diff --git a/arch/blackfin/include/asm/trace.h b/arch/blackfin/include/asm/trace.h
index dc0aa55ae773420fb426733e0b437d089580a692..395decd8bc3b76e10aa3631e078c1b49539ec068 100644
--- a/arch/blackfin/include/asm/trace.h
+++ b/arch/blackfin/include/asm/trace.h
@@ -23,6 +23,8 @@
 #ifndef __ASSEMBLY__
 extern unsigned long trace_buff_offset;
 extern unsigned long software_trace_buff[];
+extern void decode_address(char *buf, unsigned long address);
+extern bool get_instruction(unsigned short *val, unsigned short *address);
 
 /* Trace Macros for C files */
 
diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile
index 346a421f1562fad53d66485d3d8d7ea2b51935ff..b32a04a95d99739996d675d878cf8c348dfc654b 100644
--- a/arch/blackfin/kernel/Makefile
+++ b/arch/blackfin/kernel/Makefile
@@ -7,7 +7,8 @@ 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 traps.o irqchip.o dma-mapping.o flat.o \
-	fixed_code.o reboot.o bfin_gpio.o bfin_dma_5xx.o
+	fixed_code.o reboot.o bfin_gpio.o bfin_dma_5xx.o \
+	trace.o exception.o dumpstack.o
 
 ifeq ($(CONFIG_GENERIC_CLOCKEVENTS),y)
     obj-y += time-ts.o
diff --git a/arch/blackfin/kernel/dumpstack.c b/arch/blackfin/kernel/dumpstack.c
new file mode 100644
index 0000000000000000000000000000000000000000..e81392c9d1db9d9b8f158c78234f63d55814a97c
--- /dev/null
+++ b/arch/blackfin/kernel/dumpstack.c
@@ -0,0 +1,181 @@
+/* Provide basic stack dumping functions
+ *
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later
+ */
+
+#include <linux/kernel.h>
+#include <linux/thread_info.h>
+#include <linux/mm.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+#include <asm/trace.h>
+
+/*
+ * Checks to see if the address pointed to is either a
+ * 16-bit CALL instruction, or a 32-bit CALL instruction
+ */
+static bool is_bfin_call(unsigned short *addr)
+{
+	unsigned short opcode = 0, *ins_addr;
+	ins_addr = (unsigned short *)addr;
+
+	if (!get_instruction(&opcode, ins_addr))
+		return false;
+
+	if ((opcode >= 0x0060 && opcode <= 0x0067) ||
+	    (opcode >= 0x0070 && opcode <= 0x0077))
+		return true;
+
+	ins_addr--;
+	if (!get_instruction(&opcode, ins_addr))
+		return false;
+
+	if (opcode >= 0xE300 && opcode <= 0xE3FF)
+		return true;
+
+	return false;
+
+}
+
+void show_stack(struct task_struct *task, unsigned long *stack)
+{
+#ifdef CONFIG_PRINTK
+	unsigned int *addr, *endstack, *fp = 0, *frame;
+	unsigned short *ins_addr;
+	char buf[150];
+	unsigned int i, j, ret_addr, frame_no = 0;
+
+	/*
+	 * If we have been passed a specific stack, use that one otherwise
+	 *    if we have been passed a task structure, use that, otherwise
+	 *    use the stack of where the variable "stack" exists
+	 */
+
+	if (stack == NULL) {
+		if (task) {
+			/* We know this is a kernel stack, so this is the start/end */
+			stack = (unsigned long *)task->thread.ksp;
+			endstack = (unsigned int *)(((unsigned int)(stack) & ~(THREAD_SIZE - 1)) + THREAD_SIZE);
+		} else {
+			/* print out the existing stack info */
+			stack = (unsigned long *)&stack;
+			endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
+		}
+	} else
+		endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
+
+	printk(KERN_NOTICE "Stack info:\n");
+	decode_address(buf, (unsigned int)stack);
+	printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf);
+
+	if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) {
+		printk(KERN_NOTICE "Invalid stack pointer\n");
+		return;
+	}
+
+	/* First thing is to look for a frame pointer */
+	for (addr = (unsigned int *)((unsigned int)stack & ~0xF); addr < endstack; addr++) {
+		if (*addr & 0x1)
+			continue;
+		ins_addr = (unsigned short *)*addr;
+		ins_addr--;
+		if (is_bfin_call(ins_addr))
+			fp = addr - 1;
+
+		if (fp) {
+			/* Let's check to see if it is a frame pointer */
+			while (fp >= (addr - 1) && fp < endstack
+			       && fp && ((unsigned int) fp & 0x3) == 0)
+				fp = (unsigned int *)*fp;
+			if (fp == 0 || fp == endstack) {
+				fp = addr - 1;
+				break;
+			}
+			fp = 0;
+		}
+	}
+	if (fp) {
+		frame = fp;
+		printk(KERN_NOTICE " FP: (0x%p)\n", fp);
+	} else
+		frame = 0;
+
+	/*
+	 * Now that we think we know where things are, we
+	 * walk the stack again, this time printing things out
+	 * incase there is no frame pointer, we still look for
+	 * valid return addresses
+	 */
+
+	/* First time print out data, next time, print out symbols */
+	for (j = 0; j <= 1; j++) {
+		if (j)
+			printk(KERN_NOTICE "Return addresses in stack:\n");
+		else
+			printk(KERN_NOTICE " Memory from 0x%08lx to %p", ((long unsigned int)stack & ~0xF), endstack);
+
+		fp = frame;
+		frame_no = 0;
+
+		for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
+		     addr < endstack; addr++, i++) {
+
+			ret_addr = 0;
+			if (!j && i % 8 == 0)
+				printk(KERN_NOTICE "%p:", addr);
+
+			/* if it is an odd address, or zero, just skip it */
+			if (*addr & 0x1 || !*addr)
+				goto print;
+
+			ins_addr = (unsigned short *)*addr;
+
+			/* Go back one instruction, and see if it is a CALL */
+			ins_addr--;
+			ret_addr = is_bfin_call(ins_addr);
+ print:
+			if (!j && stack == (unsigned long *)addr)
+				printk("[%08x]", *addr);
+			else if (ret_addr)
+				if (j) {
+					decode_address(buf, (unsigned int)*addr);
+					if (frame == addr) {
+						printk(KERN_NOTICE "   frame %2i : %s\n", frame_no, buf);
+						continue;
+					}
+					printk(KERN_NOTICE "    address : %s\n", buf);
+				} else
+					printk("<%08x>", *addr);
+			else if (fp == addr) {
+				if (j)
+					frame = addr+1;
+				else
+					printk("(%08x)", *addr);
+
+				fp = (unsigned int *)*addr;
+				frame_no++;
+
+			} else if (!j)
+				printk(" %08x ", *addr);
+		}
+		if (!j)
+			printk("\n");
+	}
+#endif
+}
+EXPORT_SYMBOL(show_stack);
+
+void dump_stack(void)
+{
+	unsigned long stack;
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
+	int tflags;
+#endif
+	trace_buffer_save(tflags);
+	dump_bfin_trace_buffer();
+	show_stack(current, &stack);
+	trace_buffer_restore(tflags);
+}
+EXPORT_SYMBOL(dump_stack);
diff --git a/arch/blackfin/kernel/exception.c b/arch/blackfin/kernel/exception.c
new file mode 100644
index 0000000000000000000000000000000000000000..9208b5fd51864713ad8394a3035e6e2a3c287dcf
--- /dev/null
