/* * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs * -flush_cache_dup_mm (fork) * -likewise for flush_cache_mm (exit/execve) * -likewise for flush_cache_{range,page} (munmap, exit, COW-break) * * vineetg: April 2008 * -Added a critical CacheLine flush to copy_to_user_page( ) which * was causing gdbserver to not setup breakpoints consistently */ #ifndef _ASM_CACHEFLUSH_H #define _ASM_CACHEFLUSH_H #include <linux/mm.h> #include <asm/shmparam.h> /* * Semantically we need this because icache doesn't snoop dcache/dma. * However ARC Cache flush requires paddr as well as vaddr, latter not available * in the flush_icache_page() API. So we no-op it but do the equivalent work * in update_mmu_cache() */ #define flush_icache_page(vma, page) void flush_cache_all(void); void flush_icache_range(unsigned long kstart, unsigned long kend); void __sync_icache_dcache(phys_addr_t paddr, unsigned long vaddr, int len); void __inv_icache_page(phys_addr_t paddr, unsigned long vaddr); void __flush_dcache_page(phys_addr_t paddr, unsigned long vaddr); #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 void flush_dcache_page(struct page *page); void dma_cache_wback_inv(phys_addr_t start, unsigned long sz); void dma_cache_inv(phys_addr_t start, unsigned long sz); void dma_cache_wback(phys_addr_t start, unsigned long sz); #define flush_dcache_mmap_lock(mapping) do { } while (0) #define flush_dcache_mmap_unlock(mapping) do { } while (0) /* TBD: optimize this */ #define flush_cache_vmap(start, end) flush_cache_all() #define flush_cache_vunmap(start, end) flush_cache_all() #define flush_cache_dup_mm(mm) /* called on fork (VIVT only) */ #ifndef CONFIG_ARC_CACHE_VIPT_ALIASING #define flush_cache_mm(mm) /* called on munmap/exit */ #define flush_cache_range(mm, u_vstart, u_vend) #define flush_cache_page(vma, u_vaddr, pfn) /* PF handling/COW-break */ #else /* VIPT aliasing dcache */ /* To clear out stale userspace mappings */ void flush_cache_mm(struct mm_struct *mm); void flush_cache_range(struct vm_area_struct *vma, unsigned long start,unsigned long end); void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long page); /* * To make sure that userspace mapping is flushed to memory before * get_user_pages() uses a kernel mapping to access the page */ #define ARCH_HAS_FLUSH_ANON_PAGE void flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long u_vaddr); #endif /* CONFIG_ARC_CACHE_VIPT_ALIASING */ /* * A new pagecache page has PG_arch_1 clear - thus dcache dirty by default * This works around some PIO based drivers which don't call flush_dcache_page * to record that they dirtied the dcache */ #define PG_dc_clean PG_arch_1 #define CACHE_COLORS_NUM 4 #define CACHE_COLORS_MSK (CACHE_COLORS_NUM - 1) #define CACHE_COLOR(addr) (((unsigned long)(addr) >> (PAGE_SHIFT)) & CACHE_COLORS_MSK) /* * Simple wrapper over config option * Bootup code ensures that hardware matches kernel configuration */ static inline int cache_is_vipt_aliasing(void) { return IS_ENABLED(CONFIG_ARC_CACHE_VIPT_ALIASING); } /* * checks if two addresses (after page aligning) index into same cache set */ #define addr_not_cache_congruent(addr1, addr2) \ ({ \ cache_is_vipt_aliasing() ? \ (CACHE_COLOR(addr1) != CACHE_COLOR(addr2)) : 0; \ }) #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ do { \ memcpy(dst, src, len); \ if (vma->vm_flags & VM_EXEC) \ __sync_icache_dcache((unsigned long)(dst), vaddr, len); \ } while (0) #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ memcpy(dst, src, len); \ #endif
Name | Type | Size | Permission | Actions |
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Kbuild | File | 681 B | 0644 |
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arcregs.h | File | 8.59 KB | 0644 |
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asm-offsets.h | File | 311 B | 0644 |
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atomic.h | File | 15.14 KB | 0644 |
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barrier.h | File | 1.75 KB | 0644 |
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bitops.h | File | 9.81 KB | 0644 |
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bug.h | File | 938 B | 0644 |
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cache.h | File | 3.77 KB | 0644 |
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cacheflush.h | File | 3.88 KB | 0644 |
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checksum.h | File | 2.45 KB | 0644 |
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cmpxchg.h | File | 5.4 KB | 0644 |
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current.h | File | 695 B | 0644 |
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delay.h | File | 1.99 KB | 0644 |
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disasm.h | File | 3.87 KB | 0644 |
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dma-mapping.h | File | 734 B | 0644 |
