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__ */ 37