diff options
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0001.c | 2 | ||||
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0002.c | 2 | ||||
| -rw-r--r-- | include/asm-arm/arch-pxa/mtd-xip.h | 37 | ||||
| -rw-r--r-- | include/asm-arm/arch-sa1100/mtd-xip.h | 26 | ||||
| -rw-r--r-- | include/asm-arm/mtd-xip.h | 26 | ||||
| -rw-r--r-- | include/linux/mtd/xip.h | 31 |
6 files changed, 104 insertions, 20 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index 8b1304531d8f..0cfcd88468e0 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -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(); } diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c index c76c30de48fb..8505f118f2db 100644 --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -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(); } diff --git a/include/asm-arm/arch-pxa/mtd-xip.h b/include/asm-arm/arch-pxa/mtd-xip.h new file mode 100644 index 000000000000..8704dbceb432 --- /dev/null +++ b/include/asm-arm/arch-pxa/mtd-xip.h @@ -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__ */ diff --git a/include/asm-arm/arch-sa1100/mtd-xip.h b/include/asm-arm/arch-sa1100/mtd-xip.h new file mode 100644 index 000000000000..80cfdac2b944 --- /dev/null +++ b/include/asm-arm/arch-sa1100/mtd-xip.h @@ -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__ */ diff --git a/include/asm-arm/mtd-xip.h b/include/asm-arm/mtd-xip.h new file mode 100644 index 000000000000..9eb127cc7db2 --- /dev/null +++ b/include/asm-arm/mtd-xip.h @@ -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__ */ diff --git a/include/linux/mtd/xip.h b/include/linux/mtd/xip.h index fc071125cbcc..7b7deef6b180 100644 --- a/include/linux/mtd/xip.h +++ b/include/linux/mtd/xip.h @@ -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/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) +#include <asm/mtd-xip.h> -#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 |