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* Copyright (c) 2005 Jakub Jermar
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* Copyright (c) 2005 Sergey Bondari
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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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* - 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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* 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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/** @addtogroup genericmm
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#include <arch/types.h>
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#include <synch/spinlock.h>
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#include <arch/mm/page.h>
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#include <arch/mm/frame.h>
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#ifdef ARCH_STACK_FRAMES
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#define STACK_FRAMES ARCH_STACK_FRAMES
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#define STACK_FRAMES ONE_FRAME
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/** Maximum number of zones in the system. */
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typedef uint8_t frame_flags_t;
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/** Convert the frame address to kernel VA. */
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/** Do not panic and do not sleep on failure. */
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#define FRAME_ATOMIC 0x02
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/** Do not start reclaiming when no free memory. */
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#define FRAME_NO_RECLAIM 0x04
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typedef uint8_t zone_flags_t;
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/** Available zone (free for allocation) */
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#define ZONE_AVAILABLE 0x00
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/** Zone is reserved (not available for allocation) */
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#define ZONE_RESERVED 0x08
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/** Zone is used by firmware (not available for allocation) */
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#define ZONE_FIRMWARE 0x10
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/** Currently there is no equivalent zone flags
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#define FRAME_TO_ZONE_FLAGS(frame_flags) 0
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size_t refcount; /**< Tracking of shared frames */
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uint8_t buddy_order; /**< Buddy system block order */
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link_t buddy_link; /**< Link to the next free block inside
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void *parent; /**< If allocated by slab, this points there */
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pfn_t base; /**< Frame_no of the first frame
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in the frames array */
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size_t count; /**< Size of zone */
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size_t free_count; /**< Number of free frame_t
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size_t busy_count; /**< Number of busy frame_t
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zone_flags_t flags; /**< Type of the zone */
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frame_t *frames; /**< Array of frame_t structures
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buddy_system_t *buddy_system; /**< Buddy system for the zone */
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* The zoneinfo.lock must be locked when accessing zoneinfo structure.
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* Some of the attributes in zone_t structures are 'read-only'
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SPINLOCK_DECLARE(lock);
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zone_t info[ZONES_MAX];
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extern zones_t zones;
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static inline uintptr_t PFN2ADDR(pfn_t frame)
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return (uintptr_t) (frame << FRAME_WIDTH);
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static inline pfn_t ADDR2PFN(uintptr_t addr)
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return (pfn_t) (addr >> FRAME_WIDTH);
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static inline size_t SIZE2FRAMES(size_t size)
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return (size_t) ((size - 1) >> FRAME_WIDTH) + 1;
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static inline size_t FRAMES2SIZE(size_t frames)
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return (size_t) (frames << FRAME_WIDTH);
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static inline bool zone_flags_available(zone_flags_t flags)
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return ((flags & (ZONE_RESERVED | ZONE_FIRMWARE)) == 0);
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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) & 0x01) == 0)
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#define IS_BUDDY_RIGHT_BLOCK(zone, frame) \
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(((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 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) & 0x01) == 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) & 0x01) == 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, frame_flags_t, size_t *);
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extern void frame_free(uintptr_t);
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extern void frame_reference_add(pfn_t);
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extern size_t find_zone(pfn_t frame, size_t count, size_t hint);
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extern size_t zone_create(pfn_t, size_t, pfn_t, zone_flags_t);
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extern void *frame_get_parent(pfn_t, size_t);
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extern void frame_set_parent(pfn_t, void *, size_t);
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extern void frame_mark_unavailable(pfn_t, size_t);
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extern uintptr_t zone_conf_size(size_t);
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extern bool zone_merge(size_t, size_t);
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extern void zone_merge_all(void);
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extern uint64_t zone_total_size(void);
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extern void zone_print_list(void);
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extern void zone_print_one(size_t);