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highmem.h

#ifndef _ASM_HIGHMEM_H
#define _ASM_HIGHMEM_H

#include <asm/kmap_types.h>

#define PKMAP_BASE            (PAGE_OFFSET - PMD_SIZE)
#define LAST_PKMAP            PTRS_PER_PTE
#define LAST_PKMAP_MASK       (LAST_PKMAP - 1)
#define PKMAP_NR(virt)        (((virt) - PKMAP_BASE) >> PAGE_SHIFT)
#define PKMAP_ADDR(nr)        (PKMAP_BASE + ((nr) << PAGE_SHIFT))

#define kmap_prot       PAGE_KERNEL

#define flush_cache_kmaps()   flush_cache_all()

extern pte_t *pkmap_page_table;

#define ARCH_NEEDS_KMAP_HIGH_GET

extern void *kmap_high(struct page *page);
extern void *kmap_high_get(struct page *page);
extern void kunmap_high(struct page *page);

extern void *kmap(struct page *page);
extern void kunmap(struct page *page);
extern void *kmap_atomic(struct page *page, enum km_type type);
extern void kunmap_atomic(void *kvaddr, enum km_type type);
extern void *kmap_atomic_pfn(unsigned long pfn, enum km_type type);
extern struct page *kmap_atomic_to_page(const void *ptr);

#endif

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