Section 7 Memory Management Unit (MMU)
Rev.1.00 Dec. 13, 2005 Page 192 of 1286
REJ09B0158-0100
VPN[31:30] is 10 or not. When an entry from the PMB is recorded in the ITLB, H
′
00, 01, and
1 are recorded in the ASID, PR, and SH fields which do not exist in the PMB, respectively.
7.7.5 Memory-Mapped
PMB
Configuration
To enable the PMB to be managed by software, its contents are allowed to be read from and
written to by a P1 or P2 area program with a MOV instruction in privileged mode. The PMB
address array is allocated to addresses H'F610 0000 to H'F61F FFFF in the P4 area and the PMB
data array to addresses H'F710 0000 to H'F71F FFFF in the P4 area. VPN and V in the PMB can
be accessed as an address array, PPN, V, SZ, C, WT, and UB as a data array. V can be accessed
from both the address array side and the data array side. A program which executes a PMB
memory-mapped access should be placed in the page area at which the C bit in PMB is cleared to
0.
1. PMB address array read
When memory reading is performed while bits 31 to 20 in the address field are specified as
H'F61 which indicates the PMB address array and bits 11 to 8 in the address field as an entry,
bits 31 to 24 in the data field are read as VPN and bit 8 in the data field as V.
2. PMB address array write
When memory writing is performed while bits 31 to 20 in the address field are specified as
H'F61 which indicates the PMB address array and bits 11 to 8 in the address field as an entry,
and bits 31 to 24 in the data field are specified as VPN and bit 8 in the data field as V, data is
written to the specified entry.
3. PMB data array read
When memory reading is performed while bits 31 to 20 in the address field are specified as
H'F71 which indicates the PMB data array and bits 11 to 8 in the address field as an entry, bits
31 to 24 in the data field are read as PPN, bit 9 in the data field as UB, bit 8 in the data field as
V, bits 7 and 4 in the data field as SZ, bit 3 in the data field as C, and bit 0 in the data field as
WT.
4. PMB data array write
When memory writing is performed while bits 31 to 20 in the address field are specified as
H'F71 which indicates the PMB data array and bits 11 to 8 in the address field as an entry, and
bits 31 to 24 in the data field are specified as PPN, bit 9 in the data field as UB, bit 8 in the
data field as V, bits 7 and 4 in the data field as SZ, bit 3 in the data field as C, and bit 0 in the
data field as WT, data is written to the specified entry.
Содержание SH7780 Series
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Страница 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Страница 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Страница 450: ...Section 11 Local Bus State Controller LBSC Rev 1 00 Dec 13 2005 Page 400 of 1286 REJ09B0158 0100 ...
Страница 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
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Страница 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Страница 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Страница 1004: ...Section 24 Multimedia Card Interface MMCIF Rev 1 00 Dec 13 2005 Page 954 of 1286 REJ09B0158 0100 ...
Страница 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Страница 1070: ...Section 26 Serial Sound Interface SSI Module Rev 1 00 Dec 13 2005 Page 1020 of 1286 REJ09B0158 0100 ...
Страница 1104: ...Section 27 NAND Flash Memory Controller FLCTL Rev 1 00 Dec 13 2005 Page 1054 of 1286 REJ09B0158 0100 ...
Страница 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Страница 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Страница 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
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