#ifndef _ASM_POWERPC_SCATTERLIST_H
  #define _ASM_POWERPC_SCATTERLIST_H

  /*
   * Copyright (C) 2001 PPC64 Team, IBM Corp
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */

  #ifdef __KERNEL__

  #include <linux/types.h>
  #include <asm/dma.h>
  
  struct scatterlist {
  	struct page *page;
  	unsigned int offset;
  	unsigned int length;
  
  	/* For TCE support */

  	dma_addr_t dma_address;

  	u32 dma_length;
  };

  /*
   * These macros should be used after a dma_map_sg call has been done
   * to get bus addresses of each of the SG entries and their lengths.
   * You should only work with the number of sg entries pci_map_sg
   * returns, or alternatively stop on the first sg_dma_len(sg) which
   * is 0.
   */

  #define sg_dma_address(sg)	((sg)->dma_address)

  #ifdef __powerpc64__

  #define sg_dma_len(sg)		((sg)->dma_length)

  #else
  #define sg_dma_len(sg)		((sg)->length)
  #endif

  #ifdef __powerpc64__

  #define ISA_DMA_THRESHOLD	(~0UL)

  #endif

  #endif /* __KERNEL__ */
  #endif /* _ASM_POWERPC_SCATTERLIST_H */