a9dcad5e37
This patch provides: - iotlb_*() : iommu tlb operations - iopgtable_*() : iommu pagetable(twl) operations - iommu_*() : the other generic operations and the entry points to register and acquire iommu object. Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/*
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* omap iommu: pagetable definitions
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*
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* Copyright (C) 2008-2009 Nokia Corporation
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*
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* Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __PLAT_OMAP_IOMMU_H
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#define __PLAT_OMAP_IOMMU_H
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#define IOPGD_SHIFT 20
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#define IOPGD_SIZE (1 << IOPGD_SHIFT)
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#define IOPGD_MASK (~(IOPGD_SIZE - 1))
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#define IOSECTION_MASK IOPGD_MASK
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#define PTRS_PER_IOPGD (1 << (32 - IOPGD_SHIFT))
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#define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32))
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#define IOSUPER_SIZE (IOPGD_SIZE << 4)
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#define IOSUPER_MASK (~(IOSUPER_SIZE - 1))
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#define IOPTE_SHIFT 12
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#define IOPTE_SIZE (1 << IOPTE_SHIFT)
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#define IOPTE_MASK (~(IOPTE_SIZE - 1))
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#define IOPAGE_MASK IOPTE_MASK
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#define PTRS_PER_IOPTE (1 << (IOPGD_SHIFT - IOPTE_SHIFT))
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#define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32))
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#define IOLARGE_SIZE (IOPTE_SIZE << 4)
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#define IOLARGE_MASK (~(IOLARGE_SIZE - 1))
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#define IOPGD_TABLE (1 << 0)
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#define IOPGD_SECTION (2 << 0)
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#define IOPGD_SUPER (1 << 18 | 2 << 0)
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#define IOPTE_SMALL (2 << 0)
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#define IOPTE_LARGE (1 << 0)
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#define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
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#define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da))
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#define iopte_paddr(iopgd) (*iopgd & ~((1 << 10) - 1))
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#define iopte_vaddr(iopgd) ((u32 *)phys_to_virt(iopte_paddr(iopgd)))
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#define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
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#define iopte_offset(iopgd, da) (iopte_vaddr(iopgd) + iopte_index(da))
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static inline u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa,
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u32 flags)
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{
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memset(e, 0, sizeof(*e));
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e->da = da;
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e->pa = pa;
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e->valid = 1;
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/* FIXME: add OMAP1 support */
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e->pgsz = flags & MMU_CAM_PGSZ_MASK;
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e->endian = flags & MMU_RAM_ENDIAN_MASK;
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e->elsz = flags & MMU_RAM_ELSZ_MASK;
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e->mixed = flags & MMU_RAM_MIXED_MASK;
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return iopgsz_to_bytes(e->pgsz);
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}
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#define to_iommu(dev) \
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(struct iommu *)platform_get_drvdata(to_platform_device(dev))
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#endif /* __PLAT_OMAP_IOMMU_H */
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