Section 2 Programming Model
Rev. 1.00 Oct. 01, 2007 Page 55 of 1956
REJ09B0256-0100
2.7 Usage
Note
2.7.1
Notes on Self-Modified Codes*
This LSI prefetches instructions more drastically than conventional SH-4 to accelerate the
processing speed. Therefore if the instruction in the memory is modified and it is executed
immediately, then the pre-modified code that is prefetched are likely to be executed. In order to
execute the modified code definitely, one of the following sequences should be executed between
the execution of modifying codes and modified codes.
(1) In case the modified codes are in non-cacheable area
SYNCO
ICBI @Rn
The target for the ICBI instruction can be any address within the range where no address error
exception occurs.
(2) In case the modified codes are in cacheable area (write-through)
SYNCO
ICBI @Rn
The all instruction cache area corresponding to the modified codes should be invalidated by the
ICBI instruction. The ICBI instruction should be issued to each cache line. One cache line is 32
bytes.
(3) In case the modified codes are in cacheable area (copy-back)
OCBP @Rm or OCBWB @Rm
SYNCO
ICBI @Rn
The all operand cache area corresponding to the modified codes should be written back to the
main memory by the OCBP or OCBWB instruction. Then the all instruction cache area
corresponding to the modified codes should be invalidated by the ICBI instruction. The OCBP,
OCBWB and ICBI instruction should be issued to each cache line. One cache line is 32 bytes.
Note: * Processes executed while changing the instructions on the memory dynamically.
Summary of Contents for SH7763
Page 2: ...Rev 1 00 Oct 01 2007 Page ii of lxvi ...
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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