Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

10 files changed, 2685 insertions, 0 deletions

diff --git a/kernel/arch/c6x/platforms/Kconfig b/kernel/arch/c6x/platforms/Kconfig
new file mode 100644
index 000000000..c4a0fad89
--- /dev/null
+++ b/kernel/arch/c6x/platforms/Kconfig
@@ -0,0 +1,20 @@
+
+config SOC_TMS320C6455
+	bool "TMS320C6455"
+	default n
+
+config SOC_TMS320C6457
+	bool "TMS320C6457"
+	default n
+
+config SOC_TMS320C6472
+	bool "TMS320C6472"
+	default n
+
+config SOC_TMS320C6474
+	bool "TMS320C6474"
+	default n
+
+config SOC_TMS320C6678
+	bool "TMS320C6678"
+	default n
diff --git a/kernel/arch/c6x/platforms/Makefile b/kernel/arch/c6x/platforms/Makefile
new file mode 100644
index 000000000..9a95b9bca
--- /dev/null
+++ b/kernel/arch/c6x/platforms/Makefile
@@ -0,0 +1,12 @@
+#
+# Makefile for arch/c6x/platforms
+#
+# Copyright 2010, 2011 Texas Instruments Incorporated
+#
+
+obj-y = platform.o cache.o megamod-pic.o pll.o plldata.o timer64.o
+obj-y += dscr.o
+
+# SoC objects
+obj-$(CONFIG_SOC_TMS320C6455)   += emif.o
+obj-$(CONFIG_SOC_TMS320C6457)   += emif.o
diff --git a/kernel/arch/c6x/platforms/cache.c b/kernel/arch/c6x/platforms/cache.c
new file mode 100644
index 000000000..46fd2d530
--- /dev/null
+++ b/kernel/arch/c6x/platforms/cache.c
@@ -0,0 +1,447 @@
+/*
+ *  Copyright (C) 2011 Texas Instruments Incorporated
+ *  Author: Mark Salter <msalter@redhat.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.
+ */
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+
+#include <asm/cache.h>
+#include <asm/soc.h>
+
+/*
+ * Internal Memory Control Registers for caches
+ */
+#define IMCR_CCFG	  0x0000
+#define IMCR_L1PCFG	  0x0020
+#define IMCR_L1PCC	  0x0024
+#define IMCR_L1DCFG	  0x0040
+#define IMCR_L1DCC	  0x0044
+#define IMCR_L2ALLOC0	  0x2000
+#define IMCR_L2ALLOC1	  0x2004
+#define IMCR_L2ALLOC2	  0x2008
+#define IMCR_L2ALLOC3	  0x200c
+#define IMCR_L2WBAR	  0x4000
+#define IMCR_L2WWC	  0x4004
+#define IMCR_L2WIBAR	  0x4010
+#define IMCR_L2WIWC	  0x4014
+#define IMCR_L2IBAR	  0x4018
+#define IMCR_L2IWC	  0x401c
+#define IMCR_L1PIBAR	  0x4020
+#define IMCR_L1PIWC	  0x4024
+#define IMCR_L1DWIBAR	  0x4030
+#define IMCR_L1DWIWC	  0x4034
+#define IMCR_L1DWBAR	  0x4040
+#define IMCR_L1DWWC	  0x4044
+#define IMCR_L1DIBAR	  0x4048
+#define IMCR_L1DIWC	  0x404c
+#define IMCR_L2WB	  0x5000
+#define IMCR_L2WBINV	  0x5004
+#define IMCR_L2INV	  0x5008
+#define IMCR_L1PINV	  0x5028
+#define IMCR_L1DWB	  0x5040
+#define IMCR_L1DWBINV	  0x5044
+#define IMCR_L1DINV	  0x5048
+#define IMCR_MAR_BASE	  0x8000
+#define IMCR_MAR96_111	  0x8180
+#define IMCR_MAR128_191   0x8200
+#define IMCR_MAR224_239   0x8380
+#define IMCR_L2MPFAR	  0xa000
+#define IMCR_L2MPFSR	  0xa004
+#define IMCR_L2MPFCR	  0xa008
+#define IMCR_L2MPLK0	  0xa100
+#define IMCR_L2MPLK1	  0xa104
+#define IMCR_L2MPLK2	  0xa108
+#define IMCR_L2MPLK3	  0xa10c
+#define IMCR_L2MPLKCMD	  0xa110
+#define IMCR_L2MPLKSTAT   0xa114
+#define IMCR_L2MPPA_BASE  0xa200
+#define IMCR_L1PMPFAR	  0xa400
+#define IMCR_L1PMPFSR	  0xa404
+#define IMCR_L1PMPFCR	  0xa408
+#define IMCR_L1PMPLK0	  0xa500
+#define IMCR_L1PMPLK1	  0xa504
+#define IMCR_L1PMPLK2	  0xa508
+#define IMCR_L1PMPLK3	  0xa50c
+#define IMCR_L1PMPLKCMD   0xa510
+#define IMCR_L1PMPLKSTAT  0xa514
+#define IMCR_L1PMPPA_BASE 0xa600
+#define IMCR_L1DMPFAR	  0xac00
+#define IMCR_L1DMPFSR	  0xac04
+#define IMCR_L1DMPFCR	  0xac08
+#define IMCR_L1DMPLK0	  0xad00
+#define IMCR_L1DMPLK1	  0xad04
+#define IMCR_L1DMPLK2	  0xad08
+#define IMCR_L1DMPLK3	  0xad0c
+#define IMCR_L1DMPLKCMD   0xad10
+#define IMCR_L1DMPLKSTAT  0xad14
+#define IMCR_L1DMPPA_BASE 0xae00
+#define IMCR_L2PDWAKE0	  0xc040
+#define IMCR_L2PDWAKE1	  0xc044
+#define IMCR_L2PDSLEEP0   0xc050
+#define IMCR_L2PDSLEEP1   0xc054
+#define IMCR_L2PDSTAT0	  0xc060
+#define IMCR_L2PDSTAT1	  0xc064
+
+/*
+ * CCFG register values and bits
+ */
+#define L2MODE_0K_CACHE   0x0
+#define L2MODE_32K_CACHE  0x1
+#define L2MODE_64K_CACHE  0x2
+#define L2MODE_128K_CACHE 0x3
+#define L2MODE_256K_CACHE 0x7
+
+#define L2PRIO_URGENT     0x0
+#define L2PRIO_HIGH       0x1
+#define L2PRIO_MEDIUM     0x2
+#define L2PRIO_LOW        0x3
+
+#define CCFG_ID           0x100   /* Invalidate L1P bit */
+#define CCFG_IP           0x200   /* Invalidate L1D bit */
+
+static void __iomem *cache_base;
+
+/*
+ * L1 & L2 caches generic functions
+ */
+#define imcr_get(reg) soc_readl(cache_base + (reg))
+#define imcr_set(reg, value) \
+do {								\
+	soc_writel((value), cache_base + (reg));		\
+	soc_readl(cache_base + (reg));				\
+} while (0)
+
+static void cache_block_operation_wait(unsigned int wc_reg)
+{
+	/* Wait for completion */
+	while (imcr_get(wc_reg))
+		cpu_relax();
+}
+
+static DEFINE_SPINLOCK(cache_lock);
+
+/*
+ * Generic function to perform a block cache operation as
+ * invalidate or writeback/invalidate
+ */
+static void cache_block_operation(unsigned int *start,
+				  unsigned int *end,
+				  unsigned int bar_reg,
+				  unsigned int wc_reg)
+{
+	unsigned long flags;
+	unsigned int wcnt =
+		(L2_CACHE_ALIGN_CNT((unsigned int) end)
+		 - L2_CACHE_ALIGN_LOW((unsigned int) start)) >> 2;
+	unsigned int wc = 0;
+
+	for (; wcnt; wcnt -= wc, start += wc) {
+loop:
+		spin_lock_irqsave(&cache_lock, flags);
+
+		/*
+		 * If another cache operation is occuring
+		 */
+		if (unlikely(imcr_get(wc_reg))) {
+			spin_unlock_irqrestore(&cache_lock, flags);
+
+			/* Wait for previous operation completion */
+			cache_block_operation_wait(wc_reg);
+
+			/* Try again */
+			goto loop;
+		}
+
+		imcr_set(bar_reg, L2_CACHE_ALIGN_LOW((unsigned int) start));
+
+		if (wcnt > 0xffff)
+			wc = 0xffff;
+		else
+			wc = wcnt;
+
+		/* Set word count value in the WC register */
+		imcr_set(wc_reg, wc & 0xffff);
+
+		spin_unlock_irqrestore(&cache_lock, flags);
+
+		/* Wait for completion */
+		cache_block_operation_wait(wc_reg);
+	}
+}
+
+static void cache_block_operation_nowait(unsigned int *start,
+					 unsigned int *end,
+					 unsigned int bar_reg,
+					 unsigned int wc_reg)
+{
+	unsigned long flags;
+	unsigned int wcnt =
+		(L2_CACHE_ALIGN_CNT((unsigned int) end)
+		 - L2_CACHE_ALIGN_LOW((unsigned int) start)) >> 2;
+	unsigned int wc = 0;
+
+	for (; wcnt; wcnt -= wc, start += wc) {
+
+		spin_lock_irqsave(&cache_lock, flags);
+
+		imcr_set(bar_reg, L2_CACHE_ALIGN_LOW((unsigned int) start));
+
+		if (wcnt > 0xffff)
+			wc = 0xffff;
+		else
+			wc = wcnt;
+
+		/* Set word count value in the WC register */
+		imcr_set(wc_reg, wc & 0xffff);
+
+		spin_unlock_irqrestore(&cache_lock, flags);
+
+		/* Don't wait for completion on last cache operation */
+		if (wcnt > 0xffff)
+			cache_block_operation_wait(wc_reg);
+	}
+}
+
+/*
+ * L1 caches management
+ */
+
+/*
+ * Disable L1 caches
+ */
+void L1_cache_off(void)
+{
+	unsigned int dummy;
+
+	imcr_set(IMCR_L1PCFG, 0);
+	dummy = imcr_get(IMCR_L1PCFG);
+
+	imcr_set(IMCR_L1DCFG, 0);
+	dummy = imcr_get(IMCR_L1DCFG);
+}
+
+/*
+ * Enable L1 caches
+ */
+void L1_cache_on(void)
+{
+	unsigned int dummy;
+
+	imcr_set(IMCR_L1PCFG, 7);
+	dummy = imcr_get(IMCR_L1PCFG);
+
+	imcr_set(IMCR_L1DCFG, 7);
+	dummy = imcr_get(IMCR_L1DCFG);
+}
+
+/*
+ *  L1P global-invalidate all
+ */
+void L1P_cache_global_invalidate(void)
+{
+	unsigned int set = 1;
+	imcr_set(IMCR_L1PINV, set);
+	while (imcr_get(IMCR_L1PINV) & 1)
+		cpu_relax();
+}
+
+/*
+ *  L1D global-invalidate all
+ *
+ * Warning: this operation causes all updated data in L1D to
+ * be discarded rather than written back to the lower levels of
+ * memory
+ */
+void L1D_cache_global_invalidate(void)
+{
+	unsigned int set = 1;
+	imcr_set(IMCR_L1DINV, set);
+	while (imcr_get(IMCR_L1DINV) & 1)
+		cpu_relax();
+}
+
+void L1D_cache_global_writeback(void)
+{
+	unsigned int set = 1;
+	imcr_set(IMCR_L1DWB, set);
+	while (imcr_get(IMCR_L1DWB) & 1)
+		cpu_relax();
+}
+
+void L1D_cache_global_writeback_invalidate(void)
+{
+	unsigned int set = 1;
+	imcr_set(IMCR_L1DWBINV, set);
+	while (imcr_get(IMCR_L1DWBINV) & 1)
+		cpu_relax();
+}
+
+/*
+ * L2 caches management
+ */
+
+/*
+ * Set L2 operation mode
+ */
+void L2_cache_set_mode(unsigned int mode)
+{
+	unsigned int ccfg = imcr_get(IMCR_CCFG);
+
+	/* Clear and set the L2MODE bits in CCFG */
+	ccfg &= ~7;
+	ccfg |= (mode & 7);
+	imcr_set(IMCR_CCFG, ccfg);
