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x86: change ioremap() to default to uncached

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Prepare ioremap() to default to uncached. This will be the
safest - but first we have to fix CPA.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2008-01-30 13:33:40 +01:00
parent 5a96f4a55c
commit 6371b49599
2 changed files with 29 additions and 9 deletions
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15
include/asm-x86/io_32.h
View file

@ -111,18 +111,27 @@ extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsign
* make bus memory CPU accessible via the readb/readw/readl/writeb/
* writew/writel functions and the other mmio helpers. The returned
* address is not guaranteed to be usable directly as a virtual
* address.
* address.
*
* If the area you are trying to map is a PCI BAR you should have a
* look at pci_iomap().
*/
extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size);
static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
static inline void __iomem *
ioremap_cache(unsigned long offset, unsigned long size)
{
return __ioremap(offset, size, 0);
}
extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size);
/*
* The default ioremap() behavior is non-cached:
*/
static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
{
return ioremap_nocache(offset, size);
}
extern void iounmap(volatile void __iomem *addr);
/*

23
include/asm-x86/io_64.h
View file

@ -152,11 +152,6 @@ static inline void * phys_to_virt(unsigned long address)
extern void __iomem *__ioremap(unsigned long offset, unsigned long size, unsigned long flags);
static inline void __iomem * ioremap (unsigned long offset, unsigned long size)
{
return __ioremap(offset, size, 0);
}
extern void *early_ioremap(unsigned long addr, unsigned long size);
extern void early_iounmap(void *addr, unsigned long size);
@ -165,8 +160,24 @@ extern void early_iounmap(void *addr, unsigned long size);
* it's useful if some control registers are in such an area and write combining
* or read caching is not desirable:
*/
extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size);
static inline void __iomem *
ioremap_cache(unsigned long offset, unsigned long size)
{
return __ioremap(offset, size, 0);
}
/*
* The default ioremap() behavior is non-cached:
*/
static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
{
return ioremap_cache(offset, size);
}
extern void iounmap(volatile void __iomem *addr);
extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
/*