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nios2: Use asm-generic/io.h

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Convert the nios2 architecture to make use of the new asm-generic/io.h to
provide address mapping functions. As nios2 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.

Feedback from architecture maintainers is welcome.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Thomas Chou <thomas@wytron.com.tw>
This commit is contained in:
Paul Burton 2017-09-14 15:05:11 -07:00 • committed by Tom Rini
parent d1cbeafd5e
commit e16986c481
1 changed files with 8 additions and 7 deletions
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15
arch/nios2/include/asm/io.h
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@ -19,9 +19,6 @@ static inline void sync(void)
* properties specified by "flags".
*/
#define MAP_NOCACHE 1
#define MAP_WRCOMBINE 0
#define MAP_WRBACK 0
#define MAP_WRTHROUGH 0
static inline void *
map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
@ -32,20 +29,22 @@ map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
else
return (void *)(paddr | gd->arch.mem_region_base);
}
#define map_physmem map_physmem
/*
* Take down a mapping set up by map_physmem().
*/
static inline void unmap_physmem(void *vaddr, unsigned long flags)
static inline void *phys_to_virt(phys_addr_t paddr)
{
DECLARE_GLOBAL_DATA_PTR;
return (void *)(paddr | gd->arch.mem_region_base);
}
#define phys_to_virt phys_to_virt
static inline phys_addr_t virt_to_phys(void * vaddr)
{
DECLARE_GLOBAL_DATA_PTR;
return (phys_addr_t)vaddr & gd->arch.physaddr_mask;
}
#define virt_to_phys virt_to_phys
#define __raw_writeb(v,a) (*(volatile unsigned char *)(a) = (v))
#define __raw_writew(v,a) (*(volatile unsigned short *)(a) = (v))
@ -171,4 +170,6 @@ static inline void outsl (unsigned long port, const void *src, unsigned long cou
#define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
#define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
#include <asm-generic/io.h>
#endif /* __ASM_NIOS2_IO_H_ */