Logo Search packages:      
Sourcecode: linux version File versions  Download package

iopgtable.h

/*
 * omap iommu: pagetable definitions
 *
 * Copyright (C) 2008-2010 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

/*
 * "L2 table" address mask and size definitions.
 */
#define IOPGD_SHIFT           20
#define IOPGD_SIZE            (1UL << IOPGD_SHIFT)
#define IOPGD_MASK            (~(IOPGD_SIZE - 1))

/*
 * "section" address mask and size definitions.
 */
#define IOSECTION_SHIFT       20
#define IOSECTION_SIZE        (1UL << IOSECTION_SHIFT)
#define IOSECTION_MASK        (~(IOSECTION_SIZE - 1))

/*
 * "supersection" address mask and size definitions.
 */
#define IOSUPER_SHIFT         24
#define IOSUPER_SIZE          (1UL << IOSUPER_SHIFT)
#define IOSUPER_MASK          (~(IOSUPER_SIZE - 1))

#define PTRS_PER_IOPGD        (1UL << (32 - IOPGD_SHIFT))
#define IOPGD_TABLE_SIZE      (PTRS_PER_IOPGD * sizeof(u32))

/*
 * "small page" address mask and size definitions.
 */
#define IOPTE_SHIFT           12
#define IOPTE_SIZE            (1UL << IOPTE_SHIFT)
#define IOPTE_MASK            (~(IOPTE_SIZE - 1))

/*
 * "large page" address mask and size definitions.
 */
#define IOLARGE_SHIFT         16
#define IOLARGE_SIZE          (1UL << IOLARGE_SHIFT)
#define IOLARGE_MASK          (~(IOLARGE_SIZE - 1))

#define PTRS_PER_IOPTE        (1UL << (IOPGD_SHIFT - IOPTE_SHIFT))
#define IOPTE_TABLE_SIZE      (PTRS_PER_IOPTE * sizeof(u32))

#define IOPAGE_MASK           IOPTE_MASK

/*
 * some descriptor attributes.
 */
#define IOPGD_TABLE           (1 << 0)
#define IOPGD_SECTION         (2 << 0)
#define IOPGD_SUPER           (1 << 18 | 2 << 0)

#define iopgd_is_table(x)     (((x) & 3) == IOPGD_TABLE)

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

/* to find an entry in a page-table-directory */
#define iopgd_index(da)       (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
#define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da))

#define iopgd_page_paddr(iopgd)     (*iopgd & ~((1 << 10) - 1))
#define iopgd_page_vaddr(iopgd)     ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd)))

/* to find an entry in the second-level page table. */
#define iopte_index(da)       (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
#define iopte_offset(iopgd, da)     (iopgd_page_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 */

Generated by  Doxygen 1.6.0   Back to index