1 #ifndef _BLACKFIN_PGTABLE_H
2 #define _BLACKFIN_PGTABLE_H
4 #include <asm-generic/4level-fixup.h>
7 #include <asm/mach-common/def_LPBlackfin.h>
9 typedef pte_t *pte_addr_t;
11 * Trivial page table functions.
13 #define pgd_present(pgd) (1)
14 #define pgd_none(pgd) (0)
15 #define pgd_bad(pgd) (0)
16 #define pgd_clear(pgdp)
17 #define kern_addr_valid(addr) (1)
19 #define pmd_offset(a, b) ((void *)0)
20 #define pmd_none(x) (!pmd_val(x))
21 #define pmd_present(x) (pmd_val(x))
22 #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
23 #define pmd_bad(x) (pmd_val(x) & ~PAGE_MASK)
25 #define kern_addr_valid(addr) (1)
27 #define PAGE_NONE __pgprot(0) /* these mean nothing to NO_MM */
28 #define PAGE_SHARED __pgprot(0) /* these mean nothing to NO_MM */
29 #define PAGE_COPY __pgprot(0) /* these mean nothing to NO_MM */
30 #define PAGE_READONLY __pgprot(0) /* these mean nothing to NO_MM */
31 #define PAGE_KERNEL __pgprot(0) /* these mean nothing to NO_MM */
33 extern void paging_init(void);
35 #define __swp_type(x) (0)
36 #define __swp_offset(x) (0)
37 #define __swp_entry(typ,off) ((swp_entry_t) { ((typ) | ((off) << 7)) })
38 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
39 #define __swp_entry_to_pte(x) ((pte_t) { (x).val })
41 static inline int pte_file(pte_t pte)
46 #define set_pte(pteptr, pteval) (*(pteptr) = pteval)
47 #define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
50 * Page assess control based on Blackfin CPLB management
52 #define _PAGE_RD (CPLB_USER_RD)
53 #define _PAGE_WR (CPLB_USER_WR)
54 #define _PAGE_USER (CPLB_USER_RD | CPLB_USER_WR)
55 #define _PAGE_ACCESSED CPLB_ALL_ACCESS
56 #define _PAGE_DIRTY (CPLB_DIRTY)
58 #define PTE_BIT_FUNC(fn, op) \
59 static inline pte_t pte_##fn(pte_t _pte) { _pte.pte op; return _pte; }
61 PTE_BIT_FUNC(rdprotect, &= ~_PAGE_RD);
62 PTE_BIT_FUNC(mkread, |= _PAGE_RD);
63 PTE_BIT_FUNC(wrprotect, &= ~_PAGE_WR);
64 PTE_BIT_FUNC(mkwrite, |= _PAGE_WR);
65 PTE_BIT_FUNC(exprotect, &= ~_PAGE_USER);
66 PTE_BIT_FUNC(mkexec, |= _PAGE_USER);
67 PTE_BIT_FUNC(mkclean, &= ~_PAGE_DIRTY);
68 PTE_BIT_FUNC(mkdirty, |= _PAGE_DIRTY);
69 PTE_BIT_FUNC(mkold, &= ~_PAGE_ACCESSED);
70 PTE_BIT_FUNC(mkyoung, |= _PAGE_ACCESSED);
73 * ZERO_PAGE is a global shared page that is always zero: used
74 * for zero-mapped memory areas etc..
76 #define ZERO_PAGE(vaddr) (virt_to_page(0))
78 extern unsigned int kobjsize(const void *objp);
80 #define swapper_pg_dir ((pgd_t *) 0)
82 * No page table caches to initialise.
84 #define pgtable_cache_init() do { } while (0)
85 #define io_remap_pfn_range remap_pfn_range
88 * All 32bit addresses are effectively valid for vmalloc...
89 * Sort of meaningless for non-VM targets.
91 #define VMALLOC_START 0
92 #define VMALLOC_END 0xffffffff
94 #include <asm-generic/pgtable.h>
96 #endif /* _BLACKFIN_PGTABLE_H */