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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.

 */

/** @addtogroup genericmm

 * @{

 */

/** @file

 */

#ifndef KERN_FRAME_H_

#define KERN_FRAME_H_

#include <arch/types.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

#define FOUR_FRAMES 2

#ifdef ARCH_STACK_FRAMES

#define STACK_FRAMES ARCH_STACK_FRAMES

#else

#define STACK_FRAMES ONE_FRAME

#endif

/** Maximum number of zones in system. */

#define ZONES_MAX           16

/** If possible, merge with neighbouring zones. */

#define ZONE_JOIN           0x1

/** Convert the frame address to kernel va. */

#define FRAME_KA        0x1

/** Do not panic and do not sleep on failure. */

#define FRAME_ATOMIC            0x2

/** Do not start reclaiming when no free memory. */

#define FRAME_NO_RECLAIM        0x4

static inline uintptr_t PFN2ADDR(pfn_t frame)

{

    return (uintptr_t) (frame << FRAME_WIDTH);

}

static inline pfn_t ADDR2PFN(uintptr_t 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)     \

    ((~(((unative_t) -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)

extern void frame_init(void);

extern void *frame_alloc_generic(uint8_t order, int flags, unsigned int *pzone);

extern void frame_free(uintptr_t frame);

extern void frame_reference_add(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, unsigned int hint);

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

void frame_mark_unavailable(pfn_t start, count_t count);

uintptr_t zone_conf_size(count_t count);

void zone_merge(unsigned int z1, unsigned int z2);

void zone_merge_all(void);

/*

 * Console functions

 */

extern void zone_print_list(void);

void zone_print_one(unsigned int znum);

#endif

/** @}

 */