include/linux/virtio_byteorder.h

   1 #ifndef _LINUX_VIRTIO_BYTEORDER_H
   2 #define _LINUX_VIRTIO_BYTEORDER_H
   3 #include <linux/types.h>
   4 #include <uapi/linux/virtio_types.h>
   5
   6 /*
   7  * Low-level memory accessors for handling virtio in modern little endian and in
   8  * compatibility native endian format.
   9  */
  10
  11 static inline u16 __virtio16_to_cpu(bool little_endian, __virtio16 val)
  12 {
  13         if (little_endian)
  14                 return le16_to_cpu((__force __le16)val);
  15         else
  16                 return (__force u16)val;
  17 }
  18
  19 static inline __virtio16 __cpu_to_virtio16(bool little_endian, u16 val)
  20 {
  21         if (little_endian)
  22                 return (__force __virtio16)cpu_to_le16(val);
  23         else
  24                 return (__force __virtio16)val;
  25 }
  26
  27 static inline u32 __virtio32_to_cpu(bool little_endian, __virtio32 val)
  28 {
  29         if (little_endian)
  30                 return le32_to_cpu((__force __le32)val);
  31         else
  32                 return (__force u32)val;
  33 }
  34
  35 static inline __virtio32 __cpu_to_virtio32(bool little_endian, u32 val)
  36 {
  37         if (little_endian)
  38                 return (__force __virtio32)cpu_to_le32(val);
  39         else
  40                 return (__force __virtio32)val;
  41 }
  42
  43 static inline u64 __virtio64_to_cpu(bool little_endian, __virtio64 val)
  44 {
  45         if (little_endian)
  46                 return le64_to_cpu((__force __le64)val);
  47         else
  48                 return (__force u64)val;
  49 }
  50
  51 static inline __virtio64 __cpu_to_virtio64(bool little_endian, u64 val)
  52 {
  53         if (little_endian)
  54                 return (__force __virtio64)cpu_to_le64(val);
  55         else
  56                 return (__force __virtio64)val;
  57 }
  58
  59 #endif /* _LINUX_VIRTIO_BYTEORDER */