2 * Machine specific setup for generic
6 #include <linux/init.h>
7 #include <linux/interrupt.h>
9 #include <asm/arch_hooks.h>
11 #include <asm/setup.h>
13 #ifdef CONFIG_HOTPLUG_CPU
14 #define DEFAULT_SEND_IPI (1)
16 #define DEFAULT_SEND_IPI (0)
19 int no_broadcast=DEFAULT_SEND_IPI;
22 * pre_intr_init_hook - initialisation prior to setting up interrupt vectors
25 * Perform any necessary interrupt initialisation prior to setting up
26 * the "ordinary" interrupt call gates. For legacy reasons, the ISA
27 * interrupts should be initialised here if the machine emulates a PC
30 void __init pre_intr_init_hook(void)
32 if (x86_quirks->arch_pre_intr_init) {
33 if (x86_quirks->arch_pre_intr_init())
40 * IRQ2 is cascade interrupt to second interrupt controller
42 static struct irqaction irq2 = {
44 .mask = CPU_MASK_NONE,
49 * intr_init_hook - post gate setup interrupt initialisation
52 * Fill in any interrupts that may have been left out by the general
53 * init_IRQ() routine. interrupts having to do with the machine rather
54 * than the devices on the I/O bus (like APIC interrupts in intel MP
55 * systems) are started here.
57 void __init intr_init_hook(void)
59 if (x86_quirks->arch_intr_init) {
60 if (x86_quirks->arch_intr_init())
63 #ifdef CONFIG_X86_LOCAL_APIC
72 * pre_setup_arch_hook - hook called prior to any setup_arch() execution
75 * generally used to activate any machine specific identification
76 * routines that may be needed before setup_arch() runs. On Voyager
77 * this is used to get the board revision and type.
79 void __init pre_setup_arch_hook(void)
84 * trap_init_hook - initialise system specific traps
87 * Called as the final act of trap_init(). Used in VISWS to initialise
88 * the various board specific APIC traps.
90 void __init trap_init_hook(void)
92 if (x86_quirks->arch_trap_init) {
93 if (x86_quirks->arch_trap_init())
98 static struct irqaction irq0 = {
99 .handler = timer_interrupt,
100 .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
101 .mask = CPU_MASK_NONE,
106 * time_init_hook - do any specific initialisations for the system timer.
109 * Must plug the system timer interrupt source at HZ into the IRQ listed
110 * in irq_vectors.h:TIMER_IRQ
112 void __init time_init_hook(void)
114 if (x86_quirks->arch_time_init) {
116 * A nonzero return code does not mean failure, it means
117 * that the architecture quirk does not want any
118 * generic (timer) setup to be performed after this:
120 if (x86_quirks->arch_time_init())
124 irq0.mask = cpumask_of_cpu(0);
130 * mca_nmi_hook - hook into MCA specific NMI chain
133 * The MCA (Microchannel Architecture) has an NMI chain for NMI sources
134 * along the MCA bus. Use this to hook into that chain if you will need
137 void mca_nmi_hook(void)
139 /* If I recall correctly, there's a whole bunch of other things that
140 * we can do to check for NMI problems, but that's all I know about
144 printk("NMI generated from unknown source!\n");
148 static __init int no_ipi_broadcast(char *str)
150 get_option(&str, &no_broadcast);
151 printk ("Using %s mode\n", no_broadcast ? "No IPI Broadcast" :
156 __setup("no_ipi_broadcast=", no_ipi_broadcast);
158 static int __init print_ipi_mode(void)
160 printk ("Using IPI %s mode\n", no_broadcast ? "No-Shortcut" :
165 late_initcall(print_ipi_mode);