+	ccfg = imcr_get(IMCR_CCFG);
+}
+
+/*
+ *  L2 global-writeback and global-invalidate all
+ */
+void L2_cache_global_writeback_invalidate(void)
+{
+	imcr_set(IMCR_L2WBINV, 1);
+	while (imcr_get(IMCR_L2WBINV))
+		cpu_relax();
+}
+
+/*
+ *  L2 global-writeback all
+ */
+void L2_cache_global_writeback(void)
+{
+	imcr_set(IMCR_L2WB, 1);
+	while (imcr_get(IMCR_L2WB))
+		cpu_relax();
+}
+
+/*
+ * Cacheability controls
+ */
+void enable_caching(unsigned long start, unsigned long end)
+{
+	unsigned int mar = IMCR_MAR_BASE + ((start >> 24) << 2);
+	unsigned int mar_e = IMCR_MAR_BASE + ((end >> 24) << 2);
+
+	for (; mar <= mar_e; mar += 4)
+		imcr_set(mar, imcr_get(mar) | 1);
+}
+
+void disable_caching(unsigned long start, unsigned long end)
+{
+	unsigned int mar = IMCR_MAR_BASE + ((start >> 24) << 2);
+	unsigned int mar_e = IMCR_MAR_BASE + ((end >> 24) << 2);
+
+	for (; mar <= mar_e; mar += 4)
+		imcr_set(mar, imcr_get(mar) & ~1);
+}
+
+
+/*
+ *  L1 block operations
+ */
+void L1P_cache_block_invalidate(unsigned int start, unsigned int end)
+{
+	cache_block_operation((unsigned int *) start,
+			      (unsigned int *) end,
+			      IMCR_L1PIBAR, IMCR_L1PIWC);
+}
+EXPORT_SYMBOL(L1P_cache_block_invalidate);
+
+void L1D_cache_block_invalidate(unsigned int start, unsigned int end)
+{
+	cache_block_operation((unsigned int *) start,
+			      (unsigned int *) end,
+			      IMCR_L1DIBAR, IMCR_L1DIWC);
+}
+
+void L1D_cache_block_writeback_invalidate(unsigned int start, unsigned int end)
+{
+	cache_block_operation((unsigned int *) start,
+			      (unsigned int *) end,
+			      IMCR_L1DWIBAR, IMCR_L1DWIWC);
+}
+
+void L1D_cache_block_writeback(unsigned int start, unsigned int end)
+{
+	cache_block_operation((unsigned int *) start,
+			      (unsigned int *) end,
+			      IMCR_L1DWBAR, IMCR_L1DWWC);
+}
+EXPORT_SYMBOL(L1D_cache_block_writeback);
+
+/*
+ *  L2 block operations
+ */
+void L2_cache_block_invalidate(unsigned int start, unsigned int end)
+{
+	cache_block_operation((unsigned int *) start,
+			      (unsigned int *) end,
+			      IMCR_L2IBAR, IMCR_L2IWC);
+}
+
+void L2_cache_block_writeback(unsigned int start, unsigned int end)
+{
+	cache_block_operation((unsigned int *) start,
+			      (unsigned int *) end,
+			      IMCR_L2WBAR, IMCR_L2WWC);
+}
+
+void L2_cache_block_writeback_invalidate(unsigned int start, unsigned int end)
+{
+	cache_block_operation((unsigned int *) start,
+			      (unsigned int *) end,
+			      IMCR_L2WIBAR, IMCR_L2WIWC);
+}
+
+void L2_cache_block_invalidate_nowait(unsigned int start, unsigned int end)
+{
+	cache_block_operation_nowait((unsigned int *) start,
+				     (unsigned int *) end,
+				     IMCR_L2IBAR, IMCR_L2IWC);
+}
+
+void L2_cache_block_writeback_nowait(unsigned int start, unsigned int end)
+{
+	cache_block_operation_nowait((unsigned int *) start,
+				     (unsigned int *) end,
+				     IMCR_L2WBAR, IMCR_L2WWC);
+}
+
+void L2_cache_block_writeback_invalidate_nowait(unsigned int start,
+						unsigned int end)
+{
+	cache_block_operation_nowait((unsigned int *) start,
+				     (unsigned int *) end,
+				     IMCR_L2WIBAR, IMCR_L2WIWC);
+}
+
+
+/*
+ * L1 and L2 caches configuration
+ */
+void __init c6x_cache_init(void)
+{
+	struct device_node *node;
+
+	node = of_find_compatible_node(NULL, NULL, "ti,c64x+cache");
+	if (!node)
+		return;
+
+	cache_base = of_iomap(node, 0);
+
+	of_node_put(node);
+
+	if (!cache_base)
+		return;
+
+	/* Set L2 caches on the the whole L2 SRAM memory */
+	L2_cache_set_mode(L2MODE_SIZE);
+
+	/* Enable L1 */
+	L1_cache_on();
+}
diff --git a/kernel/arch/c6x/platforms/dscr.c b/kernel/arch/c6x/platforms/dscr.c
new file mode 100644
index 000000000..f848a65ee
--- /dev/null
+++ b/kernel/arch/c6x/platforms/dscr.c
@@ -0,0 +1,598 @@
+/*
+ *  Device State Control Registers driver
+ *
+ *  Copyright (C) 2011 Texas Instruments Incorporated
+ *  Author: Mark Salter <msalter@redhat.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.
+ */
+
+/*
+ * The Device State Control Registers (DSCR) provide SoC level control over
+ * a number of peripherals. Details vary considerably among the various SoC
+ * parts. In general, the DSCR block will provide one or more configuration
+ * registers often protected by a lock register. One or more key values must
+ * be written to a lock register in order to unlock the configuration register.
+ * The configuration register may be used to enable (and disable in some
+ * cases) SoC pin drivers, peripheral clock sources (internal or pin), etc.
+ * In some cases, a configuration register is write once or the individual
+ * bits are write once. That is, you may be able to enable a device, but
+ * will not be able to disable it.
+ *
+ * In addition to device configuration, the DSCR block may provide registers
+ * which are used to reset SoC peripherals, provide device ID information,
+ * provide MAC addresses, and other miscellaneous functions.
+ */
+
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <asm/soc.h>
+#include <asm/dscr.h>
+
+#define MAX_DEVSTATE_IDS   32
+#define MAX_DEVCTL_REGS     8
+#define MAX_DEVSTAT_REGS    8
+#define MAX_LOCKED_REGS     4
+#define MAX_SOC_EMACS       2
+
+struct rmii_reset_reg {
+	u32 reg;
+	u32 mask;
+};
+
+/*
+ * Some registerd may be locked. In order to write to these
+ * registers, the key value must first be written to the lockreg.
+ */
+struct locked_reg {
+	u32 reg;	/* offset from base */
+	u32 lockreg;	/* offset from base */
+	u32 key;	/* unlock key */
+};
+
+/*
+ * This describes a contiguous area of like control bits used to enable/disable
+ * SoC devices. Each controllable device is given an ID which is used by the
+ * individual device drivers to control the device state. These IDs start at
+ * zero and are assigned sequentially to the control bitfield ranges described
+ * by this structure.
+ */
+struct devstate_ctl_reg {
+	u32 reg;		/* register holding the control bits */
+	u8  start_id;		/* start id of this range */
+	u8  num_ids;		/* number of devices in this range */
+	u8  enable_only;	/* bits are write-once to enable only */
+	u8  enable;		/* value used to enable device */
+	u8  disable;		/* value used to disable device */
+	u8  shift;		/* starting (rightmost) bit in range */
+	u8  nbits;		/* number of bits per device */
+};
+
+
+/*
+ * This describes a region of status bits indicating the state of
+ * various devices. This is used internally to wait for status
+ * change completion when enabling/disabling a device. Status is
+ * optional and not all device controls will have a corresponding
+ * status.
+ */
+struct devstate_stat_reg {
+	u32 reg;		/* register holding the status bits */
+	u8  start_id;		/* start id of this range */
+	u8  num_ids;		/* number of devices in this range */
+	u8  enable;		/* value indicating enabled state */
+	u8  disable;		/* value indicating disabled state */
+	u8  shift;		/* starting (rightmost) bit in range */
+	u8  nbits;		/* number of bits per device */
+};
+
+struct devstate_info {
+	struct devstate_ctl_reg *ctl;
+	struct devstate_stat_reg *stat;
+};
+
+/* These are callbacks to SOC-specific code. */
+struct dscr_ops {
+	void (*init)(struct device_node *node);
+};
+
+struct dscr_regs {
+	spinlock_t		lock;
+	void __iomem		*base;
+	u32			kick_reg[2];
+	u32			kick_key[2];
+	struct locked_reg	locked[MAX_LOCKED_REGS];
+	struct devstate_info	devstate_info[MAX_DEVSTATE_IDS];
+	struct rmii_reset_reg   rmii_resets[MAX_SOC_EMACS];
+	struct devstate_ctl_reg devctl[MAX_DEVCTL_REGS];
+	struct devstate_stat_reg devstat[MAX_DEVSTAT_REGS];
+};
+
+static struct dscr_regs	dscr;
+
+static struct locked_reg *find_locked_reg(u32 reg)
+{
+	int i;
+
+	for (i = 0; i < MAX_LOCKED_REGS; i++)
+		if (dscr.locked[i].key && reg == dscr.locked[i].reg)
+			return &dscr.locked[i];
+	return NULL;
+}
+
+/*
+ * Write to a register with one lock
+ */
+static void dscr_write_locked1(u32 reg, u32 val,
+			       u32 lock, u32 key)
+{
+	void __iomem *reg_addr = dscr.base + reg;
+	void __iomem *lock_addr = dscr.base + lock;
+
+	/*
+	 * For some registers, the lock is relocked after a short number
+	 * of cycles. We have to put the lock write and register write in
+	 * the same fetch packet to meet this timing. The .align ensures
+	 * the two stw instructions are in the same fetch packet.
