ARM: OMAP2+: Move iommu2 to drivers/iommu/omap-iommu2.c

This file should not be in arch/arm. Move it to drivers/iommu
to allow making most of the header local to drivers/iommu.

This is needed as we are removing plat and mach includes
from drivers for ARM common zImage support.

Cc: Ido Yariv <ido@wizery.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: linux-media@vger.kernel.org
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

7 files changed, 641 insertions, 22 deletions

diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile
index 14a4d5fc94f..f66b816d455 100644
--- a/drivers/iommu/Makefile
+++ b/drivers/iommu/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_DMAR_TABLE) += dmar.o
 obj-$(CONFIG_INTEL_IOMMU) += iova.o intel-iommu.o
 obj-$(CONFIG_IRQ_REMAP) += intel_irq_remapping.o irq_remapping.o
 obj-$(CONFIG_OMAP_IOMMU) += omap-iommu.o
+obj-$(CONFIG_OMAP_IOMMU) += omap-iommu2.o
 obj-$(CONFIG_OMAP_IOVMM) += omap-iovmm.o
 obj-$(CONFIG_OMAP_IOMMU_DEBUG) += omap-iommu-debug.o
 obj-$(CONFIG_TEGRA_IOMMU_GART) += tegra-gart.o
diff --git a/drivers/iommu/omap-iommu-debug.c b/drivers/iommu/omap-iommu-debug.c
index cf4a0b5c1d8..d0427bd2136 100644
--- a/drivers/iommu/omap-iommu-debug.c
+++ b/drivers/iommu/omap-iommu-debug.c
@@ -23,6 +23,7 @@
 #include <plat/iommu.h>
 
 #include "omap-iopgtable.h"
+#include "omap-iommu.h"
 
 #define MAXCOLUMN 100 /* for short messages */
 
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index eadcfde757e..4db86e12c20 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -22,12 +22,14 @@
 #include <linux/omap-iommu.h>
 #include <linux/mutex.h>
 #include <linux/spinlock.h>
+#include <linux/io.h>
 
 #include <asm/cacheflush.h>
 
 #include <plat/iommu.h>
 
 #include "omap-iopgtable.h"
+#include "omap-iommu.h"
 
 #define for_each_iotlb_cr(obj, n, __i, cr)                              \
         for (__i = 0;                                                   \
@@ -1016,6 +1018,23 @@ static void iopte_cachep_ctor(void *iopte)
         clean_dcache_area(iopte, IOPTE_TABLE_SIZE);
 }
 
