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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#ifndef _BLACKFIN_PGTABLE_H
2#define _BLACKFIN_PGTABLE_H
3
4#include <asm-generic/4level-fixup.h>
5
6#include <asm/page.h>
7#include <asm/def_LPBlackfin.h>
8
9typedef pte_t *pte_addr_t;
10/*
11* Trivial page table functions.
12*/
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)
18
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)
24
25#define kern_addr_valid(addr) (1)
26
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 */
32#define pgprot_noncached(prot) (prot)
33
34extern void paging_init(void);
35
36#define __swp_type(x) (0)
37#define __swp_offset(x) (0)
38#define __swp_entry(typ,off) ((swp_entry_t) { ((typ) | ((off) << 7)) })
39#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
40#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
41
42static inline int pte_file(pte_t pte)
43{
44 return 0;
45}
46
47#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
48#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
49
50/*
51 * Page assess control based on Blackfin CPLB management
52 */
53#define _PAGE_RD (CPLB_USER_RD)
54#define _PAGE_WR (CPLB_USER_WR)
55#define _PAGE_USER (CPLB_USER_RD | CPLB_USER_WR)
56#define _PAGE_ACCESSED CPLB_ALL_ACCESS
57#define _PAGE_DIRTY (CPLB_DIRTY)
58
59#define PTE_BIT_FUNC(fn, op) \
60 static inline pte_t pte_##fn(pte_t _pte) { _pte.pte op; return _pte; }
61
62PTE_BIT_FUNC(rdprotect, &= ~_PAGE_RD);
63PTE_BIT_FUNC(mkread, |= _PAGE_RD);
64PTE_BIT_FUNC(wrprotect, &= ~_PAGE_WR);
65PTE_BIT_FUNC(mkwrite, |= _PAGE_WR);
66PTE_BIT_FUNC(exprotect, &= ~_PAGE_USER);
67PTE_BIT_FUNC(mkexec, |= _PAGE_USER);
68PTE_BIT_FUNC(mkclean, &= ~_PAGE_DIRTY);
69PTE_BIT_FUNC(mkdirty, |= _PAGE_DIRTY);
70PTE_BIT_FUNC(mkold, &= ~_PAGE_ACCESSED);
71PTE_BIT_FUNC(mkyoung, |= _PAGE_ACCESSED);
72
73/*
74 * ZERO_PAGE is a global shared page that is always zero: used
75 * for zero-mapped memory areas etc..
76 */
77#define ZERO_PAGE(vaddr) (virt_to_page(0))
78
79extern unsigned int kobjsize(const void *objp);
80
81#define swapper_pg_dir ((pgd_t *) 0)
82/*
83 * No page table caches to initialise.
84 */
85#define pgtable_cache_init() do { } while (0)
86#define io_remap_pfn_range remap_pfn_range
87
88/*
89 * All 32bit addresses are effectively valid for vmalloc...
90 * Sort of meaningless for non-VM targets.
91 */
92#define VMALLOC_START 0
93#define VMALLOC_END 0xffffffff
94
95#include <asm-generic/pgtable.h>
96
97#endif /* _BLACKFIN_PGTABLE_H */