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author | Marcel Moolenaar <marcel@FreeBSD.org> | 2009-10-21 18:38:02 +0000 |
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committer | Marcel Moolenaar <marcel@FreeBSD.org> | 2009-10-21 18:38:02 +0000 |
commit | 1a4fcaebe30b3067a19baf8871a27942f4bb32cf (patch) | |
tree | 9665f89431ede73407ae0ad11ebcc8198166085e /sys/powerpc/include | |
parent | a7b5ad271ca6f0dca42accb1e6b16a630f74451d (diff) | |
download | src-1a4fcaebe30b3067a19baf8871a27942f4bb32cf.tar.gz src-1a4fcaebe30b3067a19baf8871a27942f4bb32cf.zip |
o Introduce vm_sync_icache() for making the I-cache coherent with
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.
Notes
Notes:
svn path=/head/; revision=198341
Diffstat (limited to 'sys/powerpc/include')
-rw-r--r-- | sys/powerpc/include/pmap.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/sys/powerpc/include/pmap.h b/sys/powerpc/include/pmap.h index d4fce7fef910..a23052ea975c 100644 --- a/sys/powerpc/include/pmap.h +++ b/sys/powerpc/include/pmap.h @@ -171,7 +171,6 @@ void pmap_bootstrap(vm_offset_t, vm_offset_t); void pmap_kenter(vm_offset_t va, vm_offset_t pa); void pmap_kremove(vm_offset_t); void *pmap_mapdev(vm_offset_t, vm_size_t); -boolean_t pmap_page_executable(vm_page_t); void pmap_unmapdev(vm_offset_t, vm_size_t); void pmap_deactivate(struct thread *); vm_offset_t pmap_kextract(vm_offset_t); |