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/*

 * 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 ia64

 * @{

 */

/** @file

 */

#include <arch.h>

#include <arch/ski/ski.h>

#include <arch/drivers/it.h>

#include <arch/interrupt.h>

#include <arch/barrier.h>

#include <arch/asm.h>

#include <arch/register.h>

#include <arch/types.h>

#include <arch/context.h>

#include <arch/stack.h>

#include <arch/mm/page.h>

#include <mm/as.h>

#include <config.h>

#include <userspace.h>

#include <console/console.h>

#include <proc/uarg.h>

#include <syscall/syscall.h>

#include <ddi/irq.h>

#include <ddi/device.h>

#include <arch/drivers/ega.h>

#include <arch/bootinfo.h>

#include <genarch/kbd/i8042.h>

#include <genarch/kbd/ns16550.h>

#include <smp/smp.h>

#include <smp/ipi.h>

#include <arch/atomic.h>

#include <panic.h>

#include <print.h>

#include <sysinfo/sysinfo.h>

/* NS16550 as a COM 1 */

#define NS16550_IRQ (4 + LEGACY_INTERRUPT_BASE)

#define NS16550_PORT    0x3f8

bootinfo_t *bootinfo;

static uint64_t iosapic_base = 0xfec00000;

void arch_pre_main(void)

{

    /* Setup usermode init tasks. */

    unsigned int i;

    init.cnt = bootinfo->taskmap.count;

    for (i = 0; i < init.cnt; i++) {

        init.tasks[i].addr =

            ((unsigned long) bootinfo->taskmap.tasks[i].addr) |

            VRN_MASK;

        init.tasks[i].size = bootinfo->taskmap.tasks[i].size;

    }

}

void arch_pre_mm_init(void)

{

    /*

     * Set Interruption Vector Address (i.e. location of interruption vector

     * table).

     */

    iva_write((uintptr_t) &ivt);

    srlz_d();

}

static void iosapic_init(void)

{

    uint64_t IOSAPIC = PA2KA((unative_t)(iosapic_base)) | FW_OFFSET;

    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 arch_post_mm_init(void)

{

    if (config.cpu_active == 1) {

        iosapic_init();

        irq_init(INR_COUNT, INR_COUNT);

#ifdef SKI

        ski_init_console();

#else   

        ega_init();

#endif  

    }

    it_init();

}

void arch_post_cpu_init(void)

{

}

void arch_pre_smp_init(void)

{

}

#ifdef I460GX

#define POLL_INTERVAL       50000       /* 50 ms */

/** Kernel thread for polling keyboard. */

static void i8042_kkbdpoll(void *arg)

{

    while (1) {

#ifdef CONFIG_NS16550

    #ifndef CONFIG_NS16550_INTERRUPT_DRIVEN

        ns16550_poll();

    #endif  

#else

    #ifndef CONFIG_I8042_INTERRUPT_DRIVEN

        i8042_poll();

    #endif  

#endif

        thread_usleep(POLL_INTERVAL);

    }

}

#endif

void arch_post_smp_init(void)

{

    thread_t *t;

    /*

     * Create thread that polls keyboard.

     */

#ifdef SKI

    t = thread_create(kkbdpoll, NULL, TASK, 0, "kkbdpoll", true);

    if (!t)

        panic("cannot create kkbdpoll\n");

    thread_ready(t);

#endif      

#ifdef I460GX

    devno_t kbd = device_assign_devno();

#ifdef CONFIG_NS16550

    ns16550_init(kbd, NS16550_PORT, NS16550_IRQ, NULL, NULL);

#else

    devno_t mouse = device_assign_devno();

    i8042_init(kbd, IRQ_KBD, mouse, IRQ_MOUSE);

#endif

    t = thread_create(i8042_kkbdpoll, NULL, TASK, 0, "kkbdpoll", true);

    if (!t)

        panic("cannot create kkbdpoll\n");

    thread_ready(t);

#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, IO_OFFSET);

}

/** Enter userspace and never return. */

void userspace(uspace_arg_t *kernel_uarg)

{

    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((uintptr_t) kernel_uarg->uspace_entry,

        ((uintptr_t) kernel_uarg->uspace_stack) + PAGE_SIZE -

        ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT),

        ((uintptr_t) kernel_uarg->uspace_stack) + PAGE_SIZE,

        (uintptr_t) kernel_uarg->uspace_uarg, psr.value, rsc.value);

    while (1)

        ;

}

/** Set thread-local-storage pointer.

 *

 * We use r13 (a.k.a. tp) for this purpose.

 */

unative_t sys_tls_set(unative_t addr)

{

        return 0;

}

/** Acquire console back for kernel

 *

 */

void arch_grab_console(void)

{

#ifdef SKI

    ski_kbd_grab();

#else

#ifdef CONFIG_NS16550

    ns16550_grab();

#else

    i8042_grab();

#endif  

#endif  

}

/** Return console to userspace

 *

 */

void arch_release_console(void)

{

#ifdef SKI

    ski_kbd_release();

#else   

#ifdef CONFIG_NS16550

    ns16550_release();

#else   

    i8042_release();

#endif  

#endif

}

void arch_reboot(void)

{

    outb(0x64, 0xfe);

    while (1)

        ;

}

/** @}

 */