+static 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);
+}
+
 static int omap_iommu_map(struct iommu_domain *domain, unsigned long da,
                          phys_addr_t pa, size_t bytes, int prot)
 {
diff --git a/drivers/iommu/omap-iommu.h b/drivers/iommu/omap-iommu.h
new file mode 100644
index 00000000000..8c3378d99b8
--- /dev/null
+++ b/drivers/iommu/omap-iommu.h
@@ -0,0 +1,255 @@
+/*
+ * omap iommu: main structures
+ *
+ * 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.
+ */
+
+#if defined(CONFIG_ARCH_OMAP1)
+#error "iommu for this processor not implemented yet"
+#endif
+
+struct iotlb_entry {
+        u32 da;
+        u32 pa;
+        u32 pgsz, prsvd, valid;
+        union {
+                u16 ap;
+                struct {
+                        u32 endian, elsz, mixed;
+                };
+        };
+};
+
+struct omap_iommu {
+        const char      *name;
+        struct module   *owner;
+        struct clk      *clk;
+        void __iomem    *regbase;
+        struct device   *dev;
+        void            *isr_priv;
+        struct iommu_domain *domain;
+
+        unsigned int    refcount;
+        spinlock_t      iommu_lock;     /* global for this whole object */
+
+        /*
+         * We don't change iopgd for a situation like pgd for a task,
+         * but share it globally for each iommu.
+         */
+        u32             *iopgd;
+        spinlock_t      page_table_lock; /* protect iopgd */
+
+        int             nr_tlb_entries;
+
+        struct list_head        mmap;
+        struct mutex            mmap_lock; /* protect mmap */
+
+        void *ctx; /* iommu context: registres saved area */
+        u32 da_start;
+        u32 da_end;
+};
+
+struct cr_regs {
+        union {
+                struct {
+                        u16 cam_l;
+                        u16 cam_h;
+                };
+                u32 cam;
+        };
+        union {
+                struct {
+                        u16 ram_l;
+                        u16 ram_h;
+                };
+                u32 ram;
+        };
+};
+
+struct iotlb_lock {
+        short base;
+        short vict;
+};
+
+/* architecture specific functions */
+struct iommu_functions {
+        unsigned long   version;
+
+        int (*enable)(struct omap_iommu *obj);
+        void (*disable)(struct omap_iommu *obj);
+        void (*set_twl)(struct omap_iommu *obj, bool on);
+        u32 (*fault_isr)(struct omap_iommu *obj, u32 *ra);
+
+        void (*tlb_read_cr)(struct omap_iommu *obj, struct cr_regs *cr);
+        void (*tlb_load_cr)(struct omap_iommu *obj, struct cr_regs *cr);
+
+        struct cr_regs *(*alloc_cr)(struct omap_iommu *obj,
+                                                        struct iotlb_entry *e);
+        int (*cr_valid)(struct cr_regs *cr);
+        u32 (*cr_to_virt)(struct cr_regs *cr);
+        void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e);
+        ssize_t (*dump_cr)(struct omap_iommu *obj, struct cr_regs *cr,
+                                                        char *buf);
+
+        u32 (*get_pte_attr)(struct iotlb_entry *e);
+
+        void (*save_ctx)(struct omap_iommu *obj);
+        void (*restore_ctx)(struct omap_iommu *obj);
+        ssize_t (*dump_ctx)(struct omap_iommu *obj, char *buf, ssize_t len);
+};
+
+#ifdef CONFIG_IOMMU_API
+/**
+ * dev_to_omap_iommu() - retrieves an omap iommu object from a user device
+ * @dev: iommu client device
+ */
