linux/arch/x86/mach-default/setup.c
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   1/*
   2 *      Machine specific setup for generic
   3 */
   4
   5#include <linux/smp.h>
   6#include <linux/init.h>
   7#include <linux/interrupt.h>
   8#include <asm/acpi.h>
   9#include <asm/arch_hooks.h>
  10#include <asm/e820.h>
  11#include <asm/setup.h>
  12
  13#include <mach_ipi.h>
  14
  15#ifdef CONFIG_HOTPLUG_CPU
  16#define DEFAULT_SEND_IPI        (1)
  17#else
  18#define DEFAULT_SEND_IPI        (0)
  19#endif
  20
  21int no_broadcast = DEFAULT_SEND_IPI;
  22
  23/**
  24 * pre_intr_init_hook - initialisation prior to setting up interrupt vectors
  25 *
  26 * Description:
  27 *      Perform any necessary interrupt initialisation prior to setting up
  28 *      the "ordinary" interrupt call gates.  For legacy reasons, the ISA
  29 *      interrupts should be initialised here if the machine emulates a PC
  30 *      in any way.
  31 **/
  32void __init pre_intr_init_hook(void)
  33{
  34        if (x86_quirks->arch_pre_intr_init) {
  35                if (x86_quirks->arch_pre_intr_init())
  36                        return;
  37        }
  38        init_ISA_irqs();
  39}
  40
  41/**
  42 * intr_init_hook - post gate setup interrupt initialisation
  43 *
  44 * Description:
  45 *      Fill in any interrupts that may have been left out by the general
  46 *      init_IRQ() routine.  interrupts having to do with the machine rather
  47 *      than the devices on the I/O bus (like APIC interrupts in intel MP
  48 *      systems) are started here.
  49 **/
  50void __init intr_init_hook(void)
  51{
  52        if (x86_quirks->arch_intr_init) {
  53                if (x86_quirks->arch_intr_init())
  54                        return;
  55        }
  56}
  57
  58/**
  59 * pre_setup_arch_hook - hook called prior to any setup_arch() execution
  60 *
  61 * Description:
  62 *      generally used to activate any machine specific identification
  63 *      routines that may be needed before setup_arch() runs.  On Voyager
  64 *      this is used to get the board revision and type.
  65 **/
  66void __init pre_setup_arch_hook(void)
  67{
  68}
  69
  70/**
  71 * trap_init_hook - initialise system specific traps
  72 *
  73 * Description:
  74 *      Called as the final act of trap_init().  Used in VISWS to initialise
  75 *      the various board specific APIC traps.
  76 **/
  77void __init trap_init_hook(void)
  78{
  79        if (x86_quirks->arch_trap_init) {
  80                if (x86_quirks->arch_trap_init())
  81                        return;
  82        }
  83}
  84
  85static struct irqaction irq0  = {
  86        .handler = timer_interrupt,
  87        .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
  88        .mask = CPU_MASK_NONE,
  89        .name = "timer"
  90};
  91
  92/**
  93 * pre_time_init_hook - do any specific initialisations before.
  94 *
  95 **/
  96void __init pre_time_init_hook(void)
  97{
  98        if (x86_quirks->arch_pre_time_init)
  99                x86_quirks->arch_pre_time_init();
 100}
 101
 102/**
 103 * time_init_hook - do any specific initialisations for the system timer.
 104 *
 105 * Description:
 106 *      Must plug the system timer interrupt source at HZ into the IRQ listed
 107 *      in irq_vectors.h:TIMER_IRQ
 108 **/
 109void __init time_init_hook(void)
 110{
 111        if (x86_quirks->arch_time_init) {
 112                /*
 113                 * A nonzero return code does not mean failure, it means
 114                 * that the architecture quirk does not want any
 115                 * generic (timer) setup to be performed after this:
 116                 */
 117                if (x86_quirks->arch_time_init())
 118                        return;
 119        }
 120
 121        irq0.mask = cpumask_of_cpu(0);
 122        setup_irq(0, &irq0);
 123}
 124
 125#ifdef CONFIG_MCA
 126/**
 127 * mca_nmi_hook - hook into MCA specific NMI chain
 128 *
 129 * Description:
 130 *      The MCA (Microchannel Architecture) has an NMI chain for NMI sources
 131 *      along the MCA bus.  Use this to hook into that chain if you will need
 132 *      it.
 133 **/
 134void mca_nmi_hook(void)
 135{
 136        /* If I recall correctly, there's a whole bunch of other things that
 137         * we can do to check for NMI problems, but that's all I know about
 138         * at the moment.
 139         */
 140
 141        printk("NMI generated from unknown source!\n");
 142}
 143#endif
 144
 145static __init int no_ipi_broadcast(char *str)
 146{
 147        get_option(&str, &no_broadcast);
 148        printk ("Using %s mode\n", no_broadcast ? "No IPI Broadcast" :
 149                                                                                        "IPI Broadcast");
 150        return 1;
 151}
 152
 153__setup("no_ipi_broadcast=", no_ipi_broadcast);
 154
 155static int __init print_ipi_mode(void)
 156{
 157        printk ("Using IPI %s mode\n", no_broadcast ? "No-Shortcut" :
 158                                                                                        "Shortcut");
 159        return 0;
 160}
 161
 162late_initcall(print_ipi_mode);
 163
 164