HD6417750RF240DV Datasheet, PDF (146/1132 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7750 Series

Section 3 Memory Management Unit (MMU)
SH7750, SH7750S, SH7750R Group
MMUCR
31
26 25 24 23
18 17 16 15
10 9 8 7
3210
LRUI
—
URB
—
URC
SV
—
TI — AT
Entry specification
SQMD
PTEH
31
VPN
10 9 8 7
—
0
ASID
PTEL
31 29 28
10 9 8 7 6 5 4 3 2 1 0
—
PPN
— V SZ PR SZ C D SHWT
PTEA
31
432 0
—
TC SA
Write
Entry 0
Entry 1
Entry 2
ASID [7:0] VPN [31:10] V
ASID [7:0] VPN [31:10] V
ASID [7:0] VPN [31:10] V
PPN [28:10] SZ [1:0] SH C PR [1:0] D WT SA [2:0] TC
PPN [28:10] SZ [1:0] SH C PR [1:0] D WT SA [2:0] TC
PPN [28:10] SZ [1:0] SH C PR [1:0] D WT SA [2:0] TC
Entry 63 ASID [7:0] VPN [31:10] V PPN [28:10] SZ [1:0] SH C PR [1:0] D WT SA [2:0] TC
UTLB
Figure 3.12 Operation of LDTLB Instruction
3.5.4 Hardware ITLB Miss Handling
In an instruction access, the SH-4 searches the ITLB. If it cannot find the necessary address
translation information (i.e. in the event of an ITLB miss), the UTLB is searched by hardware, and
if the necessary address translation information is present, it is recorded in the ITLB. This
procedure is known as hardware ITLB miss handling. If the necessary address translation
information is not found in the UTLB search, an instruction TLB miss exception is generated and
processing passes to software.
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R01UH0456EJ0702 Rev. 7.02
Sep 24, 2013