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1 | jermar | 1 | /* |
564 | jermar | 2 | * Copyright (C) 2001-2005 Jakub Jermar |
3 | * Copyright (C) 2005 Sergey Bondari |
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1 | jermar | 4 | * All rights reserved. |
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 | |||
368 | jermar | 30 | #include <typedefs.h> |
1 | jermar | 31 | #include <arch/types.h> |
32 | #include <mm/heap.h> |
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33 | #include <mm/frame.h> |
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703 | jermar | 34 | #include <mm/as.h> |
1 | jermar | 35 | #include <panic.h> |
367 | jermar | 36 | #include <debug.h> |
368 | jermar | 37 | #include <list.h> |
1 | jermar | 38 | #include <synch/spinlock.h> |
115 | jermar | 39 | #include <arch/asm.h> |
195 | vana | 40 | #include <arch.h> |
533 | bondari | 41 | #include <print.h> |
536 | bondari | 42 | #include <align.h> |
115 | jermar | 43 | |
623 | jermar | 44 | SPINLOCK_INITIALIZE(zone_head_lock); /**< this lock protects zone_head list */ |
624 | jermar | 45 | LIST_INITIALIZE(zone_head); /**< list of all zones in the system */ |
367 | jermar | 46 | |
539 | jermar | 47 | /** Blacklist containing non-available areas of memory. |
48 | * |
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49 | * This blacklist is used to exclude frames that cannot be allocated |
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50 | * (e.g. kernel memory) from available memory map. |
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51 | */ |
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533 | bondari | 52 | region_t zone_blacklist[ZONE_BLACKLIST_SIZE]; |
53 | count_t zone_blacklist_count = 0; |
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54 | |||
479 | bondari | 55 | static struct buddy_system_operations zone_buddy_system_operations = { |
56 | .find_buddy = zone_buddy_find_buddy, |
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57 | .bisect = zone_buddy_bisect, |
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58 | .coalesce = zone_buddy_coalesce, |
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59 | .set_order = zone_buddy_set_order, |
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60 | .get_order = zone_buddy_get_order, |
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533 | bondari | 61 | .mark_busy = zone_buddy_mark_busy, |
479 | bondari | 62 | }; |
63 | |||
368 | jermar | 64 | /** Initialize physical memory management |
65 | * |
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66 | * Initialize physical memory managemnt. |
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67 | */ |
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1 | jermar | 68 | void frame_init(void) |
69 | { |
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125 | jermar | 70 | if (config.cpu_active == 1) { |
537 | jermar | 71 | frame_region_not_free(KA2PA(config.base), config.kernel_size); |
629 | decky | 72 | if (config.init_size > 0) |
73 | frame_region_not_free(KA2PA(config.init_addr), config.init_size); |
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1 | jermar | 74 | } |
75 | |||
76 | frame_arch_init(); |
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77 | } |
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78 | |||
537 | jermar | 79 | /** Allocate power-of-two frames of physical memory. |
368 | jermar | 80 | * |
81 | * @param flags Flags for host zone selection and address processing. |
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537 | jermar | 82 | * @param order Allocate exactly 2^order frames. |
368 | jermar | 83 | * |
84 | * @return Allocated frame. |
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1 | jermar | 85 | */ |
689 | bondari | 86 | __address frame_alloc(int flags, __u8 order, int * status) |
1 | jermar | 87 | { |
413 | jermar | 88 | ipl_t ipl; |
368 | jermar | 89 | link_t *cur, *tmp; |
90 | zone_t *z; |
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91 | zone_t *zone = NULL; |
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92 | frame_t *frame = NULL; |
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93 | __address v; |
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1 | jermar | 94 | |
95 | loop: |
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413 | jermar | 96 | ipl = interrupts_disable(); |
368 | jermar | 97 | spinlock_lock(&zone_head_lock); |
533 | bondari | 98 | |
368 | jermar | 99 | /* |
100 | * First, find suitable frame zone. |
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101 | */ |
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102 | for (cur = zone_head.next; cur != &zone_head; cur = cur->next) { |
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103 | z = list_get_instance(cur, zone_t, link); |
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1 | jermar | 104 | |
368 | jermar | 105 | spinlock_lock(&z->lock); |
533 | bondari | 106 | |
107 | /* Check if the zone has 2^order frames area available */ |
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108 | if (buddy_system_can_alloc(z->buddy_system, order)) { |
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368 | jermar | 109 | zone = z; |
110 | break; |
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1 | jermar | 111 | } |
533 | bondari | 112 | |
368 | jermar | 113 | spinlock_unlock(&z->lock); |
1 | jermar | 114 | } |
368 | jermar | 115 | |
116 | if (!zone) { |
