Commit 02f37748 authored by Max Filippov's avatar Max Filippov Committed by Chris Zankel
Browse files

xtensa: fix ioremap 



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

Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
Signed-off-by: default avatarChris Zankel <chris@zankel.net>
parent af42e970

arch/xtensa/include/asm/io.h

+14 −6
Original line number Diff line number Diff line
@@ -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)

{

}