WebSVN – HelenOS – Blame – /trunk/kernel/generic/src/mm/frame.c

Rev	Author	Line No.	Line
1	jermar	1	/*
2071	jermar	2	* Copyright (c) 2001-2005 Jakub Jermar
		3	* Copyright (c) 2005 Sergey Bondari
1	jermar	4	* All rights reserved.
		5	*
		6	* Redistribution and use in source and binary forms, with or without
		7	* modification, are permitted provided that the following conditions
		8	* are met:
		9	*
		10	* - Redistributions of source code must retain the above copyright
		11	* notice, this list of conditions and the following disclaimer.
		12	* - Redistributions in binary form must reproduce the above copyright
		13	* notice, this list of conditions and the following disclaimer in the
		14	* documentation and/or other materials provided with the distribution.
		15	* - The name of the author may not be used to endorse or promote products
		16	* derived from this software without specific prior written permission.
		17	*
		18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		28	*/
		29
1757	jermar	30	/** @addtogroup genericmm
1702	cejka	31	* @{
		32	*/
		33
1248	jermar	34	/**
1702	cejka	35	* @file
1248	jermar	36	* @brief Physical frame allocator.
		37	*
		38	* This file contains the physical frame allocator and memory zone management.
		39	* The frame allocator is built on top of the buddy allocator.
		40	*
		41	* @see buddy.c
		42	*/
		43
814	palkovsky	44	/*
		45	* Locking order
		46	*
		47	* In order to access particular zone, the process must first lock
		48	* the zones.lock, then lock the zone and then unlock the zones.lock.
		49	* This insures, that we can fiddle with the zones in runtime without
		50	* affecting the processes.
		51	*
		52	*/
		53
1	jermar	54	#include <arch/types.h>
		55	#include <mm/frame.h>
703	jermar	56	#include <mm/as.h>
1	jermar	57	#include <panic.h>
367	jermar	58	#include <debug.h>
788	jermar	59	#include <adt/list.h>
1	jermar	60	#include <synch/spinlock.h>
3187	jermar	61	#include <synch/mutex.h>
		62	#include <synch/condvar.h>
115	jermar	63	#include <arch/asm.h>
195	vana	64	#include <arch.h>
533	bondari	65	#include <print.h>
536	bondari	66	#include <align.h>
814	palkovsky	67	#include <mm/slab.h>
822	palkovsky	68	#include <bitops.h>
1063	palkovsky	69	#include <macros.h>
2128	jermar	70	#include <config.h>
115	jermar	71
814	palkovsky	72	typedef struct {
		73	count_t refcount; /*< tracking of shared frames /
1780	jermar	74	uint8_t buddy_order; /*< buddy system block order /
2133	jermar	75	link_t buddy_link; /**< link to the next free block inside one
		76	order */
814	palkovsky	77	void parent; /< If allocated by slab, this points there /
1236	jermar	78	} frame_t;
367	jermar	79
814	palkovsky	80	typedef struct {
		81	SPINLOCK_DECLARE(lock); /*< this lock protects everything below /
2133	jermar	82	pfn_t base; /**< frame_no of the first frame in the frames
		83	array */
820	jermar	84	count_t count; /*< Size of zone /
533	bondari	85
2133	jermar	86	frame_t frames; /*< array of frame_t structures in this
		87	zone */
814	palkovsky	88	count_t free_count; /*< number of free frame_t structures /
		89	count_t busy_count; /*< number of busy frame_t structures /
		90
2059	jermar	91	buddy_system_t buddy_system; /< buddy system for the zone /
814	palkovsky	92	int flags;
1236	jermar	93	} zone_t;
479	bondari	94
814	palkovsky	95	/*
		96	* The zoneinfo.lock must be locked when accessing zoneinfo structure.
		97	* Some of the attributes in zone_t structures are 'read-only'
368	jermar	98	*/
1	jermar	99
2121	decky	100	typedef struct {
814	palkovsky	101	SPINLOCK_DECLARE(lock);
2122	decky	102	unsigned int count;
814	palkovsky	103	zone_t *info[ZONES_MAX];
2121	decky	104	} zones_t;
1	jermar	105
2121	decky	106	static zones_t zones;
814	palkovsky	107
3187	jermar	108	/*
		109	* Synchronization primitives used to sleep when there is no memory
		110	* available.
		111	*/
3188	jermar	112	mutex_t mem_avail_mtx;
		113	condvar_t mem_avail_cv;
		114	unsigned long mem_avail_frames = 0; /*< Number of available frames. /
		115	unsigned long mem_avail_gen = 0; /*< Generation counter. /
2121	decky	116
2725	decky	117	/********************/
814	palkovsky	118	/* Helper functions */
2725	decky	119	/********************/
		120
814	palkovsky	121	static inline index_t frame_index(zone_t zone, frame_t frame)
762	palkovsky	122	{
2725	decky	123	return (index_t) (frame - zone->frames);
762	palkovsky	124	}
2725	decky	125
814	palkovsky	126	static inline index_t frame_index_abs(zone_t zone, frame_t frame)
1	jermar	127	{
2725	decky	128	return (index_t) (frame - zone->frames) + zone->base;
1	jermar	129	}
2725	decky	130
814	palkovsky	131	static inline int frame_index_valid(zone_t *zone, index_t index)
		132	{
2745	decky	133	return (index < zone->count);
814	palkovsky	134	}
1	jermar	135
814	palkovsky	136	/** Compute pfn_t from frame_t pointer & zone pointer */
820	jermar	137	static index_t make_frame_index(zone_t zone, frame_t frame)
762	palkovsky	138	{
2725	decky	139	return (frame - zone->frames);
762	palkovsky	140	}
		141
3185	jermar	142	/** Initialize frame structure.
762	palkovsky	143	*
3188	jermar	144	* @param frame Frame structure to be initialized.
762	palkovsky	145	*/
814	palkovsky	146	static void frame_initialize(frame_t *frame)
762	palkovsky	147	{
814	palkovsky	148	frame->refcount = 1;
		149	frame->buddy_order = 0;
762	palkovsky	150	}
		151
2725	decky	152	/**********************/
814	palkovsky	153	/* Zoneinfo functions */
2725	decky	154	/**********************/
762	palkovsky	155
3185	jermar	156	/** Insert-sort zone into zones list.
822	palkovsky	157	*
3185	jermar	158	* @param newzone New zone to be inserted into zone list.
		159	* @return Zone number on success, -1 on error.