+++ b/arch/blackfin/kernel/exception.c
@@ -0,0 +1,45 @@
+/* Basic functions for adding/removing custom exception handlers
+ *
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later
+ */
+
+#include <linux/module.h>
+#include <asm/irq_handler.h>
+
+int bfin_request_exception(unsigned int exception, void (*handler)(void))
+{
+	void (*curr_handler)(void);
+
+	if (exception > 0x3F)
+		return -EINVAL;
+
+	curr_handler = ex_table[exception];
+
+	if (curr_handler != ex_replaceable)
+		return -EBUSY;
+
+	ex_table[exception] = handler;
+
+	return 0;
+}
+EXPORT_SYMBOL(bfin_request_exception);
+
+int bfin_free_exception(unsigned int exception, void (*handler)(void))
+{
+	void (*curr_handler)(void);
+
+	if (exception > 0x3F)
+		return -EINVAL;
+
+	curr_handler = ex_table[exception];
+
+	if (curr_handler != handler)
+		return -EBUSY;
+
+	ex_table[exception] = ex_replaceable;
+
+	return 0;
+}
+EXPORT_SYMBOL(bfin_free_exception);
diff --git a/arch/blackfin/kernel/sys_bfin.c b/arch/blackfin/kernel/sys_bfin.c
index 2e7f8e10bf87109083f43f73411327ae5223f724..bdc1e2f0da32383420a46ef6c1e3fe93a805c0ea 100644
--- a/arch/blackfin/kernel/sys_bfin.c
+++ b/arch/blackfin/kernel/sys_bfin.c
@@ -47,3 +47,26 @@ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr,
 }
 EXPORT_SYMBOL(get_fb_unmapped_area);
 #endif
+
+/* Needed for legacy userspace atomic emulation */
+static DEFINE_SPINLOCK(bfin_spinlock_lock);
+
+#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
+__attribute__((l1_text))
+#endif
+asmlinkage int sys_bfin_spinlock(int *p)
+{
+	int ret, tmp = 0;
+
+	spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */
+	ret = get_user(tmp, p);
+	if (likely(ret == 0)) {
+		if (unlikely(tmp))
+			ret = 1;
+		else
+			put_user(1, p);
+	}
+	spin_unlock(&bfin_spinlock_lock);
+
+	return ret;
+}
diff --git a/arch/blackfin/kernel/trace.c b/arch/blackfin/kernel/trace.c
new file mode 100644
index 0000000000000000000000000000000000000000..3a268c3ed47e0d3b230a9f97b4e96ac9d775f0b7
--- /dev/null
+++ b/arch/blackfin/kernel/trace.c
@@ -0,0 +1,594 @@
+/* provide some functions which dump the trace buffer, in a nice way for people
+ * to read it, and understand what is going on
+ *
+ * Copyright 2004-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later
+ */
+
+#include <linux/kernel.h>
+#include <linux/hardirq.h>
+#include <linux/thread_info.h>
+#include <linux/mm.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+#include <linux/kallsyms.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <asm/dma.h>
+#include <asm/trace.h>
+#include <asm/fixed_code.h>
+#include <asm/traps.h>
+
+#ifdef CONFIG_DEBUG_VERBOSE
+#define verbose_printk(fmt, arg...) \
+	printk(fmt, ##arg)
+#else
+#define verbose_printk(fmt, arg...) \
+	({ if (0) printk(fmt, ##arg); 0; })
+#endif
+
+
+void decode_address(char *buf, unsigned long address)
+{
+#ifdef CONFIG_DEBUG_VERBOSE
+	struct task_struct *p;
+	struct mm_struct *mm;
+	unsigned long flags, offset;
+	unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
+	struct rb_node *n;
+
+#ifdef CONFIG_KALLSYMS
+	unsigned long symsize;
+	const char *symname;
+	char *modname;
+	char *delim = ":";
+	char namebuf[128];
+#endif
+
+	buf += sprintf(buf, "<0x%08lx> ", address);
+
+#ifdef CONFIG_KALLSYMS
+	/* 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 = "";
+		sprintf(buf, "{ %s%s%s%s + 0x%lx }",
+			delim, modname, delim, symname,
+			(unsigned long)offset);
+		return;
+	}
+#endif
+
+	if (address >= FIXED_CODE_START && address < FIXED_CODE_END) {
+		/* Problem in fixed code section? */
+		strcat(buf, "/* Maybe fixed code section */");
+		return;
+
+	} else if (address < CONFIG_BOOT_LOAD) {
+		/* Problem somewhere before the kernel start address */
+		strcat(buf, "/* Maybe null pointer? */");
+		return;
+
+	} else if (address >= COREMMR_BASE) {
+		strcat(buf, "/* core mmrs */");
+		return;
+
+	} else if (address >= SYSMMR_BASE) {
+		strcat(buf, "/* system mmrs */");
+		return;
+
+	} else if (address >= L1_ROM_START && address < L1_ROM_START + L1_ROM_LENGTH) {
+		strcat(buf, "/* on-chip L1 ROM */");
+		return;
+	}
+
+	/*
+	 * Don't walk any of the vmas if we are oopsing, it has been known
+	 * to cause problems - corrupt vmas (kernel crashes) cause double faults
+	 */
+	if (oops_in_progress) {
+		strcat(buf, "/* kernel dynamic memory (maybe user-space) */");
+		return;
+	}
+
+	/* 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_irqsave(&tasklist_lock, flags);
+	for_each_process(p) {
+		mm = (in_atomic ? p->mm : get_task_mm(p));
+		if (!mm)
+			continue;
+
+		if (!down_read_trylock(&mm->mmap_sem)) {
+			if (!in_atomic)
+				mmput(mm);
+			continue;
+		}
+
+		for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) {
+			struct vm_area_struct *vma;
+
+			vma = rb_entry(n, struct vm_area_struct, vm_rb);
+
+			if (address >= vma->vm_start && address < vma->vm_end) {
+				char _tmpbuf[256];
+				char *name = p->comm;
+				struct file *file = vma->vm_file;
+
+				if (file) {
+					char *d_name = d_path(&file->f_path, _tmpbuf,
+						      sizeof(_tmpbuf));
+					if (!IS_ERR(d_name))
+						name = d_name;
+				}
+
+				/* FLAT does not have its text aligned to the start of
+				 * the map while FDPIC ELF does ...
+				 */
+
+				/* before we can check flat/fdpic, we need to
+				 * make sure current is valid
+				 */
+				if ((unsigned long)current >= FIXED_CODE_START &&
+				    !((unsigned long)current & 0x3)) {
+					if (current->mm &&
+					    (address > current->mm->start_code) &&
+					    (address < current->mm->end_code))
+						offset = address - current->mm->start_code;
+					else
+						offset = (address - vma->vm_start) +
+							 (vma->vm_pgoff << PAGE_SHIFT);
+
+					sprintf(buf, "[ %s + 0x%lx ]", name, offset);
+				} else
+					sprintf(buf, "[ %s vma:0x%lx-0x%lx]",
+						name, vma->vm_start, vma->vm_end);
+
+				up_read(&mm->mmap_sem);
+				if (!in_atomic)
+					mmput(mm);
+
+				if (buf[0] == '\0')
+					sprintf(buf, "[ %s ] dynamic memory", name);
+
+				goto done;
+			}
+		}
+
+		up_read(&mm->mmap_sem);
+		if (!in_atomic)
+			mmput(mm);
+	}
+
+	/*
+	 * we were unable to find this address anywhere,
+	 * or some MMs were skipped because they were in use.
