| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. |
| 3 | |
| 4 | #include <linux/kernel.h> |
| 5 | #include <linux/mm.h> |
| 6 | #include <linux/fs.h> |
| 7 | #include <linux/syscalls.h> |
| 8 | #include <linux/spinlock.h> |
| 9 | #include <asm/page.h> |
| 10 | #include <asm/cache.h> |
| 11 | #include <asm/cacheflush.h> |
| 12 | #include <asm/cachectl.h> |
| 13 | |
| 14 | void flush_dcache_page(struct page *page) |
| 15 | { |
| 16 | struct address_space *mapping = page_mapping(page); |
| 17 | unsigned long addr; |
| 18 | |
| 19 | if (mapping && !mapping_mapped(mapping)) { |
| 20 | set_bit(PG_arch_1, &(page)->flags); |
| 21 | return; |
| 22 | } |
| 23 | |
| 24 | /* |
| 25 | * We could delay the flush for the !page_mapping case too. But that |
| 26 | * case is for exec env/arg pages and those are %99 certainly going to |
| 27 | * get faulted into the tlb (and thus flushed) anyways. |
| 28 | */ |
| 29 | addr = (unsigned long) page_address(page); |
| 30 | dcache_wb_range(addr, addr + PAGE_SIZE); |
| 31 | } |
| 32 | |
| 33 | void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, |
| 34 | pte_t *pte) |
| 35 | { |
| 36 | unsigned long addr; |
| 37 | struct page *page; |
| 38 | unsigned long pfn; |
| 39 | |
| 40 | pfn = pte_pfn(*pte); |
| 41 | if (unlikely(!pfn_valid(pfn))) |
| 42 | return; |
| 43 | |
| 44 | page = pfn_to_page(pfn); |
| 45 | addr = (unsigned long) page_address(page); |
| 46 | |
| 47 | if (vma->vm_flags & VM_EXEC || |
| 48 | pages_do_alias(addr, address & PAGE_MASK)) |
| 49 | cache_wbinv_all(); |
| 50 | |
| 51 | clear_bit(PG_arch_1, &(page)->flags); |
| 52 | } |