1	jermar	160	*/
822	palkovsky	161	static int zones_add_zone(zone_t *newzone)
1	jermar	162	{
2122	decky	163	unsigned int i, j;
822	palkovsky	164	ipl_t ipl;
		165	zone_t *z;
762	palkovsky	166
822	palkovsky	167	ipl = interrupts_disable();
814	palkovsky	168	spinlock_lock(&zones.lock);
2725	decky	169
814	palkovsky	170	/* Try to merge */
2725	decky	171	if (zones.count + 1 == ZONES_MAX) {
		172	printf("Maximum zone count %u exceeded!\n", ZONES_MAX);
		173	spinlock_unlock(&zones.lock);
		174	interrupts_restore(ipl);
		175	return -1;
		176	}
		177
1037	decky	178	for (i = 0; i < zones.count; i++) {
822	palkovsky	179	/* Check for overflow */
852	palkovsky	180	z = zones.info[i];
3185	jermar	181	if (overlaps(newzone->base, newzone->count, z->base,
		182	z->count)) {
822	palkovsky	183	printf("Zones overlap!\n");
		184	return -1;
814	palkovsky	185	}
852	palkovsky	186	if (newzone->base < z->base)
822	palkovsky	187	break;
368	jermar	188	}
2725	decky	189
822	palkovsky	190	/* Move other zones up */
2133	jermar	191	for (j = i; j < zones.count; j++)
1037	decky	192	zones.info[j + 1] = zones.info[j];
2725	decky	193
822	palkovsky	194	zones.info[i] = newzone;
		195	zones.count++;
2725	decky	196
814	palkovsky	197	spinlock_unlock(&zones.lock);
822	palkovsky	198	interrupts_restore(ipl);
		199
		200	return i;
1	jermar	201	}
		202
814	palkovsky	203	/**
3185	jermar	204	* Try to find a zone where can we find the frame.
2725	decky	205	*
2059	jermar	206	* Assume interrupts are disabled.
2725	decky	207	*
3185	jermar	208	* @param frame Frame number contained in zone.
		209	* @param pzone If not null, it is used as zone hint. Zone index is
		210	* filled into the variable on success.
		211	* @return Pointer to locked zone containing frame.
368	jermar	212	*/
3185	jermar	213	static zone_t find_zone_and_lock(pfn_t frame, unsigned int pzone)
1	jermar	214	{
2122	decky	215	unsigned int i;
		216	unsigned int hint = pzone ? *pzone : 0;
814	palkovsky	217	zone_t *z;
533	bondari	218
814	palkovsky	219	spinlock_lock(&zones.lock);
		220
2745	decky	221	if (hint >= zones.count)
814	palkovsky	222	hint = 0;
533	bondari	223
814	palkovsky	224	i = hint;
		225	do {
		226	z = zones.info[i];
		227	spinlock_lock(&z->lock);
		228	if (z->base <= frame && z->base + z->count > frame) {
2133	jermar	229	/* Unlock the global lock */
		230	spinlock_unlock(&zones.lock);
814	palkovsky	231	if (pzone)
		232	*pzone = i;
		233	return z;
533	bondari	234	}
814	palkovsky	235	spinlock_unlock(&z->lock);
533	bondari	236
814	palkovsky	237	i++;
		238	if (i >= zones.count)
		239	i = 0;
		240	} while(i != hint);
		241
		242	spinlock_unlock(&zones.lock);
		243	return NULL;
533	bondari	244	}
		245
822	palkovsky	246	/** @return True if zone can allocate specified order */
1780	jermar	247	static int zone_can_alloc(zone_t *z, uint8_t order)
822	palkovsky	248	{
		249	return buddy_system_can_alloc(z->buddy_system, order);
		250	}
		251
2059	jermar	252	/** Find and lock zone that can allocate order frames.
367	jermar	253	*
2059	jermar	254	* Assume interrupts are disabled.
367	jermar	255	*
3185	jermar	256	* @param order Size (2^order) of free space we are trying to find.
		257	* @param pzone Pointer to preferred zone or NULL, on return contains
		258	* zone number.
367	jermar	259	*/
3185	jermar	260	static zone_t find_free_zone_and_lock(uint8_t order, unsigned int pzone)
367	jermar	261	{
2122	decky	262	unsigned int i;
367	jermar	263	zone_t *z;
2122	decky	264	unsigned int hint = pzone ? *pzone : 0;
367	jermar	265
814	palkovsky	266	spinlock_lock(&zones.lock);
		267	if (hint >= zones.count)
		268	hint = 0;
		269	i = hint;
		270	do {
		271	z = zones.info[i];
724	palkovsky	272
814	palkovsky	273	spinlock_lock(&z->lock);
367	jermar	274
814	palkovsky	275	/* Check if the zone has 2^order frames area available */
822	palkovsky	276	if (zone_can_alloc(z, order)) {
814	palkovsky	277	spinlock_unlock(&zones.lock);
		278	if (pzone)
		279	*pzone = i;
		280	return z;
367	jermar	281	}
814	palkovsky	282	spinlock_unlock(&z->lock);
		283	if (++i >= zones.count)
		284	i = 0;
		285	} while(i != hint);
		286	spinlock_unlock(&zones.lock);
		287	return NULL;
367	jermar	288	}
		289
2059	jermar	290	/**************************/
814	palkovsky	291	/* Buddy system functions */
2059	jermar	292	/**************************/
814	palkovsky	293
3185	jermar	294	/** Buddy system find_block implementation.
367	jermar	295	*
814	palkovsky	296	* Find block that is parent of current list.
		297	* That means go to lower addresses, until such block is found
367	jermar	298	*
3185	jermar	299	* @param order Order of parent must be different then this
		300	* parameter!!
367	jermar	301	*/
814	palkovsky	302	static link_t zone_buddy_find_block(buddy_system_t b, link_t *child,
2133	jermar	303	uint8_t order)
367	jermar	304	{
2133	jermar	305	frame_t *frame;
		306	zone_t *zone;
814	palkovsky	307	index_t index;
367	jermar	308
814	palkovsky	309	frame = list_get_instance(child, frame_t, buddy_link);
		310	zone = (zone_t *) b->data;
367	jermar	311
814	palkovsky	312	index = frame_index(zone, frame);
		313	do {
		314	if (zone->frames[index].buddy_order != order) {
		315	return &zone->frames[index].buddy_link;
		316	}
		317	} while(index-- > 0);
		318	return NULL;
367	jermar	319	}
479	bondari	320
3185	jermar	321	/** Buddy system find_buddy implementation.
489	jermar	322	*
3185	jermar	323	* @param b Buddy system.
		324	* @param block Block for which buddy should be found.
479	bondari	325	*
3185	jermar	326	* @return Buddy for given block if found.
