include/mapmem.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (c) 2015 National Instruments
   4  *
   5  * (C) Copyright 2015
   6  * Joe Hershberger <joe.hershberger@ni.com>
   7  */
   8
   9 #ifndef __MAPMEM_H
  10 #define __MAPMEM_H
  11
  12 /* Define a null map_sysmem() if the architecture doesn't use it */
  13 # ifdef CONFIG_ARCH_MAP_SYSMEM
  14 #include <asm/io.h>
  15 # else
  16 static inline void *map_sysmem(phys_addr_t paddr, unsigned long len)
  17 {
  18         return (void *)(uintptr_t)paddr;
  19 }
  20
  21 static inline void unmap_sysmem(const void *vaddr)
  22 {
  23 }
  24
  25 static inline phys_addr_t map_to_sysmem(const void *ptr)
  26 {
  27         return (phys_addr_t)(uintptr_t)ptr;
  28 }
  29 # endif
  30
  31 #endif /* __MAPMEM_H */