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 |
|
/** @} |
*/ |