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Linux/arch/avr32/include/asm/pgtable-2level.h

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  1 /*
  2  * Copyright (C) 2004-2006 Atmel Corporation
  3  *
  4  * This program is free software; you can redistribute it and/or modify
  5  * it under the terms of the GNU General Public License version 2 as
  6  * published by the Free Software Foundation.
  7  */
  8 #ifndef __ASM_AVR32_PGTABLE_2LEVEL_H
  9 #define __ASM_AVR32_PGTABLE_2LEVEL_H
 10 
 11 #include <asm-generic/pgtable-nopmd.h>
 12 
 13 /*
 14  * Traditional 2-level paging structure
 15  */
 16 #define PGDIR_SHIFT     22
 17 #define PTRS_PER_PGD    1024
 18 
 19 #define PTRS_PER_PTE    1024
 20 
 21 #ifndef __ASSEMBLY__
 22 #define pte_ERROR(e) \
 23         printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
 24 #define pgd_ERROR(e) \
 25         printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
 26 
 27 /*
 28  * Certain architectures need to do special things when PTEs
 29  * within a page table are directly modified.  Thus, the following
 30  * hook is made available.
 31  */
 32 #define set_pte(pteptr, pteval) (*(pteptr) = pteval)
 33 #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep, pteval)
 34 
 35 /*
 36  * (pmds are folded into pgds so this doesn't get actually called,
 37  * but the define is needed for a generic inline function.)
 38  */
 39 #define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
 40 
 41 #define pte_pfn(x)              ((unsigned long)(((x).pte >> PAGE_SHIFT)))
 42 #define pfn_pte(pfn, prot)      __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
 43 #define pfn_pmd(pfn, prot)      __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
 44 
 45 #endif /* !__ASSEMBLY__ */
 46 
 47 #endif /* __ASM_AVR32_PGTABLE_2LEVEL_H */
 48 

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