mtd-xip.h
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- /*
- * MTD primitives for XIP support. Architecture specific functions
- *
- * Do not include this file directly. It's included from linux/mtd/xip.h
- *
- * Author: Nicolas Pitre
- * Created: Nov 2, 2004
- * Copyright: (C) 2004 MontaVista Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * $Id: xip.h,v 1.2 2004/12/01 15:49:10 nico Exp $
- */
- #ifndef __ARCH_PXA_MTD_XIP_H__
- #define __ARCH_PXA_MTD_XIP_H__
- #include <asm/arch/pxa-regs.h>
- #define xip_irqpending() (ICIP & ICMR)
- /* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */
- #define xip_currtime() (OSCR)
- #define xip_elapsed_since(x) (signed)((OSCR - (x)) / 4)
- /*
- * xip_cpu_idle() is used when waiting for a delay equal or larger than
- * the system timer tick period. This should put the CPU into idle mode
- * to save power and to be woken up only when some interrupts are pending.
- * As above, this should not rely upon standard kernel code.
- */
- #define xip_cpu_idle() asm volatile ("mcr p14, 0, %0, c7, c0, 0" :: "r" (1))
- #endif /* __ARCH_PXA_MTD_XIP_H__ */