Blackfin arch: cleanup arch/blackfin/kernel/traps.c handling code.

 - move the CONFIG_KGDB into one block, for easier reading
 - remove printk from printk_address, and pass around buffers. Also
   print out the labels when decoding CPLB errors, so you know exactly
   where the error was.
 - Do not use fixed addresses, becuase people do not know where they come from.
 - Turn the printing level down on the dump, so if you don't want,
   only the signal prints out - just like on other archs. If a kernel/interrupt
   crashes, it should dump everything all the time

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

1 files changed, 179 insertions, 139 deletions

diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index ce86659..cfa05436 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -37,10 +37,24 @@
 #include <asm/blackfin.h>
 #include <asm/irq_handler.h>
 #include <asm/trace.h>
+#include <asm/fixed_code.h>
 
 #ifdef CONFIG_KGDB
 # include <linux/debugger.h>
 # include <linux/kgdb.h>
+
+# 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
 
 /* Initiate the event table handler */
@@ -53,8 +67,7 @@ void __init trap_init(void)
 
 int kstack_depth_to_print = 48;
 
-#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
-static void printk_address(unsigned long address)
+static void decode_address(char *buf, unsigned long address)
 {
 	struct vm_list_struct *vml;
 	struct task_struct *p;
@@ -76,7 +89,7 @@ static void printk_address(unsigned long address)
 		/* yeah! kernel space! */
 		if (!modname)
 			modname = delim = "";
-		printk("<0x%p> { %s%s%s%s + 0x%lx }",
+		sprintf(buf, "<0x%p> { %s%s%s%s + 0x%lx }",
 		              (void *)address, delim, modname, delim, symname,
 		              (unsigned long)offset);
 		return;
@@ -84,6 +97,18 @@ static void printk_address(unsigned long address)
 	}
 #endif
 
+	/* Problem in fixed code section? */
+	if (address >= FIXED_CODE_START && address < FIXED_CODE_END) {
+		sprintf(buf, "<0x%p> /* Maybe fixed code section */", (void *)address);
+		return;
+	}
+
+	/* Problem somewhere before the kernel start address */
+	if (address < CONFIG_BOOT_LOAD) {
+		sprintf(buf, "<0x%p> /* Maybe null pointer? */", (void *)address);
+		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
@@ -119,7 +144,7 @@ static void printk_address(unsigned long address)
 				else
 					offset = (address - vma->vm_start) + (vma->vm_pgoff << PAGE_SHIFT);
 
-				printk("<0x%p> [ %s + 0x%lx ]",
+				sprintf(buf, "<0x%p> [ %s + 0x%lx ]",
 					(void *)address, name, offset);
 				if (!in_exception)
 					mmput(mm);
@@ -133,15 +158,16 @@ static void printk_address(unsigned long address)
 	}
 
 	/* we were unable to find this address anywhere */
-	printk("[<0x%p>]", (void *)address);
+	sprintf(buf, "[<0x%p>]", (void *)address);
 
 done:
 	write_unlock_irqrestore(&tasklist_lock, flags);
 }
-#endif
 
 asmlinkage void double_fault_c(struct pt_regs *fp)
 {
+	console_verbose();
+	oops_in_progress = 1;
 	printk(KERN_EMERG "\n" KERN_EMERG "Double Fault\n");
 	dump_bfin_regs(fp, (void *)fp->retx);
 	panic("Double Fault - unrecoverable event\n");
@@ -157,22 +183,29 @@ asmlinkage void trap_c(struct pt_regs *fp)
 	siginfo_t info;
 	unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
 
+	trace_buffer_save(j);
+
+	/* Important - be very careful dereferncing pointers - will lead to
+	 * double faults if the stack has become corrupt
+	 */
+
+	/* If the fault was caused by a kernel thread, or interrupt handler
+	 * we will kernel panic, so the system reboots.
+	 * If KGDB is enabled, don't set this for kernel breakpoints
+	*/
+	if ((bfin_read_IPEND() & 0xFFC0)
 #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)
+		&& trapnr != VEC_EXCPT02
 #endif
-
-	trace_buffer_save(j);
+	){
+		console_verbose();
+		oops_in_progress = 1;
+	} else if (current) {
+		if (current->mm == NULL) {
+			console_verbose();
+			oops_in_progress = 1;
+		}
+	}
 
