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-rw-r--r--arch/parisc/include/asm/page.h20
-rw-r--r--arch/parisc/kernel/cache.c49
-rw-r--r--arch/parisc/kernel/parisc_ksyms.c5
3 files changed, 40 insertions, 34 deletions
diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h
index 4e0e7dbf0f3..b7adb2ac049 100644
--- a/arch/parisc/include/asm/page.h
+++ b/arch/parisc/include/asm/page.h
@@ -21,15 +21,27 @@
#include <asm/types.h>
#include <asm/cache.h>
-#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
-#define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from))
+#define clear_page(page) clear_page_asm((void *)(page))
+#define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from))
struct page;
-void copy_user_page_asm(void *to, void *from);
+void clear_page_asm(void *page);
+void copy_page_asm(void *to, void *from);
+void clear_user_page(void *vto, unsigned long vaddr, struct page *pg);
void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
struct page *pg);
-void clear_user_page(void *page, 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 b89a85ab945..d9cbb4b22c9 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -329,17 +329,6 @@ EXPORT_SYMBOL(flush_kernel_dcache_page_asm);
EXPORT_SYMBOL(flush_data_cache_local);
EXPORT_SYMBOL(flush_kernel_icache_range_asm);
-void clear_user_page_asm(void *page, unsigned long vaddr)
-{
- unsigned long flags;
- /* This function is implemented in assembly in pacache.S */
- extern void __clear_user_page_asm(void *page, unsigned long vaddr);
-
- purge_tlb_start(flags);
- __clear_user_page_asm(page, vaddr);
- purge_tlb_end(flags);
-}
-
#define FLUSH_THRESHOLD 0x80000 /* 0.5MB */
int parisc_cache_flush_threshold __read_mostly = FLUSH_THRESHOLD;
@@ -373,20 +362,9 @@ void __init parisc_setup_cache_timing(void)
printk(KERN_INFO "Setting cache flush threshold to %x (%d CPUs online)\n", parisc_cache_flush_threshold, num_online_cpus());
}
-extern void purge_kernel_dcache_page(unsigned long);
-extern void clear_user_page_asm(void *page, unsigned long vaddr);
-
-void clear_user_page(void *page, unsigned long vaddr, struct page *pg)
-{
- unsigned long flags;
-
- purge_kernel_dcache_page((unsigned long)page);
- purge_tlb_start(flags);
- pdtlb_kernel(page);
- purge_tlb_end(flags);
- clear_user_page_asm(page, vaddr);
-}
-EXPORT_SYMBOL(clear_user_page);
+extern void purge_kernel_dcache_page_asm(unsigned long);
+extern void clear_user_page_asm(void *, unsigned long);
+extern void copy_user_page_asm(void *, void *, unsigned long);
void flush_kernel_dcache_page_addr(void *addr)
{
@@ -399,11 +377,26 @@ void flush_kernel_dcache_page_addr(void *addr)
}
EXPORT_SYMBOL(flush_kernel_dcache_page_addr);
+void clear_user_page(void *vto, unsigned long vaddr, struct page *page)
+{
+ clear_page_asm(vto);
+ if (!parisc_requires_coherency())
+ flush_kernel_dcache_page_asm(vto);
+}
+EXPORT_SYMBOL(clear_user_page);
+
void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
- struct page *pg)
+ struct page *pg)
{
- /* no coherency needed (all in kmap/kunmap) */
- copy_user_page_asm(vto, vfrom);
+ /* Copy using kernel mapping. No coherency is needed
+ (all in kmap/kunmap) on machines that don't support
+ non-equivalent aliasing. However, the `from' page
+ needs to be flushed before it can be accessed through
+ the kernel mapping. */
+ preempt_disable();
+ flush_dcache_page_asm(__pa(vfrom), vaddr);
+ preempt_enable();
+ copy_page_asm(vto, vfrom);
if (!parisc_requires_coherency())
flush_kernel_dcache_page_asm(vto);
}
diff --git a/arch/parisc/kernel/parisc_ksyms.c b/arch/parisc/kernel/parisc_ksyms.c
index ceec85de629..6795dc6c995 100644
--- a/arch/parisc/kernel/parisc_ksyms.c
+++ b/arch/parisc/kernel/parisc_ksyms.c
@@ -157,5 +157,6 @@ extern void _mcount(void);
EXPORT_SYMBOL(_mcount);
#endif
-/* from pacache.S -- needed for copy_page */
-EXPORT_SYMBOL(copy_user_page_asm);
+/* from pacache.S -- needed for clear/copy_page */
+EXPORT_SYMBOL(clear_page_asm);
+EXPORT_SYMBOL(copy_page_asm);