Section 6 Memory Management Unit (MMU)
Rev. 1.00 Oct. 01, 2007 Page 178 of 1956
REJ09B0256-0100
6.7.1
Overview of 32-Bit Address Extended Mode
In 32-bit address extended mode, the privileged space mapping buffer (PMB) is introduced. The
PMB maps virtual addresses in the P1 or P2 area which are not translated in 29-bit address mode
to the 32-bit physical address space. In areas which are target for address translation of the TLB
(UTLB/ITLB), upper three bits in the PPN field of the UTLB or ITLB are extended and then
addresses after the TLB translation can handle the 32-bit physical addresses.
As for the cache operation, P1 area is cacheable and P2 area is non-cacheable in the case of 29-bit
address mode, but the cache operation of both P1 and P2 area are determined by the C bit and WT
bit in the PMB in the case of 32-bit address mode.
6.7.2
Transition to 32-Bit Address Extended Mode
This LSI enters 29-bit address mode after a power-on reset. Transition is made to 32-bit address
extended mode by setting the SE bit in PASCR to 1. In 32-bit address extended mode, the MMU
operates as follows.
1. When the AT bit in MMUCR is 0, virtual addresses in the U0, P0, or P3 area become 32-bit
physical addresses. Addresses in the P1 or P2 area are translated according to the PMB
mapping information.
B'10 should be set to the upper 2 bits of virtual page number (VPN[31:30]) in the PMB in
order to indicate P1 or P2 area. The operation is not guaranteed when the value except B'10 is
set to these bits.
2. When the AT bit in MMUCR is 1, virtual addresses in the U0, P0, or P3 area are translated to
32-bit physical addresses according to the TLB conversion information. Addresses in the P1 or
P2 area are translated according to the PMB mapping information.
B'10 should be set to the upper 2 bits of virtual page number (VPN[31:30]) in the PMB in
order to indicate P1 or P2 area. The operation is not guaranteed when the value except B'10 is
set to these bits.
3. Regardless of the setting of the AT bit in MMUCR, bits 31 to 29 in physical addresses become
B'111 in the control register area (addresses H'FC00 0000 to H'FFFF FFFF). When the control
register area is recorded in the UTLB and accessed, B'111 should be set to PPN[31:29].
Содержание SH7763
Страница 2: ...Rev 1 00 Oct 01 2007 Page ii of lxvi ...
Страница 122: ...Section 2 Programming Model Rev 1 00 Oct 01 2007 Page 56 of 1956 REJ09B0256 0100 ...
Страница 144: ...Section 3 Instruction Set Rev 1 00 Oct 01 2007 Page 78 of 1956 REJ09B0256 0100 ...
Страница 170: ...Section 4 Pipelining Rev 1 00 Oct 01 2007 Page 104 of 1956 REJ09B0256 0100 ...
Страница 282: ...Section 7 Caches Rev 1 00 Oct 01 2007 Page 216 of 1956 REJ09B0256 0100 ...
Страница 378: ...Section 9 Interrupt Controller INTC Rev 1 00 Oct 01 2007 Page 312 of 1956 REJ09B0256 0100 ...
Страница 514: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Oct 01 2007 Page 448 of 1956 REJ09B0256 0100 ...
Страница 630: ...Section 13 PCI Controller PCIC Rev 1 00 Oct 01 2007 Page 564 of 1956 REJ09B0256 0100 ...
Страница 686: ...Section 14 Direct Memory Access Controller DMAC Rev 1 00 Oct 01 2007 Page 620 of 1956 REJ09B0256 0100 ...
Страница 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
Страница 732: ...Section 17 Watchdog Timer and Reset WDT Rev 1 00 Oct 01 2007 Page 666 of 1956 REJ09B0256 0100 ...
Страница 752: ...Section 18 Power Down Mode Rev 1 00 Oct 01 2007 Page 686 of 1956 REJ09B0256 0100 ...
Страница 772: ...Section 19 Timer Unit TMU Rev 1 00 Oct 01 2007 Page 706 of 1956 REJ09B0256 0100 ...
Страница 824: ...Section 21 Compare Match Timer CMT Rev 1 00 Oct 01 2007 Page 758 of 1956 REJ09B0256 0100 ...
Страница 1060: ...Section 23 Gigabit Ethernet Controller GETHER Rev 1 00 Oct 01 2007 Page 994 of 1956 REJ09B0256 0100 ...
Страница 1062: ...Section 24 IP Security Accelerator SECURITY Rev 1 00 Oct 01 2007 Page 996 of 1956 REJ09B0256 0100 ...
Страница 1124: ...Section 26 I 2 C Bus Interface IIC Rev 1 00 Oct 01 2007 Page 1058 of 1956 REJ09B0256 0100 ...
Страница 1184: ...Section 27 Serial Communication Interface with FIFO SCIF Rev 1 00 Oct 01 2007 Page 1118 of 1956 REJ09B0256 0100 ...
Страница 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Страница 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Страница 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Страница 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
Страница 2025: ......
Страница 2026: ...SH7763 Hardware Manual ...