page_32.h 1.3 KB

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  1. #ifndef _ASM_POWERPC_PAGE_32_H
  2. #define _ASM_POWERPC_PAGE_32_H
  3. #if defined(CONFIG_PHYSICAL_ALIGN) && (CONFIG_PHYSICAL_START != 0)
  4. #if (CONFIG_PHYSICAL_START % CONFIG_PHYSICAL_ALIGN) != 0
  5. #error "CONFIG_PHYSICAL_START must be a multiple of CONFIG_PHYSICAL_ALIGN"
  6. #endif
  7. #endif
  8. #define VM_DATA_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS32
  9. #ifdef CONFIG_NOT_COHERENT_CACHE
  10. #define ARCH_DMA_MINALIGN L1_CACHE_BYTES
  11. #endif
  12. #ifdef CONFIG_PTE_64BIT
  13. #define PTE_FLAGS_OFFSET 4 /* offset of PTE flags, in bytes */
  14. #else
  15. #define PTE_FLAGS_OFFSET 0
  16. #endif
  17. #ifdef CONFIG_PPC_256K_PAGES
  18. #define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2 - 2) /* 1/4 of a page */
  19. #else
  20. #define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2) /* full page */
  21. #endif
  22. #ifndef __ASSEMBLY__
  23. /*
  24. * The basic type of a PTE - 64 bits for those CPUs with > 32 bit
  25. * physical addressing.
  26. */
  27. #ifdef CONFIG_PTE_64BIT
  28. typedef unsigned long long pte_basic_t;
  29. #else
  30. typedef unsigned long pte_basic_t;
  31. #endif
  32. struct page;
  33. extern void clear_pages(void *page, int order);
  34. static inline void clear_page(void *page) { clear_pages(page, 0); }
  35. extern void copy_page(void *to, void *from);
  36. #include <asm-generic/getorder.h>
  37. #define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1)
  38. #define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1)
  39. #endif /* __ASSEMBLY__ */
  40. #endif /* _ASM_POWERPC_PAGE_32_H */