+static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev)
+{
+        struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
+
+        return arch_data->iommu_dev;
+}
+#endif
+
+/* IOMMU errors */
+#define OMAP_IOMMU_ERR_TLB_MISS         (1 << 0)
+#define OMAP_IOMMU_ERR_TRANS_FAULT      (1 << 1)
+#define OMAP_IOMMU_ERR_EMU_MISS         (1 << 2)
+#define OMAP_IOMMU_ERR_TBLWALK_FAULT    (1 << 3)
+#define OMAP_IOMMU_ERR_MULTIHIT_FAULT   (1 << 4)
+
+/*
+ * MMU Register offsets
+ */
+#define MMU_REVISION            0x00
+#define MMU_SYSCONFIG           0x10
+#define MMU_SYSSTATUS           0x14
+#define MMU_IRQSTATUS           0x18
+#define MMU_IRQENABLE           0x1c
+#define MMU_WALKING_ST          0x40
+#define MMU_CNTL                0x44
+#define MMU_FAULT_AD            0x48
+#define MMU_TTB                 0x4c
+#define MMU_LOCK                0x50
+#define MMU_LD_TLB              0x54
+#define MMU_CAM                 0x58
+#define MMU_RAM                 0x5c
+#define MMU_GFLUSH              0x60
+#define MMU_FLUSH_ENTRY         0x64
+#define MMU_READ_CAM            0x68
+#define MMU_READ_RAM            0x6c
+#define MMU_EMU_FAULT_AD        0x70
+
+#define MMU_REG_SIZE            256
+
+/*
+ * MMU Register bit definitions
+ */
+#define MMU_LOCK_BASE_SHIFT     10
+#define MMU_LOCK_BASE_MASK      (0x1f << MMU_LOCK_BASE_SHIFT)
+#define MMU_LOCK_BASE(x)        \
+        ((x & MMU_LOCK_BASE_MASK) >> MMU_LOCK_BASE_SHIFT)
+
+#define MMU_LOCK_VICT_SHIFT     4
+#define MMU_LOCK_VICT_MASK      (0x1f << MMU_LOCK_VICT_SHIFT)
+#define MMU_LOCK_VICT(x)        \
+        ((x & MMU_LOCK_VICT_MASK) >> MMU_LOCK_VICT_SHIFT)
+
+#define MMU_CAM_VATAG_SHIFT     12
+#define MMU_CAM_VATAG_MASK \
+        ((~0UL >> MMU_CAM_VATAG_SHIFT) << MMU_CAM_VATAG_SHIFT)
+#define MMU_CAM_P               (1 << 3)
+#define MMU_CAM_V               (1 << 2)
+#define MMU_CAM_PGSZ_MASK       3
+#define MMU_CAM_PGSZ_1M         (0 << 0)
+#define MMU_CAM_PGSZ_64K        (1 << 0)
+#define MMU_CAM_PGSZ_4K         (2 << 0)
+#define MMU_CAM_PGSZ_16M        (3 << 0)
+
+#define MMU_RAM_PADDR_SHIFT     12
+#define MMU_RAM_PADDR_MASK \
+        ((~0UL >> MMU_RAM_PADDR_SHIFT) << MMU_RAM_PADDR_SHIFT)
+
+#define MMU_RAM_ENDIAN_MASK     (1 << MMU_RAM_ENDIAN_SHIFT)
+#define MMU_RAM_ENDIAN_BIG      (1 << MMU_RAM_ENDIAN_SHIFT)
+
+#define MMU_RAM_ELSZ_MASK       (3 << MMU_RAM_ELSZ_SHIFT)
+#define MMU_RAM_ELSZ_8          (0 << MMU_RAM_ELSZ_SHIFT)
+#define MMU_RAM_ELSZ_16         (1 << MMU_RAM_ELSZ_SHIFT)
+#define MMU_RAM_ELSZ_32         (2 << MMU_RAM_ELSZ_SHIFT)
+#define MMU_RAM_ELSZ_NONE       (3 << MMU_RAM_ELSZ_SHIFT)
+#define MMU_RAM_MIXED_SHIFT     6
+#define MMU_RAM_MIXED_MASK      (1 << MMU_RAM_MIXED_SHIFT)
+#define MMU_RAM_MIXED           MMU_RAM_MIXED_MASK
+
+/*
+ * utilities for super page(16MB, 1MB, 64KB and 4KB)
+ */
+
+#define iopgsz_max(bytes)                       \
+        (((bytes) >= SZ_16M) ? SZ_16M :         \
+         ((bytes) >= SZ_1M)  ? SZ_1M  :         \
+         ((bytes) >= SZ_64K) ? SZ_64K :         \
+         ((bytes) >= SZ_4K)  ? SZ_4K  : 0)
+
+#define bytes_to_iopgsz(bytes)                          \
+        (((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M :       \
+         ((bytes) == SZ_1M)  ? MMU_CAM_PGSZ_1M  :       \
+         ((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K :       \
+         ((bytes) == SZ_4K)  ? MMU_CAM_PGSZ_4K  : -1)
+
+#define iopgsz_to_bytes(iopgsz)                         \
