| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * 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. |
| */ |
| |
| #ifndef __ARCH_PXA_MTD_XIP_H__ |
| #define __ARCH_PXA_MTD_XIP_H__ |
| |
| #include <mach/regs-ost.h> |
| |
| /* restored July 2017, this did not build since 2011! */ |
| |
| #define ICIP io_p2v(0x40d00000) |
| #define ICMR io_p2v(0x40d00004) |
| #define xip_irqpending() (readl(ICIP) & readl(ICMR)) |
| |
| /* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */ |
| #define xip_currtime() readl(OSCR) |
| #define xip_elapsed_since(x) (signed)((readl(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__ */ |
