1 files changed, 102 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/include/plat/iopgtable.h b/arch/arm/plat-omap/include/plat/iopgtable.h
new file mode 100644
index 00000000000..e0c56aafc2e
--- /dev/null
+++ b/arch/arm/plat-omap/include/plat/iopgtable.h
@@ -0,0 +1,102 @@
+/*
+ * 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 omap_iommu *)platform_get_drvdata(to_platform_device(dev))
+
+#endif /* __PLAT_OMAP_IOMMU_H */