| Thomas Gleixner | 97f927a | 2005-07-07 16:50:16 +0200 | [diff] [blame] | 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 | * $Id: xip.h,v 1.2 2004/12/01 15:49:10 nico Exp $ |
| 15 | */ |
| 16 | |
| 17 | #ifndef __ARCH_PXA_MTD_XIP_H__ |
| 18 | #define __ARCH_PXA_MTD_XIP_H__ |
| 19 | |
| 20 | #include <asm/arch/pxa-regs.h> |
| 21 | |
| 22 | #define xip_irqpending() (ICIP & ICMR) |
| 23 | |
| 24 | /* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */ |
| 25 | #define xip_currtime() (OSCR) |
| 26 | #define xip_elapsed_since(x) (signed)((OSCR - (x)) / 4) |
| 27 | |
| 28 | /* |
| 29 | * xip_cpu_idle() is used when waiting for a delay equal or larger than |
| 30 | * the system timer tick period. This should put the CPU into idle mode |
| 31 | * to save power and to be woken up only when some interrupts are pending. |
| 32 | * As above, this should not rely upon standard kernel code. |
| 33 | */ |
| 34 | |
| 35 | #define xip_cpu_idle() asm volatile ("mcr p14, 0, %0, c7, c0, 0" :: "r" (1)) |
| 36 | |
| 37 | #endif /* __ARCH_PXA_MTD_XIP_H__ */ |