+	 */
+	sprintf(buf, "/* kernel dynamic memory */");
+
+done:
+	write_unlock_irqrestore(&tasklist_lock, flags);
+#else
+	sprintf(buf, " ");
+#endif
+}
+
+#define EXPAND_LEN ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 256 - 1)
+
+/*
+ * Similar to get_user, do some address checking, then dereference
+ * Return true on success, false on bad address
+ */
+bool get_instruction(unsigned short *val, unsigned short *address)
+{
+	unsigned long addr = (unsigned long)address;
+
+	/* Check for odd addresses */
+	if (addr & 0x1)
+		return false;
+
+	/* MMR region will never have instructions */
+	if (addr >= SYSMMR_BASE)
+		return false;
+
+	switch (bfin_mem_access_type(addr, 2)) {
+	case BFIN_MEM_ACCESS_CORE:
+	case BFIN_MEM_ACCESS_CORE_ONLY:
+		*val = *address;
+		return true;
+	case BFIN_MEM_ACCESS_DMA:
+		dma_memcpy(val, address, 2);
+		return true;
+	case BFIN_MEM_ACCESS_ITEST:
+		isram_memcpy(val, address, 2);
+		return true;
+	default: /* invalid access */
+		return false;
+	}
+}
+
+/*
+ * decode the instruction if we are printing out the trace, as it
+ * makes things easier to follow, without running it through objdump
+ * These are the normal instructions which cause change of flow, which
+ * would be at the source of the trace buffer
+ */
+#if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_BFIN_HWTRACE_ON)
+static void decode_instruction(unsigned short *address)
+{
+	unsigned short opcode;
+
+	if (get_instruction(&opcode, address)) {
+		if (opcode == 0x0010)
+			verbose_printk("RTS");
+		else if (opcode == 0x0011)
+			verbose_printk("RTI");
+		else if (opcode == 0x0012)
+			verbose_printk("RTX");
+		else if (opcode == 0x0013)
+			verbose_printk("RTN");
+		else if (opcode == 0x0014)
+			verbose_printk("RTE");
+		else if (opcode == 0x0025)
+			verbose_printk("EMUEXCPT");
+		else if (opcode >= 0x0040 && opcode <= 0x0047)
+			verbose_printk("STI R%i", opcode & 7);
+		else if (opcode >= 0x0050 && opcode <= 0x0057)
+			verbose_printk("JUMP (P%i)", opcode & 7);
+		else if (opcode >= 0x0060 && opcode <= 0x0067)
+			verbose_printk("CALL (P%i)", opcode & 7);
+		else if (opcode >= 0x0070 && opcode <= 0x0077)
+			verbose_printk("CALL (PC+P%i)", opcode & 7);
+		else if (opcode >= 0x0080 && opcode <= 0x0087)
+			verbose_printk("JUMP (PC+P%i)", opcode & 7);
+		else if (opcode >= 0x0090 && opcode <= 0x009F)
+			verbose_printk("RAISE 0x%x", opcode & 0xF);
+		else if (opcode >= 0x00A0 && opcode <= 0x00AF)
+			verbose_printk("EXCPT 0x%x", opcode & 0xF);
+		else if ((opcode >= 0x1000 && opcode <= 0x13FF) || (opcode >= 0x1800 && opcode <= 0x1BFF))
+			verbose_printk("IF !CC JUMP");
+		else if ((opcode >= 0x1400 && opcode <= 0x17ff) || (opcode >= 0x1c00 && opcode <= 0x1fff))
+			verbose_printk("IF CC JUMP");
+		else if (opcode >= 0x2000 && opcode <= 0x2fff)
+			verbose_printk("JUMP.S");
+		else if (opcode >= 0xe080 && opcode <= 0xe0ff)
+			verbose_printk("LSETUP");
+		else if (opcode >= 0xe200 && opcode <= 0xe2ff)
+			verbose_printk("JUMP.L");
+		else if (opcode >= 0xe300 && opcode <= 0xe3ff)
+			verbose_printk("CALL pcrel");
+		else
+			verbose_printk("0x%04x", opcode);
+	}
+
+}
+#endif
+
+void dump_bfin_trace_buffer(void)
+{
+#ifdef CONFIG_DEBUG_VERBOSE
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
+	int tflags, i = 0;
+	char buf[150];
+	unsigned short *addr;
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
+	int j, index;
+#endif
+
+	trace_buffer_save(tflags);
+
+	printk(KERN_NOTICE "Hardware Trace:\n");
+
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
+	printk(KERN_NOTICE "WARNING: Expanded trace turned on - can not trace exceptions\n");
+#endif
+
+	if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
+		for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
+			decode_address(buf, (unsigned long)bfin_read_TBUF());
+			printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
+			addr = (unsigned short *)bfin_read_TBUF();
+			decode_address(buf, (unsigned long)addr);
+			printk(KERN_NOTICE "     Source : %s ", buf);
+			decode_instruction(addr);
+			printk("\n");
+		}
+	}
+
+#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
+	if (trace_buff_offset)
+		index = trace_buff_offset / 4;
+	else
+		index = EXPAND_LEN;
+
+	j = (1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 128;
+	while (j) {
+		decode_address(buf, software_trace_buff[index]);
+		printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
+		index -= 1;
+		if (index < 0)
+			index = EXPAND_LEN;
+		decode_address(buf, software_trace_buff[index]);
+		printk(KERN_NOTICE "     Source : %s ", buf);
+		decode_instruction((unsigned short *)software_trace_buff[index]);
+		printk("\n");
+		index -= 1;
+		if (index < 0)
+			index = EXPAND_LEN;
+		j--;
+		i++;
+	}
+#endif
+
+	trace_buffer_restore(tflags);
+#endif
+#endif
+}
+EXPORT_SYMBOL(dump_bfin_trace_buffer);
+
+void dump_bfin_process(struct pt_regs *fp)
+{
+#ifdef CONFIG_DEBUG_VERBOSE
+	/* We should be able to look at fp->ipend, but we don't push it on the
+	 * stack all the time, so do this until we fix that */
+	unsigned int context = bfin_read_IPEND();
+
+	if (oops_in_progress)
+		verbose_printk(KERN_EMERG "Kernel OOPS in progress\n");
+
+	if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR)
+		verbose_printk(KERN_NOTICE "HW Error context\n");
+	else if (context & 0x0020)
+		verbose_printk(KERN_NOTICE "Deferred Exception context\n");
+	else if (context & 0x3FC0)
+		verbose_printk(KERN_NOTICE "Interrupt context\n");
+	else if (context & 0x4000)
+		verbose_printk(KERN_NOTICE "Deferred Interrupt context\n");
+	else if (context & 0x8000)
+		verbose_printk(KERN_NOTICE "Kernel process context\n");
+
+	/* Because we are crashing, and pointers could be bad, we check things
+	 * pretty closely before we use them
+	 */
+	if ((unsigned long)current >= FIXED_CODE_START &&
+	    !((unsigned long)current & 0x3) && current->pid) {
+		verbose_printk(KERN_NOTICE "CURRENT PROCESS:\n");
+		if (current->comm >= (char *)FIXED_CODE_START)
+			verbose_printk(KERN_NOTICE "COMM=%s PID=%d",
+				current->comm, current->pid);
+		else
+			verbose_printk(KERN_NOTICE "COMM= invalid");
+
+		printk(KERN_CONT " CPU=%d\n", current_thread_info()->cpu);
+		if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START)
+			verbose_printk(KERN_NOTICE
+				"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);
+		else
+			verbose_printk(KERN_NOTICE "invalid mm\n");
+	} else
+		verbose_printk(KERN_NOTICE
+			       "No Valid process in current context\n");
+#endif
+}
+
+void dump_bfin_mem(struct pt_regs *fp)
+{
+#ifdef CONFIG_DEBUG_VERBOSE
+	unsigned short *addr, *erraddr, val = 0, err = 0;
+	char sti = 0, buf[6];
+
+	erraddr = (void *)fp->pc;
+
+	verbose_printk(KERN_NOTICE "return address: [0x%p]; contents of:", erraddr);
+
+	for (addr = (unsigned short *)((unsigned long)erraddr & ~0xF) - 0x10;
+	     addr < (unsigned short *)((unsigned long)erraddr & ~0xF) + 0x10;
+	     addr++) {
+		if (!((unsigned long)addr & 0xF))
+			verbose_printk(KERN_NOTICE "0x%p: ", addr);
+
+		if (!get_instruction(&val, addr)) {
+				val = 0;
+				sprintf(buf, "????");
+		} else
+			sprintf(buf, "%04x", val);
+
+		if (addr == erraddr) {
+			verbose_printk("[%s]", buf);
+			err = val;
+		} else
+			verbose_printk(" %s ", buf);
+
+		/* Do any previous instructions turn on interrupts? */
