blackfin architecture

This adds support for the Analog Devices Blackfin processor architecture, and
currently supports the BF533, BF532, BF531, BF537, BF536, BF534, and BF561
(Dual Core) devices, with a variety of development platforms including those
avaliable from Analog Devices (BF533-EZKit, BF533-STAMP, BF537-STAMP,
BF561-EZKIT), and Bluetechnix!  Tinyboards.

The Blackfin architecture was jointly developed by Intel and Analog Devices
Inc.  (ADI) as the Micro Signal Architecture (MSA) core and introduced it in
December of 2000.  Since then ADI has put this core into its Blackfin
processor family of devices.  The Blackfin core has the advantages of a clean,
orthogonal,RISC-like microprocessor instruction set.  It combines a dual-MAC
(Multiply/Accumulate), state-of-the-art signal processing engine and
single-instruction, multiple-data (SIMD) multimedia capabilities into a single
instruction-set architecture.

The Blackfin architecture, including the instruction set, is described by the
ADSP-BF53x/BF56x Blackfin Processor Programming Reference
http://blackfin.uclinux.org/gf/download/frsrelease/29/2549/Blackfin_PRM.pdf

The Blackfin processor is already supported by major releases of gcc, and
there are binary and source rpms/tarballs for many architectures at:
http://blackfin.uclinux.org/gf/project/toolchain/frs There is complete
documentation, including "getting started" guides available at:
http://docs.blackfin.uclinux.org/ which provides links to the sources and
patches you will need in order to set up a cross-compiling environment for
bfin-linux-uclibc

This patch, as well as the other patches (toolchain, distribution,
uClibc) are actively supported by Analog Devices Inc, at:
http://blackfin.uclinux.org/

We have tested this on LTP, and our test plan (including pass/fails) can
be found at:
http://docs.blackfin.uclinux.org/doku.php?id=testing_the_linux_kernel

[m.kozlowski@tuxland.pl: balance parenthesis in blackfin header files]
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Aubrey Li <aubrey.li@analog.com>
Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

20 files changed, 6111 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile
new file mode 100644
index 0000000..f3b7d2f
--- /dev/null
+++ b/arch/blackfin/kernel/Makefile
@@ -0,0 +1,14 @@
+#
+# arch/blackfin/kernel/Makefile
+#
+
+extra-y := init_task.o vmlinux.lds
+
+obj-y := \
+	entry.o process.o bfin_ksyms.o ptrace.o setup.o signal.o \
+	sys_bfin.o time.o traps.o irqchip.o dma-mapping.o bfin_gpio.o \
+	flat.o
+
+obj-$(CONFIG_MODULES)                += module.o
+obj-$(CONFIG_BFIN_DMA_5XX)           += bfin_dma_5xx.o
+obj-$(CONFIG_DUAL_CORE_TEST_MODULE)  += dualcore_test.o
diff --git a/arch/blackfin/kernel/asm-offsets.c b/arch/blackfin/kernel/asm-offsets.c
new file mode 100644
index 0000000..41d9a9f
--- /dev/null
+++ b/arch/blackfin/kernel/asm-offsets.c
@@ -0,0 +1,136 @@
+/*
+ * File:         arch/blackfin/kernel/asm-offsets.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:  generate definitions needed by assembly language modules.
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/stddef.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/ptrace.h>
+#include <linux/hardirq.h>
+#include <asm/irq.h>
+#include <asm/thread_info.h>
+
+#define DEFINE(sym, val) \
+        asm volatile("\n->" #sym " %0 " #val : : "i" (val))
+
+int main(void)
+{
+	/* offsets into the task struct */
+	DEFINE(TASK_STATE, offsetof(struct task_struct, state));
+	DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
+	DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
+	DEFINE(TASK_BLOCKED, offsetof(struct task_struct, blocked));
+	DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
+	DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, thread_info));
+	DEFINE(TASK_MM, offsetof(struct task_struct, mm));
+	DEFINE(TASK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
+	DEFINE(TASK_SIGPENDING, offsetof(struct task_struct, pending));
+
+	/* offsets into the irq_cpustat_t struct */
+	DEFINE(CPUSTAT_SOFTIRQ_PENDING,
+	       offsetof(irq_cpustat_t, __softirq_pending));
+
+	/* offsets into the thread struct */
+	DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp));
+	DEFINE(THREAD_USP, offsetof(struct thread_struct, usp));
+	DEFINE(THREAD_SR, offsetof(struct thread_struct, seqstat));
+	DEFINE(PT_SR, offsetof(struct thread_struct, seqstat));
+	DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0));
+	DEFINE(THREAD_PC, offsetof(struct thread_struct, pc));
+	DEFINE(KERNEL_STACK_SIZE, THREAD_SIZE);
+
+	/* offsets into the pt_regs */
+	DEFINE(PT_ORIG_P0, offsetof(struct pt_regs, orig_p0));
+	DEFINE(PT_ORIG_PC, offsetof(struct pt_regs, orig_pc));
+	DEFINE(PT_R0, offsetof(struct pt_regs, r0));
+	DEFINE(PT_R1, offsetof(struct pt_regs, r1));
+	DEFINE(PT_R2, offsetof(struct pt_regs, r2));
+	DEFINE(PT_R3, offsetof(struct pt_regs, r3));
+	DEFINE(PT_R4, offsetof(struct pt_regs, r4));
+	DEFINE(PT_R5, offsetof(struct pt_regs, r5));
+	DEFINE(PT_R6, offsetof(struct pt_regs, r6));
+	DEFINE(PT_R7, offsetof(struct pt_regs, r7));
+
+	DEFINE(PT_P0, offsetof(struct pt_regs, p0));
+	DEFINE(PT_P1, offsetof(struct pt_regs, p1));
+	DEFINE(PT_P2, offsetof(struct pt_regs, p2));
+	DEFINE(PT_P3, offsetof(struct pt_regs, p3));
+	DEFINE(PT_P4, offsetof(struct pt_regs, p4));
+	DEFINE(PT_P5, offsetof(struct pt_regs, p5));
+
+	DEFINE(PT_FP, offsetof(struct pt_regs, fp));
+	DEFINE(PT_USP, offsetof(struct pt_regs, usp));
+	DEFINE(PT_I0, offsetof(struct pt_regs, i0));
+	DEFINE(PT_I1, offsetof(struct pt_regs, i1));
+	DEFINE(PT_I2, offsetof(struct pt_regs, i2));
+	DEFINE(PT_I3, offsetof(struct pt_regs, i3));
+	DEFINE(PT_M0, offsetof(struct pt_regs, m0));
+	DEFINE(PT_M1, offsetof(struct pt_regs, m1));
+	DEFINE(PT_M2, offsetof(struct pt_regs, m2));
+	DEFINE(PT_M3, offsetof(struct pt_regs, m3));
+	DEFINE(PT_L0, offsetof(struct pt_regs, l0));
+	DEFINE(PT_L1, offsetof(struct pt_regs, l1));
+	DEFINE(PT_L2, offsetof(struct pt_regs, l2));
+	DEFINE(PT_L3, offsetof(struct pt_regs, l3));
+	DEFINE(PT_B0, offsetof(struct pt_regs, b0));
+	DEFINE(PT_B1, offsetof(struct pt_regs, b1));
+	DEFINE(PT_B2, offsetof(struct pt_regs, b2));
+	DEFINE(PT_B3, offsetof(struct pt_regs, b3));
+	DEFINE(PT_A0X, offsetof(struct pt_regs, a0x));
+	DEFINE(PT_A0W, offsetof(struct pt_regs, a0w));
+	DEFINE(PT_A1X, offsetof(struct pt_regs, a1x));
+	DEFINE(PT_A1W, offsetof(struct pt_regs, a1w));
+	DEFINE(PT_LC0, offsetof(struct pt_regs, lc0));
+	DEFINE(PT_LC1, offsetof(struct pt_regs, lc1));
+	DEFINE(PT_LT0, offsetof(struct pt_regs, lt0));
+	DEFINE(PT_LT1, offsetof(struct pt_regs, lt1));
+	DEFINE(PT_LB0, offsetof(struct pt_regs, lb0));
+	DEFINE(PT_LB1, offsetof(struct pt_regs, lb1));
+	DEFINE(PT_ASTAT, offsetof(struct pt_regs, astat));
+	DEFINE(PT_RESERVED, offsetof(struct pt_regs, reserved));
+	DEFINE(PT_RETS, offsetof(struct pt_regs, rets));
+	DEFINE(PT_PC, offsetof(struct pt_regs, pc));
+	DEFINE(PT_RETX, offsetof(struct pt_regs, retx));
+	DEFINE(PT_RETN, offsetof(struct pt_regs, retn));
+	DEFINE(PT_RETE, offsetof(struct pt_regs, rete));
+	DEFINE(PT_SEQSTAT, offsetof(struct pt_regs, seqstat));
+	DEFINE(PT_SYSCFG, offsetof(struct pt_regs, syscfg));
+	DEFINE(PT_IPEND, offsetof(struct pt_regs, ipend));
+	DEFINE(SIZEOF_PTREGS, sizeof(struct pt_regs));
+	DEFINE(PT_TEXT_ADDR, sizeof(struct pt_regs));        /* Needed by gdb */
+	DEFINE(PT_TEXT_END_ADDR, 4 + sizeof(struct pt_regs));/* Needed by gdb */
+	DEFINE(PT_DATA_ADDR, 8 + sizeof(struct pt_regs));    /* Needed by gdb */
+	DEFINE(PT_FDPIC_EXEC, 12 + sizeof(struct pt_regs));  /* Needed by gdb */
+	DEFINE(PT_FDPIC_INTERP, 16 + sizeof(struct pt_regs));/* Needed by gdb */
+
+	/* signal defines */
+	DEFINE(SIGSEGV, SIGSEGV);
+	DEFINE(SIGTRAP, SIGTRAP);
+
+	return 0;
+}
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
new file mode 100644
index 0000000..8ea079e
--- /dev/null
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -0,0 +1,742 @@
+/*
+ * File:         arch/blackfin/kernel/bfin_dma_5xx.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:  This file contains the simple DMA Implementation for Blackfin
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+
+#include <asm/dma.h>
+#include <asm/cacheflush.h>
+
+/* Remove unused code not exported by symbol or internally called */
+#define REMOVE_DEAD_CODE
+
+/**************************************************************************
+ * Global Variables
+***************************************************************************/
+
+static struct dma_channel dma_ch[MAX_BLACKFIN_DMA_CHANNEL];
+#if defined (CONFIG_BF561)
+static struct dma_register *base_addr[MAX_BLACKFIN_DMA_CHANNEL] = {
+	(struct dma_register *) DMA1_0_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_1_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_2_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_3_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_4_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_5_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_6_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_7_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_8_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_9_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_10_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_11_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_0_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_1_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_2_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_3_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_4_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_5_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_6_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_7_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_8_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_9_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_10_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_11_NEXT_DESC_PTR,
+	(struct dma_register *) MDMA1_D0_NEXT_DESC_PTR,
+	(struct dma_register *) MDMA1_S0_NEXT_DESC_PTR,
+	(struct dma_register *) MDMA1_D1_NEXT_DESC_PTR,
+	(struct dma_register *) MDMA1_S1_NEXT_DESC_PTR,
+	(struct dma_register *) MDMA2_D0_NEXT_DESC_PTR,
+	(struct dma_register *) MDMA2_S0_NEXT_DESC_PTR,
+	(struct dma_register *) MDMA2_D1_NEXT_DESC_PTR,
+	(struct dma_register *) MDMA2_S1_NEXT_DESC_PTR,
+	(struct dma_register *) IMDMA_D0_NEXT_DESC_PTR,
+	(struct dma_register *) IMDMA_S0_NEXT_DESC_PTR,
+	(struct dma_register *) IMDMA_D1_NEXT_DESC_PTR,
+	(struct dma_register *) IMDMA_S1_NEXT_DESC_PTR,
+};
+#else
+static struct dma_register *base_addr[MAX_BLACKFIN_DMA_CHANNEL] = {
+	(struct dma_register *) DMA0_NEXT_DESC_PTR,
+	(struct dma_register *) DMA1_NEXT_DESC_PTR,
+	(struct dma_register *) DMA2_NEXT_DESC_PTR,
+	(struct dma_register *) DMA3_NEXT_DESC_PTR,
+	(struct dma_register *) DMA4_NEXT_DESC_PTR,
+	(struct dma_register *) DMA5_NEXT_DESC_PTR,
+	(struct dma_register *) DMA6_NEXT_DESC_PTR,
+	(struct dma_register *) DMA7_NEXT_DESC_PTR,
+#if (defined(CONFIG_BF537) || defined(CONFIG_BF534) || defined(CONFIG_BF536))
+	(struct dma_register *) DMA8_NEXT_DESC_PTR,
+	(struct dma_register *) DMA9_NEXT_DESC_PTR,
+	(struct dma_register *) DMA10_NEXT_DESC_PTR,
+	(struct dma_register *) DMA11_NEXT_DESC_PTR,
+#endif
+	(struct dma_register *) MDMA_D0_NEXT_DESC_PTR,
+	(struct dma_register *) MDMA_S0_NEXT_DESC_PTR,
+	(struct dma_register *) MDMA_D1_NEXT_DESC_PTR,
+	(struct dma_register *) MDMA_S1_NEXT_DESC_PTR,
+};
+#endif
+
+/*------------------------------------------------------------------------------
+ *       Set the Buffer Clear bit in the Configuration register of specific DMA
+ *       channel. This will stop the descriptor based DMA operation.
+ *-----------------------------------------------------------------------------*/
+static void clear_dma_buffer(unsigned int channel)
+{
+	dma_ch[channel].regs->cfg |= RESTART;
+	SSYNC();
+	dma_ch[channel].regs->cfg &= ~RESTART;
+	SSYNC();
+}
+
+int __init blackfin_dma_init(void)
+{
+	int i;
+
+	printk(KERN_INFO "Blackfin DMA Controller\n");
+
+	for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++) {
+		dma_ch[i].chan_status = DMA_CHANNEL_FREE;
+		dma_ch[i].regs = base_addr[i];
+		mutex_init(&(dma_ch[i].dmalock));
+	}
+
+	return 0;
+}
+
+arch_initcall(blackfin_dma_init);
+
+/*
+ *	Form the channel find the irq number for that channel.
+ */
+#if !defined(CONFIG_BF561)
+
+static int bf533_channel2irq(unsigned int channel)
+{
+	int ret_irq = -1;
+
+	switch (channel) {
+	case CH_PPI:
+		ret_irq = IRQ_PPI;
+		break;
+
+#if (defined(CONFIG_BF537) || defined(CONFIG_BF534) || defined(CONFIG_BF536))
+	case CH_EMAC_RX:
+		ret_irq = IRQ_MAC_RX;
+		break;
+
+	case CH_EMAC_TX:
+		ret_irq = IRQ_MAC_TX;
+		break;
+
+	case CH_UART1_RX:
+		ret_irq = IRQ_UART1_RX;
+		break;
+
+	case CH_UART1_TX:
+		ret_irq = IRQ_UART1_TX;
+		break;
+#endif
+
+	case CH_SPORT0_RX:
+		ret_irq = IRQ_SPORT0_RX;
+		break;
+
+	case CH_SPORT0_TX:
+		ret_irq = IRQ_SPORT0_TX;
+		break;
+
+	case CH_SPORT1_RX:
+		ret_irq = IRQ_SPORT1_RX;
+		break;
+
+	case CH_SPORT1_TX:
+		ret_irq = IRQ_SPORT1_TX;
+		break;
+
+	case CH_SPI:
+		ret_irq = IRQ_SPI;
+		break;
+
+	case CH_UART_RX:
+		ret_irq = IRQ_UART_RX;
+		break;
+
+	case CH_UART_TX:
+		ret_irq = IRQ_UART_TX;
+		break;
+
+	case CH_MEM_STREAM0_SRC:
+	case CH_MEM_STREAM0_DEST:
+		ret_irq = IRQ_MEM_DMA0;
+		break;
+
+	case CH_MEM_STREAM1_SRC:
+	case CH_MEM_STREAM1_DEST:
+		ret_irq = IRQ_MEM_DMA1;
+		break;
+	}
+	return ret_irq;
+}
+
+# define channel2irq(channel) bf533_channel2irq(channel)
+
+#else
+
+static int bf561_channel2irq(unsigned int channel)
+{
+	int ret_irq = -1;
+
+	switch (channel) {
+	case CH_PPI0:
+		ret_irq = IRQ_PPI0;
+		break;
+	case CH_PPI1:
+		ret_irq = IRQ_PPI1;
+		break;
+	case CH_SPORT0_RX:
+		ret_irq = IRQ_SPORT0_RX;
+		break;
+	case CH_SPORT0_TX:
+		ret_irq = IRQ_SPORT0_TX;
+		break;
+	case CH_SPORT1_RX:
+		ret_irq = IRQ_SPORT1_RX;
+		break;
+	case CH_SPORT1_TX:
+		ret_irq = IRQ_SPORT1_TX;
+		break;
+	case CH_SPI:
+		ret_irq = IRQ_SPI;
+		break;
+	case CH_UART_RX:
+		ret_irq = IRQ_UART_RX;
+		break;
+	case CH_UART_TX:
+		ret_irq = IRQ_UART_TX;
+		break;
+
+	case CH_MEM_STREAM0_SRC:
+	case CH_MEM_STREAM0_DEST:
+		ret_irq = IRQ_MEM_DMA0;
+		break;
+	case CH_MEM_STREAM1_SRC:
+	case CH_MEM_STREAM1_DEST:
+		ret_irq = IRQ_MEM_DMA1;
+		break;
+	case CH_MEM_STREAM2_SRC:
+	case CH_MEM_STREAM2_DEST:
+		ret_irq = IRQ_MEM_DMA2;
+		break;
+	case CH_MEM_STREAM3_SRC:
+	case CH_MEM_STREAM3_DEST:
+		ret_irq = IRQ_MEM_DMA3;
+		break;
+
+	case CH_IMEM_STREAM0_SRC:
+	case CH_IMEM_STREAM0_DEST:
+		ret_irq = IRQ_IMEM_DMA0;
+		break;
+	case CH_IMEM_STREAM1_SRC:
+	case CH_IMEM_STREAM1_DEST:
+		ret_irq = IRQ_IMEM_DMA1;
+		break;
+	}
+	return ret_irq;
+}
+
+# define channel2irq(channel) bf561_channel2irq(channel)
+
+#endif
+
+/*------------------------------------------------------------------------------
+ *	Request the specific DMA channel from the system.
+ *-----------------------------------------------------------------------------*/
+int request_dma(unsigned int channel, char *device_id)
+{
+
+	pr_debug("request_dma() : BEGIN \n");
+	mutex_lock(&(dma_ch[channel].dmalock));
+
+	if ((dma_ch[channel].chan_status == DMA_CHANNEL_REQUESTED)
+	    || (dma_ch[channel].chan_status == DMA_CHANNEL_ENABLED)) {
+		mutex_unlock(&(dma_ch[channel].dmalock));
+		pr_debug("DMA CHANNEL IN USE  \n");
+		return -EBUSY;
+	} else {
+		dma_ch[channel].chan_status = DMA_CHANNEL_REQUESTED;
+		pr_debug("DMA CHANNEL IS ALLOCATED  \n");
+	}
+
+	mutex_unlock(&(dma_ch[channel].dmalock));
+
+	dma_ch[channel].device_id = device_id;
+	dma_ch[channel].irq_callback = NULL;
+
+	/* This is to be enabled by putting a restriction -
+	 * you have to request DMA, before doing any operations on
+	 * descriptor/channel
+	 */
+	pr_debug("request_dma() : END  \n");
+	return channel;
+}
+EXPORT_SYMBOL(request_dma);
+
+int set_dma_callback(unsigned int channel, dma_interrupt_t callback, void *data)
+{
+	int ret_irq = 0;
+
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	if (callback != NULL) {
+		int ret_val;
+		ret_irq = channel2irq(channel);
+
+		dma_ch[channel].data = data;
+
+		ret_val =
+		    request_irq(ret_irq, (void *)callback, IRQF_DISABLED,
+				dma_ch[channel].device_id, data);
+		if (ret_val) {
+			printk(KERN_NOTICE
+			       "Request irq in DMA engine failed.\n");
+			return -EPERM;
+		}
+		dma_ch[channel].irq_callback = callback;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(set_dma_callback);
+
+void free_dma(unsigned int channel)
+{
+	int ret_irq;
+
+	pr_debug("freedma() : BEGIN \n");
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	/* Halt the DMA */
+	disable_dma(channel);
+	clear_dma_buffer(channel);
+
+	if (dma_ch[channel].irq_callback != NULL) {
+		ret_irq = channel2irq(channel);
+		free_irq(ret_irq, dma_ch[channel].data);
+	}
+
+	/* Clear the DMA Variable in the Channel */
+	mutex_lock(&(dma_ch[channel].dmalock));
+	dma_ch[channel].chan_status = DMA_CHANNEL_FREE;
+	mutex_unlock(&(dma_ch[channel].dmalock));
+
+	pr_debug("freedma() : END \n");
+}
+EXPORT_SYMBOL(free_dma);
+
+void dma_enable_irq(unsigned int channel)
+{
+	int ret_irq;
+
+	pr_debug("dma_enable_irq() : BEGIN \n");
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	ret_irq = channel2irq(channel);
+	enable_irq(ret_irq);
+}
+EXPORT_SYMBOL(dma_enable_irq);
+
+void dma_disable_irq(unsigned int channel)
+{
+	int ret_irq;
+
+	pr_debug("dma_disable_irq() : BEGIN \n");
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	ret_irq = channel2irq(channel);
+	disable_irq(ret_irq);
+}
+EXPORT_SYMBOL(dma_disable_irq);
+
+int dma_channel_active(unsigned int channel)
+{
+	if (dma_ch[channel].chan_status == DMA_CHANNEL_FREE) {
+		return 0;
+	} else {
+		return 1;
+	}
+}
+EXPORT_SYMBOL(dma_channel_active);
+
+/*------------------------------------------------------------------------------
+*	stop the specific DMA channel.
+*-----------------------------------------------------------------------------*/
+void disable_dma(unsigned int channel)
+{
+	pr_debug("stop_dma() : BEGIN \n");
+
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	dma_ch[channel].regs->cfg &= ~DMAEN;	/* Clean the enable bit */
+	SSYNC();
+	dma_ch[channel].chan_status = DMA_CHANNEL_REQUESTED;
+	/* Needs to be enabled Later */
+	pr_debug("stop_dma() : END \n");
+	return;
+}
+EXPORT_SYMBOL(disable_dma);
+
+void enable_dma(unsigned int channel)
+{
+	pr_debug("enable_dma() : BEGIN \n");
+
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	dma_ch[channel].chan_status = DMA_CHANNEL_ENABLED;
+	dma_ch[channel].regs->curr_x_count = 0;
+	dma_ch[channel].regs->curr_y_count = 0;
+
+	dma_ch[channel].regs->cfg |= DMAEN;	/* Set the enable bit */
+	SSYNC();
+	pr_debug("enable_dma() : END \n");
+	return;
+}
+EXPORT_SYMBOL(enable_dma);
+
+/*------------------------------------------------------------------------------
+*		Set the Start Address register for the specific DMA channel
+* 		This function can be used for register based DMA,
+*		to setup the start address
+*		addr:		Starting address of the DMA Data to be transferred.
