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1 jermar 1
/*
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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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/** @addtogroup genericmm
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 * @{
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 */
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/** @file
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 */
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#ifndef KERN_FRAME_H_
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#define KERN_FRAME_H_
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#include <arch/types.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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#include <arch/mm/frame.h>
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#define ONE_FRAME   0
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#define TWO_FRAMES  1
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#define FOUR_FRAMES 2
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#ifdef ARCH_STACK_FRAMES
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#define STACK_FRAMES ARCH_STACK_FRAMES
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#else
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#define STACK_FRAMES ONE_FRAME
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#endif
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/** Maximum number of zones in system. */
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#define ZONES_MAX           16
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/** If possible, merge with neighbouring zones. */
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#define ZONE_JOIN           0x1
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/** Convert the frame address to kernel va. */
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#define FRAME_KA        0x1
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/** Do not panic and do not sleep on failure. */
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#define FRAME_ATOMIC            0x2
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/** Do not start reclaiming when no free memory. */
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#define FRAME_NO_RECLAIM        0x4
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static inline uintptr_t PFN2ADDR(pfn_t frame)
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{
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    return (uintptr_t) (frame << FRAME_WIDTH);
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}
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static inline pfn_t ADDR2PFN(uintptr_t 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)     \
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    ((~(((unative_t) -1) << (order)) & (index)) == 0)
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#define IS_BUDDY_LEFT_BLOCK(zone, frame)    \
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    (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
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#define IS_BUDDY_RIGHT_BLOCK(zone, frame)   \
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    (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
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#define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame)    \
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    (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
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#define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame)   \
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    (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
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#define frame_alloc(order, flags)       \
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    frame_alloc_generic(order, flags, NULL)
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extern void frame_init(void);
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extern void *frame_alloc_generic(uint8_t order, int flags, unsigned int *pzone);
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extern void frame_free(uintptr_t frame);
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extern void frame_reference_add(pfn_t pfn);
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extern int zone_create(pfn_t start, count_t count, pfn_t confframe, int flags);
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void *frame_get_parent(pfn_t frame, unsigned int hint);
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void frame_set_parent(pfn_t frame, void *data, unsigned int hint);
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void frame_mark_unavailable(pfn_t start, count_t count);
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uintptr_t zone_conf_size(count_t count);
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void zone_merge(unsigned int z1, unsigned int z2);
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void zone_merge_all(void);
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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(unsigned int znum);
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#endif
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/** @}
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 */