479	bondari	327	*/
2133	jermar	328	static link_t zone_buddy_find_buddy(buddy_system_t b, link_t *block)
814	palkovsky	329	{
2133	jermar	330	frame_t *frame;
		331	zone_t *zone;
564	jermar	332	index_t index;
480	bondari	333	bool is_left, is_right;
479	bondari	334
480	bondari	335	frame = list_get_instance(block, frame_t, buddy_link);
533	bondari	336	zone = (zone_t *) b->data;
2133	jermar	337	ASSERT(IS_BUDDY_ORDER_OK(frame_index_abs(zone, frame),
		338	frame->buddy_order));
480	bondari	339
724	palkovsky	340	is_left = IS_BUDDY_LEFT_BLOCK_ABS(zone, frame);
		341	is_right = IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame);
814	palkovsky	342
564	jermar	343	ASSERT(is_left ^ is_right);
533	bondari	344	if (is_left) {
3185	jermar	345	index = (frame_index(zone, frame)) +
		346	(1 << frame->buddy_order);
1981	jermar	347	} else { /* if (is_right) */
3185	jermar	348	index = (frame_index(zone, frame)) -
		349	(1 << frame->buddy_order);
533	bondari	350	}
		351
814	palkovsky	352	if (frame_index_valid(zone, index)) {
		353	if (zone->frames[index].buddy_order == frame->buddy_order &&
		354	zone->frames[index].refcount == 0) {
533	bondari	355	return &zone->frames[index].buddy_link;
480	bondari	356	}
		357	}
814	palkovsky	358
539	jermar	359	return NULL;
479	bondari	360	}
		361
3185	jermar	362	/** Buddy system bisect implementation.
479	bondari	363	*
3185	jermar	364	* @param b Buddy system.
		365	* @param block Block to bisect.
480	bondari	366	*
3185	jermar	367	* @return Right block.
479	bondari	368	*/
3185	jermar	369	static link_t zone_buddy_bisect(buddy_system_t b, link_t *block)
		370	{
2133	jermar	371	frame_t frame_l, frame_r;
564	jermar	372
480	bondari	373	frame_l = list_get_instance(block, frame_t, buddy_link);
533	bondari	374	frame_r = (frame_l + (1 << (frame_l->buddy_order - 1)));
564	jermar	375
480	bondari	376	return &frame_r->buddy_link;
479	bondari	377	}
		378
3185	jermar	379	/** Buddy system coalesce implementation.
479	bondari	380	*
3185	jermar	381	* @param b Buddy system.
		382	* @param block_1 First block.
		383	* @param block_2 First block's buddy.
480	bondari	384	*
3185	jermar	385	* @return Coalesced block (actually block that represents lower
		386	* address).
479	bondari	387	*/
2133	jermar	388	static link_t zone_buddy_coalesce(buddy_system_t b, link_t *block_1,
		389	link_t *block_2)
822	palkovsky	390	{
814	palkovsky	391	frame_t frame1, frame2;
564	jermar	392
480	bondari	393	frame1 = list_get_instance(block_1, frame_t, buddy_link);
		394	frame2 = list_get_instance(block_2, frame_t, buddy_link);
564	jermar	395
533	bondari	396	return frame1 < frame2 ? block_1 : block_2;
479	bondari	397	}
		398
3185	jermar	399	/** Buddy system set_order implementation.
489	jermar	400	*
3185	jermar	401	* @param b Buddy system.
		402	* @param block Buddy system block.
		403	* @param order Order to set.
479	bondari	404	*/
2133	jermar	405	static void zone_buddy_set_order(buddy_system_t b, link_t block,
3185	jermar	406	uint8_t order)
		407	{
2133	jermar	408	frame_t *frame;
480	bondari	409	frame = list_get_instance(block, frame_t, buddy_link);
		410	frame->buddy_order = order;
479	bondari	411	}
		412
3185	jermar	413	/** Buddy system get_order implementation.
489	jermar	414	*
3185	jermar	415	* @param b Buddy system.
		416	* @param block Buddy system block.
479	bondari	417	*
3185	jermar	418	* @return Order of block.
479	bondari	419	*/
3185	jermar	420	static uint8_t zone_buddy_get_order(buddy_system_t b, link_t block)
		421	{
2133	jermar	422	frame_t *frame;
480	bondari	423	frame = list_get_instance(block, frame_t, buddy_link);
		424	return frame->buddy_order;
479	bondari	425	}
533	bondari	426
3185	jermar	427	/** Buddy system mark_busy implementation.
533	bondari	428	*
3185	jermar	429	* @param b Buddy system.
		430	* @param block Buddy system block.
533	bondari	431	*/
3185	jermar	432	static void zone_buddy_mark_busy(buddy_system_t b, link_t block)
		433	{
533	bondari	434	frame_t * frame;
822	palkovsky	435
533	bondari	436	frame = list_get_instance(block, frame_t, buddy_link);
		437	frame->refcount = 1;
		438	}
676	bondari	439
3185	jermar	440	/** Buddy system mark_available implementation.
814	palkovsky	441	*
3185	jermar	442	* @param b Buddy system.
		443	* @param block Buddy system block.
814	palkovsky	444	*/
3185	jermar	445	static void zone_buddy_mark_available(buddy_system_t b, link_t block)
		446	{
2133	jermar	447	frame_t *frame;
814	palkovsky	448	frame = list_get_instance(block, frame_t, buddy_link);
		449	frame->refcount = 0;
		450	}
		451
2083	decky	452	static buddy_system_operations_t zone_buddy_system_operations = {
814	palkovsky	453	.find_buddy = zone_buddy_find_buddy,
		454	.bisect = zone_buddy_bisect,
		455	.coalesce = zone_buddy_coalesce,
		456	.set_order = zone_buddy_set_order,
		457	.get_order = zone_buddy_get_order,
		458	.mark_busy = zone_buddy_mark_busy,
		459	.mark_available = zone_buddy_mark_available,
3206	jermar	460	.find_block = zone_buddy_find_block
814	palkovsky	461	};
		462
2059	jermar	463	/******************/
814	palkovsky	464	/* Zone functions */
2059	jermar	465	/******************/
814	palkovsky	466
3185	jermar	467	/** Allocate frame in particular zone.
814	palkovsky	468	*
3185	jermar	469	* Assume zone is locked.
1269	decky	470	* Panics if allocation is impossible.
814	palkovsky	471	*
3185	jermar	472	* @param zone Zone to allocate from.
		473	* @param order Allocate exactly 2^order frames.
1269	decky	474	*
3185	jermar	475	* @return Frame index in zone.
1269	decky	476	*
814	palkovsky	477	*/
1780	jermar	478	static pfn_t zone_frame_alloc(zone_t *zone, uint8_t order)
814	palkovsky	479	{
		480	pfn_t v;
		481	link_t *tmp;
		482	frame_t *frame;
		483
		484	/* Allocate frames from zone buddy system */
		485	tmp = buddy_system_alloc(zone->buddy_system, order);
		486
		487	ASSERT(tmp);
		488
		489	/* Update zone information. */
		490	zone->free_count -= (1 << order);
		491	zone->busy_count += (1 << order);
		492
		493	/* Frame will be actually a first frame of the block. */
		494	frame = list_get_instance(tmp, frame_t, buddy_link);
		495
		496	/* get frame address */
		497	v = make_frame_index(zone, frame);
		498	return v;
		499	}
		500
3185	jermar	501	/** Free frame from zone.
814	palkovsky	502	*
3185	jermar	503	* Assume zone is locked.
1568	palkovsky	504	*
3185	jermar	505	* @param zone Pointer to zone from which the frame is to be freed.
		506	* @param frame_idx Frame index relative to zone.