 	/* trap_c() will be called for exceptions. During exceptions
 	 * processing, the pc value should be set with retx value.
@@ -217,7 +250,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
 	case VEC_EXCPT03:
 		info.si_code = SEGV_STACKFLOW;
 		sig = SIGSEGV;
-		printk(KERN_EMERG EXC_0x03);
+		printk(KERN_NOTICE EXC_0x03);
 		CHK_DEBUGGER_TRAP();
 		break;
 	/* 0x04 - User Defined, Caught by default */
@@ -246,7 +279,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
 	case VEC_OVFLOW:
 		info.si_code = TRAP_TRACEFLOW;
 		sig = SIGTRAP;
-		printk(KERN_EMERG EXC_0x11);
+		printk(KERN_NOTICE EXC_0x11);
 		CHK_DEBUGGER_TRAP();
 		break;
 	/* 0x12 - Reserved, Caught by default */
@@ -268,14 +301,14 @@ asmlinkage void trap_c(struct pt_regs *fp)
 	case VEC_UNDEF_I:
 		info.si_code = ILL_ILLOPC;
 		sig = SIGILL;
-		printk(KERN_EMERG EXC_0x21);
+		printk(KERN_NOTICE 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);
+		printk(KERN_NOTICE EXC_0x22);
 		CHK_DEBUGGER_TRAP();
 		break;
 	/* 0x23 - Data CPLB Protection Violation,
@@ -283,21 +316,21 @@ asmlinkage void trap_c(struct pt_regs *fp)
 	case VEC_CPLB_VL:
 		info.si_code = ILL_CPLB_VI;
 		sig = SIGILL;
-		printk(KERN_EMERG EXC_0x23);
+		printk(KERN_NOTICE 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);
+		printk(KERN_NOTICE 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);
+		printk(KERN_NOTICE EXC_0x25);
 		CHK_DEBUGGER_TRAP();
 		break;
 	/* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr,
@@ -305,7 +338,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
 	case VEC_CPLB_M:
 		info.si_code = BUS_ADRALN;
 		sig = SIGBUS;
-		printk(KERN_EMERG EXC_0x26);
+		printk(KERN_NOTICE EXC_0x26);
 		CHK_DEBUGGER_TRAP();
 		break;
 	/* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */
@@ -313,11 +346,10 @@ asmlinkage void trap_c(struct pt_regs *fp)
 		info.si_code = ILL_CPLB_MULHIT;
 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
 		sig = SIGSEGV;
-		printk(KERN_EMERG "\n"
-			KERN_EMERG "NULL pointer access (probably)\n");
+		printk(KERN_NOTICE "NULL pointer access (probably)\n");
 #else
 		sig = SIGILL;
-		printk(KERN_EMERG EXC_0x27);
+		printk(KERN_NOTICE EXC_0x27);
 #endif
 		CHK_DEBUGGER_TRAP();
 		break;
@@ -337,7 +369,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
 	case VEC_ISTRU_VL:      /* ADSP-BF535 only (MH) */
 		info.si_code = BUS_OPFETCH;
 		sig = SIGBUS;
-		printk(KERN_EMERG "BF535: VEC_ISTRU_VL\n");
+		printk(KERN_NOTICE "BF535: VEC_ISTRU_VL\n");
 		CHK_DEBUGGER_TRAP();
 		break;
 #else
@@ -347,7 +379,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
 	case VEC_MISALI_I:
 		info.si_code = BUS_ADRALN;
 		sig = SIGBUS;
-		printk(KERN_EMERG EXC_0x2A);
+		printk(KERN_NOTICE EXC_0x2A);
 		CHK_DEBUGGER_TRAP();
 		break;
 	/* 0x2B - Instruction CPLB protection Violation,
@@ -355,14 +387,14 @@ asmlinkage void trap_c(struct pt_regs *fp)
 	case VEC_CPLB_I_VL:
 		info.si_code = ILL_CPLB_VI;
 		sig = SIGILL;
-		printk(KERN_EMERG EXC_0x2B);
+		printk(KERN_NOTICE 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);
+		printk(KERN_NOTICE EXC_0x2C);
 		CHK_DEBUGGER_TRAP();
 		break;
 	/* 0x2D - Instruction CPLB Multiple Hits, handled here */
@@ -370,10 +402,10 @@ asmlinkage void trap_c(struct pt_regs *fp)
 		info.si_code = ILL_CPLB_MULHIT;
 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
 		sig = SIGSEGV;
-		printk(KERN_EMERG "\n\nJump to address 0 - 0x0fff\n");
+		printk(KERN_NOTICE "Jump to address 0 - 0x0fff\n");
 #else
 		sig = SIGILL;
-		printk(KERN_EMERG EXC_0x2D);
+		printk(KERN_NOTICE EXC_0x2D);
 #endif
 		CHK_DEBUGGER_TRAP();
 		break;
@@ -381,7 +413,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
 	case VEC_ILL_RES:
 		info.si_code = ILL_PRVOPC;
 		sig = SIGILL;
-		printk(KERN_EMERG EXC_0x2E);
+		printk(KERN_NOTICE EXC_0x2E);
 		CHK_DEBUGGER_TRAP();
 		break;
 	/* 0x2F - Reserved, Caught by default */
@@ -410,38 +442,40 @@ asmlinkage void trap_c(struct pt_regs *fp)
 		break;
 	}
 
