omap iommu: tlb and pagetable primitives
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>
diff --git a/arch/arm/plat-omap/iopgtable.h b/arch/arm/plat-omap/iopgtable.h
new file mode 100644
index 0000000..37dac43
--- /dev/null
+++ b/arch/arm/plat-omap/iopgtable.h
@@ -0,0 +1,72 @@
+/*
+ * omap iommu: pagetable definitions
+ *
+ * Copyright (C) 2008-2009 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
+
+#define IOPGD_SHIFT 20
+#define IOPGD_SIZE (1 << IOPGD_SHIFT)
+#define IOPGD_MASK (~(IOPGD_SIZE - 1))
+#define IOSECTION_MASK IOPGD_MASK
+#define PTRS_PER_IOPGD (1 << (32 - IOPGD_SHIFT))
+#define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32))
+
+#define IOSUPER_SIZE (IOPGD_SIZE << 4)
+#define IOSUPER_MASK (~(IOSUPER_SIZE - 1))
+
+#define IOPTE_SHIFT 12
+#define IOPTE_SIZE (1 << IOPTE_SHIFT)
+#define IOPTE_MASK (~(IOPTE_SIZE - 1))
+#define IOPAGE_MASK IOPTE_MASK
+#define PTRS_PER_IOPTE (1 << (IOPGD_SHIFT - IOPTE_SHIFT))
+#define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32))
+
+#define IOLARGE_SIZE (IOPTE_SIZE << 4)
+#define IOLARGE_MASK (~(IOLARGE_SIZE - 1))
+
+#define IOPGD_TABLE (1 << 0)
+#define IOPGD_SECTION (2 << 0)
+#define IOPGD_SUPER (1 << 18 | 2 << 0)
+
+#define IOPTE_SMALL (2 << 0)
+#define IOPTE_LARGE (1 << 0)
+
+#define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
+#define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da))
+
+#define iopte_paddr(iopgd) (*iopgd & ~((1 << 10) - 1))
+#define iopte_vaddr(iopgd) ((u32 *)phys_to_virt(iopte_paddr(iopgd)))
+
+#define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
+#define iopte_offset(iopgd, da) (iopte_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 */