814	palkovsky	507	*/
820	jermar	508	static void zone_frame_free(zone_t *zone, index_t frame_idx)
814	palkovsky	509	{
		510	frame_t *frame;
1780	jermar	511	uint8_t order;
814	palkovsky	512
		513	frame = &zone->frames[frame_idx];
		514
		515	/* remember frame order */
		516	order = frame->buddy_order;
		517
		518	ASSERT(frame->refcount);
		519
		520	if (!--frame->refcount) {
		521	buddy_system_free(zone->buddy_system, &frame->buddy_link);
946	jermar	522
		523	/* Update zone information. */
		524	zone->free_count += (1 << order);
		525	zone->busy_count -= (1 << order);
814	palkovsky	526	}
		527	}
		528
3185	jermar	529	/** Return frame from zone. */
3188	jermar	530	static frame_t zone_get_frame(zone_t zone, index_t frame_idx)
814	palkovsky	531	{
		532	ASSERT(frame_idx < zone->count);
		533	return &zone->frames[frame_idx];
		534	}
		535
3185	jermar	536	/** Mark frame in zone unavailable to allocation. */
820	jermar	537	static void zone_mark_unavailable(zone_t *zone, index_t frame_idx)
814	palkovsky	538	{
		539	frame_t *frame;
		540	link_t *link;
		541
		542	frame = zone_get_frame(zone, frame_idx);
822	palkovsky	543	if (frame->refcount)
		544	return;
2133	jermar	545	link = buddy_system_alloc_block(zone->buddy_system,
		546	&frame->buddy_link);
814	palkovsky	547	ASSERT(link);
		548	zone->free_count--;
3188	jermar	549
		550	mutex_lock(&mem_avail_mtx);
		551	mem_avail_frames--;
		552	mutex_unlock(&mem_avail_mtx);
814	palkovsky	553	}
		554
3185	jermar	555	/** Join two zones.
822	palkovsky	556	*
3185	jermar	557	* Expect zone_t *z to point to space at least zone_conf_size large.
822	palkovsky	558	*
3185	jermar	559	* Assume z1 & z2 are locked.
1568	palkovsky	560	*
3185	jermar	561	* @param z Target zone structure pointer.
		562	* @param z1 Zone to merge.
		563	* @param z2 Zone to merge.
822	palkovsky	564	*/
		565	static void _zone_merge(zone_t z, zone_t z1, zone_t *z2)
		566	{
1780	jermar	567	uint8_t max_order;
2122	decky	568	unsigned int i;
		569	int z2idx;
822	palkovsky	570	pfn_t frame_idx;
		571	frame_t *frame;
		572
2133	jermar	573	ASSERT(!overlaps(z1->base, z1->count, z2->base, z2->count));
822	palkovsky	574	ASSERT(z1->base < z2->base);
		575
		576	spinlock_initialize(&z->lock, "zone_lock");
		577	z->base = z1->base;
2133	jermar	578	z->count = z2->base + z2->count - z1->base;
822	palkovsky	579	z->flags = z1->flags & z2->flags;
		580
		581	z->free_count = z1->free_count + z2->free_count;
		582	z->busy_count = z1->busy_count + z2->busy_count;
		583
		584	max_order = fnzb(z->count);
		585
2133	jermar	586	z->buddy_system = (buddy_system_t *) &z[1];
		587	buddy_system_create(z->buddy_system, max_order,
		588	&zone_buddy_system_operations, (void *) z);
822	palkovsky	589
2133	jermar	590	z->frames = (frame_t )((uint8_t ) z->buddy_system +
		591	buddy_conf_size(max_order));
822	palkovsky	592	for (i = 0; i < z->count; i++) {
		593	/* This marks all frames busy */
		594	frame_initialize(&z->frames[i]);
		595	}
		596	/* Copy frames from both zones to preserve full frame orders,
1093	palkovsky	597	* parents etc. Set all free frames with refcount=0 to 1, because
822	palkovsky	598	* we add all free frames to buddy allocator later again, clear
1093	palkovsky	599	* order to 0. Don't set busy frames with refcount=0, as they
		600	* will not be reallocated during merge and it would make later
		601	* problems with allocation/free.
822	palkovsky	602	*/
2122	decky	603	for (i = 0; i < z1->count; i++)
822	palkovsky	604	z->frames[i] = z1->frames[i];
2122	decky	605	for (i = 0; i < z2->count; i++) {
822	palkovsky	606	z2idx = i + (z2->base - z1->base);
		607	z->frames[z2idx] = z2->frames[i];
		608	}
1093	palkovsky	609	i = 0;
		610	while (i < z->count) {
		611	if (z->frames[i].refcount) {
		612	/* skip busy frames */
		613	i += 1 << z->frames[i].buddy_order;
		614	} else { /* Free frames, set refcount=1 */
		615	/* All free frames have refcount=0, we need not
		616	* to check the order */
822	palkovsky	617	z->frames[i].refcount = 1;
		618	z->frames[i].buddy_order = 0;
1093	palkovsky	619	i++;
822	palkovsky	620	}
		621	}
		622	/* Add free blocks from the 2 original zones */
		623	while (zone_can_alloc(z1, 0)) {
		624	frame_idx = zone_frame_alloc(z1, 0);
		625	frame = &z->frames[frame_idx];
		626	frame->refcount = 0;
		627	buddy_system_free(z->buddy_system, &frame->buddy_link);
		628	}
		629	while (zone_can_alloc(z2, 0)) {
		630	frame_idx = zone_frame_alloc(z2, 0);
2133	jermar	631	frame = &z->frames[frame_idx + (z2->base - z1->base)];
822	palkovsky	632	frame->refcount = 0;
		633	buddy_system_free(z->buddy_system, &frame->buddy_link);
		634	}
		635	}
		636
3185	jermar	637	/** Return old configuration frames into the zone.
822	palkovsky	638	*
		639	* We have several cases
		640	* - the conf. data is outside of zone -> exit, shall we call frame_free??
824	palkovsky	641	* - the conf. data was created by zone_create or
		642	* updated with reduce_region -> free every frame
		643	*
3185	jermar	644	* @param newzone The actual zone where freeing should occur.
		645	* @param oldzone Pointer to old zone configuration data that should
		646	* be freed from new zone.
822	palkovsky	647	*/
		648	static void return_config_frames(zone_t newzone, zone_t oldzone)
		649	{
		650	pfn_t pfn;
		651	frame_t *frame;
		652	count_t cframes;
2122	decky	653	unsigned int i;
822	palkovsky	654
1780	jermar	655	pfn = ADDR2PFN((uintptr_t)KA2PA(oldzone));
822	palkovsky	656	cframes = SIZE2FRAMES(zone_conf_size(oldzone->count));
		657
		658	if (pfn < newzone->base \|\| pfn >= newzone->base + newzone->count)
		659	return;
		660
		661	frame = &newzone->frames[pfn - newzone->base];
824	palkovsky	662	ASSERT(!frame->buddy_order);
822	palkovsky	663
2122	decky	664	for (i = 0; i < cframes; i++) {
822	palkovsky	665	newzone->busy_count++;
		666	zone_frame_free(newzone, pfn+i-newzone->base);
		667	}
		668	}
		669
3185	jermar	670	/** Reduce allocated block to count of order 0 frames.
