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Commit dbbb06b7 authored by Vitaly Bordug's avatar Vitaly Bordug Committed by Paul Mackerras
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[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 eb07d964

In a nutshell, the board is nearly stuck without this, yet without any
visible failure - being just very slow.

Signed-off-by: default avatarVitaly Bordug <vbordug@ru.mvista.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent f25222b9

arch/powerpc/mm/mem.c

+10 −10
Original line number Diff line number Diff line
@@ -490,9 +490,6 @@ 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);

		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
@@ -503,6 +500,9 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, 
		 */

		_tlbie(address);

#endif

		if (!PageReserved(page)

		    && !test_bit(PG_arch_1, &page->flags)) {

			if (vma->vm_mm == current->active_mm) {

				__flush_dcache_icache((void *) address);

			} else

				flush_dcache_icache_page(page);