arch/arm/include/asm/types.h

   1 #ifndef _ASM_TYPES_H
   2 #define _ASM_TYPES_H
   3
   4 #include <asm-generic/int-ll64.h>
   5
   6 /*
   7  * The C99 types uintXX_t that are usually defined in 'stdint.h' are not as
   8  * unambiguous on ARM as you would expect. For the types below, there is a
   9  * difference on ARM between GCC built for bare metal ARM, GCC built for glibc
  10  * and the kernel itself, which results in build errors if you try to build with
  11  * -ffreestanding and include 'stdint.h' (such as when you include 'arm_neon.h'
  12  * in order to use NEON intrinsics)
  13  *
  14  * As the typedefs for these types in 'stdint.h' are based on builtin defines
  15  * supplied by GCC, we can tweak these to align with the kernel's idea of those
  16  * types, so 'linux/types.h' and 'stdint.h' can be safely included from the same
  17  * source file (provided that -ffreestanding is used).
  18  *
  19  *                    int32_t         uint32_t               uintptr_t
  20  * bare metal GCC     long            unsigned long          unsigned int
  21  * glibc GCC          int             unsigned int           unsigned int
  22  * kernel             int             unsigned int           unsigned long
  23  */
  24
  25 #ifdef __INT32_TYPE__
  26 #undef __INT32_TYPE__
  27 #define __INT32_TYPE__          int
  28 #endif
  29
  30 #ifdef __UINT32_TYPE__
  31 #undef __UINT32_TYPE__
  32 #define __UINT32_TYPE__ unsigned int
  33 #endif
  34
  35 #ifdef __UINTPTR_TYPE__
  36 #undef __UINTPTR_TYPE__
  37 #define __UINTPTR_TYPE__        unsigned long
  38 #endif
  39
  40 #endif /* _ASM_TYPES_H */