Rev. 2.00, 09/03, page 79 of 690
The object compared varies depending on the page management information (SZ, SH) in the TLB
entry. It also varies depending on whether the system supports multiple virtual memory or single
virtual memory.
The page-size information determines whether VPN (11 to 10) is compared. VPN (11 to 10) is
compared for 1-kbyte pages (SZ = 0) but not for 4-kbyte pages (SZ = 1).
The sharing information (SH) determines whether the PTEH. ASID and the ASID in the TLB
entry are compared. ASIDs are compared when there is no sharing between processes (SH
=
0) but
not when there is sharing (SH
=
1).
When single virtual memory is supported (MMUCR.SV
=
1) and privileged mode is engaged
(SR.MD
=
1), all process resources can be accessed. This means that ASIDs are not compared
when single virtual memory is supported and privileged mode is engaged. The objects of address
comparison are shown in figure 3.10.
SH = 1 or
(SR.MD = 1 and
MMUCR.SV = 1)?
SZ = 0?
SZ = 0?
No
No (4 kbytes)
Yes
Yes (1 kbyte)
No (4 kbytes)
Yes (1 kbyte)
Bits compared:
VPN 31 to 17
VPN 11 to 10
Bits compared:
VPN 31 to 17
Bits compared:
VPN 31 to 17
VPN 11 to 10
ASID 7 to 0
Bits compared:
VPN 31 to 17
ASID 7 to 0
Figure 3.10 Objects of Address Comparison
Summary of Contents for SH7705
Page 2: ......
Page 70: ...Rev 2 00 09 03 page 24 of 690 ...
Page 194: ...Rev 2 00 09 03 page 148 of 690 ...
Page 284: ...Rev 2 00 09 03 page 238 of 690 ...
Page 338: ...Rev 2 00 09 03 page 292 of 690 ...
Page 354: ...Rev 2 00 09 03 page 308 of 690 ...
Page 374: ...Rev 2 00 09 03 page 328 of 690 ...
Page 420: ...Rev 2 00 09 03 page 374 of 690 ...
Page 476: ...Rev 2 00 09 03 page 430 of 690 ...
Page 482: ...Rev 2 00 09 03 page 436 of 690 ...
Page 552: ...Rev 2 00 09 03 page 506 of 690 ...
Page 630: ...Rev 2 00 09 03 page 584 of 690 ...
Page 739: ...SH7705 Group Hardware Manual REJ09B0082 0200O ...