+*-----------------------------------------------------------------------------*/
+void set_dma_start_addr(unsigned int channel, unsigned long addr)
+{
+	pr_debug("set_dma_start_addr() : BEGIN \n");
+
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	dma_ch[channel].regs->start_addr = addr;
+	SSYNC();
+	pr_debug("set_dma_start_addr() : END\n");
+}
+EXPORT_SYMBOL(set_dma_start_addr);
+
+void set_dma_next_desc_addr(unsigned int channel, unsigned long addr)
+{
+	pr_debug("set_dma_next_desc_addr() : BEGIN \n");
+
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	dma_ch[channel].regs->next_desc_ptr = addr;
+	SSYNC();
+	pr_debug("set_dma_start_addr() : END\n");
+}
+EXPORT_SYMBOL(set_dma_next_desc_addr);
+
+void set_dma_x_count(unsigned int channel, unsigned short x_count)
+{
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	dma_ch[channel].regs->x_count = x_count;
+	SSYNC();
+}
+EXPORT_SYMBOL(set_dma_x_count);
+
+void set_dma_y_count(unsigned int channel, unsigned short y_count)
+{
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	dma_ch[channel].regs->y_count = y_count;
+	SSYNC();
+}
+EXPORT_SYMBOL(set_dma_y_count);
+
+void set_dma_x_modify(unsigned int channel, short x_modify)
+{
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	dma_ch[channel].regs->x_modify = x_modify;
+	SSYNC();
+}
+EXPORT_SYMBOL(set_dma_x_modify);
+
+void set_dma_y_modify(unsigned int channel, short y_modify)
+{
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	dma_ch[channel].regs->y_modify = y_modify;
+	SSYNC();
+}
+EXPORT_SYMBOL(set_dma_y_modify);
+
+void set_dma_config(unsigned int channel, unsigned short config)
+{
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	dma_ch[channel].regs->cfg = config;
+	SSYNC();
+}
+EXPORT_SYMBOL(set_dma_config);
+
+unsigned short
+set_bfin_dma_config(char direction, char flow_mode,
+		    char intr_mode, char dma_mode, char width)
+{
+	unsigned short config;
+
+	config =
+	    ((direction << 1) | (width << 2) | (dma_mode << 4) |
+	     (intr_mode << 6) | (flow_mode << 12) | RESTART);
+	return config;
+}
+EXPORT_SYMBOL(set_bfin_dma_config);
+
+void set_dma_sg(unsigned int channel, struct dmasg * sg, int nr_sg)
+{
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	dma_ch[channel].regs->cfg |= ((nr_sg & 0x0F) << 8);
+
+	dma_ch[channel].regs->next_desc_ptr = (unsigned int)sg;
+
+	SSYNC();
+}
+EXPORT_SYMBOL(set_dma_sg);
+
+/*------------------------------------------------------------------------------
+ *	Get the DMA status of a specific DMA channel from the system.
+ *-----------------------------------------------------------------------------*/
+unsigned short get_dma_curr_irqstat(unsigned int channel)
+{
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	return dma_ch[channel].regs->irq_status;
+}
+EXPORT_SYMBOL(get_dma_curr_irqstat);
+
+/*------------------------------------------------------------------------------
+ *	Clear the DMA_DONE bit in DMA status. Stop the DMA completion interrupt.
+ *-----------------------------------------------------------------------------*/
+void clear_dma_irqstat(unsigned int channel)
+{
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+	dma_ch[channel].regs->irq_status |= 3;
+}
+EXPORT_SYMBOL(clear_dma_irqstat);
+
+/*------------------------------------------------------------------------------
+ *	Get current DMA xcount of a specific DMA channel from the system.
+ *-----------------------------------------------------------------------------*/
+unsigned short get_dma_curr_xcount(unsigned int channel)
+{
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	return dma_ch[channel].regs->curr_x_count;
+}
+EXPORT_SYMBOL(get_dma_curr_xcount);
+
+/*------------------------------------------------------------------------------
+ *	Get current DMA ycount of a specific DMA channel from the system.
+ *-----------------------------------------------------------------------------*/
+unsigned short get_dma_curr_ycount(unsigned int channel)
+{
+	BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
+	       && channel < MAX_BLACKFIN_DMA_CHANNEL));
+
+	return dma_ch[channel].regs->curr_y_count;
+}
+EXPORT_SYMBOL(get_dma_curr_ycount);
+
+void *dma_memcpy(void *dest, const void *src, size_t size)
+{
+	int direction;	/* 1 - address decrease, 0 - address increase */
+	int flag_align;	/* 1 - address aligned,  0 - address unaligned */
+	int flag_2D;	/* 1 - 2D DMA needed,	 0 - 1D DMA needed */
+
+	if (size <= 0)
+		return NULL;
+
+	if ((unsigned long)src < memory_end)
+		blackfin_dcache_flush_range((unsigned int)src,
+					    (unsigned int)(src + size));
+
+	bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR);
+
+	if ((unsigned long)src < (unsigned long)dest)
+		direction = 1;
+	else
+		direction = 0;
+
+	if ((((unsigned long)dest % 2) == 0) && (((unsigned long)src % 2) == 0)
+	    && ((size % 2) == 0))
+		flag_align = 1;
+	else
+		flag_align = 0;
+
+	if (size > 0x10000)	/* size > 64K */
+		flag_2D = 1;
+	else
+		flag_2D = 0;
+
+	/* Setup destination and source start address */
+	if (direction) {
+		if (flag_align) {
+			bfin_write_MDMA_D0_START_ADDR(dest + size - 2);
+			bfin_write_MDMA_S0_START_ADDR(src + size - 2);
+		} else {
+			bfin_write_MDMA_D0_START_ADDR(dest + size - 1);
+			bfin_write_MDMA_S0_START_ADDR(src + size - 1);
+		}
+	} else {
+		bfin_write_MDMA_D0_START_ADDR(dest);
+		bfin_write_MDMA_S0_START_ADDR(src);
+	}
+
+	/* Setup destination and source xcount */
+	if (flag_2D) {
+		if (flag_align) {
+			bfin_write_MDMA_D0_X_COUNT(1024 / 2);
+			bfin_write_MDMA_S0_X_COUNT(1024 / 2);
+		} else {
+			bfin_write_MDMA_D0_X_COUNT(1024);
+			bfin_write_MDMA_S0_X_COUNT(1024);
+		}
+		bfin_write_MDMA_D0_Y_COUNT(size >> 10);
+		bfin_write_MDMA_S0_Y_COUNT(size >> 10);
+	} else {
+		if (flag_align) {
+			bfin_write_MDMA_D0_X_COUNT(size / 2);
+			bfin_write_MDMA_S0_X_COUNT(size / 2);
+		} else {
+			bfin_write_MDMA_D0_X_COUNT(size);
+			bfin_write_MDMA_S0_X_COUNT(size);
+		}
+	}
+
+	/* Setup destination and source xmodify and ymodify */
+	if (direction) {
+		if (flag_align) {
+			bfin_write_MDMA_D0_X_MODIFY(-2);
+			bfin_write_MDMA_S0_X_MODIFY(-2);
+			if (flag_2D) {
+				bfin_write_MDMA_D0_Y_MODIFY(-2);
+				bfin_write_MDMA_S0_Y_MODIFY(-2);
+			}
+		} else {
+			bfin_write_MDMA_D0_X_MODIFY(-1);
+			bfin_write_MDMA_S0_X_MODIFY(-1);
+			if (flag_2D) {
+				bfin_write_MDMA_D0_Y_MODIFY(-1);
+				bfin_write_MDMA_S0_Y_MODIFY(-1);
+			}
+		}
+	} else {
+		if (flag_align) {
+			bfin_write_MDMA_D0_X_MODIFY(2);
+			bfin_write_MDMA_S0_X_MODIFY(2);
+			if (flag_2D) {
+				bfin_write_MDMA_D0_Y_MODIFY(2);
+				bfin_write_MDMA_S0_Y_MODIFY(2);
+			}
+		} else {
+			bfin_write_MDMA_D0_X_MODIFY(1);
+			bfin_write_MDMA_S0_X_MODIFY(1);
+			if (flag_2D) {
+				bfin_write_MDMA_D0_Y_MODIFY(1);
+				bfin_write_MDMA_S0_Y_MODIFY(1);
+			}
+		}
+	}
+
+	/* Enable source DMA */
+	if (flag_2D) {
+		if (flag_align) {
+			bfin_write_MDMA_S0_CONFIG(DMAEN | DMA2D | WDSIZE_16);
+			bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | DMA2D | WDSIZE_16);
+		} else {
+			bfin_write_MDMA_S0_CONFIG(DMAEN | DMA2D);
+			bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | DMA2D);
+		}
+	} else {
+		if (flag_align) {
+			bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16);
+			bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_16);
+		} else {
+			bfin_write_MDMA_S0_CONFIG(DMAEN);
+			bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN);
+		}
+	}
+
+	while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE))
+		;
+
+	bfin_write_MDMA_D0_IRQ_STATUS(bfin_read_MDMA_D0_IRQ_STATUS() |
+				      (DMA_DONE | DMA_ERR));
+
+	bfin_write_MDMA_S0_CONFIG(0);
+	bfin_write_MDMA_D0_CONFIG(0);
+
+	if ((unsigned long)dest < memory_end)
+		blackfin_dcache_invalidate_range((unsigned int)dest,
+						 (unsigned int)(dest + size));
+
+	return dest;
+}
+EXPORT_SYMBOL(dma_memcpy);
+
+void *safe_dma_memcpy(void *dest, const void *src, size_t size)
+{
+	int flags = 0;
+	void *addr;
+	local_irq_save(flags);
+	addr = dma_memcpy(dest, src, size);
+	local_irq_restore(flags);
+	return addr;
+}
+EXPORT_SYMBOL(safe_dma_memcpy);
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
new file mode 100644
index 0000000..e9f24a9
--- /dev/null
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -0,0 +1,637 @@
+/*
+ * File:         arch/blackfin/kernel/bfin_gpio.c
+ * Based on:
+ * Author:       Michael Hennerich (hennerich@blackfin.uclinux.org)
+ *
+ * Created:
+ * Description:  GPIO Abstraction Layer
+ *
+ * Modified:
+ *               Copyright 2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+/*
+*  Number     BF537/6/4    BF561    BF533/2/1
+*
+*  GPIO_0       PF0         PF0        PF0
+*  GPIO_1       PF1         PF1        PF1
+*  GPIO_2       PF2         PF2        PF2
+*  GPIO_3       PF3         PF3        PF3
+*  GPIO_4       PF4         PF4        PF4
+*  GPIO_5       PF5         PF5        PF5
+*  GPIO_6       PF6         PF6        PF6
+*  GPIO_7       PF7         PF7        PF7
+*  GPIO_8       PF8         PF8        PF8
+*  GPIO_9       PF9         PF9        PF9
+*  GPIO_10      PF10        PF10       PF10
+*  GPIO_11      PF11        PF11       PF11
+*  GPIO_12      PF12        PF12       PF12
+*  GPIO_13      PF13        PF13       PF13
+*  GPIO_14      PF14        PF14       PF14
+*  GPIO_15      PF15        PF15       PF15
+*  GPIO_16      PG0         PF16
+*  GPIO_17      PG1         PF17
+*  GPIO_18      PG2         PF18
+*  GPIO_19      PG3         PF19
+*  GPIO_20      PG4         PF20
+*  GPIO_21      PG5         PF21
+*  GPIO_22      PG6         PF22
+*  GPIO_23      PG7         PF23
+*  GPIO_24      PG8         PF24
+*  GPIO_25      PG9         PF25
+*  GPIO_26      PG10        PF26
+*  GPIO_27      PG11        PF27
+*  GPIO_28      PG12        PF28
+*  GPIO_29      PG13        PF29
+*  GPIO_30      PG14        PF30
+*  GPIO_31      PG15        PF31
+*  GPIO_32      PH0         PF32
+*  GPIO_33      PH1         PF33
+*  GPIO_34      PH2         PF34
+*  GPIO_35      PH3         PF35
+*  GPIO_36      PH4         PF36
+*  GPIO_37      PH5         PF37
+*  GPIO_38      PH6         PF38
+*  GPIO_39      PH7         PF39
+*  GPIO_40      PH8         PF40
+*  GPIO_41      PH9         PF41
+*  GPIO_42      PH10        PF42
+*  GPIO_43      PH11        PF43
+*  GPIO_44      PH12        PF44
+*  GPIO_45      PH13        PF45
+*  GPIO_46      PH14        PF46
+*  GPIO_47      PH15        PF47
+*/
+
+#include <linux/module.h>
+#include <linux/err.h>
+#include <asm/blackfin.h>
+#include <asm/gpio.h>
+#include <linux/irq.h>
+
+#ifdef BF533_FAMILY
+static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
+	(struct gpio_port_t *) FIO_FLAG_D,
+};
+#endif
+
+#ifdef BF537_FAMILY
+static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
+	(struct gpio_port_t *) PORTFIO,
+	(struct gpio_port_t *) PORTGIO,
+	(struct gpio_port_t *) PORTHIO,
+};
+
+static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
+	(unsigned short *) PORTF_FER,
+	(unsigned short *) PORTG_FER,
+	(unsigned short *) PORTH_FER,
+};
+
+#endif
+
+#ifdef BF561_FAMILY
+static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
+	(struct gpio_port_t *) FIO0_FLAG_D,
+	(struct gpio_port_t *) FIO1_FLAG_D,
+	(struct gpio_port_t *) FIO2_FLAG_D,
+};
+#endif
+
+static unsigned short reserved_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
+
+#ifdef CONFIG_PM
+static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
+static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
+static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
+
+#ifdef BF533_FAMILY
+static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB};
+#endif
+
+#ifdef BF537_FAMILY
+static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
+#endif
+
+#ifdef BF561_FAMILY
+static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
+#endif
+
+#endif /* CONFIG_PM */
+
+inline int check_gpio(unsigned short gpio)
+{
+	if (gpio > MAX_BLACKFIN_GPIOS)
+		return -EINVAL;
+	return 0;
+}
+
+#ifdef BF537_FAMILY
+void port_setup(unsigned short gpio, unsigned short usage)
+{
+	if (usage == GPIO_USAGE) {
+		if (*port_fer[gpio_bank(gpio)] & gpio_bit(gpio))
+			printk(KERN_WARNING "bfin-gpio: Possible Conflict with Peripheral "
+			       "usage and GPIO %d detected!\n", gpio);
+		*port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
+	} else
+		*port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
+	SSYNC();
+}
+#else
+# define port_setup(...)  do { } while (0)
+#endif
+
+
+void default_gpio(unsigned short gpio)
+{
+	unsigned short bank,bitmask;
+
+	bank = gpio_bank(gpio);
+	bitmask = gpio_bit(gpio);
+
+	gpio_bankb[bank]->maska_clear = bitmask;
+	gpio_bankb[bank]->maskb_clear = bitmask;
+	SSYNC();
+	gpio_bankb[bank]->inen &= ~bitmask;
+	gpio_bankb[bank]->dir &= ~bitmask;
+	gpio_bankb[bank]->polar &= ~bitmask;
+	gpio_bankb[bank]->both &= ~bitmask;
+	gpio_bankb[bank]->edge &= ~bitmask;
+}
+
+
+int __init bfin_gpio_init(void)
+{
+	int i;
+
+	printk(KERN_INFO "Blackfin GPIO Controller\n");
+
+	for (i = 0; i < MAX_BLACKFIN_GPIOS; i+=GPIO_BANKSIZE)
+		reserved_map[gpio_bank(i)] = 0;
+
+#if defined(BF537_FAMILY) && (defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
+# if defined(CONFIG_BFIN_MAC_RMII)
+	reserved_map[PORT_H] = 0xC373;
+# else
+	reserved_map[PORT_H] = 0xFFFF;
+# endif
+#endif
+
+	return 0;
+}
+
+arch_initcall(bfin_gpio_init);
+
+
+/***********************************************************
+*
+* FUNCTIONS: Blackfin General Purpose Ports Access Functions
+*
+* INPUTS/OUTPUTS:
+* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
+*
+*
+* DESCRIPTION: These functions abstract direct register access
+*              to Blackfin processor General Purpose
+*              Ports Regsiters
+*
+* CAUTION: These functions do not belong to the GPIO Driver API
+*************************************************************
+* MODIFICATION HISTORY :
+**************************************************************/
+
+/* Set a specific bit */
+
+#define SET_GPIO(name) \
+void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
+{ \
+	unsigned long flags; \
+	BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
+	local_irq_save(flags); \
+	if (arg) \
+		gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
+	else \
+		gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
+	local_irq_restore(flags); \
+} \
+EXPORT_SYMBOL(set_gpio_ ## name);
+
+SET_GPIO(dir)
+SET_GPIO(inen)
+SET_GPIO(polar)
+SET_GPIO(edge)
+SET_GPIO(both)
+
+
+#define SET_GPIO_SC(name) \
+void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
+{ \
+	BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
+	if (arg) \
+		gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
+	else \
+		gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
+} \
+EXPORT_SYMBOL(set_gpio_ ## name);
+
+SET_GPIO_SC(maska)
+SET_GPIO_SC(maskb)
+
+#if defined(ANOMALY_05000311)
+void set_gpio_data(unsigned short gpio, unsigned short arg)
+{
+	unsigned long flags;
+	BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
+	local_irq_save(flags);
+	if (arg)
+		gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
+	else
+		gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
+	bfin_read_CHIPID();
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(set_gpio_data);
+#else
+SET_GPIO_SC(data)
+#endif
+
+
+#if defined(ANOMALY_05000311)
+void set_gpio_toggle(unsigned short gpio)
+{
+	unsigned long flags;
+	BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
+	local_irq_save(flags);
+	gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
+	bfin_read_CHIPID();
+	local_irq_restore(flags);
+}
+#else
+void set_gpio_toggle(unsigned short gpio)
+{
+	BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
+	gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
+}
+#endif
+EXPORT_SYMBOL(set_gpio_toggle);
+
+
+/*Set current PORT date (16-bit word)*/
+
+#define SET_GPIO_P(name) \
+void set_gpiop_ ## name(unsigned short gpio, unsigned short arg) \
+{ \
+	gpio_bankb[gpio_bank(gpio)]->name = arg; \
+} \
+EXPORT_SYMBOL(set_gpiop_ ## name);
+
+SET_GPIO_P(dir)
+SET_GPIO_P(inen)
+SET_GPIO_P(polar)
+SET_GPIO_P(edge)
+SET_GPIO_P(both)
+SET_GPIO_P(maska)
+SET_GPIO_P(maskb)
+
+
+#if defined(ANOMALY_05000311)
+void set_gpiop_data(unsigned short gpio, unsigned short arg)
+{
+	unsigned long flags;
+	local_irq_save(flags);
+	gpio_bankb[gpio_bank(gpio)]->data = arg;
+	bfin_read_CHIPID();
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(set_gpiop_data);
+#else
+SET_GPIO_P(data)
+#endif
+
+
+
+/* Get a specific bit */
+
+#define GET_GPIO(name) \
+unsigned short get_gpio_ ## name(unsigned short gpio) \
+{ \
+	return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
+} \
+EXPORT_SYMBOL(get_gpio_ ## name);
+
+GET_GPIO(dir)
+GET_GPIO(inen)
+GET_GPIO(polar)
+GET_GPIO(edge)
+GET_GPIO(both)
+GET_GPIO(maska)
+GET_GPIO(maskb)
+
+
+#if defined(ANOMALY_05000311)
+unsigned short get_gpio_data(unsigned short gpio)
+{
+	unsigned long flags;
+	unsigned short ret;
+	BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
+	local_irq_save(flags);
+	ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->data >> gpio_sub_n(gpio));
+	bfin_read_CHIPID();
+	local_irq_restore(flags);
+	return ret;
+}
+EXPORT_SYMBOL(get_gpio_data);
+#else
+GET_GPIO(data)
+#endif
+
+/*Get current PORT date (16-bit word)*/
+
+#define GET_GPIO_P(name) \
+unsigned short get_gpiop_ ## name(unsigned short gpio) \
+{ \
+	return (gpio_bankb[gpio_bank(gpio)]->name);\
+} \
+EXPORT_SYMBOL(get_gpiop_ ## name);
+
+GET_GPIO_P(dir)
+GET_GPIO_P(inen)
+GET_GPIO_P(polar)
+GET_GPIO_P(edge)
+GET_GPIO_P(both)
+GET_GPIO_P(maska)
+GET_GPIO_P(maskb)
+
+#if defined(ANOMALY_05000311)
+unsigned short get_gpiop_data(unsigned short gpio)
+{
+	unsigned long flags;
+	unsigned short ret;
+	local_irq_save(flags);
+	ret = gpio_bankb[gpio_bank(gpio)]->data;
+	bfin_read_CHIPID();
+	local_irq_restore(flags);
+	return ret;
+}
+EXPORT_SYMBOL(get_gpiop_data);
+#else
+GET_GPIO_P(data)
+#endif
+
+#ifdef CONFIG_PM
+/***********************************************************
+*
+* FUNCTIONS: Blackfin PM Setup API
+*
+* INPUTS/OUTPUTS:
+* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
+* type -
+*	PM_WAKE_RISING
+*	PM_WAKE_FALLING
+*	PM_WAKE_HIGH
+*	PM_WAKE_LOW
+*	PM_WAKE_BOTH_EDGES
+*
+* DESCRIPTION: Blackfin PM Driver API
+*
+* CAUTION:
+*************************************************************
+* MODIFICATION HISTORY :
+**************************************************************/
+int gpio_pm_wakeup_request(unsigned short gpio, unsigned char type)
+{
+	unsigned long flags;
+
+	if ((check_gpio(gpio) < 0) || !type)
+		return -EINVAL;
+
+	local_irq_save(flags);
+
+	wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
+	wakeup_flags_map[gpio] = type;
+	local_irq_restore(flags);
+
+	return 0;
+}
+EXPORT_SYMBOL(gpio_pm_wakeup_request);
+
+void gpio_pm_wakeup_free(unsigned short gpio)
+{
+	unsigned long flags;
+
+	if (check_gpio(gpio) < 0)
+		return;
+
+	local_irq_save(flags);
+
+	wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
+
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(gpio_pm_wakeup_free);
+
+static int bfin_gpio_wakeup_type(unsigned short gpio, unsigned char type)
+{
+	port_setup(gpio, GPIO_USAGE);
+	set_gpio_dir(gpio, 0);
+	set_gpio_inen(gpio, 1);
+
+	if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
+		set_gpio_edge(gpio, 1);
+	 else
+		set_gpio_edge(gpio, 0);
+
+	if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
+		set_gpio_both(gpio, 1);
+	else
+		set_gpio_both(gpio, 0);
+
+	if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
+		set_gpio_polar(gpio, 1);
+	else
+		set_gpio_polar(gpio, 0);
+
+	SSYNC();
+
+	return 0;
+}
+
+u32 gpio_pm_setup(void)
+{
+	u32 sic_iwr = 0;
+	u16 bank, mask, i, gpio;
+
+	for (i = 0; i < MAX_BLACKFIN_GPIOS; i+=GPIO_BANKSIZE) {
+		mask = wakeup_map[gpio_bank(i)];
+		bank = gpio_bank(i);
+
+		gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
+		gpio_bankb[bank]->maskb = 0;
+
+		if (mask) {
+#ifdef BF537_FAMILY
+			gpio_bank_saved[bank].fer   = *port_fer[bank];
+#endif
+			gpio_bank_saved[bank].inen  = gpio_bankb[bank]->inen;
+			gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
+			gpio_bank_saved[bank].dir   = gpio_bankb[bank]->dir;
+			gpio_bank_saved[bank].edge  = gpio_bankb[bank]->edge;
+			gpio_bank_saved[bank].both  = gpio_bankb[bank]->both;
+
+			gpio = i;
+
+			while (mask) {
+				if (mask & 1) {
+					bfin_gpio_wakeup_type(gpio, wakeup_flags_map[gpio]);
+					set_gpio_data(gpio, 0); /*Clear*/
+				}
+				gpio++;
+				mask >>= 1;
+			}
+
+			sic_iwr |= 1 << (sic_iwr_irqs[bank] - (IRQ_CORETMR + 1));
+			gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
+		}
+	}
+
+	if (sic_iwr)
+		return sic_iwr;
+	else
+		return IWR_ENABLE_ALL;
+}
+
+
+void gpio_pm_restore(void)
+{
+	u16 bank, mask, i;
+
+	for (i = 0; i < MAX_BLACKFIN_GPIOS; i+=GPIO_BANKSIZE) {
+		mask = wakeup_map[gpio_bank(i)];
+		bank = gpio_bank(i);
+
+		if (mask) {
+#ifdef BF537_FAMILY
+			*port_fer[bank]   	= gpio_bank_saved[bank].fer;
+#endif
+			gpio_bankb[bank]->inen  = gpio_bank_saved[bank].inen;
+			gpio_bankb[bank]->dir   = gpio_bank_saved[bank].dir;
+			gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
+			gpio_bankb[bank]->edge  = gpio_bank_saved[bank].edge;
+			gpio_bankb[bank]->both  = gpio_bank_saved[bank].both;
+		}
+
+		gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
+	}
+}
+
+#endif
+
+/***********************************************************
+*
+* FUNCTIONS: Blackfin GPIO Driver
+*
+* INPUTS/OUTPUTS:
+* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
+*
+*
+* DESCRIPTION: Blackfin GPIO Driver API
+*
+* CAUTION:
+*************************************************************
+* MODIFICATION HISTORY :
+**************************************************************/
+
+int gpio_request(unsigned short gpio, const char *label)
+{
+	unsigned long flags;
+
+	if (check_gpio(gpio) < 0)
+		return -EINVAL;
+
+	local_irq_save(flags);
+
+	if (unlikely(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
+		printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved!\n", gpio);
+		dump_stack();
+		local_irq_restore(flags);
+		return -EBUSY;
+	}
+	reserved_map[gpio_bank(gpio)] |= gpio_bit(gpio);
+
+	local_irq_restore(flags);
+
+	port_setup(gpio, GPIO_USAGE);
+
+	return 0;
+}
+EXPORT_SYMBOL(gpio_request);
+
+
+void gpio_free(unsigned short gpio)
+{
+	unsigned long flags;
+
+	if (check_gpio(gpio) < 0)
+		return;
+
+	local_irq_save(flags);
+
+	if (unlikely(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
+		printk(KERN_ERR "bfin-gpio: GPIO %d wasn't reserved!\n", gpio);
+		dump_stack();
+		local_irq_restore(flags);
+		return;
+	}
+
+	default_gpio(gpio);
+
+	reserved_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
+
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(gpio_free);
+
+
+void gpio_direction_input(unsigned short gpio)
+{
+	unsigned long flags;
+
+	BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
+
+	local_irq_save(flags);
+	gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
+	gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(gpio_direction_input);
+
+void gpio_direction_output(unsigned short gpio)
+{
+	unsigned long flags;
+
+	BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
+
+	local_irq_save(flags);
+	gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
+	gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(gpio_direction_output);
diff --git a/arch/blackfin/kernel/bfin_ksyms.c b/arch/blackfin/kernel/bfin_ksyms.c
new file mode 100644
index 0000000..f64ecb6
--- /dev/null
+++ b/arch/blackfin/kernel/bfin_ksyms.c
@@ -0,0 +1,119 @@
+/*
+ * File:         arch/blackfin/kernel/bfin_ksyms.c
+ * Based on:     none - original work
+ * Author:
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/module.h>
+#include <asm/irq.h>
+#include <asm/checksum.h>
+#include <asm/cacheflush.h>
+#include <asm/uaccess.h>
+
+/* platform dependent support */
+
+EXPORT_SYMBOL(__ioremap);
+EXPORT_SYMBOL(strcmp);
+EXPORT_SYMBOL(strncmp);
+EXPORT_SYMBOL(dump_thread);
+
+EXPORT_SYMBOL(ip_fast_csum);
+
+EXPORT_SYMBOL(kernel_thread);
+
+EXPORT_SYMBOL(__up);
+EXPORT_SYMBOL(__down);
+EXPORT_SYMBOL(__down_trylock);
+EXPORT_SYMBOL(__down_interruptible);
+
+EXPORT_SYMBOL(is_in_rom);
+
+/* Networking helper routines. */
+EXPORT_SYMBOL(csum_partial_copy);
+
+/* The following are special because they're not called
+ * explicitly (the C compiler generates them).  Fortunately,
+ * their interface isn't gonna change any time soon now, so
+ * it's OK to leave it out of version control.
