12.4.1. AArch64 descriptor format

You can use the descriptor format in all levels of table, from level 0 to level 3. Level 0 descriptors can only output the address of a level 1 table. Level 3 descriptors cannot point to another table and can only output block addresses. The format of the table is therefore slightly different for level 3.

Figure 12.10 shows that the table descriptor type is identified by bits 1:0 of the entry and can refer to either:

Figure 12.10. A64 Table descriptor type

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For purposes of clarity, this diagram does not specify the width of bit fields.

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