1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * MTD primitives for XIP support. Architecture specific functions
4 *
5 * Do not include this file directly. It's included from linux/mtd/xip.h
6 *
7 * Author:	Nicolas Pitre
8 * Created:	Nov 2, 2004
9 * Copyright:	(C) 2004 MontaVista Software, Inc.
10 */
11
12#ifndef __ARCH_PXA_MTD_XIP_H__
13#define __ARCH_PXA_MTD_XIP_H__
14
15#include <mach/regs-ost.h>
16
17/* restored July 2017, this did not build since 2011! */
18
19#define ICIP			io_p2v(0x40d00000)
20#define ICMR			io_p2v(0x40d00004)
21#define xip_irqpending()	(readl(ICIP) & readl(ICMR))
22
23/* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */
24#define xip_currtime()		readl(OSCR)
25#define xip_elapsed_since(x)	(signed)((readl(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