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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 | |||
735 | bondari | 155 | ASSERT(v == ALIGN_UP(v, FRAME_SIZE << order)); |
156 | |||
368 | jermar | 157 | if (flags & FRAME_KA) |
158 | v = PA2KA(v); |
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159 | |||
689 | bondari | 160 | if (flags & FRAME_NON_BLOCKING) { |
161 | ASSERT(status != NULL); |
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162 | *status = FRAME_OK; |
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163 | } |
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368 | jermar | 164 | return v; |
1 | jermar | 165 | } |
166 | |||
368 | jermar | 167 | /** Free a frame. |
168 | * |
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169 | * Find respective frame structrue for supplied addr. |
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170 | * Decrement frame reference count. |
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171 | * If it drops to zero, move the frame structure to free list. |
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172 | * |
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173 | * @param addr Address of the frame to be freed. It must be a multiple of FRAME_SIZE. |
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1 | jermar | 174 | */ |
175 | void frame_free(__address addr) |
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176 | { |
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413 | jermar | 177 | ipl_t ipl; |
368 | jermar | 178 | link_t *cur; |
179 | zone_t *z; |
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180 | zone_t *zone = NULL; |
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181 | frame_t *frame; |
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724 | palkovsky | 182 | int order; |
183 | |||
368 | jermar | 184 | ASSERT(addr % FRAME_SIZE == 0); |
1 | jermar | 185 | |
413 | jermar | 186 | ipl = interrupts_disable(); |
368 | jermar | 187 | spinlock_lock(&zone_head_lock); |
1 | jermar | 188 | |
368 | jermar | 189 | /* |
190 | * First, find host frame zone for addr. |
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191 | */ |
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192 | for (cur = zone_head.next; cur != &zone_head; cur = cur->next) { |
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193 | z = list_get_instance(cur, zone_t, link); |
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194 | |||
195 | spinlock_lock(&z->lock); |
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196 | |||
197 | if (IS_KA(addr)) |
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198 | addr = KA2PA(addr); |
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199 | |||
200 | /* |
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201 | * Check if addr belongs to z. |
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202 | */ |
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203 | if ((addr >= z->base) && (addr <= z->base + (z->free_count + z->busy_count) * FRAME_SIZE)) { |
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204 | zone = z; |
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205 | break; |
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1 | jermar | 206 | } |
701 | jermar | 207 | |
368 | jermar | 208 | spinlock_unlock(&z->lock); |
1 | jermar | 209 | } |
210 | |||
368 | jermar | 211 | ASSERT(zone != NULL); |
212 | |||
479 | bondari | 213 | frame = ADDR2FRAME(zone, addr); |
724 | palkovsky | 214 | |
215 | /* remember frame order */ |
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216 | order = frame->buddy_order; |
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533 | bondari | 217 | |
368 | jermar | 218 | ASSERT(frame->refcount); |
219 | |||
220 | if (!--frame->refcount) { |
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533 | bondari | 221 | buddy_system_free(zone->buddy_system, &frame->buddy_link); |
368 | jermar | 222 | } |
539 | jermar | 223 | |
224 | /* Update zone information. */ |
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724 | palkovsky | 225 | zone->free_count += (1 << order); |
226 | zone->busy_count -= (1 << order); |
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368 | jermar | 227 | |
539 | jermar | 228 | spinlock_unlock(&zone->lock); |
368 | jermar | 229 | spinlock_unlock(&zone_head_lock); |
413 | jermar | 230 | interrupts_restore(ipl); |
1 | jermar | 231 | } |
232 | |||
368 | jermar | 233 | /** Mark frame region not free. |
234 | * |
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235 | * Mark frame region not free. |
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236 | * |
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537 | jermar | 237 | * @param base Base address of non-available region. |
238 | * @param size Size of non-available region. |
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368 | jermar | 239 | */ |
533 | bondari | 240 | void frame_region_not_free(__address base, size_t size) |
1 | jermar | 241 | { |
537 | jermar | 242 | index_t index; |
