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ARM: pgtable: group pgd functions and data together

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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2010-11-26 20:12:12 +00:00
parent eb9b2b69d3
commit 4eec4b1396
1 changed files with 23 additions and 21 deletions
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44
arch/arm/include/asm/pgtable.h
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@@ -276,6 +276,29 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
extern struct page *empty_zero_page; extern struct page *empty_zero_page;
#define ZERO_PAGE(vaddr) (empty_zero_page) #define ZERO_PAGE(vaddr) (empty_zero_page)
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
/* to find an entry in a page-table-directory */
#define pgd_index(addr) ((addr) >> PGDIR_SHIFT)
#define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr))
/* to find an entry in a kernel page-table-directory */
#define pgd_offset_k(addr) pgd_offset(&init_mm, addr)
/*
* The "pgd_xxx()" functions here are trivial for a folded two-level
* setup: the pgd is never bad, and a pmd always exists (as it's folded
* into the pgd entry)
*/
#define pgd_none(pgd) (0)
#define pgd_bad(pgd) (0)
#define pgd_present(pgd) (1)
#define pgd_clear(pgdp) do { } while (0)
#define set_pgd(pgd,pgdp) do { } while (0)
#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) #define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
#define pfn_pte(pfn,prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))) #define pfn_pte(pfn,prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
@@ -382,25 +405,6 @@ static inline pte_t *pmd_page_vaddr(pmd_t pmd)
*/ */
#define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot) #define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot)
/*
* The "pgd_xxx()" functions here are trivial for a folded two-level
* setup: the pgd is never bad, and a pmd always exists (as it's folded
* into the pgd entry)
*/
#define pgd_none(pgd) (0)
#define pgd_bad(pgd) (0)
#define pgd_present(pgd) (1)
#define pgd_clear(pgdp) do { } while (0)
#define set_pgd(pgd,pgdp) do { } while (0)
/* to find an entry in a page-table-directory */
#define pgd_index(addr) ((addr) >> PGDIR_SHIFT)
#define pgd_offset(mm, addr) ((mm)->pgd+pgd_index(addr))
/* to find an entry in a kernel page-table-directory */
#define pgd_offset_k(addr) pgd_offset(&init_mm, addr)
/* Find an entry in the second-level page table.. */ /* Find an entry in the second-level page table.. */
#define pmd_offset(dir, addr) ((pmd_t *)(dir)) #define pmd_offset(dir, addr) ((pmd_t *)(dir))
@@ -414,8 +418,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
return pte; return pte;
} }
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
/* /*
* Encode and decode a swap entry. Swap entries are stored in the Linux * Encode and decode a swap entry. Swap entries are stored in the Linux
* page tables as follows: * page tables as follows: