arch/csky/abiv1/inc/abi/cacheflush.h

Source file repositories/reference/linux-study-clean/arch/csky/abiv1/inc/abi/cacheflush.h

File Facts

System
Linux kernel
Corpus path
arch/csky/abiv1/inc/abi/cacheflush.h
Extension
.h
Size
1980 bytes
Lines
65
Domain
Architecture Layer
Bucket
arch/csky
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef __ABI_CSKY_CACHEFLUSH_H
#define __ABI_CSKY_CACHEFLUSH_H

#include <linux/mm.h>
#include <asm/string.h>
#include <asm/cache.h>

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
extern void flush_dcache_page(struct page *);
void flush_dcache_folio(struct folio *);
#define flush_dcache_folio flush_dcache_folio

#define flush_cache_mm(mm)			dcache_wbinv_all()
#define flush_cache_page(vma, page, pfn)	cache_wbinv_all()
#define flush_cache_dup_mm(mm)			cache_wbinv_all()

#define flush_dcache_mmap_lock(mapping)		xa_lock_irq(&mapping->i_pages)
#define flush_dcache_mmap_unlock(mapping)	xa_unlock_irq(&mapping->i_pages)

#define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1
static inline void flush_kernel_vmap_range(void *addr, int size)
{
	dcache_wbinv_all();
}
static inline void invalidate_kernel_vmap_range(void *addr, int size)
{
	dcache_wbinv_all();
}

#define ARCH_HAS_FLUSH_ANON_PAGE
static inline void flush_anon_page(struct vm_area_struct *vma,
			 struct page *page, unsigned long vmaddr)
{
	if (PageAnon(page))
		cache_wbinv_all();
}

/*
 * if (current_mm != vma->mm) cache_wbinv_range(start, end) will be broken.
 * Use cache_wbinv_all() here and need to be improved in future.
 */
extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
#define flush_cache_vmap(start, end)		cache_wbinv_all()
#define flush_cache_vmap_early(start, end)	do { } while (0)
#define flush_cache_vunmap(start, end)		cache_wbinv_all()

#define flush_icache_range(start, end)		cache_wbinv_range(start, end)
#define flush_icache_mm_range(mm, start, end)	cache_wbinv_range(start, end)
#define flush_icache_deferred(mm)		do {} while (0);

#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
do { \
	memcpy(dst, src, len); \
} while (0)

#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
	memcpy(dst, src, len); \
	cache_wbinv_all(); \
} while (0)

#endif /* __ABI_CSKY_CACHEFLUSH_H */

Annotation

Implementation Notes