arch/arm/plat-omap/iopgtable.h

   1 /*
   2  * omap iommu: pagetable definitions
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #ifndef __PLAT_OMAP_IOMMU_H
  14 #define __PLAT_OMAP_IOMMU_H
  15
  16 #define IOPGD_SHIFT             20
  17 #define IOPGD_SIZE              (1 << IOPGD_SHIFT)
  18 #define IOPGD_MASK              (~(IOPGD_SIZE - 1))
  19 #define IOSECTION_MASK          IOPGD_MASK
  20 #define PTRS_PER_IOPGD          (1 << (32 - IOPGD_SHIFT))
  21 #define IOPGD_TABLE_SIZE        (PTRS_PER_IOPGD * sizeof(u32))
  22
  23 #define IOSUPER_SIZE            (IOPGD_SIZE << 4)
  24 #define IOSUPER_MASK            (~(IOSUPER_SIZE - 1))
  25
  26 #define IOPTE_SHIFT             12
  27 #define IOPTE_SIZE              (1 << IOPTE_SHIFT)
  28 #define IOPTE_MASK              (~(IOPTE_SIZE - 1))
  29 #define IOPAGE_MASK             IOPTE_MASK
  30 #define PTRS_PER_IOPTE          (1 << (IOPGD_SHIFT - IOPTE_SHIFT))
  31 #define IOPTE_TABLE_SIZE        (PTRS_PER_IOPTE * sizeof(u32))
  32
  33 #define IOLARGE_SIZE            (IOPTE_SIZE << 4)
  34 #define IOLARGE_MASK            (~(IOLARGE_SIZE - 1))
  35
  36 #define IOPGD_TABLE             (1 << 0)
  37 #define IOPGD_SECTION           (2 << 0)
  38 #define IOPGD_SUPER             (1 << 18 | 2 << 0)
  39
  40 #define IOPTE_SMALL             (2 << 0)
  41 #define IOPTE_LARGE             (1 << 0)
  42
  43 #define iopgd_index(da)         (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
  44 #define iopgd_offset(obj, da)   ((obj)->iopgd + iopgd_index(da))
  45
  46 #define iopte_paddr(iopgd)      (*iopgd & ~((1 << 10) - 1))
  47 #define iopte_vaddr(iopgd)      ((u32 *)phys_to_virt(iopte_paddr(iopgd)))
  48
  49 #define iopte_index(da)         (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
  50 #define iopte_offset(iopgd, da) (iopte_vaddr(iopgd) + iopte_index(da))
  51
  52 static inline u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa,
  53                                    u32 flags)
  54 {
  55         memset(e, 0, sizeof(*e));
  56
  57         e->da           = da;
  58         e->pa           = pa;
  59         e->valid        = 1;
  60         /* FIXME: add OMAP1 support */
  61         e->pgsz         = flags & MMU_CAM_PGSZ_MASK;
  62         e->endian       = flags & MMU_RAM_ENDIAN_MASK;
  63         e->elsz         = flags & MMU_RAM_ELSZ_MASK;
  64         e->mixed        = flags & MMU_RAM_MIXED_MASK;
  65
  66         return iopgsz_to_bytes(e->pgsz);
  67 }
  68
  69 #define to_iommu(dev)                                                   \
  70         (struct iommu *)platform_get_drvdata(to_platform_device(dev))
  71
  72 #endif /* __PLAT_OMAP_IOMMU_H */