i386: prepare shared kernel/crash.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 137 deletions

diff --git a/arch/i386/kernel/crash.c b/arch/i386/kernel/crash.c
deleted file mode 100644
index 53589d1..0000000
--- a/arch/i386/kernel/crash.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());
-}