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117 | if (flags & FRAME_PANIC) |
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118 | panic("Can't allocate frame.\n"); |
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119 | |||
120 | /* |
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121 | * TODO: Sleep until frames are available again. |
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122 | */ |
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123 | spinlock_unlock(&zone_head_lock); |
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413 | jermar | 124 | interrupts_restore(ipl); |
1 | jermar | 125 | |
689 | bondari | 126 | if (flags & FRAME_NON_BLOCKING) { |
127 | ASSERT(status != NULL); |
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128 | *status = FRAME_NO_MEMORY; |
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129 | return NULL; |
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130 | } |
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131 | |||
368 | jermar | 132 | panic("Sleep not implemented.\n"); |
133 | goto loop; |
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134 | } |
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1 | jermar | 135 | |
533 | bondari | 136 | /* Allocate frames from zone buddy system */ |
539 | jermar | 137 | tmp = buddy_system_alloc(zone->buddy_system, order); |
1 | jermar | 138 | |
539 | jermar | 139 | ASSERT(tmp); |
533 | bondari | 140 | |
539 | jermar | 141 | /* Update zone information. */ |
142 | zone->free_count -= (1 << order); |
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143 | zone->busy_count += (1 << order); |
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144 | |||
145 | /* Frame will be actually a first frame of the block. */ |
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146 | frame = list_get_instance(tmp, frame_t, buddy_link); |
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147 | |||
533 | bondari | 148 | /* get frame address */ |
479 | bondari | 149 | v = FRAME2ADDR(zone, frame); |
533 | bondari | 150 | |
539 | jermar | 151 | spinlock_unlock(&zone->lock); |
152 | spinlock_unlock(&zone_head_lock); |
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153 | interrupts_restore(ipl); |
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154 | |||
368 | jermar | 155 | if (flags & FRAME_KA) |
156 | v = PA2KA(v); |
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157 | |||
689 | bondari | 158 | if (flags & FRAME_NON_BLOCKING) { |
159 | ASSERT(status != NULL); |
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160 | *status = FRAME_OK; |
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161 | } |
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368 | jermar | 162 | return v; |
1 | jermar | 163 | } |
164 | |||
368 | jermar | 165 | /** Free a frame. |
166 | * |
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167 | * Find respective frame structrue for supplied addr. |
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168 | * Decrement frame reference count. |
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169 | * If it drops to zero, move the frame structure to free list. |
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170 | * |
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171 | * @param addr Address of the frame to be freed. It must be a multiple of FRAME_SIZE. |
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1 | jermar | 172 | */ |
173 | void frame_free(__address addr) |
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174 | { |
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413 | jermar | 175 | ipl_t ipl; |
368 | jermar | 176 | link_t *cur; |
177 | zone_t *z; |
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178 | zone_t *zone = NULL; |
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179 | frame_t *frame; |
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724 | palkovsky | 180 | int order; |
181 | |||
368 | jermar | 182 | ASSERT(addr % FRAME_SIZE == 0); |
1 | jermar | 183 | |
413 | jermar | 184 | ipl = interrupts_disable(); |
368 | jermar | 185 | spinlock_lock(&zone_head_lock); |
1 | jermar | 186 | |
368 | jermar | 187 | /* |
188 | * First, find host frame zone for addr. |
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189 | */ |
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190 | for (cur = zone_head.next; cur != &zone_head; cur = cur->next) { |
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191 | z = list_get_instance(cur, zone_t, link); |
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192 | |||
193 | spinlock_lock(&z->lock); |
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194 | |||
195 | if (IS_KA(addr)) |
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196 | addr = KA2PA(addr); |
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197 | |||
198 | /* |
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199 | * Check if addr belongs to z. |
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200 | */ |
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201 | if ((addr >= z->base) && (addr <= z->base + (z->free_count + z->busy_count) * FRAME_SIZE)) { |
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202 | zone = z; |
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203 | break; |
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1 | jermar | 204 | } |
701 | jermar | 205 | |
368 | jermar | 206 | spinlock_unlock(&z->lock); |
