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[MTD] XIP cleanup

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Move the architecture dependend code into include/asm/mtd-xip.h

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2005-07-07 16:50:16 +02:00 committed by Thomas Gleixner
parent b9c86d595d
commit 97f927a4d7
6 changed files with 104 additions and 20 deletions
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2
drivers/mtd/chips/cfi_cmdset_0001.c
View file

@ -845,7 +845,7 @@ static void __xipram xip_enable(struct map_info *map, struct flchip *chip,
chip->state = FL_READY;
}
(void) map_read(map, adr);
asm volatile (".rep 8; nop; .endr"); /* fill instruction prefetch */
xip_iprefetch();
local_irq_enable();
}

2
drivers/mtd/chips/cfi_cmdset_0002.c
View file

@ -600,7 +600,7 @@ static void __xipram xip_enable(struct map_info *map, struct flchip *chip,
chip->state = FL_READY;
}
(void) map_read(map, adr);
asm volatile (".rep 8; nop; .endr"); /* fill instruction prefetch */
xip_iprefetch();
local_irq_enable();
}

37
include/asm-arm/arch-pxa/mtd-xip.h Normal file
View file

@ -0,0 +1,37 @@
/*
* 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.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* $Id: xip.h,v 1.2 2004/12/01 15:49:10 nico Exp $
*/
#ifndef __ARCH_PXA_MTD_XIP_H__
#define __ARCH_PXA_MTD_XIP_H__
#include <asm/arch/pxa-regs.h>
#define xip_irqpending() (ICIP & ICMR)
/* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */
#define xip_currtime() (OSCR)
#define xip_elapsed_since(x) (signed)((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__ */

26
include/asm-arm/arch-sa1100/mtd-xip.h Normal file
View file

@ -0,0 +1,26 @@
/*
* 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.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* $Id: xip.h,v 1.2 2004/12/01 15:49:10 nico Exp $
*/
#ifndef __ARCH_SA1100_MTD_XIP_H__
#define __ARCH_SA1100_MTD_XIP_H__
#define xip_irqpending() (ICIP & ICMR)
/* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */
#define xip_currtime() (OSCR)
#define xip_elapsed_since(x) (signed)((OSCR - (x)) / 4)
#endif /* __ARCH_SA1100_MTD_XIP_H__ */

26
include/asm-arm/mtd-xip.h Normal file
View file

@ -0,0 +1,26 @@
/*
* 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.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* $Id: xip.h,v 1.2 2004/12/01 15:49:10 nico Exp $
*/
#ifndef __ARM_MTD_XIP_H__
#define __ARM_MTD_XIP_H__
#include <asm/hardware.h>
#include <asm/arch/mtd-xip.h>
/* fill instruction prefetch */
#define xip_iprefetch() do { asm volatile (".rep 8; nop; .endr"); } while (0)
#endif /* __ARM_MTD_XIP_H__ */

31
include/linux/mtd/xip.h
View file

@ -58,22 +58,16 @@
* returned value is <= the real elapsed time.
* note 2: this should be able to cope with a few seconds without
* overflowing.
*
* xip_iprefetch()
*
* Macro to fill instruction prefetch
* e.g. a series of nops: asm volatile (".rep 8; nop; .endr");
*/
#if defined(CONFIG_ARCH_SA1100) || defined(CONFIG_ARCH_PXA)
#include <asm/mtd-xip.h>
#include <asm/hardware.h>
#ifdef CONFIG_ARCH_PXA
#include <asm/arch/pxa-regs.h>
#endif
#define xip_irqpending() (ICIP & ICMR)
/* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */
#define xip_currtime() (OSCR)
#define xip_elapsed_since(x) (signed)((OSCR - (x)) / 4)
#else
#ifndef xip_irqpending
#warning "missing IRQ and timer primitives for XIP MTD support"
#warning "some of the XIP MTD support code will be disabled"
@ -85,16 +79,17 @@
#endif
#ifndef xip_iprefetch
#define xip_iprefetch() do { } while (0)
#endif
/*
* 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.
* This should not rely upon standard kernel code.
*/
#if defined(CONFIG_CPU_XSCALE)
#define xip_cpu_idle() asm volatile ("mcr p14, 0, %0, c7, c0, 0" :: "r" (1))
#else
#ifndef xip_cpu_idle
#define xip_cpu_idle() do { } while (0)
#endif