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mn10300: switch to GENERIC_PCI_IOMAP

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The pci_iomap variant that arch/mn10300/unit-asb2305/pci-iomap.c
uses differs from the generic one in that it does
not use ioremap_nocache for PCI addresses.
However, it turns out that PCI addresses are
automatically noncached, so switching to ioremap_nocache
and to the generic implementation is safe.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2011-12-01 12:41:36 +02:00
parent 2ebf5d0d79
commit 34f1bdee19
4 changed files with 2 additions and 33 deletions
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1
arch/mn10300/Kconfig
View File

@ -252,6 +252,7 @@ config PCI
bool "Use PCI"
depends on MN10300_UNIT_ASB2305
default y
select GENERIC_PCI_IOMAP
help
Some systems (such as the ASB2305) have PCI onboard. If you have one
of these boards and you wish to use the PCI facilities, say Y here.

1
arch/mn10300/include/asm/io.h
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@ -229,7 +229,6 @@ static inline void outsl(unsigned long addr, const void *buffer, int count)
/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
struct pci_dev;
extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p)
{
}

2
arch/mn10300/unit-asb2305/Makefile
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@ -5,4 +5,4 @@
###############################################################################
obj-y := unit-init.o leds.o
obj-$(CONFIG_PCI) += pci.o pci-asb2305.o pci-irq.o pci-iomap.o
obj-$(CONFIG_PCI) += pci.o pci-asb2305.o pci-irq.o

31
arch/mn10300/unit-asb2305/pci-iomap.c
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@ -1,31 +0,0 @@
/* ASB2305 PCI I/O mapping handler
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#include <linux/pci.h>
#include <linux/module.h>
/*
* Create a virtual mapping cookie for a PCI BAR (memory or IO)
*/
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
{
resource_size_t start = pci_resource_start(dev, bar);
resource_size_t len = pci_resource_len(dev, bar);
unsigned long flags = pci_resource_flags(dev, bar);
if (!len || !start)
return NULL;
if ((flags & IORESOURCE_IO) || (flags & IORESOURCE_MEM))
return (void __iomem *) start;
return NULL;
}
EXPORT_SYMBOL(pci_iomap);