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/*

 * Copyright (C) 2005 Ondrej Palkovsky

 * 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.

 */

#include <arch/drivers/arc.h>

#include <arch/mm/page.h>

#include <print.h>

#include <arch.h>

#include <arch/byteorder.h>

#include <arch/mm/frame.h>

#include <mm/frame.h>

#include <interrupt.h>

#include <align.h>

#include <console/console.h>

/* This is a good joke, SGI HAS different types than NT bioses... */

/* Here is the SGI type */

static char *basetypes[] = {

    "ExceptionBlock",

    "SystemParameterBlock",

    "FreeContiguous",

    "FreeMemory",

    "BadMemory",

    "LoadedProgram",

    "FirmwareTemporary",

    "FirmwarePermanent"

};

static char *ctypes[] = {

    "ARC_type",

    "CPU_type",

    "FPU_type",

    "PrimaryICache",

    "PrimaryDCache",

    "SecondaryICache",

    "SecondaryDCache",

    "SecondaryCache",

    "Memory",

    "EISAAdapter",

    "TCAdapter",

    "SCSIAdapter",

    "DTIAdapter",

    "MultiFunctionAdapter",

    "DiskController",

    "TapeController",

    "CDROMController",

    "WORMController",

    "SerialController",

    "NetworkController",

    "DisplayController",

    "ParallelController",

    "PointerController",

    "KeyboardController",

    "AudioController",

    "OtherController",

    "DiskPeripheral",

    "FloppyDiskPeripheral",

    "TapePeripheral",

    "ModemPeripheral",

    "MonitorPeripheral",

    "PrinterPeripheral",

    "PointerPeripheral",

    "KeyboardPeripheral",

    "TerminalPeripheral",

    "OtherPeripheral",

    "LinePeripheral",

    "NetworkPeripheral"

    "OtherPeripheral",

    "XTalkAdapter",

    "PCIAdapter",

    "GIOAdapter",

    "TPUAdapter",

    "Anonymous"

};

static arc_sbp *sbp = (arc_sbp *)PA2KA(0x1000);

static arc_func_vector_t *arc_entry;

static void arc_putchar(char ch);

/** Return true if ARC is available */

int arc_enabled(void)

{

    return sbp != NULL;

}

static void arc_print_component(arc_component *c)

{

    int i;

    printf("%s: ",ctypes[c->type]);

    for (i=0;i < c->identifier_len;i++)

        arc_putchar(c->identifier[i]);

    arc_putchar('\n');

}

void arc_print_devices(void)

{

    arc_component *c,*next;

    if (!arc_enabled())

        return;

    c = arc_entry->getchild(NULL);

    while (c) {

        arc_print_component(c);

        next = arc_entry->getchild(c);

        while (!next) {

            next = arc_entry->getpeer(c);

            if (!next)

                c = arc_entry->getparent(c);

            if (!c)

                return;

        }

        c = next;

    }

}

void arc_print_memory_map(void)

{

    arc_memdescriptor_t *desc;

    if (!arc_enabled())

        return;

    printf("Memory map:\n");

    desc = arc_entry->getmemorydescriptor(NULL);

    while (desc) {

        printf("%s: %d (size: %dKB)\n",basetypes[desc->type],

               desc->basepage * ARC_FRAME,

               desc->basecount*ARC_FRAME/1024);

        desc = arc_entry->getmemorydescriptor(desc);

    }

}

/** Print charactor to console */

static void arc_putchar(char ch)

{

    __u32 cnt;

    ipl_t ipl;

    /* TODO: Should be spinlock? */

    ipl = interrupts_disable();

    arc_entry->write(1, &ch, 1, &cnt);

    interrupts_restore(ipl);

}

/** Initialize ARC structure

 *

 * @return 0 - ARC OK, -1 - ARC does not exist

 */

int arc_init(void)

{

    if (sbp->signature != ARC_MAGIC) {

        sbp = NULL;

        return -1;

    }

    arc_entry = sbp->firmwarevector;

    arc_putchar('A');

    arc_putchar('R');

    arc_putchar('C');

    arc_putchar('\n');

    return 0;

}

static bool kbd_polling_enabled;

static chardev_t console;

/** Try to get character, return character or -1 if not available */

static void arc_keyboard_poll(void)

{

    char ch;

    __u32 count;

    long result;

    if (! kbd_polling_enabled)

        return;

    if (arc_entry->getreadstatus(0))

        return;

    result = arc_entry->read(0, &ch, 1, &count);

    if (result || count!=1) {

        return;

    }

    if (ch == '\r')

        ch = '\n';

    if (ch == 0x7f)

        ch = '\b';

    chardev_push_character(&console, ch);

}

static char arc_read(chardev_t *dev)

{

    char ch;

    __u32 count;

    long result;

    result = arc_entry->read(0, &ch, 1, &count);

    if (result || count!=1) {

        printf("Error reading from ARC keyboard.\n");

        cpu_halt();

    }

    if (ch == '\r')

        return '\n';

    if (ch == 0x7f)

        return '\b';

    return ch;

}

static void arc_write(chardev_t *dev, const char ch)

{

    arc_putchar(ch);

}

static void arc_enable(chardev_t *dev)

{

    kbd_polling_enabled = true;

}

static void arc_disable(chardev_t *dev)

{

    kbd_polling_enabled = false;

}

static chardev_operations_t arc_ops = {

    .resume = arc_enable,

    .suspend = arc_disable,

    .write = arc_write,

    .read = arc_read

};

iroutine old_timer;

/** Do polling on timer interrupt */

static void timer_replace(int n, void *stack)

{

    arc_keyboard_poll();

    old_timer(n, stack);

    arc_keyboard_poll();

}

void arc_console(void)

{

    kbd_polling_enabled = true;

    chardev_initialize("arc_console", &console, &arc_ops);

    old_timer = int_register(TIMER_IRQ, "arc_kb_poll", timer_replace);

    stdin = &console;

    stdout = &console;

}

/* Initialize frame zones from ARC firmware.

 * In the future we may use even the FirmwareTemporary regions,

 * currently we use the FreeMemory (what about the LoadedProgram?)

 */

void arc_frame_init(void)

{

    arc_memdescriptor_t *desc;

    int total = 0;

    __address base;

    size_t basesize;

    desc = arc_entry->getmemorydescriptor(NULL);

    while (desc) {

        if (desc->type == FreeMemory ||

            desc->type == FreeContiguous) {

            base = desc->basepage*ARC_FRAME;

            basesize = desc->basecount*ARC_FRAME;

            if (base % FRAME_SIZE ) {

                basesize -= FRAME_SIZE - (base % FRAME_SIZE);

                base = ALIGN_UP(base, FRAME_SIZE);

            }

            basesize = ALIGN_DOWN(basesize, FRAME_SIZE);

            total += basesize;

            zone_create_in_region(base, basesize);

        }

        desc = arc_entry->getmemorydescriptor(desc);

    }

    config.memory_size = total;

}