mmu.h

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#ifndef _XEN_MMU_H

#include <linux/linkage.h>
#include <asm/page.h>

enum pt_level {
    PT_PGD,
    PT_PUD,
    PT_PMD,
    PT_PTE
};


bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);

void set_pte_mfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags);

pte_t xen_ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
void  xen_ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
                  pte_t *ptep, pte_t pte);

unsigned long xen_read_cr2_direct(void);

extern void xen_init_mmu_ops(void);
extern void xen_hvm_init_mmu_ops(void);
#endif  /* _XEN_MMU_H */