1 | jermar | 207 | } |
208 | |||
368 | jermar | 209 | ASSERT(zone != NULL); |
210 | |||
479 | bondari | 211 | frame = ADDR2FRAME(zone, addr); |
724 | palkovsky | 212 | |
213 | /* remember frame order */ |
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214 | order = frame->buddy_order; |
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533 | bondari | 215 | |
368 | jermar | 216 | ASSERT(frame->refcount); |
217 | |||
218 | if (!--frame->refcount) { |
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533 | bondari | 219 | buddy_system_free(zone->buddy_system, &frame->buddy_link); |
368 | jermar | 220 | } |
539 | jermar | 221 | |
222 | /* Update zone information. */ |
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724 | palkovsky | 223 | zone->free_count += (1 << order); |
224 | zone->busy_count -= (1 << order); |
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368 | jermar | 225 | |
539 | jermar | 226 | spinlock_unlock(&zone->lock); |
368 | jermar | 227 | spinlock_unlock(&zone_head_lock); |
413 | jermar | 228 | interrupts_restore(ipl); |
1 | jermar | 229 | } |
230 | |||
368 | jermar | 231 | /** Mark frame region not free. |
232 | * |
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233 | * Mark frame region not free. |
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234 | * |
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537 | jermar | 235 | * @param base Base address of non-available region. |
236 | * @param size Size of non-available region. |
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368 | jermar | 237 | */ |
533 | bondari | 238 | void frame_region_not_free(__address base, size_t size) |
1 | jermar | 239 | { |
537 | jermar | 240 | index_t index; |
533 | bondari | 241 | index = zone_blacklist_count++; |
537 | jermar | 242 | |
243 | /* Force base to the nearest lower address frame boundary. */ |
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564 | jermar | 244 | base = ALIGN_DOWN(base, FRAME_SIZE); |
537 | jermar | 245 | /* Align size to frame boundary. */ |
564 | jermar | 246 | size = ALIGN_UP(size, FRAME_SIZE); |
537 | jermar | 247 | |
564 | jermar | 248 | ASSERT(index < ZONE_BLACKLIST_SIZE); |
533 | bondari | 249 | zone_blacklist[index].base = base; |
250 | zone_blacklist[index].size = size; |
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1 | jermar | 251 | } |
367 | jermar | 252 | |
539 | jermar | 253 | /** Create frame zones in region of available memory. |
254 | * |
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255 | * Avoid any black listed areas of non-available memory. |
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256 | * Assume that the black listed areas cannot overlap |
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257 | * one another or cross available memory region boundaries. |
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258 | * |
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259 | * @param base Base address of available memory region. |
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260 | * @param size Size of the region. |
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261 | */ |
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533 | bondari | 262 | void zone_create_in_region(__address base, size_t size) { |
263 | int i; |
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264 | zone_t * z; |
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537 | jermar | 265 | __address s; |
266 | size_t sz; |
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533 | bondari | 267 | |
268 | ASSERT(base % FRAME_SIZE == 0); |
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269 | ASSERT(size % FRAME_SIZE == 0); |
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270 | |||
537 | jermar | 271 | if (!size) |
272 | return; |
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273 | |||
533 | bondari | 274 | for (i = 0; i < zone_blacklist_count; i++) { |
275 | if (zone_blacklist[i].base >= base && zone_blacklist[i].base < base + size) { |
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276 | s = base; sz = zone_blacklist[i].base - base; |
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277 | ASSERT(base != s || sz != size); |
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278 | zone_create_in_region(s, sz); |
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279 | |||
280 | s = zone_blacklist[i].base + zone_blacklist[i].size; |
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281 | sz = (base + size) - (zone_blacklist[i].base + zone_blacklist[i].size); |
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282 | ASSERT(base != s || sz != size); |
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283 | zone_create_in_region(s, sz); |
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284 | return; |
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285 | |||
286 | } |
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287 | } |
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288 | |||
289 | z = zone_create(base, size, 0); |
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290 | |||
291 | if (!z) { |
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564 | jermar | 292 | panic("Cannot allocate zone (base=%P, size=%d).\n", base, size); |
533 | bondari | 293 | } |
294 | |||
295 | zone_attach(z); |
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296 | } |
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297 | |||