824	palkovsky	671	*
		672	* The allocated block need 2^order frames of space. Reduce all frames
1568	palkovsky	673	* in block to order 0 and free the unneeded frames. This means, that
		674	* when freeing the previously allocated block starting with frame_idx,
		675	* you have to free every frame.
824	palkovsky	676	*
		677	* @param zone
3185	jermar	678	* @param frame_idx Index to block.
		679	* @param count Allocated space in block.
824	palkovsky	680	*/
		681	static void zone_reduce_region(zone_t *zone, pfn_t frame_idx, count_t count)
		682	{
		683	count_t i;
1780	jermar	684	uint8_t order;
824	palkovsky	685	frame_t *frame;
		686
2122	decky	687	ASSERT(frame_idx + count < zone->count);
824	palkovsky	688
		689	order = zone->frames[frame_idx].buddy_order;
2122	decky	690	ASSERT((count_t) (1 << order) >= count);
824	palkovsky	691
		692	/* Reduce all blocks to order 0 */
2122	decky	693	for (i = 0; i < (count_t) (1 << order); i++) {
824	palkovsky	694	frame = &zone->frames[i + frame_idx];
		695	frame->buddy_order = 0;
2133	jermar	696	if (!frame->refcount)
824	palkovsky	697	frame->refcount = 1;
		698	ASSERT(frame->refcount == 1);
		699	}
		700	/* Free unneeded frames */
2122	decky	701	for (i = count; i < (count_t) (1 << order); i++) {
824	palkovsky	702	zone_frame_free(zone, i + frame_idx);
		703	}
		704	}
		705
3185	jermar	706	/** Merge zones z1 and z2.
822	palkovsky	707	*
		708	* - the zones must be 2 zones with no zone existing in between,
		709	* which means that z2 = z1+1
		710	*
		711	* - When you create a new zone, the frame allocator configuration does
		712	* not to be 2^order size. Once the allocator is running it is no longer
		713	* possible, merged configuration data occupies more space :-/
		714	*/
2122	decky	715	void zone_merge(unsigned int z1, unsigned int z2)
822	palkovsky	716	{
		717	ipl_t ipl;
		718	zone_t zone1, zone2, *newzone;
2122	decky	719	unsigned int cframes;
1780	jermar	720	uint8_t order;
2122	decky	721	unsigned int i;
822	palkovsky	722	pfn_t pfn;
		723
		724	ipl = interrupts_disable();
		725	spinlock_lock(&zones.lock);
		726
2745	decky	727	if ((z1 >= zones.count) \|\| (z2 >= zones.count))
822	palkovsky	728	goto errout;
		729	/* We can join only 2 zones with none existing inbetween */
3188	jermar	730	if (z2 - z1 != 1)
822	palkovsky	731	goto errout;
		732
		733	zone1 = zones.info[z1];
		734	zone2 = zones.info[z2];
		735	spinlock_lock(&zone1->lock);
		736	spinlock_lock(&zone2->lock);
		737
2133	jermar	738	cframes = SIZE2FRAMES(zone_conf_size(zone2->base + zone2->count -
		739	zone1->base));
1700	palkovsky	740	if (cframes == 1)
		741	order = 0;
		742	else
		743	order = fnzb(cframes - 1) + 1;
822	palkovsky	744
		745	/* Allocate zonedata inside one of the zones */
		746	if (zone_can_alloc(zone1, order))
		747	pfn = zone1->base + zone_frame_alloc(zone1, order);
		748	else if (zone_can_alloc(zone2, order))
		749	pfn = zone2->base + zone_frame_alloc(zone2, order);
		750	else
		751	goto errout2;
		752
2122	decky	753	newzone = (zone_t *) PA2KA(PFN2ADDR(pfn));
822	palkovsky	754
		755	_zone_merge(newzone, zone1, zone2);
		756
824	palkovsky	757	/* Free unneeded config frames */
		758	zone_reduce_region(newzone, pfn - newzone->base, cframes);
822	palkovsky	759	/* Subtract zone information from busy frames */
824	palkovsky	760	newzone->busy_count -= cframes;
822	palkovsky	761
824	palkovsky	762	/* Replace existing zones in zoneinfo list */
822	palkovsky	763	zones.info[z1] = newzone;
1037	decky	764	for (i = z2 + 1; i < zones.count; i++)
		765	zones.info[i - 1] = zones.info[i];
822	palkovsky	766	zones.count--;
		767
		768	/* Free old zone information */
		769	return_config_frames(newzone, zone1);
		770	return_config_frames(newzone, zone2);
		771	errout2:
		772	/* Nobody is allowed to enter to zone, so we are safe
		773	* to touch the spinlocks last time */
		774	spinlock_unlock(&zone1->lock);
		775	spinlock_unlock(&zone2->lock);
		776	errout:
		777	spinlock_unlock(&zones.lock);
		778	interrupts_restore(ipl);
		779	}
		780
3185	jermar	781	/** Merge all zones into one big zone.
822	palkovsky	782	*
		783	* It is reasonable to do this on systems whose bios reports parts in chunks,
		784	* so that we could have 1 zone (it's faster).
		785	*/
		786	void zone_merge_all(void)
		787	{
		788	int count = zones.count;
		789
		790	while (zones.count > 1 && --count) {
3188	jermar	791	zone_merge(0, 1);
822	palkovsky	792	break;
		793	}
		794	}
		795
3185	jermar	796	/** Create new frame zone.
814	palkovsky	797	*
3185	jermar	798	* @param start Physical address of the first frame within the zone.
		799	* @param count Count of frames in zone.
		800	* @param z Address of configuration information of zone.
		801	* @param flags Zone flags.
814	palkovsky	802	*
3185	jermar	803	* @return Initialized zone.
814	palkovsky	804	*/
822	palkovsky	805	static void zone_construct(pfn_t start, count_t count, zone_t *z, int flags)
814	palkovsky	806	{
2122	decky	807	unsigned int i;
1780	jermar	808	uint8_t max_order;
814	palkovsky	809
		810	spinlock_initialize(&z->lock, "zone_lock");
		811	z->base = start;
		812	z->count = count;
		813	z->flags = flags;
		814	z->free_count = count;
		815	z->busy_count = 0;
		816
		817	/*
		818	* Compute order for buddy system, initialize
		819	*/
822	palkovsky	820	max_order = fnzb(count);
814	palkovsky	821	z->buddy_system = (buddy_system_t *)&z[1];
		822
		823	buddy_system_create(z->buddy_system, max_order,
3185	jermar	824	&zone_buddy_system_operations, (void *) z);
814	palkovsky	825
		826	/* Allocate frames _after_ the conframe */
		827	/* Check sizes */
2133	jermar	828	z->frames = (frame_t )((uint8_t ) z->buddy_system +
		829	buddy_conf_size(max_order));
2122	decky	830	for (i = 0; i < count; i++) {
814	palkovsky	831	frame_initialize(&z->frames[i]);
		832	}
852	palkovsky	833
814	palkovsky	834	/* Stuffing frames */
		835	for (i = 0; i < count; i++) {
		836	z->frames[i].refcount = 0;
		837	buddy_system_free(z->buddy_system, &z->frames[i].buddy_link);
		838	}
		839	}
		840
3185	jermar	841	/** Compute configuration data size for zone.
