/*
   * Implement the default iomap interfaces
   *
   * (C) Copyright 2004 Linus Torvalds
   * (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org>
   * (C) Copyright 2007 MIPS Technologies, Inc.
   *     written by Ralf Baechle <ralf@linux-mips.org>
   */
  #include <linux/module.h>
  #include <asm/io.h>
  
  /*
   * Read/write from/to an (offsettable) iomem cookie. It might be a PIO
   * access or a MMIO access, these functions don't care. The info is
   * encoded in the hardware mapping set up by the mapping functions
   * (or the cookie itself, depending on implementation and hw).
   *
   * The generic routines don't assume any hardware mappings, and just
   * encode the PIO/MMIO as part of the cookie. They coldly assume that
   * the MMIO IO mappings are not in the low address range.
   *
   * Architectures for which this is not true can't use this generic
   * implementation and should do their own copy.
   */
  
  #define PIO_MASK	0x0ffffUL
  
  unsigned int ioread8(void __iomem *addr)
  {
  	return readb(addr);
  }
  
  EXPORT_SYMBOL(ioread8);
  
  unsigned int ioread16(void __iomem *addr)
  {
  	return readw(addr);
  }
  
  EXPORT_SYMBOL(ioread16);
  
  unsigned int ioread16be(void __iomem *addr)
  {
  	return be16_to_cpu(__raw_readw(addr));
  }
  
  EXPORT_SYMBOL(ioread16be);
  
  unsigned int ioread32(void __iomem *addr)
  {
  	return readl(addr);
  }
  
  EXPORT_SYMBOL(ioread32);
  
  unsigned int ioread32be(void __iomem *addr)
  {
  	return be32_to_cpu(__raw_readl(addr));
  }
  
  EXPORT_SYMBOL(ioread32be);
  
  void iowrite8(u8 val, void __iomem *addr)
  {
  	writeb(val, addr);
  }
  
  EXPORT_SYMBOL(iowrite8);
  
  void iowrite16(u16 val, void __iomem *addr)
  {
  	writew(val, addr);
  }
  
  EXPORT_SYMBOL(iowrite16);
  
  void iowrite16be(u16 val, void __iomem *addr)
  {
  	__raw_writew(cpu_to_be16(val), addr);
  }
  
  EXPORT_SYMBOL(iowrite16be);
  
  void iowrite32(u32 val, void __iomem *addr)
  {
  	writel(val, addr);
  }
  
  EXPORT_SYMBOL(iowrite32);
  
  void iowrite32be(u32 val, void __iomem *addr)
  {
  	__raw_writel(cpu_to_be32(val), addr);
  }
  
  EXPORT_SYMBOL(iowrite32be);
  
  /*
   * These are the "repeat MMIO read/write" functions.
   * Note the "__raw" accesses, since we don't want to
   * convert to CPU byte order. We write in "IO byte
   * order" (we also don't have IO barriers).
   */
  static inline void mmio_insb(void __iomem *addr, u8 *dst, int count)
  {
  	while (--count >= 0) {
  		u8 data = __raw_readb(addr);
  		*dst = data;
  		dst++;
  	}
  }
  
  static inline void mmio_insw(void __iomem *addr, u16 *dst, int count)
  {
  	while (--count >= 0) {
  		u16 data = __raw_readw(addr);
  		*dst = data;
  		dst++;
  	}
  }
  
  static inline void mmio_insl(void __iomem *addr, u32 *dst, int count)
  {
  	while (--count >= 0) {
  		u32 data = __raw_readl(addr);
  		*dst = data;
  		dst++;
  	}
  }
  
  static inline void mmio_outsb(void __iomem *addr, const u8 *src, int count)
  {
  	while (--count >= 0) {
  		__raw_writeb(*src, addr);
  		src++;
  	}
  }
  
  static inline void mmio_outsw(void __iomem *addr, const u16 *src, int count)
  {
  	while (--count >= 0) {
  		__raw_writew(*src, addr);
  		src++;
  	}
  }
  
  static inline void mmio_outsl(void __iomem *addr, const u32 *src, int count)
  {
  	while (--count >= 0) {
  		__raw_writel(*src, addr);
  		src++;
  	}
  }
  
  void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
  {
  	mmio_insb(addr, dst, count);
  }
  
  EXPORT_SYMBOL(ioread8_rep);
  
  void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
  {
  	mmio_insw(addr, dst, count);
  }
  
  EXPORT_SYMBOL(ioread16_rep);
  
  void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
  {
  	mmio_insl(addr, dst, count);
  }
  
  EXPORT_SYMBOL(ioread32_rep);
  
  void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
  {
  	mmio_outsb(addr, src, count);
  }
  
  EXPORT_SYMBOL(iowrite8_rep);
  
  void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
  {
  	mmio_outsw(addr, src, count);
  }
  
  EXPORT_SYMBOL(iowrite16_rep);
  
  void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
  {
  	mmio_outsl(addr, src, count);
  }
  
  EXPORT_SYMBOL(iowrite32_rep);
  
  /*
   * Create a virtual mapping cookie for an IO port range
   *
   * This uses the same mapping are as the in/out family which has to be setup
   * by the platform initialization code.
   *
   * Just to make matters somewhat more interesting on MIPS systems with
   * multiple host bridge each will have it's own ioport address space.
   */
  static void __iomem *ioport_map_legacy(unsigned long port, unsigned int nr)
  {
  	return (void __iomem *) (mips_io_port_base + port);
  }
  
  void __iomem *ioport_map(unsigned long port, unsigned int nr)
  {
  	if (port > PIO_MASK)
  		return NULL;
  
  	return ioport_map_legacy(port, nr);
  }
  
  EXPORT_SYMBOL(ioport_map);
  
  void ioport_unmap(void __iomem *addr)
  {
  	/* Nothing to do */
  }
  
  EXPORT_SYMBOL(ioport_unmap);