pc-bios/s390-ccw/helper.h

   1 /*
   2  * Helper Functions
   3  *
   4  * Copyright (c) 2019 IBM Corp.
   5  *
   6  * Author(s): Jason J. Herne <jjherne@us.ibm.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   9  * your option) any later version. See the COPYING file in the top-level
  10  * directory.
  11  */
  12
  13 #ifndef S390_CCW_HELPER_H
  14 #define S390_CCW_HELPER_H
  15
  16 #include "s390-ccw.h"
  17
  18 /* Avoids compiler warnings when casting a pointer to a u32 */
  19 static inline uint32_t ptr2u32(void *ptr)
  20 {
  21     IPL_assert((uint64_t)ptr <= 0xffffffff, "ptr2u32: ptr too large");
  22     return (uint32_t)(uint64_t)ptr;
  23 }
  24
  25 /* Avoids compiler warnings when casting a u32 to a pointer */
  26 static inline void *u32toptr(uint32_t n)
  27 {
  28     return (void *)(uint64_t)n;
  29 }
  30
  31 #endif