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-rw-r--r--arch/parisc/kernel/cache.c64
1 files changed, 0 insertions, 64 deletions
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index ac87a40502e6..a6ffc775a9f8 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -581,67 +581,3 @@ flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long
581 __flush_cache_page(vma, vmaddr, PFN_PHYS(pfn)); 581 __flush_cache_page(vma, vmaddr, PFN_PHYS(pfn));
582 } 582 }
583} 583}
584
585#ifdef CONFIG_PARISC_TMPALIAS
586
587void clear_user_highpage(struct page *page, unsigned long vaddr)
588{
589 void *vto;
590 unsigned long flags;
591
592 /* Clear using TMPALIAS region. The page doesn't need to
593 be flushed but the kernel mapping needs to be purged. */
594
595 vto = kmap_atomic(page);
596
597 /* The PA-RISC 2.0 Architecture book states on page F-6:
598 "Before a write-capable translation is enabled, *all*
599 non-equivalently-aliased translations must be removed
600 from the page table and purged from the TLB. (Note
601 that the caches are not required to be flushed at this
602 time.) Before any non-equivalent aliased translation
603 is re-enabled, the virtual address range for the writeable
604 page (the entire page) must be flushed from the cache,
605 and the write-capable translation removed from the page
606 table and purged from the TLB." */
607
608 purge_kernel_dcache_page_asm((unsigned long)vto);
609 purge_tlb_start(flags);
610 pdtlb_kernel(vto);
611 purge_tlb_end(flags);
612 preempt_disable();
613 clear_user_page_asm(vto, vaddr);
614 preempt_enable();
615
616 pagefault_enable(); /* kunmap_atomic(addr, KM_USER0); */
617}
618
619void copy_user_highpage(struct page *to, struct page *from,
620 unsigned long vaddr, struct vm_area_struct *vma)
621{
622 void *vfrom, *vto;
623 unsigned long flags;
624
625 /* Copy using TMPALIAS region. This has the advantage
626 that the `from' page doesn't need to be flushed. However,
627 the `to' page must be flushed in copy_user_page_asm since
628 it can be used to bring in executable code. */
629
630 vfrom = kmap_atomic(from);
631 vto = kmap_atomic(to);
632
633 purge_kernel_dcache_page_asm((unsigned long)vto);
634 purge_tlb_start(flags);
635 pdtlb_kernel(vto);
636 pdtlb_kernel(vfrom);
637 purge_tlb_end(flags);
638 preempt_disable();
639 copy_user_page_asm(vto, vfrom, vaddr);
640 flush_dcache_page_asm(__pa(vto), vaddr);
641 preempt_enable();
642
643 pagefault_enable(); /* kunmap_atomic(addr, KM_USER1); */
644 pagefault_enable(); /* kunmap_atomic(addr, KM_USER0); */
645}
646
647#endif /* CONFIG_PARISC_TMPALIAS */