Yaya48
cf256aa081
Upstream: https://gitlab.com/qemu-project/qemu.git Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/*
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* Helper Functions
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*
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* Copyright (c) 2019 IBM Corp.
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*
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* Author(s): Jason J. Herne <[email protected]>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#ifndef S390_CCW_HELPER_H
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#define S390_CCW_HELPER_H
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#include "s390-ccw.h"
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#include "s390-time.h"
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/* Avoids compiler warnings when casting a pointer to a u32 */
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static inline uint32_t ptr2u32(void *ptr)
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{
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IPL_assert((uint64_t)ptr <= 0xffffffffull, "ptr2u32: ptr too large");
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return (uint32_t)(uint64_t)ptr;
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}
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/* Avoids compiler warnings when casting a u32 to a pointer */
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static inline void *u32toptr(uint32_t n)
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{
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return (void *)(uint64_t)n;
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}
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static inline void yield(void)
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{
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asm volatile ("diag %%r0,%%r0,0x44"
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: :
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: "memory", "cc");
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}
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static inline void sleep(unsigned int seconds)
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{
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unsigned long target = get_time_seconds() + seconds;
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while (get_time_seconds() < target) {
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yield();
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}
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}
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static inline size_t strnlen(const char *s, size_t maxlen)
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{
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size_t len = 0;
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while (len < maxlen && s[len]) {
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len++;
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}
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return len;
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}
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#endif
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