projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
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 | ||
| 1da177e4 LT |
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 | ||
| 23 | static __inline__ void | |
| 24 | ia64_set_itm (unsigned long val) | |
| 25 | { | |
| 26 | ia64_setreg(_IA64_REG_CR_ITM, val); | |
| 27 | ia64_srlz_d(); | |
| 28 | } | |
| 29 | ||
| 30 | static __inline__ unsigned long | |
| 31 | ia64_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 | ||
| 40 | static __inline__ void | |
| 41 | ia64_set_itv (unsigned long val) | |
| 42 | { | |
| 43 | ia64_setreg(_IA64_REG_CR_ITV, val); | |
| 44 | ia64_srlz_d(); | |
| 45 | } | |
| 46 | ||
| 47 | static __inline__ unsigned long | |
| 48 | ia64_get_itv (void) | |
| 49 | { | |
| 50 | return ia64_getreg(_IA64_REG_CR_ITV); | |
| 51 | } | |
| 52 | ||
| 53 | static __inline__ void | |
| 54 | ia64_set_itc (unsigned long val) | |
| 55 | { | |
| 56 | ia64_setreg(_IA64_REG_AR_ITC, val); | |
| 57 | ia64_srlz_d(); | |
| 58 | } | |
| 59 | ||
| 60 | static __inline__ unsigned long | |
| 61 | ia64_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 | ||
| 76 | extern void ia64_delay_loop (unsigned long loops); | |
| 77 | ||
| 78 | static __inline__ void | |
| 79 | __delay (unsigned long loops) | |
| 80 | { | |
| 81 | if (unlikely(loops < 1)) | |
| 82 | return; | |
| 83 | ||
| 84 | ia64_delay_loop (loops - 1); | |
| 85 | } | |
| 86 | ||
| f5899b5d | 87 | extern void udelay (unsigned long usecs); |
| 1da177e4 LT |
88 | |
| 89 | #endif /* _ASM_IA64_DELAY_H */ |