+ */
+EXPORT_SYMBOL(memcpy);
+EXPORT_SYMBOL(memset);
+EXPORT_SYMBOL(memcmp);
+EXPORT_SYMBOL(memmove);
+EXPORT_SYMBOL(memchr);
+EXPORT_SYMBOL(get_wchan);
+
+/*
+ * libgcc functions - functions that are used internally by the
+ * compiler...  (prototypes are not correct though, but that
+ * doesn't really matter since they're not versioned).
+ */
+extern void __ashldi3(void);
+extern void __ashrdi3(void);
+extern void __smulsi3_highpart(void);
+extern void __umulsi3_highpart(void);
+extern void __divsi3(void);
+extern void __lshrdi3(void);
+extern void __modsi3(void);
+extern void __muldi3(void);
+extern void __udivsi3(void);
+extern void __umodsi3(void);
+
+/* gcc lib functions */
+EXPORT_SYMBOL(__ashldi3);
+EXPORT_SYMBOL(__ashrdi3);
+EXPORT_SYMBOL(__umulsi3_highpart);
+EXPORT_SYMBOL(__smulsi3_highpart);
+EXPORT_SYMBOL(__divsi3);
+EXPORT_SYMBOL(__lshrdi3);
+EXPORT_SYMBOL(__modsi3);
+EXPORT_SYMBOL(__muldi3);
+EXPORT_SYMBOL(__udivsi3);
+EXPORT_SYMBOL(__umodsi3);
+
+EXPORT_SYMBOL(outsb);
+EXPORT_SYMBOL(insb);
+EXPORT_SYMBOL(outsw);
+EXPORT_SYMBOL(insw);
+EXPORT_SYMBOL(outsl);
+EXPORT_SYMBOL(insl);
+EXPORT_SYMBOL(irq_flags);
+EXPORT_SYMBOL(iounmap);
+EXPORT_SYMBOL(blackfin_dcache_invalidate_range);
+EXPORT_SYMBOL(blackfin_icache_dcache_flush_range);
+EXPORT_SYMBOL(blackfin_icache_flush_range);
+EXPORT_SYMBOL(blackfin_dcache_flush_range);
+EXPORT_SYMBOL(blackfin_dflush_page);
+
+EXPORT_SYMBOL(csum_partial);
+EXPORT_SYMBOL(__init_begin);
+EXPORT_SYMBOL(__init_end);
+EXPORT_SYMBOL(_ebss_l1);
+EXPORT_SYMBOL(_stext_l1);
+EXPORT_SYMBOL(_etext_l1);
+EXPORT_SYMBOL(_sdata_l1);
+EXPORT_SYMBOL(_ebss_b_l1);
+EXPORT_SYMBOL(_sdata_b_l1);
diff --git a/arch/blackfin/kernel/dma-mapping.c b/arch/blackfin/kernel/dma-mapping.c
new file mode 100644
index 0000000..539eb24
--- /dev/null
+++ b/arch/blackfin/kernel/dma-mapping.c
@@ -0,0 +1,183 @@
+/*
+ * File:         arch/blackfin/kernel/dma-mapping.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:  Dynamic DMA mapping support.
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/bootmem.h>
+#include <linux/spinlock.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <asm/cacheflush.h>
+#include <asm/io.h>
+#include <asm/bfin-global.h>
+
+static spinlock_t dma_page_lock;
+static unsigned int *dma_page;
+static unsigned int dma_pages;
+static unsigned long dma_base;
+static unsigned long dma_size;
+static unsigned int dma_initialized;
+
+void dma_alloc_init(unsigned long start, unsigned long end)
+{
+	spin_lock_init(&dma_page_lock);
+	dma_initialized = 0;
+
+	dma_page = (unsigned int *)__get_free_page(GFP_KERNEL);
+	memset(dma_page, 0, PAGE_SIZE);
+	dma_base = PAGE_ALIGN(start);
+	dma_size = PAGE_ALIGN(end) - PAGE_ALIGN(start);
+	dma_pages = dma_size >> PAGE_SHIFT;
+	memset((void *)dma_base, 0, DMA_UNCACHED_REGION);
+	dma_initialized = 1;
+
+	printk(KERN_INFO "%s: dma_page @ 0x%p - %d pages at 0x%08lx\n", __FUNCTION__,
+	       dma_page, dma_pages, dma_base);
+}
+
+static inline unsigned int get_pages(size_t size)
+{
+	return ((size - 1) >> PAGE_SHIFT) + 1;
+}
+
+static unsigned long __alloc_dma_pages(unsigned int pages)
+{
+	unsigned long ret = 0, flags;
+	int i, count = 0;
+
+	if (dma_initialized == 0)
+		dma_alloc_init(_ramend - DMA_UNCACHED_REGION, _ramend);
+
+	spin_lock_irqsave(&dma_page_lock, flags);
+
+	for (i = 0; i < dma_pages;) {
+		if (dma_page[i++] == 0) {
+			if (++count == pages) {
+				while (count--)
+					dma_page[--i] = 1;
+				ret = dma_base + (i << PAGE_SHIFT);
+				break;
+			}
+		} else
+			count = 0;
+	}
+	spin_unlock_irqrestore(&dma_page_lock, flags);
+	return ret;
+}
+
+static void __free_dma_pages(unsigned long addr, unsigned int pages)
+{
+	unsigned long page = (addr - dma_base) >> PAGE_SHIFT;
+	unsigned long flags;
+	int i;
+
+	if ((page + pages) > dma_pages) {
+		printk(KERN_ERR "%s: freeing outside range.\n", __FUNCTION__);
+		BUG();
+	}
+
+	spin_lock_irqsave(&dma_page_lock, flags);
+	for (i = page; i < page + pages; i++) {
+		dma_page[i] = 0;
+	}
+	spin_unlock_irqrestore(&dma_page_lock, flags);
+}
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+			 dma_addr_t * dma_handle, gfp_t gfp)
+{
+	void *ret;
+
+	ret = (void *)__alloc_dma_pages(get_pages(size));
+
+	if (ret) {
+		memset(ret, 0, size);
+		*dma_handle = virt_to_phys(ret);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(dma_alloc_coherent);
+
+void
+dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+		  dma_addr_t dma_handle)
+{
+	__free_dma_pages((unsigned long)vaddr, get_pages(size));
+}
+EXPORT_SYMBOL(dma_free_coherent);
+
+/*
+ * Dummy functions defined for some existing drivers
+ */
+
+dma_addr_t
+dma_map_single(struct device *dev, void *ptr, size_t size,
+	       enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+
+	invalidate_dcache_range((unsigned long)ptr,
+			(unsigned long)ptr + size);
+
+	return (dma_addr_t) ptr;
+}
+EXPORT_SYMBOL(dma_map_single);
+
+int
+dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+	   enum dma_data_direction direction)
+{
+	int i;
+
+	BUG_ON(direction == DMA_NONE);
+
+	for (i = 0; i < nents; i++)
+		invalidate_dcache_range(sg_dma_address(&sg[i]),
+					sg_dma_address(&sg[i]) +
+					sg_dma_len(&sg[i]));
+
+	return nents;
+}
+EXPORT_SYMBOL(dma_map_sg);
+
+void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+		enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+EXPORT_SYMBOL(dma_unmap_single);
+
+void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+		int nhwentries, enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+EXPORT_SYMBOL(dma_unmap_sg);
diff --git a/arch/blackfin/kernel/dualcore_test.c b/arch/blackfin/kernel/dualcore_test.c
new file mode 100644
index 0000000..8b89c99
--- /dev/null
+++ b/arch/blackfin/kernel/dualcore_test.c
@@ -0,0 +1,49 @@
+/*
+ * File:         arch/blackfin/kernel/dualcore_test.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:  Small test code for CoreB on a BF561
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+
+static int *testarg = (int*)0xfeb00000;
+
+static int test_init(void)
+{
+	*testarg = 1;
+	printk("Dual core test module inserted: set testarg = [%d]\n @ [%p]\n",
+	       *testarg, testarg);
+	return 0;
+}
+
+static void test_exit(void)
+{
+	printk("Dual core test module removed: testarg = [%d]\n", *testarg);
+}
+
+module_init(test_init);
+module_exit(test_exit);
diff --git a/arch/blackfin/kernel/entry.S b/arch/blackfin/kernel/entry.S
new file mode 100644
index 0000000..5880b27
--- /dev/null
+++ b/arch/blackfin/kernel/entry.S
@@ -0,0 +1,94 @@
+/*
+ * File:         arch/blackfin/kernel/entry.S
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+#include <asm/errno.h>
+#include <asm/asm-offsets.h>
+
+#include <asm/mach-common/context.S>
+
+#ifdef CONFIG_EXCPT_IRQ_SYSC_L1
+.section .l1.text
+#else
+.text
+#endif
+
+ENTRY(_ret_from_fork)
+	SP += -12;
+	call _schedule_tail;
+	SP += 12;
+	r0 = [sp + PT_IPEND];
+	cc = bittst(r0,1);
+	if cc jump .Lin_kernel;
+	RESTORE_CONTEXT
+	rti;
+.Lin_kernel:
+	bitclr(r0,1);
+	[sp + PT_IPEND] = r0;
+	/* do a 'fake' RTI by jumping to [RETI]
+	 * to avoid clearing supervisor mode in child
+	*/
+	RESTORE_ALL_SYS
+	p0 = reti;
+	jump (p0);
+
+ENTRY(_sys_fork)
+	r0 = -EINVAL;
+	rts;
+
+ENTRY(_sys_vfork)
+	r0 = sp;
+	r0 += 24;
+	[--sp] = rets;
+	SP += -12;
+	call _bfin_vfork;
+	SP += 12;
+	rets = [sp++];
+	rts;
+
+ENTRY(_sys_clone)
+	r0 = sp;
+	r0 += 24;
+	[--sp] = rets;
+	SP += -12;
+	call _bfin_clone;
+	SP += 12;
+	rets = [sp++];
+	rts;
+
+ENTRY(_sys_rt_sigreturn)
+	r0 = sp;
+	r0 += 24;
+	[--sp] = rets;
+	SP += -12;
+	call _do_rt_sigreturn;
+	SP += 12;
+	rets = [sp++];
+	rts;
diff --git a/arch/blackfin/kernel/flat.c b/arch/blackfin/kernel/flat.c
new file mode 100644
index 0000000..a92587b
--- /dev/null
+++ b/arch/blackfin/kernel/flat.c
@@ -0,0 +1,101 @@
+/*
+ *  arch/blackfin/kernel/flat.c
+ *
+ *  Copyright (C) 2007 Analog Devices, Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/flat.h>
+
+#define FLAT_BFIN_RELOC_TYPE_16_BIT 0
+#define FLAT_BFIN_RELOC_TYPE_16H_BIT 1
+#define FLAT_BFIN_RELOC_TYPE_32_BIT 2
+
+unsigned long bfin_get_addr_from_rp(unsigned long *ptr,
+		unsigned long relval,
+		unsigned long flags,
+		unsigned long *persistent)
+{
+	unsigned short *usptr = (unsigned short *)ptr;
+	int type = (relval >> 26) & 7;
+	unsigned long val;
+
+	switch (type) {
+		case FLAT_BFIN_RELOC_TYPE_16_BIT:
+		case FLAT_BFIN_RELOC_TYPE_16H_BIT:
+			usptr = (unsigned short *)ptr;
+			pr_debug("*usptr = %x", get_unaligned(usptr));
+			val = get_unaligned(usptr);
+			val += *persistent;
+			break;
+
+		case FLAT_BFIN_RELOC_TYPE_32_BIT:
+			pr_debug("*ptr = %lx", get_unaligned(ptr));
+			val = get_unaligned(ptr);
+			break;
+
+		default:
+			pr_debug("BINFMT_FLAT: Unknown relocation type %x\n",
+				type);
+
+			return 0;
+	}
+
+	/*
+	 * Stack-relative relocs contain the offset into the stack, we
+	 * have to add the stack's start address here and return 1 from
+	 * flat_addr_absolute to prevent the normal address calculations
+	 */
+	if (relval & (1 << 29))
+		return val + current->mm->context.end_brk;
+
+	if ((flags & FLAT_FLAG_GOTPIC) == 0)
+		val = htonl(val);
+	return val;
+}
+EXPORT_SYMBOL(bfin_get_addr_from_rp);
+
+/*
+ * Insert the address ADDR into the symbol reference at RP;
+ * RELVAL is the raw relocation-table entry from which RP is derived
+ */
+void bfin_put_addr_at_rp(unsigned long *ptr, unsigned long addr,
+		unsigned long relval)
+{
+	unsigned short *usptr = (unsigned short *)ptr;
+	int type = (relval >> 26) & 7;
+
+	switch (type) {
+		case FLAT_BFIN_RELOC_TYPE_16_BIT:
+			put_unaligned(addr, usptr);
+			pr_debug("new value %x at %p", get_unaligned(usptr),
+				usptr);
+			break;
+
+		case FLAT_BFIN_RELOC_TYPE_16H_BIT:
+			put_unaligned(addr >> 16, usptr);
+			pr_debug("new value %x", get_unaligned(usptr));
+			break;
+
+		case FLAT_BFIN_RELOC_TYPE_32_BIT:
+			put_unaligned(addr, ptr);
+			pr_debug("new ptr =%lx", get_unaligned(ptr));
+			break;
+	}
+}
+EXPORT_SYMBOL(bfin_put_addr_at_rp);
diff --git a/arch/blackfin/kernel/init_task.c b/arch/blackfin/kernel/init_task.c
new file mode 100644
index 0000000..b45188f
--- /dev/null
+++ b/arch/blackfin/kernel/init_task.c
@@ -0,0 +1,60 @@
+/*
+ * File:         arch/blackfin/kernel/init_task.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:  This file contains the simple DMA Implementation for Blackfin
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/init_task.h>
+#include <linux/mqueue.h>
+
+static struct fs_struct init_fs = INIT_FS;
+static struct files_struct init_files = INIT_FILES;
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+
+struct mm_struct init_mm = INIT_MM(init_mm);
+EXPORT_SYMBOL(init_mm);
+
+/*
+ * Initial task structure.
+ *
+ * All other task structs will be allocated on slabs in fork.c
+ */
+struct task_struct init_task = INIT_TASK(init_task);
+EXPORT_SYMBOL(init_task);
+
+/*
+ * Initial thread structure.
+ *
+ * We need to make sure that this is 8192-byte aligned due to the
+ * way process stacks are handled. This is done by having a special
+ * "init_task" linker map entry.
+ */
+union thread_union init_thread_union
+    __attribute__ ((__section__(".data.init_task"))) = {
+INIT_THREAD_INFO(init_task)};
diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c
new file mode 100644
index 0000000..df5bf02
--- /dev/null
+++ b/arch/blackfin/kernel/irqchip.c
@@ -0,0 +1,147 @@
+/*
+ * File:         arch/blackfin/kernel/irqchip.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:  This file contains the simple DMA Implementation for Blackfin
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/kernel_stat.h>
+#include <linux/module.h>
+#include <linux/random.h>
+#include <linux/seq_file.h>
+#include <linux/kallsyms.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+static unsigned long irq_err_count;
+static spinlock_t irq_controller_lock;
+
+/*
+ * Dummy mask/unmask handler
+ */
+void dummy_mask_unmask_irq(unsigned int irq)
+{
+}
+
+void ack_bad_irq(unsigned int irq)
+{
+	irq_err_count += 1;
+	printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
+}
+EXPORT_SYMBOL(ack_bad_irq);
+
+static struct irq_chip bad_chip = {
+	.ack = dummy_mask_unmask_irq,
+	.mask = dummy_mask_unmask_irq,
+	.unmask = dummy_mask_unmask_irq,
+};
+
+static struct irq_desc bad_irq_desc = {
+	.chip = &bad_chip,
+	.handle_irq = handle_bad_irq,
+	.depth = 1,
+};
+
+int show_interrupts(struct seq_file *p, void *v)
+{
+	int i = *(loff_t *) v;
+	struct irqaction *action;
+	unsigned long flags;
+
+	if (i < NR_IRQS) {
+		spin_lock_irqsave(&irq_desc[i].lock, flags);
+		action = irq_desc[i].action;
+		if (!action)
+			goto unlock;
+
+		seq_printf(p, "%3d: %10u ", i, kstat_irqs(i));
+		seq_printf(p, "  %s", action->name);
+		for (action = action->next; action; action = action->next)
+			seq_printf(p, ", %s", action->name);
+
+		seq_putc(p, '\n');
+	      unlock:
+		spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+	} else if (i == NR_IRQS) {
+		seq_printf(p, "Err: %10lu\n", irq_err_count);
+	}
+	return 0;
+}
+
+/*
+ * do_IRQ handles all hardware IRQ's.  Decoded IRQs should not
+ * come via this function.  Instead, they should provide their
+ * own 'handler'
+ */
+
+#ifdef CONFIG_DO_IRQ_L1
+asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)__attribute__((l1_text));
+#endif
+
+asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
+{
+	struct pt_regs *old_regs;
+	struct irq_desc *desc = irq_desc + irq;
+	unsigned short pending, other_ints;
+
+	old_regs = set_irq_regs(regs);
+
+	/*
+	 * Some hardware gives randomly wrong interrupts.  Rather
+	 * than crashing, do something sensible.
+	 */
+	if (irq >= NR_IRQS)
+		desc = &bad_irq_desc;
+
+	irq_enter();
+
+	generic_handle_irq(irq);
+
+	/* If we're the only interrupt running (ignoring IRQ15 which is for
+	   syscalls), lower our priority to IRQ14 so that softirqs run at
+	   that level.  If there's another, lower-level interrupt, irq_exit
+	   will defer softirqs to that.  */
+	CSYNC();
+	pending = bfin_read_IPEND() & ~0x8000;
+	other_ints = pending & (pending - 1);
+	if (other_ints == 0)
+		lower_to_irq14();
+	irq_exit();
+
+	set_irq_regs(old_regs);
+}
+
+void __init init_IRQ(void)
+{
+	struct irq_desc *desc;
+	int irq;
+
+	spin_lock_init(&irq_controller_lock);
+	for (irq = 0, desc = irq_desc; irq < NR_IRQS; irq++, desc++) {
+		*desc = bad_irq_desc;
+	}
+
+	init_arch_irq();
+}
diff --git a/arch/blackfin/kernel/module.c b/arch/blackfin/kernel/module.c
new file mode 100644
index 0000000..372f756
--- /dev/null
+++ b/arch/blackfin/kernel/module.c
@@ -0,0 +1,429 @@
+/*
+ * File:         arch/blackfin/kernel/module.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+
+#include <linux/moduleloader.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <asm/dma.h>
+#include <asm/cacheflush.h>
+
+/*
+ * handle arithmetic relocations.