+		if (addr <= erraddr &&				/* in the past */
+		    ((val >= 0x0040 && val <= 0x0047) ||	/* STI instruction */
+		      val == 0x017b))				/* [SP++] = RETI */
+			sti = 1;
+	}
+
+	verbose_printk("\n");
+
+	/* Hardware error interrupts can be deferred */
+	if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR &&
+	    oops_in_progress)){
+		verbose_printk(KERN_NOTICE "Looks like this was a deferred error - sorry\n");
+#ifndef CONFIG_DEBUG_HWERR
+		verbose_printk(KERN_NOTICE
+"The remaining message may be meaningless\n"
+"You should enable CONFIG_DEBUG_HWERR to get a better idea where it came from\n");
+#else
+		/* If we are handling only one peripheral interrupt
+		 * and current mm and pid are valid, and the last error
+		 * was in that user space process's text area
+		 * print it out - because that is where the problem exists
+		 */
+		if ((!(((fp)->ipend & ~0x30) & (((fp)->ipend & ~0x30) - 1))) &&
+		     (current->pid && current->mm)) {
+			/* And the last RETI points to the current userspace context */
+			if ((fp + 1)->pc >= current->mm->start_code &&
+			    (fp + 1)->pc <= current->mm->end_code) {
+				verbose_printk(KERN_NOTICE "It might be better to look around here :\n");
+				verbose_printk(KERN_NOTICE "-------------------------------------------\n");
+				show_regs(fp + 1);
+				verbose_printk(KERN_NOTICE "-------------------------------------------\n");
+			}
+		}
+#endif
+	}
+#endif
+}
+
+void show_regs(struct pt_regs *fp)
+{
+#ifdef CONFIG_DEBUG_VERBOSE
+	char buf[150];
+	struct irqaction *action;
+	unsigned int i;
+	unsigned long flags = 0;
+	unsigned int cpu = raw_smp_processor_id();
+	unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
+
+	verbose_printk(KERN_NOTICE "\n");
+	if (CPUID != bfin_cpuid())
+		verbose_printk(KERN_NOTICE "Compiled for cpu family 0x%04x (Rev %d), "
+			"but running on:0x%04x (Rev %d)\n",
+			CPUID, bfin_compiled_revid(), bfin_cpuid(), bfin_revid());
+
+	verbose_printk(KERN_NOTICE "ADSP-%s-0.%d",
+		CPU, bfin_compiled_revid());
+
+	if (bfin_compiled_revid() !=  bfin_revid())
+		verbose_printk("(Detected 0.%d)", bfin_revid());
+
+	verbose_printk(" %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n",
+		get_cclk()/1000000, get_sclk()/1000000,
+#ifdef CONFIG_MPU
+		"mpu on"
+#else
+		"mpu off"
+#endif
+		);
+
+	verbose_printk(KERN_NOTICE "%s", linux_banner);
+
+	verbose_printk(KERN_NOTICE "\nSEQUENCER STATUS:\t\t%s\n", print_tainted());
+	verbose_printk(KERN_NOTICE " SEQSTAT: %08lx  IPEND: %04lx  IMASK: %04lx  SYSCFG: %04lx\n",
+		(long)fp->seqstat, fp->ipend, cpu_pda[raw_smp_processor_id()].ex_imask, fp->syscfg);
+	if (fp->ipend & EVT_IRPTEN)
+		verbose_printk(KERN_NOTICE "  Global Interrupts Disabled (IPEND[4])\n");
+	if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG13 | EVT_IVG12 | EVT_IVG11 |
+			EVT_IVG10 | EVT_IVG9 | EVT_IVG8 | EVT_IVG7 | EVT_IVTMR)))
+		verbose_printk(KERN_NOTICE "  Peripheral interrupts masked off\n");
+	if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG15 | EVT_IVG14)))
+		verbose_printk(KERN_NOTICE "  Kernel interrupts masked off\n");
+	if ((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) {
+		verbose_printk(KERN_NOTICE "  HWERRCAUSE: 0x%lx\n",
+			(fp->seqstat & SEQSTAT_HWERRCAUSE) >> 14);
+#ifdef EBIU_ERRMST
+		/* If the error was from the EBIU, print it out */
+		if (bfin_read_EBIU_ERRMST() & CORE_ERROR) {
+			verbose_printk(KERN_NOTICE "  EBIU Error Reason  : 0x%04x\n",
+				bfin_read_EBIU_ERRMST());
+			verbose_printk(KERN_NOTICE "  EBIU Error Address : 0x%08x\n",
+				bfin_read_EBIU_ERRADD());
+		}
+#endif
+	}
+	verbose_printk(KERN_NOTICE "  EXCAUSE   : 0x%lx\n",
+		fp->seqstat & SEQSTAT_EXCAUSE);
+	for (i = 2; i <= 15 ; i++) {
+		if (fp->ipend & (1 << i)) {
+			if (i != 4) {
+				decode_address(buf, bfin_read32(EVT0 + 4*i));
+				verbose_printk(KERN_NOTICE "  physical IVG%i asserted : %s\n", i, buf);
+			} else
+				verbose_printk(KERN_NOTICE "  interrupts disabled\n");
+		}
+	}
+
+	/* if no interrupts are going off, don't print this out */
+	if (fp->ipend & ~0x3F) {
+		for (i = 0; i < (NR_IRQS - 1); i++) {
+			if (!in_atomic)
+				raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
+
+			action = irq_desc[i].action;
+			if (!action)
+				goto unlock;
+
+			decode_address(buf, (unsigned int)action->handler);
+			verbose_printk(KERN_NOTICE "  logical irq %3d mapped  : %s", i, buf);
+			for (action = action->next; action; action = action->next) {
+				decode_address(buf, (unsigned int)action->handler);
+				verbose_printk(", %s", buf);
+			}
+			verbose_printk("\n");
+unlock:
+			if (!in_atomic)
+				raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+		}
+	}
+
+	decode_address(buf, fp->rete);
+	verbose_printk(KERN_NOTICE " RETE: %s\n", buf);
+	decode_address(buf, fp->retn);
+	verbose_printk(KERN_NOTICE " RETN: %s\n", buf);
+	decode_address(buf, fp->retx);
+	verbose_printk(KERN_NOTICE " RETX: %s\n", buf);
+	decode_address(buf, fp->rets);
+	verbose_printk(KERN_NOTICE " RETS: %s\n", buf);
+	decode_address(buf, fp->pc);
+	verbose_printk(KERN_NOTICE " PC  : %s\n", buf);
+
+	if (((long)fp->seqstat &  SEQSTAT_EXCAUSE) &&
+	    (((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) {
+		decode_address(buf, cpu_pda[cpu].dcplb_fault_addr);
+		verbose_printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf);
+		decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
+		verbose_printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf);
+	}
+
+	verbose_printk(KERN_NOTICE "PROCESSOR STATE:\n");
+	verbose_printk(KERN_NOTICE " R0 : %08lx    R1 : %08lx    R2 : %08lx    R3 : %08lx\n",
+		fp->r0, fp->r1, fp->r2, fp->r3);
+	verbose_printk(KERN_NOTICE " R4 : %08lx    R5 : %08lx    R6 : %08lx    R7 : %08lx\n",
+		fp->r4, fp->r5, fp->r6, fp->r7);
+	verbose_printk(KERN_NOTICE " P0 : %08lx    P1 : %08lx    P2 : %08lx    P3 : %08lx\n",
+		fp->p0, fp->p1, fp->p2, fp->p3);
+	verbose_printk(KERN_NOTICE " P4 : %08lx    P5 : %08lx    FP : %08lx    SP : %08lx\n",
+		fp->p4, fp->p5, fp->fp, (long)fp);
+	verbose_printk(KERN_NOTICE " LB0: %08lx    LT0: %08lx    LC0: %08lx\n",
+		fp->lb0, fp->lt0, fp->lc0);
+	verbose_printk(KERN_NOTICE " LB1: %08lx    LT1: %08lx    LC1: %08lx\n",
+		fp->lb1, fp->lt1, fp->lc1);
+	verbose_printk(KERN_NOTICE " B0 : %08lx    L0 : %08lx    M0 : %08lx    I0 : %08lx\n",
+		fp->b0, fp->l0, fp->m0, fp->i0);
+	verbose_printk(KERN_NOTICE " B1 : %08lx    L1 : %08lx    M1 : %08lx    I1 : %08lx\n",
+		fp->b1, fp->l1, fp->m1, fp->i1);
+	verbose_printk(KERN_NOTICE " B2 : %08lx    L2 : %08lx    M2 : %08lx    I2 : %08lx\n",
+		fp->b2, fp->l2, fp->m2, fp->i2);
+	verbose_printk(KERN_NOTICE " B3 : %08lx    L3 : %08lx    M3 : %08lx    I3 : %08lx\n",
+		fp->b3, fp->l3, fp->m3, fp->i3);
+	verbose_printk(KERN_NOTICE "A0.w: %08lx   A0.x: %08lx   A1.w: %08lx   A1.x: %08lx\n",
+		fp->a0w, fp->a0x, fp->a1w, fp->a1x);
+
+	verbose_printk(KERN_NOTICE "USP : %08lx  ASTAT: %08lx\n",
+		rdusp(), fp->astat);
+
+	verbose_printk(KERN_NOTICE "\n");
+#endif
+}
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index ba70c4bc2699e7a288b36a591930106b23d84d32..891cc39f7eec4f909b8e625dcba08892613a20a4 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -1,20 +1,16 @@
 /*
- * Copyright 2004-2009 Analog Devices Inc.
+ * Main exception handling logic.
+ *
+ * Copyright 2004-2010 Analog Devices Inc.
