Memory Management Unit
11-22 MPC823e REFERENCE MANUAL MOTOROLA
MEMORY MANAGEMENT
11
UNIT
PP2—Protection for a Second 1K Subpage in a 4K Page
This field contains a protection code for the second subpage in a 4K page. Depending on
the encoding mode, this field has different meanings.
PAGES OVER 4K WITH 4K RESOLUTION PROTECTION
(EXTENDED ENCODING)
PP1
SETTING
INSTRUCTION PAGES
PRIVILEGED MODE PROBLEM MODE
00 No access No access
01 Executable No access
10 Reserved Reserved
11 Reserved Reserved
PAGES OVER 4K WITH 4K RESOLUTION PROTECTION
(POWERPC ENCODING)
PP1
SETTING
INSTRUCTION PAGES
PRIVILEGED MODE PROBLEM MODE
00 Executable Executable
01 Executable No access
10 Executable Executable
11 Executable Executable
4K PAGES WITH 1K RESOLUTION PROTECTION
PP2
SETTING
INSTRUCTION PAGES
PRIVILEGED MODE PROBLEM MODE
00 No access No access
01 Executable No access
10 Executable Executable
11 Executable Executable
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