Merge branch 'pending-misc' (early part) into devel

[safe/jmp/linux-2.6] / arch / arm / mm / copypage-xsc3.c

diff --git a/arch/arm/mm/copypage-xsc3.c b/arch/arm/mm/copypage-xsc3.c
index 51ed502..bc4525f 100644 (file)
--- a/arch/arm/mm/copypage-xsc3.c
+++ b/arch/arm/mm/copypage-xsc3.c
@@ -11,8 +11,7 @@
  * Author: Matt Gilbert (matthew.m.gilbert@intel.com)
  */
 #include <linux/init.h>
-
-#include <asm/page.h>
+#include <linux/highmem.h>
 
 /*
  * General note:
@@ -21,18 +20,17 @@
  */
 
 /*
- * XSC3 optimised copy_user_page
+ * XSC3 optimised copy_user_highpage
  *  r0 = destination
  *  r1 = source
- *  r2 = virtual user address of ultimate destination page
  *
  * The source page may have some clean entries in the cache already, but we
  * can safely ignore them - break_cow() will flush them out of the cache
  * if we eventually end up using our copied page.
  *
  */
-void __attribute__((naked))
-xsc3_mc_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr)
+static void __naked
+xsc3_mc_copy_user_page(void *kto, const void *kfrom)
 {
        asm("\
        stmfd   sp!, {r4, r5, lr}               \n\
@@ -72,31 +70,44 @@ xsc3_mc_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr)
        : "I" (PAGE_SIZE / 64 - 1));
 }
 
+void xsc3_mc_copy_user_highpage(struct page *to, struct page *from,
+       unsigned long vaddr)
+{
+       void *kto, *kfrom;
+
+       kto = kmap_atomic(to, KM_USER0);
+       kfrom = kmap_atomic(from, KM_USER1);
+       xsc3_mc_copy_user_page(kto, kfrom);
+       kunmap_atomic(kfrom, KM_USER1);
+       kunmap_atomic(kto, KM_USER0);
+}
+
 /*
  * XScale optimised clear_user_page
  *  r0 = destination
  *  r1 = virtual user address of ultimate destination page
  */
-void __attribute__((naked))
-xsc3_mc_clear_user_page(void *kaddr, unsigned long vaddr)
+void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr)
 {
-       asm("\
-       mov     r1, %0                          \n\
+       void *ptr, *kaddr = kmap_atomic(page, KM_USER0);
+       asm volatile ("\
+       mov     r1, %2                          \n\
        mov     r2, #0                          \n\
        mov     r3, #0                          \n\
-1:     mcr     p15, 0, r0, c7, c6, 1           @ invalidate line\n\
-       strd    r2, [r0], #8                    \n\
-       strd    r2, [r0], #8                    \n\
-       strd    r2, [r0], #8                    \n\
-       strd    r2, [r0], #8                    \n\
+1:     mcr     p15, 0, %0, c7, c6, 1           @ invalidate line\n\
+       strd    r2, [%0], #8                    \n\
+       strd    r2, [%0], #8                    \n\
+       strd    r2, [%0], #8                    \n\
+       strd    r2, [%0], #8                    \n\
        subs    r1, r1, #1                      \n\
-       bne     1b                              \n\
-       mov     pc, lr"
-       :
-       : "I" (PAGE_SIZE / 32));
+       bne     1b"
+       : "=r" (ptr)
+       : "0" (kaddr), "I" (PAGE_SIZE / 32)
+       : "r1", "r2", "r3");
+       kunmap_atomic(kaddr, KM_USER0);
 }
 
 struct cpu_user_fns xsc3_mc_user_fns __initdata = {
-       .cpu_clear_user_page    = xsc3_mc_clear_user_page,
-       .cpu_copy_user_page     = xsc3_mc_copy_user_page,
+       .cpu_clear_user_highpage = xsc3_mc_clear_user_highpage,
+       .cpu_copy_user_highpage = xsc3_mc_copy_user_highpage,
 };