  *
  * Licensed under the GPL-2 or later
  */
 
 #include <linux/bug.h>
 #include <linux/uaccess.h>
-#include <linux/interrupt.h>
 #include <linux/module.h>
-#include <linux/kallsyms.h>
-#include <linux/fs.h>
-#include <linux/rbtree.h>
 #include <asm/traps.h>
-#include <asm/cacheflush.h>
 #include <asm/cplb.h>
-#include <asm/dma.h>
 #include <asm/blackfin.h>
 #include <asm/irq_handler.h>
 #include <linux/irq.h>
@@ -62,194 +58,6 @@ void __init trap_init(void)
 	CSYNC();
 }
 
-static void decode_address(char *buf, unsigned long address)
-{
-#ifdef CONFIG_DEBUG_VERBOSE
-	struct task_struct *p;
-	struct mm_struct *mm;
-	unsigned long flags, offset;
-	unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
-	struct rb_node *n;
-
-#ifdef CONFIG_KALLSYMS
-	unsigned long symsize;
-	const char *symname;
-	char *modname;
-	char *delim = ":";
-	char namebuf[128];
-#endif
-
-	buf += sprintf(buf, "<0x%08lx> ", address);
-
-#ifdef CONFIG_KALLSYMS
-	/* 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 = "";
-		sprintf(buf, "{ %s%s%s%s + 0x%lx }",
-		        delim, modname, delim, symname,
-		        (unsigned long)offset);
-		return;
-	}
-#endif
-
-	if (address >= FIXED_CODE_START && address < FIXED_CODE_END) {
-		/* Problem in fixed code section? */
-		strcat(buf, "/* Maybe fixed code section */");
-		return;
-
-	} else if (address < CONFIG_BOOT_LOAD) {
-		/* Problem somewhere before the kernel start address */
-		strcat(buf, "/* Maybe null pointer? */");
-		return;
-
-	} else if (address >= COREMMR_BASE) {
-		strcat(buf, "/* core mmrs */");
-		return;
-
-	} else if (address >= SYSMMR_BASE) {
-		strcat(buf, "/* system mmrs */");
-		return;
-
-	} else if (address >= L1_ROM_START && address < L1_ROM_START + L1_ROM_LENGTH) {
-		strcat(buf, "/* on-chip L1 ROM */");
-		return;
-	}
-
-	/*
-	 * Don't walk any of the vmas if we are oopsing, it has been known
-	 * to cause problems - corrupt vmas (kernel crashes) cause double faults
-	 */
-	if (oops_in_progress) {
-		strcat(buf, "/* kernel dynamic memory (maybe user-space) */");
-		return;
-	}
-
-	/* 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_irqsave(&tasklist_lock, flags);
-	for_each_process(p) {
-		mm = (in_atomic ? p->mm : get_task_mm(p));
-		if (!mm)
-			continue;
-
-		if (!down_read_trylock(&mm->mmap_sem)) {
-			if (!in_atomic)
-				mmput(mm);
-			continue;
-		}
-
-		for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) {
-			struct vm_area_struct *vma;
-
-			vma = rb_entry(n, struct vm_area_struct, vm_rb);
-
-			if (address >= vma->vm_start && address < vma->vm_end) {
-				char _tmpbuf[256];
-				char *name = p->comm;
-				struct file *file = vma->vm_file;
-
-				if (file) {
-					char *d_name = d_path(&file->f_path, _tmpbuf,
-						      sizeof(_tmpbuf));
-					if (!IS_ERR(d_name))
-						name = d_name;
-				}
-
-				/* FLAT does not have its text aligned to the start of
-				 * the map while FDPIC ELF does ...
-				 */
-
-				/* before we can check flat/fdpic, we need to
-				 * make sure current is valid
-				 */
-				if ((unsigned long)current >= FIXED_CODE_START &&
-				    !((unsigned long)current & 0x3)) {
-					if (current->mm &&
-					    (address > current->mm->start_code) &&
-					    (address < current->mm->end_code))
-						offset = address - current->mm->start_code;
-					else
-						offset = (address - vma->vm_start) +
-							 (vma->vm_pgoff << PAGE_SHIFT);
-
-					sprintf(buf, "[ %s + 0x%lx ]", name, offset);
-				} else
-					sprintf(buf, "[ %s vma:0x%lx-0x%lx]",
-						name, vma->vm_start, vma->vm_end);
-
-				up_read(&mm->mmap_sem);
-				if (!in_atomic)
-					mmput(mm);
-
-				if (buf[0] == '\0')
-					sprintf(buf, "[ %s ] dynamic memory", name);
-
-				goto done;
-			}
-		}
-
-		up_read(&mm->mmap_sem);
-		if (!in_atomic)
-			mmput(mm);
-	}
-
-	/*
-	 * we were unable to find this address anywhere,
-	 * or some MMs were skipped because they were in use.
-	 */
-	sprintf(buf, "/* kernel dynamic memory */");
-
-done:
-	write_unlock_irqrestore(&tasklist_lock, flags);
-#else
-	sprintf(buf, " ");
-#endif
-}
-
-asmlinkage void double_fault_c(struct pt_regs *fp)
-{
-#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
-	int j;
-	trace_buffer_save(j);
-#endif
-
-	console_verbose();
-	oops_in_progress = 1;
-#ifdef CONFIG_DEBUG_VERBOSE
-	printk(KERN_EMERG "Double Fault\n");
-#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
-	if (((long)fp->seqstat &  SEQSTAT_EXCAUSE) == VEC_UNCOV) {
-		unsigned int cpu = raw_smp_processor_id();
-		char buf[150];
-		decode_address(buf, cpu_pda[cpu].retx_doublefault);
-		printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n",
-			(unsigned int)cpu_pda[cpu].seqstat_doublefault & SEQSTAT_EXCAUSE, buf);
-		decode_address(buf, cpu_pda[cpu].dcplb_doublefault_addr);
-		printk(KERN_NOTICE "   DCPLB_FAULT_ADDR: %s\n", buf);
-		decode_address(buf, cpu_pda[cpu].icplb_doublefault_addr);
-		printk(KERN_NOTICE "   ICPLB_FAULT_ADDR: %s\n", buf);
-
-		decode_address(buf, fp->retx);
-		printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf);
-	} else
-#endif
-	{
-		dump_bfin_process(fp);
-		dump_bfin_mem(fp);
-		show_regs(fp);
-		dump_bfin_trace_buffer();
-	}
-#endif
-	panic("Double Fault - unrecoverable event");
-
-}
-
 static int kernel_mode_regs(struct pt_regs *regs)
 {
 	return regs->ipend & 0xffc0;
@@ -672,659 +480,44 @@ asmlinkage notrace void trap_c(struct pt_regs *fp)
 	trace_buffer_restore(j);
 }
 
-/* Typical exception handling routines	*/
-
-#define EXPAND_LEN ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 256 - 1)
-
-/*
- * Similar to get_user, do some address checking, then dereference
- * Return true on success, false on bad address
- */
-static bool get_instruction(unsigned short *val, unsigned short *address)
-{
-	unsigned long addr = (unsigned long)address;
-
-	/* Check for odd addresses */
-	if (addr & 0x1)
-		return false;
-
-	/* MMR region will never have instructions */
-	if (addr >= SYSMMR_BASE)
-		return false;
-
-	switch (bfin_mem_access_type(addr, 2)) {
-		case BFIN_MEM_ACCESS_CORE:
-		case BFIN_MEM_ACCESS_CORE_ONLY:
-			*val = *address;
-			return true;
-		case BFIN_MEM_ACCESS_DMA:
-			dma_memcpy(val, address, 2);
-			return true;
-		case BFIN_MEM_ACCESS_ITEST:
-			isram_memcpy(val, address, 2);
-			return true;
-		default: /* invalid access */
-			return false;
-	}
-}
-
-/*
- * decode the instruction if we are printing out the trace, as it
- * makes things easier to follow, without running it through objdump
- * These are the normal instructions which cause change of flow, which
- * would be at the source of the trace buffer
- */
-#if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_BFIN_HWTRACE_ON)
-static void decode_instruction(unsigned short *address)
