1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * ARM simple delay routines
4  */
5 
6 #ifndef SELFTEST_KVM_ARM_DELAY_H
7 #define SELFTEST_KVM_ARM_DELAY_H
8 
9 #include "arch_timer.h"
10 
11 static inline void __delay(uint64_t cycles)
12 {
13 	enum arch_timer timer = VIRTUAL;
14 	uint64_t start = timer_get_cntct(timer);
15 
16 	while ((timer_get_cntct(timer) - start) < cycles)
17 		cpu_relax();
18 }
19 
20 static inline void udelay(unsigned long usec)
21 {
22 	__delay(usec_to_cycles(usec));
23 }
24 
25 #endif /* SELFTEST_KVM_ARM_DELAY_H */
26