1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_IA64_DELAY_H
 3#define _ASM_IA64_DELAY_H
 4
 5/*
 6 * Delay routines using a pre-computed "cycles/usec" value.
 7 *
 8 * Copyright (C) 1998, 1999 Hewlett-Packard Co
 9 *	David Mosberger-Tang <davidm@hpl.hp.com>
10 * Copyright (C) 1999 VA Linux Systems
11 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
12 * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com>
13 * Copyright (C) 1999 Don Dugger <don.dugger@intel.com>
14 */
15
16#include <linux/kernel.h>
17#include <linux/sched.h>
18#include <linux/compiler.h>
19
20#include <asm/intrinsics.h>
21#include <asm/processor.h>
22
23static __inline__ void
24ia64_set_itm (unsigned long val)
25{
26	ia64_setreg(_IA64_REG_CR_ITM, val);
27	ia64_srlz_d();
28}
29
30static __inline__ unsigned long
31ia64_get_itm (void)
32{
33	unsigned long result;
34
35	result = ia64_getreg(_IA64_REG_CR_ITM);
36	ia64_srlz_d();
37	return result;
38}
39
40static __inline__ void
41ia64_set_itv (unsigned long val)
42{
43	ia64_setreg(_IA64_REG_CR_ITV, val);
44	ia64_srlz_d();
45}
46
47static __inline__ unsigned long
48ia64_get_itv (void)
49{
50	return ia64_getreg(_IA64_REG_CR_ITV);
51}
52
53static __inline__ void
54ia64_set_itc (unsigned long val)
55{
56	ia64_setreg(_IA64_REG_AR_ITC, val);
57	ia64_srlz_d();
58}
59
60static __inline__ unsigned long
61ia64_get_itc (void)
62{
63	unsigned long result;
64
65	result = ia64_getreg(_IA64_REG_AR_ITC);
66	ia64_barrier();
67#ifdef CONFIG_ITANIUM
68	while (unlikely((__s32) result == -1)) {
69		result = ia64_getreg(_IA64_REG_AR_ITC);
70		ia64_barrier();
71	}
72#endif
73	return result;
74}
75
76extern void ia64_delay_loop (unsigned long loops);
77
78static __inline__ void
79__delay (unsigned long loops)
80{
81	if (unlikely(loops < 1))
82		return;
83
84	ia64_delay_loop (loops - 1);
85}
86
87extern void udelay (unsigned long usecs);
88
89#endif /* _ASM_IA64_DELAY_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_IA64_DELAY_H
 3#define _ASM_IA64_DELAY_H
 4
 5/*
 6 * Delay routines using a pre-computed "cycles/usec" value.
 7 *
 8 * Copyright (C) 1998, 1999 Hewlett-Packard Co
 9 *	David Mosberger-Tang <davidm@hpl.hp.com>
10 * Copyright (C) 1999 VA Linux Systems
11 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
12 * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com>
13 * Copyright (C) 1999 Don Dugger <don.dugger@intel.com>
14 */
15
16#include <linux/kernel.h>
17#include <linux/sched.h>
18#include <linux/compiler.h>
19
20#include <asm/intrinsics.h>
21#include <asm/processor.h>
22
23static __inline__ void
24ia64_set_itm (unsigned long val)
25{
26	ia64_setreg(_IA64_REG_CR_ITM, val);
27	ia64_srlz_d();
28}
29
30static __inline__ unsigned long
31ia64_get_itm (void)
32{
33	unsigned long result;
34
35	result = ia64_getreg(_IA64_REG_CR_ITM);
36	ia64_srlz_d();
37	return result;
38}
39
40static __inline__ void
41ia64_set_itv (unsigned long val)
42{
43	ia64_setreg(_IA64_REG_CR_ITV, val);
44	ia64_srlz_d();
45}
46
47static __inline__ unsigned long
48ia64_get_itv (void)
49{
50	return ia64_getreg(_IA64_REG_CR_ITV);
51}
52
53static __inline__ void
54ia64_set_itc (unsigned long val)
55{
56	ia64_setreg(_IA64_REG_AR_ITC, val);
57	ia64_srlz_d();
58}
59
60static __inline__ unsigned long
61ia64_get_itc (void)
62{
63	unsigned long result;
64
65	result = ia64_getreg(_IA64_REG_AR_ITC);
66	ia64_barrier();
67#ifdef CONFIG_ITANIUM
68	while (unlikely((__s32) result == -1)) {
69		result = ia64_getreg(_IA64_REG_AR_ITC);
70		ia64_barrier();
71	}
72#endif
73	return result;
74}
75
76extern void ia64_delay_loop (unsigned long loops);
77
78static __inline__ void
79__delay (unsigned long loops)
80{
81	if (unlikely(loops < 1))
82		return;
83
84	ia64_delay_loop (loops - 1);
85}
86
87extern void udelay (unsigned long usecs);
88
89#endif /* _ASM_IA64_DELAY_H */