+	 */
+	asm volatile ("b	.s2	0f\n"
+		      "nop	5\n"
+		      "    .align 5\n"
+		      "0:\n"
+		      "stw	.D1T2	%3,*%2\n"
+		      "stw	.D1T2	%1,*%0\n"
+		      :
+		      : "a"(reg_addr), "b"(val), "a"(lock_addr), "b"(key)
+		);
+
+	/* in case the hw doesn't reset the lock */
+	soc_writel(0, lock_addr);
+}
+
+/*
+ * Write to a register protected by two lock registers
+ */
+static void dscr_write_locked2(u32 reg, u32 val,
+			       u32 lock0, u32 key0,
+			       u32 lock1, u32 key1)
+{
+	soc_writel(key0, dscr.base + lock0);
+	soc_writel(key1, dscr.base + lock1);
+	soc_writel(val, dscr.base + reg);
+	soc_writel(0, dscr.base + lock0);
+	soc_writel(0, dscr.base + lock1);
+}
+
+static void dscr_write(u32 reg, u32 val)
+{
+	struct locked_reg *lock;
+
+	lock = find_locked_reg(reg);
+	if (lock)
+		dscr_write_locked1(reg, val, lock->lockreg, lock->key);
+	else if (dscr.kick_key[0])
+		dscr_write_locked2(reg, val, dscr.kick_reg[0], dscr.kick_key[0],
+				   dscr.kick_reg[1], dscr.kick_key[1]);
+	else
+		soc_writel(val, dscr.base + reg);
+}
+
+
+/*
+ * Drivers can use this interface to enable/disable SoC IP blocks.
+ */
+void dscr_set_devstate(int id, enum dscr_devstate_t state)
+{
+	struct devstate_ctl_reg *ctl;
+	struct devstate_stat_reg *stat;
+	struct devstate_info *info;
+	u32 ctl_val, val;
+	int ctl_shift, ctl_mask;
+	unsigned long flags;
+
+	if (!dscr.base)
+		return;
+
+	if (id < 0 || id >= MAX_DEVSTATE_IDS)
+		return;
+
+	info = &dscr.devstate_info[id];
+	ctl = info->ctl;
+	stat = info->stat;
+
+	if (ctl == NULL)
+		return;
+
+	ctl_shift = ctl->shift + ctl->nbits * (id - ctl->start_id);
+	ctl_mask = ((1 << ctl->nbits) - 1) << ctl_shift;
+
+	switch (state) {
+	case DSCR_DEVSTATE_ENABLED:
+		ctl_val = ctl->enable << ctl_shift;
+		break;
+	case DSCR_DEVSTATE_DISABLED:
+		if (ctl->enable_only)
+			return;
+		ctl_val = ctl->disable << ctl_shift;
+		break;
+	default:
+		return;
+	}
+
+	spin_lock_irqsave(&dscr.lock, flags);
+
+	val = soc_readl(dscr.base + ctl->reg);
+	val &= ~ctl_mask;
+	val |= ctl_val;
+
+	dscr_write(ctl->reg, val);
+
+	spin_unlock_irqrestore(&dscr.lock, flags);
+
+	if (!stat)
+		return;
+
+	ctl_shift = stat->shift + stat->nbits * (id - stat->start_id);
+
+	if (state == DSCR_DEVSTATE_ENABLED)
+		ctl_val = stat->enable;
+	else
+		ctl_val = stat->disable;
+
+	do {
+		val = soc_readl(dscr.base + stat->reg);
+		val >>= ctl_shift;
+		val &= ((1 << stat->nbits) - 1);
+	} while (val != ctl_val);
+}
+EXPORT_SYMBOL(dscr_set_devstate);
+
+/*
+ * Drivers can use this to reset RMII module.
+ */
+void dscr_rmii_reset(int id, int assert)
+{
+	struct rmii_reset_reg *r;
+	unsigned long flags;
+	u32 val;
+
+	if (id < 0 || id >= MAX_SOC_EMACS)
+		return;
+
+	r = &dscr.rmii_resets[id];
+	if (r->mask == 0)
+		return;
+
+	spin_lock_irqsave(&dscr.lock, flags);
+
+	val = soc_readl(dscr.base + r->reg);
+	if (assert)
+		dscr_write(r->reg, val | r->mask);
+	else
+		dscr_write(r->reg, val & ~(r->mask));
+
+	spin_unlock_irqrestore(&dscr.lock, flags);
+}
+EXPORT_SYMBOL(dscr_rmii_reset);
+
+static void __init dscr_parse_devstat(struct device_node *node,
+				      void __iomem *base)
+{
+	u32 val;
+	int err;
+
+	err = of_property_read_u32_array(node, "ti,dscr-devstat", &val, 1);
+	if (!err)
+		c6x_devstat = soc_readl(base + val);
+	printk(KERN_INFO "DEVSTAT: %08x\n", c6x_devstat);
+}
+
+static void __init dscr_parse_silicon_rev(struct device_node *node,
+					 void __iomem *base)
+{
+	u32 vals[3];
+	int err;
+
+	err = of_property_read_u32_array(node, "ti,dscr-silicon-rev", vals, 3);
+	if (!err) {
+		c6x_silicon_rev = soc_readl(base + vals[0]);
+		c6x_silicon_rev >>= vals[1];
+		c6x_silicon_rev &= vals[2];
+	}
+}
+
+/*
+ * Some SoCs will have a pair of fuse registers which hold
+ * an ethernet MAC address. The "ti,dscr-mac-fuse-regs"
+ * property is a mapping from fuse register bytes to MAC
+ * address bytes. The expected format is:
+ *
+ *	ti,dscr-mac-fuse-regs = <reg0 b3 b2 b1 b0
+ *				 reg1 b3 b2 b1 b0>
+ *
+ * reg0 and reg1 are the offsets of the two fuse registers.
+ * b3-b0 positionally represent bytes within the fuse register.
+ * b3 is the most significant byte and b0 is the least.
+ * Allowable values for b3-b0 are:
+ *
+ *	  0 = fuse register byte not used in MAC address
+ *      1-6 = index+1 into c6x_fuse_mac[]
+ */
+static void __init dscr_parse_mac_fuse(struct device_node *node,
+				       void __iomem *base)
+{
+	u32 vals[10], fuse;
+	int f, i, j, err;
+
+	err = of_property_read_u32_array(node, "ti,dscr-mac-fuse-regs",
+					 vals, 10);
+	if (err)
+		return;
+
+	for (f = 0; f < 2; f++) {
+		fuse = soc_readl(base + vals[f * 5]);
+		for (j = (f * 5) + 1, i = 24; i >= 0; i -= 8, j++)
+			if (vals[j] && vals[j] <= 6)
+				c6x_fuse_mac[vals[j] - 1] = fuse >> i;
+	}
+}
+
+static void __init dscr_parse_rmii_resets(struct device_node *node,
+					  void __iomem *base)
+{
+	const __be32 *p;
+	int i, size;
+
+	/* look for RMII reset registers */
+	p = of_get_property(node, "ti,dscr-rmii-resets", &size);
+	if (p) {
+		/* parse all the reg/mask pairs we can handle */
+		size /= (sizeof(*p) * 2);
+		if (size > MAX_SOC_EMACS)
+			size = MAX_SOC_EMACS;
+
+		for (i = 0; i < size; i++) {
+			dscr.rmii_resets[i].reg = be32_to_cpup(p++);
+			dscr.rmii_resets[i].mask = be32_to_cpup(p++);
+		}
+	}
+}
+
+
+static void __init dscr_parse_privperm(struct device_node *node,
+				       void __iomem *base)
+{
+	u32 vals[2];
+	int err;
+
+	err = of_property_read_u32_array(node, "ti,dscr-privperm", vals, 2);
+	if (err)
+		return;
+	dscr_write(vals[0], vals[1]);
+}
+
+/*
+ * SoCs may have "locked" DSCR registers which can only be written
+ * to only after writing a key value to a lock registers. These
+ * regisers can be described with the "ti,dscr-locked-regs" property.
+ * This property provides a list of register descriptions with each
+ * description consisting of three values.
+ *
+ *	ti,dscr-locked-regs = <reg0 lockreg0 key0
+ *                               ...
+ *                             regN lockregN keyN>;
+ *
+ * reg is the offset of the locked register
+ * lockreg is the offset of the lock register
+ * key is the unlock key written to lockreg
+ *
+ */
+static void __init dscr_parse_locked_regs(struct device_node *node,
+					  void __iomem *base)
+{
+	struct locked_reg *r;
+	const __be32 *p;
+	int i, size;
+
+	p = of_get_property(node, "ti,dscr-locked-regs", &size);
+	if (p) {
+		/* parse all the register descriptions we can handle */
+		size /= (sizeof(*p) * 3);
+		if (size > MAX_LOCKED_REGS)
+			size = MAX_LOCKED_REGS;
+
+		for (i = 0; i < size; i++) {
+			r = &dscr.locked[i];
+
+			r->reg = be32_to_cpup(p++);
+			r->lockreg = be32_to_cpup(p++);
+			r->key = be32_to_cpup(p++);
+		}
+	}
+}
+
+/*
+ * SoCs may have DSCR registers which are only write enabled after
+ * writing specific key values to two registers. The two key registers
+ * and the key values can be parsed from a "ti,dscr-kick-regs"
+ * propety with the following layout:
+ *
+ *	ti,dscr-kick-regs = <kickreg0 key0 kickreg1 key1>
+ *
+ * kickreg is the offset of the "kick" register
+ * key is the value which unlocks writing for protected regs
+ */
+static void __init dscr_parse_kick_regs(struct device_node *node,
+					void __iomem *base)
+{
+	u32 vals[4];
+	int err;
+
+	err = of_property_read_u32_array(node, "ti,dscr-kick-regs", vals, 4);
+	if (!err) {
+		dscr.kick_reg[0] = vals[0];
+		dscr.kick_key[0] = vals[1];
+		dscr.kick_reg[1] = vals[2];
+		dscr.kick_key[1] = vals[3];
+	}
+}
+
+
+/*
+ * SoCs may provide controls to enable/disable individual IP blocks. These
+ * controls in the DSCR usually control pin drivers but also may control
+ * clocking and or resets. The device tree is used to describe the bitfields
+ * in registers used to control device state. The number of bits and their
+ * values may vary even within the same register.
