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 #define set_pte(pteptr, pteval) (*(pteptr) = pteval)
16 #define set_pte_at(_mm,addr,ptep,pteval) do { \
17 if (((_mm) != current->mm && (_mm) != &init_mm) || \
18 HYPERVISOR_update_va_mapping((addr), (pteval), 0)) \
19 set_pte((ptep), (pteval)); \
22 #define set_pmd(pmdptr, pmdval) xen_l2_entry_update((pmdptr), (pmdval))
24 #define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval)
26 #define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
27 #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
29 #define raw_ptep_get_and_clear(xp, pte) __pte_ma(xchg(&(xp)->pte_low, 0))
31 #define __HAVE_ARCH_PTEP_CLEAR_FLUSH
32 #define ptep_clear_flush(vma, addr, ptep) \
34 pte_t *__ptep = (ptep); \
35 pte_t __res = *__ptep; \
36 if (!pte_none(__res) && \
37 ((vma)->vm_mm != current->mm || \
38 HYPERVISOR_update_va_mapping(addr, __pte(0), \
39 (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \
40 UVMF_INVLPG|UVMF_MULTI))) { \
41 __ptep->pte_low = 0; \
42 flush_tlb_page(vma, addr); \
47 #define __pte_mfn(_pte) ((_pte).pte_low >> PAGE_SHIFT)
48 #define pte_mfn(_pte) ((_pte).pte_low & _PAGE_PRESENT ? \
49 __pte_mfn(_pte) : pfn_to_mfn(__pte_mfn(_pte)))
50 #define pte_pfn(_pte) ((_pte).pte_low & _PAGE_PRESENT ? \
51 mfn_to_local_pfn(__pte_mfn(_pte)) : __pte_mfn(_pte))
53 #define pte_page(_pte) pfn_to_page(pte_pfn(_pte))
54 #define pte_none(x) (!(x).pte_low)
56 #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
57 #define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
60 * All present user pages are user-executable:
62 static inline int pte_exec(pte_t pte)
68 * All present pages are kernel-executable:
70 static inline int pte_exec_kernel(pte_t pte)
76 * Bits 0, 6 and 7 are taken, split up the 29 bits of offset
79 #define PTE_FILE_MAX_BITS 29
81 #define pte_to_pgoff(pte) \
82 ((((pte).pte_low >> 1) & 0x1f ) + (((pte).pte_low >> 8) << 5 ))
84 #define pgoff_to_pte(off) \
85 ((pte_t) { (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE })
87 /* Encode and de-code a swap entry */
88 #define __swp_type(x) (((x).val >> 1) & 0x1f)
89 #define __swp_offset(x) ((x).val >> 8)
90 #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
91 #define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low })
92 #define __swp_entry_to_pte(x) ((pte_t) { (x).val })
94 void vmalloc_sync_all(void);
96 #endif /* _I386_PGTABLE_2LEVEL_H */