source: mainline/kernel/arch/ia64/src/ia64.c

/*
 * Copyright (c) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup kernel_ia64
 * @{
 */
/** @file
 */

#include <arch.h>
#include <arch/arch.h>
#include <typedefs.h>
#include <errno.h>
#include <interrupt.h>
#include <arch/interrupt.h>
#include <macros.h>
#include <stdbool.h>
#include <str.h>
#include <userspace.h>
#include <console/console.h>
#include <syscall/syscall.h>
#include <sysinfo/sysinfo.h>
#include <arch/drivers/it.h>
#include <arch/drivers/kbd.h>
#include <arch/legacyio.h>
#include <genarch/drivers/ega/ega.h>
#include <genarch/drivers/i8042/i8042.h>
#include <genarch/drivers/ns16550/ns16550.h>
#include <genarch/drivers/legacy/ia32/io.h>
#include <genarch/kbrd/kbrd.h>
#include <genarch/srln/srln.h>
#include <mm/page.h>
#include <mm/km.h>

#ifdef MACHINE_ski
#include <arch/drivers/ski.h>
#endif

static void ia64_pre_mm_init(void);
static void ia64_post_mm_init(void);
static void ia64_post_smp_init(void);

arch_ops_t ia64_ops = {
        .pre_mm_init = ia64_pre_mm_init,
        .post_mm_init = ia64_post_mm_init,
        .post_smp_init = ia64_post_smp_init,
};

arch_ops_t *arch_ops = &ia64_ops;

/* NS16550 as a COM 1 */
#define NS16550_IRQ  (4 + LEGACY_INTERRUPT_BASE)

bootinfo_t *bootinfo;

static uint64_t iosapic_base = 0xfec00000;
uintptr_t legacyio_virt_base = 0;

/** Performs ia64-specific initialization before main_bsp() is called. */
void ia64_pre_main(void)
{
        init.cnt = min3(bootinfo->taskmap.cnt, TASKMAP_MAX_RECORDS,
            CONFIG_INIT_TASKS);
        size_t i;

        for (i = 0; i < init.cnt; i++) {
                init.tasks[i].paddr =
                    (uintptr_t) bootinfo->taskmap.tasks[i].addr;
                init.tasks[i].size = bootinfo->taskmap.tasks[i].size;
                str_cpy(init.tasks[i].name, CONFIG_TASK_NAME_BUFLEN,
                    bootinfo->taskmap.tasks[i].name);
        }
}

void ia64_pre_mm_init(void)
{
        if (config.cpu_active == 1)
                exception_init();
}

static void iosapic_init(void)
{
        uintptr_t IOSAPIC = km_map(iosapic_base, PAGE_SIZE, PAGE_SIZE,
            PAGE_WRITE | PAGE_NOT_CACHEABLE);
        int i;

        int myid, myeid;

        myid = ia64_get_cpu_id();
        myeid = ia64_get_cpu_eid();

        for (i = 0; i < 16; i++) {
                if (i == 2)
                        continue;        /* Disable Cascade interrupt */
                ((uint32_t *)(IOSAPIC + 0x00))[0] = 0x10 + 2 * i;
                srlz_d();
                ((uint32_t *)(IOSAPIC + 0x10))[0] = LEGACY_INTERRUPT_BASE + i;
                srlz_d();
                ((uint32_t *)(IOSAPIC + 0x00))[0] = 0x10 + 2 * i + 1;
                srlz_d();
                ((uint32_t *)(IOSAPIC + 0x10))[0] = myid << (56 - 32) |
                    myeid << (48 - 32);
                srlz_d();
        }

}

void ia64_post_mm_init(void)
{
        if (config.cpu_active == 1) {
                /* Map the page with legacy I/O. */
                legacyio_virt_base = km_map(LEGACYIO_PHYS_BASE, LEGACYIO_SIZE,
                    KM_NATURAL_ALIGNMENT, PAGE_WRITE | PAGE_NOT_CACHEABLE);

                iosapic_init();
                irq_init(INR_COUNT, INR_COUNT);
        }
        it_init();
}

void ia64_post_smp_init(void)
{
        static const char *platform;

