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