1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
4 #include <linux/kernel.h>
7 #include <linux/syscalls.h>
8 #include <linux/spinlock.h>
10 #include <asm/cache.h>
11 #include <asm/cacheflush.h>
12 #include <asm/cachectl.h>
14 #define PG_dcache_clean PG_arch_1
16 void flush_dcache_page(struct page *page)
18 struct address_space *mapping;
20 if (page == ZERO_PAGE(0))
23 mapping = page_mapping_file(page);
25 if (mapping && !page_mapcount(page))
26 clear_bit(PG_dcache_clean, &page->flags);
31 set_bit(PG_dcache_clean, &page->flags);
34 EXPORT_SYMBOL(flush_dcache_page);
36 void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
39 unsigned long pfn = pte_pfn(*ptep);
45 page = pfn_to_page(pfn);
46 if (page == ZERO_PAGE(0))
49 if (!test_and_set_bit(PG_dcache_clean, &page->flags))
52 if (page_mapping_file(page)) {
53 if (vma->vm_flags & VM_EXEC)
58 void flush_kernel_dcache_page(struct page *page)
60 struct address_space *mapping;
62 mapping = page_mapping_file(page);
64 if (!mapping || mapping_mapped(mapping))
67 EXPORT_SYMBOL(flush_kernel_dcache_page);
69 void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
74 if (vma->vm_flags & VM_EXEC)