18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-only */ 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * MTD primitives for XIP support. Architecture specific functions 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * Do not include this file directly. It's included from linux/mtd/xip.h 68c2ecf20Sopenharmony_ci * 78c2ecf20Sopenharmony_ci * Author: Nicolas Pitre 88c2ecf20Sopenharmony_ci * Created: Nov 2, 2004 98c2ecf20Sopenharmony_ci * Copyright: (C) 2004 MontaVista Software, Inc. 108c2ecf20Sopenharmony_ci */ 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ci#ifndef __ARCH_PXA_MTD_XIP_H__ 138c2ecf20Sopenharmony_ci#define __ARCH_PXA_MTD_XIP_H__ 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ci#include <mach/regs-ost.h> 168c2ecf20Sopenharmony_ci 178c2ecf20Sopenharmony_ci/* restored July 2017, this did not build since 2011! */ 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ci#define ICIP io_p2v(0x40d00000) 208c2ecf20Sopenharmony_ci#define ICMR io_p2v(0x40d00004) 218c2ecf20Sopenharmony_ci#define xip_irqpending() (readl(ICIP) & readl(ICMR)) 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_ci/* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */ 248c2ecf20Sopenharmony_ci#define xip_currtime() readl(OSCR) 258c2ecf20Sopenharmony_ci#define xip_elapsed_since(x) (signed)((readl(OSCR) - (x)) / 4) 268c2ecf20Sopenharmony_ci 278c2ecf20Sopenharmony_ci/* 288c2ecf20Sopenharmony_ci * xip_cpu_idle() is used when waiting for a delay equal or larger than 298c2ecf20Sopenharmony_ci * the system timer tick period. This should put the CPU into idle mode 308c2ecf20Sopenharmony_ci * to save power and to be woken up only when some interrupts are pending. 318c2ecf20Sopenharmony_ci * As above, this should not rely upon standard kernel code. 328c2ecf20Sopenharmony_ci */ 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ci#define xip_cpu_idle() asm volatile ("mcr p14, 0, %0, c7, c0, 0" :: "r" (1)) 358c2ecf20Sopenharmony_ci 368c2ecf20Sopenharmony_ci#endif /* __ARCH_PXA_MTD_XIP_H__ */ 37