Commit Graph

14 Commits

Author SHA1 Message Date
magumagu d557310371 Support for dynamic BAT modification (dynamic-bat).
Fundamentally, all this does is enforce the invariant that we always
translate effective addresses based on the current BAT registers and
page table before we do anything else with them.

This change can be logically divided into three parts.  The first part is
creating a table to represent the current BAT state, and keeping it up to
date (PowerPC::IBATUpdated, PowerPC::DBATUpdated, etc.).  This does
nothing by itself, but it's necessary for the other parts.

The second part (mostly in MMU.cpp) is simply removing all the hardcoded
checks for specific untranslated addresses, and consistently translating
addresses using the current BAT configuration. Very straightforward, but a
lot of code changes because we hardcoded assumptions all over the place.

The third part (mostly in Memmap.cpp) is making the fastmem arena reflect
the current BAT configuration.  We do this by redoing the mapping (calling
memmap()) based on the BAT table whenever it changes.

One additional minor change is that translation can fail in two ways:
either the segment is a direct store segment, or page table lookup failed.
The difference doesn't usually matter, but the difference affects cache
instructions, like dcbz.
2016-09-06 08:43:22 +02:00
Pierre Bourdon 3570c7f03a Reformat all the things. Have fun with merge conflicts. 2016-06-24 10:43:46 +02:00
mathieui 3e283ea9f1 More asterisks 2016-01-21 21:16:51 +01:00
Tillmann Karras 30ebb2459e Set copyright year to when a file was created 2015-05-25 13:22:31 +02:00
Tillmann Karras cefcb0ace9 Update license headers to GPLv2+ 2015-05-25 13:22:31 +02:00
magumagu ac54c6a4e2 Make address translation respect the CPU translation mode.
The PowerPC CPU has bits in MSR (DR and IR) which control whether
addresses are translated. We should respect these instead of mixing
physical addresses and translated addresses into the same address space.

This is mostly mass-renaming calls to memory accesses APIs from places
which expect address translation to use a different version from those
which do not expect address translation.

This does very little on its own, but it's the first step to a correct BAT
implementation.
2015-02-11 13:56:22 -08:00
Jasper St. Pierre 1e93b0db19 MemArena: Rename GrabLowMemSpace to GrabSHMSegment
This code originally tried to map the "low space" for the Gamecube's
memory layout, but since has expanded to mapping all of the easily
mappable memory on the system. Change the name to "GrabSHMSegment" to
indicate that we're looking for a shared memory segment we can map into
our process space.
2014-11-02 16:51:27 -08:00
Jasper St. Pierre 079b881d20 MemArena: Clean up the code that does the mirroring 2014-11-02 16:51:26 -08:00
Jasper St. Pierre 6813473367 MemArena: Remove the low mappings for our pointers
These are effectively unused, since the memmap already maps them in one
place. For 32-bit, they might have some slight advantage, but we already
special-case the regular "high-mem" pointer for 32-bit, so just use the
one we already have...
2014-11-02 16:50:36 -08:00
Rohit Nirmal fbc64984ca Include CommonTypes.h instead of Common.h. 2014-09-08 15:39:58 -04:00
Pierre Bourdon 83b7bb64aa Make Common/ mostly IWYU clean (and fix errors in rest of the project detected by this change). 2014-02-22 23:37:29 +01:00
Lioncash 2afe215271 Convert all includes to relative paths. 2014-02-18 02:19:10 -05:00
lioncash d2038049f5 Replace all include guard ifdefs with "#pragma once" 2014-02-10 18:07:16 -05:00
Jasper St. Pierre 34692ab826 Remove unnecessary Src/ folders 2013-12-31 14:03:19 -05:00