1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * MTD primitives for XIP support. Architecture specific functions 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Do not include this file directly. It's included from linux/mtd/xip.h 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Author: Nicolas Pitre 8*4882a593Smuzhiyun * Created: Nov 2, 2004 9*4882a593Smuzhiyun * Copyright: (C) 2004 MontaVista Software, Inc. 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #ifndef __ARCH_PXA_MTD_XIP_H__ 13*4882a593Smuzhiyun #define __ARCH_PXA_MTD_XIP_H__ 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #include <mach/regs-ost.h> 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun /* restored July 2017, this did not build since 2011! */ 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun #define ICIP io_p2v(0x40d00000) 20*4882a593Smuzhiyun #define ICMR io_p2v(0x40d00004) 21*4882a593Smuzhiyun #define xip_irqpending() (readl(ICIP) & readl(ICMR)) 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun /* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */ 24*4882a593Smuzhiyun #define xip_currtime() readl(OSCR) 25*4882a593Smuzhiyun #define xip_elapsed_since(x) (signed)((readl(OSCR) - (x)) / 4) 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun /* 28*4882a593Smuzhiyun * xip_cpu_idle() is used when waiting for a delay equal or larger than 29*4882a593Smuzhiyun * the system timer tick period. This should put the CPU into idle mode 30*4882a593Smuzhiyun * to save power and to be woken up only when some interrupts are pending. 31*4882a593Smuzhiyun * As above, this should not rely upon standard kernel code. 32*4882a593Smuzhiyun */ 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun #define xip_cpu_idle() asm volatile ("mcr p14, 0, %0, c7, c0, 0" :: "r" (1)) 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun #endif /* __ARCH_PXA_MTD_XIP_H__ */ 37