MOTOROLA
Chapter 9. Memory Management Unit (MMU)
9-21
Part II. PowerPC Microprocessor Module
Table 9-11 describes MI_RPN Þelds.
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field
RPN
Reset
Ñ
R/W
R/W
Bit
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Field
RPN
PP
SPS
SH
CI
V
Reset
Ñ
R/W
R/W
SPR
790
Figure 9-11. IMMU Real Page Number Register (MI_RPN)
Table 9-11. MI_RPN Field Descriptions
Bits
Name
4-Kbyte Pages AND
MI_CTR[PPM] = 1
Greater than 4-Kbyte Pages OR MI_CTR[PPM] = 0
0Ð19
RPN
Real (physical) page number
20Ð21 PP
Protection attributes for
subpages 1Ð4 in a 4-Kbyte
page.
Supervisor
User
00
No access
No access
01
Executable
No access
1x
Executable
Executable
Extended Encoding:
Supervisor
User
00
No access
No access
01
Executable
No access
1x
Reserved
Reserved
PowerPC Encoding:
Supervisor
User
00
Executable
No access
01
Executable
Executable
1x
Executable
Executable
22
0 Bits 20Ð21 contain PowerPC encoding
1 Bits 20Ð21 contain extended encoding
23
Reserved
24Ð25
MD_CTR[PPCS] = 0
For 1 Kbyte pages in mode 3, set to
the appropriate subpage validity (see
Section 9.5, ÒProtection Resolution
ModesÓ). Otherwise, set to 0b1111.
MD_CTR[PPCS] = 1
1000 Hit only for supervisor
accesses
0100 Hit only for user accesses
1100 Hit for both
26Ð27
28
SPS
Small page size: Clear to 0.
Small page size. Valid only when L1 descriptor[PS] = 00
0 4 Kbyte
1 16 Kbyte
29
SH
Shared page:
0 This entry matches only if ASID Þeld in the TLB entry matches the value M_CASID.
1 ASID comparison is disabled for the entry.
30
CI
Cache-inhibit attribute for the entry.
31
V
Entry valid indication.
Содержание MPC860 PowerQUICC
Страница 3: ...MPC860UM AD 07 98 REV 1 MPC860 PowerQUICC ª UserÕs Manual ...
Страница 36: ...xxxvi MPC860 PowerQUICC UserÕs Manual MOTOROLA CONTENTS Paragraph Number Title Page Number ...
Страница 78: ...I iv MPC860 PowerQUICC UserÕs Manual MOTOROLA Part I Overview ...
Страница 88: ...1 10 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part I Overview ...
Страница 114: ...3 16 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part I Overview ...
Страница 226: ...8 32 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part II PowerPC Microprocessor Module ...
Страница 262: ...9 36 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part II PowerPC Microprocessor Module ...
Страница 274: ...III iv MPC860 PowerQUICC UserÕs Manual MOTOROLA Part III Configuration ...
Страница 320: ...12 12 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part III Configuration ...
Страница 325: ...MOTOROLA Part IV Hardware Interface IV v Part IV Hardware Interface ...
Страница 326: ...IV vi MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Страница 352: ...13 26 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Страница 394: ...14 42 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Страница 426: ...15 32 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Страница 530: ...17 26 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Страница 632: ...21 44 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 660: ...22 28 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 708: ...24 24 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 748: ...27 20 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 846: ...31 20 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 914: ...35 12 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 948: ...36 34 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 998: ...37 48 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part VI Debug and Test ...
Страница 1016: ...A 10 MPC860 PowerQUICC UserÕs Manual MOTOROLA Appendixes ...
Страница 1024: ...B 8 MPC860 PowerQUICC UserÕs Manual MOTOROLA Appendixes ...
Страница 1030: ...C 6 MPC860 PowerQUICC UserÕs Manual MOTOROLA Appendixes ...
Страница 1086: ...Glossary 12 MPC860 PowerQUICC UserÕs Manual MOTOROLA ...
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