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1da177e4 LT |
1 | #ifndef _ASM_IA64_DELAY_H |
2 | #define _ASM_IA64_DELAY_H | |
3 | ||
4 | /* | |
5 | * Delay routines using a pre-computed "cycles/usec" value. | |
6 | * | |
7 | * Copyright (C) 1998, 1999 Hewlett-Packard Co | |
8 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
9 | * Copyright (C) 1999 VA Linux Systems | |
10 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> | |
11 | * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com> | |
12 | * Copyright (C) 1999 Don Dugger <don.dugger@intel.com> | |
13 | */ | |
14 | ||
1da177e4 LT |
15 | #include <linux/kernel.h> |
16 | #include <linux/sched.h> | |
17 | #include <linux/compiler.h> | |
18 | ||
19 | #include <asm/intrinsics.h> | |
20 | #include <asm/processor.h> | |
21 | ||
22 | static __inline__ void | |
23 | ia64_set_itm (unsigned long val) | |
24 | { | |
25 | ia64_setreg(_IA64_REG_CR_ITM, val); | |
26 | ia64_srlz_d(); | |
27 | } | |
28 | ||
29 | static __inline__ unsigned long | |
30 | ia64_get_itm (void) | |
31 | { | |
32 | unsigned long result; | |
33 | ||
34 | result = ia64_getreg(_IA64_REG_CR_ITM); | |
35 | ia64_srlz_d(); | |
36 | return result; | |
37 | } | |
38 | ||
39 | static __inline__ void | |
40 | ia64_set_itv (unsigned long val) | |
41 | { | |
42 | ia64_setreg(_IA64_REG_CR_ITV, val); | |
43 | ia64_srlz_d(); | |
44 | } | |
45 | ||
46 | static __inline__ unsigned long | |
47 | ia64_get_itv (void) | |
48 | { | |
49 | return ia64_getreg(_IA64_REG_CR_ITV); | |
50 | } | |
51 | ||
52 | static __inline__ void | |
53 | ia64_set_itc (unsigned long val) | |
54 | { | |
55 | ia64_setreg(_IA64_REG_AR_ITC, val); | |
56 | ia64_srlz_d(); | |
57 | } | |
58 | ||
59 | static __inline__ unsigned long | |
60 | ia64_get_itc (void) | |
61 | { | |
62 | unsigned long result; | |
63 | ||
64 | result = ia64_getreg(_IA64_REG_AR_ITC); | |
65 | ia64_barrier(); | |
66 | #ifdef CONFIG_ITANIUM | |
67 | while (unlikely((__s32) result == -1)) { | |
68 | result = ia64_getreg(_IA64_REG_AR_ITC); | |
69 | ia64_barrier(); | |
70 | } | |
71 | #endif | |
72 | return result; | |
73 | } | |
74 | ||
75 | extern void ia64_delay_loop (unsigned long loops); | |
76 | ||
77 | static __inline__ void | |
78 | __delay (unsigned long loops) | |
79 | { | |
80 | if (unlikely(loops < 1)) | |
81 | return; | |
82 | ||
83 | ia64_delay_loop (loops - 1); | |
84 | } | |
85 | ||
f5899b5d | 86 | extern void udelay (unsigned long usecs); |
1da177e4 LT |
87 | |
88 | #endif /* _ASM_IA64_DELAY_H */ |