-{
-	unsigned short opcode;
-
-	if (get_instruction(&opcode, address)) {
-		if (opcode == 0x0010)
-			verbose_printk("RTS");
-		else if (opcode == 0x0011)
-			verbose_printk("RTI");
-		else if (opcode == 0x0012)
-			verbose_printk("RTX");
-		else if (opcode == 0x0013)
-			verbose_printk("RTN");
-		else if (opcode == 0x0014)
-			verbose_printk("RTE");
-		else if (opcode == 0x0025)
-			verbose_printk("EMUEXCPT");
-		else if (opcode >= 0x0040 && opcode <= 0x0047)
-			verbose_printk("STI R%i", opcode & 7);
-		else if (opcode >= 0x0050 && opcode <= 0x0057)
-			verbose_printk("JUMP (P%i)", opcode & 7);
-		else if (opcode >= 0x0060 && opcode <= 0x0067)
-			verbose_printk("CALL (P%i)", opcode & 7);
-		else if (opcode >= 0x0070 && opcode <= 0x0077)
-			verbose_printk("CALL (PC+P%i)", opcode & 7);
-		else if (opcode >= 0x0080 && opcode <= 0x0087)
-			verbose_printk("JUMP (PC+P%i)", opcode & 7);
-		else if (opcode >= 0x0090 && opcode <= 0x009F)
-			verbose_printk("RAISE 0x%x", opcode & 0xF);
-		else if (opcode >= 0x00A0 && opcode <= 0x00AF)
-			verbose_printk("EXCPT 0x%x", opcode & 0xF);
-		else if ((opcode >= 0x1000 && opcode <= 0x13FF) || (opcode >= 0x1800 && opcode <= 0x1BFF))
-			verbose_printk("IF !CC JUMP");
-		else if ((opcode >= 0x1400 && opcode <= 0x17ff) || (opcode >= 0x1c00 && opcode <= 0x1fff))
-			verbose_printk("IF CC JUMP");
-		else if (opcode >= 0x2000 && opcode <= 0x2fff)
-			verbose_printk("JUMP.S");
-		else if (opcode >= 0xe080 && opcode <= 0xe0ff)
-			verbose_printk("LSETUP");
-		else if (opcode >= 0xe200 && opcode <= 0xe2ff)
-			verbose_printk("JUMP.L");
-		else if (opcode >= 0xe300 && opcode <= 0xe3ff)
-			verbose_printk("CALL pcrel");
-		else
-			verbose_printk("0x%04x", opcode);
-	}
-
-}
-#endif
-
-void dump_bfin_trace_buffer(void)
-{
-#ifdef CONFIG_DEBUG_VERBOSE
-#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
-	int tflags, i = 0;
-	char buf[150];
-	unsigned short *addr;
-#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
-	int j, index;
-#endif
-
-	trace_buffer_save(tflags);
-
-	printk(KERN_NOTICE "Hardware Trace:\n");
-
-#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
-	printk(KERN_NOTICE "WARNING: Expanded trace turned on - can not trace exceptions\n");
-#endif
-
-	if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
-		for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
-			decode_address(buf, (unsigned long)bfin_read_TBUF());
-			printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
-			addr = (unsigned short *)bfin_read_TBUF();
-			decode_address(buf, (unsigned long)addr);
-			printk(KERN_NOTICE "     Source : %s ", buf);
-			decode_instruction(addr);
-			printk("\n");
-		}
-	}
-
-#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
-	if (trace_buff_offset)
-		index = trace_buff_offset / 4;
-	else
-		index = EXPAND_LEN;
-
-	j = (1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 128;
-	while (j) {
-		decode_address(buf, software_trace_buff[index]);
-		printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
-		index -= 1;
-		if (index < 0 )
-			index = EXPAND_LEN;
-		decode_address(buf, software_trace_buff[index]);
-		printk(KERN_NOTICE "     Source : %s ", buf);
-		decode_instruction((unsigned short *)software_trace_buff[index]);
-		printk("\n");
-		index -= 1;
-		if (index < 0)
-			index = EXPAND_LEN;
-		j--;
-		i++;
-	}
-#endif
-
-	trace_buffer_restore(tflags);
-#endif
-#endif
-}
-EXPORT_SYMBOL(dump_bfin_trace_buffer);
-
-#ifdef CONFIG_BUG
-int is_valid_bugaddr(unsigned long addr)
-{
-	unsigned short opcode;
-
-	if (!get_instruction(&opcode, (unsigned short *)addr))
-		return 0;
-
-	return opcode == BFIN_BUG_OPCODE;
-}
-#endif
-
-/*
- * Checks to see if the address pointed to is either a
- * 16-bit CALL instruction, or a 32-bit CALL instruction
- */
-static bool is_bfin_call(unsigned short *addr)
-{
-	unsigned short opcode = 0, *ins_addr;
-	ins_addr = (unsigned short *)addr;
-
-	if (!get_instruction(&opcode, ins_addr))
-		return false;
-
-	if ((opcode >= 0x0060 && opcode <= 0x0067) ||
-	    (opcode >= 0x0070 && opcode <= 0x0077))
-		return true;
-
-	ins_addr--;
-	if (!get_instruction(&opcode, ins_addr))
-		return false;
-
-	if (opcode >= 0xE300 && opcode <= 0xE3FF)
-		return true;
-
-	return false;
-
-}
-
-void show_stack(struct task_struct *task, unsigned long *stack)
-{
-#ifdef CONFIG_PRINTK
-	unsigned int *addr, *endstack, *fp = 0, *frame;
-	unsigned short *ins_addr;
-	char buf[150];
-	unsigned int i, j, ret_addr, frame_no = 0;
-
-	/*
-	 * If we have been passed a specific stack, use that one otherwise
-	 *    if we have been passed a task structure, use that, otherwise
-	 *    use the stack of where the variable "stack" exists
-	 */
-
-	if (stack == NULL) {
-		if (task) {
-			/* We know this is a kernel stack, so this is the start/end */
-			stack = (unsigned long *)task->thread.ksp;
-			endstack = (unsigned int *)(((unsigned int)(stack) & ~(THREAD_SIZE - 1)) + THREAD_SIZE);
-		} else {
-			/* print out the existing stack info */
-			stack = (unsigned long *)&stack;
-			endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
-		}
-	} else
-		endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
-
-	printk(KERN_NOTICE "Stack info:\n");
-	decode_address(buf, (unsigned int)stack);
-	printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf);
-
-	if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) {
-		printk(KERN_NOTICE "Invalid stack pointer\n");
-		return;
-	}
-
-	/* First thing is to look for a frame pointer */
-	for (addr = (unsigned int *)((unsigned int)stack & ~0xF); addr < endstack; addr++) {
-		if (*addr & 0x1)
-			continue;
-		ins_addr = (unsigned short *)*addr;
-		ins_addr--;
-		if (is_bfin_call(ins_addr))
-			fp = addr - 1;
-
-		if (fp) {
-			/* Let's check to see if it is a frame pointer */
-			while (fp >= (addr - 1) && fp < endstack
-			       && fp && ((unsigned int) fp & 0x3) == 0)
-				fp = (unsigned int *)*fp;
-			if (fp == 0 || fp == endstack) {
-				fp = addr - 1;
-				break;
-			}
-			fp = 0;
-		}
-	}
-	if (fp) {
-		frame = fp;
-		printk(KERN_NOTICE " FP: (0x%p)\n", fp);
-	} else
-		frame = 0;
-
-	/*
-	 * Now that we think we know where things are, we
-	 * walk the stack again, this time printing things out
-	 * incase there is no frame pointer, we still look for
-	 * valid return addresses
-	 */
-
-	/* First time print out data, next time, print out symbols */
-	for (j = 0; j <= 1; j++) {
-		if (j)
-			printk(KERN_NOTICE "Return addresses in stack:\n");
-		else
-			printk(KERN_NOTICE " Memory from 0x%08lx to %p", ((long unsigned int)stack & ~0xF), endstack);
-
-		fp = frame;
-		frame_no = 0;
-
-		for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
