1a4fcaebe3
the memory or D-cache, depending on the semantics of the platform.
vm_sync_icache() is basically a wrapper around pmap_sync_icache(),
that translates the vm_map_t argumument to pmap_t.
o Introduce pmap_sync_icache() to all PMAP implementation. For powerpc
it replaces the pmap_page_executable() function, added to solve
the I-cache problem in uiomove_fromphys().
o In proc_rwmem() call vm_sync_icache() when writing to a page that
has execute permissions. This assures that when breakpoints are
written, the I-cache will be coherent and the process will actually
hit the breakpoint.
o This also fixes the Book-E PMAP implementation that was missing
necessary locking while trying to deal with the I-cache coherency
in pmap_enter() (read: mmu_booke_enter_locked).
The key property of this change is that the I-cache is made coherent
*after* writes have been done. Doing it in the PMAP layer when adding
or changing a mapping means that the I-cache is made coherent *before*
any writes happen. The difference is key when the I-cache prefetches.
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| .. | ||
| discovery | ||
| kirkwood | ||
| orion | ||
| bus_space.c | ||
| common.c | ||
| files.mv | ||
| gpio.c | ||
| ic.c | ||
| mv_machdep.c | ||
| mv_pci.c | ||
| mv_sata.c | ||
| mvreg.h | ||
| mvvar.h | ||
| mvwin.h | ||
| obio.c | ||
| rtc.c | ||
| std.mv | ||
| timer.c | ||
| twsi.c | ||