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kernel/linux-rt-4.4.41/arch/openrisc/include/asm/io.h 1.31 KB
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  /*
   * OpenRISC Linux
   *
   * Linux architectural port borrowing liberally from similar works of
   * others.  All original copyrights apply as per the original source
   * declaration.
   *
   * OpenRISC implementation:
   * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
   * et al.
   *
   * 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.
   */
  
  #ifndef __ASM_OPENRISC_IO_H
  #define __ASM_OPENRISC_IO_H
  
  /*
   * PCI: can we really do 0 here if we have no port IO?
   */
  #define IO_SPACE_LIMIT		0
  
  /* OpenRISC has no port IO */
  #define HAVE_ARCH_PIO_SIZE	1
  #define PIO_RESERVED		0X0UL
  #define PIO_OFFSET		0
  #define PIO_MASK		0
  
  #include <asm-generic/io.h>
  #include <asm/pgtable.h>
  
  extern void __iomem *__ioremap(phys_addr_t offset, unsigned long size,
  				pgprot_t prot);
  
  static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
  {
  	return __ioremap(offset, size, PAGE_KERNEL);
  }
  
  /* #define _PAGE_CI       0x002 */
  static inline void __iomem *ioremap_nocache(phys_addr_t offset,
  					     unsigned long size)
  {
  	return __ioremap(offset, size,
  			 __pgprot(pgprot_val(PAGE_KERNEL) | _PAGE_CI));
  }
  
  extern void iounmap(void *addr);
  #endif