Revision as of 21:02, 29 October 2007 view source osdev>Alboin Added a relaxed MMU\Page Structure overview ← Older edit		Revision as of 22:56, 29 October 2007 view source osdev>Alboin Slight Correction Newer edit →
Line 35: The structure of the above in computer speak is quite simple. Each entry is the address of it's child. If it's a directory entry, the entry consists of the table's address. Moreover, if it's a table's entry we're talking about, then it's the the address of the mapped physical memory. A short note, however, just to ruin your simplicity. Each entry described above also contains 3several flags. onAs ~~the~~this ~~least~~is ~~significant~~a ~~bits.~~relaxed ~~The~~overview, ~~full~~I'll ~~layout~~only islist the three major asones ~~follows~~here: Bits 31-312: 4kb aligned address of entry Bit 2: User\Supervisor Bit 2: Modified flag - Pages with this set must be copied to disk before deletion. Bit 1: Read\Write Bit 1: Used Flag - While set, the MMU assumes that this page is actively mapped to some physical address. Bit 0: Presence Flag - While set, the MMU will assume that this page is currently in memory.

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