+        (((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M :      \
+         ((iopgsz) == MMU_CAM_PGSZ_1M)  ? SZ_1M  :      \
+         ((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K :      \
+         ((iopgsz) == MMU_CAM_PGSZ_4K)  ? SZ_4K  : 0)
+
+#define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
+
+/*
+ * global functions
+ */
+extern u32 omap_iommu_arch_version(void);
+
+extern void omap_iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
+
+extern int
+omap_iopgtable_store_entry(struct omap_iommu *obj, struct iotlb_entry *e);
+
+extern int omap_iommu_set_isr(const char *name,
+                 int (*isr)(struct omap_iommu *obj, u32 da, u32 iommu_errs,
+                                    void *priv),
+                         void *isr_priv);
+
+extern void omap_iommu_save_ctx(struct device *dev);
+extern void omap_iommu_restore_ctx(struct device *dev);
+
+extern int omap_install_iommu_arch(const struct iommu_functions *ops);
+extern void omap_uninstall_iommu_arch(const struct iommu_functions *ops);
+
+extern int omap_foreach_iommu_device(void *data,
+                                int (*fn)(struct device *, void *));
+
+extern ssize_t
+omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len);
+extern size_t
+omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t len);
+
+/*
+ * register accessors
+ */
+static inline u32 iommu_read_reg(struct omap_iommu *obj, size_t offs)
+{
+        return __raw_readl(obj->regbase + offs);
+}
+
+static inline void iommu_write_reg(struct omap_iommu *obj, u32 val, size_t offs)
+{
+        __raw_writel(val, obj->regbase + offs);
+}
diff --git a/drivers/iommu/omap-iommu2.c b/drivers/iommu/omap-iommu2.c
new file mode 100644
index 00000000000..f97c3863ef8
--- /dev/null
+++ b/drivers/iommu/omap-iommu2.c
@@ -0,0 +1,364 @@
+/*
+ * omap iommu: omap2/3 architecture specific functions
+ *
+ * Copyright (C) 2008-2009 Nokia Corporation
+ *
+ * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>,
+ *              Paul Mundt and Toshihiro Kobayashi
+ *
+ * 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.
+ */
+
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/omap-iommu.h>
+#include <linux/slab.h>
+#include <linux/stringify.h>
+
+#include <plat/iommu.h>
+#include "omap-iommu.h"
+
+/*
+ * omap2 architecture specific register bit definitions
+ */
+#define IOMMU_ARCH_VERSION      0x00000011
+
+/* SYSCONF */
+#define MMU_SYS_IDLE_SHIFT      3
+#define MMU_SYS_IDLE_FORCE      (0 << MMU_SYS_IDLE_SHIFT)
+#define MMU_SYS_IDLE_NONE       (1 << MMU_SYS_IDLE_SHIFT)
+#define MMU_SYS_IDLE_SMART      (2 << MMU_SYS_IDLE_SHIFT)
+#define MMU_SYS_IDLE_MASK       (3 << MMU_SYS_IDLE_SHIFT)
+
+#define MMU_SYS_SOFTRESET       (1 << 1)
+#define MMU_SYS_AUTOIDLE        1
+
+/* SYSSTATUS */
+#define MMU_SYS_RESETDONE       1
+
+/* IRQSTATUS & IRQENABLE */
+#define MMU_IRQ_MULTIHITFAULT   (1 << 4)
+#define MMU_IRQ_TABLEWALKFAULT  (1 << 3)
+#define MMU_IRQ_EMUMISS         (1 << 2)
+#define MMU_IRQ_TRANSLATIONFAULT        (1 << 1)
+#define MMU_IRQ_TLBMISS         (1 << 0)
+
+#define __MMU_IRQ_FAULT         \
+        (MMU_IRQ_MULTIHITFAULT | MMU_IRQ_EMUMISS | MMU_IRQ_TRANSLATIONFAULT)
+#define MMU_IRQ_MASK            \
+        (__MMU_IRQ_FAULT | MMU_IRQ_TABLEWALKFAULT | MMU_IRQ_TLBMISS)
+#define MMU_IRQ_TWL_MASK        (__MMU_IRQ_FAULT | MMU_IRQ_TABLEWALKFAULT)
+#define MMU_IRQ_TLB_MISS_MASK   (__MMU_IRQ_FAULT | MMU_IRQ_TLBMISS)
+
+/* MMU_CNTL */
+#define MMU_CNTL_SHIFT          1
