145 lines
3.2 KiB
C
145 lines
3.2 KiB
C
/*
|
|
* Machine specific setup for generic
|
|
*/
|
|
|
|
#include <linux/smp.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <asm/acpi.h>
|
|
#include <asm/arch_hooks.h>
|
|
#include <asm/e820.h>
|
|
#include <asm/setup.h>
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
#define DEFAULT_SEND_IPI (1)
|
|
#else
|
|
#define DEFAULT_SEND_IPI (0)
|
|
#endif
|
|
|
|
int no_broadcast=DEFAULT_SEND_IPI;
|
|
|
|
/**
|
|
* pre_intr_init_hook - initialisation prior to setting up interrupt vectors
|
|
*
|
|
* Description:
|
|
* Perform any necessary interrupt initialisation prior to setting up
|
|
* the "ordinary" interrupt call gates. For legacy reasons, the ISA
|
|
* interrupts should be initialised here if the machine emulates a PC
|
|
* in any way.
|
|
**/
|
|
void __init pre_intr_init_hook(void)
|
|
{
|
|
init_ISA_irqs();
|
|
}
|
|
|
|
/*
|
|
* IRQ2 is cascade interrupt to second interrupt controller
|
|
*/
|
|
static struct irqaction irq2 = {
|
|
.handler = no_action,
|
|
.mask = CPU_MASK_NONE,
|
|
.name = "cascade",
|
|
};
|
|
|
|
/**
|
|
* intr_init_hook - post gate setup interrupt initialisation
|
|
*
|
|
* Description:
|
|
* Fill in any interrupts that may have been left out by the general
|
|
* init_IRQ() routine. interrupts having to do with the machine rather
|
|
* than the devices on the I/O bus (like APIC interrupts in intel MP
|
|
* systems) are started here.
|
|
**/
|
|
void __init intr_init_hook(void)
|
|
{
|
|
#ifdef CONFIG_X86_LOCAL_APIC
|
|
apic_intr_init();
|
|
#endif
|
|
|
|
if (!acpi_ioapic)
|
|
setup_irq(2, &irq2);
|
|
}
|
|
|
|
/**
|
|
* pre_setup_arch_hook - hook called prior to any setup_arch() execution
|
|
*
|
|
* Description:
|
|
* generally used to activate any machine specific identification
|
|
* routines that may be needed before setup_arch() runs. On VISWS
|
|
* this is used to get the board revision and type.
|
|
**/
|
|
void __init pre_setup_arch_hook(void)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* trap_init_hook - initialise system specific traps
|
|
*
|
|
* Description:
|
|
* Called as the final act of trap_init(). Used in VISWS to initialise
|
|
* the various board specific APIC traps.
|
|
**/
|
|
void __init trap_init_hook(void)
|
|
{
|
|
}
|
|
|
|
static struct irqaction irq0 = {
|
|
.handler = timer_interrupt,
|
|
.flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
|
|
.mask = CPU_MASK_NONE,
|
|
.name = "timer"
|
|
};
|
|
|
|
/**
|
|
* time_init_hook - do any specific initialisations for the system timer.
|
|
*
|
|
* Description:
|
|
* Must plug the system timer interrupt source at HZ into the IRQ listed
|
|
* in irq_vectors.h:TIMER_IRQ
|
|
**/
|
|
void __init time_init_hook(void)
|
|
{
|
|
irq0.mask = cpumask_of_cpu(0);
|
|
setup_irq(0, &irq0);
|
|
}
|
|
|
|
#ifdef CONFIG_MCA
|
|
/**
|
|
* mca_nmi_hook - hook into MCA specific NMI chain
|
|
*
|
|
* Description:
|
|
* The MCA (Microchannel Architecture) has an NMI chain for NMI sources
|
|
* along the MCA bus. Use this to hook into that chain if you will need
|
|
* it.
|
|
**/
|
|
void mca_nmi_hook(void)
|
|
{
|
|
/* If I recall correctly, there's a whole bunch of other things that
|
|
* we can do to check for NMI problems, but that's all I know about
|
|
* at the moment.
|
|
*/
|
|
|
|
printk("NMI generated from unknown source!\n");
|
|
}
|
|
#endif
|
|
|
|
static __init int no_ipi_broadcast(char *str)
|
|
{
|
|
get_option(&str, &no_broadcast);
|
|
printk ("Using %s mode\n", no_broadcast ? "No IPI Broadcast" :
|
|
"IPI Broadcast");
|
|
return 1;
|
|
}
|
|
|
|
__setup("no_ipi_broadcast=", no_ipi_broadcast);
|
|
|
|
static int __init print_ipi_mode(void)
|
|
{
|
|
printk ("Using IPI %s mode\n", no_broadcast ? "No-Shortcut" :
|
|
"Shortcut");
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(print_ipi_mode);
|
|
|