/arch/i386/mach-default/setup.c

  1/*
  2 *	Machine specific setup for generic
  3 */
  4
  5#include <linux/config.h>
  6#include <linux/smp.h>
  7#include <linux/init.h>
  8#include <linux/irq.h>
  9#include <linux/interrupt.h>
 10#include <asm/acpi.h>
 11#include <asm/arch_hooks.h>
 12
 13/**
 14 * pre_intr_init_hook - initialisation prior to setting up interrupt vectors
 15 *
 16 * Description:
 17 *	Perform any necessary interrupt initialisation prior to setting up
 18 *	the "ordinary" interrupt call gates.  For legacy reasons, the ISA
 19 *	interrupts should be initialised here if the machine emulates a PC
 20 *	in any way.
 21 **/
 22void __init pre_intr_init_hook(void)
 23{
 24	init_ISA_irqs();
 25}
 26
 27/*
 28 * IRQ2 is cascade interrupt to second interrupt controller
 29 */
 30static struct irqaction irq2 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL};
 31
 32/**
 33 * intr_init_hook - post gate setup interrupt initialisation
 34 *
 35 * Description:
 36 *	Fill in any interrupts that may have been left out by the general
 37 *	init_IRQ() routine.  interrupts having to do with the machine rather
 38 *	than the devices on the I/O bus (like APIC interrupts in intel MP
 39 *	systems) are started here.
 40 **/
 41void __init intr_init_hook(void)
 42{
 43#ifdef CONFIG_X86_LOCAL_APIC
 44	apic_intr_init();
 45#endif
 46
 47	if (!acpi_ioapic)
 48		setup_irq(2, &irq2);
 49}
 50
 51/**
 52 * pre_setup_arch_hook - hook called prior to any setup_arch() execution
 53 *
 54 * Description:
 55 *	generally used to activate any machine specific identification
 56 *	routines that may be needed before setup_arch() runs.  On VISWS
 57 *	this is used to get the board revision and type.
 58 **/
 59void __init pre_setup_arch_hook(void)
 60{
 61}
 62
 63/**
 64 * trap_init_hook - initialise system specific traps
 65 *
 66 * Description:
 67 *	Called as the final act of trap_init().  Used in VISWS to initialise
 68 *	the various board specific APIC traps.
 69 **/
 70void __init trap_init_hook(void)
 71{
 72}
 73
 74static struct irqaction irq0  = { timer_interrupt, SA_INTERRUPT, CPU_MASK_NONE, "timer", NULL, NULL};
 75
 76/**
 77 * time_init_hook - do any specific initialisations for the system timer.
 78 *
 79 * Description:
 80 *	Must plug the system timer interrupt source at HZ into the IRQ listed
 81 *	in irq_vectors.h:TIMER_IRQ
 82 **/
 83void __init time_init_hook(void)
 84{
 85	setup_irq(0, &irq0);
 86}
 87
 88#ifdef CONFIG_MCA
 89/**
 90 * mca_nmi_hook - hook into MCA specific NMI chain
 91 *
 92 * Description:
 93 *	The MCA (Microchannel Arcitecture) has an NMI chain for NMI sources
 94 *	along the MCA bus.  Use this to hook into that chain if you will need
 95 *	it.
 96 **/
 97void __init mca_nmi_hook(void)
 98{
 99	/* If I recall correctly, there's a whole bunch of other things that
100	 * we can do to check for NMI problems, but that's all I know about
101	 * at the moment.
102	 */
103
104	printk("NMI generated from unknown source!\n");
105}
106#endif