SH7750_08 Datasheet, PDF (171/1162 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

• 1-Kbyte page
Virtual address
31
10 9
0
VPN
Offset
Section 3 Memory Management Unit (MMU)
Physical address
28
10 9
0
PPN
Offset
• 4-Kbyte page
Virtual address
31
12 11
0
VPN
Offset
Physical address
28
12 11
0
PPN
Offset
• 64-Kbyte page
Virtual address
31
16 15
0
VPN
Offset
Physical address
28
16 15
0
PPN
Offset
• 1-Mbyte page
Virtual address
31
20 19
0
VPN
Offset
Physical address
28
20 19
0
PPN
Offset
Figure 3.8 Relationship between Page Size and Address Format
• VPN: Virtual page number
For 1-Kbyte page: upper 22 bits of virtual address
For 4-Kbyte page: upper 20 bits of virtual address
For 64-Kbyte page: upper 16 bits of virtual address
For 1-Mbyte page: upper 12 bits of virtual address
• ASID: Address space identifier
Indicates the process that can access a virtual page.
In single virtual memory mode and user mode, or in multiple virtual memory mode, if the SH
bit is 0, this identifier is compared with the ASID in PTEH when address comparison is
performed.
Rev.7.00 Oct. 10, 2008 Page 87 of 1074
REJ09B0366-0700