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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"
#include "s390-time.h"
/* Avoids compiler warnings when casting a pointer to a u32 */
static inline uint32_t ptr2u32(void *ptr)
{
IPL_assert((uint64_t)ptr <= 0xffffffffull, "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;
}
static inline void yield(void)
{
asm volatile ("diag 0,0,0x44"
: :
: "memory", "cc");
}
static inline void sleep(unsigned int seconds)
{
ulong target = get_time_seconds() + seconds;
while (get_time_seconds() < target) {
yield();
}
}
#endif
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