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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>

/* 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');

}

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 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

};

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();

}

chardev_t * 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);

	return &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;

	unsigned int i,j;

	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;

}