From fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Wed, 23 Aug 2017 14:45:25 -0500 Subject: Initial import of modified Linux 2.6.28 tree Original upstream URL: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y --- arch/powerpc/include/asm/delay.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 arch/powerpc/include/asm/delay.h (limited to 'arch/powerpc/include/asm/delay.h') diff --git a/arch/powerpc/include/asm/delay.h b/arch/powerpc/include/asm/delay.h new file mode 100644 index 0000000..f9200a6 --- /dev/null +++ b/arch/powerpc/include/asm/delay.h @@ -0,0 +1,34 @@ +#ifndef _ASM_POWERPC_DELAY_H +#define _ASM_POWERPC_DELAY_H +#ifdef __KERNEL__ + +/* + * Copyright 1996, Paul Mackerras. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * PPC64 Support added by Dave Engebretsen, Todd Inglett, Mike Corrigan, + * Anton Blanchard. + */ + +extern void __delay(unsigned long loops); +extern void udelay(unsigned long usecs); + +/* + * On shared processor machines the generic implementation of mdelay can + * result in large errors. While each iteration of the loop inside mdelay + * is supposed to take 1ms, the hypervisor could sleep our partition for + * longer (eg 10ms). With the right timing these errors can add up. + * + * Since there is no 32bit overflow issue on 64bit kernels, just call + * udelay directly. + */ +#ifdef CONFIG_PPC64 +#define mdelay(n) udelay((n) * 1000) +#endif + +#endif /* __KERNEL__ */ +#endif /* _ASM_POWERPC_DELAY_H */ -- cgit v1.1