/* * Based on arch/arm/include/asm/cacheflush.h * * Copyright (C) 1999-2002 Russell King. * Copyright (C) 2012 ARM Ltd. * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __ASM_CACHEFLUSH_H #define __ASM_CACHEFLUSH_H #include <linux/mm.h> /* * This flag is used to indicate that the page pointed to by a pte is clean * and does not require cleaning before returning it to the user. */ #define PG_dcache_clean PG_arch_1 /* * MM Cache Management * =================== * * The arch/arm64/mm/cache.S implements these methods. * * Start addresses are inclusive and end addresses are exclusive; start * addresses should be rounded down, end addresses up. * * See Documentation/cachetlb.txt for more information. Please note that * the implementation assumes non-aliasing VIPT D-cache and (aliasing) * VIPT I-cache. * * flush_cache_mm(mm) * * Clean and invalidate all user space cache entries * before a change of page tables. * * flush_icache_range(start, end) * * Ensure coherency between the I-cache and the D-cache in the * region described by start, end. * - start - virtual start address * - end - virtual end address * * __flush_cache_user_range(start, end) * * Ensure coherency between the I-cache and the D-cache in the * region described by start, end. * - start - virtual start address * - end - virtual end address * * __flush_dcache_area(kaddr, size) * * Ensure that the data held in page is written back. * - kaddr - page address * - size - region size */ extern void flush_icache_range(unsigned long start, unsigned long end); extern void __flush_dcache_area(void *addr, size_t len); extern void __inval_dcache_area(void *addr, size_t len); extern void __clean_dcache_area_poc(void *addr, size_t len); extern void __clean_dcache_area_pop(void *addr, size_t len); extern void __clean_dcache_area_pou(void *addr, size_t len); extern long __flush_cache_user_range(unsigned long start, unsigned long end); extern void sync_icache_aliases(void *kaddr, unsigned long len); static inline void flush_cache_mm(struct mm_struct *mm) { } static inline void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn) { } static inline void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { } /* * Cache maintenance functions used by the DMA API. No to be used directly. */ extern void __dma_map_area(const void *, size_t, int); extern void __dma_unmap_area(const void *, size_t, int); extern void __dma_flush_area(const void *, size_t); /* * Copy user data from/to a page which is mapped into a different * processes address space. Really, we want to allow our "user * space" model to handle this. */ extern void copy_to_user_page(struct vm_area_struct *, struct page *, unsigned long, void *, const void *, unsigned long); #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ do { \ memcpy(dst, src, len); \ } while (0) #define flush_cache_dup_mm(mm) flush_cache_mm(mm) /* * flush_dcache_page is used when the kernel has written to the page * cache page at virtual address page->virtual. * * If this page isn't mapped (ie, page_mapping == NULL), or it might * have userspace mappings, then we _must_ always clean + invalidate * the dcache entries associated with the kernel mapping. * * Otherwise we can defer the operation, and clean the cache when we are * about to change to user space. This is the same method as used on SPARC64. * See update_mmu_cache for the user space part. */ #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 extern void flush_dcache_page(struct page *); static inline void __flush_icache_all(void) { asm("ic ialluis"); dsb(ish); } #define flush_dcache_mmap_lock(mapping) \ spin_lock_irq(&(mapping)->tree_lock) #define flush_dcache_mmap_unlock(mapping) \ spin_unlock_irq(&(mapping)->tree_lock) /* * We don't appear to need to do anything here. In fact, if we did, we'd * duplicate cache flushing elsewhere performed by flush_dcache_page(). */ #define flush_icache_page(vma,page) do { } while (0) /* * Not required on AArch64 (PIPT or VIPT non-aliasing D-cache). */ static inline void flush_cache_vmap(unsigned long start, unsigned long end) { } static inline void flush_cache_vunmap(unsigned long start, unsigned long end) { } int set_memory_valid(unsigned long addr, int numpages, int enable); #endif
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acenv.h | File | 541 B | 0644 |
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acpi.h | File | 4.34 KB | 0644 |
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asm-bug.h | File | 1.45 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-uaccess.h | File | 2.09 KB | 0644 |
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assembler.h | File | 13.51 KB | 0644 |
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atomic.h | File | 8.35 KB | 0644 |
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boot.h | File | 384 B | 0644 |
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bug.h | File | 1.09 KB | 0644 |
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cache.h | File | 2.23 KB | 0644 |
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cacheflush.h | File | 4.87 KB | 0644 |
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checksum.h | File | 1.35 KB | 0644 |
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clocksource.h | File | 192 B | 0644 |
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cpu.h | File | 1.84 KB | 0644 |
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current.h | File | 517 B | 0644 |
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hardirq.h | File | 2.08 KB | 0644 |
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irqflags.h | File | 2.3 KB | 0644 |
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jump_label.h | File | 1.68 KB | 0644 |
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kernel-pgtable.h | File | 4.03 KB | 0644 |
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lse.h | File | 1.26 KB | 0644 |
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memblock.h | File | 720 B | 0644 |
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memory.h | File | 9.16 KB | 0644 |
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mmu.h | File | 2.76 KB | 0644 |
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mmu_context.h | File | 6.35 KB | 0644 |
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module.h | File | 2.8 KB | 0644 |
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page.h | File | 1.61 KB | 0644 |
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pgalloc.h | File | 3.71 KB | 0644 |
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spinlock.h | File | 3.33 KB | 0644 |
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stacktrace.h | File | 2.53 KB | 0644 |
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stat.h | File | 1.43 KB | 0644 |
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string.h | File | 2.33 KB | 0644 |
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suspend.h | File | 1.65 KB | 0644 |
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sync_bitops.h | File | 1.11 KB | 0644 |
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syscall.h | File | 2.87 KB | 0644 |
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sysreg.h | File | 25.1 KB | 0644 |
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system_misc.h | File | 1.86 KB | 0644 |
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thread_info.h | File | 3.93 KB | 0644 |
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timex.h | File | 883 B | 0644 |
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tlb.h | File | 2.22 KB | 0644 |
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tlbflush.h | File | 5.38 KB | 0644 |
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topology.h | File | 1.29 KB | 0644 |
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traps.h | File | 3.33 KB | 0644 |
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uaccess.h | File | 12.01 KB | 0644 |
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unistd.h | File | 1.6 KB | 0644 |
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unistd32.h | File | 27.53 KB | 0644 |
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uprobes.h | File | 777 B | 0644 |
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vdso.h | File | 1.09 KB | 0644 |
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vdso_datapage.h | File | 1.53 KB | 0644 |
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vectors.h | File | 1.75 KB | 0644 |
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virt.h | File | 3 KB | 0644 |
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word-at-a-time.h | File | 2.22 KB | 0644 |
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