+#define MMU_CNTL_MASK           (7 << MMU_CNTL_SHIFT)
+#define MMU_CNTL_EML_TLB        (1 << 3)
+#define MMU_CNTL_TWL_EN         (1 << 2)
+#define MMU_CNTL_MMU_EN         (1 << 1)
+
+#define get_cam_va_mask(pgsz)                           \
+        (((pgsz) == MMU_CAM_PGSZ_16M) ? 0xff000000 :    \
+         ((pgsz) == MMU_CAM_PGSZ_1M)  ? 0xfff00000 :    \
+         ((pgsz) == MMU_CAM_PGSZ_64K) ? 0xffff0000 :    \
+         ((pgsz) == MMU_CAM_PGSZ_4K)  ? 0xfffff000 : 0)
+
+
+static void __iommu_set_twl(struct omap_iommu *obj, bool on)
+{
+        u32 l = iommu_read_reg(obj, MMU_CNTL);
+
+        if (on)
+                iommu_write_reg(obj, MMU_IRQ_TWL_MASK, MMU_IRQENABLE);
+        else
+                iommu_write_reg(obj, MMU_IRQ_TLB_MISS_MASK, MMU_IRQENABLE);
+
+        l &= ~MMU_CNTL_MASK;
+        if (on)
+                l |= (MMU_CNTL_MMU_EN | MMU_CNTL_TWL_EN);
+        else
+                l |= (MMU_CNTL_MMU_EN);
+
+        iommu_write_reg(obj, l, MMU_CNTL);
+}
+
+
+static int omap2_iommu_enable(struct omap_iommu *obj)
+{
+        u32 l, pa;
+        unsigned long timeout;
+
+        if (!obj->iopgd || !IS_ALIGNED((u32)obj->iopgd,  SZ_16K))
+                return -EINVAL;
+
+        pa = virt_to_phys(obj->iopgd);
+        if (!IS_ALIGNED(pa, SZ_16K))
+                return -EINVAL;
+
+        iommu_write_reg(obj, MMU_SYS_SOFTRESET, MMU_SYSCONFIG);
+
+        timeout = jiffies + msecs_to_jiffies(20);
+        do {
+                l = iommu_read_reg(obj, MMU_SYSSTATUS);
+                if (l & MMU_SYS_RESETDONE)
+                        break;
+        } while (!time_after(jiffies, timeout));
+
+        if (!(l & MMU_SYS_RESETDONE)) {
+                dev_err(obj->dev, "can't take mmu out of reset\n");
+                return -ENODEV;
+        }
+
+        l = iommu_read_reg(obj, MMU_REVISION);
+        dev_info(obj->dev, "%s: version %d.%d\n", obj->name,
+                 (l >> 4) & 0xf, l & 0xf);
+
+        l = iommu_read_reg(obj, MMU_SYSCONFIG);
+        l &= ~MMU_SYS_IDLE_MASK;
+        l |= (MMU_SYS_IDLE_SMART | MMU_SYS_AUTOIDLE);
+        iommu_write_reg(obj, l, MMU_SYSCONFIG);
+
+        iommu_write_reg(obj, pa, MMU_TTB);
+
+        __iommu_set_twl(obj, true);
+
+        return 0;
+}
+
+static void omap2_iommu_disable(struct omap_iommu *obj)
+{
+        u32 l = iommu_read_reg(obj, MMU_CNTL);
+
+        l &= ~MMU_CNTL_MASK;
+        iommu_write_reg(obj, l, MMU_CNTL);
+        iommu_write_reg(obj, MMU_SYS_IDLE_FORCE, MMU_SYSCONFIG);
+
+        dev_dbg(obj->dev, "%s is shutting down\n", obj->name);
+}
+
+static void omap2_iommu_set_twl(struct omap_iommu *obj, bool on)
+{
+        __iommu_set_twl(obj, false);
+}
+
+static u32 omap2_iommu_fault_isr(struct omap_iommu *obj, u32 *ra)
+{
+        u32 stat, da;
+        u32 errs = 0;
+
+        stat = iommu_read_reg(obj, MMU_IRQSTATUS);
+        stat &= MMU_IRQ_MASK;
+        if (!stat) {
+                *ra = 0;
+                return 0;
+        }
+
+        da = iommu_read_reg(obj, MMU_FAULT_AD);
+        *ra = da;
+
+        if (stat & MMU_IRQ_TLBMISS)
+                errs |= OMAP_IOMMU_ERR_TLB_MISS;
+        if (stat & MMU_IRQ_TRANSLATIONFAULT)
+                errs |= OMAP_IOMMU_ERR_TRANS_FAULT;
+        if (stat & MMU_IRQ_EMUMISS)
+                errs |= OMAP_IOMMU_ERR_EMU_MISS;
+        if (stat & MMU_IRQ_TABLEWALKFAULT)
+                errs |= OMAP_IOMMU_ERR_TBLWALK_FAULT;
+        if (stat & MMU_IRQ_MULTIHITFAULT)
