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/*
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 * Copyright (C) 2005 Jakub Jermar
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 * Copyright (C) 2005 Sergey Bondari
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#ifndef __FRAME_H__
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#define __FRAME_H__
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#include <arch/types.h>
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#include <typedefs.h>
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#include <adt/list.h>
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#include <synch/spinlock.h>
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#include <mm/buddy.h>
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#include <arch/mm/page.h>
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#define ONE_FRAME   0
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#define ZONES_MAX       16      /**< Maximum number of zones in system */
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#define ZONE_JOIN       0x1 /**< If possible, merge with neighberhood zones */
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#define FRAME_KA        0x1 /* skip frames conflicting with user address space */
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#define FRAME_PANIC     0x2 /* panic on failure */
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#define FRAME_ATOMIC            0x4 /* do not panic and do not sleep on failure */
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#define FRAME_NO_RECLAIM        0x8     /* do not start reclaiming when no free memory */
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#define FRAME_OK        0   /* frame_alloc return status */
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#define FRAME_NO_MEMORY     1   /* frame_alloc return status */
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#define FRAME_ERROR     2   /* frame_alloc return status */
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/* Return true if the interlvals overlap */
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static inline int overlaps(__address s1,__address e1, __address s2, __address e2)
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{
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    if (s1 >= s2 && s1 < e2)
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        return 1;
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    if (e1 >= s2 && e1 < e2)
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        return 1;
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    if ((s1 < s2) && (e1 >= e2))
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        return 1;
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    return 0;
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}
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static inline __address PFN2ADDR(pfn_t frame)
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{
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    return (__address)(frame << FRAME_WIDTH);
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}
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static inline pfn_t ADDR2PFN(__address addr)
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{
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    return (pfn_t)(addr >> FRAME_WIDTH);
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}
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static inline count_t SIZE2FRAMES(size_t size)
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{
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    if (!size)
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        return 0;
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    return (count_t)((size-1) >> FRAME_WIDTH)+1;
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}
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#define IS_BUDDY_ORDER_OK(index, order)     ((~(((__native) -1) << (order)) & (index)) == 0)
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#define IS_BUDDY_LEFT_BLOCK(zone, frame)    (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
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#define IS_BUDDY_RIGHT_BLOCK(zone, frame)   (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
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#define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame)    (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
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#define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame)   (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
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#define frame_alloc(order, flags)               frame_alloc_generic(order, flags, NULL, NULL)
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#define frame_alloc_rc(order, flags, status)            frame_alloc_generic(order, flags, status, NULL)
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#define frame_alloc_rc_zone(order, flags, status, zone)     frame_alloc_generic(order, flags, status, zone)
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extern void frame_init(void);
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__address frame_alloc_generic(__u8 order, int flags, int * status, int *pzone);
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extern void frame_free(__address addr);
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extern void zone_create(pfn_t start, count_t count, pfn_t confframe, int flags);
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void * frame_get_parent(pfn_t frame, int hint);
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void frame_set_parent(pfn_t frame, void *data, int hint);
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void frame_mark_unavailable(pfn_t start, count_t count);
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__address zone_conf_size(pfn_t start, count_t count);
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/*
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 * Console functions
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 */
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extern void zone_print_list(void);
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void zone_print_one(int znum);
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#endif