95d6976d20
* ARC700 has VIPT L1 Caches * Caches don't snoop and are not coherent * Given the PAGE_SIZE and Cache associativity, we don't support aliasing D$ configurations (yet), but do allow aliasing I$ configs Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs
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* -flush_cache_dup_mm (fork)
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* -likewise for flush_cache_mm (exit/execve)
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* -likewise for flush_cache_{range,page} (munmap, exit, COW-break)
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*
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* vineetg: April 2008
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* -Added a critical CacheLine flush to copy_to_user_page( ) which
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* was causing gdbserver to not setup breakpoints consistently
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*/
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#ifndef _ASM_CACHEFLUSH_H
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#define _ASM_CACHEFLUSH_H
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#include <linux/mm.h>
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void flush_cache_all(void);
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void flush_icache_range(unsigned long start, unsigned long end);
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void flush_icache_page(struct vm_area_struct *vma, struct page *page);
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void flush_icache_range_vaddr(unsigned long paddr, unsigned long u_vaddr,
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int len);
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
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void flush_dcache_page(struct page *page);
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void dma_cache_wback_inv(unsigned long start, unsigned long sz);
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void dma_cache_inv(unsigned long start, unsigned long sz);
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void dma_cache_wback(unsigned long start, unsigned long sz);
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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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/* TBD: optimize this */
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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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/*
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* VM callbacks when entire/range of user-space V-P mappings are
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* torn-down/get-invalidated
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*
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* Currently we don't support D$ aliasing configs for our VIPT caches
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* NOPS for VIPT Cache with non-aliasing D$ configurations only
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*/
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#define flush_cache_dup_mm(mm) /* called on fork */
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#define flush_cache_mm(mm) /* called on munmap/exit */
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#define flush_cache_range(mm, u_vstart, u_vend)
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#define flush_cache_page(vma, u_vaddr, pfn) /* PF handling/COW-break */
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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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if (vma->vm_flags & VM_EXEC) \
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flush_icache_range_vaddr((unsigned long)(dst), 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
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