1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/*
* 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>
#include <mach_ipi.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)
{
if (x86_quirks->arch_pre_intr_init) {
if (x86_quirks->arch_pre_intr_init())
return;
}
init_ISA_irqs();
}
/**
* 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)
{
if (x86_quirks->arch_intr_init) {
if (x86_quirks->arch_intr_init())
return;
}
}
/**
* 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 Voyager
* 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)
{
if (x86_quirks->arch_trap_init) {
if (x86_quirks->arch_trap_init())
return;
}
}
static struct irqaction irq0 = {
.handler = timer_interrupt,
.flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
.mask = CPU_MASK_NONE,
.name = "timer"
};
/**
* pre_time_init_hook - do any specific initialisations before.
*
**/
void __init pre_time_init_hook(void)
{
if (x86_quirks->arch_pre_time_init)
x86_quirks->arch_pre_time_init();
}
/**
* 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)
{
if (x86_quirks->arch_time_init) {
/*
* A nonzero return code does not mean failure, it means
* that the architecture quirk does not want any
* generic (timer) setup to be performed after this:
*/
if (x86_quirks->arch_time_init())
return;
}
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.
*/
pr_warning("NMI generated from unknown source!\n");
}
#endif
static __init int no_ipi_broadcast(char *str)
{
get_option(&str, &no_broadcast);
pr_info("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)
{
pr_info("Using IPI %s mode\n",
no_broadcast ? "No-Shortcut" : "Shortcut");
return 0;
}
late_initcall(print_ipi_mode);
|