-	if (sig != 0 && sig != SIGTRAP) {
+	BUG_ON(sig == 0);
+
+	if (sig != SIGTRAP) {
 		unsigned long stack;
 		dump_bfin_regs(fp, (void *)fp->retx);
-		dump_bfin_trace_buffer();
+
+		/* Print out the trace buffer if it makes sense */
+#ifndef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
+		if (trapnr == VEC_CPLB_I_M || trapnr == VEC_CPLB_M)
+			printk(KERN_NOTICE "No trace since you do not have "
+				"CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE enabled\n"
+				KERN_NOTICE "\n");
+		else
+#endif
+			dump_bfin_trace_buffer();
 		show_stack(current, &stack);
-		if (current->mm == NULL)
+		if (oops_in_progress) {
+#ifndef CONFIG_ACCESS_CHECK
+			printk(KERN_EMERG "Hey - dork - please turn on "
+				"CONFIG_ACCESS_CHECK\n");
+#endif
 			panic("Kernel exception");
+		}
+
+		/* Ensure that bad return addresses don't end up in an infinite
+		 * loop, due to speculative loads/reads
+		 */
+		fp->pc = SAFE_USER_INSTRUCTION;
 	}
 	info.si_signo = sig;
 	info.si_errno = 0;
 	info.si_addr = (void *)fp->pc;
 	force_sig_info(sig, &info, current);
 
-	/* 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;
 }
@@ -454,21 +488,21 @@ void dump_bfin_trace_buffer(void)
 {
 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
 	int tflags, i = 0;
+	char buf[150];
 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
 	int j, index;
 #endif
 
 	trace_buffer_save(tflags);
 
-	printk(KERN_EMERG "Hardware Trace:\n");
+	printk(KERN_NOTICE "Hardware Trace:\n");
 
 	if (likely(bfin_read_TBUFSTAT() & TBUFCNT)) {
 		for (; bfin_read_TBUFSTAT() & TBUFCNT; i++) {
-			printk(KERN_EMERG "%4i Target : ", i);
-			printk_address((unsigned long)bfin_read_TBUF());
-			printk("\n" KERN_EMERG "     Source : ");
-			printk_address((unsigned long)bfin_read_TBUF());
-			printk("\n");
+			decode_address(buf, (unsigned long)bfin_read_TBUF());
+			printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
+			decode_address(buf, (unsigned long)bfin_read_TBUF());
+			printk(KERN_NOTICE "     Source : %s\n", buf);
 		}
 	}
 