+ * See binutils/bfd/elf32-bfin.c for more details
+ */
+#define RELOC_STACK_SIZE 100
+static uint32_t reloc_stack[RELOC_STACK_SIZE];
+static unsigned int reloc_stack_tos;
+
+#define is_reloc_stack_empty() ((reloc_stack_tos > 0)?0:1)
+
+static void reloc_stack_push(uint32_t value)
+{
+	reloc_stack[reloc_stack_tos++] = value;
+}
+
+static uint32_t reloc_stack_pop(void)
+{
+	return reloc_stack[--reloc_stack_tos];
+}
+
+static uint32_t reloc_stack_operate(unsigned int oper, struct module *mod)
+{
+	uint32_t value;
+
+	switch (oper) {
+	case R_add:
+		value = reloc_stack[reloc_stack_tos - 2] +
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_sub:
+		value = reloc_stack[reloc_stack_tos - 2] -
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_mult:
+		value = reloc_stack[reloc_stack_tos - 2] *
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_div:
+		value = reloc_stack[reloc_stack_tos - 2] /
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_mod:
+		value = reloc_stack[reloc_stack_tos - 2] %
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_lshift:
+		value = reloc_stack[reloc_stack_tos - 2] <<
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_rshift:
+		value = reloc_stack[reloc_stack_tos - 2] >>
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_and:
+		value = reloc_stack[reloc_stack_tos - 2] &
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_or:
+		value = reloc_stack[reloc_stack_tos - 2] |
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_xor:
+		value = reloc_stack[reloc_stack_tos - 2] ^
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_land:
+		value = reloc_stack[reloc_stack_tos - 2] &&
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_lor:
+		value = reloc_stack[reloc_stack_tos - 2] ||
+			reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 2;
+		break;
+	case R_neg:
+		value = -reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos--;
+		break;
+	case R_comp:
+		value = ~reloc_stack[reloc_stack_tos - 1];
+		reloc_stack_tos -= 1;
+		break;
+	default:
+		printk(KERN_WARNING "module %s: unhandled reloction\n",
+				mod->name);
+		return 0;
+	}
+
+	/* now push the new value back on stack */
+	reloc_stack_push(value);
+
+	return value;
+}
+
+void *module_alloc(unsigned long size)
+{
+	if (size == 0)
+		return NULL;
+	return vmalloc(size);
+}
+
+/* Free memory returned from module_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+	vfree(module_region);
+}
+
+/* Transfer the section to the L1 memory */
+int
+module_frob_arch_sections(Elf_Ehdr * hdr, Elf_Shdr * sechdrs,
+			  char *secstrings, struct module *mod)
+{
+	Elf_Shdr *s, *sechdrs_end = sechdrs + hdr->e_shnum;
+	void *dest = NULL;
+
+	for (s = sechdrs; s < sechdrs_end; ++s) {
+		if ((strcmp(".l1.text", secstrings + s->sh_name) == 0) ||
+			((strcmp(".text", secstrings + s->sh_name)==0) &&
+			 (hdr->e_flags & FLG_CODE_IN_L1) && (s->sh_size > 0))) {
+			mod->arch.text_l1 = s;
+			dest = l1_inst_sram_alloc(s->sh_size);
+			if (dest == NULL) {
+				printk(KERN_ERR
+				       "module %s: L1 instruction memory allocation failed\n",
+				       mod->name);
+				return -1;
+			}
+			dma_memcpy(dest, (void *)s->sh_addr, s->sh_size);
+			s->sh_flags &= ~SHF_ALLOC;
+			s->sh_addr = (unsigned long)dest;
+		}
+		if ((strcmp(".l1.data", secstrings + s->sh_name) == 0)||
+			((strcmp(".data", secstrings + s->sh_name)==0) &&
+			 (hdr->e_flags & FLG_DATA_IN_L1) && (s->sh_size > 0))) {
+			mod->arch.data_a_l1 = s;
+			dest = l1_data_sram_alloc(s->sh_size);
+			if (dest == NULL) {
+				printk(KERN_ERR
+					"module %s: L1 data memory allocation failed\n",
+					mod->name);
+				return -1;
+			}
+			memcpy(dest, (void *)s->sh_addr, s->sh_size);
+			s->sh_flags &= ~SHF_ALLOC;
+			s->sh_addr = (unsigned long)dest;
+		}
+		if (strcmp(".l1.bss", secstrings + s->sh_name) == 0 ||
+			((strcmp(".bss", secstrings + s->sh_name)==0) &&
+			 (hdr->e_flags & FLG_DATA_IN_L1) && (s->sh_size > 0))) {
+			mod->arch.bss_a_l1 = s;
+			dest = l1_data_sram_alloc(s->sh_size);
+			if (dest == NULL) {
+				printk(KERN_ERR
+					"module %s: L1 data memory allocation failed\n",
+					mod->name);
+				return -1;
+			}
+			memset(dest, 0, s->sh_size);
+			s->sh_flags &= ~SHF_ALLOC;
+			s->sh_addr = (unsigned long)dest;
+		}
+		if (strcmp(".l1.data.B", secstrings + s->sh_name) == 0) {
+			mod->arch.data_b_l1 = s;
+			dest = l1_data_B_sram_alloc(s->sh_size);
+			if (dest == NULL) {
+				printk(KERN_ERR
+					"module %s: L1 data memory allocation failed\n",
+					mod->name);
+				return -1;
+			}
+			memcpy(dest, (void *)s->sh_addr, s->sh_size);
+			s->sh_flags &= ~SHF_ALLOC;
+			s->sh_addr = (unsigned long)dest;
+		}
+		if (strcmp(".l1.bss.B", secstrings + s->sh_name) == 0) {
+			mod->arch.bss_b_l1 = s;
+			dest = l1_data_B_sram_alloc(s->sh_size);
+			if (dest == NULL) {
+				printk(KERN_ERR
+					"module %s: L1 data memory allocation failed\n",
+					mod->name);
+				return -1;
+			}
+			memset(dest, 0, s->sh_size);
+			s->sh_flags &= ~SHF_ALLOC;
+			s->sh_addr = (unsigned long)dest;
+		}
+	}
+	return 0;
+}
+
+int
+apply_relocate(Elf_Shdr * sechdrs, const char *strtab,
+	       unsigned int symindex, unsigned int relsec, struct module *me)
+{
+	printk(KERN_ERR "module %s: .rel unsupported\n", me->name);
+	return -ENOEXEC;
+}
+
+/*************************************************************************/
+/* FUNCTION : apply_relocate_add                                         */
+/* ABSTRACT : Blackfin specific relocation handling for the loadable     */
+/*            modules. Modules are expected to be .o files.              */
+/*            Arithmetic relocations are handled.                        */
+/*            We do not expect LSETUP to be split and hence is not       */
+/*            handled.                                                   */
+/*            R_byte and R_byte2 are also not handled as the gas         */
+/*            does not generate it.                                      */
+/*************************************************************************/
+int
+apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab,
+		   unsigned int symindex, unsigned int relsec,
+		   struct module *mod)
+{
+	unsigned int i;
+	unsigned short tmp;
+	Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
+	Elf32_Sym *sym;
+	uint32_t *location32;
+	uint16_t *location16;
+	uint32_t value;
+
+	pr_debug("Applying relocate section %u to %u\n", relsec,
+	       sechdrs[relsec].sh_info);
+	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+		/* This is where to make the change */
+		location16 =
+		    (uint16_t *) (sechdrs[sechdrs[relsec].sh_info].sh_addr +
+				  rel[i].r_offset);
+		location32 = (uint32_t *) location16;
+		/* This is the symbol it is referring to. Note that all
+		   undefined symbols have been resolved. */
+		sym = (Elf32_Sym *) sechdrs[symindex].sh_addr
+		    + ELF32_R_SYM(rel[i].r_info);
+		if (is_reloc_stack_empty()) {
+			value = sym->st_value;
+		} else {
+			value = reloc_stack_pop();
+		}
+		value += rel[i].r_addend;
+		pr_debug("location is %x, value is %x type is %d \n",
+			 (unsigned int) location32, value,
+			 ELF32_R_TYPE(rel[i].r_info));
+
+		switch (ELF32_R_TYPE(rel[i].r_info)) {
+
+		case R_pcrel24:
+		case R_pcrel24_jump_l:
+			/* Add the value, subtract its postition */
+			location16 =
+			    (uint16_t *) (sechdrs[sechdrs[relsec].sh_info].
+					  sh_addr + rel[i].r_offset - 2);
+			location32 = (uint32_t *) location16;
+			value -= (uint32_t) location32;
+			value >>= 1;
+			pr_debug("value is %x, before %x-%x after %x-%x\n", value,
+			       *location16, *(location16 + 1),
+			       (*location16 & 0xff00) | (value >> 16 & 0x00ff),
+			       value & 0xffff);
+			*location16 =
+			    (*location16 & 0xff00) | (value >> 16 & 0x00ff);
+			*(location16 + 1) = value & 0xffff;
+			break;
+		case R_pcrel12_jump:
+		case R_pcrel12_jump_s:
+			value -= (uint32_t) location32;
+			value >>= 1;
+			*location16 = (value & 0xfff);
+			break;
+		case R_pcrel10:
+			value -= (uint32_t) location32;
+			value >>= 1;
+			*location16 = (value & 0x3ff);
+			break;
+		case R_luimm16:
+			pr_debug("before %x after %x\n", *location16,
+				       (value & 0xffff));
+			tmp = (value & 0xffff);
+			if((unsigned long)location16 >= L1_CODE_START) {
+				dma_memcpy(location16, &tmp, 2);
+			} else
+				*location16 = tmp;
+			break;
+		case R_huimm16:
+			pr_debug("before %x after %x\n", *location16,
+				       ((value >> 16) & 0xffff));
+			tmp = ((value >> 16) & 0xffff);
+			if((unsigned long)location16 >= L1_CODE_START) {
+				dma_memcpy(location16, &tmp, 2);
+			} else
+				*location16 = tmp;
+			break;
+		case R_rimm16:
+			*location16 = (value & 0xffff);
+			break;
+		case R_byte4_data:
+			pr_debug("before %x after %x\n", *location32, value);
+			*location32 = value;
+			break;
+		case R_push:
+			reloc_stack_push(value);
+			break;
+		case R_const:
+			reloc_stack_push(rel[i].r_addend);
+			break;
+		case R_add:
+		case R_sub:
+		case R_mult:
+		case R_div:
+		case R_mod:
+		case R_lshift:
+		case R_rshift:
+		case R_and:
+		case R_or:
+		case R_xor:
+		case R_land:
+		case R_lor:
+		case R_neg:
+		case R_comp:
+			reloc_stack_operate(ELF32_R_TYPE(rel[i].r_info), mod);
+			break;
+		default:
+			printk(KERN_ERR "module %s: Unknown relocation: %u\n",
+			       mod->name, ELF32_R_TYPE(rel[i].r_info));
+			return -ENOEXEC;
+		}
+	}
+	return 0;
+}
+
+int
+module_finalize(const Elf_Ehdr * hdr,
+		const Elf_Shdr * sechdrs, struct module *mod)
+{
+	unsigned int i, strindex = 0, symindex = 0;
+	char *secstrings;
+
+	secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+
+	for (i = 1; i < hdr->e_shnum; i++) {
+		/* Internal symbols and strings. */
+		if (sechdrs[i].sh_type == SHT_SYMTAB) {
+			symindex = i;
+			strindex = sechdrs[i].sh_link;
+		}
+	}
+
+	for (i = 1; i < hdr->e_shnum; i++) {
+		const char *strtab = (char *)sechdrs[strindex].sh_addr;
+		unsigned int info = sechdrs[i].sh_info;
+
+		/* Not a valid relocation section? */
+		if (info >= hdr->e_shnum)
+			continue;
+
+		if ((sechdrs[i].sh_type == SHT_RELA) &&
+		    ((strcmp(".rela.l1.text", secstrings + sechdrs[i].sh_name) == 0)||
+			((strcmp(".rela.text", secstrings + sechdrs[i].sh_name) == 0) &&
+			 (hdr->e_flags & FLG_CODE_IN_L1)))) {
+			apply_relocate_add((Elf_Shdr *) sechdrs, strtab,
+					   symindex, i, mod);
+		}
+	}
+	return 0;
+}
+
+void module_arch_cleanup(struct module *mod)
+{
+	if ((mod->arch.text_l1) && (mod->arch.text_l1->sh_addr))
+		l1_inst_sram_free((void*)mod->arch.text_l1->sh_addr);
+	if ((mod->arch.data_a_l1) && (mod->arch.data_a_l1->sh_addr))
+		l1_data_sram_free((void*)mod->arch.data_a_l1->sh_addr);
+	if ((mod->arch.bss_a_l1) && (mod->arch.bss_a_l1->sh_addr))
+		l1_data_sram_free((void*)mod->arch.bss_a_l1->sh_addr);
+	if ((mod->arch.data_b_l1) && (mod->arch.data_b_l1->sh_addr))
+		l1_data_B_sram_free((void*)mod->arch.data_b_l1->sh_addr);
+	if ((mod->arch.bss_b_l1) && (mod->arch.bss_b_l1->sh_addr))
+		l1_data_B_sram_free((void*)mod->arch.bss_b_l1->sh_addr);
+}
diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
new file mode 100644
index 0000000..3eff743
--- /dev/null
+++ b/arch/blackfin/kernel/process.c
@@ -0,0 +1,394 @@
+/*
+ * File:         arch/blackfin/kernel/process.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:  Blackfin architecture-dependent process handling.
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/module.h>
+#include <linux/smp_lock.h>
+#include <linux/unistd.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+
+#include <asm/blackfin.h>
+#include <asm/uaccess.h>
+
+#define	LED_ON	0
+#define	LED_OFF	1
+
+asmlinkage void ret_from_fork(void);
+
+/* Points to the SDRAM backup memory for the stack that is currently in
+ * L1 scratchpad memory.
+ */
+void *current_l1_stack_save;
+
+/* The number of tasks currently using a L1 stack area.  The SRAM is
+ * allocated/deallocated whenever this changes from/to zero.
+ */
+int nr_l1stack_tasks;
+
+/* Start and length of the area in L1 scratchpad memory which we've allocated
+ * for process stacks.
+ */
+void *l1_stack_base;
+unsigned long l1_stack_len;
+
+/*
+ * Powermanagement idle function, if any..
+ */
+void (*pm_idle)(void) = NULL;
+EXPORT_SYMBOL(pm_idle);
+
+void (*pm_power_off)(void) = NULL;
+EXPORT_SYMBOL(pm_power_off);
+
+/*
+ * We are using a different LED from the one used to indicate timer interrupt.
+ */
+#if defined(CONFIG_BFIN_IDLE_LED)
+static inline void leds_switch(int flag)
+{
+	unsigned short tmp = 0;
+
+	tmp = bfin_read_CONFIG_BFIN_IDLE_LED_PORT();
+	SSYNC();
+
+	if (flag == LED_ON)
+		tmp &= ~CONFIG_BFIN_IDLE_LED_PIN;	/* light on */
+	else
+		tmp |= CONFIG_BFIN_IDLE_LED_PIN;	/* light off */
+
+	bfin_write_CONFIG_BFIN_IDLE_LED_PORT(tmp);
+	SSYNC();
+
+}
+#else
+static inline void leds_switch(int flag)
+{
+}
+#endif
+
+/*
+ * The idle loop on BFIN
+ */
+#ifdef CONFIG_IDLE_L1
+void default_idle(void)__attribute__((l1_text));
+void cpu_idle(void)__attribute__((l1_text));
+#endif
+
+void default_idle(void)
+{
+	while (!need_resched()) {
+		leds_switch(LED_OFF);
+		local_irq_disable();
+		if (likely(!need_resched()))
+			idle_with_irq_disabled();
+		local_irq_enable();
+		leds_switch(LED_ON);
+	}
+}
+
+void (*idle)(void) = default_idle;
+
+/*
+ * The idle thread. There's no useful work to be
+ * done, so just try to conserve power and have a
+ * low exit latency (ie sit in a loop waiting for
+ * somebody to say that they'd like to reschedule)
+ */
+void cpu_idle(void)
+{
+	/* endless idle loop with no priority at all */
+	while (1) {
+		idle();
+		preempt_enable_no_resched();
+		schedule();
+		preempt_disable();
+	}
+}
+
+void machine_restart(char *__unused)
+{
+#if defined(CONFIG_BLKFIN_CACHE)
+	bfin_write_IMEM_CONTROL(0x01);
+	SSYNC();
+#endif
+	bfin_reset();
+	/* Dont do anything till the reset occurs */
+	while (1) {
+		SSYNC();
+	}
+}
+
+void machine_halt(void)
+{
+	for (;;)
+		asm volatile ("idle");
+}
+
+void machine_power_off(void)
+{
+	for (;;)
+		asm volatile ("idle");
+}
+
+void show_regs(struct pt_regs *regs)
+{
+	printk(KERN_NOTICE "\n");
+	printk(KERN_NOTICE
+	       "PC: %08lu  Status: %04lu  SysStatus: %04lu  RETS: %08lu\n",
+	       regs->pc, regs->astat, regs->seqstat, regs->rets);
+	printk(KERN_NOTICE
+	       "A0.x: %08lx  A0.w: %08lx  A1.x: %08lx  A1.w: %08lx\n",
+	       regs->a0x, regs->a0w, regs->a1x, regs->a1w);
+	printk(KERN_NOTICE "P0: %08lx  P1: %08lx  P2: %08lx  P3: %08lx\n",
+	       regs->p0, regs->p1, regs->p2, regs->p3);
+	printk(KERN_NOTICE "P4: %08lx  P5: %08lx\n", regs->p4, regs->p5);
+	printk(KERN_NOTICE "R0: %08lx  R1: %08lx  R2: %08lx  R3: %08lx\n",
+	       regs->r0, regs->r1, regs->r2, regs->r3);
+	printk(KERN_NOTICE "R4: %08lx  R5: %08lx  R6: %08lx  R7: %08lx\n",
+	       regs->r4, regs->r5, regs->r6, regs->r7);
+
+	if (!(regs->ipend))
+		printk("USP: %08lx\n", rdusp());
+}
+
+/* Fill in the fpu structure for a core dump.  */
+
+int dump_fpu(struct pt_regs *regs, elf_fpregset_t * fpregs)
+{
+	return 1;
+}
+
+/*
+ * This gets run with P1 containing the
+ * function to call, and R1 containing
+ * the "args".  Note P0 is clobbered on the way here.
+ */
+void kernel_thread_helper(void);
+__asm__(".section .text\n"
+	".align 4\n"
+	"_kernel_thread_helper:\n\t"
+	"\tsp += -12;\n\t"
+	"\tr0 = r1;\n\t" "\tcall (p1);\n\t" "\tcall _do_exit;\n" ".previous");
+
+/*
+ * Create a kernel thread.
+ */
+pid_t kernel_thread(int (*fn) (void *), void *arg, unsigned long flags)
+{
+	struct pt_regs regs;
+
+	memset(&regs, 0, sizeof(regs));
+
+	regs.r1 = (unsigned long)arg;
+	regs.p1 = (unsigned long)fn;
+	regs.pc = (unsigned long)kernel_thread_helper;
+	regs.orig_p0 = -1;
+	/* Set bit 2 to tell ret_from_fork we should be returning to kernel
+	   mode.  */
+	regs.ipend = 0x8002;
+	__asm__ __volatile__("%0 = syscfg;":"=da"(regs.syscfg):);
+	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL,
+		       NULL);
+}
+
+void flush_thread(void)
+{
+}
+
+asmlinkage int bfin_vfork(struct pt_regs *regs)
+{
+	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL,
+		       NULL);
+}
+
+asmlinkage int bfin_clone(struct pt_regs *regs)
+{
+	unsigned long clone_flags;
+	unsigned long newsp;
+
+	/* syscall2 puts clone_flags in r0 and usp in r1 */
+	clone_flags = regs->r0;
+	newsp = regs->r1;
+	if (!newsp)
+		newsp = rdusp();
+	else
+		newsp -= 12;
+	return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
+}
+
+int
+copy_thread(int nr, unsigned long clone_flags,
+	    unsigned long usp, unsigned long topstk,
+	    struct task_struct *p, struct pt_regs *regs)
+{
+	struct pt_regs *childregs;
+
+	childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
+	*childregs = *regs;
+	childregs->r0 = 0;
+
+	p->thread.usp = usp;
+	p->thread.ksp = (unsigned long)childregs;
+	p->thread.pc = (unsigned long)ret_from_fork;
+
+	return 0;
+}
+
+/*
+ * fill in the user structure for a core dump..
+ */
+void dump_thread(struct pt_regs *regs, struct user *dump)
+{
+	dump->magic = CMAGIC;
+	dump->start_code = 0;
+	dump->start_stack = rdusp() & ~(PAGE_SIZE - 1);
+	dump->u_tsize = ((unsigned long)current->mm->end_code) >> PAGE_SHIFT;
+	dump->u_dsize = ((unsigned long)(current->mm->brk +
+					 (PAGE_SIZE - 1))) >> PAGE_SHIFT;
+	dump->u_dsize -= dump->u_tsize;
+	dump->u_ssize = 0;
+
+	if (dump->start_stack < TASK_SIZE)
+		dump->u_ssize =
+		    ((unsigned long)(TASK_SIZE -
+				     dump->start_stack)) >> PAGE_SHIFT;
+
+	dump->u_ar0 = (struct user_regs_struct *)((int)&dump->regs - (int)dump);
+
+	dump->regs.r0 = regs->r0;
+	dump->regs.r1 = regs->r1;
+	dump->regs.r2 = regs->r2;
+	dump->regs.r3 = regs->r3;
+	dump->regs.r4 = regs->r4;
+	dump->regs.r5 = regs->r5;
+	dump->regs.r6 = regs->r6;
+	dump->regs.r7 = regs->r7;
+	dump->regs.p0 = regs->p0;
+	dump->regs.p1 = regs->p1;
+	dump->regs.p2 = regs->p2;
+	dump->regs.p3 = regs->p3;
+	dump->regs.p4 = regs->p4;
+	dump->regs.p5 = regs->p5;
+	dump->regs.orig_p0 = regs->orig_p0;
+	dump->regs.a0w = regs->a0w;
+	dump->regs.a1w = regs->a1w;
+	dump->regs.a0x = regs->a0x;
+	dump->regs.a1x = regs->a1x;
+	dump->regs.rets = regs->rets;
+	dump->regs.astat = regs->astat;
+	dump->regs.pc = regs->pc;
+}
+
+/*
+ * sys_execve() executes a new program.
+ */
+
+asmlinkage int sys_execve(char *name, char **argv, char **envp)
+{
+	int error;
+	char *filename;
+	struct pt_regs *regs = (struct pt_regs *)((&name) + 6);
+
+	lock_kernel();
+	filename = getname(name);
+	error = PTR_ERR(filename);
+	if (IS_ERR(filename))
+		goto out;
+	error = do_execve(filename, argv, envp, regs);
+	putname(filename);
+      out:
+	unlock_kernel();
+	return error;
+}
+
+unsigned long get_wchan(struct task_struct *p)
+{
+	unsigned long fp, pc;
+	unsigned long stack_page;
+	int count = 0;
+	if (!p || p == current || p->state == TASK_RUNNING)
+		return 0;
+
+	stack_page = (unsigned long)p;
+	fp = p->thread.usp;
+	do {
+		if (fp < stack_page + sizeof(struct thread_info) ||
+		    fp >= 8184 + stack_page)
+			return 0;
+		pc = ((unsigned long *)fp)[1];
+		if (!in_sched_functions(pc))
+			return pc;
+		fp = *(unsigned long *)fp;
+	}
+	while (count++ < 16);
+	return 0;
+}
+
+#if defined(CONFIG_ACCESS_CHECK)
+int _access_ok(unsigned long addr, unsigned long size)
+{
+
+	if (addr > (addr + size))
+		return 0;
+	if (segment_eq(get_fs(),KERNEL_DS))
+		return 1;
+#ifdef CONFIG_MTD_UCLINUX
+	if (addr >= memory_start && (addr + size) <= memory_end)
+		return 1;
+	if (addr >= memory_mtd_end && (addr + size) <= physical_mem_end)
+		return 1;
+#else
+	if (addr >= memory_start && (addr + size) <= physical_mem_end)
+		return 1;
+#endif
+	if (addr >= (unsigned long)__init_begin &&
+	    addr + size <= (unsigned long)__init_end)
+		return 1;
+	if (addr >= L1_SCRATCH_START
+	    && addr + size <= L1_SCRATCH_START + L1_SCRATCH_LENGTH)
+		return 1;
+#if L1_CODE_LENGTH != 0
+	if (addr >= L1_CODE_START + (_etext_l1 - _stext_l1)
+	    && addr + size <= L1_CODE_START + L1_CODE_LENGTH)
+		return 1;
+#endif
+#if L1_DATA_A_LENGTH != 0
+	if (addr >= L1_DATA_A_START + (_ebss_l1 - _sdata_l1)
+	    && addr + size <= L1_DATA_A_START + L1_DATA_A_LENGTH)
+		return 1;
+#endif
+#if L1_DATA_B_LENGTH != 0
+	if (addr >= L1_DATA_B_START
+	    && addr + size <= L1_DATA_B_START + L1_DATA_B_LENGTH)
+		return 1;
+#endif
+	return 0;
+}
+EXPORT_SYMBOL(_access_ok);
+#endif /* CONFIG_ACCESS_CHECK */
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
new file mode 100644
index 0000000..d7c8e51
--- /dev/null
+++ b/arch/blackfin/kernel/ptrace.c
@@ -0,0 +1,430 @@
+/*
+ * File:         arch/blackfin/kernel/ptrace.c
+ * Based on:     Taken from linux/kernel/ptrace.c
+ * Author:       linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
+ *
+ * Created:      1/23/92
+ * Description:
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/errno.h>
+#include <linux/ptrace.h>
+#include <linux/user.h>
+#include <linux/signal.h>
+
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/processor.h>
+#include <asm/asm-offsets.h>
+#include <asm/dma.h>
+
+#define MAX_SHARED_LIBS 3
+#define TEXT_OFFSET 0
+/*
+ * does not yet catch signals sent when the child dies.