+                errs |= OMAP_IOMMU_ERR_MULTIHIT_FAULT;
+        iommu_write_reg(obj, stat, MMU_IRQSTATUS);
+
+        return errs;
+}
+
+static void omap2_tlb_read_cr(struct omap_iommu *obj, struct cr_regs *cr)
+{
+        cr->cam = iommu_read_reg(obj, MMU_READ_CAM);
+        cr->ram = iommu_read_reg(obj, MMU_READ_RAM);
+}
+
+static void omap2_tlb_load_cr(struct omap_iommu *obj, struct cr_regs *cr)
+{
+        iommu_write_reg(obj, cr->cam | MMU_CAM_V, MMU_CAM);
+        iommu_write_reg(obj, cr->ram, MMU_RAM);
+}
+
+static u32 omap2_cr_to_virt(struct cr_regs *cr)
+{
+        u32 page_size = cr->cam & MMU_CAM_PGSZ_MASK;
+        u32 mask = get_cam_va_mask(cr->cam & page_size);
+
+        return cr->cam & mask;
+}
+
+static struct cr_regs *omap2_alloc_cr(struct omap_iommu *obj,
+                                                struct iotlb_entry *e)
+{
+        struct cr_regs *cr;
+
+        if (e->da & ~(get_cam_va_mask(e->pgsz))) {
+                dev_err(obj->dev, "%s:\twrong alignment: %08x\n", __func__,
+                        e->da);
+                return ERR_PTR(-EINVAL);
+        }
+
+        cr = kmalloc(sizeof(*cr), GFP_KERNEL);
+        if (!cr)
+                return ERR_PTR(-ENOMEM);
+
+        cr->cam = (e->da & MMU_CAM_VATAG_MASK) | e->prsvd | e->pgsz | e->valid;
+        cr->ram = e->pa | e->endian | e->elsz | e->mixed;
+
+        return cr;
+}
+
+static inline int omap2_cr_valid(struct cr_regs *cr)
+{
+        return cr->cam & MMU_CAM_V;
+}
+
+static u32 omap2_get_pte_attr(struct iotlb_entry *e)
+{
+        u32 attr;
+
+        attr = e->mixed << 5;
+        attr |= e->endian;
+        attr |= e->elsz >> 3;
+        attr <<= (((e->pgsz == MMU_CAM_PGSZ_4K) ||
+                        (e->pgsz == MMU_CAM_PGSZ_64K)) ? 0 : 6);
+        return attr;
+}
+
+static ssize_t
+omap2_dump_cr(struct omap_iommu *obj, struct cr_regs *cr, char *buf)
+{
+        char *p = buf;
+
+        /* FIXME: Need more detail analysis of cam/ram */
+        p += sprintf(p, "%08x %08x %01x\n", cr->cam, cr->ram,
+                                        (cr->cam & MMU_CAM_P) ? 1 : 0);
+
+        return p - buf;
+}
+
+#define pr_reg(name)                                                    \
+        do {                                                            \
+                ssize_t bytes;                                          \
+                const char *str = "%20s: %08x\n";                       \
+                const int maxcol = 32;                                  \
+                bytes = snprintf(p, maxcol, str, __stringify(name),     \
+                                 iommu_read_reg(obj, MMU_##name));      \
+                p += bytes;                                             \
+                len -= bytes;                                           \
+                if (len < maxcol)                                       \
+                        goto out;                                       \
+        } while (0)
+
+static ssize_t
+omap2_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len)
+{
+        char *p = buf;
+
+        pr_reg(REVISION);
+        pr_reg(SYSCONFIG);
+        pr_reg(SYSSTATUS);
+        pr_reg(IRQSTATUS);
+        pr_reg(IRQENABLE);
+        pr_reg(WALKING_ST);
+        pr_reg(CNTL);
+        pr_reg(FAULT_AD);
+        pr_reg(TTB);
+        pr_reg(LOCK);
+        pr_reg(LD_TLB);
+        pr_reg(CAM);
+        pr_reg(RAM);
+        pr_reg(GFLUSH);
+        pr_reg(FLUSH_ENTRY);
