1 files changed, 67 insertions, 0 deletions

diff --git a/arch/arm/mm/copypage-v3.S b/arch/arm/mm/copypage-v3.S
new file mode 100644
index 000000000000..4940f1908316
--- /dev/null
+++ b/arch/arm/mm/copypage-v3.S
@@ -0,0 +1,67 @@
+/*
+ *  linux/arch/arm/lib/copypage.S
+ *
+ *  Copyright (C) 1995-1999 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  ASM optimised string functions
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <asm/assembler.h>
+#include <asm/constants.h>
+
+                .text
+                .align  5
+/*
+ * ARMv3 optimised copy_user_page
+ *
+ * FIXME: do we need to handle cache stuff...
+ */
+ENTRY(v3_copy_user_page)
+        stmfd   sp!, {r4, lr}                   @       2
+        mov     r2, #PAGE_SZ/64                 @       1
+        ldmia   r1!, {r3, r4, ip, lr}           @       4+1
+1:      stmia   r0!, {r3, r4, ip, lr}           @       4
+        ldmia   r1!, {r3, r4, ip, lr}           @       4+1
+        stmia   r0!, {r3, r4, ip, lr}           @       4
+        ldmia   r1!, {r3, r4, ip, lr}           @       4+1
+        stmia   r0!, {r3, r4, ip, lr}           @       4
+        ldmia   r1!, {r3, r4, ip, lr}           @       4
+        subs    r2, r2, #1                      @       1
+        stmia   r0!, {r3, r4, ip, lr}           @       4
+        ldmneia r1!, {r3, r4, ip, lr}           @       4
+        bne     1b                              @       1
+        LOADREGS(fd, sp!, {r4, pc})             @       3
+
+        .align  5
+/*
+ * ARMv3 optimised clear_user_page
+ *
+ * FIXME: do we need to handle cache stuff...
+ */
+ENTRY(v3_clear_user_page)
+        str     lr, [sp, #-4]!
+        mov     r1, #PAGE_SZ/64                 @ 1
+        mov     r2, #0                          @ 1
+        mov     r3, #0                          @ 1
+        mov     ip, #0                          @ 1
+        mov     lr, #0                          @ 1
+1:      stmia   r0!, {r2, r3, ip, lr}           @ 4
+        stmia   r0!, {r2, r3, ip, lr}           @ 4
+        stmia   r0!, {r2, r3, ip, lr}           @ 4
+        stmia   r0!, {r2, r3, ip, lr}           @ 4
+        subs    r1, r1, #1                      @ 1
+        bne     1b                              @ 1
+        ldr     pc, [sp], #4
+
+        __INITDATA
+
+        .type   v3_user_fns, #object
+ENTRY(v3_user_fns)
+        .long   v3_clear_user_page
+        .long   v3_copy_user_page
+        .size   v3_user_fns, . - v3_user_fns