1568	palkovsky	842	*
3185	jermar	843	* @param count Size of zone in frames.
		844	* @return Size of zone configuration info (in bytes).
1568	palkovsky	845	*/
1780	jermar	846	uintptr_t zone_conf_size(count_t count)
814	palkovsky	847	{
3057	decky	848	int size = sizeof(zone_t) + count * sizeof(frame_t);
814	palkovsky	849	int max_order;
		850
822	palkovsky	851	max_order = fnzb(count);
814	palkovsky	852	size += buddy_conf_size(max_order);
		853	return size;
		854	}
		855
3185	jermar	856	/** Create and add zone to system.
814	palkovsky	857	*
3185	jermar	858	* @param start First frame number (absolute).
		859	* @param count Size of zone in frames.
		860	* @param confframe Where configuration frames are supposed to be.
		861	* Automatically checks, that we will not disturb the
		862	* kernel and possibly init. If confframe is given
		863	* _outside_ this zone, it is expected, that the area is
		864	* already marked BUSY and big enough to contain
		865	* zone_conf_size() amount of data. If the confframe is
		866	* inside the area, the zone free frame information is
		867	* modified not to include it.
822	palkovsky	868	*
3185	jermar	869	* @return Zone number or -1 on error.
814	palkovsky	870	*/
822	palkovsky	871	int zone_create(pfn_t start, count_t count, pfn_t confframe, int flags)
814	palkovsky	872	{
		873	zone_t *z;
1780	jermar	874	uintptr_t addr;
820	jermar	875	count_t confcount;
2122	decky	876	unsigned int i;
822	palkovsky	877	int znum;
814	palkovsky	878
		879	/* Theoretically we could have here 0, practically make sure
		880	* nobody tries to do that. If some platform requires, remove
		881	* the assert
		882	*/
		883	ASSERT(confframe);
		884	/* If conframe is supposed to be inside our zone, then make sure
		885	* it does not span kernel & init
		886	*/
822	palkovsky	887	confcount = SIZE2FRAMES(zone_conf_size(count));
3188	jermar	888	if (confframe >= start && confframe < start + count) {
		889	for (; confframe < start + count; confframe++) {
814	palkovsky	890	addr = PFN2ADDR(confframe);
2133	jermar	891	if (overlaps(addr, PFN2ADDR(confcount),
		892	KA2PA(config.base), config.kernel_size))
814	palkovsky	893	continue;
1037	decky	894
2133	jermar	895	if (overlaps(addr, PFN2ADDR(confcount),
		896	KA2PA(config.stack_base), config.stack_size))
1833	decky	897	continue;
		898
1037	decky	899	bool overlap = false;
		900	count_t i;
		901	for (i = 0; i < init.cnt; i++)
2133	jermar	902	if (overlaps(addr, PFN2ADDR(confcount),
		903	KA2PA(init.tasks[i].addr),
		904	init.tasks[i].size)) {
1037	decky	905	overlap = true;
		906	break;
		907	}
		908	if (overlap)
		909	continue;
		910
814	palkovsky	911	break;
		912	}
1037	decky	913	if (confframe >= start + count)
814	palkovsky	914	panic("Cannot find configuration data for zone.");
		915	}
		916
2725	decky	917	z = (zone_t *) PA2KA(PFN2ADDR(confframe));
822	palkovsky	918	zone_construct(start, count, z, flags);
		919	znum = zones_add_zone(z);
		920	if (znum == -1)
		921	return -1;
		922
3188	jermar	923	mutex_lock(&mem_avail_mtx);
		924	mem_avail_frames += count;
		925	mutex_unlock(&mem_avail_mtx);
		926
814	palkovsky	927	/* If confdata in zone, mark as unavailable */
2122	decky	928	if (confframe >= start && confframe < start + count)
		929	for (i = confframe; i < confframe + confcount; i++) {
814	palkovsky	930	zone_mark_unavailable(z, i - z->base);
		931	}
3188	jermar	932
822	palkovsky	933	return znum;
814	palkovsky	934	}
		935
		936	/***************************************/
		937	/* Frame functions */
		938
3185	jermar	939	/** Set parent of frame. */
2122	decky	940	void frame_set_parent(pfn_t pfn, void *data, unsigned int hint)
814	palkovsky	941	{
		942	zone_t *zone = find_zone_and_lock(pfn, &hint);
		943
		944	ASSERT(zone);
		945
3188	jermar	946	zone_get_frame(zone, pfn - zone->base)->parent = data;
814	palkovsky	947	spinlock_unlock(&zone->lock);
		948	}
		949
2133	jermar	950	void *frame_get_parent(pfn_t pfn, unsigned int hint)
814	palkovsky	951	{
		952	zone_t *zone = find_zone_and_lock(pfn, &hint);
		953	void *res;
		954
		955	ASSERT(zone);
		956	res = zone_get_frame(zone, pfn - zone->base)->parent;
		957
		958	spinlock_unlock(&zone->lock);
		959	return res;
		960	}
		961
		962	/** Allocate power-of-two frames of physical memory.
		963	*
3185	jermar	964	* @param order Allocate exactly 2^order frames.
		965	* @param flags Flags for host zone selection and address processing.
		966	* @param pzone Preferred zone.
814	palkovsky	967	*
3185	jermar	968	* @return Physical address of the allocated frame.
1269	decky	969	*
814	palkovsky	970	*/
3185	jermar	971	void frame_alloc_generic(uint8_t order, int flags, unsigned int pzone)
814	palkovsky	972	{
		973	ipl_t ipl;
		974	int freed;
		975	pfn_t v;
		976	zone_t *zone;
3188	jermar	977	unsigned long gen = 0;
814	palkovsky	978
		979	loop:
		980	ipl = interrupts_disable();
1269	decky	981
814	palkovsky	982	/*
		983	* First, find suitable frame zone.
		984	*/
1981	jermar	985	zone = find_free_zone_and_lock(order, pzone);
1269	decky	986
814	palkovsky	987	/* If no memory, reclaim some slab memory,
		988	if it does not help, reclaim all */
		989	if (!zone && !(flags & FRAME_NO_RECLAIM)) {
		990	freed = slab_reclaim(0);
		991	if (freed)
1981	jermar	992	zone = find_free_zone_and_lock(order, pzone);
814	palkovsky	993	if (!zone) {
		994	freed = slab_reclaim(SLAB_RECLAIM_ALL);
		995	if (freed)
1981	jermar	996	zone = find_free_zone_and_lock(order, pzone);
814	palkovsky	997	}
		998	}
		999	if (!zone) {
		1000	/*
3187	jermar	1001	* Sleep until some frames are available again.
