root/arch/x86/mach-voyager/setup.c

DEFINITIONS

1. pre_intr_init_hook
2. intr_init_hook
3. pre_setup_arch_hook
4. trap_init_hook
5. time_init_hook
6. machine_specific_memory_setup

/*
 *      Machine specific setup for generic
 */

#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/arch_hooks.h>
#include <asm/voyager.h>
#include <asm/e820.h>
#include <asm/io.h>
#include <asm/setup.h>

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",
};

void __init intr_init_hook(void)
{
#ifdef CONFIG_SMP
        smp_intr_init();
#endif

        setup_irq(2, &irq2);
}

void __init pre_setup_arch_hook(void)
{
        /* Voyagers run their CPUs from independent clocks, so disable
         * the TSC code because we can't sync them */
        setup_clear_cpu_cap(X86_FEATURE_TSC);
}

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"
};

void __init time_init_hook(void)
{
        irq0.mask = cpumask_of_cpu(safe_smp_processor_id());
        setup_irq(0, &irq0);
}

/* Hook for machine specific memory setup. */

char *__init machine_specific_memory_setup(void)
{
        char *who;
        int new_nr;

        who = "NOT VOYAGER";

        if (voyager_level == 5) {
                __u32 addr, length;
                int i;

                who = "Voyager-SUS";

                e820.nr_map = 0;
                for (i = 0; voyager_memory_detect(i, &addr, &length); i++) {
                        e820_add_region(addr, length, E820_RAM);
                }
                return who;
        } else if (voyager_level == 4) {
                __u32 tom;
                __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT) << 8;
                /* select the DINO config space */
                outb(VOYAGER_DINO, VOYAGER_CAT_CONFIG_PORT);
                /* Read DINO top of memory register */
                tom = ((inb(catbase + 0x4) & 0xf0) << 16)
                    + ((inb(catbase + 0x5) & 0x7f) << 24);

                if (inb(catbase) != VOYAGER_DINO) {
                        printk(KERN_ERR
                               "Voyager: Failed to get DINO for L4, setting tom to EXT_MEM_K\n");
                        tom = (boot_params.screen_info.ext_mem_k) << 10;
                }
                who = "Voyager-TOM";
                e820_add_region(0, 0x9f000, E820_RAM);
                /* map from 1M to top of memory */
                e820_add_region(1 * 1024 * 1024, tom - 1 * 1024 * 1024,
                                  E820_RAM);
                /* FIXME: Should check the ASICs to see if I need to
                 * take out the 8M window.  Just do it at the moment
                 * */
                e820_add_region(8 * 1024 * 1024, 8 * 1024 * 1024,
                                  E820_RESERVED);
                return who;
        }

        return default_machine_specific_memory_setup();
}