arch/x86/mach-default/setup.c

   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
  21 int 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  **/
  32 void __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  **/
  50 void __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  **/
  66 void __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  **/
  77 void __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
  85 static 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  **/
  96 void __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  **/
 109 void __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  **/
 134 void 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
 145 static __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
 155 static 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
 162 late_initcall(print_ipi_mode);
 163