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| 2 | |
| 3 | * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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| 4 | *
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| 5 | * vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs
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| 6 | * -flush_cache_dup_mm (fork)
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| 7 | * -likewise for flush_cache_mm (exit/execve)
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| 8 | * -likewise for flush_cache_{range,page} (munmap, exit, COW-break)
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| 9 | *
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| 10 | * vineetg: April 2008
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| 11 | * -Added a critical CacheLine flush to copy_to_user_page( ) which
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| 12 | * was causing gdbserver to not setup breakpoints consistently
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| 13 |
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| 14 |
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| 15 | #ifndef _ASM_CACHEFLUSH_H
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| 16 | #define _ASM_CACHEFLUSH_H
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| 17 |
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| 18 | #include <linux/mm.h>
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| 19 | #include <asm/shmparam.h>
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| 20 |
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| 21 | void flush_cache_all(void);
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| 22 |
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| 23 | void flush_icache_range(unsigned long kstart, unsigned long kend);
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| 24 | void __sync_icache_dcache(phys_addr_t paddr, unsigned long vaddr, int len);
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| 25 | void __inv_icache_pages(phys_addr_t paddr, unsigned long vaddr, unsigned nr);
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| 26 | void __flush_dcache_pages(phys_addr_t paddr, unsigned long vaddr, unsigned nr);
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| 27 |
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| 28 | #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
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| 29 |
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| 30 | void flush_dcache_page(struct page *page);
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| 31 | void flush_dcache_folio(struct folio *folio);
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| 32 | #define flush_dcache_folio flush_dcache_folio
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| 33 |
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| 34 | void dma_cache_wback_inv(phys_addr_t start, unsigned long sz);
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| 35 | void dma_cache_inv(phys_addr_t start, unsigned long sz);
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| 36 | void dma_cache_wback(phys_addr_t start, unsigned long sz);
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| 37 |
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| 38 | #define flush_dcache_mmap_lock(mapping) do { } while (0)
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| 39 | #define flush_dcache_mmap_unlock(mapping) do { } while (0)
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| 40 |
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| 41 |
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| 42 | #define flush_cache_vmap(start, end) flush_cache_all()
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| 43 | #define flush_cache_vmap_early(start, end) do { } while (0)
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| 44 | #define flush_cache_vunmap(start, end) flush_cache_all()
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| 45 |
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| 46 | #define flush_cache_dup_mm(mm)
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| 47 |
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| 48 | #define flush_cache_mm(mm)
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| 49 | #define flush_cache_range(mm, u_vstart, u_vend)
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| 50 | #define flush_cache_page(vma, u_vaddr, pfn)
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| 51 |
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| 52 | |
| 53 | * A new pagecache page has PG_arch_1 clear - thus dcache dirty by default
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| 54 | * This works around some PIO based drivers which don't call flush_dcache_page
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| 55 | * to record that they dirtied the dcache
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| 56 |
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| 57 | #define PG_dc_clean PG_arch_1
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| 58 |
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| 59 | #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
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| 60 | do { \
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| 61 | memcpy(dst, src, len); \
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| 62 | if (vma->vm_flags & VM_EXEC) \
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| 63 | __sync_icache_dcache((unsigned long)(dst), vaddr, len); \
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| 64 | } while (0)
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| 65 |
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| 66 | #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
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| 67 | memcpy(dst, src, len); \
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| 68 |
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| 69 | #endif
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