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184 lines
5.8 KiB
184 lines
5.8 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* (C) 2001 - 2013 Tensilica Inc. |
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*/ |
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#ifndef _XTENSA_CACHEFLUSH_H |
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#define _XTENSA_CACHEFLUSH_H |
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#include <linux/mm.h> |
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#include <asm/processor.h> |
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#include <asm/page.h> |
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/* |
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* Lo-level routines for cache flushing. |
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* |
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* invalidate data or instruction cache: |
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* |
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* __invalidate_icache_all() |
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* __invalidate_icache_page(adr) |
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* __invalidate_dcache_page(adr) |
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* __invalidate_icache_range(from,size) |
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* __invalidate_dcache_range(from,size) |
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* |
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* flush data cache: |
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* |
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* __flush_dcache_page(adr) |
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* |
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* flush and invalidate data cache: |
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* |
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* __flush_invalidate_dcache_all() |
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* __flush_invalidate_dcache_page(adr) |
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* __flush_invalidate_dcache_range(from,size) |
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* |
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* specials for cache aliasing: |
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* |
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* __flush_invalidate_dcache_page_alias(vaddr,paddr) |
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* __invalidate_dcache_page_alias(vaddr,paddr) |
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* __invalidate_icache_page_alias(vaddr,paddr) |
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*/ |
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extern void __invalidate_dcache_all(void); |
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extern void __invalidate_icache_all(void); |
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extern void __invalidate_dcache_page(unsigned long); |
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extern void __invalidate_icache_page(unsigned long); |
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extern void __invalidate_icache_range(unsigned long, unsigned long); |
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extern void __invalidate_dcache_range(unsigned long, unsigned long); |
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#if XCHAL_DCACHE_IS_WRITEBACK |
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extern void __flush_invalidate_dcache_all(void); |
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extern void __flush_dcache_page(unsigned long); |
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extern void __flush_dcache_range(unsigned long, unsigned long); |
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extern void __flush_invalidate_dcache_page(unsigned long); |
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extern void __flush_invalidate_dcache_range(unsigned long, unsigned long); |
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#else |
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static inline void __flush_dcache_page(unsigned long va) |
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{ |
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} |
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static inline void __flush_dcache_range(unsigned long va, unsigned long sz) |
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{ |
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} |
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# define __flush_invalidate_dcache_all() __invalidate_dcache_all() |
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# define __flush_invalidate_dcache_page(p) __invalidate_dcache_page(p) |
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# define __flush_invalidate_dcache_range(p,s) __invalidate_dcache_range(p,s) |
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#endif |
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#if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE) |
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extern void __flush_invalidate_dcache_page_alias(unsigned long, unsigned long); |
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extern void __invalidate_dcache_page_alias(unsigned long, unsigned long); |
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#else |
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static inline void __flush_invalidate_dcache_page_alias(unsigned long virt, |
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unsigned long phys) { } |
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static inline void __invalidate_dcache_page_alias(unsigned long virt, |
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unsigned long phys) { } |
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#endif |
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#if defined(CONFIG_MMU) && (ICACHE_WAY_SIZE > PAGE_SIZE) |
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extern void __invalidate_icache_page_alias(unsigned long, unsigned long); |
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#else |
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static inline void __invalidate_icache_page_alias(unsigned long virt, |
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unsigned long phys) { } |
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#endif |
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/* |
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* We have physically tagged caches - nothing to do here - |
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* unless we have cache aliasing. |
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* |
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* Pages can get remapped. Because this might change the 'color' of that page, |
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* we have to flush the cache before the PTE is changed. |
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* (see also Documentation/core-api/cachetlb.rst) |
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*/ |
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#if defined(CONFIG_MMU) && \ |
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((DCACHE_WAY_SIZE > PAGE_SIZE) || defined(CONFIG_SMP)) |
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#ifdef CONFIG_SMP |
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void flush_cache_all(void); |
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void flush_cache_range(struct vm_area_struct*, ulong, ulong); |
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void flush_icache_range(unsigned long start, unsigned long end); |
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void flush_cache_page(struct vm_area_struct*, |
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unsigned long, unsigned long); |
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#else |
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#define flush_cache_all local_flush_cache_all |
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#define flush_cache_range local_flush_cache_range |
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#define flush_icache_range local_flush_icache_range |
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#define flush_cache_page local_flush_cache_page |
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#endif |
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#define local_flush_cache_all() \ |
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do { \ |
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__flush_invalidate_dcache_all(); \ |
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__invalidate_icache_all(); \ |
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} while (0) |
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#define flush_cache_mm(mm) flush_cache_all() |
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#define flush_cache_dup_mm(mm) flush_cache_mm(mm) |
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#define flush_cache_vmap(start,end) flush_cache_all() |
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#define flush_cache_vunmap(start,end) flush_cache_all() |
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 |
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extern void flush_dcache_page(struct page*); |
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void local_flush_cache_range(struct vm_area_struct *vma, |
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unsigned long start, unsigned long end); |
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void local_flush_cache_page(struct vm_area_struct *vma, |
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unsigned long address, unsigned long pfn); |
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#else |
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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_vmap(start,end) do { } while (0) |
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#define flush_cache_vunmap(start,end) do { } while (0) |
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 |
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#define flush_dcache_page(page) do { } while (0) |
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#define flush_icache_range local_flush_icache_range |
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#define flush_cache_page(vma, addr, pfn) do { } while (0) |
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#define flush_cache_range(vma, start, end) do { } while (0) |
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#endif |
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#define flush_icache_user_range flush_icache_range |
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/* Ensure consistency between data and instruction cache. */ |
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#define local_flush_icache_range(start, end) \ |
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do { \ |
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__flush_dcache_range(start, (end) - (start)); \ |
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__invalidate_icache_range(start,(end) - (start)); \ |
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} while (0) |
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/* This is not required, see Documentation/core-api/cachetlb.rst */ |
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#define flush_icache_page(vma,page) do { } while (0) |
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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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#if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE) |
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extern void copy_to_user_page(struct vm_area_struct*, struct page*, |
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unsigned long, void*, const void*, unsigned long); |
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extern void copy_from_user_page(struct vm_area_struct*, struct page*, |
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unsigned long, void*, const void*, unsigned long); |
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#else |
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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_dcache_range((unsigned long) dst, len); \ |
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__invalidate_icache_range((unsigned long) dst, 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 |
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#endif /* _XTENSA_CACHEFLUSH_H */
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