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