URL
https://opencores.org/ocsvn/or1k_soc_on_altera_embedded_dev_kit/or1k_soc_on_altera_embedded_dev_kit/trunk
Subversion Repositories or1k_soc_on_altera_embedded_dev_kit
[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [x86/] [mach-default/] [setup.c] - Rev 3
Compare with Previous | Blame | View Log
/* * 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 = { .handler = no_action, .mask = CPU_MASK_NONE, .name = "cascade", }; /** * 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 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. */ 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(boot_params.e820_map, &boot_params.e820_entries); if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries) < 0) { unsigned long mem_size; /* compare results from other methods and take the greater */ if (boot_params.alt_mem_k < boot_params.screen_info.ext_mem_k) { mem_size = boot_params.screen_info.ext_mem_k; who = "BIOS-88"; } else { mem_size = boot_params.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; }