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Commit 1ddba025 authored by Jesper Nilsson's avatar Jesper Nilsson
Browse files

CRIS: Minor generic kernel/traps.c changes. 

- Collect extern declarations at top of file.
- Change raw_printk to printk, use oops_in_progress instead.
- Fix formatting and whitespace.
- Allow the watchdog to be disabled during oops.
parent 3e1fdc4e

arch/cris/kernel/traps.c

+139 −87
Original line number Diff line number Diff line 
/* $Id: traps.c,v 1.11 2005/01/24 16:03:19 orjanf Exp $

 *

/*

 *  linux/arch/cris/traps.c

 *

 *  Here we handle the break vectors not used by the system call

 *  mechanism, as well as some general stack/register dumping

 *  things.

 *

 *  Copyright (C) 2000-2002 Axis Communications AB

 *  Copyright (C) 2000-2007 Axis Communications AB

 *

 *  Authors:   Bjorn Wesen

 *             Hans-Peter Nilsson
@@ -15,20 +14,33 @@ 


#include <linux/init.h>

#include <linux/module.h>



#include <asm/pgtable.h>

#include <asm/uaccess.h>



extern void arch_enable_nmi(void);

extern void stop_watchdog(void);

extern void reset_watchdog(void);

extern void show_registers(struct pt_regs *regs);



#ifdef CONFIG_DEBUG_BUGVERBOSE

extern void handle_BUG(struct pt_regs *regs);

#else

#define handle_BUG(regs)

#endif



static int kstack_depth_to_print = 24;



extern int raw_printk(const char *fmt, ...);

void (*nmi_handler)(struct pt_regs *);



void show_trace(unsigned long * stack)

void

show_trace(unsigned long *stack)

{

	unsigned long addr, module_start, module_end;

	extern char _stext, _etext;

	int i;



        raw_printk("\nCall Trace: ");

	printk("\nCall Trace: ");



	i = 1;

	module_start = VMALLOC_START;
@@ -39,7 +51,7 @@ void show_trace(unsigned long * stack) 
			/* This message matches "failing address" marked

			   s390 in ksymoops, so lines containing it will

			   not be filtered out by ksymoops.  */

			raw_printk ("Failing address 0x%lx\n", (unsigned long)stack);

			printk("Failing address 0x%lx\n", (unsigned long)stack);

			break;

		}

		stack++;
@@ -56,8 +68,8 @@ void show_trace(unsigned long * stack) 
		     (addr <= (unsigned long)&_etext)) ||

		    ((addr >= module_start) && (addr <= module_end))) {

			if (i && ((i % 8) == 0))

                                raw_printk("\n       ");

                        raw_printk("[<%08lx>] ", addr);

				printk("\n       ");

			printk("[<%08lx>] ", addr);

			i++;

		}

	}
@@ -98,50 +110,68 @@ show_stack(struct task_struct *task, unsigned long *sp) 


	stack = sp;



	raw_printk("\nStack from %08lx:\n       ", (unsigned long)stack);

	printk("\nStack from %08lx:\n       ", (unsigned long)stack);

	for (i = 0; i < kstack_depth_to_print; i++) {

		if (((long)stack & (THREAD_SIZE-1)) == 0)

			break;

		if (i && ((i % 8) == 0))

                        raw_printk("\n       ");

			printk("\n       ");

		if (__get_user(addr, stack)) {

			/* This message matches "failing address" marked

			   s390 in ksymoops, so lines containing it will

			   not be filtered out by ksymoops.  */

			raw_printk ("Failing address 0x%lx\n", (unsigned long)stack);

			printk("Failing address 0x%lx\n", (unsigned long)stack);

			break;

		}

		stack++;

		raw_printk("%08lx ", addr);

		printk("%08lx ", addr);

	}

	show_trace(sp);

}



static void (*nmi_handler)(struct pt_regs*);

extern void arch_enable_nmi(void);

#if 0

/* displays a short stack trace */



void set_nmi_handler(void (*handler)(struct pt_regs*))

int

show_stack(void)

{

  nmi_handler = handler;

  arch_enable_nmi();

	unsigned long *sp = (unsigned long *)rdusp();

	int i;



	printk("Stack dump [0x%08lx]:\n", (unsigned long)sp);

	for (i = 0; i < 16; i++)

		printk("sp + %d: 0x%08lx\n", i*4, sp[i]);

	return 0;

}

#endif



void

dump_stack(void)

{

	show_stack(NULL, NULL);

}

EXPORT_SYMBOL(dump_stack);



void handle_nmi(struct pt_regs* regs)

void

set_nmi_handler(void (*handler)(struct pt_regs *))

{

  if (nmi_handler)

    nmi_handler(regs);

	nmi_handler = handler;

	arch_enable_nmi();

}



#ifdef CONFIG_DEBUG_NMI_OOPS

void oops_nmi_handler(struct pt_regs* regs)

void

oops_nmi_handler(struct pt_regs *regs)

{

	stop_watchdog();

  raw_printk("NMI!\n");

	oops_in_progress = 1;

	printk("NMI!\n");

	show_registers(regs);

	oops_in_progress = 0;

}



static int

__init oops_nmi_register(void)

static int __init

oops_nmi_register(void)

{

	set_nmi_handler(oops_nmi_handler);

	return 0;
@@ -151,36 +181,58 @@ __initcall(oops_nmi_register); 


#endif



#if 0

/* displays a short stack trace */



int 

show_stack()

/*

 * This gets called from entry.S when the watchdog has bitten. Show something

 * similiar to an Oops dump, and if the kernel is configured to be a nice

 * doggy, then halt instead of reboot.

 */

void

watchdog_bite_hook(struct pt_regs *regs)

{

	unsigned long *sp = (unsigned long *)rdusp();

	int i;

	raw_printk("Stack dump [0x%08lx]:\n", (unsigned long)sp);

	for(i = 0; i < 16; i++)

		raw_printk("sp + %d: 0x%08lx\n", i*4, sp[i]);

	return 0;

}

#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY

	local_irq_disable();

	stop_watchdog();

	show_registers(regs);



	while (1)

		; /* Do nothing. */

#else

	show_registers(regs);

#endif

}



void dump_stack(void)

/* This is normally the Oops function. */

void

die_if_kernel(const char *str, struct pt_regs *regs, long err)

{

	show_stack(NULL, NULL);

}

	if (user_mode(regs))

		return;



EXPORT_SYMBOL(dump_stack);

#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY

	/*

	 * This printout might take too long and could trigger

	 * the watchdog normally. If NICE_DOGGY is set, simply

	 * stop the watchdog during the printout.

	 */

	stop_watchdog();

#endif



	handle_BUG(regs);



	printk("%s: %04lx\n", str, err & 0xffff);



	show_registers(regs);



	oops_in_progress = 0;



#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY

	reset_watchdog();

#endif

	do_exit(SIGSEGV);

}



void __init

trap_init(void)

{

	/* Nothing needs to be done */

}
 


void spinning_cpu(void* addr)

{

  raw_printk("CPU %d spinning on %X\n", smp_processor_id(), addr);

  dump_stack();

}