533 | bondari | 243 | index = zone_blacklist_count++; |
537 | jermar | 244 | |
245 | /* Force base to the nearest lower address frame boundary. */ |
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564 | jermar | 246 | base = ALIGN_DOWN(base, FRAME_SIZE); |
537 | jermar | 247 | /* Align size to frame boundary. */ |
564 | jermar | 248 | size = ALIGN_UP(size, FRAME_SIZE); |
537 | jermar | 249 | |
564 | jermar | 250 | ASSERT(index < ZONE_BLACKLIST_SIZE); |
533 | bondari | 251 | zone_blacklist[index].base = base; |
252 | zone_blacklist[index].size = size; |
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1 | jermar | 253 | } |
367 | jermar | 254 | |
539 | jermar | 255 | /** Create frame zones in region of available memory. |
256 | * |
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257 | * Avoid any black listed areas of non-available memory. |
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258 | * Assume that the black listed areas cannot overlap |
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259 | * one another or cross available memory region boundaries. |
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260 | * |
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261 | * @param base Base address of available memory region. |
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262 | * @param size Size of the region. |
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263 | */ |
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533 | bondari | 264 | void zone_create_in_region(__address base, size_t size) { |
265 | int i; |
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266 | zone_t * z; |
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537 | jermar | 267 | __address s; |
268 | size_t sz; |
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533 | bondari | 269 | |
270 | ASSERT(base % FRAME_SIZE == 0); |
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271 | ASSERT(size % FRAME_SIZE == 0); |
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272 | |||
537 | jermar | 273 | if (!size) |
274 | return; |
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275 | |||
533 | bondari | 276 | for (i = 0; i < zone_blacklist_count; i++) { |
277 | if (zone_blacklist[i].base >= base && zone_blacklist[i].base < base + size) { |
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278 | s = base; sz = zone_blacklist[i].base - base; |
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279 | ASSERT(base != s || sz != size); |
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280 | zone_create_in_region(s, sz); |
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281 | |||
282 | s = zone_blacklist[i].base + zone_blacklist[i].size; |
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283 | sz = (base + size) - (zone_blacklist[i].base + zone_blacklist[i].size); |
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284 | ASSERT(base != s || sz != size); |
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285 | zone_create_in_region(s, sz); |
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286 | return; |
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287 | |||
288 | } |
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289 | } |
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290 | |||
291 | z = zone_create(base, size, 0); |
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292 | |||
293 | if (!z) { |
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564 | jermar | 294 | panic("Cannot allocate zone (base=%P, size=%d).\n", base, size); |
533 | bondari | 295 | } |
296 | |||
297 | zone_attach(z); |
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298 | } |
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299 | |||
300 | |||
367 | jermar | 301 | /** Create frame zone |
302 | * |
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303 | * Create new frame zone. |
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304 | * |
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305 | * @param start Physical address of the first frame within the zone. |
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306 | * @param size Size of the zone. Must be a multiple of FRAME_SIZE. |
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307 | * @param flags Zone flags. |
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308 | * |
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309 | * @return Initialized zone. |
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310 | */ |
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533 | bondari | 311 | zone_t * zone_create(__address start, size_t size, int flags) |
367 | jermar | 312 | { |
313 | zone_t *z; |
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314 | count_t cnt; |
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315 | int i; |
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479 | bondari | 316 | __u8 max_order; |
533 | bondari | 317 | |
367 | jermar | 318 | ASSERT(start % FRAME_SIZE == 0); |
319 | ASSERT(size % FRAME_SIZE == 0); |