@@ -480,17 +514,16 @@ void dump_bfin_trace_buffer(void)
 
 	j = (1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN) * 128;
 	while (j) {
-		printk(KERN_EMERG "%4i Target : ", i);
-		printk_address(software_trace_buff[index]);
+		decode_address(buf, software_trace_buff[index]);
+		printk(KERN_NOTICE "%4i Target : %s\n", i, buf);
 		index -= 1;
 		if (index < 0 )
 			index = EXPAND_LEN;
-		printk("\n" KERN_EMERG "     Source : ");
-		printk_address(software_trace_buff[index]);
+		decode_address(buf, software_trace_buff[index]);
+		printk(KERN_NOTICE "     Source : %s\n", buf);
 		index -= 1;
 		if (index < 0)
 			index = EXPAND_LEN;
-		printk("\n");
 		j--;
 		i++;
 	}
@@ -505,10 +538,7 @@ static void show_trace(struct task_struct *tsk, unsigned long *sp)
 {
 	unsigned long addr;
 
-	printk("\nCall Trace:");
-#ifdef CONFIG_KALLSYMS
-	printk("\n");
-#endif
+	printk(KERN_NOTICE "\n" KERN_NOTICE "Call Trace:\n");
 
 	while (!kstack_end(sp)) {
 		addr = *sp++;
@@ -524,7 +554,7 @@ static void show_trace(struct task_struct *tsk, unsigned long *sp)
 			print_ip_sym(addr);
 	}
 
-	printk("\n");
+	printk(KERN_NOTICE "\n");
 }
 
 void show_stack(struct task_struct *task, unsigned long *stack)
@@ -546,14 +576,15 @@ void show_stack(struct task_struct *task, unsigned long *stack)
 	addr = (unsigned long)stack;
 	endstack = (unsigned long *)PAGE_ALIGN(addr);
 
-	printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack);
+	printk(KERN_NOTICE "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("\n" KERN_NOTICE "       ");
 		printk(" %08lx", *stack++);
 	}
+	printk("\n");
 
 	show_trace(task, stack);
 }
@@ -574,33 +605,34 @@ EXPORT_SYMBOL(dump_stack);
 
 void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
 {
-	if (current->pid) {
-		printk(KERN_EMERG "\n" KERN_EMERG "CURRENT PROCESS:\n"
-			KERN_EMERG "\n");
-		printk(KERN_EMERG "COMM=%s PID=%d\n",
-			current->comm, current->pid);
+	char buf [150];
+
+	if (!oops_in_progress) {
+		if (current->pid && current->mm) {
+			printk(KERN_NOTICE "\n" KERN_NOTICE "CURRENT PROCESS:\n");
+			printk(KERN_NOTICE "COMM=%s PID=%d\n",
+				current->comm, current->pid);
+
+			printk(KERN_NOTICE "TEXT = 0x%p-0x%p  DATA = 0x%p-0x%p\n"
+				KERN_NOTICE "BSS = 0x%p-0x%p   USER-STACK = 0x%p\n"
+				KERN_NOTICE "\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 {
+			printk (KERN_NOTICE "\n" KERN_NOTICE
+			     "No Valid pid - Either things are really messed up,"
+			     " or you are in the kernel\n");
+		}
 	} else {
-		printk
-		    (KERN_EMERG "\n" KERN_EMERG
-		     "No Valid pid - Either things are really messed up,"
-		     " or you are in the kernel\n");
-	}
-
-	if (current->mm) {
-		printk(KERN_EMERG "TEXT = 0x%p-0x%p  DATA = 0x%p-0x%p\n"
-		       KERN_EMERG "BSS = 0x%p-0x%p   USER-STACK = 0x%p\n"
-		       KERN_EMERG "\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(KERN_NOTICE "Kernel or interrupt exception\n");
 	}
 