+ * in exit.c or in signal.c.
+ */
+
+/* determines which bits in the SYSCFG reg the user has access to. */
+/* 1 = access 0 = no access */
+#define SYSCFG_MASK 0x0007	/* SYSCFG reg */
+/* sets the trace bits. */
+#define TRACE_BITS 0x0001
+
+/* Find the stack offset for a register, relative to thread.esp0. */
+#define PT_REG(reg)	((long)&((struct pt_regs *)0)->reg)
+
+/*
+ * Get the address of the live pt_regs for the specified task.
+ * These are saved onto the top kernel stack when the process
+ * is not running.
+ *
+ * Note: if a user thread is execve'd from kernel space, the
+ * kernel stack will not be empty on entry to the kernel, so
+ * ptracing these tasks will fail.
+ */
+static inline struct pt_regs *get_user_regs(struct task_struct *task)
+{
+	return (struct pt_regs *)
+	    ((unsigned long)task->thread_info +
+	     (THREAD_SIZE - sizeof(struct pt_regs)));
+}
+
+/*
+ * Get all user integer registers.
+ */
+static inline int ptrace_getregs(struct task_struct *tsk, void __user * uregs)
+{
+	struct pt_regs *regs = get_user_regs(tsk);
+	return copy_to_user(uregs, regs, sizeof(struct pt_regs)) ? -EFAULT : 0;
+}
+
+/* Mapping from PT_xxx to the stack offset at which the register is
+ * saved.  Notice that usp has no stack-slot and needs to be treated
+ * specially (see get_reg/put_reg below).
+ */
+
+/*
+ * Get contents of register REGNO in task TASK.
+ */
+static inline long get_reg(struct task_struct *task, int regno)
+{
+	unsigned char *reg_ptr;
+
+	struct pt_regs *regs =
+	    (struct pt_regs *)((unsigned long)task->thread_info +
+			       (THREAD_SIZE - sizeof(struct pt_regs)));
+	reg_ptr = (char *)regs;
+
+	switch (regno) {
+	case PT_USP:
+		return task->thread.usp;
+	default:
+		if (regno <= 216)
+			return *(long *)(reg_ptr + regno);
+	}
+	/* slight mystery ... never seems to come here but kernel misbehaves without this code! */
+
+	printk(KERN_WARNING "Request to get for unknown register %d\n", regno);
+	return 0;
+}
+
+/*
+ * Write contents of register REGNO in task TASK.
+ */
+static inline int
+put_reg(struct task_struct *task, int regno, unsigned long data)
+{
+	char * reg_ptr;
+
+	struct pt_regs *regs =
+	    (struct pt_regs *)((unsigned long)task->thread_info +
+			       (THREAD_SIZE - sizeof(struct pt_regs)));
+	reg_ptr = (char *)regs;
+
+	switch (regno) {
+	case PT_PC:
+		/*********************************************************************/
+		/* At this point the kernel is most likely in exception.             */
+		/* The RETX register will be used to populate the pc of the process. */
+		/*********************************************************************/
+		regs->retx = data;
+		regs->pc = data;
+		break;
+	case PT_RETX:
+		break;		/* regs->retx = data; break; */
+	case PT_USP:
+		regs->usp = data;
+		task->thread.usp = data;
+		break;
+	default:
+		if (regno <= 216)
+		        *(long *)(reg_ptr + regno) = data;
+	}
+	return 0;
+}
+
+/*
+ * check that an address falls within the bounds of the target process's memory mappings
+ */
+static inline int is_user_addr_valid(struct task_struct *child,
+				     unsigned long start, unsigned long len)
+{
+	struct vm_list_struct *vml;
+	struct sram_list_struct *sraml;
+
+	for (vml = child->mm->context.vmlist; vml; vml = vml->next)
+		if (start >= vml->vma->vm_start && start + len <= vml->vma->vm_end)
+			return 0;
+
+	for (sraml = child->mm->context.sram_list; sraml; sraml = sraml->next)
+		if (start >= (unsigned long)sraml->addr
+		    && start + len <= (unsigned long)sraml->addr + sraml->length)
+			return 0;
+
+	return -EIO;
+}
+
+/*
+ * Called by kernel/ptrace.c when detaching..
+ *
+ * Make sure the single step bit is not set.
+ */
+void ptrace_disable(struct task_struct *child)
+{
+	unsigned long tmp;
+	/* make sure the single step bit is not set. */
+	tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
+	put_reg(child, PT_SR, tmp);
+}
+
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
+{
+	int ret;
+	int add = 0;
+
+	switch (request) {
+		/* when I and D space are separate, these will need to be fixed. */
+	case PTRACE_PEEKDATA:
+		pr_debug("ptrace: PEEKDATA\n");
+		add = MAX_SHARED_LIBS * 4;	/* space between text and data */
+		/* fall through */
+	case PTRACE_PEEKTEXT:	/* read word at location addr. */
+		{
+			unsigned long tmp = 0;
+			int copied;
+
+			ret = -EIO;
+			pr_debug("ptrace: PEEKTEXT at addr 0x%08lx + add %d %ld\n", addr, add,
+			         sizeof(data));
+			if (is_user_addr_valid(child, addr + add, sizeof(tmp)) < 0)
+				break;
+			pr_debug("ptrace: user address is valid\n");
+
+#if L1_CODE_LENGTH != 0
+			if (addr + add >= L1_CODE_START
+			    && addr + add + sizeof(tmp) <= L1_CODE_START + L1_CODE_LENGTH) {
+				safe_dma_memcpy (&tmp, (const void *)(addr + add), sizeof(tmp));
+				copied = sizeof(tmp);
+			} else
+#endif
+			copied =
+			    access_process_vm(child, addr + add, &tmp,
+					      sizeof(tmp), 0);
+			pr_debug("ptrace: copied size %d [0x%08lx]\n", copied, tmp);
+			if (copied != sizeof(tmp))
+				break;
+			ret = put_user(tmp, (unsigned long *)data);
+			break;
+		}
+
+		/* read the word at location addr in the USER area. */
+	case PTRACE_PEEKUSR:
+		{
+			unsigned long tmp;
+			ret = -EIO;
+			tmp = 0;
+			if ((addr & 3) || (addr > (sizeof(struct pt_regs) + 16))) {
+				printk(KERN_WARNING "ptrace error : PEEKUSR : temporarily returning "
+				                    "0 - %x sizeof(pt_regs) is %lx\n",
+				     (int)addr, sizeof(struct pt_regs));
+				break;
+			}
+			if (addr == sizeof(struct pt_regs)) {
+				/* PT_TEXT_ADDR */
+				tmp = child->mm->start_code + TEXT_OFFSET;
+			} else if (addr == (sizeof(struct pt_regs) + 4)) {
+				/* PT_TEXT_END_ADDR */
+				tmp = child->mm->end_code;
+			} else if (addr == (sizeof(struct pt_regs) + 8)) {
+				/* PT_DATA_ADDR */
+				tmp = child->mm->start_data;
+#ifdef CONFIG_BINFMT_ELF_FDPIC
+			} else if (addr == (sizeof(struct pt_regs) + 12)) {
+				tmp = child->mm->context.exec_fdpic_loadmap;
+			} else if (addr == (sizeof(struct pt_regs) + 16)) {
+				tmp = child->mm->context.interp_fdpic_loadmap;
+#endif
+			} else {
+				tmp = get_reg(child, addr);
+			}
+			ret = put_user(tmp, (unsigned long *)data);
+			break;
+		}
+
+		/* when I and D space are separate, this will have to be fixed. */
+	case PTRACE_POKEDATA:
+		printk(KERN_NOTICE "ptrace: PTRACE_PEEKDATA\n");
+		/* fall through */
+	case PTRACE_POKETEXT:	/* write the word at location addr. */
+		{
+			int copied;
+
+			ret = -EIO;
+			pr_debug("ptrace: POKETEXT at addr 0x%08lx + add %d %ld bytes %lx\n",
+			         addr, add, sizeof(data), data);
+			if (is_user_addr_valid(child, addr + add, sizeof(data)) < 0)
+				break;
+			pr_debug("ptrace: user address is valid\n");
+
+#if L1_CODE_LENGTH != 0
+			if (addr + add >= L1_CODE_START
+			    && addr + add + sizeof(data) <= L1_CODE_START + L1_CODE_LENGTH) {
+				safe_dma_memcpy ((void *)(addr + add), &data, sizeof(data));
+				copied = sizeof(data);
+			} else
+#endif
+			copied =
+			    access_process_vm(child, addr + add, &data,
+					      sizeof(data), 1);
+			pr_debug("ptrace: copied size %d\n", copied);
+			if (copied != sizeof(data))
+				break;
+			ret = 0;
+			break;
+		}
+
+	case PTRACE_POKEUSR:	/* write the word at location addr in the USER area */
+		ret = -EIO;
+		if ((addr & 3) || (addr > (sizeof(struct pt_regs) + 16))) {
+			printk(KERN_WARNING "ptrace error : POKEUSR: temporarily returning 0\n");
+			break;
+		}
+
+		if (addr >= (sizeof(struct pt_regs))) {
+			ret = 0;
+			break;
+		}
+		if (addr == PT_SYSCFG) {
+			data &= SYSCFG_MASK;
+			data |= get_reg(child, PT_SYSCFG);
+		}
+		ret = put_reg(child, addr, data);
+		break;
+
+	case PTRACE_SYSCALL:	/* continue and stop at next (return from) syscall */
+	case PTRACE_CONT:
+		{		/* restart after signal. */
+			long tmp;
+
+			pr_debug("ptrace_cont\n");
+
+			ret = -EIO;
+			if (!valid_signal(data))
+				break;
+			if (request == PTRACE_SYSCALL)
+				set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+			else
+				clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+
+			child->exit_code = data;
+			/* make sure the single step bit is not set. */
+			tmp = get_reg(child, PT_SYSCFG) & ~(TRACE_BITS);
+			put_reg(child, PT_SYSCFG, tmp);
+			pr_debug("before wake_up_process\n");
+			wake_up_process(child);
+			ret = 0;
+			break;
+		}
+
+	/*
+	 * make the child exit.  Best I can do is send it a sigkill.
+	 * perhaps it should be put in the status that it wants to
+	 * exit.
+	 */
+	case PTRACE_KILL:
+		{
+			long tmp;
+			ret = 0;
+			if (child->exit_state == EXIT_ZOMBIE)	/* already dead */
+				break;
+			child->exit_code = SIGKILL;
+			/* make sure the single step bit is not set. */
+			tmp = get_reg(child, PT_SYSCFG) & ~(TRACE_BITS);
+			put_reg(child, PT_SYSCFG, tmp);
+			wake_up_process(child);
+			break;
+		}
+
+	case PTRACE_SINGLESTEP:
+		{		/* set the trap flag. */
+			long tmp;
+
+			pr_debug("single step\n");
+			ret = -EIO;
+			if (!valid_signal(data))
+				break;
+			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+
+			tmp = get_reg(child, PT_SYSCFG) | (TRACE_BITS);
+			put_reg(child, PT_SYSCFG, tmp);
+
+			child->exit_code = data;
+			/* give it a chance to run. */
+			wake_up_process(child);
+			ret = 0;
+			break;
+		}
+
+	case PTRACE_DETACH:
+		{		/* detach a process that was attached. */
+			ret = ptrace_detach(child, data);
+			break;
+		}
+
+	case PTRACE_GETREGS:
+		{
+
+			/* Get all gp regs from the child. */
+			ret = ptrace_getregs(child, (void __user *)data);
+			break;
+		}
+
+	case PTRACE_SETREGS:
+		{
+			printk(KERN_NOTICE
+			       "ptrace: SETREGS: **** NOT IMPLEMENTED ***\n");
+			/* Set all gp regs in the child. */
+			ret = 0;
+			break;
+		}
+	default:
+		ret = ptrace_request(child, request, addr, data);
+		break;
+	}
+
+	return ret;
+}
+
+asmlinkage void syscall_trace(void)
+{
+
+	if (!test_thread_flag(TIF_SYSCALL_TRACE))
+		return;
+
+	if (!(current->ptrace & PT_PTRACED))
+		return;
+
+	/* the 0x80 provides a way for the tracing parent to distinguish
+	 * between a syscall stop and SIGTRAP delivery
+	 */
+	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+				 ? 0x80 : 0));
+
+	/*
+	 * this isn't the same as continuing with a signal, but it will do
+	 * for normal use.  strace only continues with a signal if the
+	 * stopping signal is not SIGTRAP.  -brl
+	 */
+	if (current->exit_code) {
+		send_sig(current->exit_code, current, 1);
+		current->exit_code = 0;
+	}
+}
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
new file mode 100644
index 0000000..342bb8d
--- /dev/null
+++ b/arch/blackfin/kernel/setup.c
@@ -0,0 +1,902 @@
+/*
+ * File:         arch/blackfin/kernel/setup.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/delay.h>
+#include <linux/console.h>
+#include <linux/bootmem.h>
+#include <linux/seq_file.h>
+#include <linux/cpu.h>
+#include <linux/module.h>
+#include <linux/console.h>
+#include <linux/tty.h>
+
+#include <linux/ext2_fs.h>
+#include <linux/cramfs_fs.h>
+#include <linux/romfs_fs.h>
+
+#include <asm/cacheflush.h>
+#include <asm/blackfin.h>
+#include <asm/cplbinit.h>
+
+unsigned long memory_start, memory_end, physical_mem_end;
+unsigned long reserved_mem_dcache_on;
+unsigned long reserved_mem_icache_on;
+EXPORT_SYMBOL(memory_start);
+EXPORT_SYMBOL(memory_end);
+EXPORT_SYMBOL(physical_mem_end);
+EXPORT_SYMBOL(_ramend);
+
+#ifdef CONFIG_MTD_UCLINUX
+unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
+unsigned long _ebss;
+EXPORT_SYMBOL(memory_mtd_end);
+EXPORT_SYMBOL(memory_mtd_start);
+EXPORT_SYMBOL(mtd_size);
+#endif
+
+char command_line[COMMAND_LINE_SIZE];
+
+#if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
+static void generate_cpl_tables(void);
+#endif
+
+void __init bf53x_cache_init(void)
+{
+#if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
+	generate_cpl_tables();
+#endif
+
+#ifdef CONFIG_BLKFIN_CACHE
+	bfin_icache_init();
+	printk(KERN_INFO "Instruction Cache Enabled\n");
+#endif
+
+#ifdef CONFIG_BLKFIN_DCACHE
+	bfin_dcache_init();
+	printk(KERN_INFO "Data Cache Enabled"
+# if defined CONFIG_BLKFIN_WB
+		" (write-back)"
+# elif defined CONFIG_BLKFIN_WT
+		" (write-through)"
+# endif
+		"\n");
+#endif
+}
+
+void bf53x_relocate_l1_mem(void)
+{
+	unsigned long l1_code_length;
+	unsigned long l1_data_a_length;
+	unsigned long l1_data_b_length;
+
+	l1_code_length = _etext_l1 - _stext_l1;
+	if (l1_code_length > L1_CODE_LENGTH)
+		l1_code_length = L1_CODE_LENGTH;
+	/* cannot complain as printk is not available as yet.
+	 * But we can continue booting and complain later!
+	 */
+
+	/* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
+	dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);
+
+	l1_data_a_length = _ebss_l1 - _sdata_l1;
+	if (l1_data_a_length > L1_DATA_A_LENGTH)
+		l1_data_a_length = L1_DATA_A_LENGTH;
+
+	/* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */
+	dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);
+
+	l1_data_b_length = _ebss_b_l1 - _sdata_b_l1;
+	if (l1_data_b_length > L1_DATA_B_LENGTH)
+		l1_data_b_length = L1_DATA_B_LENGTH;
+
+	/* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */
+	dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
+			l1_data_a_length, l1_data_b_length);
+
+}
+
+/*
+ * Initial parsing of the command line.  Currently, we support:
+ *  - Controlling the linux memory size: mem=xxx[KMG]
+ *  - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
+ *       $ -> reserved memory is dcacheable
+ *       # -> reserved memory is icacheable
+ */
+static __init void parse_cmdline_early(char *cmdline_p)
+{
+	char c = ' ', *to = cmdline_p;
+	unsigned int memsize;
+	for (;;) {
+		if (c == ' ') {
+
+			if (!memcmp(to, "mem=", 4)) {
+				to += 4;
+				memsize = memparse(to, &to);
+				if (memsize)
+					_ramend = memsize;
+
+			} else if (!memcmp(to, "max_mem=", 8)) {
+				to += 8;
+				memsize = memparse(to, &to);
+				if (memsize) {
+					physical_mem_end = memsize;
+					if (*to != ' ') {
+						if (*to == '$'
+						    || *(to + 1) == '$')
+							reserved_mem_dcache_on =
+							    1;
+						if (*to == '#'
+						    || *(to + 1) == '#')
+							reserved_mem_icache_on =
+							    1;
+					}
+				}
+			}
+
+		}
+		c = *(to++);
+		if (!c)
+			break;
+	}
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+	int bootmap_size;
+	unsigned long l1_length, sclk, cclk;
+#ifdef CONFIG_MTD_UCLINUX
+	unsigned long mtd_phys = 0;
+#endif
+
+	cclk = get_cclk();
+	sclk = get_sclk();
+
+#if !defined(CONFIG_BFIN_KERNEL_CLOCK) && defined(ANOMALY_05000273)
+	if (cclk == sclk)
+		panic("ANOMALY 05000273, SCLK can not be same as CCLK");
+#endif
+
+#if defined(ANOMALY_05000266)
+	bfin_read_IMDMA_D0_IRQ_STATUS();
+	bfin_read_IMDMA_D1_IRQ_STATUS();
+#endif
+
+#ifdef DEBUG_SERIAL_EARLY_INIT
+	bfin_console_init();	/* early console registration */
+	/* this give a chance to get printk() working before crash. */
+#endif
+
+#if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
+	/* we need to initialize the Flashrom device here since we might
+	 * do things with flash early on in the boot
+	 */
+	flash_probe();
+#endif
+
+#if defined(CONFIG_CMDLINE_BOOL)
+	memset(command_line, 0, sizeof(command_line));
+	strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
+	command_line[sizeof(command_line) - 1] = 0;
+#endif
+
+	/* Keep a copy of command line */
+	*cmdline_p = &command_line[0];
+	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
+	boot_command_line[COMMAND_LINE_SIZE - 1] = 0;
+
+	/* setup memory defaults from the user config */
+	physical_mem_end = 0;
+	_ramend = CONFIG_MEM_SIZE * 1024 * 1024;
+
+	parse_cmdline_early(&command_line[0]);
+
+	if (physical_mem_end == 0)
+		physical_mem_end = _ramend;
+
+	/* by now the stack is part of the init task */
+	memory_end = _ramend - DMA_UNCACHED_REGION;
+
+	_ramstart = (unsigned long)__bss_stop;
+	memory_start = PAGE_ALIGN(_ramstart);
+
+#if defined(CONFIG_MTD_UCLINUX)
+	/* generic memory mapped MTD driver */
+	memory_mtd_end = memory_end;
+
+	mtd_phys = _ramstart;
+	mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
+
+# if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
+	if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
+		mtd_size =
+		    PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
+# endif
+
+# if defined(CONFIG_CRAMFS)
+	if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
+		mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
+# endif
+
+# if defined(CONFIG_ROMFS_FS)
+	if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
+	    && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
+		mtd_size =
+		    PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
+#  if (defined(CONFIG_BLKFIN_CACHE) && defined(ANOMALY_05000263))
+	/* Due to a Hardware Anomaly we need to limit the size of usable
+	 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
+	 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
+	 */
+#   if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
+	if (memory_end >= 56 * 1024 * 1024)
+		memory_end = 56 * 1024 * 1024;
+#   else
+	if (memory_end >= 60 * 1024 * 1024)
+		memory_end = 60 * 1024 * 1024;
+#   endif				/* CONFIG_DEBUG_HUNT_FOR_ZERO */
+#  endif				/* ANOMALY_05000263 */
+# endif				/* CONFIG_ROMFS_FS */
+
+	memory_end -= mtd_size;
+
+	if (mtd_size == 0) {
+		console_init();
+		panic("Don't boot kernel without rootfs attached.\n");
+	}
+
+	/* Relocate MTD image to the top of memory after the uncached memory area */
+	dma_memcpy((char *)memory_end, __bss_stop, mtd_size);
+
+	memory_mtd_start = memory_end;
+	_ebss = memory_mtd_start;	/* define _ebss for compatible */
+#endif				/* CONFIG_MTD_UCLINUX */
+
+#if (defined(CONFIG_BLKFIN_CACHE) && defined(ANOMALY_05000263))
+	/* Due to a Hardware Anomaly we need to limit the size of usable
+	 * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
+	 * 05000263 - Hardware loop corrupted when taking an ICPLB exception
+	 */
+#if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
+	if (memory_end >= 56 * 1024 * 1024)
+		memory_end = 56 * 1024 * 1024;
+#else
+	if (memory_end >= 60 * 1024 * 1024)
+		memory_end = 60 * 1024 * 1024;
+#endif				/* CONFIG_DEBUG_HUNT_FOR_ZERO */
+	printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
+#endif				/* ANOMALY_05000263 */
+
+#if !defined(CONFIG_MTD_UCLINUX)
+	memory_end -= SIZE_4K; /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
+#endif
+	init_mm.start_code = (unsigned long)_stext;
+	init_mm.end_code = (unsigned long)_etext;
+	init_mm.end_data = (unsigned long)_edata;
+	init_mm.brk = (unsigned long)0;
+
+	init_leds();
+
+	printk(KERN_INFO "Blackfin support (C) 2004-2007 Analog Devices, Inc.\n");
+	printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
+	if (bfin_revid() != bfin_compiled_revid())
+		printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
+		       bfin_compiled_revid(), bfin_revid());
+	if (bfin_revid() < SUPPORTED_REVID)
+		printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
+		       CPU, bfin_revid());
+	printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
+
+	printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu Mhz System Clock\n",
+	       cclk / 1000000,  sclk / 1000000);
+
+#if defined(ANOMALY_05000273)
+	if ((cclk >> 1) <= sclk)
+		printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
+#endif
+
+	printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
+	printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
+
+	printk(KERN_INFO "Memory map:\n"
+	       KERN_INFO "  text      = 0x%p-0x%p\n"
+	       KERN_INFO "  init      = 0x%p-0x%p\n"
+	       KERN_INFO "  data      = 0x%p-0x%p\n"
+	       KERN_INFO "  stack     = 0x%p-0x%p\n"
+	       KERN_INFO "  bss       = 0x%p-0x%p\n"
+	       KERN_INFO "  available = 0x%p-0x%p\n"
+#ifdef CONFIG_MTD_UCLINUX
+	       KERN_INFO "  rootfs    = 0x%p-0x%p\n"
+#endif
+#if DMA_UNCACHED_REGION > 0
+	       KERN_INFO "  DMA Zone  = 0x%p-0x%p\n"
+#endif
+	       , _stext, _etext,
+	       __init_begin, __init_end,
+	       _sdata, _edata,
+	       (void*)&init_thread_union, (void*)((int)(&init_thread_union) + 0x2000),
+	       __bss_start, __bss_stop,
+	       (void*)_ramstart, (void*)memory_end
+#ifdef CONFIG_MTD_UCLINUX
+	       , (void*)memory_mtd_start, (void*)(memory_mtd_start + mtd_size)
+#endif
+#if DMA_UNCACHED_REGION > 0
+	       , (void*)(_ramend - DMA_UNCACHED_REGION), (void*)(_ramend)
+#endif
+	       );
+
+	/*
+	 * give all the memory to the bootmap allocator,  tell it to put the
+	 * boot mem_map at the start of memory
+	 */
+	bootmap_size = init_bootmem_node(NODE_DATA(0), memory_start >> PAGE_SHIFT,	/* map goes here */
+					 PAGE_OFFSET >> PAGE_SHIFT,
+					 memory_end >> PAGE_SHIFT);
+	/*
+	 * free the usable memory,  we have to make sure we do not free
+	 * the bootmem bitmap so we then reserve it after freeing it :-)
+	 */
+	free_bootmem(memory_start, memory_end - memory_start);
+
+	reserve_bootmem(memory_start, bootmap_size);
+	/*
+	 * get kmalloc into gear
+	 */
+	paging_init();
+
+	/* check the size of the l1 area */
+	l1_length = _etext_l1 - _stext_l1;
+	if (l1_length > L1_CODE_LENGTH)
+		panic("L1 memory overflow\n");
+
+	l1_length = _ebss_l1 - _sdata_l1;
+	if (l1_length > L1_DATA_A_LENGTH)
+		panic("L1 memory overflow\n");
+
+	bf53x_cache_init();
+
+#if defined(CONFIG_SMC91X) || defined(CONFIG_SMC91X_MODULE)
+# if defined(CONFIG_BFIN_SHARED_FLASH_ENET) && defined(CONFIG_BFIN533_STAMP)
+	/* setup BF533_STAMP CPLD to route AMS3 to Ethernet MAC */
+	bfin_write_FIO_DIR(bfin_read_FIO_DIR() | (1 << CONFIG_ENET_FLASH_PIN));
+	bfin_write_FIO_FLAG_S(1 << CONFIG_ENET_FLASH_PIN);
+	SSYNC();
+# endif
+# if defined (CONFIG_BFIN561_EZKIT)
+	bfin_write_FIO0_DIR(bfin_read_FIO0_DIR() | (1 << 12));
+	SSYNC();
+# endif /* defined (CONFIG_BFIN561_EZKIT) */
+#endif
+
+	printk(KERN_INFO "Hardware Trace Enabled\n");
+	bfin_write_TBUFCTL(0x03);
+}
+
+#if defined(CONFIG_BF561)
+static struct cpu cpu[2];
+#else
+static struct cpu cpu[1];
+#endif
+static int __init topology_init(void)
+{
+#if defined (CONFIG_BF561)
+	register_cpu(&cpu[0], 0);
+	register_cpu(&cpu[1], 1);
+	return 0;
+#else
+	return register_cpu(cpu, 0);
+#endif
+}
+
+subsys_initcall(topology_init);
+
+#if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
+u16 lock_kernel_check(u32 start, u32 end)
+{
+	if ((start <= (u32) _stext && end >= (u32) _end)
+	    || (start >= (u32) _stext && end <= (u32) _end))
+		return IN_KERNEL;
+	return 0;
+}
+
+static unsigned short __init
+fill_cplbtab(struct cplb_tab *table,
+	     unsigned long start, unsigned long end,
+	     unsigned long block_size, unsigned long cplb_data)
+{
+	int i;
+
+	switch (block_size) {
+	case SIZE_4M:
+		i = 3;
+		break;
+	case SIZE_1M:
+		i = 2;
+		break;
+	case SIZE_4K:
+		i = 1;
+		break;
+	case SIZE_1K:
+	default:
+		i = 0;
+		break;
+	}
+
+	cplb_data = (cplb_data & ~(3 << 16)) | (i << 16);
+
+	while ((start < end) && (table->pos < table->size)) {
+
+		table->tab[table->pos++] = start;
+
+		if (lock_kernel_check(start, start + block_size) == IN_KERNEL)
+			table->tab[table->pos++] =
+			    cplb_data | CPLB_LOCK | CPLB_DIRTY;
+		else
+			table->tab[table->pos++] = cplb_data;
+
+		start += block_size;
+	}
+	return 0;
+}
+
+static unsigned short __init
+close_cplbtab(struct cplb_tab *table)
+{
+
+	while (table->pos < table->size) {
+
+		table->tab[table->pos++] = 0;
+		table->tab[table->pos++] = 0; /* !CPLB_VALID */
+	}
+	return 0;
+}
+
+static void __init generate_cpl_tables(void)
+{
+
+	u16 i, j, process;
+	u32 a_start, a_end, as, ae, as_1m;
+
+	struct cplb_tab *t_i = NULL;
+	struct cplb_tab *t_d = NULL;
+	struct s_cplb cplb;
+
+	cplb.init_i.size = MAX_CPLBS;
+	cplb.init_d.size = MAX_CPLBS;
+	cplb.switch_i.size = MAX_SWITCH_I_CPLBS;
+	cplb.switch_d.size = MAX_SWITCH_D_CPLBS;
+
+	cplb.init_i.pos = 0;
+	cplb.init_d.pos = 0;
+	cplb.switch_i.pos = 0;
+	cplb.switch_d.pos = 0;
+
+	cplb.init_i.tab = icplb_table;
+	cplb.init_d.tab = dcplb_table;
+	cplb.switch_i.tab = ipdt_table;
+	cplb.switch_d.tab = dpdt_table;
+
+	cplb_data[SDRAM_KERN].end = memory_end;
+
+#ifdef CONFIG_MTD_UCLINUX
+	cplb_data[SDRAM_RAM_MTD].start = memory_mtd_start;
+	cplb_data[SDRAM_RAM_MTD].end = memory_mtd_start + mtd_size;
+	cplb_data[SDRAM_RAM_MTD].valid = mtd_size > 0;
+# if defined(CONFIG_ROMFS_FS)
+	cplb_data[SDRAM_RAM_MTD].attr |= I_CPLB;
+
+	/*
+	 * The ROMFS_FS size is often not multiple of 1MB.
