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| author | Max Filippov <jcmvbkbc@gmail.com> | 2015-10-09 02:44:23 +0300 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2015-11-09 01:25:37 +0300 |
| commit | c7ca9fe17b84719ef2edbe854e1b0cac04a91e2f (patch) | |
| tree | af1d9766ac0e0c5749cae43412245cf0e918ae31 /arch/xtensa/include | |
| parent | e2b31f75406ed4ae700f5d954603f8119d9e94ca (diff) | |
| download | linux-c7ca9fe17b84719ef2edbe854e1b0cac04a91e2f.tar.xz | |
xtensa: support DMA to high memory
- don't bugcheck if high memory page is passed to xtensa_map_page;
- turn empty dcache flush macros into functions so that they could be
passed as function parameters;
- use kmap_atomic to map high memory pages for cache invalidation/
flushing performed by xtensa_sync_single_for_{cpu,device}.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/include')
| -rw-r--r-- | arch/xtensa/include/asm/cacheflush.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/arch/xtensa/include/asm/cacheflush.h b/arch/xtensa/include/asm/cacheflush.h index 7158881771ac..397d6a1a4224 100644 --- a/arch/xtensa/include/asm/cacheflush.h +++ b/arch/xtensa/include/asm/cacheflush.h @@ -55,9 +55,14 @@ extern void __flush_dcache_range(unsigned long, unsigned long); extern void __flush_invalidate_dcache_page(unsigned long); extern void __flush_invalidate_dcache_range(unsigned long, unsigned long); #else -# define __flush_dcache_range(p,s) do { } while(0) -# define __flush_dcache_page(p) do { } while(0) -# define __flush_invalidate_dcache_page(p) __invalidate_dcache_page(p) +static inline void __flush_dcache_page(unsigned long va) +{ +} +static inline void __flush_dcache_range(unsigned long va, unsigned long sz) +{ +} +# define __flush_invalidate_dcache_all() __invalidate_dcache_all() +# define __flush_invalidate_dcache_page(p) __invalidate_dcache_page(p) # define __flush_invalidate_dcache_range(p,s) __invalidate_dcache_range(p,s) #endif |