text: /*
   * Copyright 2011 Freescale Semiconductor, Inc.
   *
   * 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.
   */
  
  #include <common.h>
  #include <asm/fsl_law.h>
  #include <asm/mmu.h>
  
  int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
  {
  	immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
  	law83xx_t *ecm = &immap->sysconf.ddrlaw[0];
  	u64 start_align, law_sz;
  	int law_sz_enc;
  
  	if (start == 0)
  		start_align = 1ull << (LAW_SIZE_2G + 1);
  	else
  		start_align = 1ull << (ffs64(start) - 1);
  	law_sz = min(start_align, sz);
  	law_sz_enc = __ilog2_u64(law_sz) - 1;
  
  	/*
  	 * Set up LAWBAR for all of DDR.
  	 */
  	ecm->bar = start & 0xfffff000;
  	ecm->ar  = (LAWAR_EN | (id << 20) | (LAWAR_SIZE & law_sz_enc));
  	debug("DDR:bar=0x%08x\n", ecm->bar);
  	debug("DDR:ar=0x%08x\n", ecm->ar);
  
  	/* recalculate size based on what was actually covered by the law */
  	law_sz = 1ull << __ilog2_u64(law_sz);
  
  	/* do we still have anything to map */
  	sz = sz - law_sz;
  	if (sz) {
  		start += law_sz;
  
  		start_align = 1ull << (ffs64(start) - 1);
  		law_sz = min(start_align, sz);
  		law_sz_enc = __ilog2_u64(law_sz) - 1;
  		ecm = &immap->sysconf.ddrlaw[1];
  		ecm->bar = start & 0xfffff000;
  		ecm->ar  = (LAWAR_EN | (id << 20) | (LAWAR_SIZE & law_sz_enc));
  		debug("DDR:bar=0x%08x\n", ecm->bar);
  		debug("DDR:ar=0x%08x\n", ecm->ar);
  	} else {
  		return 0;
  	}
  
  	/* do we still have anything to map */
  	sz = sz - law_sz;
  	if (sz)
  		return 1;
  
  	return 0;
  }
  