298 | |||
367 | jermar | 299 | /** Create frame zone |
300 | * |
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301 | * Create new frame zone. |
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302 | * |
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303 | * @param start Physical address of the first frame within the zone. |
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304 | * @param size Size of the zone. Must be a multiple of FRAME_SIZE. |
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305 | * @param flags Zone flags. |
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306 | * |
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307 | * @return Initialized zone. |
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308 | */ |
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533 | bondari | 309 | zone_t * zone_create(__address start, size_t size, int flags) |
367 | jermar | 310 | { |
311 | zone_t *z; |
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312 | count_t cnt; |
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313 | int i; |
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479 | bondari | 314 | __u8 max_order; |
533 | bondari | 315 | |
367 | jermar | 316 | ASSERT(start % FRAME_SIZE == 0); |
317 | ASSERT(size % FRAME_SIZE == 0); |
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318 | |||
319 | cnt = size / FRAME_SIZE; |
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320 | |||
374 | jermar | 321 | z = (zone_t *) early_malloc(sizeof(zone_t)); |
367 | jermar | 322 | if (z) { |
323 | link_initialize(&z->link); |
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552 | palkovsky | 324 | spinlock_initialize(&z->lock, "zone_lock"); |
367 | jermar | 325 | |
326 | z->base = start; |
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724 | palkovsky | 327 | z->base_index = start / FRAME_SIZE; |
328 | |||
367 | jermar | 329 | z->flags = flags; |
330 | |||
331 | z->free_count = cnt; |
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332 | z->busy_count = 0; |
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333 | |||
374 | jermar | 334 | z->frames = (frame_t *) early_malloc(cnt * sizeof(frame_t)); |
367 | jermar | 335 | if (!z->frames) { |
375 | jermar | 336 | early_free(z); |
367 | jermar | 337 | return NULL; |
338 | } |
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339 | |||
340 | for (i = 0; i<cnt; i++) { |
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341 | frame_initialize(&z->frames[i], z); |
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342 | } |
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343 | |||
479 | bondari | 344 | /* |
345 | * Create buddy system for the zone |
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346 | */ |
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537 | jermar | 347 | for (max_order = 0; cnt >> max_order; max_order++) |
348 | ; |
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489 | jermar | 349 | z->buddy_system = buddy_system_create(max_order, &zone_buddy_system_operations, (void *) z); |
533 | bondari | 350 | |
351 | /* Stuffing frames */ |
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352 | for (i = 0; i<cnt; i++) { |
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353 | z->frames[i].refcount = 0; |
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354 | buddy_system_free(z->buddy_system, &z->frames[i].buddy_link); |
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355 | } |
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724 | palkovsky | 356 | |
367 | jermar | 357 | } |
358 | return z; |
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359 | } |
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360 | |||
361 | /** Attach frame zone |
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362 | * |
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363 | * Attach frame zone to zone list. |
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364 | * |
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365 | * @param zone Zone to be attached. |
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366 | */ |
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367 | void zone_attach(zone_t *zone) |
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368 | { |
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413 | jermar | 369 | ipl_t ipl; |
367 | jermar | 370 | |
413 | jermar | 371 | ipl = interrupts_disable(); |
367 | jermar | 372 | spinlock_lock(&zone_head_lock); |
373 | |||
374 | list_append(&zone->link, &zone_head); |
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375 | |||
376 | spinlock_unlock(&zone_head_lock); |
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413 | jermar | 377 | interrupts_restore(ipl); |
367 | jermar | 378 | } |
379 | |||
380 | /** Initialize frame structure |
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381 | * |
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382 | * Initialize frame structure. |
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383 | * |
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384 | * @param frame Frame structure to be initialized. |
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385 | * @param zone Host frame zone. |
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386 | */ |
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387 | void frame_initialize(frame_t *frame, zone_t *zone) |
