Section 7 Memory Management Unit (MMU)
Rev.1.00 Dec. 13, 2005 Page 195 of 1286
REJ09B0158-0100
ITLB: The PPN field in the ITLB is extended to bits 31 to 10.
UTLB: The PPN field in the UTLB is extended to bits 31 to 10. The same UB bit as that in the
PMB is added in each entry of the UTLB.
•
UB: Buffered write bit
Specifies whether a buffered write is performed.
0: Buffered write (Subsequent processing proceeds without waiting for the write to complete.)
1: Unbuffered write (Subsequent processing is stalled until the write has completed.)
In a memory-mapped TLB access, the UB bit can be read from or written to by bit 9 in the data
array.
PTEL: The same UB bit as that in the PMB is added in bit 9 in PTEL. This UB bit is written to
the UB bit in the UTLB by the LDTLB instruction. The PPN field is extended to bits 31 to 10.
CCR.CB: The CB bit in CCR is invalid. Whether a cacheable write for the P1 area is performed
in copy-back mode or write-though mode is determined by the WT bit in the PMB.
IRMCR.MT: The MT bit in IRMCR is valid for a memory-mapped PMB write.
QACR0, QACR1: AREA0[4:2]/AREA1[4:2] fields of QACR0/QACR1 are extended to
AREA0[7:2]/AREA1[7:2] corresponding to physical address [31:26]. See section 8.2.2, Queue
Address Control Register 0 (QACR0) and 8.2.3, Queue Address Control Register 1 (QACR1).
LSA0, LSA1, LDA0, LDA1: L0SADR, L1SADR, L0DADR and L1DADR fields are extended to
bits 31 to 10. See section 9.2.2, L Memory Transfer Source Address Register 0 (LSA0), section
9.2.3, L Memory Transfer Source Address Register 1 (LSA1), section 9.2.4, L Memory Transfer
Destination Address Register 0 (LDA0), and section 9.2.5, L Memory Transfer Destination
Address Register 1 (LDA1).
When using 32-bit address mode, the following notes should be applied to software.
1. For the SE bit switching, only switching from 0 to 1 is supported in Cache and MMU disabled
boot routine after a power-on reset or manual reset.
2. After switching the SE bit, an area in which the program is allocated becomes the target of the
PMB address translation. Therefore, the area should be recorded in the PMB before switching
the SE bit. An address which may be accessed in the P1 or P2 area such as the exception
handler should also be recorded in the PMB.
3. When an external memory access occurs by an operand memory access located before the
MOV.L instruction which switches the SE bit, external memory space addresses accessed in
both address modes should be the same.
Summary of Contents for SH7780 Series
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Page 82: ...Section 1 Overview Rev 1 00 Dec 13 2005 Page 32 of 1286 REJ09B0158 0100 ...
Page 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Page 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Page 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Page 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Page 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Page 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Page 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Page 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Page 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Page 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Page 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Page 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Page 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
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