/arch/um/include/asm/pgalloc.h

http://github.com/mirrors/linux · C Header · 47 lines · 26 code · 12 blank · 9 comment · 1 complexity · 549ffbbbe6fe08899f1a3cee1900d721 MD5 · raw file 

    

  1. /* SPDX-License-Identifier: GPL-2.0 */
    2. 

  2. /* 
    3. 

  3.  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
    4. 

  4.  * Copyright 2003 PathScale, Inc.
    5. 

  5.  * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h
    6. 

  6.  */
    7. 

  7. 

  8. #ifndef __UM_PGALLOC_H
    9. 

  9. #define __UM_PGALLOC_H
    10. 

  10. 

  11. #include <linux/mm.h>
    12. 

  12. 

  13. #include <asm-generic/pgalloc.h>	/* for pte_{alloc,free}_one */
    14. 

  14. 

  15. #define pmd_populate_kernel(mm, pmd, pte) \
    16. 

  16. 	set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
    17. 

  17. 

  18. #define pmd_populate(mm, pmd, pte) 				\
    19. 

  19. 	set_pmd(pmd, __pmd(_PAGE_TABLE +			\
    20. 

  20. 		((unsigned long long)page_to_pfn(pte) <<	\
    21. 

  21. 			(unsigned long long) PAGE_SHIFT)))
    22. 

  22. #define pmd_pgtable(pmd) pmd_page(pmd)
    23. 

  23. 

  24. /*
    25. 

  25.  * Allocate and free page tables.
    26. 

  26.  */
    27. 

  27. extern pgd_t *pgd_alloc(struct mm_struct *);
    28. 

  28. extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
    29. 

  29. 

  30. #define __pte_free_tlb(tlb,pte, address)		\
    31. 

  31. do {							\
    32. 

  32. 	pgtable_pte_page_dtor(pte);			\
    33. 

  33. 	tlb_remove_page((tlb),(pte));			\
    34. 

  34. } while (0)
    35. 

  35. 

  36. #ifdef CONFIG_3_LEVEL_PGTABLES
    37. 

  37. 

  38. static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
    39. 

  39. {
    40. 

  40. 	free_page((unsigned long)pmd);
    41. 

  41. }
    42. 

  42. 

  43. #define __pmd_free_tlb(tlb,x, address)   tlb_remove_page((tlb),virt_to_page(x))
    44. 

  44. #endif
    45. 

  45. 

  46. #endif
    47.