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-rw-r--r--arch/mn10300/kernel/mn10300-watchdog.c205
1 files changed, 0 insertions, 205 deletions
diff --git a/arch/mn10300/kernel/mn10300-watchdog.c b/arch/mn10300/kernel/mn10300-watchdog.c
deleted file mode 100644
index 0d5641beadf5..000000000000
--- a/arch/mn10300/kernel/mn10300-watchdog.c
+++ /dev/null
@@ -1,205 +0,0 @@
-/* MN10300 Watchdog timer
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- * - Derived from arch/i386/kernel/nmi.c
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/kernel_stat.h>
-#include <linux/nmi.h>
-#include <asm/processor.h>
-#include <linux/atomic.h>
-#include <asm/intctl-regs.h>
-#include <asm/rtc-regs.h>
-#include <asm/div64.h>
-#include <asm/smp.h>
-#include <asm/gdb-stub.h>
-#include <proc/clock.h>
-
-static DEFINE_SPINLOCK(watchdog_print_lock);
-static unsigned int watchdog;
-static unsigned int watchdog_hz = 1;
-unsigned int watchdog_alert_counter[NR_CPUS];
-
-EXPORT_SYMBOL(arch_touch_nmi_watchdog);
-
-/*
- * the best way to detect whether a CPU has a 'hard lockup' problem
- * is to check its timer makes IRQ counts. If they are not
- * changing then that CPU has some problem.
- *
- * since NMIs dont listen to _any_ locks, we have to be extremely
- * careful not to rely on unsafe variables. The printk might lock
- * up though, so we have to break up any console locks first ...
- * [when there will be more tty-related locks, break them up
- * here too!]
- */
-static unsigned int last_irq_sums[NR_CPUS];
-
-int __init check_watchdog(void)
-{
- irq_cpustat_t tmp[1];
-
- printk(KERN_INFO "Testing Watchdog... ");
-
- memcpy(tmp, irq_stat, sizeof(tmp));
- local_irq_enable();
- mdelay((10 * 1000) / watchdog_hz); /* wait 10 ticks */
- local_irq_disable();
-
- if (nmi_count(0) - tmp[0].__nmi_count <= 5) {
- printk(KERN_WARNING "CPU#%d: Watchdog appears to be stuck!\n",
- 0);
- return -1;
- }
-
- printk(KERN_INFO "OK.\n");
-
- /* now that we know it works we can reduce NMI frequency to something
- * more reasonable; makes a difference in some configs
- */
- watchdog_hz = 1;
-
- return 0;
-}
-
-static int __init setup_watchdog(char *str)
-{
- unsigned tmp;
- int opt;
- u8 ctr;
-
- get_option(&str, &opt);
- if (opt != 1)
- return 0;
-
- watchdog = opt;
- if (watchdog) {
- set_intr_stub(EXCEP_WDT, watchdog_handler);
- ctr = WDCTR_WDCK_65536th;
- WDCTR = WDCTR_WDRST | ctr;
- WDCTR = ctr;
- tmp = WDCTR;
-
- tmp = __muldiv64u(1 << (16 + ctr * 2), 1000000, MN10300_WDCLK);
- tmp = 1000000000 / tmp;
- watchdog_hz = (tmp + 500) / 1000;
- }
-
- return 1;
-}
-
-__setup("watchdog=", setup_watchdog);
-
-void __init watchdog_go(void)
-{
- u8 wdt;
-
- if (watchdog) {
- printk(KERN_INFO "Watchdog: running at %uHz\n", watchdog_hz);
- wdt = WDCTR & ~WDCTR_WDCNE;
- WDCTR = wdt | WDCTR_WDRST;
- wdt = WDCTR;
- WDCTR = wdt | WDCTR_WDCNE;
- wdt = WDCTR;
-
- check_watchdog();
- }
-}
-
-#ifdef CONFIG_SMP
-static void watchdog_dump_register(void *dummy)
-{
- printk(KERN_ERR "--- Register Dump (CPU%d) ---\n", CPUID);
- show_registers(current_frame());
-}
-#endif
-
-asmlinkage
-void watchdog_interrupt(struct pt_regs *regs, enum exception_code excep)
-{
- /*
- * Since current-> is always on the stack, and we always switch
- * the stack NMI-atomically, it's safe to use smp_processor_id().
- */
- int sum, cpu;
- int irq = NMIIRQ;
- u8 wdt, tmp;
-
- wdt = WDCTR & ~WDCTR_WDCNE;
- WDCTR = wdt;
- tmp = WDCTR;
- NMICR = NMICR_WDIF;
-
- nmi_count(smp_processor_id())++;
- kstat_incr_irq_this_cpu(irq);
-
- for_each_online_cpu(cpu) {
-
- sum = irq_stat[cpu].__irq_count;
-
- if ((last_irq_sums[cpu] == sum)
-#if defined(CONFIG_GDBSTUB) && defined(CONFIG_SMP)
- && !(CHK_GDBSTUB_BUSY()
- || atomic_read(&cpu_doing_single_step))
-#endif
- ) {
- /*
- * Ayiee, looks like this CPU is stuck ...
- * wait a few IRQs (5 seconds) before doing the oops ...
- */
- watchdog_alert_counter[cpu]++;
- if (watchdog_alert_counter[cpu] == 5 * watchdog_hz) {
- spin_lock(&watchdog_print_lock);
- /*
- * We are in trouble anyway, lets at least try
- * to get a message out.
- */
- bust_spinlocks(1);
- printk(KERN_ERR
- "NMI Watchdog detected LOCKUP on CPU%d,"
- " pc %08lx, registers:\n",
- cpu, regs->pc);
-#ifdef CONFIG_SMP
- printk(KERN_ERR
- "--- Register Dump (CPU%d) ---\n",
- CPUID);
-#endif
- show_registers(regs);
-#ifdef CONFIG_SMP
- smp_nmi_call_function(watchdog_dump_register,
- NULL, 1);
-#endif
- printk(KERN_NOTICE "console shuts up ...\n");
- console_silent();
- spin_unlock(&watchdog_print_lock);
- bust_spinlocks(0);
-#ifdef CONFIG_GDBSTUB
- if (CHK_GDBSTUB_BUSY_AND_ACTIVE())
- gdbstub_exception(regs, excep);
- else
- gdbstub_intercept(regs, excep);
-#endif
- do_exit(SIGSEGV);
- }
- } else {
- last_irq_sums[cpu] = sum;
- watchdog_alert_counter[cpu] = 0;
- }
- }
-
- WDCTR = wdt | WDCTR_WDRST;
- tmp = WDCTR;
- WDCTR = wdt | WDCTR_WDCNE;
- tmp = WDCTR;
-}