diff options
Diffstat (limited to 'arch/arc/mm/tlb.c')
| -rw-r--r-- | arch/arc/mm/tlb.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c index 086be526072a..003d69ac6ffa 100644 --- a/arch/arc/mm/tlb.c +++ b/arch/arc/mm/tlb.c @@ -418,9 +418,10 @@ void create_tlb(struct vm_area_struct *vma, unsigned long address, pte_t *ptep) local_irq_restore(flags); } -/* arch hook called by core VM at the end of handle_mm_fault( ), - * when a new PTE is entered in Page Tables or an existing one - * is modified. We aggresively pre-install a TLB entry +/* + * Called at the end of pagefault, for a userspace mapped page + * -pre-install the corresponding TLB entry into MMU + * -Finalize the delayed D-cache flush (wback+inv kernel mapping) */ void update_mmu_cache(struct vm_area_struct *vma, unsigned long vaddr_unaligned, pte_t *ptep) @@ -431,8 +432,15 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long vaddr_unaligned, /* icache doesn't snoop dcache, thus needs to be made coherent here */ if (vma->vm_flags & VM_EXEC) { - unsigned long paddr = pte_val(*ptep) & PAGE_MASK; - __inv_icache_page(paddr, vaddr); + struct page *page = pfn_to_page(pte_pfn(*ptep)); + + /* if page was dcache dirty, flush now */ + int dirty = test_and_clear_bit(PG_arch_1, &page->flags); + if (dirty) { + unsigned long paddr = pte_val(*ptep) & PAGE_MASK; + __flush_dcache_page(paddr); + __inv_icache_page(paddr, vaddr); + } } } |