arch/avr32/mm/copy_page.S

   1 /*
   2  * Copyright (C) 2004-2006 Atmel Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8 #include <linux/linkage.h>
   9 #include <asm/page.h>
  10
  11 /*
  12  * copy_page
  13  *
  14  * r12          to (P1 address)
  15  * r11          from (P1 address)
  16  * r8-r10       scratch
  17  */
  18         .text
  19         .global copy_page
  20 copy_page:
  21         sub     r10, r11, -(1 << PAGE_SHIFT)
  22         /* pref r11[0] */
  23 1:      /* pref r11[8] */
  24         ld.d    r8, r11++
  25         st.d    r12++, r8
  26         cp      r11, r10
  27         brlo    1b
  28         mov     pc, lr