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iopgtable.h

/*
 * omap iommu: pagetable definitions
 *
 * Copyright (C) 2008-2009 Nokia Corporation
 *
 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __PLAT_OMAP_IOMMU_H
#define __PLAT_OMAP_IOMMU_H

#define IOPGD_SHIFT           20
#define IOPGD_SIZE            (1 << IOPGD_SHIFT)
#define IOPGD_MASK            (~(IOPGD_SIZE - 1))
#define IOSECTION_MASK        IOPGD_MASK
#define PTRS_PER_IOPGD        (1 << (32 - IOPGD_SHIFT))
#define IOPGD_TABLE_SIZE      (PTRS_PER_IOPGD * sizeof(u32))

#define IOSUPER_SIZE          (IOPGD_SIZE << 4)
#define IOSUPER_MASK          (~(IOSUPER_SIZE - 1))

#define IOPTE_SHIFT           12
#define IOPTE_SIZE            (1 << IOPTE_SHIFT)
#define IOPTE_MASK            (~(IOPTE_SIZE - 1))
#define IOPAGE_MASK           IOPTE_MASK
#define PTRS_PER_IOPTE        (1 << (IOPGD_SHIFT - IOPTE_SHIFT))
#define IOPTE_TABLE_SIZE      (PTRS_PER_IOPTE * sizeof(u32))

#define IOLARGE_SIZE          (IOPTE_SIZE << 4)
#define IOLARGE_MASK          (~(IOLARGE_SIZE - 1))

#define IOPGD_TABLE           (1 << 0)
#define IOPGD_SECTION         (2 << 0)
#define IOPGD_SUPER           (1 << 18 | 2 << 0)

#define IOPTE_SMALL           (2 << 0)
#define IOPTE_LARGE           (1 << 0)

#define iopgd_index(da)       (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
#define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da))

#define iopte_paddr(iopgd)    (*iopgd & ~((1 << 10) - 1))
#define iopte_vaddr(iopgd)    ((u32 *)phys_to_virt(iopte_paddr(iopgd)))

#define iopte_index(da)       (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
#define iopte_offset(iopgd, da)     (iopte_vaddr(iopgd) + iopte_index(da))

static inline u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa,
                           u32 flags)
{
      memset(e, 0, sizeof(*e));

      e->da       = da;
      e->pa       = pa;
      e->valid    = 1;
      /* FIXME: add OMAP1 support */
      e->pgsz           = flags & MMU_CAM_PGSZ_MASK;
      e->endian   = flags & MMU_RAM_ENDIAN_MASK;
      e->elsz           = flags & MMU_RAM_ELSZ_MASK;
      e->mixed    = flags & MMU_RAM_MIXED_MASK;

      return iopgsz_to_bytes(e->pgsz);
}

#define to_iommu(dev)                                       \
      (struct iommu *)platform_get_drvdata(to_platform_device(dev))

#endif /* __PLAT_OMAP_IOMMU_H */

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