+	 * This can cause multiple CPLB sets covering the same memory area.
+	 * This will then cause multiple CPLB hit exceptions.
+	 * Workaround: We ensure a contiguous memory area by extending the kernel
+	 * memory section over the mtd section.
+	 * For ROMFS_FS memory must be covered with ICPLBs anyways.
+	 * So there is no difference between kernel and mtd memory setup.
+	 */
+
+	cplb_data[SDRAM_KERN].end = memory_mtd_start + mtd_size;;
+	cplb_data[SDRAM_RAM_MTD].valid = 0;
+
+# endif
+#else
+	cplb_data[SDRAM_RAM_MTD].valid = 0;
+#endif
+
+	cplb_data[SDRAM_DMAZ].start = _ramend - DMA_UNCACHED_REGION;
+	cplb_data[SDRAM_DMAZ].end = _ramend;
+
+	cplb_data[RES_MEM].start = _ramend;
+	cplb_data[RES_MEM].end = physical_mem_end;
+
+	if (reserved_mem_dcache_on)
+		cplb_data[RES_MEM].d_conf = SDRAM_DGENERIC;
+	else
+		cplb_data[RES_MEM].d_conf = SDRAM_DNON_CHBL;
+
+	if (reserved_mem_icache_on)
+		cplb_data[RES_MEM].i_conf = SDRAM_IGENERIC;
+	else
+		cplb_data[RES_MEM].i_conf = SDRAM_INON_CHBL;
+
+	for (i = ZERO_P; i <= L2_MEM; i++) {
+
+		if (cplb_data[i].valid) {
+
+			as_1m = cplb_data[i].start % SIZE_1M;
+
+			/* We need to make sure all sections are properly 1M aligned
+			 * However between Kernel Memory and the Kernel mtd section, depending on the
+			 * rootfs size, there can be overlapping memory areas.
+			 */
+
+			if (as_1m &&  i!=L1I_MEM && i!=L1D_MEM) {
+#ifdef CONFIG_MTD_UCLINUX
+				if (i == SDRAM_RAM_MTD) {
+					if ((cplb_data[SDRAM_KERN].end + 1) > cplb_data[SDRAM_RAM_MTD].start)
+						cplb_data[SDRAM_RAM_MTD].start = (cplb_data[i].start & (-2*SIZE_1M)) + SIZE_1M;
+					else
+						cplb_data[SDRAM_RAM_MTD].start = (cplb_data[i].start & (-2*SIZE_1M));
+				} else
+#endif
+					printk(KERN_WARNING "Unaligned Start of %s at 0x%X\n",
+					       cplb_data[i].name, cplb_data[i].start);
+			}
+
+			as = cplb_data[i].start % SIZE_4M;
+			ae = cplb_data[i].end % SIZE_4M;
+
+			if (as)
+				a_start = cplb_data[i].start + (SIZE_4M - (as));
+			else
+				a_start = cplb_data[i].start;
+
+			a_end = cplb_data[i].end - ae;
+
+			for (j = INITIAL_T; j <= SWITCH_T; j++) {
+
+				switch (j) {
+				case INITIAL_T:
+					if (cplb_data[i].attr & INITIAL_T) {
+						t_i = &cplb.init_i;
+						t_d = &cplb.init_d;
+						process = 1;
+					} else
+						process = 0;
+					break;
+				case SWITCH_T:
+					if (cplb_data[i].attr & SWITCH_T) {
+						t_i = &cplb.switch_i;
+						t_d = &cplb.switch_d;
+						process = 1;
+					} else
+						process = 0;
+					break;
+				default:
+						process = 0;
+					break;
+				}
+
+	if (process) {
+				if (cplb_data[i].attr & I_CPLB) {
+
+					if (cplb_data[i].psize) {
+						fill_cplbtab(t_i,
+							     cplb_data[i].start,
+							     cplb_data[i].end,
+							     cplb_data[i].psize,
+							     cplb_data[i].i_conf);
+					} else {
+						/*icplb_table */
+#if (defined(CONFIG_BLKFIN_CACHE) && defined(ANOMALY_05000263))
+						if (i == SDRAM_KERN) {
+							fill_cplbtab(t_i,
+								     cplb_data[i].start,
+								     cplb_data[i].end,
+								     SIZE_4M,
+								     cplb_data[i].i_conf);
+						} else
+#endif
+						{
+							fill_cplbtab(t_i,
+								     cplb_data[i].start,
+								     a_start,
+								     SIZE_1M,
+								     cplb_data[i].i_conf);
+							fill_cplbtab(t_i,
+								     a_start,
+								     a_end,
+								     SIZE_4M,
+								     cplb_data[i].i_conf);
+							fill_cplbtab(t_i, a_end,
+								     cplb_data[i].end,
+								     SIZE_1M,
+								     cplb_data[i].i_conf);
+						}
+					}
+
+				}
+				if (cplb_data[i].attr & D_CPLB) {
+
+					if (cplb_data[i].psize) {
+						fill_cplbtab(t_d,
+							     cplb_data[i].start,
+							     cplb_data[i].end,
+							     cplb_data[i].psize,
+							     cplb_data[i].d_conf);
+					} else {
+/*dcplb_table*/
+						fill_cplbtab(t_d,
+							     cplb_data[i].start,
+							     a_start, SIZE_1M,
+							     cplb_data[i].d_conf);
+						fill_cplbtab(t_d, a_start,
+							     a_end, SIZE_4M,
+							     cplb_data[i].d_conf);
+						fill_cplbtab(t_d, a_end,
+							     cplb_data[i].end,
+							     SIZE_1M,
+							     cplb_data[i].d_conf);
+
+					}
+
+				}
+			}
+			}
+
+		}
+	}
+
+/* close tables */
+
+	close_cplbtab(&cplb.init_i);
+	close_cplbtab(&cplb.init_d);
+
+	cplb.init_i.tab[cplb.init_i.pos] = -1;
+	cplb.init_d.tab[cplb.init_d.pos] = -1;
+	cplb.switch_i.tab[cplb.switch_i.pos] = -1;
+	cplb.switch_d.tab[cplb.switch_d.pos] = -1;
+
+}
+
+#endif
+
+static inline u_long get_vco(void)
+{
+	u_long msel;
+	u_long vco;
+
+	msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
+	if (0 == msel)
+		msel = 64;
+
+	vco = CONFIG_CLKIN_HZ;
+	vco >>= (1 & bfin_read_PLL_CTL());	/* DF bit */
+	vco = msel * vco;
+	return vco;
+}
+
+/*Get the Core clock*/
+u_long get_cclk(void)
+{
+	u_long csel, ssel;
+	if (bfin_read_PLL_STAT() & 0x1)
+		return CONFIG_CLKIN_HZ;
+
+	ssel = bfin_read_PLL_DIV();
+	csel = ((ssel >> 4) & 0x03);
+	ssel &= 0xf;
+	if (ssel && ssel < (1 << csel))	/* SCLK > CCLK */
+		return get_vco() / ssel;
+	return get_vco() >> csel;
+}
+
+EXPORT_SYMBOL(get_cclk);
+
+/* Get the System clock */
+u_long get_sclk(void)
+{
+	u_long ssel;
+
+	if (bfin_read_PLL_STAT() & 0x1)
+		return CONFIG_CLKIN_HZ;
+
+	ssel = (bfin_read_PLL_DIV() & 0xf);
+	if (0 == ssel) {
+		printk(KERN_WARNING "Invalid System Clock\n");
+		ssel = 1;
+	}
+
+	return get_vco() / ssel;
+}
+
+EXPORT_SYMBOL(get_sclk);
+
+/*
+ *	Get CPU information for use by the procfs.
+ */
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+	char *cpu, *mmu, *fpu, *name;
+	uint32_t revid;
+
+	u_long cclk = 0, sclk = 0;
+	u_int dcache_size = 0, dsup_banks = 0;
+
+	cpu = CPU;
+	mmu = "none";
+	fpu = "none";
+	revid = bfin_revid();
+	name = bfin_board_name;
+
+	cclk = get_cclk();
+	sclk = get_sclk();
+
+	seq_printf(m, "CPU:\t\tADSP-%s Rev. 0.%d\n"
+		   "MMU:\t\t%s\n"
+		   "FPU:\t\t%s\n"
+		   "Core Clock:\t%9lu Hz\n"
+		   "System Clock:\t%9lu Hz\n"
+		   "BogoMips:\t%lu.%02lu\n"
+		   "Calibration:\t%lu loops\n",
+		   cpu, revid, mmu, fpu,
+		   cclk,
+		   sclk,
+		   (loops_per_jiffy * HZ) / 500000,
+		   ((loops_per_jiffy * HZ) / 5000) % 100,
+		   (loops_per_jiffy * HZ));
+	seq_printf(m, "Board Name:\t%s\n", name);
+	seq_printf(m, "Board Memory:\t%ld MB\n", physical_mem_end >> 20);
+	seq_printf(m, "Kernel Memory:\t%ld MB\n", (unsigned long)_ramend >> 20);
+	if (bfin_read_IMEM_CONTROL() & (ENICPLB | IMC))
+		seq_printf(m, "I-CACHE:\tON\n");
+	else
+		seq_printf(m, "I-CACHE:\tOFF\n");
+	if ((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE))
+		seq_printf(m, "D-CACHE:\tON"
+#if defined CONFIG_BLKFIN_WB
+			   " (write-back)"
+#elif defined CONFIG_BLKFIN_WT
+			   " (write-through)"
+#endif
+			   "\n");
+	else
+		seq_printf(m, "D-CACHE:\tOFF\n");
+
+
+	switch(bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
+		case ACACHE_BSRAM:
+			seq_printf(m, "DBANK-A:\tCACHE\n" "DBANK-B:\tSRAM\n");
+			dcache_size = 16;
+			dsup_banks = 1;
+			break;
+		case ACACHE_BCACHE:
+			seq_printf(m, "DBANK-A:\tCACHE\n" "DBANK-B:\tCACHE\n");
+			dcache_size = 32;
+			dsup_banks = 2;
+			break;
+		case ASRAM_BSRAM:
+			seq_printf(m, "DBANK-A:\tSRAM\n" "DBANK-B:\tSRAM\n");
+			dcache_size = 0;
+			dsup_banks = 0;
+			break;
+		default:
+		break;
+	}
+
+
+	seq_printf(m, "I-CACHE Size:\t%dKB\n", BLKFIN_ICACHESIZE / 1024);
+	seq_printf(m, "D-CACHE Size:\t%dKB\n", dcache_size);
+	seq_printf(m, "I-CACHE Setup:\t%d Sub-banks/%d Ways, %d Lines/Way\n",
+		   BLKFIN_ISUBBANKS, BLKFIN_IWAYS, BLKFIN_ILINES);
+	seq_printf(m,
+		   "D-CACHE Setup:\t%d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
+		   dsup_banks, BLKFIN_DSUBBANKS, BLKFIN_DWAYS,
+		   BLKFIN_DLINES);
+#ifdef CONFIG_BLKFIN_CACHE_LOCK
+	switch (read_iloc()) {
+	case WAY0_L:
+		seq_printf(m, "Way0 Locked-Down\n");
+		break;
+	case WAY1_L:
+		seq_printf(m, "Way1 Locked-Down\n");
+		break;
+	case WAY01_L:
+		seq_printf(m, "Way0,Way1 Locked-Down\n");
+		break;
+	case WAY2_L:
+		seq_printf(m, "Way2 Locked-Down\n");
+		break;
+	case WAY02_L:
+		seq_printf(m, "Way0,Way2 Locked-Down\n");
+		break;
+	case WAY12_L:
+		seq_printf(m, "Way1,Way2 Locked-Down\n");
+		break;
+	case WAY012_L:
+		seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
+		break;
+	case WAY3_L:
+		seq_printf(m, "Way3 Locked-Down\n");
+		break;
+	case WAY03_L:
+		seq_printf(m, "Way0,Way3 Locked-Down\n");
+		break;
+	case WAY13_L:
+		seq_printf(m, "Way1,Way3 Locked-Down\n");
+		break;
+	case WAY013_L:
+		seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
+		break;
+	case WAY32_L:
+		seq_printf(m, "Way3,Way2 Locked-Down\n");
+		break;
+	case WAY320_L:
+		seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
+		break;
+	case WAY321_L:
+		seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
+		break;
+	case WAYALL_L:
+		seq_printf(m, "All Ways are locked\n");
+		break;
+	default:
+		seq_printf(m, "No Ways are locked\n");
+	}
+#endif
+	return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+	return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	++*pos;
+	return c_start(m, pos);
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+struct seq_operations cpuinfo_op = {
+	.start = c_start,
+	.next = c_next,
+	.stop = c_stop,
+	.show = show_cpuinfo,
+};
+
+void cmdline_init(unsigned long r0)
+{
+	if (r0)
+		strncpy(command_line, (char *)r0, COMMAND_LINE_SIZE);
+}
diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c
new file mode 100644
index 0000000..316e65c
--- /dev/null
+++ b/arch/blackfin/kernel/signal.c
@@ -0,0 +1,356 @@
+/*
+ * File:         arch/blackfin/kernel/signal.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/signal.h>
+#include <linux/syscalls.h>
+#include <linux/ptrace.h>
+#include <linux/tty.h>
+#include <linux/personality.h>
+#include <linux/binfmts.h>
+#include <linux/freezer.h>
+
+#include <asm/uaccess.h>
+#include <asm/cacheflush.h>
+#include <asm/ucontext.h>
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+struct fdpic_func_descriptor {
+	unsigned long	text;
+	unsigned long	GOT;
+};
+
+struct rt_sigframe {
+	int sig;
+	struct siginfo *pinfo;
+	void *puc;
+	char retcode[8];
+	struct siginfo info;
+	struct ucontext uc;
+};
+
+asmlinkage int sys_sigaltstack(const stack_t * uss, stack_t * uoss)
+{
+	return do_sigaltstack(uss, uoss, rdusp());
+}
+
+static inline int
+rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc, int *pr0)
+{
+	unsigned long usp = 0;
+	int err = 0;
+
+#define RESTORE(x) err |= __get_user(regs->x, &sc->sc_##x)
+
+	/* restore passed registers */
+	RESTORE(r0); RESTORE(r1); RESTORE(r2); RESTORE(r3);
+	RESTORE(r4); RESTORE(r5); RESTORE(r6); RESTORE(r7);
+	RESTORE(p0); RESTORE(p1); RESTORE(p2); RESTORE(p3);
+	RESTORE(p4); RESTORE(p5);
+	err |= __get_user(usp, &sc->sc_usp);
+	wrusp(usp);
+	RESTORE(a0w); RESTORE(a1w);
+	RESTORE(a0x); RESTORE(a1x);
+	RESTORE(astat);
+	RESTORE(rets);
+	RESTORE(pc);
+	RESTORE(retx);
+	RESTORE(fp);
+	RESTORE(i0); RESTORE(i1); RESTORE(i2); RESTORE(i3);
+	RESTORE(m0); RESTORE(m1); RESTORE(m2); RESTORE(m3);
+	RESTORE(l0); RESTORE(l1); RESTORE(l2); RESTORE(l3);
+	RESTORE(b0); RESTORE(b1); RESTORE(b2); RESTORE(b3);
+	RESTORE(lc0); RESTORE(lc1);
+	RESTORE(lt0); RESTORE(lt1);
+	RESTORE(lb0); RESTORE(lb1);
+	RESTORE(seqstat);
+
+	regs->orig_p0 = -1;	/* disable syscall checks */
+
+	*pr0 = regs->r0;
+	return err;
+}
+
+asmlinkage int do_rt_sigreturn(unsigned long __unused)
+{
+	struct pt_regs *regs = (struct pt_regs *)__unused;
+	unsigned long usp = rdusp();
+	struct rt_sigframe *frame = (struct rt_sigframe *)(usp);
+	sigset_t set;
+	int r0;
+
+	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+		goto badframe;
+	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+		goto badframe;
+
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	current->blocked = set;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	if (rt_restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
+		goto badframe;
+
+	if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->usp) == -EFAULT)
+		goto badframe;
+
+	return r0;
+
+      badframe:
+	force_sig(SIGSEGV, current);
+	return 0;
+}
+
+static inline int rt_setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs)
+{
+	int err = 0;
+
+#define SETUP(x) err |= __put_user(regs->x, &sc->sc_##x)
+
+	SETUP(r0); SETUP(r1); SETUP(r2); SETUP(r3);
+	SETUP(r4); SETUP(r5); SETUP(r6); SETUP(r7);
+	SETUP(p0); SETUP(p1); SETUP(p2); SETUP(p3);
+	SETUP(p4); SETUP(p5);
+	err |= __put_user(rdusp(), &sc->sc_usp);
+	SETUP(a0w); SETUP(a1w);
+	SETUP(a0x); SETUP(a1x);
+	SETUP(astat);
+	SETUP(rets);
+	SETUP(pc);
+	SETUP(retx);
+	SETUP(fp);
+	SETUP(i0); SETUP(i1); SETUP(i2); SETUP(i3);
+	SETUP(m0); SETUP(m1); SETUP(m2); SETUP(m3);
+	SETUP(l0); SETUP(l1); SETUP(l2); SETUP(l3);
+	SETUP(b0); SETUP(b1); SETUP(b2); SETUP(b3);
+	SETUP(lc0); SETUP(lc1);
+	SETUP(lt0); SETUP(lt1);
+	SETUP(lb0); SETUP(lb1);
+	SETUP(seqstat);
+
+	return err;
+}
+
+static inline void push_cache(unsigned long vaddr, unsigned int len)
+{
+	flush_icache_range(vaddr, vaddr + len);
+}
+
+static inline void *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
+				 size_t frame_size)
+{
+	unsigned long usp;
+
+	/* Default to using normal stack.  */
+	usp = rdusp();
+
+	/* This is the X/Open sanctioned signal stack switching.  */
+	if (ka->sa.sa_flags & SA_ONSTACK) {
+		if (!on_sig_stack(usp))
+			usp = current->sas_ss_sp + current->sas_ss_size;
+	}
+	return (void *)((usp - frame_size) & -8UL);
+}
+
+static int
+setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info,
+	       sigset_t * set, struct pt_regs *regs)
+{
+	struct rt_sigframe *frame;
+	int err = 0;
+
+	frame = get_sigframe(ka, regs, sizeof(*frame));
+
+	err |= __put_user((current_thread_info()->exec_domain
+			   && current_thread_info()->exec_domain->signal_invmap
+			   && sig < 32
+			   ? current_thread_info()->exec_domain->
+			   signal_invmap[sig] : sig), &frame->sig);
+
+	err |= __put_user(&frame->info, &frame->pinfo);
+	err |= __put_user(&frame->uc, &frame->puc);
+	err |= copy_siginfo_to_user(&frame->info, info);
+
+	/* Create the ucontext.  */
+	err |= __put_user(0, &frame->uc.uc_flags);
+	err |= __put_user(0, &frame->uc.uc_link);
+	err |=
+	    __put_user((void *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
+	err |= __put_user(sas_ss_flags(rdusp()), &frame->uc.uc_stack.ss_flags);
+	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= rt_setup_sigcontext(&frame->uc.uc_mcontext, regs);
+	err |= copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+
+	/* Set up to return from userspace.  */
+	err |= __put_user(0x28, &(frame->retcode[0]));
+	err |= __put_user(0xe1, &(frame->retcode[1]));
+	err |= __put_user(0xad, &(frame->retcode[2]));
+	err |= __put_user(0x00, &(frame->retcode[3]));
+	err |= __put_user(0xa0, &(frame->retcode[4]));
+	err |= __put_user(0x00, &(frame->retcode[5]));
+
+	if (err)
+		goto give_sigsegv;
+
+	push_cache((unsigned long)&frame->retcode, sizeof(frame->retcode));
+
+	/* Set up registers for signal handler */
+	wrusp((unsigned long)frame);
+	if (get_personality & FDPIC_FUNCPTRS) {
+		struct fdpic_func_descriptor __user *funcptr =
+			(struct fdpic_func_descriptor *) ka->sa.sa_handler;
+		__get_user(regs->pc, &funcptr->text);
+		__get_user(regs->p3, &funcptr->GOT);
+	} else
+		regs->pc = (unsigned long)ka->sa.sa_handler;
+	regs->rets = (unsigned long)(frame->retcode);
+
+	regs->r0 = frame->sig;
+	regs->r1 = (unsigned long)(&frame->info);
+	regs->r2 = (unsigned long)(&frame->uc);
+
+	return 0;
+
+      give_sigsegv:
+	if (sig == SIGSEGV)
+		ka->sa.sa_handler = SIG_DFL;
+	force_sig(SIGSEGV, current);
+	return -EFAULT;
+}
+
+static inline void
+handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
+{
+	switch (regs->r0) {
+	case -ERESTARTNOHAND:
+		if (!has_handler)
+			goto do_restart;
+		regs->r0 = -EINTR;
+		break;
+
+	case -ERESTARTSYS:
+		if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
+			regs->r0 = -EINTR;
+			break;
+		}
+		/* fallthrough */
+	case -ERESTARTNOINTR:
+	      do_restart:
+		regs->p0 = regs->orig_p0;
+		regs->r0 = regs->orig_r0;
+		regs->pc -= 2;
+		break;
+	}
+}
+
+/*
+ * OK, we're invoking a handler
+ */
+static int
+handle_signal(int sig, siginfo_t *info, struct k_sigaction *ka,
+	      sigset_t *oldset, struct pt_regs *regs)
+{
+	int ret;
+
+	/* are we from a system call? to see pt_regs->orig_p0 */
+	if (regs->orig_p0 >= 0)
+		/* If so, check system call restarting.. */
+		handle_restart(regs, ka, 1);
+
+	/* set up the stack frame */
+	ret = setup_rt_frame(sig, ka, info, oldset, regs);
+
+	if (ret == 0) {
+		spin_lock_irq(&current->sighand->siglock);
+		sigorsets(&current->blocked, &current->blocked,
+			  &ka->sa.sa_mask);
+		if (!(ka->sa.sa_flags & SA_NODEFER))
+			sigaddset(&current->blocked, sig);
+		recalc_sigpending();
+		spin_unlock_irq(&current->sighand->siglock);
+	}
+	return ret;
+}
+
+/*
+ * Note that 'init' is a special process: it doesn't get signals it doesn't
+ * want to handle. Thus you cannot kill init even with a SIGKILL even by
+ * mistake.