-		     addr < endstack; addr++, i++) {
-
-			ret_addr = 0;
-			if (!j && i % 8 == 0)
-				printk(KERN_NOTICE "%p:",addr);
-
-			/* if it is an odd address, or zero, just skip it */
-			if (*addr & 0x1 || !*addr)
-				goto print;
-
-			ins_addr = (unsigned short *)*addr;
-
-			/* Go back one instruction, and see if it is a CALL */
-			ins_addr--;
-			ret_addr = is_bfin_call(ins_addr);
- print:
-			if (!j && stack == (unsigned long *)addr)
-				printk("[%08x]", *addr);
-			else if (ret_addr)
-				if (j) {
-					decode_address(buf, (unsigned int)*addr);
-					if (frame == addr) {
-						printk(KERN_NOTICE "   frame %2i : %s\n", frame_no, buf);
-						continue;
-					}
-					printk(KERN_NOTICE "    address : %s\n", buf);
-				} else
-					printk("<%08x>", *addr);
-			else if (fp == addr) {
-				if (j)
-					frame = addr+1;
-				else
-					printk("(%08x)", *addr);
-
-				fp = (unsigned int *)*addr;
-				frame_no++;
-
-			} else if (!j)
-				printk(" %08x ", *addr);
-		}
-		if (!j)
-			printk("\n");
-	}
-#endif
-}
-EXPORT_SYMBOL(show_stack);
-
-void dump_stack(void)
+asmlinkage void double_fault_c(struct pt_regs *fp)
 {
-	unsigned long stack;
 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
-	int tflags;
+	int j;
+	trace_buffer_save(j);
 #endif
-	trace_buffer_save(tflags);
-	dump_bfin_trace_buffer();
-	show_stack(current, &stack);
-	trace_buffer_restore(tflags);
-}
-EXPORT_SYMBOL(dump_stack);
 
-void dump_bfin_process(struct pt_regs *fp)
-{
+	console_verbose();
+	oops_in_progress = 1;
 #ifdef CONFIG_DEBUG_VERBOSE
-	/* We should be able to look at fp->ipend, but we don't push it on the
-	 * stack all the time, so do this until we fix that */
-	unsigned int context = bfin_read_IPEND();
-
-	if (oops_in_progress)
-		verbose_printk(KERN_EMERG "Kernel OOPS in progress\n");
-
-	if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR)
-		verbose_printk(KERN_NOTICE "HW Error context\n");
-	else if (context & 0x0020)
-		verbose_printk(KERN_NOTICE "Deferred Exception context\n");
-	else if (context & 0x3FC0)
-		verbose_printk(KERN_NOTICE "Interrupt context\n");
-	else if (context & 0x4000)
-		verbose_printk(KERN_NOTICE "Deferred Interrupt context\n");
-	else if (context & 0x8000)
-		verbose_printk(KERN_NOTICE "Kernel process context\n");
-
-	/* Because we are crashing, and pointers could be bad, we check things
-	 * pretty closely before we use them
-	 */
-	if ((unsigned long)current >= FIXED_CODE_START &&
-	    !((unsigned long)current & 0x3) && current->pid) {
-		verbose_printk(KERN_NOTICE "CURRENT PROCESS:\n");
-		if (current->comm >= (char *)FIXED_CODE_START)
-			verbose_printk(KERN_NOTICE "COMM=%s PID=%d",
-				current->comm, current->pid);
-		else
-			verbose_printk(KERN_NOTICE "COMM= invalid");
+	printk(KERN_EMERG "Double Fault\n");
+#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
+	if (((long)fp->seqstat &  SEQSTAT_EXCAUSE) == VEC_UNCOV) {
+		unsigned int cpu = raw_smp_processor_id();
+		char buf[150];
+		decode_address(buf, cpu_pda[cpu].retx_doublefault);
+		printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n",
+			(unsigned int)cpu_pda[cpu].seqstat_doublefault & SEQSTAT_EXCAUSE, buf);
+		decode_address(buf, cpu_pda[cpu].dcplb_doublefault_addr);
+		printk(KERN_NOTICE "   DCPLB_FAULT_ADDR: %s\n", buf);
+		decode_address(buf, cpu_pda[cpu].icplb_doublefault_addr);
+		printk(KERN_NOTICE "   ICPLB_FAULT_ADDR: %s\n", buf);
 
-		printk(KERN_CONT " CPU=%d\n", current_thread_info()->cpu);
-		if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START)
-			verbose_printk(KERN_NOTICE
-				"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);
-		else
-			verbose_printk(KERN_NOTICE "invalid mm\n");
+		decode_address(buf, fp->retx);
+		printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf);
 	} else
-		verbose_printk(KERN_NOTICE
-			       "No Valid process in current context\n");
-#endif
-}
-
-void dump_bfin_mem(struct pt_regs *fp)
-{
-#ifdef CONFIG_DEBUG_VERBOSE
-	unsigned short *addr, *erraddr, val = 0, err = 0;
-	char sti = 0, buf[6];
-
-	erraddr = (void *)fp->pc;
-
-	verbose_printk(KERN_NOTICE "return address: [0x%p]; contents of:", erraddr);
-
-	for (addr = (unsigned short *)((unsigned long)erraddr & ~0xF) - 0x10;
-	     addr < (unsigned short *)((unsigned long)erraddr & ~0xF) + 0x10;
-	     addr++) {
-		if (!((unsigned long)addr & 0xF))
-			verbose_printk(KERN_NOTICE "0x%p: ", addr);
-
-		if (!get_instruction(&val, addr)) {
-				val = 0;
-				sprintf(buf, "????");
-		} else
-			sprintf(buf, "%04x", val);
-
-		if (addr == erraddr) {
-			verbose_printk("[%s]", buf);
-			err = val;
-		} else
-			verbose_printk(" %s ", buf);
-
-		/* Do any previous instructions turn on interrupts? */
-		if (addr <= erraddr &&				/* in the past */
-		    ((val >= 0x0040 && val <= 0x0047) ||	/* STI instruction */
-		      val == 0x017b))				/* [SP++] = RETI */
-			sti = 1;
-	}
-
-	verbose_printk("\n");
-
-	/* Hardware error interrupts can be deferred */
-	if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR &&
-	    oops_in_progress)){
-		verbose_printk(KERN_NOTICE "Looks like this was a deferred error - sorry\n");
-#ifndef CONFIG_DEBUG_HWERR
-		verbose_printk(KERN_NOTICE
-"The remaining message may be meaningless\n"
-"You should enable CONFIG_DEBUG_HWERR to get a better idea where it came from\n");
-#else
-		/* If we are handling only one peripheral interrupt
-		 * and current mm and pid are valid, and the last error
-		 * was in that user space process's text area
-		 * print it out - because that is where the problem exists
-		 */
-		if ((!(((fp)->ipend & ~0x30) & (((fp)->ipend & ~0x30) - 1))) &&
-		     (current->pid && current->mm)) {
-			/* And the last RETI points to the current userspace context */
-			if ((fp + 1)->pc >= current->mm->start_code &&
-			    (fp + 1)->pc <= current->mm->end_code) {
-				verbose_printk(KERN_NOTICE "It might be better to look around here :\n");
-				verbose_printk(KERN_NOTICE "-------------------------------------------\n");
-				show_regs(fp + 1);
-				verbose_printk(KERN_NOTICE "-------------------------------------------\n");
-			}
-		}
-#endif
-	}
-#endif
-}
-
-void show_regs(struct pt_regs *fp)
-{
-#ifdef CONFIG_DEBUG_VERBOSE
-	char buf [150];
-	struct irqaction *action;
-	unsigned int i;
-	unsigned long flags = 0;
-	unsigned int cpu = raw_smp_processor_id();
-	unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
-
-	verbose_printk(KERN_NOTICE "\n");
-	if (CPUID != bfin_cpuid())
-		verbose_printk(KERN_NOTICE "Compiled for cpu family 0x%04x (Rev %d), "
-			"but running on:0x%04x (Rev %d)\n",
-			CPUID, bfin_compiled_revid(), bfin_cpuid(), bfin_revid());
-
-	verbose_printk(KERN_NOTICE "ADSP-%s-0.%d",
-		CPU, bfin_compiled_revid());