+ *
+ * The layout of these bitfields is described by the ti,dscr-devstate-ctl-regs
+ * property. This property is a list where each element describes a contiguous
+ * range of control fields with like properties. Each element of the list
+ * consists of 7 cells with the following values:
+ *
+ *   start_id num_ids reg enable disable start_bit nbits
+ *
+ * start_id is device id for the first device control in the range
+ * num_ids is the number of device controls in the range
+ * reg is the offset of the register holding the control bits
+ * enable is the value to enable a device
+ * disable is the value to disable a device (0xffffffff if cannot disable)
+ * start_bit is the bit number of the first bit in the range
+ * nbits is the number of bits per device control
+ */
+static void __init dscr_parse_devstate_ctl_regs(struct device_node *node,
+						void __iomem *base)
+{
+	struct devstate_ctl_reg *r;
+	const __be32 *p;
+	int i, j, size;
+
+	p = of_get_property(node, "ti,dscr-devstate-ctl-regs", &size);
+	if (p) {
+		/* parse all the ranges we can handle */
+		size /= (sizeof(*p) * 7);
+		if (size > MAX_DEVCTL_REGS)
+			size = MAX_DEVCTL_REGS;
+
+		for (i = 0; i < size; i++) {
+			r = &dscr.devctl[i];
+
+			r->start_id = be32_to_cpup(p++);
+			r->num_ids = be32_to_cpup(p++);
+			r->reg = be32_to_cpup(p++);
+			r->enable = be32_to_cpup(p++);
+			r->disable = be32_to_cpup(p++);
+			if (r->disable == 0xffffffff)
+				r->enable_only = 1;
+			r->shift = be32_to_cpup(p++);
+			r->nbits = be32_to_cpup(p++);
+
+			for (j = r->start_id;
+			     j < (r->start_id + r->num_ids);
+			     j++)
+				dscr.devstate_info[j].ctl = r;
+		}
+	}
+}
+
+/*
+ * SoCs may provide status registers indicating the state (enabled/disabled) of
+ * devices on the SoC. The device tree is used to describe the bitfields in
+ * registers used to provide device status. The number of bits and their
+ * values used to provide status may vary even within the same register.
+ *
+ * The layout of these bitfields is described by the ti,dscr-devstate-stat-regs
+ * property. This property is a list where each element describes a contiguous
+ * range of status fields with like properties. Each element of the list
+ * consists of 7 cells with the following values:
+ *
+ *   start_id num_ids reg enable disable start_bit nbits
+ *
+ * start_id is device id for the first device status in the range
+ * num_ids is the number of devices covered by the range
+ * reg is the offset of the register holding the status bits
+ * enable is the value indicating device is enabled
+ * disable is the value indicating device is disabled
+ * start_bit is the bit number of the first bit in the range
+ * nbits is the number of bits per device status
+ */
+static void __init dscr_parse_devstate_stat_regs(struct device_node *node,
+						 void __iomem *base)
+{
+	struct devstate_stat_reg *r;
+	const __be32 *p;
+	int i, j, size;
+
+	p = of_get_property(node, "ti,dscr-devstate-stat-regs", &size);
+	if (p) {
+		/* parse all the ranges we can handle */
+		size /= (sizeof(*p) * 7);
+		if (size > MAX_DEVSTAT_REGS)
+			size = MAX_DEVSTAT_REGS;
+
+		for (i = 0; i < size; i++) {
+			r = &dscr.devstat[i];
+
+			r->start_id = be32_to_cpup(p++);
+			r->num_ids = be32_to_cpup(p++);
+			r->reg = be32_to_cpup(p++);
+			r->enable = be32_to_cpup(p++);
+			r->disable = be32_to_cpup(p++);
+			r->shift = be32_to_cpup(p++);
+			r->nbits = be32_to_cpup(p++);
+
+			for (j = r->start_id;
+			     j < (r->start_id + r->num_ids);
+			     j++)
+				dscr.devstate_info[j].stat = r;
+		}
+	}
+}
+
+static struct of_device_id dscr_ids[] __initdata = {
+	{ .compatible = "ti,c64x+dscr" },
+	{}
+};
+
+/*
+ * Probe for DSCR area.
+ *
+ * This has to be done early on in case timer or interrupt controller
+ * needs something. e.g. On C6455 SoC, timer must be enabled through
+ * DSCR before it is functional.
+ */
+void __init dscr_probe(void)
+{
+	struct device_node *node;
+	void __iomem *base;
+
+	spin_lock_init(&dscr.lock);
+
+	node = of_find_matching_node(NULL, dscr_ids);
+	if (!node)
+		return;
+
+	base = of_iomap(node, 0);
+	if (!base) {
+		of_node_put(node);
+		return;
+	}
+
+	dscr.base = base;
+
+	dscr_parse_devstat(node, base);
+	dscr_parse_silicon_rev(node, base);
+	dscr_parse_mac_fuse(node, base);
+	dscr_parse_rmii_resets(node, base);
+	dscr_parse_locked_regs(node, base);
+	dscr_parse_kick_regs(node, base);
+	dscr_parse_devstate_ctl_regs(node, base);
+	dscr_parse_devstate_stat_regs(node, base);
+	dscr_parse_privperm(node, base);
+}
diff --git a/kernel/arch/c6x/platforms/emif.c b/kernel/arch/c6x/platforms/emif.c
new file mode 100644
index 000000000..8b564dec2
--- /dev/null
+++ b/kernel/arch/c6x/platforms/emif.c
@@ -0,0 +1,87 @@
+/*
+ *  External Memory Interface
+ *
+ *  Copyright (C) 2011 Texas Instruments Incorporated
+ *  Author: Mark Salter <msalter@redhat.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.
+ */
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#include <asm/soc.h>
+#include <asm/dscr.h>
+
+#define NUM_EMIFA_CHIP_ENABLES 4
+
+struct emifa_regs {
+	u32	midr;
+	u32	stat;
+	u32	reserved1[6];
+	u32	bprio;
+	u32	reserved2[23];
+	u32	cecfg[NUM_EMIFA_CHIP_ENABLES];
+	u32	reserved3[4];
+	u32	awcc;
+	u32	reserved4[7];
+	u32	intraw;
+	u32	intmsk;
+	u32	intmskset;
+	u32	intmskclr;
+};
+
+static struct of_device_id emifa_match[] __initdata = {
+	{ .compatible = "ti,c64x+emifa"	},
+	{}
+};
+
+/*
+ * Parse device tree for existence of an EMIF (External Memory Interface)
+ * and initialize it if found.
+ */
+static int __init c6x_emifa_init(void)
+{
+	struct emifa_regs __iomem *regs;
+	struct device_node *node;
+	const __be32 *p;
+	u32 val;
+	int i, len, err;
+
+	node = of_find_matching_node(NULL, emifa_match);
+	if (!node)
+		return 0;
+
+	regs = of_iomap(node, 0);
+	if (!regs)
+		return 0;
+
+	/* look for a dscr-based enable for emifa pin buffers */
+	err = of_property_read_u32_array(node, "ti,dscr-dev-enable", &val, 1);
+	if (!err)
+		dscr_set_devstate(val, DSCR_DEVSTATE_ENABLED);
+
+	/* set up the chip enables */
+	p = of_get_property(node, "ti,emifa-ce-config", &len);
+	if (p) {
+		len /= sizeof(u32);
+		if (len > NUM_EMIFA_CHIP_ENABLES)
+			len = NUM_EMIFA_CHIP_ENABLES;
+		for (i = 0; i <= len; i++)
+			soc_writel(be32_to_cpup(&p[i]), &regs->cecfg[i]);
+	}
+
+	err = of_property_read_u32_array(node, "ti,emifa-burst-priority", &val, 1);
+	if (!err)
+		soc_writel(val, &regs->bprio);
+
+	err = of_property_read_u32_array(node, "ti,emifa-async-wait-control", &val, 1);
+	if (!err)
+		soc_writel(val, &regs->awcc);
+
+	iounmap(regs);
+	of_node_put(node);
+	return 0;
+}
+pure_initcall(c6x_emifa_init);
diff --git a/kernel/arch/c6x/platforms/megamod-pic.c b/kernel/arch/c6x/platforms/megamod-pic.c
new file mode 100644
index 000000000..74e3371eb
--- /dev/null
+++ b/kernel/arch/c6x/platforms/megamod-pic.c
@@ -0,0 +1,346 @@
+/*
+ *  Support for C64x+ Megamodule Interrupt Controller
+ *
+ *  Copyright (C) 2010, 2011 Texas Instruments Incorporated
+ *  Contributed by: Mark Salter <msalter@redhat.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.
+ */
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <asm/soc.h>
+#include <asm/megamod-pic.h>
+
+#define NR_COMBINERS	4
+#define NR_MUX_OUTPUTS  12
+
+#define IRQ_UNMAPPED 0xffff
+
+/*
+ * Megamodule Interrupt Controller register layout
+ */
+struct megamod_regs {
+	u32	evtflag[8];
+	u32	evtset[8];
+	u32	evtclr[8];
+	u32	reserved0[8];
+	u32	evtmask[8];
+	u32	mevtflag[8];
+	u32	expmask[8];
+	u32	mexpflag[8];
+	u32	intmux_unused;
+	u32	intmux[7];
+	u32	reserved1[8];
+	u32	aegmux[2];
+	u32	reserved2[14];
+	u32	intxstat;
+	u32	intxclr;
+	u32	intdmask;
+	u32	reserved3[13];
+	u32	evtasrt;
+};
+
+struct megamod_pic {
+	struct irq_domain *irqhost;
+	struct megamod_regs __iomem *regs;
+	raw_spinlock_t lock;
+
+	/* hw mux mapping */
+	unsigned int output_to_irq[NR_MUX_OUTPUTS];
+};
+
+static struct megamod_pic *mm_pic;
+
+struct megamod_cascade_data {
+	struct megamod_pic *pic;
+	int index;
+};
+
+static struct megamod_cascade_data cascade_data[NR_COMBINERS];
+
+static void mask_megamod(struct irq_data *data)
+{
+	struct megamod_pic *pic = irq_data_get_irq_chip_data(data);
+	irq_hw_number_t src = irqd_to_hwirq(data);
+	u32 __iomem *evtmask = &pic->regs->evtmask[src / 32];
+
+	raw_spin_lock(&pic->lock);
+	soc_writel(soc_readl(evtmask) | (1 << (src & 31)), evtmask);
+	raw_spin_unlock(&pic->lock);
+}
+
+static void unmask_megamod(struct irq_data *data)
+{
+	struct megamod_pic *pic = irq_data_get_irq_chip_data(data);
+	irq_hw_number_t src = irqd_to_hwirq(data);
+	u32 __iomem *evtmask = &pic->regs->evtmask[src / 32];
+
+	raw_spin_lock(&pic->lock);
+	soc_writel(soc_readl(evtmask) & ~(1 << (src & 31)), evtmask);
+	raw_spin_unlock(&pic->lock);
+}
+
+static struct irq_chip megamod_chip = {
+	.name		= "megamod",
+	.irq_mask	= mask_megamod,
+	.irq_unmask	= unmask_megamod,
+};
+
+static void megamod_irq_cascade(unsigned int irq, struct irq_desc *desc)
+{
+	struct megamod_cascade_data *cascade;
+	struct megamod_pic *pic;
+	u32 events;
+	int n, idx;
+
+	cascade = irq_desc_get_handler_data(desc);
+
+	pic = cascade->pic;
+	idx = cascade->index;
+
+	while ((events = soc_readl(&pic->regs->mevtflag[idx])) != 0) {
+		n = __ffs(events);
+
+		irq = irq_linear_revmap(pic->irqhost, idx * 32 + n);
+
+		soc_writel(1 << n, &pic->regs->evtclr[idx]);
+
+		generic_handle_irq(irq);
+	}
+}
+
+static int megamod_map(struct irq_domain *h, unsigned int virq,
+		       irq_hw_number_t hw)
+{
+	struct megamod_pic *pic = h->host_data;
+	int i;
+
+	/* We shouldn't see a hwirq which is muxed to core controller */
+	for (i = 0; i < NR_MUX_OUTPUTS; i++)
+		if (pic->output_to_irq[i] == hw)
+			return -1;
+
+	irq_set_chip_data(virq, pic);
+	irq_set_chip_and_handler(virq, &megamod_chip, handle_level_irq);
+
+	/* Set default irq type */
+	irq_set_irq_type(virq, IRQ_TYPE_NONE);
+
+	return 0;
+}
+
+static const struct irq_domain_ops megamod_domain_ops = {
+	.map	= megamod_map,
+	.xlate	= irq_domain_xlate_onecell,
+};
+
+static void __init set_megamod_mux(struct megamod_pic *pic, int src, int output)
+{
+	int index, offset;
+	u32 val;
+
+	if (src < 0 || src >= (NR_COMBINERS * 32)) {
+		pic->output_to_irq[output] = IRQ_UNMAPPED;
+		return;
+	}
+
+	/* four mappings per mux register */
+	index = output / 4;
+	offset = (output & 3) * 8;
+
+	val = soc_readl(&pic->regs->intmux[index]);
+	val &= ~(0xff << offset);
+	val |= src << offset;
+	soc_writel(val, &pic->regs->intmux[index]);
+}
+
+/*
+ * Parse the MUX mapping, if one exists.
