diff options
Diffstat (limited to 'arch/x86/mach-default')
| -rw-r--r-- | arch/x86/mach-default/Makefile | 5 | ||||
| -rw-r--r-- | arch/x86/mach-default/setup.c | 180 |
2 files changed, 185 insertions, 0 deletions
diff --git a/arch/x86/mach-default/Makefile b/arch/x86/mach-default/Makefile new file mode 100644 index 000000000000..012fe34459e6 --- /dev/null +++ b/arch/x86/mach-default/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the linux kernel. +# + +obj-y := setup.o diff --git a/arch/x86/mach-default/setup.c b/arch/x86/mach-default/setup.c new file mode 100644 index 000000000000..7f635c7a2381 --- /dev/null +++ b/arch/x86/mach-default/setup.c @@ -0,0 +1,180 @@ +/* + * 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> + +#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) +{ + init_ISA_irqs(); +} + +/* + * IRQ2 is cascade interrupt to second interrupt controller + */ +static struct irqaction irq2 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL}; + +/** + * 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) +{ +#ifdef CONFIG_X86_LOCAL_APIC + apic_intr_init(); +#endif + + if (!acpi_ioapic) + setup_irq(2, &irq2); +} + +/** + * 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 VISWS + * 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) +{ +} + +static struct irqaction irq0 = { + .handler = timer_interrupt, + .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL, + .mask = CPU_MASK_NONE, + .name = "timer" +}; + +/** + * 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) +{ + 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 Arcitecture) 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. + */ + + printk("NMI generated from unknown source!\n"); +} +#endif + +static __init int no_ipi_broadcast(char *str) +{ + get_option(&str, &no_broadcast); + printk ("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) +{ + printk ("Using IPI %s mode\n", no_broadcast ? "No-Shortcut" : + "Shortcut"); + return 0; +} + +late_initcall(print_ipi_mode); + +/** + * machine_specific_memory_setup - Hook for machine specific memory setup. + * + * Description: + * This is included late in kernel/setup.c so that it can make + * use of all of the static functions. + **/ + +char * __init machine_specific_memory_setup(void) +{ + char *who; + + + who = "BIOS-e820"; + + /* + * Try to copy the BIOS-supplied E820-map. + * + * Otherwise fake a memory map; one section from 0k->640k, + * the next section from 1mb->appropriate_mem_k + */ + sanitize_e820_map(E820_MAP, &E820_MAP_NR); + if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) { + unsigned long mem_size; + + /* compare results from other methods and take the greater */ + if (ALT_MEM_K < EXT_MEM_K) { + mem_size = EXT_MEM_K; + who = "BIOS-88"; + } else { + mem_size = ALT_MEM_K; + who = "BIOS-e801"; + } + + e820.nr_map = 0; + add_memory_region(0, LOWMEMSIZE(), E820_RAM); + add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM); + } + return who; +} |