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320 | |||
321 | cnt = size / FRAME_SIZE; |
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322 | |||
374 | jermar | 323 | z = (zone_t *) early_malloc(sizeof(zone_t)); |
367 | jermar | 324 | if (z) { |
325 | link_initialize(&z->link); |
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552 | palkovsky | 326 | spinlock_initialize(&z->lock, "zone_lock"); |
367 | jermar | 327 | |
328 | z->base = start; |
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724 | palkovsky | 329 | z->base_index = start / FRAME_SIZE; |
330 | |||
367 | jermar | 331 | z->flags = flags; |
332 | |||
333 | z->free_count = cnt; |
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334 | z->busy_count = 0; |
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335 | |||
374 | jermar | 336 | z->frames = (frame_t *) early_malloc(cnt * sizeof(frame_t)); |
367 | jermar | 337 | if (!z->frames) { |
375 | jermar | 338 | early_free(z); |
367 | jermar | 339 | return NULL; |
340 | } |
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341 | |||
342 | for (i = 0; i<cnt; i++) { |
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343 | frame_initialize(&z->frames[i], z); |
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344 | } |
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345 | |||
479 | bondari | 346 | /* |
347 | * Create buddy system for the zone |
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348 | */ |
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537 | jermar | 349 | for (max_order = 0; cnt >> max_order; max_order++) |
350 | ; |
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489 | jermar | 351 | z->buddy_system = buddy_system_create(max_order, &zone_buddy_system_operations, (void *) z); |
533 | bondari | 352 | |
353 | /* Stuffing frames */ |
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354 | for (i = 0; i<cnt; i++) { |
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355 | z->frames[i].refcount = 0; |
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356 | buddy_system_free(z->buddy_system, &z->frames[i].buddy_link); |
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357 | } |
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724 | palkovsky | 358 | |
367 | jermar | 359 | } |
360 | return z; |
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361 | } |
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362 | |||
363 | /** Attach frame zone |
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364 | * |
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365 | * Attach frame zone to zone list. |
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366 | * |
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367 | * @param zone Zone to be attached. |
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368 | */ |
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369 | void zone_attach(zone_t *zone) |
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370 | { |
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413 | jermar | 371 | ipl_t ipl; |
367 | jermar | 372 | |
413 | jermar | 373 | ipl = interrupts_disable(); |
367 | jermar | 374 | spinlock_lock(&zone_head_lock); |
375 | |||
376 | list_append(&zone->link, &zone_head); |
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377 | |||
378 | spinlock_unlock(&zone_head_lock); |
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413 | jermar | 379 | interrupts_restore(ipl); |
367 | jermar | 380 | } |
381 | |||
382 | /** Initialize frame structure |
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383 | * |
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384 | * Initialize frame structure. |
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385 | * |
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386 | * @param frame Frame structure to be initialized. |
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387 | * @param zone Host frame zone. |
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388 | */ |
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389 | void frame_initialize(frame_t *frame, zone_t *zone) |
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390 | { |
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533 | bondari | 391 | frame->refcount = 1; |
392 | frame->buddy_order = 0; |
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367 | jermar | 393 | } |
479 | bondari | 394 | |
395 | |||
396 | /** Buddy system find_buddy implementation |
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489 | jermar | 397 | * |
398 | * @param b Buddy system. |
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480 | bondari | 399 | * @param block Block for which buddy should be found |
479 | bondari | 400 | * |
480 | bondari | 401 | * @return Buddy for given block if found |
479 | bondari | 402 | */ |
489 | jermar | 403 | link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * block) { |
539 | jermar | 404 | frame_t * frame; |
480 | bondari | 405 | zone_t * zone; |
564 | jermar | 406 | index_t index; |
480 | bondari | 407 | bool is_left, is_right; |