+ *
+ * Note that we go through the signals twice: once to check the signals
+ * that the kernel can handle, and then we build all the user-level signal
+ * handling stack-frames in one go after that.
+ */
+asmlinkage void do_signal(struct pt_regs *regs)
+{
+	siginfo_t info;
+	int signr;
+	struct k_sigaction ka;
+	sigset_t *oldset;
+
+	current->thread.esp0 = (unsigned long)regs;
+
+	if (try_to_freeze())
+		goto no_signal;
+
+	if (test_thread_flag(TIF_RESTORE_SIGMASK))
+		oldset = &current->saved_sigmask;
+	else
+		oldset = &current->blocked;
+
+	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+	if (signr > 0) {
+		/* Whee!  Actually deliver the signal.  */
+		if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
+			/* a signal was successfully delivered; the saved
+			 * sigmask will have been stored in the signal frame,
+			 * and will be restored by sigreturn, so we can simply
+			 * clear the TIF_RESTORE_SIGMASK flag */
+			if (test_thread_flag(TIF_RESTORE_SIGMASK))
+				clear_thread_flag(TIF_RESTORE_SIGMASK);
+		}
+
+		return;
+	}
+
+no_signal:
+	/* Did we come from a system call? */
+	if (regs->orig_p0 >= 0)
+		/* Restart the system call - no handlers present */
+		handle_restart(regs, NULL, 0);
+
+	/* if there's no signal to deliver, we just put the saved sigmask
+	 * back */
+	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+		clear_thread_flag(TIF_RESTORE_SIGMASK);
+		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+	}
+}
diff --git a/arch/blackfin/kernel/sys_bfin.c b/arch/blackfin/kernel/sys_bfin.c
new file mode 100644
index 0000000..f436e67
--- /dev/null
+++ b/arch/blackfin/kernel/sys_bfin.c
@@ -0,0 +1,115 @@
+/*
+ * File:         arch/blackfin/kernel/sys_bfin.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:  This file contains various random system calls that
+ *               have a non-standard calling sequence on the Linux/bfin
+ *               platform.
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/syscalls.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+
+#include <asm/cacheflush.h>
+#include <asm/uaccess.h>
+#include <asm/ipc.h>
+#include <asm/dma.h>
+#include <asm/unistd.h>
+
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way unix traditionally does this, though.
+ */
+asmlinkage int sys_pipe(unsigned long *fildes)
+{
+	int fd[2];
+	int error;
+
+	error = do_pipe(fd);
+	if (!error) {
+		if (copy_to_user(fildes, fd, 2 * sizeof(int)))
+			error = -EFAULT;
+	}
+	return error;
+}
+
+/* common code for old and new mmaps */
+static inline long
+do_mmap2(unsigned long addr, unsigned long len,
+	 unsigned long prot, unsigned long flags,
+	 unsigned long fd, unsigned long pgoff)
+{
+	int error = -EBADF;
+	struct file *file = NULL;
+
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	if (!(flags & MAP_ANONYMOUS)) {
+		file = fget(fd);
+		if (!file)
+			goto out;
+	}
+
+	down_write(&current->mm->mmap_sem);
+	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+	up_write(&current->mm->mmap_sem);
+
+	if (file)
+		fput(file);
+      out:
+	return error;
+}
+
+asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
+			  unsigned long prot, unsigned long flags,
+			  unsigned long fd, unsigned long pgoff)
+{
+	return do_mmap2(addr, len, prot, flags, fd, pgoff);
+}
+
+asmlinkage int sys_getpagesize(void)
+{
+	return PAGE_SIZE;
+}
+
+asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags)
+{
+	return sram_alloc_with_lsl(size, flags);
+}
+
+asmlinkage int sys_sram_free(const void *addr)
+{
+	return sram_free_with_lsl(addr);
+}
+
+asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len)
+{
+	return safe_dma_memcpy(dest, src, len);
+}
diff --git a/arch/blackfin/kernel/time.c b/arch/blackfin/kernel/time.c
new file mode 100644
index 0000000..f578176
--- /dev/null
+++ b/arch/blackfin/kernel/time.c
@@ -0,0 +1,326 @@
+/*
+ * File:         arch/blackfin/kernel/time.c
+ * Based on:     none - original work
+ * Author:
+ *
+ * Created:
+ * Description:  This file contains the bfin-specific time handling details.
+ *               Most of the stuff is located in the machine specific files.
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/module.h>
+#include <linux/profile.h>
+#include <linux/interrupt.h>
+#include <linux/time.h>
+#include <linux/irq.h>
+
+#include <asm/blackfin.h>
+
+/* This is an NTP setting */
+#define	TICK_SIZE (tick_nsec / 1000)
+
+static void time_sched_init(irqreturn_t(*timer_routine)
+			(int, void *));
+static unsigned long gettimeoffset(void);
+static inline void do_leds(void);
+
+#if (defined(CONFIG_BFIN_ALIVE_LED) || defined(CONFIG_BFIN_IDLE_LED))
+void __init init_leds(void)
+{
+	unsigned int tmp = 0;
+
+#if defined(CONFIG_BFIN_ALIVE_LED)
+	/* config pins as output. */
+	tmp = bfin_read_CONFIG_BFIN_ALIVE_LED_DPORT();
+	SSYNC();
+	bfin_write_CONFIG_BFIN_ALIVE_LED_DPORT(tmp | CONFIG_BFIN_ALIVE_LED_PIN);
+	SSYNC();
+
+	/*      First set led be off */
+	tmp = bfin_read_CONFIG_BFIN_ALIVE_LED_PORT();
+	SSYNC();
+	bfin_write_CONFIG_BFIN_ALIVE_LED_PORT(tmp | CONFIG_BFIN_ALIVE_LED_PIN);	/* light off */
+	SSYNC();
+#endif
+
+#if defined(CONFIG_BFIN_IDLE_LED)
+	/* config pins as output. */
+	tmp = bfin_read_CONFIG_BFIN_IDLE_LED_DPORT();
+	SSYNC();
+	bfin_write_CONFIG_BFIN_IDLE_LED_DPORT(tmp | CONFIG_BFIN_IDLE_LED_PIN);
+	SSYNC();
+
+	/*      First set led be off */
+	tmp = bfin_read_CONFIG_BFIN_IDLE_LED_PORT();
+	SSYNC();
+	bfin_write_CONFIG_BFIN_IDLE_LED_PORT(tmp | CONFIG_BFIN_IDLE_LED_PIN);	/* light off */
+	SSYNC();
+#endif
+}
+#else
+void __init init_leds(void)
+{
+}
+#endif
+
+#if defined(CONFIG_BFIN_ALIVE_LED)
+static inline void do_leds(void)
+{
+	static unsigned int count = 50;
+	static int flag = 0;
+	unsigned short tmp = 0;
+
+	if (--count == 0) {
+		count = 50;
+		flag = ~flag;
+	}
+	tmp = bfin_read_CONFIG_BFIN_ALIVE_LED_PORT();
+	SSYNC();
+
+	if (flag)
+		tmp &= ~CONFIG_BFIN_ALIVE_LED_PIN;	/* light on */
+	else
+		tmp |= CONFIG_BFIN_ALIVE_LED_PIN;	/* light off */
+
+	bfin_write_CONFIG_BFIN_ALIVE_LED_PORT(tmp);
+	SSYNC();
+
+}
+#else
+static inline void do_leds(void)
+{
+}
+#endif
+
+static struct irqaction bfin_timer_irq = {
+	.name = "BFIN Timer Tick",
+	.flags = IRQF_DISABLED
+};
+
+/*
+ * The way that the Blackfin core timer works is:
+ *  - CCLK is divided by a programmable 8-bit pre-scaler (TSCALE)
+ *  - Every time TSCALE ticks, a 32bit is counted down (TCOUNT)
+ *
+ * If you take the fastest clock (1ns, or 1GHz to make the math work easier)
+ *    10ms is 10,000,000 clock ticks, which fits easy into a 32-bit counter
+ *    (32 bit counter is 4,294,967,296ns or 4.2 seconds) so, we don't need
+ *    to use TSCALE, and program it to zero (which is pass CCLK through).
+ *    If you feel like using it, try to keep HZ * TIMESCALE to some
+ *    value that divides easy (like power of 2).
+ */
+
+#define TIME_SCALE 1
+
+static void
+time_sched_init(irqreturn_t(*timer_routine) (int, void *))
+{
+	u32 tcount;
+
+	/* power up the timer, but don't enable it just yet */
+	bfin_write_TCNTL(1);
+	CSYNC();
+
+	/*
+	 * the TSCALE prescaler counter.
+	 */
+	bfin_write_TSCALE((TIME_SCALE - 1));
+
+	tcount = ((get_cclk() / (HZ * TIME_SCALE)) - 1);
+	bfin_write_TPERIOD(tcount);
+	bfin_write_TCOUNT(tcount);
+
+	/* now enable the timer */
+	CSYNC();
+
+	bfin_write_TCNTL(7);
+
+	bfin_timer_irq.handler = (irq_handler_t)timer_routine;
+	/* call setup_irq instead of request_irq because request_irq calls
+	 * kmalloc which has not been initialized yet
+	 */
+	setup_irq(IRQ_CORETMR, &bfin_timer_irq);
+}
+
+/*
+ * Should return useconds since last timer tick
+ */
+static unsigned long gettimeoffset(void)
+{
+	unsigned long offset;
+	unsigned long clocks_per_jiffy;
+
+	clocks_per_jiffy = bfin_read_TPERIOD();
+	offset =
+	    (clocks_per_jiffy -
+	     bfin_read_TCOUNT()) / (((clocks_per_jiffy + 1) * HZ) /
+				    USEC_PER_SEC);
+
+	/* Check if we just wrapped the counters and maybe missed a tick */
+	if ((bfin_read_ILAT() & (1 << IRQ_CORETMR))
+	    && (offset < (100000 / HZ / 2)))
+		offset += (USEC_PER_SEC / HZ);
+
+	return offset;
+}
+
+static inline int set_rtc_mmss(unsigned long nowtime)
+{
+	return 0;
+}
+
+/*
+ * timer_interrupt() needs to keep up the real-time clock,
+ * as well as call the "do_timer()" routine every clocktick
+ */
+#ifdef CONFIG_CORE_TIMER_IRQ_L1
+irqreturn_t timer_interrupt(int irq, void *dummy)__attribute__((l1_text));
+#endif
+
+irqreturn_t timer_interrupt(int irq, void *dummy)
+{
+	/* last time the cmos clock got updated */
+	static long last_rtc_update = 0;
+
+	write_seqlock(&xtime_lock);
+
+	do_timer(1);
+	do_leds();
+
+#ifndef CONFIG_SMP
+	update_process_times(user_mode(get_irq_regs()));
+#endif
+	profile_tick(CPU_PROFILING);
+
+	/*
+	 * If we have an externally synchronized Linux clock, then update
+	 * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
+	 * called as close as possible to 500 ms before the new second starts.
+	 */
+
+	if (ntp_synced() &&
+	    xtime.tv_sec > last_rtc_update + 660 &&
+	    (xtime.tv_nsec / NSEC_PER_USEC) >=
+	    500000 - ((unsigned)TICK_SIZE) / 2
+	    && (xtime.tv_nsec / NSEC_PER_USEC) <=
+	    500000 + ((unsigned)TICK_SIZE) / 2) {
+		if (set_rtc_mmss(xtime.tv_sec) == 0)
+			last_rtc_update = xtime.tv_sec;
+		else
+			/* Do it again in 60s. */
+			last_rtc_update = xtime.tv_sec - 600;
+	}
+	write_sequnlock(&xtime_lock);
+	return IRQ_HANDLED;
+}
+
+void __init time_init(void)
+{
+	time_t secs_since_1970 = (365 * 37 + 9) * 24 * 60 * 60;	/* 1 Jan 2007 */
+
+#ifdef CONFIG_RTC_DRV_BFIN
+	/* [#2663] hack to filter junk RTC values that would cause
+	 * userspace to have to deal with time values greater than
+	 * 2^31 seconds (which uClibc cannot cope with yet)
+	 */
+	if ((bfin_read_RTC_STAT() & 0xC0000000) == 0xC0000000) {
+		printk(KERN_NOTICE "bfin-rtc: invalid date; resetting\n");
+		bfin_write_RTC_STAT(0);
+	}
+#endif
+
+	/* Initialize xtime. From now on, xtime is updated with timer interrupts */
+	xtime.tv_sec = secs_since_1970;
+	xtime.tv_nsec = 0;
+
+	wall_to_monotonic.tv_sec = -xtime.tv_sec;
+
+	time_sched_init(timer_interrupt);
+}
+
+#ifndef CONFIG_GENERIC_TIME
+void do_gettimeofday(struct timeval *tv)
+{
+	unsigned long flags;
+	unsigned long seq;
+	unsigned long usec, sec;
+
+	do {
+		seq = read_seqbegin_irqsave(&xtime_lock, flags);
+		usec = gettimeoffset();
+		sec = xtime.tv_sec;
+		usec += (xtime.tv_nsec / NSEC_PER_USEC);
+	}
+	while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
+
+	while (usec >= USEC_PER_SEC) {
+		usec -= USEC_PER_SEC;
+		sec++;
+	}
+
+	tv->tv_sec = sec;
+	tv->tv_usec = usec;
+}
+EXPORT_SYMBOL(do_gettimeofday);
+
+int do_settimeofday(struct timespec *tv)
+{
+	time_t wtm_sec, sec = tv->tv_sec;
+	long wtm_nsec, nsec = tv->tv_nsec;
+
+	if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
+		return -EINVAL;
+
+	write_seqlock_irq(&xtime_lock);
+	/*
+	 * This is revolting. We need to set the xtime.tv_usec
+	 * correctly. However, the value in this location is
+	 * is value at the last tick.
+	 * Discover what correction gettimeofday
+	 * would have done, and then undo it!
+	 */
+	nsec -= (gettimeoffset() * NSEC_PER_USEC);
+
+	wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
+	wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
+
+	set_normalized_timespec(&xtime, sec, nsec);
+	set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);
+
+	ntp_clear();
+
+	write_sequnlock_irq(&xtime_lock);
+	clock_was_set();
+
+	return 0;
+}
+EXPORT_SYMBOL(do_settimeofday);
+#endif /* !CONFIG_GENERIC_TIME */
+
+/*
+ * Scheduler clock - returns current time in nanosec units.
+ */
+unsigned long long sched_clock(void)
+{
+	return (unsigned long long)jiffies *(NSEC_PER_SEC / HZ);
+}
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
new file mode 100644
index 0000000..9556b73
--- /dev/null
+++ b/arch/blackfin/kernel/traps.c
@@ -0,0 +1,649 @@
+/*
+ * File:         arch/blackfin/kernel/traps.c
+ * Based on:
+ * Author:       Hamish Macdonald
+ *
+ * Created:
+ * Description:  uses S/W interrupt 15 for the system calls
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <asm/uaccess.h>
+#include <asm/traps.h>
+#include <asm/cacheflush.h>
+#include <asm/blackfin.h>
+#include <asm/uaccess.h>
+#include <asm/irq_handler.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/kallsyms.h>
+
+#ifdef CONFIG_KGDB
+# include <linux/debugger.h>
+# include <linux/kgdb.h>
+#endif
+
+/* Initiate the event table handler */
+void __init trap_init(void)
+{
+	CSYNC();
+	bfin_write_EVT3(trap);
+	CSYNC();
+}
+
+asmlinkage void trap_c(struct pt_regs *fp);
+
+int kstack_depth_to_print = 48;
+
+static int printk_address(unsigned long address)
+{
+	struct vm_list_struct *vml;
+	struct task_struct *p;
+	struct mm_struct *mm;
+
+#ifdef CONFIG_KALLSYMS
+	unsigned long offset = 0, symsize;
+	const char *symname;
+	char *modname;
+	char *delim = ":";
+	char namebuf[128];
+
+	/* look up the address and see if we are in kernel space */
+	symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
+
+	if (symname) {
+		/* yeah! kernel space! */
+		if (!modname)
+			modname = delim = "";
+		return printk("<0x%p> { %s%s%s%s + 0x%lx }",
+		              (void*)address, delim, modname, delim, symname,
+		              (unsigned long)offset);
+
+	}
+#endif
+
+	/* looks like we're off in user-land, so let's walk all the
+	 * mappings of all our processes and see if we can't be a whee
+	 * bit more specific
+	 */
+	write_lock_irq(&tasklist_lock);
+	for_each_process(p) {
+		mm = get_task_mm(p);
+		if (!mm)
+			continue;
+
+		vml = mm->context.vmlist;
+		while (vml) {
+			struct vm_area_struct *vma = vml->vma;
+
+			if (address >= vma->vm_start && address < vma->vm_end) {
+				char *name = p->comm;
+				struct file *file = vma->vm_file;
+				if (file) {
+					char _tmpbuf[256];
+					name = d_path(file->f_dentry,
+					              file->f_vfsmnt,
+					              _tmpbuf,
+					              sizeof(_tmpbuf));
+				}
+
+				write_unlock_irq(&tasklist_lock);
+				return printk("<0x%p> [ %s + 0x%lx ]",
+				              (void*)address, name,
+				              (unsigned long)
+				                ((address - vma->vm_start) +
+				                 (vma->vm_pgoff << PAGE_SHIFT)));
+			}
+
+			vml = vml->next;
+		}
+	}
+	write_unlock_irq(&tasklist_lock);
+
+	/* we were unable to find this address anywhere */
+	return printk("[<0x%p>]", (void*)address);
+}
+
+#define trace_buffer_save(x) \
+	do { \
+		(x) = bfin_read_TBUFCTL(); \
+		bfin_write_TBUFCTL((x) & ~TBUFEN); \
+	} while (0)
+#define trace_buffer_restore(x) \
+	do { \
+		bfin_write_TBUFCTL((x));	\
+	} while (0)
+
+asmlinkage void trap_c(struct pt_regs *fp)
+{
+	int j, sig = 0;
+	siginfo_t info;
+	unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
+
+#ifdef CONFIG_KGDB
+# define CHK_DEBUGGER_TRAP() do { CHK_DEBUGGER(trapnr, sig, info.si_code, fp,); } while (0)
+# define CHK_DEBUGGER_TRAP_MAYBE() do { if (kgdb_connected) CHK_DEBUGGER_TRAP(); } while (0)
+#else
+# define CHK_DEBUGGER_TRAP() do { } while (0)
+# define CHK_DEBUGGER_TRAP_MAYBE() do { } while (0)
+#endif
+
+	trace_buffer_save(j);
+
+	/* trap_c() will be called for exceptions. During exceptions
+	 * processing, the pc value should be set with retx value.
