r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 198

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

7. Memory Management Unit (MMU)
Rev.1.00 Jan. 10, 2008 Page 168 of 1658
REJ09B0261-0100
Internal resource access
Figure 7.9 Flowchart of Memory Access Using UTLB (TLB Compatible Mode)
VA is
in P4 area
Data TLB protection
violation exception
Data TLB multiple
Data TLB miss
hit exception
exception
00 or
01
VA is
in P2 area
W
0
1
R/W?
PR?
10
R
CCR.OCE?
CCR.CB?
(Non-cacheable)
Memory access
1
Data access to virtual address (VA)
VA is
in P1 area
0
0 (User)
R/W?
11
R
Initial page write
W
No
exception
0
0
D?
0
VPNs match
in copy-back mode
CCR.OCE?
W
and V = 1
CCR.WT?
Cache access
1
Yes
1
1
R/W?
R
01 or 11
Data TLB protection
violation exception
VA is in P0, U0,
or P3 area
No
No
No
No
0
No
PR?
and (MMUCR.SV = 0 or
in write-through mode
ASIDs match, and
MMUCR.AT = 1
entry matches
Cache access
CCR.OCE = 1
VPNs match,
SR.MD = 0)
Only one
C = 1 and
SR.MD?
SH = 0
V = 1
WT?
W
Yes
Yes
Yes
1 (Privileged)
Yes
1
Yes
R/W?
R
00 or 10