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388 | { |
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533 | bondari | 389 | frame->refcount = 1; |
390 | frame->buddy_order = 0; |
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367 | jermar | 391 | } |
479 | bondari | 392 | |
393 | |||
394 | /** Buddy system find_buddy implementation |
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489 | jermar | 395 | * |
396 | * @param b Buddy system. |
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480 | bondari | 397 | * @param block Block for which buddy should be found |
479 | bondari | 398 | * |
480 | bondari | 399 | * @return Buddy for given block if found |
479 | bondari | 400 | */ |
489 | jermar | 401 | link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * block) { |
539 | jermar | 402 | frame_t * frame; |
480 | bondari | 403 | zone_t * zone; |
564 | jermar | 404 | index_t index; |
480 | bondari | 405 | bool is_left, is_right; |
479 | bondari | 406 | |
480 | bondari | 407 | frame = list_get_instance(block, frame_t, buddy_link); |
533 | bondari | 408 | zone = (zone_t *) b->data; |
724 | palkovsky | 409 | ASSERT(IS_BUDDY_ORDER_OK(FRAME_INDEX_ABS(zone, frame), frame->buddy_order)); |
480 | bondari | 410 | |
564 | jermar | 411 | |
724 | palkovsky | 412 | is_left = IS_BUDDY_LEFT_BLOCK_ABS(zone, frame); |
413 | is_right = IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame); |
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480 | bondari | 414 | |
564 | jermar | 415 | ASSERT(is_left ^ is_right); |
416 | |||
533 | bondari | 417 | if (is_left) { |
418 | index = (FRAME_INDEX(zone, frame)) + (1 << frame->buddy_order); |
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615 | palkovsky | 419 | } else { // if (is_right) |
533 | bondari | 420 | index = (FRAME_INDEX(zone, frame)) - (1 << frame->buddy_order); |
421 | } |
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422 | |||
423 | if (FRAME_INDEX_VALID(zone, index)) { |
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424 | if ( zone->frames[index].buddy_order == frame->buddy_order && |
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425 | zone->frames[index].refcount == 0) { |
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426 | return &zone->frames[index].buddy_link; |
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480 | bondari | 427 | } |
428 | } |
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429 | |||
539 | jermar | 430 | return NULL; |
479 | bondari | 431 | } |
432 | |||
433 | /** Buddy system bisect implementation |
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434 | * |
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489 | jermar | 435 | * @param b Buddy system. |
480 | bondari | 436 | * @param block Block to bisect |
437 | * |
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438 | * @return right block |
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479 | bondari | 439 | */ |
489 | jermar | 440 | link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block) { |
480 | bondari | 441 | frame_t * frame_l, * frame_r; |
564 | jermar | 442 | |
480 | bondari | 443 | frame_l = list_get_instance(block, frame_t, buddy_link); |
533 | bondari | 444 | frame_r = (frame_l + (1 << (frame_l->buddy_order - 1))); |
564 | jermar | 445 | |
480 | bondari | 446 | return &frame_r->buddy_link; |
479 | bondari | 447 | } |
448 | |||
449 | /** Buddy system coalesce implementation |
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450 | * |
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489 | jermar | 451 | * @param b Buddy system. |
480 | bondari | 452 | * @param block_1 First block |
453 | * @param block_2 First block's buddy |
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454 | * |
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455 | * @return Coalesced block (actually block that represents lower address) |
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479 | bondari | 456 | */ |
489 | jermar | 457 | link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * block_1, link_t * block_2) { |
480 | bondari | 458 | frame_t * frame1, * frame2; |
564 | jermar | 459 | |
480 | bondari | 460 | frame1 = list_get_instance(block_1, frame_t, buddy_link); |
461 | frame2 = list_get_instance(block_2, frame_t, buddy_link); |
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564 | jermar | 462 | |
533 | bondari | 463 | return frame1 < frame2 ? block_1 : block_2; |
479 | bondari | 464 | } |
465 | |||
466 | /** Buddy system set_order implementation |
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489 | jermar | 467 | * |
468 | * @param b Buddy system. |
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480 | bondari | 469 | * @param block Buddy system block |
470 | * @param order Order to set |
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479 | bondari | 471 | */ |
489 | jermar | 472 | void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order) { |
480 | bondari | 473 | frame_t * frame; |
474 | frame = list_get_instance(block, frame_t, buddy_link); |
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475 | frame->buddy_order = order; |
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479 | bondari | 476 | } |
477 | |||
478 | /** Buddy system get_order implementation |
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489 | jermar | 479 | * |
480 | * @param b Buddy system. |
