2 * Machine specific setup for generic
5 #include <linux/config.h>
7 #include <linux/init.h>
8 #include <linux/interrupt.h>
10 #include <asm/arch_hooks.h>
12 #include <asm/setup.h>
14 #ifdef CONFIG_HOTPLUG_CPU
15 #define DEFAULT_SEND_IPI (1)
17 #define DEFAULT_SEND_IPI (0)
20 int no_broadcast=DEFAULT_SEND_IPI;
23 * pre_intr_init_hook - initialisation prior to setting up interrupt vectors
26 * Perform any necessary interrupt initialisation prior to setting up
27 * the "ordinary" interrupt call gates. For legacy reasons, the ISA
28 * interrupts should be initialised here if the machine emulates a PC
31 void __init pre_intr_init_hook(void)
37 * IRQ2 is cascade interrupt to second interrupt controller
39 static struct irqaction irq2 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL};
42 * intr_init_hook - post gate setup interrupt initialisation
45 * Fill in any interrupts that may have been left out by the general
46 * init_IRQ() routine. interrupts having to do with the machine rather
47 * than the devices on the I/O bus (like APIC interrupts in intel MP
48 * systems) are started here.
50 void __init intr_init_hook(void)
52 #ifdef CONFIG_X86_LOCAL_APIC
61 * pre_setup_arch_hook - hook called prior to any setup_arch() execution
64 * generally used to activate any machine specific identification
65 * routines that may be needed before setup_arch() runs. On VISWS
66 * this is used to get the board revision and type.
68 void __init pre_setup_arch_hook(void)
73 * trap_init_hook - initialise system specific traps
76 * Called as the final act of trap_init(). Used in VISWS to initialise
77 * the various board specific APIC traps.
79 void __init trap_init_hook(void)
83 static struct irqaction irq0 = { timer_interrupt, SA_INTERRUPT, CPU_MASK_NONE, "timer", NULL, NULL};
86 * time_init_hook - do any specific initialisations for the system timer.
89 * Must plug the system timer interrupt source at HZ into the IRQ listed
90 * in irq_vectors.h:TIMER_IRQ
92 void __init time_init_hook(void)
99 * mca_nmi_hook - hook into MCA specific NMI chain
102 * The MCA (Microchannel Arcitecture) has an NMI chain for NMI sources
103 * along the MCA bus. Use this to hook into that chain if you will need
106 void __init mca_nmi_hook(void)
108 /* If I recall correctly, there's a whole bunch of other things that
109 * we can do to check for NMI problems, but that's all I know about
113 printk("NMI generated from unknown source!\n");
117 static __init int no_ipi_broadcast(char *str)
119 get_option(&str, &no_broadcast);
120 printk ("Using %s mode\n", no_broadcast ? "No IPI Broadcast" :
125 __setup("no_ipi_broadcast", no_ipi_broadcast);
127 static int __init print_ipi_mode(void)
129 printk ("Using IPI %s mode\n", no_broadcast ? "No-Shortcut" :
134 late_initcall(print_ipi_mode);
137 * machine_specific_memory_setup - Hook for machine specific memory setup.
140 * This is included late in kernel/setup.c so that it can make
141 * use of all of the static functions.
144 char * __init machine_specific_memory_setup(void)
152 * Try to copy the BIOS-supplied E820-map.
154 * Otherwise fake a memory map; one section from 0k->640k,
155 * the next section from 1mb->appropriate_mem_k
157 sanitize_e820_map(E820_MAP, &E820_MAP_NR);
158 if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
159 unsigned long mem_size;
161 /* compare results from other methods and take the greater */
162 if (ALT_MEM_K < EXT_MEM_K) {
163 mem_size = EXT_MEM_K;
166 mem_size = ALT_MEM_K;
171 add_memory_region(0, LOWMEMSIZE(), E820_RAM);
172 add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);