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mips: Use asm-generic/io.h

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Convert the mips architecture to make use of the new asm-generic/io.h to
provide address mapping functions. As mips actually performs
non-identity mapping between physical & virtual addresses we can't
simply make use of the generic functions, with the exception of being
able to drop our no-op unmap_physmem() and definitions of unused map
flags.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Acked-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
This commit is contained in:
Paul Burton 2017-09-14 15:05:10 -07:00 • committed by Tom Rini
parent e8645527b1
commit d1cbeafd5e
1 changed files with 6 additions and 11 deletions
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17
arch/mips/include/asm/io.h
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@ -95,6 +95,7 @@ static inline unsigned long virt_to_phys(volatile const void *address)
#endif
return CPHYSADDR(addr);
}
#define virt_to_phys virt_to_phys
/*
* phys_to_virt - map physical address to virtual
@ -112,6 +113,7 @@ static inline void *phys_to_virt(unsigned long address)
{
return (void *)(address + PAGE_OFFSET - PHYS_OFFSET);
}
#define phys_to_virt phys_to_virt
/*
* ISA I/O bus memory addresses are 1:1 with the physical address.
@ -490,10 +492,7 @@ static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int
*/
#define sync() mmiowb()
#define MAP_NOCACHE (1)
#define MAP_WRCOMBINE (0)
#define MAP_WRBACK (0)
#define MAP_WRTHROUGH (0)
#define MAP_NOCACHE 1
static inline void *
map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
@ -503,13 +502,7 @@ map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
return (void *)CKSEG0ADDR(paddr);
}
/*
* Take down a mapping set up by map_physmem().
*/
static inline void unmap_physmem(void *vaddr, unsigned long flags)
{
}
#define map_physmem map_physmem
#define __BUILD_CLRBITS(bwlq, sfx, end, type) \
\
@ -566,4 +559,6 @@ BUILD_CLRSETBITS(q, le64, le64, u64)
BUILD_CLRSETBITS(q, be64, be64, u64)
BUILD_CLRSETBITS(q, 64, _, u64)
#include <asm-generic/io.h>
#endif /* _ASM_IO_H */