+ *
+ * The MUX map is an array of up to 12 cells; one for each usable core priority
+ * interrupt. The value of a given cell is the megamodule interrupt source
+ * which is to me MUXed to the output corresponding to the cell position
+ * withing the array. The first cell in the array corresponds to priority
+ * 4 and the last (12th) cell corresponds to priority 15. The allowed
+ * values are 4 - ((NR_COMBINERS * 32) - 1). Note that the combined interrupt
+ * sources (0 - 3) are not allowed to be mapped through this property. They
+ * are handled through the "interrupts" property. This allows us to use a
+ * value of zero as a "do not map" placeholder.
+ */
+static void __init parse_priority_map(struct megamod_pic *pic,
+				      int *mapping, int size)
+{
+	struct device_node *np = pic->irqhost->of_node;
+	const __be32 *map;
+	int i, maplen;
+	u32 val;
+
+	map = of_get_property(np, "ti,c64x+megamod-pic-mux", &maplen);
+	if (map) {
+		maplen /= 4;
+		if (maplen > size)
+			maplen = size;
+
+		for (i = 0; i < maplen; i++) {
+			val = be32_to_cpup(map);
+			if (val && val >= 4)
+				mapping[i] = val;
+			++map;
+		}
+	}
+}
+
+static struct megamod_pic * __init init_megamod_pic(struct device_node *np)
+{
+	struct megamod_pic *pic;
+	int i, irq;
+	int mapping[NR_MUX_OUTPUTS];
+
+	pr_info("Initializing C64x+ Megamodule PIC\n");
+
+	pic = kzalloc(sizeof(struct megamod_pic), GFP_KERNEL);
+	if (!pic) {
+		pr_err("%s: Could not alloc PIC structure.\n", np->full_name);
+		return NULL;
+	}
+
+	pic->irqhost = irq_domain_add_linear(np, NR_COMBINERS * 32,
+					     &megamod_domain_ops, pic);
+	if (!pic->irqhost) {
+		pr_err("%s: Could not alloc host.\n", np->full_name);
+		goto error_free;
+	}
+
+	pic->irqhost->host_data = pic;
+
+	raw_spin_lock_init(&pic->lock);
+
+	pic->regs = of_iomap(np, 0);
+	if (!pic->regs) {
+		pr_err("%s: Could not map registers.\n", np->full_name);
+		goto error_free;
+	}
+
+	/* Initialize MUX map */
+	for (i = 0; i < ARRAY_SIZE(mapping); i++)
+		mapping[i] = IRQ_UNMAPPED;
+
+	parse_priority_map(pic, mapping, ARRAY_SIZE(mapping));
+
+	/*
+	 * We can have up to 12 interrupts cascading to the core controller.
+	 * These cascades can be from the combined interrupt sources or for
+	 * individual interrupt sources. The "interrupts" property only
+	 * deals with the cascaded combined interrupts. The individual
+	 * interrupts muxed to the core controller use the core controller
+	 * as their interrupt parent.
+	 */
+	for (i = 0; i < NR_COMBINERS; i++) {
+		struct irq_data *irq_data;
+		irq_hw_number_t hwirq;
+
+		irq = irq_of_parse_and_map(np, i);
+		if (irq == NO_IRQ)
+			continue;
+
+		irq_data = irq_get_irq_data(irq);
+		if (!irq_data) {
+			pr_err("%s: combiner-%d no irq_data for virq %d!\n",
+			       np->full_name, i, irq);
+			continue;
+		}
+
+		hwirq = irq_data->hwirq;
+
+		/*
+		 * Check that device tree provided something in the range
+		 * of the core priority interrupts (4 - 15).
+		 */
+		if (hwirq < 4 || hwirq >= NR_PRIORITY_IRQS) {
+			pr_err("%s: combiner-%d core irq %ld out of range!\n",
+			       np->full_name, i, hwirq);
+			continue;
+		}
+
+		/* record the mapping */
+		mapping[hwirq - 4] = i;
+
+		pr_debug("%s: combiner-%d cascading to hwirq %ld\n",
+			 np->full_name, i, hwirq);
+
+		cascade_data[i].pic = pic;
+		cascade_data[i].index = i;
+
+		/* mask and clear all events in combiner */
+		soc_writel(~0, &pic->regs->evtmask[i]);
+		soc_writel(~0, &pic->regs->evtclr[i]);
+
+		irq_set_handler_data(irq, &cascade_data[i]);
+		irq_set_chained_handler(irq, megamod_irq_cascade);
+	}
+
+	/* Finally, set up the MUX registers */
+	for (i = 0; i < NR_MUX_OUTPUTS; i++) {
+		if (mapping[i] != IRQ_UNMAPPED) {
+			pr_debug("%s: setting mux %d to priority %d\n",
+				 np->full_name, mapping[i], i + 4);
+			set_megamod_mux(pic, mapping[i], i);
+		}
+	}
+
+	return pic;
+
+error_free:
+	kfree(pic);
+
+	return NULL;
+}
+
+/*
+ * Return next active event after ACK'ing it.
+ * Return -1 if no events active.
+ */
+static int get_exception(void)
+{
+	int i, bit;
+	u32 mask;
+
+	for (i = 0; i < NR_COMBINERS; i++) {
+		mask = soc_readl(&mm_pic->regs->mexpflag[i]);
+		if (mask) {
+			bit = __ffs(mask);
+			soc_writel(1 << bit, &mm_pic->regs->evtclr[i]);
+			return (i * 32) + bit;
+		}
+	}
+	return -1;
+}
+
+static void assert_event(unsigned int val)
+{
+	soc_writel(val, &mm_pic->regs->evtasrt);
+}
+
+void __init megamod_pic_init(void)
+{
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "ti,c64x+megamod-pic");
+	if (!np)
+		return;
+
+	mm_pic = init_megamod_pic(np);
+	of_node_put(np);
+
+	soc_ops.get_exception = get_exception;
+	soc_ops.assert_event = assert_event;
+
+	return;
+}
diff --git a/kernel/arch/c6x/platforms/platform.c b/kernel/arch/c6x/platforms/platform.c
new file mode 100644
index 000000000..26c1a355d
--- /dev/null
+++ b/kernel/arch/c6x/platforms/platform.c
@@ -0,0 +1,17 @@
+/*
+ * Copyright 2011 Texas Instruments Incorporated
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/init.h>
+#include <linux/of_platform.h>
+
+static int __init c6x_device_probe(void)
+{
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+	return 0;
+}
+core_initcall(c6x_device_probe);
diff --git a/kernel/arch/c6x/platforms/pll.c b/kernel/arch/c6x/platforms/pll.c
new file mode 100644
index 000000000..3aa898f7c
--- /dev/null
+++ b/kernel/arch/c6x/platforms/pll.c
@@ -0,0 +1,444 @@
+/*
+ * Clock and PLL control for C64x+ devices
+ *
+ * Copyright (C) 2010, 2011 Texas Instruments.
+ * Contributed by: Mark Salter <msalter@redhat.com>
+ *
+ * Copied heavily from arm/mach-davinci/clock.c, so:
+ *
+ * Copyright (C) 2006-2007 Texas Instruments.