814	palkovsky	1002	*/
3187	jermar	1003	if (flags & FRAME_ATOMIC) {
		1004	interrupts_restore(ipl);
1760	palkovsky	1005	return 0;
3187	jermar	1006	}
814	palkovsky	1007
3187	jermar	1008	#ifdef CONFIG_DEBUG
3188	jermar	1009	unsigned long avail;
		1010
		1011	mutex_lock(&mem_avail_mtx);
		1012	avail = mem_avail_frames;
		1013	mutex_unlock(&mem_avail_mtx);
		1014
		1015	printf("Thread %" PRIu64 " waiting for %u frames, "
		1016	"%u available.\n", THREAD->tid, 1ULL << order, avail);
3187	jermar	1017	#endif
		1018
3188	jermar	1019	mutex_lock(&mem_avail_mtx);
		1020	while ((mem_avail_frames < (1ULL << order)) \|\|
		1021	gen == mem_avail_gen)
		1022	condvar_wait(&mem_avail_cv, &mem_avail_mtx);
		1023	gen = mem_avail_gen;
		1024	mutex_unlock(&mem_avail_mtx);
3187	jermar	1025
		1026	#ifdef CONFIG_DEBUG
3188	jermar	1027	mutex_lock(&mem_avail_mtx);
		1028	avail = mem_avail_frames;
		1029	mutex_unlock(&mem_avail_mtx);
		1030
		1031	printf("Thread %" PRIu64 " woken up, %u frames available.\n",
		1032	THREAD->tid, avail);
3187	jermar	1033	#endif
		1034
		1035	interrupts_restore(ipl);
814	palkovsky	1036	goto loop;
		1037	}
1269	decky	1038
		1039	v = zone_frame_alloc(zone, order);
814	palkovsky	1040	v += zone->base;
		1041
		1042	spinlock_unlock(&zone->lock);
3188	jermar	1043
		1044	mutex_lock(&mem_avail_mtx);
		1045	mem_avail_frames -= (1ULL << order);
		1046	mutex_unlock(&mem_avail_mtx);
		1047
814	palkovsky	1048	interrupts_restore(ipl);
		1049
1760	palkovsky	1050	if (flags & FRAME_KA)
		1051	return (void *)PA2KA(PFN2ADDR(v));
		1052	return (void *)PFN2ADDR(v);
814	palkovsky	1053	}
		1054
		1055	/** Free a frame.
		1056	*
1854	jermar	1057	* Find respective frame structure for supplied physical frame address.
814	palkovsky	1058	* Decrement frame reference count.
		1059	* If it drops to zero, move the frame structure to free list.
		1060	*
3185	jermar	1061	* @param frame Physical Address of of the frame to be freed.
814	palkovsky	1062	*/
1780	jermar	1063	void frame_free(uintptr_t frame)
814	palkovsky	1064	{
		1065	ipl_t ipl;
		1066	zone_t *zone;
1760	palkovsky	1067	pfn_t pfn = ADDR2PFN(frame);
814	palkovsky	1068
		1069	ipl = interrupts_disable();
3187	jermar	1070
814	palkovsky	1071	/*
		1072	* First, find host frame zone for addr.
		1073	*/
3187	jermar	1074	zone = find_zone_and_lock(pfn, NULL);
814	palkovsky	1075	ASSERT(zone);
		1076
3187	jermar	1077	zone_frame_free(zone, pfn - zone->base);
814	palkovsky	1078
		1079	spinlock_unlock(&zone->lock);
3187	jermar	1080
		1081	/*
		1082	* Signal that some memory has been freed.
		1083	*/
3188	jermar	1084	mutex_lock(&mem_avail_mtx);
		1085	mem_avail_frames++;
		1086	mem_avail_gen++;
		1087	condvar_broadcast(&mem_avail_cv);
		1088	mutex_unlock(&mem_avail_mtx);
3187	jermar	1089
814	palkovsky	1090	interrupts_restore(ipl);
		1091	}
		1092
1236	jermar	1093	/** Add reference to frame.
		1094	*
		1095	* Find respective frame structure for supplied PFN and
		1096	* increment frame reference count.
		1097	*
3185	jermar	1098	* @param pfn Frame number of the frame to be freed.
1236	jermar	1099	*/
		1100	void frame_reference_add(pfn_t pfn)
		1101	{
		1102	ipl_t ipl;
		1103	zone_t *zone;
		1104	frame_t *frame;
814	palkovsky	1105
1236	jermar	1106	ipl = interrupts_disable();
		1107
		1108	/*
		1109	* First, find host frame zone for addr.
