omap iommu: omap2 architecture specific functions

The structure 'arch_mmu' accommodates the difference between omap1 and
omap2/3.

This patch provides omap2/3 specific functions

Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/include/mach/iommu2.h b/arch/arm/plat-omap/include/mach/iommu2.h
new file mode 100644
index 000000000000..10ad05f410e9
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/iommu2.h
@@ -0,0 +1,96 @@
+/*
+ * omap iommu: omap2 architecture specific 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 __MACH_IOMMU2_H
+#define __MACH_IOMMU2_H
+
+#include <linux/io.h>
+
+/*
+ * 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_SHIFT    9
+#define MMU_RAM_ENDIAN_MASK     (1 << MMU_RAM_ENDIAN_SHIFT)
+#define MMU_RAM_ENDIAN_BIG      (1 << MMU_RAM_ENDIAN_SHIFT)
+#define MMU_RAM_ENDIAN_LITTLE   (0 << MMU_RAM_ENDIAN_SHIFT)
+#define MMU_RAM_ELSZ_SHIFT      7
+#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
+
+/*
+ * register accessors
+ */
+static inline u32 iommu_read_reg(struct iommu *obj, size_t offs)
+{
+        return __raw_readl(obj->regbase + offs);
+}
+
+static inline void iommu_write_reg(struct iommu *obj, u32 val, size_t offs)
+{
+        __raw_writel(val, obj->regbase + offs);
+}
+
+#endif /* __MACH_IOMMU2_H */