diff options
| author | Vitaly Bordug <vbordug@ru.mvista.com> | 2007-01-24 22:40:57 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-02-07 12:00:32 +1100 |
| commit | dbbb06b7f6ae8037a5f6b4498e492791e1929635 (patch) | |
| tree | a88e4458e65ea82ac1f1aa0e91c01390790375d9 | |
| parent | f25222b99542bcadf1cc53cc9aa0e304849242ca (diff) | |
[POWERPC] 8xx: platform specific mmu updates
This is just a straight port of the same done in arch/ppc
by Marcelo Tosatti. One used to be
[PATCH] ppc32 8xx: update_mmu_cache() needs unconditional tlbie,
commit eb07d964b4491d1bb5864cd3d7e7633ccdda9a53
In a nutshell, the board is nearly stuck without this, yet without any
visible failure - being just very slow.
Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/mm/mem.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index d1c0758c561..c85eda63d2b 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -490,19 +490,19 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, !cpu_has_feature(CPU_FTR_NOEXECUTE) && pfn_valid(pfn)) { struct page *page = pfn_to_page(pfn); +#ifdef CONFIG_8xx + /* On 8xx, cache control instructions (particularly + * "dcbst" from flush_dcache_icache) fault as write + * operation if there is an unpopulated TLB entry + * for the address in question. To workaround that, + * we invalidate the TLB here, thus avoiding dcbst + * misbehaviour. + */ + _tlbie(address); +#endif if (!PageReserved(page) && !test_bit(PG_arch_1, &page->flags)) { if (vma->vm_mm == current->active_mm) { -#ifdef CONFIG_8xx - /* On 8xx, cache control instructions (particularly - * "dcbst" from flush_dcache_icache) fault as write - * operation if there is an unpopulated TLB entry - * for the address in question. To workaround that, - * we invalidate the TLB here, thus avoiding dcbst - * misbehaviour. - */ - _tlbie(address); -#endif __flush_dcache_icache((void *) address); } else flush_dcache_icache_page(page); |