1/*
2 *	Machine specific setup for generic
3 */
4
5#include <linux/smp.h>
6#include <linux/init.h>
7#include <linux/interrupt.h>
8#include <asm/acpi.h>
9#include <asm/arch_hooks.h>
10#include <asm/e820.h>
11#include <asm/setup.h>
12
13#ifdef CONFIG_HOTPLUG_CPU
14#define DEFAULT_SEND_IPI	(1)
15#else
16#define DEFAULT_SEND_IPI	(0)
17#endif
18
19int no_broadcast=DEFAULT_SEND_IPI;
20
21/**
22 * pre_intr_init_hook - initialisation prior to setting up interrupt vectors
23 *
24 * Description:
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
28 *	in any way.
29 **/
30void __init pre_intr_init_hook(void)
31{
32	init_ISA_irqs();
33}
34
35/*
36 * IRQ2 is cascade interrupt to second interrupt controller
37 */
38static struct irqaction irq2 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL};
39
40/**
41 * intr_init_hook - post gate setup interrupt initialisation
42 *
43 * Description:
44 *	Fill in any interrupts that may have been left out by the general
45 *	init_IRQ() routine.  interrupts having to do with the machine rather
46 *	than the devices on the I/O bus (like APIC interrupts in intel MP
47 *	systems) are started here.
48 **/
49void __init intr_init_hook(void)
50{
51#ifdef CONFIG_X86_LOCAL_APIC
52	apic_intr_init();
53#endif
54
55	if (!acpi_ioapic)
56		setup_irq(2, &irq2);
57}
58
59/**
60 * pre_setup_arch_hook - hook called prior to any setup_arch() execution
61 *
62 * Description:
63 *	generally used to activate any machine specific identification
64 *	routines that may be needed before setup_arch() runs.  On VISWS
65 *	this is used to get the board revision and type.
66 **/
67void __init pre_setup_arch_hook(void)
68{
69}
70
71/**
72 * trap_init_hook - initialise system specific traps
73 *
74 * Description:
75 *	Called as the final act of trap_init().  Used in VISWS to initialise
76 *	the various board specific APIC traps.
77 **/
78void __init trap_init_hook(void)
79{
80}
81
82static struct irqaction irq0  = {
83	.handler = timer_interrupt,
84	.flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
85	.mask = CPU_MASK_NONE,
86	.name = "timer"
87};
88
89/**
90 * time_init_hook - do any specific initialisations for the system timer.
91 *
92 * Description:
93 *	Must plug the system timer interrupt source at HZ into the IRQ listed
94 *	in irq_vectors.h:TIMER_IRQ
95 **/
96void __init time_init_hook(void)
97{
98	irq0.mask = cpumask_of_cpu(0);
99	setup_irq(0, &irq0);
100}
101
102#ifdef CONFIG_MCA
103/**
104 * mca_nmi_hook - hook into MCA specific NMI chain
105 *
106 * Description:
107 *	The MCA (Microchannel Arcitecture) has an NMI chain for NMI sources
108 *	along the MCA bus.  Use this to hook into that chain if you will need
109 *	it.
110 **/
111void mca_nmi_hook(void)
112{
113	/* If I recall correctly, there's a whole bunch of other things that
114	 * we can do to check for NMI problems, but that's all I know about
115	 * at the moment.
116	 */
117
118	printk("NMI generated from unknown source!\n");
119}
120#endif
121
122static __init int no_ipi_broadcast(char *str)
123{
124	get_option(&str, &no_broadcast);
125	printk ("Using %s mode\n", no_broadcast ? "No IPI Broadcast" :
126											"IPI Broadcast");
127	return 1;
128}
129
130__setup("no_ipi_broadcast", no_ipi_broadcast);
131
132static int __init print_ipi_mode(void)
133{
134	printk ("Using IPI %s mode\n", no_broadcast ? "No-Shortcut" :
135											"Shortcut");
136	return 0;
137}
138
139late_initcall(print_ipi_mode);
140
141/**
142 * machine_specific_memory_setup - Hook for machine specific memory setup.
143 *
144 * Description:
145 *	This is included late in kernel/setup.c so that it can make
146 *	use of all of the static functions.
147 **/
148
149char * __init machine_specific_memory_setup(void)
150{
151	char *who;
152
153
154	who = "BIOS-e820";
155
156	/*
157	 * Try to copy the BIOS-supplied E820-map.
158	 *
159	 * Otherwise fake a memory map; one section from 0k->640k,
160	 * the next section from 1mb->appropriate_mem_k
161	 */
162	sanitize_e820_map(E820_MAP, &E820_MAP_NR);
163	if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
164		unsigned long mem_size;
165
166		/* compare results from other methods and take the greater */
167		if (ALT_MEM_K < EXT_MEM_K) {
168			mem_size = EXT_MEM_K;
169			who = "BIOS-88";
170		} else {
171			mem_size = ALT_MEM_K;
172			who = "BIOS-e801";
173		}
174
175		e820.nr_map = 0;
176		add_memory_region(0, LOWMEMSIZE(), E820_RAM);
177		add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
178  	}
179	return who;
180}
181