-	printk(KERN_EMERG "return address: [0x%p]; contents of:", retaddr);
-	if (retaddr != 0 && retaddr <= (void *)physical_mem_end
+	if (retaddr >= (void *)FIXED_CODE_START  && retaddr < (void *)physical_mem_end
 #if L1_CODE_LENGTH != 0
 	    /* FIXME: Copy the code out of L1 Instruction SRAM through dma
 	       memcpy.  */
@@ -610,18 +642,20 @@ void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
 	) {
 		int i = ((unsigned int)retaddr & 0xFFFFFFF0) - 32;
 		unsigned short x = 0;
+		printk(KERN_NOTICE "return address: [0x%p]; contents of:", retaddr);
 		for (; i < ((unsigned int)retaddr & 0xFFFFFFF0) + 32; i += 2) {
 			if (!(i & 0xF))
-				printk("\n" KERN_EMERG "0x%08x: ", i);
+				printk("\n" KERN_NOTICE "0x%08x: ", i);
 
 			if (get_user(x, (unsigned short *)i))
 				break;
 #ifndef CONFIG_DEBUG_HWERR
 			/* If one of the last few instructions was a STI
 			 * it is likely that the error occured awhile ago
-			 * and we just noticed
+			 * and we just noticed. This only happens in kernel
+			 * context, which should mean an oops is happening
 			 */
-			if (x >= 0x0040 && x <= 0x0047 && i <= 0)
+			if (oops_in_progress && x >= 0x0040 && x <= 0x0047 && i <= 0)
 				panic("\n\nWARNING : You should reconfigure"
 					" the kernel to turn on\n"
 					" 'Hardware error interrupt"
@@ -634,56 +668,60 @@ void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
 			else
 				printk(" %04x ", x);
 		}
-		printk("\n" KERN_EMERG "\n");
+		printk("\n");
 	} else
-		printk(KERN_EMERG
+		printk("\n" KERN_NOTICE
 			"Cannot look at the [PC] for it is"
-			"in unreadable L1 SRAM - sorry\n");
+			" in unreadable memory - sorry\n");
+
+	printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\n");
+	printk(KERN_NOTICE " SEQSTAT: %08lx  IPEND: %04lx  SYSCFG: %04lx\n",
+		(long)fp->seqstat, fp->ipend, fp->syscfg);
 
+	decode_address(buf, fp->rete);
+	printk(KERN_NOTICE " RETE: %s\n", buf);
+	decode_address(buf, fp->retn);
+	printk(KERN_NOTICE " RETN: %s\n", buf);
+	decode_address(buf, fp->retx);
+	printk(KERN_NOTICE " RETX: %s\n", buf);
+	decode_address(buf, fp->rets);
+	printk(KERN_NOTICE " RETS: %s\n", buf);
 
