inc/abi/cacheflush.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002
0003 #ifndef __ABI_CSKY_CACHEFLUSH_H
0004 #define __ABI_CSKY_CACHEFLUSH_H
0005
0006 /* Keep includes the same across arches.  */
0007 #include <linux/mm.h>
0008
0009 /*
0010  * The cache doesn't need to be flushed when TLB entries change when
0011  * the cache is mapped to physical memory, not virtual memory
0012  */
0013 #define flush_cache_all()           do { } while (0)
0014 #define flush_cache_mm(mm)          do { } while (0)
0015 #define flush_cache_dup_mm(mm)          do { } while (0)
0016 #define flush_cache_range(vma, start, end)  do { } while (0)
0017 #define flush_cache_page(vma, vmaddr, pfn)  do { } while (0)
0018
0019 #define PG_dcache_clean     PG_arch_1
0020
0021 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
0022 static inline void flush_dcache_page(struct page *page)
0023 {
0024     if (test_bit(PG_dcache_clean, &page->flags))
0025         clear_bit(PG_dcache_clean, &page->flags);
0026 }
0027
0028 #define flush_dcache_mmap_lock(mapping)     do { } while (0)
0029 #define flush_dcache_mmap_unlock(mapping)   do { } while (0)
0030 #define flush_icache_page(vma, page)        do { } while (0)
0031
0032 #define flush_icache_range(start, end)      cache_wbinv_range(start, end)
0033
0034 void flush_icache_mm_range(struct mm_struct *mm,
0035             unsigned long start, unsigned long end);
0036 void flush_icache_deferred(struct mm_struct *mm);
0037
0038 #define flush_cache_vmap(start, end)        do { } while (0)
0039 #define flush_cache_vunmap(start, end)      do { } while (0)
0040
0041 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
0042 do { \
0043     memcpy(dst, src, len); \
0044     if (vma->vm_flags & VM_EXEC) { \
0045         dcache_wb_range((unsigned long)dst, \
0046                 (unsigned long)dst + len); \
0047         flush_icache_mm_range(current->mm, \
0048                 (unsigned long)dst, \
0049                 (unsigned long)dst + len); \
0050         } \
0051 } while (0)
0052 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
0053     memcpy(dst, src, len)
0054
0055 #endif /* __ABI_CSKY_CACHEFLUSH_H */