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4-18 Vol. 3
PAGING
processor ignores bits 63:1, and there is no mapping for the 1-GByte region
controlled by PDPTEi. A reference using a linear address in this region causes a
page-fault exception (see Section 4.7).
• If the P flag of PDPTEi is 1, 4-KByte naturally aligned page directory is located at
the physical address specified in bits 51:12 of PDPTEi (see Table 4-8 in Section
Figure 4-5. Linear-Address Translation to a 4-KByte Page using PAE Paging
Figure 4-6. Linear-Address Translation to a 2-MByte Page using PAE Paging
0
Directory
Table
Offset
Page Directory
PDE with PS=0
Page Table
PTE
4-KByte Page
Physical Address
31 20 111221
Linear Address
PDPTE value
30 29
PDPTE Registers
Directory Pointer
2
9
12
9
40
40
40
0
Directory
Offset
Page Directory
PDE with PS=1
2-MByte Page
Physical Address
31 2021
Linear Address
PDPTE value
30 29
PDPTE Registers
Directory
Pointer
2
9
21
31
40