		1110	*/
3185	jermar	1111	zone = find_zone_and_lock(pfn, NULL);
1236	jermar	1112	ASSERT(zone);
		1113
3185	jermar	1114	frame = &zone->frames[pfn - zone->base];
1236	jermar	1115	frame->refcount++;
		1116
		1117	spinlock_unlock(&zone->lock);
		1118	interrupts_restore(ipl);
		1119	}
814	palkovsky	1120
3185	jermar	1121	/** Mark given range unavailable in frame zones. */
820	jermar	1122	void frame_mark_unavailable(pfn_t start, count_t count)
814	palkovsky	1123	{
2122	decky	1124	unsigned int i;
814	palkovsky	1125	zone_t *zone;
2122	decky	1126	unsigned int prefzone = 0;
852	palkovsky	1127
2122	decky	1128	for (i = 0; i < count; i++) {
1981	jermar	1129	zone = find_zone_and_lock(start + i, &prefzone);
814	palkovsky	1130	if (!zone) /* PFN not found */
		1131	continue;
1981	jermar	1132	zone_mark_unavailable(zone, start + i - zone->base);
814	palkovsky	1133
		1134	spinlock_unlock(&zone->lock);
		1135	}
		1136	}
		1137
3185	jermar	1138	/** Initialize physical memory management. */
814	palkovsky	1139	void frame_init(void)
		1140	{
		1141	if (config.cpu_active == 1) {
		1142	zones.count = 0;
1981	jermar	1143	spinlock_initialize(&zones.lock, "zones.lock");
3188	jermar	1144	mutex_initialize(&mem_avail_mtx, MUTEX_ACTIVE);
		1145	condvar_initialize(&mem_avail_cv);
814	palkovsky	1146	}
		1147	/* Tell the architecture to create some memory */
		1148	frame_arch_init();
		1149	if (config.cpu_active == 1) {
2133	jermar	1150	frame_mark_unavailable(ADDR2PFN(KA2PA(config.base)),
		1151	SIZE2FRAMES(config.kernel_size));
		1152	frame_mark_unavailable(ADDR2PFN(KA2PA(config.stack_base)),
		1153	SIZE2FRAMES(config.stack_size));
1037	decky	1154
		1155	count_t i;
2133	jermar	1156	for (i = 0; i < init.cnt; i++) {
		1157	pfn_t pfn = ADDR2PFN(KA2PA(init.tasks[i].addr));
		1158	frame_mark_unavailable(pfn,
		1159	SIZE2FRAMES(init.tasks[i].size));
		1160	}
1599	palkovsky	1161
1894	jermar	1162	if (ballocs.size)
2133	jermar	1163	frame_mark_unavailable(ADDR2PFN(KA2PA(ballocs.base)),
		1164	SIZE2FRAMES(ballocs.size));
1894	jermar	1165
1599	palkovsky	1166	/* Black list first frame, as allocating NULL would
1790	jermar	1167	* fail in some places */
1599	palkovsky	1168	frame_mark_unavailable(0, 1);
814	palkovsky	1169	}
		1170	}
		1171
		1172
3185	jermar	1173	/** Return total size of all zones. */
		1174	uint64_t zone_total_size(void)
		1175	{
2725	decky	1176	zone_t *zone = NULL;
		1177	unsigned int i;
		1178	ipl_t ipl;
		1179	uint64_t total = 0;
814	palkovsky	1180
2725	decky	1181	ipl = interrupts_disable();
		1182	spinlock_lock(&zones.lock);
		1183
		1184	for (i = 0; i < zones.count; i++) {
		1185	zone = zones.info[i];
		1186	spinlock_lock(&zone->lock);
		1187	total += (uint64_t) FRAMES2SIZE(zone->count);
		1188	spinlock_unlock(&zone->lock);
		1189	}
		1190
		1191	spinlock_unlock(&zones.lock);
		1192	interrupts_restore(ipl);
		1193
		1194	return total;
		1195	}
		1196
3185	jermar	1197	/** Prints list of zones. */
		1198	void zone_print_list(void)
		1199	{
676	bondari	1200	zone_t *zone = NULL;
2122	decky	1201	unsigned int i;
701	jermar	1202	ipl_t ipl;
		1203
3057	decky	1204	#ifdef __32_BITS__
		1205	printf("# base address free frames busy frames\n");
		1206	printf("-- ------------ ------------ ------------\n");
		1207	#endif
		1208
		1209	#ifdef __64_BITS__
		1210	printf("# base address free frames busy frames\n");
		1211	printf("-- -------------------- ------------ ------------\n");
		1212	#endif
2712	decky	1213
3205	jermar	1214	/*
		1215	* Because printing may require allocation of memory, we may not hold
		1216	* the frame allocator locks when printing zone statistics. Therefore,
		1217	* we simply gather the statistics under the protection of the locks and
		1218	* print the statistics when the locks have been released.
		1219	*
		1220	* When someone adds/removes zones while we are printing the statistics,
		1221	* we may end up with inaccurate output (e.g. a zone being skipped from
		1222	* the listing).
		1223	*/
		1224
		1225	for (i = 0; ; i++) {
		1226	uintptr_t base;
		1227	count_t free_count;
		1228	count_t busy_count;
		1229
		1230	ipl = interrupts_disable();
		1231	spinlock_lock(&zones.lock);
		1232
		1233	if (i >= zones.count) {
		1234	spinlock_unlock(&zones.lock);
		1235	interrupts_restore(ipl);
		1236	break;
		1237	}
		1238
814	palkovsky	1239	zone = zones.info[i];
683	bondari	1240	spinlock_lock(&zone->lock);
3057	decky	1241
3205	jermar	1242	base = PFN2ADDR(zone->base);
		1243	free_count = zone->free_count;
		1244	busy_count = zone->busy_count;
		1245
		1246	spinlock_unlock(&zone->lock);
		1247
		1248	spinlock_unlock(&zones.lock);
		1249	interrupts_restore(ipl);
		1250
3057	decky	1251	#ifdef __32_BITS__
3205	jermar	1252	printf("%-2u %10p %12" PRIc " %12" PRIc "\n", i, base,
		1253	free_count, busy_count);
3057	decky	1254	#endif
		1255
		1256	#ifdef __64_BITS__
3205	jermar	1257	printf("%-2u %18p %12" PRIc " %12" PRIc "\n", i, base,
		1258	free_count, busy_count);
3057	decky	1259	#endif
2712	decky	1260
676	bondari	1261	}
		1262	}
		1263
1708	jermar	1264	/** Prints zone details.
677	bondari	1265	*
3185	jermar	1266	* @param num Zone base address or zone number.
677	bondari	1267	*/
3185	jermar	1268	void zone_print_one(unsigned int num)
		1269	{
814	palkovsky	1270	zone_t *zone = NULL;
701	jermar	1271	ipl_t ipl;
2122	decky	1272	unsigned int i;
3206	jermar	1273	uintptr_t base;
		1274	count_t count;
		1275	count_t busy_count;
		1276	count_t free_count;
701	jermar	1277
		1278	ipl = interrupts_disable();
814	palkovsky	1279	spinlock_lock(&zones.lock);
822	palkovsky	1280
1037	decky	1281	for (i = 0; i < zones.count; i++) {
2725	decky	1282	if ((i == num) \|\| (PFN2ADDR(zones.info[i]->base) == num)) {
822	palkovsky	1283	zone = zones.info[i];
		1284	break;
		1285	}
676	bondari	1286	}
822	palkovsky	1287	if (!zone) {
3206	jermar	1288	spinlock_unlock(&zones.lock);
		1289	interrupts_restore(ipl);
822	palkovsky	1290	printf("Zone not found.\n");
3206	jermar	1291	return;
822	palkovsky	1292	}
676	bondari	1293
683	bondari	1294	spinlock_lock(&zone->lock);
3206	jermar	1295	base = PFN2ADDR(zone->base);
		1296	count = zone->count;
		1297	busy_count = zone->busy_count;
		1298	free_count = zone->free_count;
2725	decky	1299	spinlock_unlock(&zone->lock);
814	palkovsky	1300	spinlock_unlock(&zones.lock);
701	jermar	1301	interrupts_restore(ipl);
3206	jermar	1302
		1303	printf("Zone base address: %p\n", base);
		1304	printf("Zone size: %" PRIc " frames (%" PRIs " KiB)\n", count,
		1305	SIZE2KB(FRAMES2SIZE(count)));
		1306	printf("Allocated space: %" PRIc " frames (%" PRIs " KiB)\n",
		1307	busy_count, SIZE2KB(FRAMES2SIZE(busy_count)));
		1308	printf("Available space: %" PRIc " frames (%" PRIs " KiB)\n",
		1309	free_count, SIZE2KB(FRAMES2SIZE(free_count)));
676	bondari	1310	}
		1311
1757	jermar	1312	/** @}
1702	cejka	1313	*/
2133	jermar	1314

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(root)/trunk/kernel/generic/src/mm/frame.c @ 2071 – Rev 3206