7.4. Level 1 Descriptor

The Level 1 Descriptor returned is either a Page Table Descriptor or a Section Descriptor, and its format varies accordingly. Figure 7.4 illustrates the format of Level 1 Descriptors.

Figure 7.3. Level 1 Descriptors

The two least significant bits indicate the descriptor type and validity, and are interpreted as shown below.

Table 7.2. Interpreting Level 1 Descriptor bits [1:0]

ValueMeaningNotes
0 0InvalidGenerates a Section Translation Fault
0 1PageIndicates that this is a Page Descriptor
1 0SectionIndicates that this is a Section Descriptor
1 1ReservedReserved for future use
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