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Commit 4eec4b13 authored by Russell King's avatar Russell King
Browse files

ARM: pgtable: group pgd functions and data together 



Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent eb9b2b69

arch/arm/include/asm/pgtable.h

+23 −21
Original line number Diff line number Diff line
@@ -276,6 +276,29 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, 
extern struct page *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 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)



/*

 * 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.. */

#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;

}



extern pgd_t swapper_pg_dir[PTRS_PER_PGD];



/*

 * Encode and decode a swap entry.  Swap entries are stored in the Linux

 * page tables as follows: