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89 lines
1.7 KiB
89 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_IA64_DELAY_H |
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#define _ASM_IA64_DELAY_H |
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/* |
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* Delay routines using a pre-computed "cycles/usec" value. |
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* |
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* Copyright (C) 1998, 1999 Hewlett-Packard Co |
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* David Mosberger-Tang <[email protected]> |
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* Copyright (C) 1999 VA Linux Systems |
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* Copyright (C) 1999 Walt Drummond <[email protected]> |
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* Copyright (C) 1999 Asit Mallick <[email protected]> |
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* Copyright (C) 1999 Don Dugger <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/sched.h> |
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#include <linux/compiler.h> |
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#include <asm/intrinsics.h> |
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#include <asm/processor.h> |
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static __inline__ void |
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ia64_set_itm (unsigned long val) |
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{ |
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ia64_setreg(_IA64_REG_CR_ITM, val); |
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ia64_srlz_d(); |
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} |
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static __inline__ unsigned long |
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ia64_get_itm (void) |
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{ |
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unsigned long result; |
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result = ia64_getreg(_IA64_REG_CR_ITM); |
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ia64_srlz_d(); |
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return result; |
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} |
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static __inline__ void |
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ia64_set_itv (unsigned long val) |
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{ |
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ia64_setreg(_IA64_REG_CR_ITV, val); |
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ia64_srlz_d(); |
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} |
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static __inline__ unsigned long |
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ia64_get_itv (void) |
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{ |
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return ia64_getreg(_IA64_REG_CR_ITV); |
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} |
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static __inline__ void |
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ia64_set_itc (unsigned long val) |
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{ |
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ia64_setreg(_IA64_REG_AR_ITC, val); |
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ia64_srlz_d(); |
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} |
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static __inline__ unsigned long |
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ia64_get_itc (void) |
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{ |
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unsigned long result; |
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result = ia64_getreg(_IA64_REG_AR_ITC); |
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ia64_barrier(); |
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#ifdef CONFIG_ITANIUM |
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while (unlikely((__s32) result == -1)) { |
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result = ia64_getreg(_IA64_REG_AR_ITC); |
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ia64_barrier(); |
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} |
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#endif |
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return result; |
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} |
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extern void ia64_delay_loop (unsigned long loops); |
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static __inline__ void |
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__delay (unsigned long loops) |
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{ |
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if (unlikely(loops < 1)) |
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return; |
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ia64_delay_loop (loops - 1); |
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} |
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extern void udelay (unsigned long usecs); |
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#endif /* _ASM_IA64_DELAY_H */
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