103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/*
|
|
* 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 */
|