[mirror_ubuntu-zesty-kernel.git] / arch / arm / mach-pxa / include / mach / mtd-xip.h

/*
 * 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.
 */

#ifndef __ARCH_PXA_MTD_XIP_H__
#define __ARCH_PXA_MTD_XIP_H__

#include <mach/hardware.h>
#include <mach/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__ */
Commit	Line	Data
97f927a4 TG	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.
97f927a4 TG	13	*/
	14
	15	#ifndef __ARCH_PXA_MTD_XIP_H__
	16	#define __ARCH_PXA_MTD_XIP_H__
	17
a02f45cf	18	#include <mach/hardware.h>
a09e64fb	19	#include <mach/pxa-regs.h>
97f927a4 TG	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__ */