HD6417751 Datasheet, PDF (113/1105 Pages) Renesas Technology Corp – SuperH RISC engine

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
10 9 8 7
0
VPN
—
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 SH7751 Series 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.
Rev. 3.0, 04/02, page 73 of 1064