+ * Copyright (C) 2008-2009 Deep Root Systems, LLC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/clkdev.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/err.h>
+
+#include <asm/clock.h>
+#include <asm/soc.h>
+
+static LIST_HEAD(clocks);
+static DEFINE_MUTEX(clocks_mutex);
+static DEFINE_SPINLOCK(clockfw_lock);
+
+static void __clk_enable(struct clk *clk)
+{
+	if (clk->parent)
+		__clk_enable(clk->parent);
+	clk->usecount++;
+}
+
+static void __clk_disable(struct clk *clk)
+{
+	if (WARN_ON(clk->usecount == 0))
+		return;
+	--clk->usecount;
+
+	if (clk->parent)
+		__clk_disable(clk->parent);
+}
+
+int clk_enable(struct clk *clk)
+{
+	unsigned long flags;
+
+	if (clk == NULL || IS_ERR(clk))
+		return -EINVAL;
+
+	spin_lock_irqsave(&clockfw_lock, flags);
+	__clk_enable(clk);
+	spin_unlock_irqrestore(&clockfw_lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+	unsigned long flags;
+
+	if (clk == NULL || IS_ERR(clk))
+		return;
+
+	spin_lock_irqsave(&clockfw_lock, flags);
+	__clk_disable(clk);
+	spin_unlock_irqrestore(&clockfw_lock, flags);
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+	if (clk == NULL || IS_ERR(clk))
+		return -EINVAL;
+
+	return clk->rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+long clk_round_rate(struct clk *clk, unsigned long rate)
+{
+	if (clk == NULL || IS_ERR(clk))
+		return -EINVAL;
+
+	if (clk->round_rate)
+		return clk->round_rate(clk, rate);
+
+	return clk->rate;
+}
+EXPORT_SYMBOL(clk_round_rate);
+
+/* Propagate rate to children */
+static void propagate_rate(struct clk *root)
+{
+	struct clk *clk;
+
+	list_for_each_entry(clk, &root->children, childnode) {
+		if (clk->recalc)
+			clk->rate = clk->recalc(clk);
+		propagate_rate(clk);
+	}
+}
+
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+	unsigned long flags;
+	int ret = -EINVAL;
+
+	if (clk == NULL || IS_ERR(clk))
+		return ret;
+
+	if (clk->set_rate)
+		ret = clk->set_rate(clk, rate);
+
+	spin_lock_irqsave(&clockfw_lock, flags);
+	if (ret == 0) {
+		if (clk->recalc)
+			clk->rate = clk->recalc(clk);
+		propagate_rate(clk);
+	}
+	spin_unlock_irqrestore(&clockfw_lock, flags);
+
+	return ret;
+}
+EXPORT_SYMBOL(clk_set_rate);
+
+int clk_set_parent(struct clk *clk, struct clk *parent)
+{
+	unsigned long flags;
+
+	if (clk == NULL || IS_ERR(clk))
+		return -EINVAL;
+
+	/* Cannot change parent on enabled clock */
+	if (WARN_ON(clk->usecount))
+		return -EINVAL;
+
+	mutex_lock(&clocks_mutex);
+	clk->parent = parent;
+	list_del_init(&clk->childnode);
+	list_add(&clk->childnode, &clk->parent->children);
+	mutex_unlock(&clocks_mutex);
+
+	spin_lock_irqsave(&clockfw_lock, flags);
+	if (clk->recalc)
+		clk->rate = clk->recalc(clk);
+	propagate_rate(clk);
+	spin_unlock_irqrestore(&clockfw_lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL(clk_set_parent);
+
+int clk_register(struct clk *clk)
+{
+	if (clk == NULL || IS_ERR(clk))
+		return -EINVAL;
+
+	if (WARN(clk->parent && !clk->parent->rate,
+		 "CLK: %s parent %s has no rate!\n",
+		 clk->name, clk->parent->name))
+		return -EINVAL;
+
+	mutex_lock(&clocks_mutex);
+	list_add_tail(&clk->node, &clocks);
+	if (clk->parent)
+		list_add_tail(&clk->childnode, &clk->parent->children);
+	mutex_unlock(&clocks_mutex);
+
+	/* If rate is already set, use it */
+	if (clk->rate)
+		return 0;
+
+	/* Else, see if there is a way to calculate it */
+	if (clk->recalc)
+		clk->rate = clk->recalc(clk);
+
+	/* Otherwise, default to parent rate */
+	else if (clk->parent)
+		clk->rate = clk->parent->rate;
+
+	return 0;
+}
+EXPORT_SYMBOL(clk_register);
+
+void clk_unregister(struct clk *clk)
+{
+	if (clk == NULL || IS_ERR(clk))
+		return;
+
+	mutex_lock(&clocks_mutex);
+	list_del(&clk->node);
+	list_del(&clk->childnode);
+	mutex_unlock(&clocks_mutex);
+}
+EXPORT_SYMBOL(clk_unregister);
+
+
+static u32 pll_read(struct pll_data *pll, int reg)
+{
+	return soc_readl(pll->base + reg);
+}
+
+static unsigned long clk_sysclk_recalc(struct clk *clk)
+{
+	u32 v, plldiv = 0;
+	struct pll_data *pll;
+	unsigned long rate = clk->rate;
+
+	if (WARN_ON(!clk->parent))
+		return rate;
+
+	rate = clk->parent->rate;
+
+	/* the parent must be a PLL */
+	if (WARN_ON(!clk->parent->pll_data))
+		return rate;
+
+	pll = clk->parent->pll_data;
+
+	/* If pre-PLL, source clock is before the multiplier and divider(s) */
+	if (clk->flags & PRE_PLL)
+		rate = pll->input_rate;
+
+	if (!clk->div) {
+		pr_debug("%s: (no divider) rate = %lu KHz\n",
+			 clk->name, rate / 1000);
+		return rate;
+	}
+
+	if (clk->flags & FIXED_DIV_PLL) {
+		rate /= clk->div;
+		pr_debug("%s: (fixed divide by %d) rate = %lu KHz\n",
+			 clk->name, clk->div, rate / 1000);
+		return rate;
+	}
+
+	v = pll_read(pll, clk->div);
+	if (v & PLLDIV_EN)
+		plldiv = (v & PLLDIV_RATIO_MASK) + 1;
+
+	if (plldiv == 0)
+		plldiv = 1;
+
+	rate /= plldiv;
+
+	pr_debug("%s: (divide by %d) rate = %lu KHz\n",
+		 clk->name, plldiv, rate / 1000);
+
+	return rate;
+}
+
+static unsigned long clk_leafclk_recalc(struct clk *clk)
+{
+	if (WARN_ON(!clk->parent))
+		return clk->rate;
+
+	pr_debug("%s: (parent %s) rate = %lu KHz\n",
+		 clk->name, clk->parent->name,	clk->parent->rate / 1000);
+
+	return clk->parent->rate;
+}
+
+static unsigned long clk_pllclk_recalc(struct clk *clk)
+{
+	u32 ctrl, mult = 0, prediv = 0, postdiv = 0;
+	u8 bypass;
+	struct pll_data *pll = clk->pll_data;
+	unsigned long rate = clk->rate;
+
+	if (clk->flags & FIXED_RATE_PLL)
+		return rate;
+
+	ctrl = pll_read(pll, PLLCTL);
+	rate = pll->input_rate = clk->parent->rate;
+
+	if (ctrl & PLLCTL_PLLEN)
+		bypass = 0;
+	else
+		bypass = 1;
+
+	if (pll->flags & PLL_HAS_MUL) {
+		mult = pll_read(pll, PLLM);
+		mult = (mult & PLLM_PLLM_MASK) + 1;
+	}
+	if (pll->flags & PLL_HAS_PRE) {
+		prediv = pll_read(pll, PLLPRE);
+		if (prediv & PLLDIV_EN)
+			prediv = (prediv & PLLDIV_RATIO_MASK) + 1;
+		else
+			prediv = 0;
+	}
+	if (pll->flags & PLL_HAS_POST) {
+		postdiv = pll_read(pll, PLLPOST);
+		if (postdiv & PLLDIV_EN)
+			postdiv = (postdiv & PLLDIV_RATIO_MASK) + 1;
+		else
+			postdiv = 1;
+	}
+
+	if (!bypass) {
+		if (prediv)
+			rate /= prediv;
+		if (mult)
+			rate *= mult;
+		if (postdiv)
+			rate /= postdiv;
+
+		pr_debug("PLL%d: input = %luMHz, pre[%d] mul[%d] post[%d] "
+			 "--> %luMHz output.\n",
+			 pll->num, clk->parent->rate / 1000000,
+			 prediv, mult, postdiv, rate / 1000000);
+	} else
+		pr_debug("PLL%d: input = %luMHz, bypass mode.\n",
+			 pll->num, clk->parent->rate / 1000000);
+
+	return rate;
+}
+
+
+static void __init __init_clk(struct clk *clk)
+{
+	INIT_LIST_HEAD(&clk->node);
+	INIT_LIST_HEAD(&clk->children);
+	INIT_LIST_HEAD(&clk->childnode);
+
+	if (!clk->recalc) {
+
+		/* Check if clock is a PLL */
+		if (clk->pll_data)
+			clk->recalc = clk_pllclk_recalc;
+
+		/* Else, if it is a PLL-derived clock */
+		else if (clk->flags & CLK_PLL)
+			clk->recalc = clk_sysclk_recalc;
+
+		/* Otherwise, it is a leaf clock (PSC clock) */
+		else if (clk->parent)
+			clk->recalc = clk_leafclk_recalc;
+	}
+}
+
+void __init c6x_clks_init(struct clk_lookup *clocks)
+{
+	struct clk_lookup *c;
+	struct clk *clk;
+	size_t num_clocks = 0;
+
+	for (c = clocks; c->clk; c++) {
+		clk = c->clk;
+
+		__init_clk(clk);
+		clk_register(clk);
+		num_clocks++;
+
+		/* Turn on clocks that Linux doesn't otherwise manage */
+		if (clk->flags & ALWAYS_ENABLED)
+			clk_enable(clk);
+	}
+
+	clkdev_add_table(clocks, num_clocks);
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#define CLKNAME_MAX	10		/* longest clock name */
+#define NEST_DELTA	2
+#define NEST_MAX	4
+
+static void
+dump_clock(struct seq_file *s, unsigned nest, struct clk *parent)
+{
+	char		*state;
+	char		buf[CLKNAME_MAX + NEST_DELTA * NEST_MAX];
+	struct clk	*clk;
+	unsigned	i;
+
+	if (parent->flags & CLK_PLL)
+		state = "pll";
+	else
+		state = "";
+
+	/* <nest spaces> name <pad to end> */
+	memset(buf, ' ', sizeof(buf) - 1);
+	buf[sizeof(buf) - 1] = 0;
+	i = strlen(parent->name);
+	memcpy(buf + nest, parent->name,
+	       min(i, (unsigned)(sizeof(buf) - 1 - nest)));
+
+	seq_printf(s, "%s users=%2d %-3s %9ld Hz\n",
+		   buf, parent->usecount, state, clk_get_rate(parent));
+	/* REVISIT show device associations too */
+
+	/* cost is now small, but not linear... */
+	list_for_each_entry(clk, &parent->children, childnode) {
+		dump_clock(s, nest + NEST_DELTA, clk);
+	}
+}
+
+static int c6x_ck_show(struct seq_file *m, void *v)
+{
+	struct clk *clk;
+
+	/*
+	 * Show clock tree; We trust nonzero usecounts equate to PSC enables...
+	 */
+	mutex_lock(&clocks_mutex);
+	list_for_each_entry(clk, &clocks, node)
+		if (!clk->parent)
+			dump_clock(m, 0, clk);
+	mutex_unlock(&clocks_mutex);
+
+	return 0;
+}
+
+static int c6x_ck_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, c6x_ck_show, NULL);
+}
+
+static const struct file_operations c6x_ck_operations = {
+	.open		= c6x_ck_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static int __init c6x_clk_debugfs_init(void)
+{
+	debugfs_create_file("c6x_clocks", S_IFREG | S_IRUGO, NULL, NULL,
+			    &c6x_ck_operations);
+
+	return 0;
+}
+device_initcall(c6x_clk_debugfs_init);
+#endif /* CONFIG_DEBUG_FS */
diff --git a/kernel/arch/c6x/platforms/plldata.c b/kernel/arch/c6x/platforms/plldata.c
new file mode 100644
index 000000000..755359eb6
--- /dev/null
+++ b/kernel/arch/c6x/platforms/plldata.c
@@ -0,0 +1,469 @@
+/*
+ *  Port on Texas Instruments TMS320C6x architecture
+ *
+ *  Copyright (C) 2011 Texas Instruments Incorporated
+ *  Author: Mark Salter <msalter@redhat.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.
+ */
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/clkdev.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include <asm/clock.h>
+#include <asm/setup.h>
+#include <asm/irq.h>
+
+/*
+ * Common SoC clock support.
