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Diffstat (limited to 'arch/i386/kernel/crash_32.c')
-rw-r--r--arch/i386/kernel/crash_32.c137
1 files changed, 0 insertions, 137 deletions
diff --git a/arch/i386/kernel/crash_32.c b/arch/i386/kernel/crash_32.c
deleted file mode 100644
index 53589d1b1a05..000000000000
--- a/arch/i386/kernel/crash_32.c
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * Architecture specific (i386) functions for kexec based crash dumps.
- *
- * Created by: Hariprasad Nellitheertha (hari@in.ibm.com)
- *
- * Copyright (C) IBM Corporation, 2004. All rights reserved.
- *
- */
-
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/smp.h>
-#include <linux/reboot.h>
-#include <linux/kexec.h>
-#include <linux/delay.h>
-#include <linux/elf.h>
-#include <linux/elfcore.h>
-
-#include <asm/processor.h>
-#include <asm/hardirq.h>
-#include <asm/nmi.h>
-#include <asm/hw_irq.h>
-#include <asm/apic.h>
-#include <linux/kdebug.h>
-#include <asm/smp.h>
-
-#include <mach_ipi.h>
-
-
-/* This keeps a track of which one is crashing cpu. */
-static int crashing_cpu;
-
-#if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC)
-static atomic_t waiting_for_crash_ipi;
-
-static int crash_nmi_callback(struct notifier_block *self,
- unsigned long val, void *data)
-{
- struct pt_regs *regs;
- struct pt_regs fixed_regs;
- int cpu;
-
- if (val != DIE_NMI_IPI)
- return NOTIFY_OK;
-
- regs = ((struct die_args *)data)->regs;
- cpu = raw_smp_processor_id();
-
- /* Don't do anything if this handler is invoked on crashing cpu.
- * Otherwise, system will completely hang. Crashing cpu can get
- * an NMI if system was initially booted with nmi_watchdog parameter.
- */
- if (cpu == crashing_cpu)
- return NOTIFY_STOP;
- local_irq_disable();
-
- if (!user_mode_vm(regs)) {
- crash_fixup_ss_esp(&fixed_regs, regs);
- regs = &fixed_regs;
- }
- crash_save_cpu(regs, cpu);
- disable_local_APIC();
- atomic_dec(&waiting_for_crash_ipi);
- /* Assume hlt works */
- halt();
- for (;;)
- cpu_relax();
-
- return 1;
-}
-
-static void smp_send_nmi_allbutself(void)
-{
- cpumask_t mask = cpu_online_map;
- cpu_clear(safe_smp_processor_id(), mask);
- if (!cpus_empty(mask))
- send_IPI_mask(mask, NMI_VECTOR);
-}
-
-static struct notifier_block crash_nmi_nb = {
- .notifier_call = crash_nmi_callback,
-};
-
-static void nmi_shootdown_cpus(void)
-{
- unsigned long msecs;
-
- atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
- /* Would it be better to replace the trap vector here? */
- if (register_die_notifier(&crash_nmi_nb))
- return; /* return what? */
- /* Ensure the new callback function is set before sending
- * out the NMI
- */
- wmb();
-
- smp_send_nmi_allbutself();
-
- msecs = 1000; /* Wait at most a second for the other cpus to stop */
- while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) {
- mdelay(1);
- msecs--;
- }
-
- /* Leave the nmi callback set */
- disable_local_APIC();
-}
-#else
-static void nmi_shootdown_cpus(void)
-{
- /* There are no cpus to shootdown */
-}
-#endif
-
-void machine_crash_shutdown(struct pt_regs *regs)
-{
- /* This function is only called after the system
- * has panicked or is otherwise in a critical state.
- * The minimum amount of code to allow a kexec'd kernel
- * to run successfully needs to happen here.
- *
- * In practice this means shooting down the other cpus in
- * an SMP system.
- */
- /* The kernel is broken so disable interrupts */
- local_irq_disable();
-
- /* Make a note of crashing cpu. Will be used in NMI callback.*/
- crashing_cpu = safe_smp_processor_id();
- nmi_shootdown_cpus();
- lapic_shutdown();
-#if defined(CONFIG_X86_IO_APIC)
- disable_IO_APIC();
-#endif
- crash_save_cpu(regs, safe_smp_processor_id());
-}