1 #ifndef _I386_PGTABLE_2LEVEL_H
2 #define _I386_PGTABLE_2LEVEL_H
5 printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low)
7 printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
10 * Certain architectures need to do special things when PTEs
11 * within a page table are directly modified. Thus, the following
12 * hook is made available.
14 #ifndef CONFIG_PARAVIRT
15 #define set_pte(pteptr, pteval) (*(pteptr) = pteval)
17 #define set_pte_at(_mm,addr,ptep,pteval) do { \
18 if (((_mm) != current->mm && (_mm) != &init_mm) || \
19 HYPERVISOR_update_va_mapping((addr), (pteval), 0)) \
20 set_pte((ptep), (pteval)); \
22 #define set_pmd(pmdptr, pmdval) xen_l2_entry_update((pmdptr), (pmdval))
25 #define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval)
26 #define set_pte_present(mm,addr,ptep,pteval) set_pte_at(mm,addr,ptep,pteval)
28 #define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
29 #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
31 #define raw_ptep_get_and_clear(xp) __pte_ma(xchg(&(xp)->pte_low, 0))
33 #define pte_mfn(_pte) ((_pte).pte_low >> PAGE_SHIFT)
34 #define pte_page(x) pfn_to_page(pte_pfn(x))
35 #define pte_none(x) (!(x).pte_low)
36 #define pte_pfn(x) mfn_to_local_pfn(pte_mfn(x))
37 #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
38 #define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
41 * All present user pages are user-executable:
43 static inline int pte_exec(pte_t pte)
49 * All present pages are kernel-executable:
51 static inline int pte_exec_kernel(pte_t pte)
57 * Bits 0, 6 and 7 are taken, split up the 29 bits of offset
60 #define PTE_FILE_MAX_BITS 29
62 #define pte_to_pgoff(pte) \
63 ((((pte).pte_low >> 1) & 0x1f ) + (((pte).pte_low >> 8) << 5 ))
65 #define pgoff_to_pte(off) \
66 ((pte_t) { (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE })
68 /* Encode and de-code a swap entry */
69 #define __swp_type(x) (((x).val >> 1) & 0x1f)
70 #define __swp_offset(x) ((x).val >> 8)
71 #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
72 #define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low })
73 #define __swp_entry_to_pte(x) ((pte_t) { (x).val })
75 void vmalloc_sync_all(void);
77 #endif /* _I386_PGTABLE_2LEVEL_H */