+ */
+
+/* Default input for PLL1 */
+struct clk clkin1 = {
+	.name = "clkin1",
+	.node = LIST_HEAD_INIT(clkin1.node),
+	.children = LIST_HEAD_INIT(clkin1.children),
+	.childnode = LIST_HEAD_INIT(clkin1.childnode),
+};
+
+struct pll_data c6x_soc_pll1 = {
+	.num	   = 1,
+	.sysclks   = {
+		{
+			.name = "pll1",
+			.parent = &clkin1,
+			.pll_data = &c6x_soc_pll1,
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk1",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk2",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk3",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk4",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk5",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk6",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk7",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk8",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk9",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk10",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk11",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk12",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk13",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk14",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk15",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+		{
+			.name = "pll1_sysclk16",
+			.parent = &c6x_soc_pll1.sysclks[0],
+			.flags = CLK_PLL,
+		},
+	},
+};
+
+/* CPU core clock */
+struct clk c6x_core_clk = {
+	.name = "core",
+};
+
+/* miscellaneous IO clocks */
+struct clk c6x_i2c_clk = {
+	.name = "i2c",
+};
+
+struct clk c6x_watchdog_clk = {
+	.name = "watchdog",
+};
+
+struct clk c6x_mcbsp1_clk = {
+	.name = "mcbsp1",
+};
+
+struct clk c6x_mcbsp2_clk = {
+	.name = "mcbsp2",
+};
+
+struct clk c6x_mdio_clk = {
+	.name = "mdio",
+};
+
+
+#ifdef CONFIG_SOC_TMS320C6455
+static struct clk_lookup c6455_clks[] = {
+	CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
+	CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]),
+	CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]),
+	CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]),
+	CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]),
+	CLK(NULL, "core", &c6x_core_clk),
+	CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
+	CLK("watchdog", NULL, &c6x_watchdog_clk),
+	CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
+	CLK("", NULL, NULL)
+};
+
+
+static void __init c6455_setup_clocks(struct device_node *node)
+{
+	struct pll_data *pll = &c6x_soc_pll1;
+	struct clk *sysclks = pll->sysclks;
+
+	pll->flags = PLL_HAS_PRE | PLL_HAS_MUL;
+
+	sysclks[2].flags |= FIXED_DIV_PLL;
+	sysclks[2].div = 3;
+	sysclks[3].flags |= FIXED_DIV_PLL;
+	sysclks[3].div = 6;
+	sysclks[4].div = PLLDIV4;
+	sysclks[5].div = PLLDIV5;
+
+	c6x_core_clk.parent = &sysclks[0];
+	c6x_i2c_clk.parent = &sysclks[3];
+	c6x_watchdog_clk.parent = &sysclks[3];
+	c6x_mdio_clk.parent = &sysclks[3];
+
+	c6x_clks_init(c6455_clks);
+}
+#endif /* CONFIG_SOC_TMS320C6455 */
+
+#ifdef CONFIG_SOC_TMS320C6457
+static struct clk_lookup c6457_clks[] = {
+	CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
+	CLK(NULL, "pll1_sysclk1", &c6x_soc_pll1.sysclks[1]),
+	CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]),
+	CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]),
+	CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]),
+	CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]),
+	CLK(NULL, "core", &c6x_core_clk),
+	CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
+	CLK("watchdog", NULL, &c6x_watchdog_clk),
+	CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
+	CLK("", NULL, NULL)
+};
+
+static void __init c6457_setup_clocks(struct device_node *node)
+{
+	struct pll_data *pll = &c6x_soc_pll1;
+	struct clk *sysclks = pll->sysclks;
+
+	pll->flags = PLL_HAS_MUL | PLL_HAS_POST;
+
+	sysclks[1].flags |= FIXED_DIV_PLL;
+	sysclks[1].div = 1;
+	sysclks[2].flags |= FIXED_DIV_PLL;
+	sysclks[2].div = 3;
+	sysclks[3].flags |= FIXED_DIV_PLL;
+	sysclks[3].div = 6;
+	sysclks[4].div = PLLDIV4;
+	sysclks[5].div = PLLDIV5;
+
+	c6x_core_clk.parent = &sysclks[1];
+	c6x_i2c_clk.parent = &sysclks[3];
+	c6x_watchdog_clk.parent = &sysclks[5];
+	c6x_mdio_clk.parent = &sysclks[5];
+
+	c6x_clks_init(c6457_clks);
+}
+#endif /* CONFIG_SOC_TMS320C6455 */
+
+#ifdef CONFIG_SOC_TMS320C6472
+static struct clk_lookup c6472_clks[] = {
+	CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
+	CLK(NULL, "pll1_sysclk1", &c6x_soc_pll1.sysclks[1]),
+	CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]),
+	CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]),
+	CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]),
+	CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]),
+	CLK(NULL, "pll1_sysclk6", &c6x_soc_pll1.sysclks[6]),
+	CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]),
+	CLK(NULL, "pll1_sysclk8", &c6x_soc_pll1.sysclks[8]),
+	CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]),
+	CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]),
+	CLK(NULL, "core", &c6x_core_clk),
+	CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
+	CLK("watchdog", NULL, &c6x_watchdog_clk),
+	CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
+	CLK("", NULL, NULL)
+};
+
+/* assumptions used for delay loop calculations */
+#define MIN_CLKIN1_KHz 15625
+#define MAX_CORE_KHz   700000
+#define MIN_PLLOUT_KHz MIN_CLKIN1_KHz
+
+static void __init c6472_setup_clocks(struct device_node *node)
+{
+	struct pll_data *pll = &c6x_soc_pll1;
+	struct clk *sysclks = pll->sysclks;
+	int i;
+
+	pll->flags = PLL_HAS_MUL;
+
+	for (i = 1; i <= 6; i++) {
+		sysclks[i].flags |= FIXED_DIV_PLL;
+		sysclks[i].div = 1;
+	}
+
+	sysclks[7].flags |= FIXED_DIV_PLL;
+	sysclks[7].div = 3;
+	sysclks[8].flags |= FIXED_DIV_PLL;
+	sysclks[8].div = 6;
+	sysclks[9].flags |= FIXED_DIV_PLL;
+	sysclks[9].div = 2;
+	sysclks[10].div = PLLDIV10;
+
+	c6x_core_clk.parent = &sysclks[get_coreid() + 1];
+	c6x_i2c_clk.parent = &sysclks[8];
+	c6x_watchdog_clk.parent = &sysclks[8];
+	c6x_mdio_clk.parent = &sysclks[5];
+
+	c6x_clks_init(c6472_clks);
+}
+#endif /* CONFIG_SOC_TMS320C6472 */
+
+
+#ifdef CONFIG_SOC_TMS320C6474
+static struct clk_lookup c6474_clks[] = {
+	CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
+	CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]),
+	CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]),
+	CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]),
+	CLK(NULL, "pll1_sysclk11", &c6x_soc_pll1.sysclks[11]),
+	CLK(NULL, "pll1_sysclk12", &c6x_soc_pll1.sysclks[12]),
+	CLK(NULL, "pll1_sysclk13", &c6x_soc_pll1.sysclks[13]),
+	CLK(NULL, "core", &c6x_core_clk),
+	CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
+	CLK("mcbsp.1", NULL, &c6x_mcbsp1_clk),
+	CLK("mcbsp.2", NULL, &c6x_mcbsp2_clk),
+	CLK("watchdog", NULL, &c6x_watchdog_clk),
+	CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
+	CLK("", NULL, NULL)
+};
+
+static void __init c6474_setup_clocks(struct device_node *node)
+{
+	struct pll_data *pll = &c6x_soc_pll1;
+	struct clk *sysclks = pll->sysclks;
+
+	pll->flags = PLL_HAS_MUL;
+
+	sysclks[7].flags |= FIXED_DIV_PLL;
+	sysclks[7].div = 1;
+	sysclks[9].flags |= FIXED_DIV_PLL;
+	sysclks[9].div = 3;
+	sysclks[10].flags |= FIXED_DIV_PLL;
+	sysclks[10].div = 6;
+
+	sysclks[11].div = PLLDIV11;
+
+	sysclks[12].flags |= FIXED_DIV_PLL;
+	sysclks[12].div = 2;
+
+	sysclks[13].div = PLLDIV13;
+
+	c6x_core_clk.parent = &sysclks[7];
+	c6x_i2c_clk.parent = &sysclks[10];
+	c6x_watchdog_clk.parent = &sysclks[10];
+	c6x_mcbsp1_clk.parent = &sysclks[10];
+	c6x_mcbsp2_clk.parent = &sysclks[10];
+
+	c6x_clks_init(c6474_clks);
+}
+#endif /* CONFIG_SOC_TMS320C6474 */
+
+#ifdef CONFIG_SOC_TMS320C6678
+static struct clk_lookup c6678_clks[] = {
+	CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
+	CLK(NULL, "pll1_refclk", &c6x_soc_pll1.sysclks[1]),
+	CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]),
+	CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]),
+	CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]),
+	CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]),
+	CLK(NULL, "pll1_sysclk6", &c6x_soc_pll1.sysclks[6]),
+	CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]),
+	CLK(NULL, "pll1_sysclk8", &c6x_soc_pll1.sysclks[8]),
+	CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]),
+	CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]),
+	CLK(NULL, "pll1_sysclk11", &c6x_soc_pll1.sysclks[11]),
+	CLK(NULL, "core", &c6x_core_clk),
+	CLK("", NULL, NULL)
+};
+
+static void __init c6678_setup_clocks(struct device_node *node)
+{
+	struct pll_data *pll = &c6x_soc_pll1;
+	struct clk *sysclks = pll->sysclks;
+
+	pll->flags = PLL_HAS_MUL;
+
+	sysclks[1].flags |= FIXED_DIV_PLL;
+	sysclks[1].div = 1;
+
+	sysclks[2].div = PLLDIV2;
+
+	sysclks[3].flags |= FIXED_DIV_PLL;
+	sysclks[3].div = 2;
+
+	sysclks[4].flags |= FIXED_DIV_PLL;
+	sysclks[4].div = 3;
+
+	sysclks[5].div = PLLDIV5;
+
+	sysclks[6].flags |= FIXED_DIV_PLL;
+	sysclks[6].div = 64;
+
+	sysclks[7].flags |= FIXED_DIV_PLL;
+	sysclks[7].div = 6;
+
+	sysclks[8].div = PLLDIV8;
+
+	sysclks[9].flags |= FIXED_DIV_PLL;
+	sysclks[9].div = 12;
+
+	sysclks[10].flags |= FIXED_DIV_PLL;
+	sysclks[10].div = 3;
+
+	sysclks[11].flags |= FIXED_DIV_PLL;
+	sysclks[11].div = 6;
+
+	c6x_core_clk.parent = &sysclks[0];
+	c6x_i2c_clk.parent = &sysclks[7];
+
+	c6x_clks_init(c6678_clks);
+}
+#endif /* CONFIG_SOC_TMS320C6678 */
+
+static struct of_device_id c6x_clkc_match[] __initdata = {
+#ifdef CONFIG_SOC_TMS320C6455
+	{ .compatible = "ti,c6455-pll", .data = c6455_setup_clocks },
+#endif
+#ifdef CONFIG_SOC_TMS320C6457
+	{ .compatible = "ti,c6457-pll", .data = c6457_setup_clocks },
+#endif
+#ifdef CONFIG_SOC_TMS320C6472
+	{ .compatible = "ti,c6472-pll", .data = c6472_setup_clocks },
+#endif
+#ifdef CONFIG_SOC_TMS320C6474
+	{ .compatible = "ti,c6474-pll", .data = c6474_setup_clocks },
+#endif
+#ifdef CONFIG_SOC_TMS320C6678
+	{ .compatible = "ti,c6678-pll", .data = c6678_setup_clocks },
+#endif
+	{ .compatible = "ti,c64x+pll" },
+	{}
+};
+
+void __init c64x_setup_clocks(void)
+{
+	void (*__setup_clocks)(struct device_node *np);
+	struct pll_data *pll = &c6x_soc_pll1;
+	struct device_node *node;
+	const struct of_device_id *id;
+	int err;
+	u32 val;
+
+	node = of_find_matching_node(NULL, c6x_clkc_match);
+	if (!node)
+		return;
+
+	pll->base = of_iomap(node, 0);
+	if (!pll->base)
+		goto out;
+
+	err = of_property_read_u32(node, "clock-frequency", &val);
+	if (err || val == 0) {
+		pr_err("%s: no clock-frequency found! Using %dMHz\n",
+		       node->full_name, (int)val / 1000000);
+		val = 25000000;
+	}
+	clkin1.rate = val;
+
+	err = of_property_read_u32(node, "ti,c64x+pll-bypass-delay", &val);
+	if (err)
+		val = 5000;
+	pll->bypass_delay = val;
+
+	err = of_property_read_u32(node, "ti,c64x+pll-reset-delay", &val);
+	if (err)
+		val = 30000;
+	pll->reset_delay = val;
+
+	err = of_property_read_u32(node, "ti,c64x+pll-lock-delay", &val);
+	if (err)
+		val = 30000;
+	pll->lock_delay = val;
+
+	/* id->data is a pointer to SoC-specific setup */
+	id = of_match_node(c6x_clkc_match, node);
+	if (id && id->data) {
+		__setup_clocks = id->data;
+		__setup_clocks(node);
+	}
+
+out:
+	of_node_put(node);
+}
diff --git a/kernel/arch/c6x/platforms/timer64.c b/kernel/arch/c6x/platforms/timer64.c
new file mode 100644
index 000000000..3c73d74a4
--- /dev/null
+++ b/kernel/arch/c6x/platforms/timer64.c
@@ -0,0 +1,245 @@
+/*
+ *  Copyright (C) 2010, 2011 Texas Instruments Incorporated
+ *  Contributed by: Mark Salter (msalter@redhat.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.