+        pr_reg(READ_CAM);
+        pr_reg(READ_RAM);
+        pr_reg(EMU_FAULT_AD);
+out:
+        return p - buf;
+}
+
+static void omap2_iommu_save_ctx(struct omap_iommu *obj)
+{
+        int i;
+        u32 *p = obj->ctx;
+
+        for (i = 0; i < (MMU_REG_SIZE / sizeof(u32)); i++) {
+                p[i] = iommu_read_reg(obj, i * sizeof(u32));
+                dev_dbg(obj->dev, "%s\t[%02d] %08x\n", __func__, i, p[i]);
+        }
+
+        BUG_ON(p[0] != IOMMU_ARCH_VERSION);
+}
+
+static void omap2_iommu_restore_ctx(struct omap_iommu *obj)
+{
+        int i;
+        u32 *p = obj->ctx;
+
+        for (i = 0; i < (MMU_REG_SIZE / sizeof(u32)); i++) {
+                iommu_write_reg(obj, p[i], i * sizeof(u32));
+                dev_dbg(obj->dev, "%s\t[%02d] %08x\n", __func__, i, p[i]);
+        }
+
+        BUG_ON(p[0] != IOMMU_ARCH_VERSION);
+}
+
+static void omap2_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e)
+{
+        e->da           = cr->cam & MMU_CAM_VATAG_MASK;
+        e->pa           = cr->ram & MMU_RAM_PADDR_MASK;
+        e->valid        = cr->cam & MMU_CAM_V;
+        e->pgsz         = cr->cam & MMU_CAM_PGSZ_MASK;
+        e->endian       = cr->ram & MMU_RAM_ENDIAN_MASK;
+        e->elsz         = cr->ram & MMU_RAM_ELSZ_MASK;
+        e->mixed        = cr->ram & MMU_RAM_MIXED;
+}
+
+static const struct iommu_functions omap2_iommu_ops = {
+        .version        = IOMMU_ARCH_VERSION,
+
+        .enable         = omap2_iommu_enable,
+        .disable        = omap2_iommu_disable,
+        .set_twl        = omap2_iommu_set_twl,
+        .fault_isr      = omap2_iommu_fault_isr,
+
+        .tlb_read_cr    = omap2_tlb_read_cr,
+        .tlb_load_cr    = omap2_tlb_load_cr,
+
+        .cr_to_e        = omap2_cr_to_e,
+        .cr_to_virt     = omap2_cr_to_virt,
+        .alloc_cr       = omap2_alloc_cr,
+        .cr_valid       = omap2_cr_valid,
+        .dump_cr        = omap2_dump_cr,
+
+        .get_pte_attr   = omap2_get_pte_attr,
+
+        .save_ctx       = omap2_iommu_save_ctx,
+        .restore_ctx    = omap2_iommu_restore_ctx,
+        .dump_ctx       = omap2_iommu_dump_ctx,
+};
+
+static int __init omap2_iommu_init(void)
+{
+        return omap_install_iommu_arch(&omap2_iommu_ops);
+}
+module_init(omap2_iommu_init);
+
+static void __exit omap2_iommu_exit(void)
+{
+        omap_uninstall_iommu_arch(&omap2_iommu_ops);
+}
+module_exit(omap2_iommu_exit);
+
+MODULE_AUTHOR("Hiroshi DOYU, Paul Mundt and Toshihiro Kobayashi");
+MODULE_DESCRIPTION("omap iommu: omap2/3 architecture specific functions");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iommu/omap-iopgtable.h b/drivers/iommu/omap-iopgtable.h
index 66a813977d5..cd4ae9e5b0c 100644
--- a/drivers/iommu/omap-iopgtable.h
+++ b/drivers/iommu/omap-iopgtable.h
@@ -10,9 +10,6 @@
  * published by the Free Software Foundation.
  */
 
-#ifndef __PLAT_OMAP_IOMMU_H
-#define __PLAT_OMAP_IOMMU_H
-
 /*
  * "L2 table" address mask and size definitions.
  */
@@ -97,24 +94,5 @@ static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask)
 #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 */
diff --git a/drivers/iommu/omap-iovmm.c b/drivers/iommu/omap-iovmm.c
index 9852101cf04..3e3b2421b92 100644
--- a/drivers/iommu/omap-iovmm.c
+++ b/drivers/iommu/omap-iovmm.c
@@ -25,6 +25,7 @@
 #include <plat/iommu.h>
 
 #include "omap-iopgtable.h"
+#include "omap-iommu.h"
 
 /*
  * IOVMF_FLAGS: attribute for iommu virtual memory area(iovma)