r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 199

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

Figure 7.10 shows a flowchart of a memory access using the ITLB.
Internal resource access
Figure 7.10 Flowchart of Memory Access Using ITLB (TLB Compatible Mode)
VA is
in P4 area
Hardware ITLB
miss handling
Record in ITLB
VA is
in P2 area
Instruction TLB protection
0
Yes
Instruction access to virtual address (VA)
violation exception
Instruction TLB
miss exception
Search UTLB
CCR.ICE?
Match?
(Non-cacheable)
Memory access
No
1
VA is
in P1 area
No
0
No
multiple hit exception
and CCR.ICE = 1
Instruction TLB
Cache access
VPNs match
and V = 1
1
C = 1
PR?
Rev.1.00 Jan. 10, 2008 Page 169 of 1658
Yes
Yes
0 (User)
7. Memory Management Unit (MMU)
VA is in P0, U0,
or P3 area
No
No
No
No
and (MMUCR.SV = 0 or
ASIDs match, and
MMUCR.AT = 1
entry matches
VPNs match,
SR.MD = 0)
SR.MD?
Only one
SH = 0
V = 1
REJ09B0261-0100
Yes
1 (Privileged)
Yes
Yes
Yes