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>
15 #ifdef CONFIG_HOTPLUG_CPU
16 #define DEFAULT_SEND_IPI (1)
18 #define DEFAULT_SEND_IPI (0)
21 int no_broadcast
= DEFAULT_SEND_IPI
;
24 * pre_intr_init_hook - initialisation prior to setting up interrupt vectors
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
32 void __init
pre_intr_init_hook(void)
34 if (x86_quirks
->arch_pre_intr_init
) {
35 if (x86_quirks
->arch_pre_intr_init())
42 * IRQ2 is cascade interrupt to second interrupt controller
44 static struct irqaction irq2
= {
46 .mask
= CPU_MASK_NONE
,
51 * intr_init_hook - post gate setup interrupt initialisation
54 * Fill in any interrupts that may have been left out by the general
55 * init_IRQ() routine. interrupts having to do with the machine rather
56 * than the devices on the I/O bus (like APIC interrupts in intel MP
57 * systems) are started here.
59 void __init
intr_init_hook(void)
61 if (x86_quirks
->arch_intr_init
) {
62 if (x86_quirks
->arch_intr_init())
71 * pre_setup_arch_hook - hook called prior to any setup_arch() execution
74 * generally used to activate any machine specific identification
75 * routines that may be needed before setup_arch() runs. On Voyager
76 * this is used to get the board revision and type.
78 void __init
pre_setup_arch_hook(void)
83 * trap_init_hook - initialise system specific traps
86 * Called as the final act of trap_init(). Used in VISWS to initialise
87 * the various board specific APIC traps.
89 void __init
trap_init_hook(void)
91 if (x86_quirks
->arch_trap_init
) {
92 if (x86_quirks
->arch_trap_init())
97 static struct irqaction irq0
= {
98 .handler
= timer_interrupt
,
99 .flags
= IRQF_DISABLED
| IRQF_NOBALANCING
| IRQF_IRQPOLL
| IRQF_TIMER
,
100 .mask
= CPU_MASK_NONE
,
105 * pre_time_init_hook - do any specific initialisations before.
108 void __init
pre_time_init_hook(void)
110 if (x86_quirks
->arch_pre_time_init
)
111 x86_quirks
->arch_pre_time_init();
115 * time_init_hook - do any specific initialisations for the system timer.
118 * Must plug the system timer interrupt source at HZ into the IRQ listed
119 * in irq_vectors.h:TIMER_IRQ
121 void __init
time_init_hook(void)
123 if (x86_quirks
->arch_time_init
) {
125 * A nonzero return code does not mean failure, it means
126 * that the architecture quirk does not want any
127 * generic (timer) setup to be performed after this:
129 if (x86_quirks
->arch_time_init())
133 irq0
.mask
= cpumask_of_cpu(0);
139 * mca_nmi_hook - hook into MCA specific NMI chain
142 * The MCA (Microchannel Architecture) has an NMI chain for NMI sources
143 * along the MCA bus. Use this to hook into that chain if you will need
146 void mca_nmi_hook(void)
149 * If I recall correctly, there's a whole bunch of other things that
150 * we can do to check for NMI problems, but that's all I know about
153 pr_warning("NMI generated from unknown source!\n");
157 static __init
int no_ipi_broadcast(char *str
)
159 get_option(&str
, &no_broadcast
);
160 pr_info("Using %s mode\n",
161 no_broadcast
? "No IPI Broadcast" : "IPI Broadcast");
164 __setup("no_ipi_broadcast=", no_ipi_broadcast
);
166 static int __init
print_ipi_mode(void)
168 pr_info("Using IPI %s mode\n",
169 no_broadcast
? "No-Shortcut" : "Shortcut");
173 late_initcall(print_ipi_mode
);