arch/x86/xen/mmu.h

   1 #ifndef _XEN_MMU_H
   2
   3 #include <linux/linkage.h>
   4 #include <asm/page.h>
   5
   6 enum pt_level {
   7         PT_PGD,
   8         PT_PUD,
   9         PT_PMD,
  10         PT_PTE
  11 };
  12
  13 /*
  14  * Page-directory addresses above 4GB do not fit into architectural %cr3.
  15  * When accessing %cr3, or equivalent field in vcpu_guest_context, guests
  16  * must use the following accessor macros to pack/unpack valid MFNs.
  17  *
  18  * Note that Xen is using the fact that the pagetable base is always
  19  * page-aligned, and putting the 12 MSB of the address into the 12 LSB
  20  * of cr3.
  21  */
  22 #define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20))
  23 #define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20))
  24
  25
  26 void set_pte_mfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags);
  27
  28 void xen_set_pte(pte_t *ptep, pte_t pteval);
  29 void xen_set_pte_at(struct mm_struct *mm, unsigned long addr,
  30                     pte_t *ptep, pte_t pteval);
  31 void xen_set_pmd(pmd_t *pmdp, pmd_t pmdval);
  32
  33 void xen_activate_mm(struct mm_struct *prev, struct mm_struct *next);
  34 void xen_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
  35 void xen_exit_mmap(struct mm_struct *mm);
  36
  37 void xen_pgd_pin(pgd_t *pgd);
  38 //void xen_pgd_unpin(pgd_t *pgd);
  39
  40 #ifdef CONFIG_X86_PAE
  41 unsigned long long xen_pte_val(pte_t);
  42 unsigned long long xen_pmd_val(pmd_t);
  43 unsigned long long xen_pgd_val(pgd_t);
  44
  45 pte_t xen_make_pte(unsigned long long);
  46 pmd_t xen_make_pmd(unsigned long long);
  47 pgd_t xen_make_pgd(unsigned long long);
  48
  49 void xen_set_pte_at(struct mm_struct *mm, unsigned long addr,
  50                     pte_t *ptep, pte_t pteval);
  51 void xen_set_pte_atomic(pte_t *ptep, pte_t pte);
  52 void xen_set_pud(pud_t *ptr, pud_t val);
  53 void xen_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
  54 void xen_pmd_clear(pmd_t *pmdp);
  55
  56
  57 #else
  58 unsigned long xen_pte_val(pte_t);
  59 unsigned long xen_pmd_val(pmd_t);
  60 unsigned long xen_pgd_val(pgd_t);
  61
  62 pte_t xen_make_pte(unsigned long);
  63 pmd_t xen_make_pmd(unsigned long);
  64 pgd_t xen_make_pgd(unsigned long);
  65 #endif
  66
  67 #endif  /* _XEN_MMU_H */