cacheflush.h

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef __ABI_CSKY_CACHEFLUSH_H
#define __ABI_CSKY_CACHEFLUSH_H

/* Keep includes the same across arches.  */
#include <linux/mm.h>

/*
 * The cache doesn't need to be flushed when TLB entries change when
 * the cache is mapped to physical memory, not virtual memory
 */
#define flush_cache_all()			do { } while (0)
#define flush_cache_mm(mm)			do { } while (0)
#define flush_cache_dup_mm(mm)			do { } while (0)
#define flush_cache_range(vma, start, end)	do { } while (0)
#define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)

#define PG_dcache_clean		PG_arch_1

static inline void flush_dcache_folio(struct folio *folio)
{
	if (test_bit(PG_dcache_clean, &folio->flags))
		clear_bit(PG_dcache_clean, &folio->flags);
}
#define flush_dcache_folio flush_dcache_folio

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
static inline void flush_dcache_page(struct page *page)
{
	flush_dcache_folio(page_folio(page));
}

#define flush_dcache_mmap_lock(mapping)		do { } while (0)
#define flush_dcache_mmap_unlock(mapping)	do { } while (0)

#define flush_icache_range(start, end)		cache_wbinv_range(start, end)

void flush_icache_mm_range(struct mm_struct *mm,
			unsigned long start, unsigned long end);
void flush_icache_deferred(struct mm_struct *mm);

#define flush_cache_vmap(start, end)		do { } while (0)
#define flush_cache_vmap_early(start, end)	do { } while (0)
#define flush_cache_vunmap(start, end)		do { } while (0)

#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
	memcpy(dst, src, len); \
	if (vma->vm_flags & VM_EXEC) { \
		dcache_wb_range((unsigned long)dst, \
				(unsigned long)dst + len); \
		flush_icache_mm_range(current->mm, \
				(unsigned long)dst, \
				(unsigned long)dst + len); \
		} \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
	memcpy(dst, src, len)

#endif /* __ABI_CSKY_CACHEFLUSH_H */