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modify the bits layout

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mudongliang 2016-01-09 21:40:46 +08:00
parent f4a0f1b918
commit 86fc1ceadd
1 changed files with 2 additions and 2 deletions
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Theory/Paging.md
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@ -114,10 +114,10 @@ Every access to a linear address is either a supervisor-mode access or a user-mo
Where:
* 63 bit - N/X bit (No Execute Bit) - presents ability to execute the code from physical pages mapped by the table entry;
* 63 bit - N/X bit (No Execute Bit) which presents ability to execute the code from physical pages mapped by the table entry;
* 62:52 bits - ignored by CPU, used by system software;
* 51:12 bits - stores physical address of the lower level paging structure;
* 12:9 bits - ignored by CPU;
* 11:9 bits - ignored by CPU;
* MBZ - must be zero bits;
* Ignored bits;
* A - accessed bit indicates was physical page or page structure accessed;