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s390-bios: ptr2u32 and u32toptr

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Introduce inline functions to convert between pointers and unsigned 32-bit
ints. These are used to hide the ugliness required to  avoid compiler
warnings.

Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1554388475-18329-8-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Jason J. Herne 2019-04-04 10:34:26 -04:00 committed by Thomas Huth
parent c95df3d108
commit 1fb3e5cde8
1 changed files with 31 additions and 0 deletions
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31
pc-bios/s390-ccw/helper.h Normal file
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/*
* Helper Functions
*
* Copyright (c) 2019 IBM Corp.
*
* Author(s): Jason J. Herne <jjherne@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at
* your option) any later version. See the COPYING file in the top-level
* directory.
*/
#ifndef S390_CCW_HELPER_H
#define S390_CCW_HELPER_H
#include "s390-ccw.h"
/* Avoids compiler warnings when casting a pointer to a u32 */
static inline uint32_t ptr2u32(void *ptr)
{
IPL_assert((uint64_t)ptr <= 0xffffffff, "ptr2u32: ptr too large");
return (uint32_t)(uint64_t)ptr;
}
/* Avoids compiler warnings when casting a u32 to a pointer */
static inline void *u32toptr(uint32_t n)
{
return (void *)(uint64_t)n;
}
#endif