microblaze_mmu_v2: Traps MMU update

Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/include/asm/exceptions.h

 /*
  * Preliminary support for HW exception handing for Microblaze
  *
- * Copyright (C) 2008 Michal Simek
- * Copyright (C) 2008 PetaLogix
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008-2009 PetaLogix
  * Copyright (C) 2005 John Williams <jwilliams@itee.uq.edu.au>
  *
  * This file is subject to the terms and conditions of the GNU General
@@ -64,21 +64,13 @@ asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,
 void die(const char *str, struct pt_regs *fp, long err);
 void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr);
 
-#if defined(CONFIG_XMON)
-extern void xmon(struct pt_regs *regs);
-extern int xmon_bpt(struct pt_regs *regs);
-extern int xmon_sstep(struct pt_regs *regs);
-extern int xmon_iabr_match(struct pt_regs *regs);
-extern int xmon_dabr_match(struct pt_regs *regs);
-extern void (*xmon_fault_handler)(struct pt_regs *regs);
+#ifdef CONFIG_MMU
+void __bug(const char *file, int line, void *data);
+int bad_trap(int trap_num, struct pt_regs *regs);
+int debug_trap(struct pt_regs *regs);
+#endif /* CONFIG_MMU */
 
-void (*debugger)(struct pt_regs *regs) = xmon;
-int (*debugger_bpt)(struct pt_regs *regs) = xmon_bpt;
-int (*debugger_sstep)(struct pt_regs *regs) = xmon_sstep;
-int (*debugger_iabr_match)(struct pt_regs *regs) = xmon_iabr_match;
-int (*debugger_dabr_match)(struct pt_regs *regs) = xmon_dabr_match;
-void (*debugger_fault_handler)(struct pt_regs *regs);
-#elif defined(CONFIG_KGDB)
+#if defined(CONFIG_KGDB)
 void (*debugger)(struct pt_regs *regs);
 int (*debugger_bpt)(struct pt_regs *regs);
 int (*debugger_sstep)(struct pt_regs *regs);

arch/microblaze/kernel/traps.c

@@ -97,3 +97,37 @@ void dump_stack(void)
 	show_stack(NULL, NULL);
 }
 EXPORT_SYMBOL(dump_stack);
+
+#ifdef CONFIG_MMU
+void __bug(const char *file, int line, void *data)
+{
+	if (data)
+		printk(KERN_CRIT "kernel BUG at %s:%d (data = %p)!\n",
+			file, line, data);
+	else
+		printk(KERN_CRIT "kernel BUG at %s:%d!\n", file, line);
+
+	machine_halt();
+}
+
+int bad_trap(int trap_num, struct pt_regs *regs)
+{
+	printk(KERN_CRIT
+		"unimplemented trap %d called at 0x%08lx, pid %d!\n",
+		trap_num, regs->pc, current->pid);
+	return -ENOSYS;
+}
+
+int debug_trap(struct pt_regs *regs)
+{
+	int i;
+	printk(KERN_CRIT "debug trap\n");
+	for (i = 0; i < 32; i++) {
+		/* printk("r%i:%08X\t",i,regs->gpr[i]); */
+		if ((i % 4) == 3)
+			printk(KERN_CRIT "\n");
+	}
+	printk(KERN_CRIT "pc:%08lX\tmsr:%08lX\n", regs->pc, regs->msr);
+	return -ENOSYS;
+}
+#endif