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 #include <linux/types.h>
  17
  18 static inline void *map_sysmem(phys_addr_t paddr, unsigned long len)
  19 {
  20         return (void *)(uintptr_t)paddr;
  21 }
  22
  23 static inline void unmap_sysmem(const void *vaddr)
  24 {
  25 }
  26
  27 static inline phys_addr_t map_to_sysmem(const void *ptr)
  28 {
  29         return (phys_addr_t)(uintptr_t)ptr;
  30 }
  31
  32 /**
  33  * nomap_sysmem() - pass through an address unchanged
  34  *
  35  * This is used to indicate an address which should NOT be mapped, e.g. in
  36  * SMBIOS tables. Using this function instead of a case shows that the sandbox
  37  * conversion has been done
  38  */
  39 static inline void *nomap_sysmem(phys_addr_t paddr, unsigned long len)
  40 {
  41         return (void *)(uintptr_t)paddr;
  42 }
  43
  44 static inline phys_addr_t nomap_to_sysmem(const void *ptr)
  45 {
  46         return (phys_addr_t)(uintptr_t)ptr;
  47 }
  48
  49 # endif
  50
  51 #endif /* __MAPMEM_H */