text: /*
   * Copyright (C) 2001 Ralf Baechle (ralf@gnu.org)
   */
  #include <linux/sched.h>
  #include <linux/mm.h>
  
  /* page functions */
  void r3k_clear_page(void * page)
  {
  	__asm__ __volatile__(
  		".set\tnoreorder\n\t"
  		".set\tnoat\n\t"
  		"addiu\t$1,%0,%2\n"
  		"1:\tsw\t$0,(%0)\n\t"
  		"sw\t$0,4(%0)\n\t"
  		"sw\t$0,8(%0)\n\t"
  		"sw\t$0,12(%0)\n\t"
  		"addiu\t%0,32\n\t"
  		"sw\t$0,-16(%0)\n\t"
  		"sw\t$0,-12(%0)\n\t"
  		"sw\t$0,-8(%0)\n\t"
  		"bne\t$1,%0,1b\n\t"
  		"sw\t$0,-4(%0)\n\t"
  		".set\tat\n\t"
  		".set\treorder"
  		: "=r" (page)
  		: "0" (page), "I" (PAGE_SIZE)
  		: "memory");
  }
  
  void r3k_copy_page(void * to, void * from)
  {
  	unsigned long dummy1, dummy2;
  	unsigned long reg1, reg2, reg3, reg4;
  
  	__asm__ __volatile__(
  		".set\tnoreorder\n\t"
  		".set\tnoat\n\t"
  		"addiu\t$1,%0,%8\n"
  		"1:\tlw\t%2,(%1)\n\t"
  		"lw\t%3,4(%1)\n\t"
  		"lw\t%4,8(%1)\n\t"
  		"lw\t%5,12(%1)\n\t"
  		"sw\t%2,(%0)\n\t"
  		"sw\t%3,4(%0)\n\t"
  		"sw\t%4,8(%0)\n\t"
  		"sw\t%5,12(%0)\n\t"
  		"lw\t%2,16(%1)\n\t"
  		"lw\t%3,20(%1)\n\t"
  		"lw\t%4,24(%1)\n\t"
  		"lw\t%5,28(%1)\n\t"
  		"sw\t%2,16(%0)\n\t"
  		"sw\t%3,20(%0)\n\t"
  		"sw\t%4,24(%0)\n\t"
  		"sw\t%5,28(%0)\n\t"
  		"addiu\t%0,64\n\t"
  		"addiu\t%1,64\n\t"
  		"lw\t%2,-32(%1)\n\t"
  		"lw\t%3,-28(%1)\n\t"
  		"lw\t%4,-24(%1)\n\t"
  		"lw\t%5,-20(%1)\n\t"
  		"sw\t%2,-32(%0)\n\t"
  		"sw\t%3,-28(%0)\n\t"
  		"sw\t%4,-24(%0)\n\t"
  		"sw\t%5,-20(%0)\n\t"
  		"lw\t%2,-16(%1)\n\t"
  		"lw\t%3,-12(%1)\n\t"
  		"lw\t%4,-8(%1)\n\t"
  		"lw\t%5,-4(%1)\n\t"
  		"sw\t%2,-16(%0)\n\t"
  		"sw\t%3,-12(%0)\n\t"
  		"sw\t%4,-8(%0)\n\t"
  		"bne\t$1,%0,1b\n\t"
  		"sw\t%5,-4(%0)\n\t"
  		".set\tat\n\t"
  		".set\treorder"
  		: "=r" (dummy1), "=r" (dummy2),
  		  "=&r" (reg1), "=&r" (reg2), "=&r" (reg3), "=&r" (reg4)
  		: "0" (to), "1" (from),
  		  "I" (PAGE_SIZE));
  }
  