-
-	if (bfin_compiled_revid() !=  bfin_revid())
-		verbose_printk("(Detected 0.%d)", bfin_revid());
-
-	verbose_printk(" %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n",
-		get_cclk()/1000000, get_sclk()/1000000,
-#ifdef CONFIG_MPU
-		"mpu on"
-#else
-		"mpu off"
 #endif
-		);
-
-	verbose_printk(KERN_NOTICE "%s", linux_banner);
-
-	verbose_printk(KERN_NOTICE "\nSEQUENCER STATUS:\t\t%s\n", print_tainted());
-	verbose_printk(KERN_NOTICE " SEQSTAT: %08lx  IPEND: %04lx  IMASK: %04lx  SYSCFG: %04lx\n",
-		(long)fp->seqstat, fp->ipend, cpu_pda[raw_smp_processor_id()].ex_imask, fp->syscfg);
-	if (fp->ipend & EVT_IRPTEN)
-		verbose_printk(KERN_NOTICE "  Global Interrupts Disabled (IPEND[4])\n");
-	if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG13 | EVT_IVG12 | EVT_IVG11 |
-			EVT_IVG10 | EVT_IVG9 | EVT_IVG8 | EVT_IVG7 | EVT_IVTMR)))
-		verbose_printk(KERN_NOTICE "  Peripheral interrupts masked off\n");
-	if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG15 | EVT_IVG14)))
-		verbose_printk(KERN_NOTICE "  Kernel interrupts masked off\n");
-	if ((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) {
-		verbose_printk(KERN_NOTICE "  HWERRCAUSE: 0x%lx\n",
-			(fp->seqstat & SEQSTAT_HWERRCAUSE) >> 14);
-#ifdef EBIU_ERRMST
-		/* If the error was from the EBIU, print it out */
-		if (bfin_read_EBIU_ERRMST() & CORE_ERROR) {
-			verbose_printk(KERN_NOTICE "  EBIU Error Reason  : 0x%04x\n",
-				bfin_read_EBIU_ERRMST());
-			verbose_printk(KERN_NOTICE "  EBIU Error Address : 0x%08x\n",
-				bfin_read_EBIU_ERRADD());
-		}
-#endif
-	}
-	verbose_printk(KERN_NOTICE "  EXCAUSE   : 0x%lx\n",
-		fp->seqstat & SEQSTAT_EXCAUSE);
-	for (i = 2; i <= 15 ; i++) {
-		if (fp->ipend & (1 << i)) {
-			if (i != 4) {
-				decode_address(buf, bfin_read32(EVT0 + 4*i));
-				verbose_printk(KERN_NOTICE "  physical IVG%i asserted : %s\n", i, buf);
-			} else
-				verbose_printk(KERN_NOTICE "  interrupts disabled\n");
-		}
-	}
-
-	/* if no interrupts are going off, don't print this out */
-	if (fp->ipend & ~0x3F) {
-		for (i = 0; i < (NR_IRQS - 1); i++) {
-			if (!in_atomic)
-				raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
-
-			action = irq_desc[i].action;
-			if (!action)
-				goto unlock;
-
-			decode_address(buf, (unsigned int)action->handler);
-			verbose_printk(KERN_NOTICE "  logical irq %3d mapped  : %s", i, buf);
-			for (action = action->next; action; action = action->next) {
-				decode_address(buf, (unsigned int)action->handler);
-				verbose_printk(", %s", buf);
-			}
-			verbose_printk("\n");
-unlock:
-			if (!in_atomic)
-				raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
-		}
-	}
-
-	decode_address(buf, fp->rete);
-	verbose_printk(KERN_NOTICE " RETE: %s\n", buf);
-	decode_address(buf, fp->retn);
-	verbose_printk(KERN_NOTICE " RETN: %s\n", buf);
-	decode_address(buf, fp->retx);
-	verbose_printk(KERN_NOTICE " RETX: %s\n", buf);
-	decode_address(buf, fp->rets);
-	verbose_printk(KERN_NOTICE " RETS: %s\n", buf);
-	decode_address(buf, fp->pc);
-	verbose_printk(KERN_NOTICE " PC  : %s\n", buf);
-
-	if (((long)fp->seqstat &  SEQSTAT_EXCAUSE) &&
-	    (((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) {
-		decode_address(buf, cpu_pda[cpu].dcplb_fault_addr);
-		verbose_printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf);
-		decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
-		verbose_printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf);
+	{
+		dump_bfin_process(fp);
+		dump_bfin_mem(fp);
+		show_regs(fp);
+		dump_bfin_trace_buffer();
 	}
-
-	verbose_printk(KERN_NOTICE "PROCESSOR STATE:\n");
-	verbose_printk(KERN_NOTICE " R0 : %08lx    R1 : %08lx    R2 : %08lx    R3 : %08lx\n",
-		fp->r0, fp->r1, fp->r2, fp->r3);
-	verbose_printk(KERN_NOTICE " R4 : %08lx    R5 : %08lx    R6 : %08lx    R7 : %08lx\n",
-		fp->r4, fp->r5, fp->r6, fp->r7);
-	verbose_printk(KERN_NOTICE " P0 : %08lx    P1 : %08lx    P2 : %08lx    P3 : %08lx\n",
-		fp->p0, fp->p1, fp->p2, fp->p3);
-	verbose_printk(KERN_NOTICE " P4 : %08lx    P5 : %08lx    FP : %08lx    SP : %08lx\n",
-		fp->p4, fp->p5, fp->fp, (long)fp);
-	verbose_printk(KERN_NOTICE " LB0: %08lx    LT0: %08lx    LC0: %08lx\n",
-		fp->lb0, fp->lt0, fp->lc0);
-	verbose_printk(KERN_NOTICE " LB1: %08lx    LT1: %08lx    LC1: %08lx\n",
-		fp->lb1, fp->lt1, fp->lc1);
-	verbose_printk(KERN_NOTICE " B0 : %08lx    L0 : %08lx    M0 : %08lx    I0 : %08lx\n",
-		fp->b0, fp->l0, fp->m0, fp->i0);
-	verbose_printk(KERN_NOTICE " B1 : %08lx    L1 : %08lx    M1 : %08lx    I1 : %08lx\n",
-		fp->b1, fp->l1, fp->m1, fp->i1);
-	verbose_printk(KERN_NOTICE " B2 : %08lx    L2 : %08lx    M2 : %08lx    I2 : %08lx\n",
-		fp->b2, fp->l2, fp->m2, fp->i2);
-	verbose_printk(KERN_NOTICE " B3 : %08lx    L3 : %08lx    M3 : %08lx    I3 : %08lx\n",
-		fp->b3, fp->l3, fp->m3, fp->i3);
-	verbose_printk(KERN_NOTICE "A0.w: %08lx   A0.x: %08lx   A1.w: %08lx   A1.x: %08lx\n",
-		fp->a0w, fp->a0x, fp->a1w, fp->a1x);
-
-	verbose_printk(KERN_NOTICE "USP : %08lx  ASTAT: %08lx\n",
-		rdusp(), fp->astat);
-
-	verbose_printk(KERN_NOTICE "\n");
-#endif
-}
-
-#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
-asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
 #endif
+	panic("Double Fault - unrecoverable event");
 
-static DEFINE_SPINLOCK(bfin_spinlock_lock);
-
-asmlinkage int sys_bfin_spinlock(int *p)
-{
-	int ret, tmp = 0;
-
-	spin_lock(&bfin_spinlock_lock);	/* This would also hold kernel preemption. */
-	ret = get_user(tmp, p);
-	if (likely(ret == 0)) {
-		if (unlikely(tmp))
-			ret = 1;
-		else
-			put_user(1, p);
-	}
-	spin_unlock(&bfin_spinlock_lock);
-	return ret;
 }
 
-int bfin_request_exception(unsigned int exception, void (*handler)(void))
-{
-	void (*curr_handler)(void);
-
-	if (exception > 0x3F)
-		return -EINVAL;
-
-	curr_handler = ex_table[exception];
-
-	if (curr_handler != ex_replaceable)
-		return -EBUSY;
-
-	ex_table[exception] = handler;
-
-	return 0;
-}
-EXPORT_SYMBOL(bfin_request_exception);
-
-int bfin_free_exception(unsigned int exception, void (*handler)(void))
-{
-	void (*curr_handler)(void);
-
-	if (exception > 0x3F)
-		return -EINVAL;
-
-	curr_handler = ex_table[exception];
-
-	if (curr_handler != handler)
-		return -EBUSY;
-
-	ex_table[exception] = ex_replaceable;
-
-	return 0;
-}
-EXPORT_SYMBOL(bfin_free_exception);
 
 void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
 {
@@ -1349,3 +542,15 @@ void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
 	dump_stack();
 	panic("Unrecoverable event");
 }
+
+#ifdef CONFIG_BUG
+int is_valid_bugaddr(unsigned long addr)
+{
+	unsigned short opcode;
+
+	if (!get_instruction(&opcode, (unsigned short *)addr))
+		return 0;
+
+	return opcode == BFIN_BUG_OPCODE;
+}
+#endif