/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_CACHEFLUSH_H
#define _ASM_GENERIC_CACHEFLUSH_H

#include <linux/instrumented.h>

struct mm_struct;
struct vm_area_struct;
struct page;
struct address_space;

/*
 * The cache doesn't need to be flushed when TLB entries change when
 * the cache is mapped to physical memory, not virtual memory
 */
#ifndef flush_cache_all
static inline void flush_cache_all(void)
{
}
#endif

#ifndef flush_cache_mm
static inline void flush_cache_mm(struct mm_struct *mm)
{
}
#endif

#ifndef flush_cache_dup_mm
static inline void flush_cache_dup_mm(struct mm_struct *mm)
{
}
#endif

#ifndef flush_cache_range
static inline void flush_cache_range(struct vm_area_struct *vma,
                                     unsigned long start,
                                     unsigned long end)
{
}
#endif

#ifndef flush_cache_page
static inline void flush_cache_page(struct vm_area_struct *vma,
                                    unsigned long vmaddr,
                                    unsigned long pfn)
{
}
#endif

#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
static inline void flush_dcache_page(struct page *page)
{
}

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
#endif

#ifndef flush_dcache_mmap_lock
static inline void flush_dcache_mmap_lock(struct address_space *mapping)
{
}
#endif

#ifndef flush_dcache_mmap_unlock
static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
{
}
#endif

#ifndef flush_icache_range
static inline void flush_icache_range(unsigned long start, unsigned long end)
{
}
#endif

#ifndef flush_icache_user_range
#define flush_icache_user_range flush_icache_range
#endif

#ifndef flush_icache_user_page
static inline void flush_icache_user_page(struct vm_area_struct *vma,
                                           struct page *page,
                                           unsigned long addr, int len)
{
}
#endif

#ifndef flush_cache_vmap
static inline void flush_cache_vmap(unsigned long start, unsigned long end)
{
}
#endif

#ifndef flush_cache_vmap_early
static inline void flush_cache_vmap_early(unsigned long start, unsigned long end)
{
}
#endif

#ifndef flush_cache_vunmap
static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
{
}
#endif

#ifndef copy_to_user_page
#define copy_to_user_page(vma, page, vaddr, dst, src, len)      \
        do { \
                instrument_copy_to_user((void __user *)dst, src, len); \
                memcpy(dst, src, len); \
                flush_icache_user_page(vma, page, vaddr, len); \
        } while (0)
#endif


#ifndef copy_from_user_page
#define copy_from_user_page(vma, page, vaddr, dst, src, len)              \
        do {                                                              \
                instrument_copy_from_user_before(dst, (void __user *)src, \
                                                 len);                    \
                memcpy(dst, src, len);                                    \
                instrument_copy_from_user_after(dst, (void __user *)src, len, \
                                                0);                       \
        } while (0)
#endif

#endif /* _ASM_GENERIC_CACHEFLUSH_H */