omap-iopgtable.h 2.7 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-only */
  2. /*
  3. * omap iommu: pagetable definitions
  4. *
  5. * Copyright (C) 2008-2010 Nokia Corporation
  6. *
  7. * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
  8. */
  9. #ifndef _OMAP_IOPGTABLE_H
  10. #define _OMAP_IOPGTABLE_H
  11. #include <linux/bitops.h>
  12. /*
  13. * "L2 table" address mask and size definitions.
  14. */
  15. #define IOPGD_SHIFT 20
  16. #define IOPGD_SIZE BIT(IOPGD_SHIFT)
  17. #define IOPGD_MASK (~(IOPGD_SIZE - 1))
  18. /*
  19. * "section" address mask and size definitions.
  20. */
  21. #define IOSECTION_SHIFT 20
  22. #define IOSECTION_SIZE BIT(IOSECTION_SHIFT)
  23. #define IOSECTION_MASK (~(IOSECTION_SIZE - 1))
  24. /*
  25. * "supersection" address mask and size definitions.
  26. */
  27. #define IOSUPER_SHIFT 24
  28. #define IOSUPER_SIZE BIT(IOSUPER_SHIFT)
  29. #define IOSUPER_MASK (~(IOSUPER_SIZE - 1))
  30. #define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT))
  31. #define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32))
  32. /*
  33. * "small page" address mask and size definitions.
  34. */
  35. #define IOPTE_SHIFT 12
  36. #define IOPTE_SIZE BIT(IOPTE_SHIFT)
  37. #define IOPTE_MASK (~(IOPTE_SIZE - 1))
  38. /*
  39. * "large page" address mask and size definitions.
  40. */
  41. #define IOLARGE_SHIFT 16
  42. #define IOLARGE_SIZE BIT(IOLARGE_SHIFT)
  43. #define IOLARGE_MASK (~(IOLARGE_SIZE - 1))
  44. #define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT))
  45. #define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32))
  46. #define IOPAGE_MASK IOPTE_MASK
  47. /**
  48. * omap_iommu_translate() - va to pa translation
  49. * @d: omap iommu descriptor
  50. * @va: virtual address
  51. * @mask: omap iommu descriptor mask
  52. *
  53. * va to pa translation
  54. */
  55. static inline phys_addr_t omap_iommu_translate(unsigned long d, dma_addr_t va,
  56. dma_addr_t mask)
  57. {
  58. return (d & mask) | (va & (~mask));
  59. }
  60. /*
  61. * some descriptor attributes.
  62. */
  63. #define IOPGD_TABLE (1)
  64. #define IOPGD_SECTION (2)
  65. #define IOPGD_SUPER (BIT(18) | IOPGD_SECTION)
  66. #define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE)
  67. #define iopgd_is_section(x) (((x) & (1 << 18 | 3)) == IOPGD_SECTION)
  68. #define iopgd_is_super(x) (((x) & (1 << 18 | 3)) == IOPGD_SUPER)
  69. #define IOPTE_SMALL (2)
  70. #define IOPTE_LARGE (1)
  71. #define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL)
  72. #define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE)
  73. /* to find an entry in a page-table-directory */
  74. #define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
  75. #define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da))
  76. #define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1))
  77. #define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd)))
  78. /* to find an entry in the second-level page table. */
  79. #define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
  80. #define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da))
  81. #endif /* _OMAP_IOPGTABLE_H */