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reticulatedpines / magiclantern_simplified

A Git based version of Magic Lantern, for those unwilling or unable to work using Mercurial. The vast majority of branches have been removed, with those thought to be important brought in individually and merged.
GNU General Public License v2.0
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Digic X: Wider address space for device IO #80

Open kitor opened 1 year ago

kitor commented 1 year ago

MMU tables from R5:

00001000-00001FFF -> 00000000-00000FFF (-1000) O:NCACH I:WB,WA  P:RW   
00002000-3FFFFFFF -> 00002000-3FFFFFFF (   +0) O:NCACH I:WB,WA  P:RW   
40000000-BEFFFFFF -> 40000000-BEFFFFFF (   +0) O:NCACH I:NCACH  P:RW   
BF000000-DEFFFFFF -> BF000000-DEFFFFFF (   +0) Device           P:RW XN
DF000000-DFFFFFFF -> DF000000-DFFFFFFF (   +0) O:NCACH I:WB,WA  P:RW   
E0000000-E7FFFFFF -> E0000000-E7FFFFFF (   +0) O:WB,WA I:WB,WA  P:R    
E8000000-EFFFFFFF -> E8000000-EFFFFFFF (   +0) Strongly-ordered P:RW XN
F0000000-F7FFFFFF -> F0000000-F7FFFFFF (   +0) O:WB,WA I:WB,WA  P:R    
F8000000-FFFFFFFF -> F8000000-FFFFFFFF (   +0) Strongly-ordered P:R  XN

The important bit is BF000000-DEFFFFFF -> BF000000-DEFFFFFF ( +0) Device P:RW XN On D78 models it was RAM up to 0xD0000000.

Implications currently unknown, except maybe QEMU assumptions.