        /* Set platform name. */
#ifdef MACHINE_ski
        platform = "ski";
#endif
#ifdef MACHINE_i460GX
        platform = "pc";
#endif
        sysinfo_set_item_data("platform", NULL, (void *) platform,
            str_size(platform));

#ifdef MACHINE_ski
        ski_instance_t *ski_instance = skiin_init();
        if (ski_instance) {
                srln_instance_t *srln_instance = srln_init();
                if (srln_instance) {
                        indev_t *sink = stdin_wire();
                        indev_t *srln = srln_wire(srln_instance, sink);
                        skiin_wire(ski_instance, srln);
                }
        }

        outdev_t *skidev = skiout_init();
        if (skidev)
                stdout_wire(skidev);
#endif

#ifdef CONFIG_EGA
        outdev_t *egadev = ega_init(EGA_BASE, EGA_VIDEORAM);
        if (egadev)
                stdout_wire(egadev);
#endif

#ifdef CONFIG_NS16550
        ns16550_instance_t *ns16550_instance =
            ns16550_init(NS16550_BASE, 0, NS16550_IRQ, NULL, NULL,
            NULL);
        if (ns16550_instance) {
                srln_instance_t *srln_instance = srln_init();
                if (srln_instance) {
                        indev_t *sink = stdin_wire();
                        indev_t *srln = srln_wire(srln_instance, sink);
                        ns16550_wire(ns16550_instance, srln);
                }
        }

        sysinfo_set_item_val("kbd", NULL, true);
        sysinfo_set_item_val("kbd.inr", NULL, NS16550_IRQ);
        sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550);
        sysinfo_set_item_val("kbd.address.physical", NULL,
            (uintptr_t) NS16550_BASE);
#endif

#ifdef CONFIG_I8042
        i8042_instance_t *i8042_instance = i8042_init((i8042_t *) I8042_BASE,
            IRQ_KBD);
        if (i8042_instance) {
                kbrd_instance_t *kbrd_instance = kbrd_init();
                if (kbrd_instance) {
                        indev_t *sink = stdin_wire();
                        indev_t *kbrd = kbrd_wire(kbrd_instance, sink);
                        i8042_wire(i8042_instance, kbrd);
                }
        }
#endif

        sysinfo_set_item_val("ia64_iospace", NULL, true);
        sysinfo_set_item_val("ia64_iospace.address", NULL, true);
        sysinfo_set_item_val("ia64_iospace.address.virtual", NULL, LEGACYIO_USER_BASE);
}

uintptr_t arch_get_initial_sp(uintptr_t stack_base, uintptr_t stack_size)
{
        return ALIGN_DOWN(stack_base + stack_size / 2, STACK_ALIGNMENT);
}

/** Enter userspace and never return. */
void userspace(uintptr_t pc, uintptr_t sp)
{
        psr_t psr;
        rsc_t rsc;

        psr.value = psr_read();
        psr.cpl = PL_USER;
        psr.i = true;                   /* start with interrupts enabled */
        psr.ic = true;
        psr.ri = 0;                     /* start with instruction #0 */
        psr.bn = 1;                     /* start in bank 0 */

        asm volatile ("mov %0 = ar.rsc\n" : "=r" (rsc.value));
        rsc.loadrs = 0;
        rsc.be = false;
        rsc.pl = PL_USER;
        rsc.mode = 3;                   /* eager mode */

        /*
         * Switch to userspace.
         *
         * When calculating stack addresses, mind the stack split between the
         * memory stack and the RSE stack.
         * Memory stack occupies area under sp, while RSE stack occupies area above.
         */
        switch_to_userspace(pc,
            sp, sp + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT),
            0, psr.value, rsc.value);

        while (true)
                ;
}

void arch_reboot(void)
{
        pio_write_8((ioport8_t *)0x64, 0xfe);
        while (true)
                ;
}

/** Construct function pointer
 *
 * @param fptr   function pointer structure
 * @param addr   function address
 * @param caller calling function address
 *
 * @return address of the function pointer
 *
 */
void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)
{
        fptr->fnc = (sysarg_t) addr;
        fptr->gp = ((sysarg_t *) caller)[1];

        return (void *) fptr;
}

void irq_initialize_arch(irq_t *irq)
{
        (void) irq;
}

/** @}
 */