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/*
* arch/arm/mach-tegra/include/mach/delay.h
*
* Copyright (C) 2010 Google, Inc.
*
* Author:
* Colin Cross <ccross@google.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __MACH_TEGRA_DELAY_H
#define __MACH_TEGRA_DELAY_H
/* needed by loops_per_jiffy calculations */
extern void __delay(int loops);
extern void __udelay(unsigned long usecs);
extern void __const_udelay(unsigned long usecs);
/* we don't have any restrictions on maximum udelay length, but we'll enforce
* the same restriction as the ARM default so we don't introduce any
* incompatibilties in drivers.
*/
extern void __bad_udelay(void);
#define MAX_UDELAY_MS 2
#define udelay(n) \
((__builtin_constant_p(n) && (n) > (MAX_UDELAY_MS * 1000)) ? \
__bad_udelay() : \
__udelay(n))
#endif /* defined(__MACH_TEGRA_DELAY_H) */
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