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powerpc: use asm-generic/cacheflush.h
Power needs almost no cache flushing routines of its own. Rely on asm-generic/cacheflush.h for the defaults. Also remove the pointless __KERNEL__ ifdef while we're at it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Link: http://lkml.kernel.org/r/20200515143646.3857579-17-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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1 changed files with 10 additions and 32 deletions
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@ -4,23 +4,9 @@
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#ifndef _ASM_POWERPC_CACHEFLUSH_H
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#define _ASM_POWERPC_CACHEFLUSH_H
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#ifdef __KERNEL__
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#include <linux/mm.h>
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#include <asm/cputable.h>
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/*
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* No cache flushing is required when address mappings are changed,
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* because the caches on PowerPCs are physically addressed.
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*/
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#define flush_cache_all() do { } while (0)
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#define flush_cache_mm(mm) do { } while (0)
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#define flush_cache_dup_mm(mm) do { } while (0)
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#define flush_cache_range(vma, start, end) do { } while (0)
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#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
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#define flush_icache_page(vma, page) do { } while (0)
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#define flush_cache_vunmap(start, end) do { } while (0)
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#ifdef CONFIG_PPC_BOOK3S_64
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/*
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* Book3s has no ptesync after setting a pte, so without this ptesync it's
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@ -33,20 +19,20 @@ static inline void flush_cache_vmap(unsigned long start, unsigned long end)
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{
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asm volatile("ptesync" ::: "memory");
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}
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#else
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static inline void flush_cache_vmap(unsigned long start, unsigned long end) { }
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#endif
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#define flush_cache_vmap flush_cache_vmap
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#endif /* CONFIG_PPC_BOOK3S_64 */
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
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extern void flush_dcache_page(struct page *page);
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#define flush_dcache_mmap_lock(mapping) do { } while (0)
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#define flush_dcache_mmap_unlock(mapping) do { } while (0)
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void flush_icache_range(unsigned long start, unsigned long stop);
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extern void flush_icache_user_range(struct vm_area_struct *vma,
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struct page *page, unsigned long addr,
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int len);
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extern void flush_dcache_icache_page(struct page *page);
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#define flush_icache_range flush_icache_range
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void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
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unsigned long addr, int len);
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#define flush_icache_user_range flush_icache_user_range
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void flush_dcache_icache_page(struct page *page);
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void __flush_dcache_icache(void *page);
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/**
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@ -111,14 +97,6 @@ static inline void invalidate_dcache_range(unsigned long start,
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mb(); /* sync */
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}
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#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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memcpy(dst, src, len); \
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flush_icache_user_range(vma, page, vaddr, len); \
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} while (0)
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#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
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memcpy(dst, src, len)
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#endif /* __KERNEL__ */
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#include <asm-generic/cacheflush.h>
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#endif /* _ASM_POWERPC_CACHEFLUSH_H */
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