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480 | bondari | 481 | * @param block Buddy system block |
479 | bondari | 482 | * |
480 | bondari | 483 | * @return Order of block |
479 | bondari | 484 | */ |
489 | jermar | 485 | __u8 zone_buddy_get_order(buddy_system_t *b, link_t * block) { |
480 | bondari | 486 | frame_t * frame; |
487 | frame = list_get_instance(block, frame_t, buddy_link); |
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488 | return frame->buddy_order; |
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479 | bondari | 489 | } |
533 | bondari | 490 | |
491 | /** Buddy system mark_busy implementation |
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492 | * |
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493 | * @param b Buddy system |
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494 | * @param block Buddy system block |
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495 | * |
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496 | */ |
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497 | void zone_buddy_mark_busy(buddy_system_t *b, link_t * block) { |
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498 | frame_t * frame; |
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499 | frame = list_get_instance(block, frame_t, buddy_link); |
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500 | frame->refcount = 1; |
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501 | } |
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676 | bondari | 502 | |
677 | bondari | 503 | /** Prints list of zones |
504 | * |
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505 | */ |
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676 | bondari | 506 | void zone_print_list(void) { |
507 | zone_t *zone = NULL; |
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508 | link_t *cur; |
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701 | jermar | 509 | ipl_t ipl; |
510 | |||
511 | ipl = interrupts_disable(); |
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683 | bondari | 512 | spinlock_lock(&zone_head_lock); |
686 | bondari | 513 | printf("Base address\tFree Frames\tBusy Frames\n"); |
514 | printf("------------\t-----------\t-----------\n"); |
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676 | bondari | 515 | for (cur = zone_head.next; cur != &zone_head; cur = cur->next) { |
516 | zone = list_get_instance(cur, zone_t, link); |
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683 | bondari | 517 | spinlock_lock(&zone->lock); |
686 | bondari | 518 | printf("%L\t%d\t\t%d\n",zone->base, zone->free_count, zone->busy_count); |
701 | jermar | 519 | spinlock_unlock(&zone->lock); |
676 | bondari | 520 | } |
683 | bondari | 521 | spinlock_unlock(&zone_head_lock); |
701 | jermar | 522 | interrupts_restore(ipl); |
676 | bondari | 523 | } |
524 | |||
677 | bondari | 525 | /** Prints zone details |
526 | * |
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683 | bondari | 527 | * @param base Zone base address |
677 | bondari | 528 | */ |
683 | bondari | 529 | void zone_print_one(__address base) { |
530 | zone_t *zone = NULL, *z ; |
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676 | bondari | 531 | link_t *cur; |
701 | jermar | 532 | ipl_t ipl; |
533 | |||
534 | ipl = interrupts_disable(); |
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683 | bondari | 535 | spinlock_lock(&zone_head_lock); |
536 | |||
676 | bondari | 537 | for (cur = zone_head.next; cur != &zone_head; cur = cur->next) { |
683 | bondari | 538 | z = list_get_instance(cur, zone_t, link); |
539 | if (base == z->base) { |
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540 | zone = z; |
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676 | bondari | 541 | break; |
542 | } |
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543 | } |
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544 | |||
545 | if (!zone) { |
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701 | jermar | 546 | spinlock_unlock(&zone_head_lock); |
547 | interrupts_restore(ipl); |
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683 | bondari | 548 | printf("No zone with address %X\n", base); |
676 | bondari | 549 | return; |
550 | } |
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551 | |||
683 | bondari | 552 | spinlock_lock(&zone->lock); |
553 | printf("Memory zone information\n\n"); |
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676 | bondari | 554 | printf("Zone base address: %P\n", zone->base); |
701 | jermar | 555 | printf("Zone size: %d frames (%dK)\n", zone->free_count + zone->busy_count, ((zone->free_count + zone->busy_count) * FRAME_SIZE) >> 10); |
556 | printf("Allocated space: %d frames (%dK)\n", zone->busy_count, (zone->busy_count * FRAME_SIZE) >> 10); |
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557 | printf("Available space: %d (%dK)\n", zone->free_count, (zone->free_count * FRAME_SIZE) >> 10); |
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683 | bondari | 558 | |
559 | printf("\nBuddy allocator structures:\n\n"); |
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686 | bondari | 560 | buddy_system_structure_print(zone->buddy_system, FRAME_SIZE); |
683 | bondari | 561 | |
562 | spinlock_unlock(&zone->lock); |
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563 | spinlock_unlock(&zone_head_lock); |
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701 | jermar | 564 | interrupts_restore(ipl); |
676 | bondari | 565 | } |
566 |