source: mainline/generic/include/mm/frame.h@ 5c3243e

/*
 * 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>

#define ONE_FRAME       0

#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 e1, __address s2, __address e2)
{
        if (s1 >= s2 && s1 < e2)
                return 1;
        if (e1 >= s2 && e1 < e2)
                return 1;
        if ((s1 < s2) && (e1 >= e2))
                return 1;
        return 0;
}

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 pfn_t SIZE2PFN(__address size)
{
        if (!size)
                return 0;
        return (pfn_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);
__address frame_alloc_generic(__u8 order, int flags, int * status, int *pzone);
extern void frame_free(__address addr);

extern void zone_create(pfn_t start, pfn_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, pfn_t count);
__address zone_conf_size(pfn_t start, pfn_t count);

/*
 * Console functions
 */
extern void zone_print_list(void);
void zone_print_one(int znum);

#endif