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nds32: Use asm-generic/io.h

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Convert the nds32 architecture to make use of the new asm-generic/io.h
to provide address mapping functions. As the generic implementations are
suitable for nds32 this is primarily a matter of removing code.

Feedback from architecture maintainers is welcome.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Macpaul Lin <macpaul@andestech.com>
This commit is contained in:
Paul Burton 2017-09-14 15:05:06 -07:00 committed by Tom Rini
parent dbee715237
commit b3666a693a
1 changed files with 3 additions and 29 deletions
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32
arch/nds32/include/asm/io.h
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@ -38,16 +38,6 @@ static inline void sync(void)
{
}
/*
* Given a physical address and a length, return a virtual address
* that can be used to access the memory range with the caching
* properties specified by "flags".
*/
#define MAP_NOCACHE (0)
#define MAP_WRCOMBINE (0)
#define MAP_WRBACK (0)
#define MAP_WRTHROUGH (0)
#ifdef CONFIG_ARCH_MAP_SYSMEM
static inline void *map_sysmem(phys_addr_t paddr, unsigned long len)
{
@ -69,25 +59,6 @@ static inline phys_addr_t map_to_sysmem(const void *ptr)
}
#endif
static inline void *
map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
{
return (void *)paddr;
}
/*
* Take down a mapping set up by map_physmem().
*/
static inline void unmap_physmem(void *vaddr, unsigned long flags)
{
}
static inline phys_addr_t virt_to_phys(void *vaddr)
{
return (phys_addr_t)(vaddr);
}
/*
* Generic virtual read/write. Note that we don't support half-word
* read/writes. We define __arch_*[bl] here, and leave __arch_*w
@ -480,5 +451,8 @@ out:
#define isa_check_signature(io, sig, len) (0)
#endif /* __mem_isa */
#include <asm-generic/io.h>
#endif /* __KERNEL__ */
#endif /* __ASM_NDS_IO_H */