1 files changed, 98 insertions, 0 deletions

diff --git a/drivers/iommu/omap-iopgtable.h b/drivers/iommu/omap-iopgtable.h
new file mode 100644
index 000000000000..cd4ae9e5b0c6
--- /dev/null
+++ b/drivers/iommu/omap-iopgtable.h
@@ -0,0 +1,98 @@
+/*
+ * 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.
+ */
+
+/*
+ * "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
+
+/**
+ * omap_iommu_translate() - va to pa translation
+ * @d:          omap iommu descriptor
+ * @va:         virtual address
+ * @mask:       omap iommu descriptor mask
+ *
+ * va to pa translation
+ */
+static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask)
+{
+        return (d & mask) | (va & (~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 iopgd_is_section(x)     (((x) & (1 << 18 | 3)) == IOPGD_SECTION)
+#define iopgd_is_super(x)       (((x) & (1 << 18 | 3)) == IOPGD_SUPER)
+
+#define IOPTE_SMALL             (2 << 0)
+#define IOPTE_LARGE             (1 << 0)
+
+#define iopte_is_small(x)       (((x) & 2) == IOPTE_SMALL)
+#define iopte_is_large(x)       (((x) & 3) == IOPTE_LARGE)
+
+/* 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))
+
+#define to_iommu(dev)                                                   \
+        (struct omap_iommu *)platform_get_drvdata(to_platform_device(dev))