>\n<p>\u3069\u306ePTE\u3082\u3001\u95a2\u9023\u4ed8\u3051\u3089\u308c\u305f\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u304c\u5229\u7528\u53ef\u80fd\u304b\u3092\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u4f1d\u3048\u308b\u305f\u3081\u306e\u3001\u30d5\u30e9\u30b0\u30d3\u30c3\u30c8\u3092\u6301\u3063\u3066\u3044\u308b\u3002<br \/>\nPTE_P\u30d5\u30e9\u30b0\u306fPTE\u304c\u6709\u52b9\u304b\u3069\u3046\u304b\u3092\u793a\u3059\u3002<br \/>\n\u3082\u3057\u305d\u308c\u304c\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u305d\u306e\u30da\u30fc\u30b8\u306b\u5bfe\u3059\u308b\u53c2\u7167\u306f\u9055\u53cd\uff08fault\uff09\u3092\u8d77\u3053\u3059\u3002<br \/>\nPTE_W\u30d5\u30e9\u30b0\u306f\u3001\u305d\u306e\u30da\u30fc\u30b8\u306b\u5bfe\u3059\u308b\u66f8\u304d\u8fbc\u307f\u547d\u4ee4\u306e\u767a\u884c\u304c\u8a31\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u5236\u5fa1\u3059\u308b\u3002<br \/>\n\u3082\u3057\u305d\u308c\u304c\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u30c7\u30fc\u30bf\u3082\u3057\u304f\u306f\u547d\u4ee4\u306e\u8aad\u307f\u8fbc\u307f\u3060\u3051\u304c\u8a31\u53ef\u3055\u308c\u308b\u3002<br \/>\nPTE_U\u30d5\u30e9\u30b0\u306f\u3001\u305d\u306e\u30da\u30fc\u30b8\u304c\u30e6\u30fc\u30b6\u30fc\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u4f7f\u7528\u53ef\u80fd\u304b\u3069\u3046\u304b\u3092\u5236\u5fa1\u3059\u308b\u3002<br \/>\n\u3082\u3057\u305d\u308c\u304c\u30af\u30ea\u30a2\u3055\u308c\u3066\u3044\u308c\u3070\u3001\u305d\u306e\u30da\u30fc\u30b8\u306f\u30ab\u30fc\u30cd\u30eb\u306e\u307f\u5229\u7528\u53ef\u80fd\u3068\u306a\u308b\u3002<br \/>\n\u56f31-1\u306bPTE\u306e\u5168\u3066\u306e\u30d5\u30e9\u30b0\u304c\u793a\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<p>\u7528\u8a9e\u306e\u88dc\u8db3\u3002<br \/>\n\u7269\u7406\u30e1\u30e2\u30ea\u3068\u306f\u3001DRAM\u4e0a\u306e\u30b9\u30c8\u30ec\u30fc\u30b8\u30bb\u30eb\u306e\u3053\u3068\u3092\u6307\u3059\u3002<br \/>\n\u7269\u7406\u30e1\u30e2\u30ea\u306f1\u30d0\u30a4\u30c8\u3054\u3068\u306b\u3001\u30a2\u30c9\u30ec\u30b9\uff08\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u3068\u547c\u3070\u308c\u308b\uff09\u3092\u6301\u3064\u3002<br \/>\n\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3002<br \/>\n\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306f\u30da\u30fc\u30b8\u30f3\u30b0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u3088\u3063\u3066\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3055\u308c\u3001\uff08\u30e1\u30e2\u30ea\u4e0a\u306e\uff09\u30b9\u30c8\u30ec\u30fc\u30b8\u3092\u8aad\u307f\u66f8\u304d\u3059\u308b\u305f\u3081\u306bDRAM\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3078\u9001\u3089\u308c\u308b\u3002<br \/>\n\uff08CPU\u8996\u70b9\u3067\u306f\u3001DRAM\u306b\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u3092\u6295\u3052\u308b\u3068\u305d\u306e\u4e2d\u306e\u30c7\u30fc\u30bf\u304c\u8fd4\u3063\u3066\u304f\u308b\uff09<br \/>\n\u3053\u306e\u8aac\u660e\u306e\u6bb5\u968e\u3067\u306f\u3001\u4eee\u60f3\u30a2\u30c9\u30ec\u30b9\u306b\u3064\u3044\u3066\u306e\u307f\u8ff0\u3079\u3066\u3044\u3066\u3001\u4eee\u60f3\u30e1\u30e2\u30ea\u306a\u3069\u306f\u307e\u3060\u95a2\u4fc2\u306a\u3044\u3002<\/p>\n<h3>\u611f\u60f3<\/h3>\n<p>\u3053\u306e\u7bc0\u3092\u4e00\u8a00\u3067\u8868\u3059\u3068\u3001\u300c4KB\u3054\u3068\u306b\u5206\u3051\u3089\u308c\u305f\u30e1\u30e2\u30ea\u9818\u57df\u3092\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u304c\u3069\u3046\u7ba1\u7406\u3059\u308b\u304b\u3068\u3044\u3046\u4e8b\u306e\u8aac\u660e\u300d\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f\u307e\u3060\u3001<a href=\"http:\/\/ja.wikipedia.org\/wiki\/%E3%83%A1%E3%83%A2%E3%83%AA%E7%AE%A1%E7%90%86%E3%83%A6%E3%83%8B%E3%83%83%E3%83%88\" target=\"_blank\">\u30e1\u30e2\u30ea\u7ba1\u7406\u30e6\u30cb\u30c3\u30c8 &#8211; Wikipedia<\/a>\u3092\u898b\u306a\u304c\u3089\u3001\u307e\u3041\u7406\u89e3\u3067\u304d\u305f\u304b\u306a\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u30da\u30fc\u30b8\u304c4KB\u3067\u305d\u308c\u304c2^20\u500b\u307e\u3067\u4f7f\u3048\u307e\u3059\u3002<br \/>\n\u305d\u308c\u3092\u8a08\u7b97\u3059\u308b\u30684GB\u3068\u306a\u308a\u307e\u3059\u3002<br \/>\n32\u30d3\u30c3\u30c8OS\u30fbCPU\uff08\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u62e1\u5f35\u306a\u3057\uff09\u3067\u4f7f\u3048\u308b\u30e1\u30e2\u30ea\u306e\u6700\u5927\u91cf\u306f4GB\u3067\u3057\u305f\u306d\u3002<\/p>\n<p>\u30a2\u30bb\u30f3\u30d6\u30ea\u8a00\u8a9e\u306e\u4f7f\u7528\u7d4c\u9a13\u3092\u8981\u6c42\u3055\u308c\u3066\u308b\u3088\u3046\u3067\u3059\u304c\u300110\u5e74\u4ee5\u4e0a\u524d\u306b\u307b\u3093\u306e\u5c11\u3057\u3084\u3063\u305f\u3060\u3051\u3067\u3001\u4eca\u3067\u306f\u7dba\u9e97\u30b5\u30c3\u30d1\u30ea\u3068\u5fd8\u308c\u3066\u3057\u307e\u3063\u3066\u307e\u3059\u3002<br \/>\n\u3053\u308c\u304b\u3089\u5148\u5927\u4e08\u592b\u3060\u308d\u3046\u304b(\uff1b\u00b4\u0414\uff40)<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[405],"class_list":["post-1253","post","type-post","status-publish","format-standard","hentry","category-tech","tag-xv6"],"_links":{"self":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/posts\/1253","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/comments?post=1253"}],"version-history":[{"count":0,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/posts\/1253\/revisions"}],"wp:attachment":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/media?parent=1253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/categories?post=1253"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/tags?post=1253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}