1 | /*
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2 | * Copyright (c) 2005 Jakub Jermar
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3 | * Copyright (c) 2005 Sergey Bondari
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4 | * All rights reserved.
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5 | *
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6 | * Redistribution and use in source and binary forms, with or without
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7 | * modification, are permitted provided that the following conditions
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8 | * are met:
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9 | *
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10 | * - Redistributions of source code must retain the above copyright
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11 | * notice, this list of conditions and the following disclaimer.
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12 | * - Redistributions in binary form must reproduce the above copyright
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13 | * notice, this list of conditions and the following disclaimer in the
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14 | * documentation and/or other materials provided with the distribution.
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15 | * - The name of the author may not be used to endorse or promote products
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16 | * derived from this software without specific prior written permission.
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17 | *
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18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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28 | */
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29 |
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30 | /** @addtogroup genericmm
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31 | * @{
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32 | */
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33 | /** @file
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34 | */
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35 |
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36 | #ifndef KERN_FRAME_H_
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37 | #define KERN_FRAME_H_
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38 |
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39 | #include <typedefs.h>
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40 | #include <trace.h>
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41 | #include <adt/bitmap.h>
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42 | #include <adt/list.h>
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43 | #include <synch/spinlock.h>
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44 | #include <arch/mm/page.h>
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45 | #include <arch/mm/frame.h>
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46 |
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47 | /** Maximum number of zones in the system. */
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48 | #define ZONES_MAX 32
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49 |
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50 | typedef uint8_t frame_flags_t;
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51 |
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52 | #define FRAME_NONE 0x00
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53 | /** Do not panic and do not sleep on failure. */
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54 | #define FRAME_ATOMIC 0x01
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55 | /** Do not start reclaiming when no free memory. */
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56 | #define FRAME_NO_RECLAIM 0x02
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57 | /** Do not reserve / unreserve memory. */
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58 | #define FRAME_NO_RESERVE 0x04
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59 | /** Allocate a frame which can be identity-mapped. */
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60 | #define FRAME_LOWMEM 0x08
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61 | /** Allocate a frame which cannot be identity-mapped. */
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62 | #define FRAME_HIGHMEM 0x10
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63 |
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64 | typedef uint8_t zone_flags_t;
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65 |
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66 | #define ZONE_NONE 0x00
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67 | /** Available zone (free for allocation) */
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68 | #define ZONE_AVAILABLE 0x01
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69 | /** Zone is reserved (not available for allocation) */
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70 | #define ZONE_RESERVED 0x02
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71 | /** Zone is used by firmware (not available for allocation) */
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72 | #define ZONE_FIRMWARE 0x04
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73 | /** Zone contains memory that can be identity-mapped */
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74 | #define ZONE_LOWMEM 0x08
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75 | /** Zone contains memory that cannot be identity-mapped */
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76 | #define ZONE_HIGHMEM 0x10
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77 |
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78 | /** Mask of zone bits that must be matched exactly. */
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79 | #define ZONE_EF_MASK 0x07
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80 |
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81 | #define FRAME_TO_ZONE_FLAGS(ff) \
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82 | ((((ff) & FRAME_LOWMEM) ? ZONE_LOWMEM : \
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83 | (((ff) & FRAME_HIGHMEM) ? ZONE_HIGHMEM : \
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84 | ZONE_LOWMEM /* | ZONE_HIGHMEM */)) | \
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85 | ZONE_AVAILABLE)
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86 |
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87 | #define ZONE_FLAGS_MATCH(zf, f) \
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88 | (((((zf) & ZONE_EF_MASK)) == ((f) & ZONE_EF_MASK)) && \
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89 | (((zf) & ~ZONE_EF_MASK) & (f)))
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90 |
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91 | typedef struct {
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92 | size_t refcount; /**< Tracking of shared frames */
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93 | void *parent; /**< If allocated by slab, this points there */
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94 | } frame_t;
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95 |
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96 | typedef struct {
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97 | /** Frame_no of the first frame in the frames array */
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98 | pfn_t base;
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99 |
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100 | /** Size of zone */
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101 | size_t count;
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102 |
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103 | /** Number of free frame_t structures */
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104 | size_t free_count;
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105 |
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106 | /** Number of busy frame_t structures */
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107 | size_t busy_count;
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108 |
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109 | /** Type of the zone */
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110 | zone_flags_t flags;
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111 |
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112 | /** Frame bitmap */
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113 | bitmap_t bitmap;
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114 |
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115 | /** Array of frame_t structures in this zone */
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116 | frame_t *frames;
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117 | } zone_t;
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118 |
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119 | /*
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120 | * The zoneinfo.lock must be locked when accessing zoneinfo structure.
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121 | * Some of the attributes in zone_t structures are 'read-only'
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122 | */
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123 | typedef struct {
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124 | IRQ_SPINLOCK_DECLARE(lock);
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125 | size_t count;
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126 | zone_t info[ZONES_MAX];
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127 | } zones_t;
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128 |
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129 | extern zones_t zones;
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130 |
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131 | extern void frame_init(void);
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132 | extern bool frame_adjust_zone_bounds(bool, uintptr_t *, size_t *);
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133 | extern uintptr_t frame_alloc_generic(size_t, frame_flags_t, uintptr_t,
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134 | size_t *);
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135 | extern uintptr_t frame_alloc(size_t, frame_flags_t, uintptr_t);
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136 | extern void frame_free_generic(uintptr_t, size_t, frame_flags_t);
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137 | extern void frame_free(uintptr_t, size_t);
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138 | extern void frame_free_noreserve(uintptr_t, size_t);
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139 | extern void frame_reference_add(pfn_t);
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140 | extern size_t frame_total_free_get(void);
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141 |
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142 | extern size_t find_zone(pfn_t, size_t, size_t);
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143 | extern size_t zone_create(pfn_t, size_t, pfn_t, zone_flags_t);
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144 | extern void *frame_get_parent(pfn_t, size_t);
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145 | extern void frame_set_parent(pfn_t, void *, size_t);
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146 | extern void frame_mark_unavailable(pfn_t, size_t);
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147 | extern size_t zone_conf_size(size_t);
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148 | extern pfn_t zone_external_conf_alloc(size_t);
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149 | extern bool zone_merge(size_t, size_t);
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150 | extern void zone_merge_all(void);
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151 | extern uint64_t zones_total_size(void);
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152 | extern void zones_stats(uint64_t *, uint64_t *, uint64_t *, uint64_t *);
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153 |
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154 | /*
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155 | * Console functions
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156 | */
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157 | extern void zones_print_list(void);
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158 | extern void zone_print_one(size_t);
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159 |
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160 | #endif
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161 |
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162 | /** @}
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163 | */
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