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/*

 * Copyright (C) 2005 Jakub Jermar

 * Copyright (C) 2005 Sergey Bondari

 * 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.

 */

#ifndef __FRAME_H__

#define __FRAME_H__

#include <arch/types.h>

#include <typedefs.h>

#include <adt/list.h>

#include <synch/spinlock.h>

#include <mm/buddy.h>

#include <arch/mm/page.h>

#include <arch/mm/frame.h>

#define ONE_FRAME   0

#define TWO_FRAMES  1

#ifdef ARCH_STACK_FRAMES

#define STACK_FRAMES ARCH_STACK_FRAMES

#else

#define STACK_FRAMES ONE_FRAME

#endif

#define ZONES_MAX       16      /**< Maximum number of zones in system */

#define ZONE_JOIN       0x1 /**< If possible, merge with neighberhood zones */

#define FRAME_KA        0x1 /* skip frames conflicting with user address space */

#define FRAME_PANIC     0x2 /* panic on failure */

#define FRAME_ATOMIC            0x4 /* do not panic and do not sleep on failure */

#define FRAME_NO_RECLAIM        0x8     /* do not start reclaiming when no free memory */

#define FRAME_OK        0   /* frame_alloc return status */

#define FRAME_NO_MEMORY     1   /* frame_alloc return status */

#define FRAME_ERROR     2   /* frame_alloc return status */

/* Return true if the interlvals overlap */

static inline int overlaps(__address s1,__address sz1, __address s2, __address sz2)

{

    __address e1 = s1+sz1;

    __address e2 = s2+sz2;

    return s1 < e2 && s2 < e1;

}

static inline __address PFN2ADDR(pfn_t frame)

{

    return (__address)(frame << FRAME_WIDTH);

}

static inline pfn_t ADDR2PFN(__address addr)

{

    return (pfn_t)(addr >> FRAME_WIDTH);

}

static inline count_t SIZE2FRAMES(size_t size)

{

    if (!size)

        return 0;

    return (count_t)((size-1) >> FRAME_WIDTH)+1;

}

#define IS_BUDDY_ORDER_OK(index, order)     ((~(((__native) -1) << (order)) & (index)) == 0)

#define IS_BUDDY_LEFT_BLOCK(zone, frame)    (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)

#define IS_BUDDY_RIGHT_BLOCK(zone, frame)   (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)

#define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame)    (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)

#define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame)   (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)

#define frame_alloc(order, flags)               frame_alloc_generic(order, flags, NULL, NULL)

#define frame_alloc_rc(order, flags, status)            frame_alloc_generic(order, flags, status, NULL)

#define frame_alloc_rc_zone(order, flags, status, zone)     frame_alloc_generic(order, flags, status, zone)

extern void frame_init(void);

extern pfn_t frame_alloc_generic(__u8 order, int flags, int * status, int *pzone);

extern void frame_free(pfn_t pfn);

extern int zone_create(pfn_t start, count_t count, pfn_t confframe, int flags);

void * frame_get_parent(pfn_t frame, int hint);

void frame_set_parent(pfn_t frame, void *data, int hint);

void frame_mark_unavailable(pfn_t start, count_t count);

__address zone_conf_size(count_t count);

void zone_merge(int z1, int z2);

void zone_merge_all(void);

/*

 * Console functions

 */

extern void zone_print_list(void);

void zone_print_one(int znum);

#endif