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/arch/arm/mach-pxa/include/mach/mtd-xip.h

https://github.com/AICP/kernel_asus_grouper
C Header | 36 lines | 9 code | 7 blank | 20 comment | 0 complexity | 1464aa5db715cb96c21c762a9c04c3b1 MD5 | raw file
 1/*
 2 * MTD primitives for XIP support. Architecture specific functions
 3 *
 4 * Do not include this file directly. It's included from linux/mtd/xip.h
 5 * 
 6 * Author:	Nicolas Pitre
 7 * Created:	Nov 2, 2004
 8 * Copyright:	(C) 2004 MontaVista Software, Inc.
 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#ifndef __ARCH_PXA_MTD_XIP_H__
16#define __ARCH_PXA_MTD_XIP_H__
17
18#include <mach/regs-ost.h>
19#include <mach/regs-intc.h>
20
21#define xip_irqpending()	(ICIP & ICMR)
22
23/* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */
24#define xip_currtime()		(OSCR)
25#define xip_elapsed_since(x)	(signed)((OSCR - (x)) / 4)
26
27/*
28 * xip_cpu_idle() is used when waiting for a delay equal or larger than
29 * the system timer tick period.  This should put the CPU into idle mode
30 * to save power and to be woken up only when some interrupts are pending.
31 * As above, this should not rely upon standard kernel code.
32 */
33
34#define xip_cpu_idle()  asm volatile ("mcr p14, 0, %0, c7, c0, 0" :: "r" (1))
35
36#endif /* __ARCH_PXA_MTD_XIP_H__ */