| 0,0 → 1,182 |
|---|
| /* |
| * 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 <mm/buddy.h> |
| #include <synch/spinlock.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 the system. */ |
| #define ZONES_MAX 32 |
| |
| typedef uint8_t frame_flags_t; |
| |
| /** Convert the frame address to kernel VA. */ |
| #define FRAME_KA 0x01 |
| /** Do not panic and do not sleep on failure. */ |
| #define FRAME_ATOMIC 0x02 |
| /** Do not start reclaiming when no free memory. */ |
| #define FRAME_NO_RECLAIM 0x04 |
| |
| typedef uint8_t zone_flags_t; |
| |
| /** Available zone (free for allocation) */ |
| #define ZONE_AVAILABLE 0x00 |
| /** Zone is reserved (not available for allocation) */ |
| #define ZONE_RESERVED 0x08 |
| /** Zone is used by firmware (not available for allocation) */ |
| #define ZONE_FIRMWARE 0x10 |
| |
| /** Currently there is no equivalent zone flags |
| for frame flags */ |
| #define FRAME_TO_ZONE_FLAGS(frame_flags) 0 |
| |
| typedef struct { |
| size_t refcount; /**< Tracking of shared frames */ |
| uint8_t buddy_order; /**< Buddy system block order */ |
| link_t buddy_link; /**< Link to the next free block inside |
| one order */ |
| void *parent; /**< If allocated by slab, this points there */ |
| } frame_t; |
| |
| typedef struct { |
| pfn_t base; /**< Frame_no of the first frame |
| in the frames array */ |
| size_t count; /**< Size of zone */ |
| size_t free_count; /**< Number of free frame_t |
| structures */ |
| size_t busy_count; /**< Number of busy frame_t |
| structures */ |
| zone_flags_t flags; /**< Type of the zone */ |
| |
| frame_t *frames; /**< Array of frame_t structures |
| in this zone */ |
| buddy_system_t *buddy_system; /**< Buddy system for the zone */ |
| } zone_t; |
| |
| /* |
| * The zoneinfo.lock must be locked when accessing zoneinfo structure. |
| * Some of the attributes in zone_t structures are 'read-only' |
| */ |
| typedef struct { |
| SPINLOCK_DECLARE(lock); |
| size_t count; |
| zone_t info[ZONES_MAX]; |
| } zones_t; |
| |
| extern zones_t zones; |
| |
| 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 size_t SIZE2FRAMES(size_t size) |
| { |
| if (!size) |
| return 0; |
| return (size_t) ((size - 1) >> FRAME_WIDTH) + 1; |
| } |
| |
| static inline size_t FRAMES2SIZE(size_t frames) |
| { |
| return (size_t) (frames << FRAME_WIDTH); |
| } |
| |
| static inline bool zone_flags_available(zone_flags_t flags) |
| { |
| return ((flags & (ZONE_RESERVED | ZONE_FIRMWARE)) == 0); |
| } |
| |
| #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) & 0x01) == 0) |
| #define IS_BUDDY_RIGHT_BLOCK(zone, frame) \ |
| (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 1) |
| #define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame) \ |
| (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 0) |
| #define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame) \ |
| (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x01) == 1) |
| |
| #define frame_alloc(order, flags) \ |
| frame_alloc_generic(order, flags, NULL) |
| |
| extern void frame_init(void); |
| extern void *frame_alloc_generic(uint8_t, frame_flags_t, size_t *); |
| extern void frame_free(uintptr_t); |
| extern void frame_reference_add(pfn_t); |
| |
| extern size_t find_zone(pfn_t frame, size_t count, size_t hint); |
| extern size_t zone_create(pfn_t, size_t, pfn_t, zone_flags_t); |
| extern void *frame_get_parent(pfn_t, size_t); |
| extern void frame_set_parent(pfn_t, void *, size_t); |
| extern void frame_mark_unavailable(pfn_t, size_t); |
| extern uintptr_t zone_conf_size(size_t); |
| extern bool zone_merge(size_t, size_t); |
| extern void zone_merge_all(void); |
| extern uint64_t zone_total_size(void); |
| |
| /* |
| * Console functions |
| */ |
| extern void zone_print_list(void); |
| extern void zone_print_one(size_t); |
| |
| #endif |
| |
| /** @} |
| */ |