-	printk(KERN_EMERG
-		"RETE:  %08lx  RETN: %08lx  RETX: %08lx  RETS: %08lx\n",
-		fp->rete, fp->retn, fp->retx, fp->rets);
-	printk(KERN_EMERG "IPEND: %04lx  SYSCFG: %04lx\n",
-		fp->ipend, fp->syscfg);
-	printk(KERN_EMERG "SEQSTAT: %08lx    SP: %08lx\n",
-		(long)fp->seqstat, (long)fp);
-	printk(KERN_EMERG "R0: %08lx    R1: %08lx    R2: %08lx    R3: %08lx\n",
+	if ((long)fp->seqstat & SEQSTAT_EXCAUSE) {
+		decode_address(buf, bfin_read_DCPLB_FAULT_ADDR());
+		printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf);
+		decode_address(buf, bfin_read_ICPLB_FAULT_ADDR());
+		printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf);
+	}
+
+	printk(KERN_NOTICE "\n" KERN_NOTICE "PROCESSOR STATE:\n");
+	printk(KERN_NOTICE " R0 : %08lx    R1 : %08lx    R2 : %08lx    R3 : %08lx\n",
 		fp->r0, fp->r1, fp->r2, fp->r3);
-	printk(KERN_EMERG "R4: %08lx    R5: %08lx    R6: %08lx    R7: %08lx\n",
+	printk(KERN_NOTICE " R4 : %08lx    R5 : %08lx    R6 : %08lx    R7 : %08lx\n",
 		fp->r4, fp->r5, fp->r6, fp->r7);
-	printk(KERN_EMERG "P0: %08lx    P1: %08lx    P2: %08lx    P3: %08lx\n",
+	printk(KERN_NOTICE " P0 : %08lx    P1 : %08lx    P2 : %08lx    P3 : %08lx\n",
 		fp->p0, fp->p1, fp->p2, fp->p3);
-	printk(KERN_EMERG
-		"P4: %08lx    P5: %08lx    FP: %08lx\n",
-		fp->p4, fp->p5, fp->fp);
-	printk(KERN_EMERG
-		"A0.w: %08lx    A0.x: %08lx    A1.w: %08lx    A1.x: %08lx\n",
-		fp->a0w, fp->a0x, fp->a1w, fp->a1x);
-
-	printk(KERN_EMERG "LB0: %08lx  LT0: %08lx  LC0: %08lx\n",
+	printk(KERN_NOTICE " P4 : %08lx    P5 : %08lx    FP : %08lx    SP : %08lx\n",
+		fp->p4, fp->p5, fp->fp, (long)fp);
+	printk(KERN_NOTICE " LB0: %08lx    LT0: %08lx    LC0: %08lx\n",
 		fp->lb0, fp->lt0, fp->lc0);
-	printk(KERN_EMERG "LB1: %08lx  LT1: %08lx  LC1: %08lx\n",
+	printk(KERN_NOTICE " LB1: %08lx    LT1: %08lx    LC1: %08lx\n",
 		fp->lb1, fp->lt1, fp->lc1);
-	printk(KERN_EMERG "B0: %08lx  L0: %08lx  M0: %08lx  I0: %08lx\n",
+	printk(KERN_NOTICE " B0 : %08lx    L0 : %08lx    M0 : %08lx    I0 : %08lx\n",
 		fp->b0, fp->l0, fp->m0, fp->i0);
-	printk(KERN_EMERG "B1: %08lx  L1: %08lx  M1: %08lx  I1: %08lx\n",
+	printk(KERN_NOTICE " B1 : %08lx    L1 : %08lx    M1 : %08lx    I1 : %08lx\n",
 		fp->b1, fp->l1, fp->m1, fp->i1);
-	printk(KERN_EMERG "B2: %08lx  L2: %08lx  M2: %08lx  I2: %08lx\n",
+	printk(KERN_NOTICE " B2 : %08lx    L2 : %08lx    M2 : %08lx    I2 : %08lx\n",
 		fp->b2, fp->l2, fp->m2, fp->i2);
-	printk(KERN_EMERG "B3: %08lx  L3: %08lx  M3: %08lx  I3: %08lx\n",
+	printk(KERN_NOTICE " B3 : %08lx    L3 : %08lx    M3 : %08lx    I3 : %08lx\n",
 		fp->b3, fp->l3, fp->m3, fp->i3);
+	printk(KERN_NOTICE "A0.w: %08lx   A0.x: %08lx   A1.w: %08lx   A1.x: %08lx\n",
+		fp->a0w, fp->a0x, fp->a1w, fp->a1x);
 
-	printk(KERN_EMERG "\n" KERN_EMERG "USP: %08lx   ASTAT: %08lx\n",
+	printk(KERN_NOTICE "USP : %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");
+	printk(KERN_NOTICE "\n");
 }
 
 #ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
@@ -758,6 +796,8 @@ void panic_cplb_error(int cplb_panic, struct pt_regs *fp)
 		break;
 	}
 
+	oops_in_progress = 1;
+
 	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);