arch/avr32/mm/clear_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
   9 #include <linux/linkage.h>
  10 #include <asm/page.h>
  11
  12 /*
  13  * clear_page
  14  * r12: P1 address (to)
  15  */
  16         .text
  17         .global clear_page
  18 clear_page:
  19         sub     r9, r12, -PAGE_SIZE
  20         mov     r10, 0
  21         mov     r11, 0
  22 0:      st.d    r12++, r10
  23         cp      r12, r9
  24         brne    0b
  25         mov     pc, lr