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xtensa: fix ioremap 

- fix ioremap_nocache to actually return non-cacheable address
- add explicit ioremap_cache
- fix KIO aperture checking arithmetic

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
This commit is contained in:
Max Filippov 2012-09-17 05:44:39 +04:00 committed by Chris Zankel
parent af42e970b6
commit 02f3774877
1 changed files with 14 additions and 6 deletions
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20
arch/xtensa/include/asm/io.h
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@ -67,12 +67,12 @@ static inline void * phys_to_virt(unsigned long address)
* Return the virtual (cached) address for the specified bus memory.
* Note that we currently don't support any address outside the KIO segment.
*/
static inline void *ioremap(unsigned long offset, unsigned long size)
static inline void __iomem *ioremap_nocache(unsigned long offset,
unsigned long size)
{
#ifdef CONFIG_MMU
if (offset >= XCHAL_KIO_PADDR
&& offset < XCHAL_KIO_PADDR + XCHAL_KIO_SIZE)
&& offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
else
BUG();
@ -81,11 +81,12 @@ static inline void *ioremap(unsigned long offset, unsigned long size)
#endif
}
static inline void *ioremap_nocache(unsigned long offset, unsigned long size)
static inline void __iomem *ioremap_cache(unsigned long offset,
unsigned long size)
{
#ifdef CONFIG_MMU
if (offset >= XCHAL_KIO_PADDR
&& offset < XCHAL_KIO_PADDR + XCHAL_KIO_SIZE)
&& offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
else
BUG();
@ -94,7 +95,14 @@ static inline void *ioremap_nocache(unsigned long offset, unsigned long size)
#endif
}
static inline void iounmap(void *addr)
#define ioremap_wc ioremap_nocache
static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
{
return ioremap_nocache(offset, size);
}
static inline void iounmap(volatile void __iomem *addr)
{
}