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76 lines
1.5 KiB
76 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. |
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#include <linux/kernel.h> |
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#include <linux/mm.h> |
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#include <linux/fs.h> |
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#include <linux/syscalls.h> |
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#include <linux/spinlock.h> |
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#include <asm/page.h> |
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#include <asm/cache.h> |
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#include <asm/cacheflush.h> |
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#include <asm/cachectl.h> |
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#define PG_dcache_clean PG_arch_1 |
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void flush_dcache_page(struct page *page) |
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{ |
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struct address_space *mapping; |
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if (page == ZERO_PAGE(0)) |
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return; |
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mapping = page_mapping_file(page); |
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if (mapping && !page_mapcount(page)) |
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clear_bit(PG_dcache_clean, &page->flags); |
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else { |
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dcache_wbinv_all(); |
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if (mapping) |
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icache_inv_all(); |
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set_bit(PG_dcache_clean, &page->flags); |
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} |
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} |
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EXPORT_SYMBOL(flush_dcache_page); |
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void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, |
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pte_t *ptep) |
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{ |
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unsigned long pfn = pte_pfn(*ptep); |
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struct page *page; |
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if (!pfn_valid(pfn)) |
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return; |
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page = pfn_to_page(pfn); |
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if (page == ZERO_PAGE(0)) |
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return; |
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if (!test_and_set_bit(PG_dcache_clean, &page->flags)) |
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dcache_wbinv_all(); |
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if (page_mapping_file(page)) { |
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if (vma->vm_flags & VM_EXEC) |
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icache_inv_all(); |
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} |
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} |
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void flush_kernel_dcache_page(struct page *page) |
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{ |
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struct address_space *mapping; |
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mapping = page_mapping_file(page); |
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if (!mapping || mapping_mapped(mapping)) |
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dcache_wbinv_all(); |
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} |
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EXPORT_SYMBOL(flush_kernel_dcache_page); |
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void flush_cache_range(struct vm_area_struct *vma, unsigned long start, |
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unsigned long end) |
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{ |
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dcache_wbinv_all(); |
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if (vma->vm_flags & VM_EXEC) |
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icache_inv_all(); |
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}
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