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dma.h | File | 459 B | 0644 |
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dwarf.h | File | 892 B | 0644 |
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elf.h | File | 2.15 KB | 0644 |
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entry-arcv2.h | File | 4.85 KB | 0644 |
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entry-compact.h | File | 9.29 KB | 0644 |
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entry.h | File | 6.73 KB | 0644 |
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exec.h | File | 410 B | 0644 |
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fb.h | File | 411 B | 0644 |
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futex.h | File | 3.67 KB | 0644 |
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highmem.h | File | 1.46 KB | 0644 |
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hugepage.h | File | 2.41 KB | 0644 |
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io.h | File | 6.43 KB | 0644 |
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irq.h | File | 825 B | 0644 |
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irqflags-arcv2.h | File | 3.45 KB | 0644 |
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irqflags-compact.h | File | 4.25 KB | 0644 |
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irqflags.h | File | 509 B | 0644 |
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kdebug.h | File | 400 B | 0644 |
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kgdb.h | File | 1.35 KB | 0644 |
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kmap_types.h | File | 489 B | 0644 |
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kprobes.h | File | 1.37 KB | 0644 |
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linkage.h | File | 1.42 KB | 0644 |
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mach_desc.h | File | 2.06 KB | 0644 |
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mmu.h | File | 2.44 KB | 0644 |
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mmu_context.h | File | 5.67 KB | 0644 |
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mmzone.h | File | 989 B | 0644 |
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module.h | File | 661 B | 0644 |
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page.h | File | 2.99 KB | 0644 |
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pci.h | File | 705 B | 0644 |
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perf_event.h | File | 6.86 KB | 0644 |
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pgalloc.h | File | 3.79 KB | 0644 |
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pgtable.h | File | 14.2 KB | 0644 |
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processor.h | File | 4.69 KB | 0644 |
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ptrace.h | File | 3.87 KB | 0644 |
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sections.h | File | 407 B | 0644 |
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segment.h | File | 612 B | 0644 |
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serial.h | File | 644 B | 0644 |
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setup.h | File | 1.18 KB | 0644 |
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shmparam.h | File | 442 B | 0644 |
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smp.h | File | 4.25 KB | 0644 |
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spinlock.h | File | 8.79 KB | 0644 |
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spinlock_types.h | File | 1.03 KB | 0644 |
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stacktrace.h | File | 1.29 KB | 0644 |
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string.h | File | 1.15 KB | 0644 |
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switch_to.h | File | 1.17 KB | 0644 |
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syscall.h | File | 1.57 KB | 0644 |
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syscalls.h | File | 653 B | 0644 |
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thread_info.h | File | 3.39 KB | 0644 |
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timex.h | File | 508 B | 0644 |
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tlb-mmu1.h | File | 3.48 KB | 0644 |
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tlb.h | File | 1.23 KB | 0644 |
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tlbflush.h | File | 1.76 KB | 0644 |
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uaccess.h | File | 18.45 KB | 0644 |
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unaligned.h | File | 771 B | 0644 |
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unwind.h | File | 3.51 KB | 0644 |
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