source: mainline/kernel/generic/include/mm/frame.h@ ca62f86

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since ca62f86 was aaceebc4, checked in by Jan Vesely <jano.vesely@…>, 12 years ago

Create DMA zone.

use dma zone for dma_map_anonymous calls.
create non-available zone if all pages in that zone are used.
make occupying pages in non-available zones a no-op

This enables ISA DMA on configurations with more than 16 MB of ram
  • Property mode set to 100644
File size: 6.7 KB
Line 
1/*
2 * Copyright (c) 2005 Jakub Jermar
3 * Copyright (c) 2005 Sergey Bondari
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
30/** @addtogroup genericmm
31 * @{
32 */
33/** @file
34 */
35
36#ifndef KERN_FRAME_H_
37#define KERN_FRAME_H_
38
39#include <typedefs.h>
40#include <trace.h>
41#include <adt/list.h>
42#include <mm/buddy.h>
43#include <synch/spinlock.h>
44#include <arch/mm/page.h>
45#include <arch/mm/frame.h>
46
47/** Maximum number of zones in the system. */
48#define ZONES_MAX 32
49
50typedef uint8_t frame_flags_t;
51
52#define FRAME_NONE 0x0
53/** Convert the frame address to kernel VA. */
54#define FRAME_KA 0x1
55/** Do not panic and do not sleep on failure. */
56#define FRAME_ATOMIC 0x2
57/** Do not start reclaiming when no free memory. */
58#define FRAME_NO_RECLAIM 0x4
59/** Do not reserve / unreserve memory. */
60#define FRAME_NO_RESERVE 0x8
61/** Allocate a frame which can be identity-mapped. */
62#define FRAME_LOWMEM 0x10
63/** Allocate a frame which cannot be identity-mapped. */
64#define FRAME_HIGHMEM 0x20
65/** Allocate a frame which needs to be from DMA zone. */
66#define FRAME_DMA 0x40
67
68typedef uint8_t zone_flags_t;
69
70#define ZONE_NONE 0x0
71/** Available zone (free for allocation) */
72#define ZONE_AVAILABLE 0x1
73/** Zone is reserved (not available for allocation) */
74#define ZONE_RESERVED 0x2
75/** Zone is used by firmware (not available for allocation) */
76#define ZONE_FIRMWARE 0x4
77/** Zone contains memory that can be identity-mapped */
78#define ZONE_LOWMEM 0x8
79/** Zone contains memory that cannot be identity-mapped */
80#define ZONE_HIGHMEM 0x10
81/** Zone contains memory suitable for old ISA DMA */
82#define ZONE_DMA 0x20
83
84/** Mask of zone bits that must be matched exactly. */
85#define ZONE_EF_MASK 0x7
86
87#define FRAME_TO_ZONE_FLAGS(ff) \
88 ((((ff) & FRAME_DMA) ? ZONE_DMA : \
89 (((ff) & FRAME_LOWMEM) ? ZONE_LOWMEM : \
90 (((ff) & FRAME_HIGHMEM) ? ZONE_HIGHMEM : \
91 ZONE_LOWMEM /* | ZONE_HIGHMEM */))) | \
92 ZONE_AVAILABLE)
93
94#define ZONE_FLAGS_MATCH(zf, f) \
95 (((((zf) & ZONE_EF_MASK)) == ((f) & ZONE_EF_MASK)) && \
96 (((zf) & ~ZONE_EF_MASK) & (f)))
97
98typedef struct {
99 size_t refcount; /**< Tracking of shared frames */
100 link_t buddy_link; /**< Link to the next free block inside
101 one order */
102 void *parent; /**< If allocated by slab, this points there */
103 uint8_t buddy_order; /**< Buddy system block order */
104} frame_t;
105
106typedef struct {
107 pfn_t base; /**< Frame_no of the first frame
108 in the frames array */
109 size_t count; /**< Size of zone */
110 size_t free_count; /**< Number of free frame_t
111 structures */
112 size_t busy_count; /**< Number of busy frame_t
113 structures */
114 zone_flags_t flags; /**< Type of the zone */
115
116 frame_t *frames; /**< Array of frame_t structures
117 in this zone */
118 buddy_system_t *buddy_system; /**< Buddy system for the zone */
119} zone_t;
120
121/*
122 * The zoneinfo.lock must be locked when accessing zoneinfo structure.
123 * Some of the attributes in zone_t structures are 'read-only'
124 */
125typedef struct {
126 IRQ_SPINLOCK_DECLARE(lock);
127 size_t count;
128 zone_t info[ZONES_MAX];
129} zones_t;
130
131extern zones_t zones;
132
133NO_TRACE static inline uintptr_t PFN2ADDR(pfn_t frame)
134{
135 return (uintptr_t) (frame << FRAME_WIDTH);
136}
137
138NO_TRACE static inline pfn_t ADDR2PFN(uintptr_t addr)
139{
140 return (pfn_t) (addr >> FRAME_WIDTH);
141}
142
143NO_TRACE static inline size_t SIZE2FRAMES(size_t size)
144{
145 if (!size)
146 return 0;
147 return (size_t) ((size - 1) >> FRAME_WIDTH) + 1;
148}
149
150NO_TRACE static inline size_t FRAMES2SIZE(size_t frames)
151{
152 return (size_t) (frames << FRAME_WIDTH);
153}
154
155#define IS_BUDDY_ORDER_OK(index, order) \
156 ((~(((sysarg_t) -1) << (order)) & (index)) == 0)
157#define IS_BUDDY_LEFT_BLOCK(zone, frame) \
158 (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
159#define IS_BUDDY_RIGHT_BLOCK(zone, frame) \
160 (((frame_index((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
161#define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame) \
162 (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
163#define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame) \
164 (((frame_index_abs((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
165
166extern void frame_init(void);
167extern bool frame_adjust_zone_bounds(bool, uintptr_t *, size_t *);
168extern void *frame_alloc_generic(uint8_t, frame_flags_t, size_t *);
169extern void *frame_alloc(uint8_t, frame_flags_t);
170extern void *frame_alloc_noreserve(uint8_t, frame_flags_t);
171extern void frame_free_generic(uintptr_t, frame_flags_t);
172extern void frame_free(uintptr_t);
173extern void frame_free_noreserve(uintptr_t);
174extern void frame_reference_add(pfn_t);
175extern size_t frame_total_free_get(void);
176
177extern size_t find_zone(pfn_t, size_t, size_t);
178extern size_t zone_create(pfn_t, size_t, pfn_t, zone_flags_t);
179extern void *frame_get_parent(pfn_t, size_t);
180extern void frame_set_parent(pfn_t, void *, size_t);
181extern void frame_mark_unavailable(pfn_t, size_t);
182extern size_t zone_conf_size(size_t);
183extern pfn_t zone_external_conf_alloc(size_t);
184extern bool zone_merge(size_t, size_t);
185extern void zone_merge_all(void);
186extern uint64_t zones_total_size(void);
187extern void zones_stats(uint64_t *, uint64_t *, uint64_t *, uint64_t *);
188
189/*
190 * Console functions
191 */
192extern void zones_print_list(void);
193extern void zone_print_one(size_t);
194
195#endif
196
197/** @}
198 */
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