Section 6 Memory Management Unit (MMU)
Rev. 1.00 Oct. 01, 2007 Page 142 of 1956
REJ09B0256-0100
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P0, P3, and U0 Areas:
The P0, P3, and U0 areas allow address translation using the TLB and access using the cache.
When the MMU is disabled, replacing the upper 3 bits of an address with 0s gives the
corresponding physical address. Whether or not the cache is used is determined by the CCR
setting. When the cache is used, switching between the copy-back method and the write-
through method for write accesses is specified by the WT bit in CCR.
When the MMU is enabled, these areas can be mapped onto any physical address space in 1-,
4-, or 64-Kbyte, or 1-Mbyte page units using the TLB. When CCR is in the cache enabled state
and the C bit for the corresponding page of the TLB entry is 1, accesses can be performed
using the cache. When the cache is used, switching between the copy-back method and the
write-through method for write accesses is specified by the WT bit of the TLB entry.
When the P0, P3, and U0 areas are mapped onto the control register area which is allocated in
the area 7 in physical address space by means of the TLB, the C bit for the corresponding page
must be cleared to 0.
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P1 Area:
The P1 area does not allow address translation using the TLB but can be accessed using the
cache.
Regardless of whether the MMU is enabled or disabled, clearing the upper 3 bits of an address
to 0 gives the corresponding physical address. Whether or not the cache is used is determined
by the CCR setting. When the cache is used, switching between the copy-back method and the
write-through method for write accesses is specified by the CB bit in CCR.
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P2 Area:
The P2 area does not allow address translation using the TLB and access using the cache.
Regardless of whether the MMU is enabled or disabled, clearing the upper 3 bits of an address
to 0 gives the corresponding physical address.
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P4 Area:
The P4 area is mapped onto the internal resource of this LSI. This area except the store queue
and on-chip memory areas does not allow address translation using the TLB. This area cannot
be accessed using the cache. The P4 area is shown in detail in figure 6.4.
Summary of Contents for SH7763
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Page 122: ...Section 2 Programming Model Rev 1 00 Oct 01 2007 Page 56 of 1956 REJ09B0256 0100 ...
Page 144: ...Section 3 Instruction Set Rev 1 00 Oct 01 2007 Page 78 of 1956 REJ09B0256 0100 ...
Page 170: ...Section 4 Pipelining Rev 1 00 Oct 01 2007 Page 104 of 1956 REJ09B0256 0100 ...
Page 282: ...Section 7 Caches Rev 1 00 Oct 01 2007 Page 216 of 1956 REJ09B0256 0100 ...
Page 378: ...Section 9 Interrupt Controller INTC Rev 1 00 Oct 01 2007 Page 312 of 1956 REJ09B0256 0100 ...
Page 514: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Oct 01 2007 Page 448 of 1956 REJ09B0256 0100 ...
Page 630: ...Section 13 PCI Controller PCIC Rev 1 00 Oct 01 2007 Page 564 of 1956 REJ09B0256 0100 ...
Page 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
Page 732: ...Section 17 Watchdog Timer and Reset WDT Rev 1 00 Oct 01 2007 Page 666 of 1956 REJ09B0256 0100 ...
Page 752: ...Section 18 Power Down Mode Rev 1 00 Oct 01 2007 Page 686 of 1956 REJ09B0256 0100 ...
Page 772: ...Section 19 Timer Unit TMU Rev 1 00 Oct 01 2007 Page 706 of 1956 REJ09B0256 0100 ...
Page 824: ...Section 21 Compare Match Timer CMT Rev 1 00 Oct 01 2007 Page 758 of 1956 REJ09B0256 0100 ...
Page 1124: ...Section 26 I 2 C Bus Interface IIC Rev 1 00 Oct 01 2007 Page 1058 of 1956 REJ09B0256 0100 ...
Page 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Page 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Page 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Page 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
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