diff options
| -rw-r--r-- | arch/parisc/include/asm/page.h | 11 | ||||
| -rw-r--r-- | arch/parisc/kernel/cache.c | 64 |
2 files changed, 0 insertions, 75 deletions
diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h index 637fe031aa8..60d5d174dfe 100644 --- a/arch/parisc/include/asm/page.h +++ b/arch/parisc/include/asm/page.h @@ -32,17 +32,6 @@ void copy_page_asm(void *to, void *from); void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg); -/* #define CONFIG_PARISC_TMPALIAS */ - -#ifdef CONFIG_PARISC_TMPALIAS -void clear_user_highpage(struct page *page, unsigned long vaddr); -#define clear_user_highpage clear_user_highpage -struct vm_area_struct; -void copy_user_highpage(struct page *to, struct page *from, - unsigned long vaddr, struct vm_area_struct *vma); -#define __HAVE_ARCH_COPY_USER_HIGHPAGE -#endif - /* * These are used to make use of C type-checking.. */ diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index ac87a40502e..a6ffc775a9f 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 __flush_cache_page(vma, vmaddr, PFN_PHYS(pfn)); } } - -#ifdef CONFIG_PARISC_TMPALIAS - -void clear_user_highpage(struct page *page, unsigned long vaddr) -{ - void *vto; - unsigned long flags; - - /* Clear using TMPALIAS region. The page doesn't need to - be flushed but the kernel mapping needs to be purged. */ - - vto = kmap_atomic(page); - - /* The PA-RISC 2.0 Architecture book states on page F-6: - "Before a write-capable translation is enabled, *all* - non-equivalently-aliased translations must be removed - from the page table and purged from the TLB. (Note - that the caches are not required to be flushed at this - time.) Before any non-equivalent aliased translation - is re-enabled, the virtual address range for the writeable - page (the entire page) must be flushed from the cache, - and the write-capable translation removed from the page - table and purged from the TLB." */ - - purge_kernel_dcache_page_asm((unsigned long)vto); - purge_tlb_start(flags); - pdtlb_kernel(vto); - purge_tlb_end(flags); - preempt_disable(); - clear_user_page_asm(vto, vaddr); - preempt_enable(); - - pagefault_enable(); /* kunmap_atomic(addr, KM_USER0); */ -} - -void copy_user_highpage(struct page *to, struct page *from, - unsigned long vaddr, struct vm_area_struct *vma) -{ - void *vfrom, *vto; - unsigned long flags; - - /* Copy using TMPALIAS region. This has the advantage - that the `from' page doesn't need to be flushed. However, - the `to' page must be flushed in copy_user_page_asm since - it can be used to bring in executable code. */ - - vfrom = kmap_atomic(from); - vto = kmap_atomic(to); - - purge_kernel_dcache_page_asm((unsigned long)vto); - purge_tlb_start(flags); - pdtlb_kernel(vto); - pdtlb_kernel(vfrom); - purge_tlb_end(flags); - preempt_disable(); - copy_user_page_asm(vto, vfrom, vaddr); - flush_dcache_page_asm(__pa(vto), vaddr); - preempt_enable(); - - pagefault_enable(); /* kunmap_atomic(addr, KM_USER1); */ - pagefault_enable(); /* kunmap_atomic(addr, KM_USER0); */ -} - -#endif /* CONFIG_PARISC_TMPALIAS */ |