+ */
+
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <asm/soc.h>
+#include <asm/dscr.h>
+#include <asm/special_insns.h>
+#include <asm/timer64.h>
+
+struct timer_regs {
+	u32	reserved0;
+	u32	emumgt;
+	u32	reserved1;
+	u32	reserved2;
+	u32	cntlo;
+	u32	cnthi;
+	u32	prdlo;
+	u32	prdhi;
+	u32	tcr;
+	u32	tgcr;
+	u32	wdtcr;
+};
+
+static struct timer_regs __iomem *timer;
+
+#define TCR_TSTATLO	     0x001
+#define TCR_INVOUTPLO	     0x002
+#define TCR_INVINPLO	     0x004
+#define TCR_CPLO	     0x008
+#define TCR_ENAMODELO_ONCE   0x040
+#define TCR_ENAMODELO_CONT   0x080
+#define TCR_ENAMODELO_MASK   0x0c0
+#define TCR_PWIDLO_MASK      0x030
+#define TCR_CLKSRCLO	     0x100
+#define TCR_TIENLO	     0x200
+#define TCR_TSTATHI	     (0x001 << 16)
+#define TCR_INVOUTPHI	     (0x002 << 16)
+#define TCR_CPHI	     (0x008 << 16)
+#define TCR_PWIDHI_MASK      (0x030 << 16)
+#define TCR_ENAMODEHI_ONCE   (0x040 << 16)
+#define TCR_ENAMODEHI_CONT   (0x080 << 16)
+#define TCR_ENAMODEHI_MASK   (0x0c0 << 16)
+
+#define TGCR_TIMLORS	     0x001
+#define TGCR_TIMHIRS	     0x002
+#define TGCR_TIMMODE_UD32    0x004
+#define TGCR_TIMMODE_WDT64   0x008
+#define TGCR_TIMMODE_CD32    0x00c
+#define TGCR_TIMMODE_MASK    0x00c
+#define TGCR_PSCHI_MASK      (0x00f << 8)
+#define TGCR_TDDRHI_MASK     (0x00f << 12)
+
+/*
+ * Timer clocks are divided down from the CPU clock
+ * The divisor is in the EMUMGTCLKSPD register
+ */
+#define TIMER_DIVISOR \
+	((soc_readl(&timer->emumgt) & (0xf << 16)) >> 16)
+
+#define TIMER64_RATE (c6x_core_freq / TIMER_DIVISOR)
+
+#define TIMER64_MODE_DISABLED 0
+#define TIMER64_MODE_ONE_SHOT TCR_ENAMODELO_ONCE
+#define TIMER64_MODE_PERIODIC TCR_ENAMODELO_CONT
+
+static int timer64_mode;
+static int timer64_devstate_id = -1;
+
+static void timer64_config(unsigned long period)
+{
+	u32 tcr = soc_readl(&timer->tcr) & ~TCR_ENAMODELO_MASK;
+
+	soc_writel(tcr, &timer->tcr);
+	soc_writel(period - 1, &timer->prdlo);
+	soc_writel(0, &timer->cntlo);
+	tcr |= timer64_mode;
+	soc_writel(tcr, &timer->tcr);
+}
+
+static void timer64_enable(void)
+{
+	u32 val;
+
+	if (timer64_devstate_id >= 0)
+		dscr_set_devstate(timer64_devstate_id, DSCR_DEVSTATE_ENABLED);
+
+	/* disable timer, reset count */
+	soc_writel(soc_readl(&timer->tcr) & ~TCR_ENAMODELO_MASK, &timer->tcr);
+	soc_writel(0, &timer->prdlo);
+
+	/* use internal clock and 1 cycle pulse width */
+	val = soc_readl(&timer->tcr);
+	soc_writel(val & ~(TCR_CLKSRCLO | TCR_PWIDLO_MASK), &timer->tcr);
+
+	/* dual 32-bit unchained mode */
+	val = soc_readl(&timer->tgcr) & ~TGCR_TIMMODE_MASK;
+	soc_writel(val, &timer->tgcr);
+	soc_writel(val | (TGCR_TIMLORS | TGCR_TIMMODE_UD32), &timer->tgcr);
+}
+
+static void timer64_disable(void)
+{
+	/* disable timer, reset count */
+	soc_writel(soc_readl(&timer->tcr) & ~TCR_ENAMODELO_MASK, &timer->tcr);
+	soc_writel(0, &timer->prdlo);
+
+	if (timer64_devstate_id >= 0)
+		dscr_set_devstate(timer64_devstate_id, DSCR_DEVSTATE_DISABLED);
+}
+
+static int next_event(unsigned long delta,
+		      struct clock_event_device *evt)
+{
+	timer64_config(delta);
+	return 0;
+}
+
+static void set_clock_mode(enum clock_event_mode mode,
+			   struct clock_event_device *evt)
+{
+	switch (mode) {
+	case CLOCK_EVT_MODE_PERIODIC:
+		timer64_enable();
+		timer64_mode = TIMER64_MODE_PERIODIC;
+		timer64_config(TIMER64_RATE / HZ);
+		break;
+	case CLOCK_EVT_MODE_ONESHOT:
+		timer64_enable();
+		timer64_mode = TIMER64_MODE_ONE_SHOT;
+		break;
+	case CLOCK_EVT_MODE_UNUSED:
+	case CLOCK_EVT_MODE_SHUTDOWN:
+		timer64_mode = TIMER64_MODE_DISABLED;
+		timer64_disable();
+		break;
+	case CLOCK_EVT_MODE_RESUME:
+		break;
+	}
+}
+
+static struct clock_event_device t64_clockevent_device = {
+	.name		= "TIMER64_EVT32_TIMER",
+	.features	= CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,
+	.rating		= 200,
+	.set_mode	= set_clock_mode,
+	.set_next_event	= next_event,
+};
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+	struct clock_event_device *cd = &t64_clockevent_device;
+
+	cd->event_handler(cd);
+
+	return IRQ_HANDLED;
+}
+
+static struct irqaction timer_iact = {
+	.name		= "timer",
+	.flags		= IRQF_TIMER,
+	.handler	= timer_interrupt,
+	.dev_id		= &t64_clockevent_device,
+};
+
+void __init timer64_init(void)
+{
+	struct clock_event_device *cd = &t64_clockevent_device;
+	struct device_node *np, *first = NULL;
+	u32 val;
+	int err, found = 0;
+
+	for_each_compatible_node(np, NULL, "ti,c64x+timer64") {
+		err = of_property_read_u32(np, "ti,core-mask", &val);
+		if (!err) {
+			if (val & (1 << get_coreid())) {
+				found = 1;
+				break;
+			}
+		} else if (!first)
+			first = np;
+	}
+	if (!found) {
+		/* try first one with no core-mask */
+		if (first)
+			np = of_node_get(first);
+		else {
+			pr_debug("Cannot find ti,c64x+timer64 timer.\n");
+			return;
+		}
+	}
+
+	timer = of_iomap(np, 0);
+	if (!timer) {
+		pr_debug("%s: Cannot map timer registers.\n", np->full_name);
+		goto out;
+	}
+	pr_debug("%s: Timer registers=%p.\n", np->full_name, timer);
+
+	cd->irq	= irq_of_parse_and_map(np, 0);
+	if (cd->irq == NO_IRQ) {
+		pr_debug("%s: Cannot find interrupt.\n", np->full_name);
+		iounmap(timer);
+		goto out;
+	}
+
+	/* If there is a device state control, save the ID. */
+	err = of_property_read_u32(np, "ti,dscr-dev-enable", &val);
+	if (!err) {
+		timer64_devstate_id = val;
+
+		/*
+		 * It is necessary to enable the timer block here because
+		 * the TIMER_DIVISOR macro needs to read a timer register
+		 * to get the divisor.
+		 */
+		dscr_set_devstate(timer64_devstate_id, DSCR_DEVSTATE_ENABLED);
+	}
+
+	pr_debug("%s: Timer irq=%d.\n", np->full_name, cd->irq);
+
+	clockevents_calc_mult_shift(cd, c6x_core_freq / TIMER_DIVISOR, 5);
+
+	cd->max_delta_ns	= clockevent_delta2ns(0x7fffffff, cd);
+	cd->min_delta_ns	= clockevent_delta2ns(250, cd);
+
+	cd->cpumask		= cpumask_of(smp_processor_id());
+
+	clockevents_register_device(cd);
+	setup_irq(cd->irq, &timer_iact);
+
+out:
+	of_node_put(np);
+	return;
+}