+	 * With this change we can cleanup some code in signal.c- TODO
+	 */
+	fp->orig_pc = fp->retx;
+	/* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n",
+		trapnr, fp->ipend, fp->pc, fp->retx); */
+
+	/* send the appropriate signal to the user program */
+	switch (trapnr) {
+
+	/* This table works in conjuction with the one in ./mach-common/entry.S
+	 * Some exceptions are handled there (in assembly, in exception space)
+	 * Some are handled here, (in C, in interrupt space)
+	 * Some, like CPLB, are handled in both, where the normal path is
+	 * handled in assembly/exception space, and the error path is handled
+	 * here
+	 */
+
+	/* 0x00 - Linux Syscall, getting here is an error */
+	/* 0x01 - userspace gdb breakpoint, handled here */
+	case VEC_EXCPT01:
+		info.si_code = TRAP_ILLTRAP;
+		sig = SIGTRAP;
+		CHK_DEBUGGER_TRAP_MAYBE();
+		/* Check if this is a breakpoint in kernel space */
+		if (fp->ipend & 0xffc0)
+			return;
+		else
+			break;
+#ifdef CONFIG_KGDB
+	case VEC_EXCPT02 :		 /* gdb connection */
+		info.si_code = TRAP_ILLTRAP;
+		sig = SIGTRAP;
+		CHK_DEBUGGER_TRAP();
+		return;
+#else
+	/* 0x02 - User Defined, Caught by default */
+#endif
+	/* 0x03  - Atomic test and set */
+	case VEC_EXCPT03:
+		info.si_code = SEGV_STACKFLOW;
+		sig = SIGSEGV;
+		printk(KERN_EMERG EXC_0x03);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x04 - spinlock - handled by _ex_spinlock,
+		getting here is an error */
+	/* 0x05 - User Defined, Caught by default */
+	/* 0x06 - User Defined, Caught by default */
+	/* 0x07 - User Defined, Caught by default */
+	/* 0x08 - User Defined, Caught by default */
+	/* 0x09 - User Defined, Caught by default */
+	/* 0x0A - User Defined, Caught by default */
+	/* 0x0B - User Defined, Caught by default */
+	/* 0x0C - User Defined, Caught by default */
+	/* 0x0D - User Defined, Caught by default */
+	/* 0x0E - User Defined, Caught by default */
+	/* 0x0F - User Defined, Caught by default */
+	/* 0x10 HW Single step, handled here */
+	case VEC_STEP:
+		info.si_code = TRAP_STEP;
+		sig = SIGTRAP;
+		CHK_DEBUGGER_TRAP_MAYBE();
+		/* Check if this is a single step in kernel space */
+		if (fp->ipend & 0xffc0)
+			return;
+		else
+			break;
+	/* 0x11 - Trace Buffer Full, handled here */
+	case VEC_OVFLOW:
+		info.si_code = TRAP_TRACEFLOW;
+		sig = SIGTRAP;
+		printk(KERN_EMERG EXC_0x11);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x12 - Reserved, Caught by default */
+	/* 0x13 - Reserved, Caught by default */
+	/* 0x14 - Reserved, Caught by default */
+	/* 0x15 - Reserved, Caught by default */
+	/* 0x16 - Reserved, Caught by default */
+	/* 0x17 - Reserved, Caught by default */
+	/* 0x18 - Reserved, Caught by default */
+	/* 0x19 - Reserved, Caught by default */
+	/* 0x1A - Reserved, Caught by default */
+	/* 0x1B - Reserved, Caught by default */
+	/* 0x1C - Reserved, Caught by default */
+	/* 0x1D - Reserved, Caught by default */
+	/* 0x1E - Reserved, Caught by default */
+	/* 0x1F - Reserved, Caught by default */
+	/* 0x20 - Reserved, Caught by default */
+	/* 0x21 - Undefined Instruction, handled here */
+	case VEC_UNDEF_I:
+		info.si_code = ILL_ILLOPC;
+		sig = SIGILL;
+		printk(KERN_EMERG EXC_0x21);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x22 - Illegal Instruction Combination, handled here */
+	case VEC_ILGAL_I:
+		info.si_code = ILL_ILLPARAOP;
+		sig = SIGILL;
+		printk(KERN_EMERG EXC_0x22);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x23 - Data CPLB Protection Violation,
+		 normal case is handled in _cplb_hdr */
+	case VEC_CPLB_VL:
+		info.si_code = ILL_CPLB_VI;
+		sig = SIGILL;
+		printk(KERN_EMERG EXC_0x23);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x24 - Data access misaligned, handled here */
+	case VEC_MISALI_D:
+		info.si_code = BUS_ADRALN;
+		sig = SIGBUS;
+		printk(KERN_EMERG EXC_0x24);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x25 - Unrecoverable Event, handled here */
+	case VEC_UNCOV:
+		info.si_code = ILL_ILLEXCPT;
+		sig = SIGILL;
+		printk(KERN_EMERG EXC_0x25);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr,
+		error case is handled here */
+	case VEC_CPLB_M:
+		info.si_code = BUS_ADRALN;
+		sig = SIGBUS;
+		printk(KERN_EMERG EXC_0x26);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
+	case VEC_CPLB_MHIT:
+		info.si_code = ILL_CPLB_MULHIT;
+#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
+		sig = SIGSEGV;
+		printk(KERN_EMERG "\n\nNULL pointer access (probably)\n");
+#else
+		sig = SIGILL;
+		printk(KERN_EMERG EXC_0x27);
+#endif
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x28 - Emulation Watchpoint, handled here */
+	case VEC_WATCH:
+		info.si_code = TRAP_WATCHPT;
+		sig = SIGTRAP;
+		pr_debug(EXC_0x28);
+		CHK_DEBUGGER_TRAP_MAYBE();
+		/* Check if this is a watchpoint in kernel space */
+		if (fp->ipend & 0xffc0)
+			return;
+		else
+			break;
+#ifdef CONFIG_BF535
+	/* 0x29 - Instruction fetch access error (535 only) */
+	case VEC_ISTRU_VL:      /* ADSP-BF535 only (MH) */
+		info.si_code = BUS_OPFETCH;
+		sig = SIGBUS;
+		printk(KERN_EMERG "BF535: VEC_ISTRU_VL\n");
+		CHK_DEBUGGER_TRAP();
+		break;
+#else
+	/* 0x29 - Reserved, Caught by default */
+#endif
+	/* 0x2A - Instruction fetch misaligned, handled here */
+	case VEC_MISALI_I:
+		info.si_code = BUS_ADRALN;
+		sig = SIGBUS;
+		printk(KERN_EMERG EXC_0x2A);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x2B - Instruction CPLB protection Violation,
+		handled in _cplb_hdr */
+	case VEC_CPLB_I_VL:
+		info.si_code = ILL_CPLB_VI;
+		sig = SIGILL;
+		printk(KERN_EMERG EXC_0x2B);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */
+	case VEC_CPLB_I_M:
+		info.si_code = ILL_CPLB_MISS;
+		sig = SIGBUS;
+		printk(KERN_EMERG EXC_0x2C);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x2D - Instruction CPLB Multiple Hits, handled here */
+	case VEC_CPLB_I_MHIT:
+		info.si_code = ILL_CPLB_MULHIT;
+#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
+		sig = SIGSEGV;
+		printk(KERN_EMERG "\n\nJump to address 0 - 0x0fff\n");
+#else
+		sig = SIGILL;
+		printk(KERN_EMERG EXC_0x2D);
+#endif
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x2E - Illegal use of Supervisor Resource, handled here */
+	case VEC_ILL_RES:
+		info.si_code = ILL_PRVOPC;
+		sig = SIGILL;
+		printk(KERN_EMERG EXC_0x2E);
+		CHK_DEBUGGER_TRAP();
+		break;
+	/* 0x2F - Reserved, Caught by default */
+	/* 0x30 - Reserved, Caught by default */
+	/* 0x31 - Reserved, Caught by default */
+	/* 0x32 - Reserved, Caught by default */
+	/* 0x33 - Reserved, Caught by default */
+	/* 0x34 - Reserved, Caught by default */
+	/* 0x35 - Reserved, Caught by default */
+	/* 0x36 - Reserved, Caught by default */
+	/* 0x37 - Reserved, Caught by default */
+	/* 0x38 - Reserved, Caught by default */
+	/* 0x39 - Reserved, Caught by default */
+	/* 0x3A - Reserved, Caught by default */
+	/* 0x3B - Reserved, Caught by default */
+	/* 0x3C - Reserved, Caught by default */
+	/* 0x3D - Reserved, Caught by default */
+	/* 0x3E - Reserved, Caught by default */
+	/* 0x3F - Reserved, Caught by default */
+	default:
+		info.si_code = TRAP_ILLTRAP;
+		sig = SIGTRAP;
+		printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n",
+			(fp->seqstat & SEQSTAT_EXCAUSE));
+		CHK_DEBUGGER_TRAP();
+		break;
+	}
+
+	info.si_signo = sig;
+	info.si_errno = 0;
+	info.si_addr = (void *)fp->pc;
+	force_sig_info(sig, &info, current);
+	if (sig != 0 && sig != SIGTRAP) {
+		unsigned long stack;
+		dump_bfin_regs(fp, (void *)fp->retx);
+		dump_bfin_trace_buffer();
+		show_stack(current, &stack);
+		if (current->mm == NULL)
+			panic("Kernel exception");
+	}
+
+	/* if the address that we are about to return to is not valid, set it
+	 * to a valid address, if we have a current application or panic
+	 */
+	if (!(fp->pc <= physical_mem_end
+#if L1_CODE_LENGTH != 0
+	    || (fp->pc >= L1_CODE_START &&
+	        fp->pc <= (L1_CODE_START + L1_CODE_LENGTH))
+#endif
+	)) {
+		if (current->mm) {
+			fp->pc = current->mm->start_code;
+		} else {
+			printk(KERN_EMERG "I can't return to memory that doesn't exist - bad things happen\n");
+			panic("Help - I've fallen and can't get up\n");
+		}
+	}
+
+	trace_buffer_restore(j);
+	return;
+}
+
+/* Typical exception handling routines	*/
+
+void dump_bfin_trace_buffer(void)
+{
+	int tflags;
+	trace_buffer_save(tflags);
+
+	if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
+		int i;
+		printk(KERN_EMERG "Hardware Trace:\n");
+		for (i = 0; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
+			printk(KERN_EMERG "%2i Target : ", i);
+			printk_address((unsigned long)bfin_read_TBUF());
+			printk("\n" KERN_EMERG "   Source : ");
+			printk_address((unsigned long)bfin_read_TBUF());
+			printk("\n");
+		}
+	}
+
+	trace_buffer_restore(tflags);
+}
+EXPORT_SYMBOL(dump_bfin_trace_buffer);
+
+static void show_trace(struct task_struct *tsk, unsigned long *sp)
+{
+	unsigned long addr;
+
+	printk("\nCall Trace:");
+#ifdef CONFIG_KALLSYMS
+	printk("\n");
+#endif
+
+	while (!kstack_end(sp)) {
+		addr = *sp++;
+		/*
+		 * If the address is either in the text segment of the
+		 * kernel, or in the region which contains vmalloc'ed
+		 * memory, it *may* be the address of a calling
+		 * routine; if so, print it so that someone tracing
+		 * down the cause of the crash will be able to figure
+		 * out the call path that was taken.
+		 */
+		if (kernel_text_address(addr))
+			print_ip_sym(addr);
+	}
+
+	printk("\n");
+}
+
+void show_stack(struct task_struct *task, unsigned long *stack)
+{
+	unsigned long *endstack, addr;
+	int i;
+
+	/* Cannot call dump_bfin_trace_buffer() here as show_stack() is
+	 * called externally in some places in the kernel.
+	 */
+
+	if (!stack) {
+		if (task)
+			stack = (unsigned long *)task->thread.ksp;
+		else
+			stack = (unsigned long *)&stack;
+	}
+
+	addr = (unsigned long)stack;
+	endstack = (unsigned long *)PAGE_ALIGN(addr);
+
+	printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack);
+	for (i = 0; i < kstack_depth_to_print; i++) {
+		if (stack + 1 > endstack)
+			break;
+		if (i % 8 == 0)
+			printk("\n" KERN_EMERG "       ");
+		printk(" %08lx", *stack++);
+	}
+
+	show_trace(task, stack);
+}
+
+void dump_stack(void)
+{
+	unsigned long stack;
+	int tflags;
+	trace_buffer_save(tflags);
+	dump_bfin_trace_buffer();
+	show_stack(current, &stack);
+	trace_buffer_restore(tflags);
+}
+
+EXPORT_SYMBOL(dump_stack);
+
+void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
+{
+	if (current->pid) {
+		printk("\nCURRENT PROCESS:\n\n");
+		printk("COMM=%s PID=%d\n", current->comm, current->pid);
+	} else {
+		printk
+		    ("\nNo Valid pid - Either things are really messed up, or you are in the kernel\n");
+	}
+
+	if (current->mm) {
+		printk("TEXT = 0x%p-0x%p  DATA = 0x%p-0x%p\n"
+		       "BSS = 0x%p-0x%p   USER-STACK = 0x%p\n\n",
+		       (void*)current->mm->start_code,
+		       (void*)current->mm->end_code,
+		       (void*)current->mm->start_data,
+		       (void*)current->mm->end_data,
+		       (void*)current->mm->end_data,
+		       (void*)current->mm->brk,
+		       (void*)current->mm->start_stack);
+	}
+
+	printk("return address: 0x%p; contents of [PC-16...PC+8]:\n", retaddr);
+	if (retaddr != 0 && retaddr <= (void*)physical_mem_end
+#if L1_CODE_LENGTH != 0
+	    /* FIXME: Copy the code out of L1 Instruction SRAM through dma
+	       memcpy.  */
+	    && !(retaddr >= (void*)L1_CODE_START
+	         && retaddr < (void*)(L1_CODE_START + L1_CODE_LENGTH))
+#endif
+	) {
+		int i = 0;
+		unsigned short x = 0;
+		for (i = -16; i < 8; i++) {
+			if (get_user(x, (unsigned short *)retaddr + i))
+				break;
+#ifndef CONFIG_DEBUG_HWERR
+			/* If one of the last few instructions was a STI
+			 * it is likily that the error occured awhile ago
+			 * and we just noticed
+			 */
+			if (x >= 0x0040 && x <= 0x0047 && i <= 0)
+				panic("\n\nWARNING : You should reconfigure the kernel to turn on\n"
+					" 'Hardware error interrupt debugging'\n"
+					" The rest of this error is meanless\n");
+#endif
+
+			if (i == -8)
+				printk("\n");
+			if (i == 0)
+				printk("X\n");
+			printk("%04x ", x);
+		}
+	} else
+		printk("Cannot look at the [PC] for it is in unreadable L1 SRAM - sorry\n");
+
+	printk("\n\n");
+
+	printk("RETE:  %08lx  RETN: %08lx  RETX: %08lx  RETS: %08lx\n",
+	       fp->rete, fp->retn, fp->retx, fp->rets);
+	printk("IPEND: %04lx  SYSCFG: %04lx\n", fp->ipend, fp->syscfg);
+	printk("SEQSTAT: %08lx    SP: %08lx\n", (long)fp->seqstat, (long)fp);
+	printk("R0: %08lx    R1: %08lx    R2: %08lx    R3: %08lx\n",
+	       fp->r0, fp->r1, fp->r2, fp->r3);
+	printk("R4: %08lx    R5: %08lx    R6: %08lx    R7: %08lx\n",
+	       fp->r4, fp->r5, fp->r6, fp->r7);
+	printk("P0: %08lx    P1: %08lx    P2: %08lx    P3: %08lx\n",
+	       fp->p0, fp->p1, fp->p2, fp->p3);
+	printk("P4: %08lx    P5: %08lx    FP: %08lx\n", fp->p4, fp->p5, fp->fp);
+	printk("A0.w: %08lx    A0.x: %08lx    A1.w: %08lx    A1.x: %08lx\n",
+	       fp->a0w, fp->a0x, fp->a1w, fp->a1x);
+
+	printk("LB0: %08lx  LT0: %08lx  LC0: %08lx\n", fp->lb0, fp->lt0,
+	       fp->lc0);
+	printk("LB1: %08lx  LT1: %08lx  LC1: %08lx\n", fp->lb1, fp->lt1,
+	       fp->lc1);
+	printk("B0: %08lx  L0: %08lx  M0: %08lx  I0: %08lx\n", fp->b0, fp->l0,
+	       fp->m0, fp->i0);
+	printk("B1: %08lx  L1: %08lx  M1: %08lx  I1: %08lx\n", fp->b1, fp->l1,
+	       fp->m1, fp->i1);
+	printk("B2: %08lx  L2: %08lx  M2: %08lx  I2: %08lx\n", fp->b2, fp->l2,
+	       fp->m2, fp->i2);
+	printk("B3: %08lx  L3: %08lx  M3: %08lx  I3: %08lx\n", fp->b3, fp->l3,
+	       fp->m3, fp->i3);
+
+	printk("\nUSP: %08lx   ASTAT: %08lx\n", rdusp(), fp->astat);
+	if ((long)fp->seqstat & SEQSTAT_EXCAUSE) {
+		printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void*)bfin_read_DCPLB_FAULT_ADDR());
+		printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void*)bfin_read_ICPLB_FAULT_ADDR());
+	}
+
+	printk("\n\n");
+}
+
+#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
+asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
+#endif
+
+asmlinkage int sys_bfin_spinlock(int *spinlock)
+{
+	int ret = 0;
+	int tmp = 0;
+
+	local_irq_disable();
+	ret = get_user(tmp, spinlock);
+	if (ret == 0) {
+		if (tmp)
+			ret = 1;
+		tmp = 1;
+		put_user(tmp, spinlock);
+	}
+	local_irq_enable();
+	return ret;
+}
+
+void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
+{
+	switch (cplb_panic) {
+	case CPLB_NO_UNLOCKED:
+		printk(KERN_EMERG "All CPLBs are locked\n");
+		break;
+	case CPLB_PROT_VIOL:
+		return;
+	case CPLB_NO_ADDR_MATCH:
+		return;
+	case CPLB_UNKNOWN_ERR:
+		printk(KERN_EMERG "Unknown CPLB Exception\n");
+		break;
+	}
+
+	printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void*)bfin_read_DCPLB_FAULT_ADDR());
+	printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void*)bfin_read_ICPLB_FAULT_ADDR());
+	dump_bfin_regs(fp, (void *)fp->retx);
+	dump_stack();
+	panic("Unrecoverable event\n");
+}
diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S
new file mode 100644
index 0000000..6ae9ebb
--- /dev/null
+++ b/arch/blackfin/kernel/vmlinux.lds.S
@@ -0,0 +1,228 @@
+/*
+ * File:         arch/blackfin/kernel/vmlinux.lds.S
+ * Based on:     none - original work
+ * Author:
+ *
+ * Created:      Tue Sep 21 2004
+ * Description:  Master linker script for blackfin architecture
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#define VMLINUX_SYMBOL(_sym_) _##_sym_
+
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/mem_map.h>
+
+
+OUTPUT_FORMAT("elf32-bfin")
+ENTRY(__start)
+_jiffies = _jiffies_64;
+
+MEMORY
+{
+	ram         : ORIGIN = CONFIG_BOOT_LOAD, LENGTH = (CONFIG_MEM_SIZE * 1024 * 1024) - (CONFIG_BOOT_LOAD)
+	l1_data_a   : ORIGIN = L1_DATA_A_START,  LENGTH = L1_DATA_A_LENGTH
+	l1_data_b   : ORIGIN = L1_DATA_B_START,  LENGTH = L1_DATA_B_LENGTH
+	l1_code     : ORIGIN = L1_CODE_START,    LENGTH = L1_CODE_LENGTH
+	l1_scratch  : ORIGIN = L1_SCRATCH_START, LENGTH = L1_SCRATCH_LENGTH
+}
+
+SECTIONS
+{
+	. = CONFIG_BOOT_LOAD;
+
+	.text :
+	{
+		 _text = .;
+		 __stext = .;
+		*(.text)
+		SCHED_TEXT
+		*(.text.lock)
+		. = ALIGN(16);
+		  ___start___ex_table = .;
+		*(__ex_table)
+		 ___stop___ex_table = .;
+
+		*($code)
+		*(.rodata)
+		*(.rodata.*)
+		*(__vermagic)		/* Kernel version magic */
+		*(.rodata1)
+		*(.fixup)
+		*(.spinlock.text)
+
+		/* Kernel symbol table: Normal symbols */
+		. = ALIGN(4);
+		___start___ksymtab = .;
+		*(__ksymtab)
+		___stop___ksymtab = .;
+
+		/* Kernel symbol table: GPL-only symbols */
+		___start___ksymtab_gpl = .;
+		*(__ksymtab_gpl)
+		___stop___ksymtab_gpl = .;
+
+		/* Kernel symbol table: Normal unused symbols */		\
+		___start___ksymtab_unused = .;
+		*(__ksymtab_unused)
+		___stop___ksymtab_unused = .;
+
+		/* Kernel symbol table: GPL-only unused symbols */
+		___start___ksymtab_unused_gpl = .;
+		*(__ksymtab_unused_gpl)
+		___stop___ksymtab_unused_gpl = .;
+
+
+		/* Kernel symbol table: GPL-future symbols */
+		___start___ksymtab_gpl_future = .;
+		*(__ksymtab_gpl_future)
+		___stop___ksymtab_gpl_future = .;
+
+		/* Kernel symbol table: Normal symbols */
+		___start___kcrctab = .;
+		*(__kcrctab)
+		___stop___kcrctab = .;
+
+		/* Kernel symbol table: GPL-only symbols */
+		___start___kcrctab_gpl = .;
+		*(__kcrctab_gpl)
+		___stop___kcrctab_gpl = .;
+
+		/* Kernel symbol table: GPL-future symbols */
+		___start___kcrctab_gpl_future = .;
+		*(__kcrctab_gpl_future)
+		___stop___kcrctab_gpl_future = .;
+
+		/* Kernel symbol table: strings */
+		*(__ksymtab_strings)
+
+		 . = ALIGN(4);
+		__etext = .;
+	} > ram
+
+	.init :
+	{
+		. = ALIGN(4096);
+		___init_begin = .;
+		__sinittext = .;
+		*(.init.text)
+		__einittext = .;
+		*(.init.data)
+		. = ALIGN(16);
+		___setup_start = .;
+		*(.init.setup)
+		___setup_end = .;
+		___start___param = .;
+		*(__param)
+		___stop___param = .;
+		___initcall_start = .;
+		INITCALLS
+		___initcall_end = .;
+		___con_initcall_start = .;
+		*(.con_initcall.init)
+		___con_initcall_end = .;
+		___security_initcall_start = .;
+		*(.security_initcall.init)
+		___security_initcall_end = .;
+		. = ALIGN(4);
+		___initramfs_start = .;
+		*(.init.ramfs)
+		___initramfs_end = .;
+		. = ALIGN(4);
+		___init_end = .;
+	} > ram
+
+	 __l1_lma_start = .;
+
+	.text_l1 :
+	{
+		. = ALIGN(4);
+		 __stext_l1 = .;
+		*(.l1.text)
+
+		. = ALIGN(4);
+		 __etext_l1 = .;
+	} > l1_code AT > ram
+
+	.data_l1 :
+	{
+		. = ALIGN(4);
+		 __sdata_l1 = .;
+		*(.l1.data)
+		 __edata_l1 = .;
+
+		. = ALIGN(4);
+		 __sbss_l1 = .;
+		*(.l1.bss)
+
+		. = ALIGN(32);
+		*(.data_l1.cacheline_aligned)
+
+		. = ALIGN(4);
+		 __ebss_l1 = .;
+	} > l1_data_a AT > ram
+	.data_b_l1 :
+	{
+		. = ALIGN(4);
+		__sdata_b_l1 = .;
+		*(.l1.data.B)
+		__edata_b_l1 = .;
+
+		. = ALIGN(4);
+		__sbss_b_l1 = .;
+		*(.l1.bss.B)
+
+		. = ALIGN(4);
+		__ebss_b_l1 = .;
+	} > l1_data_b AT > ram
+
+	.data :
+	{
+		 __sdata = .;
+		. = ALIGN(0x2000);
+		*(.data.init_task)
+		*(.data)
+
+		. = ALIGN(32);
+		*(.data.cacheline_aligned)
+
+		. = ALIGN(0x2000);
+		__edata = .;
+	} > ram
+
+	/DISCARD/ : {			/* Exit code and data*/
+		*(.exit.text)
+		*(.exit.data)
+		*(.exitcall.exit)
+	} > ram
+
+	.bss :
+	{
+		. = ALIGN(4);
+		 ___bss_start = .;
+		*(.bss)
+		*(COMMON)
+		. = ALIGN(4);
+		 ___bss_stop = .;
+		 __end = .	;
+	} > ram
+}