479 | bondari | 408 | |
480 | bondari | 409 | frame = list_get_instance(block, frame_t, buddy_link); |
533 | bondari | 410 | zone = (zone_t *) b->data; |
724 | palkovsky | 411 | ASSERT(IS_BUDDY_ORDER_OK(FRAME_INDEX_ABS(zone, frame), frame->buddy_order)); |
480 | bondari | 412 | |
564 | jermar | 413 | |
724 | palkovsky | 414 | is_left = IS_BUDDY_LEFT_BLOCK_ABS(zone, frame); |
415 | is_right = IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame); |
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480 | bondari | 416 | |
564 | jermar | 417 | ASSERT(is_left ^ is_right); |
418 | |||
533 | bondari | 419 | if (is_left) { |
420 | index = (FRAME_INDEX(zone, frame)) + (1 << frame->buddy_order); |
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615 | palkovsky | 421 | } else { // if (is_right) |
533 | bondari | 422 | index = (FRAME_INDEX(zone, frame)) - (1 << frame->buddy_order); |
423 | } |
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424 | |||
425 | if (FRAME_INDEX_VALID(zone, index)) { |
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426 | if ( zone->frames[index].buddy_order == frame->buddy_order && |
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427 | zone->frames[index].refcount == 0) { |
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428 | return &zone->frames[index].buddy_link; |
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480 | bondari | 429 | } |
430 | } |
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431 | |||
539 | jermar | 432 | return NULL; |
479 | bondari | 433 | } |
434 | |||
435 | /** Buddy system bisect implementation |
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436 | * |
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489 | jermar | 437 | * @param b Buddy system. |
480 | bondari | 438 | * @param block Block to bisect |
439 | * |
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440 | * @return right block |
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479 | bondari | 441 | */ |
489 | jermar | 442 | link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block) { |
480 | bondari | 443 | frame_t * frame_l, * frame_r; |
564 | jermar | 444 | |
480 | bondari | 445 | frame_l = list_get_instance(block, frame_t, buddy_link); |
533 | bondari | 446 | frame_r = (frame_l + (1 << (frame_l->buddy_order - 1))); |
564 | jermar | 447 | |
480 | bondari | 448 | return &frame_r->buddy_link; |
479 | bondari | 449 | } |
450 | |||
451 | /** Buddy system coalesce implementation |
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452 | * |
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489 | jermar | 453 | * @param b Buddy system. |
480 | bondari | 454 | * @param block_1 First block |
455 | * @param block_2 First block's buddy |
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456 | * |
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457 | * @return Coalesced block (actually block that represents lower address) |
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479 | bondari | 458 | */ |
489 | jermar | 459 | link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * block_1, link_t * block_2) { |
480 | bondari | 460 | frame_t * frame1, * frame2; |
564 | jermar | 461 | |
480 | bondari | 462 | frame1 = list_get_instance(block_1, frame_t, buddy_link); |
463 | frame2 = list_get_instance(block_2, frame_t, buddy_link); |
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564 | jermar | 464 | |
533 | bondari | 465 | return frame1 < frame2 ? block_1 : block_2; |
479 | bondari | 466 | } |
467 | |||
468 | /** Buddy system set_order implementation |
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489 | jermar | 469 | * |
470 | * @param b Buddy system. |
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480 | bondari | 471 | * @param block Buddy system block |
472 | * @param order Order to set |
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479 | bondari | 473 | */ |
489 | jermar | 474 | void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order) { |
480 | bondari | 475 | frame_t * frame; |
476 | frame = list_get_instance(block, frame_t, buddy_link); |
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477 | frame->buddy_order = order; |
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479 | bondari | 478 | } |
479 | |||
480 | /** Buddy system get_order implementation |
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489 | jermar | 481 | * |
482 | * @param b Buddy system. |
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480 | bondari | 483 | * @param block Buddy system block |
479 | bondari | 484 | * |
480 | bondari | 485 | * @return Order of block |
479 | bondari | 486 | */ |
489 | jermar | 487 | __u8 zone_buddy_get_order(buddy_system_t *b, link_t * block) { |
480 | bondari | 488 | frame_t * frame; |
489 | frame = list_get_instance(block, frame_t, buddy_link); |
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490 | return frame->buddy_order; |
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479 | bondari | 491 | } |
533 | bondari | 492 | |
493 | /** Buddy system mark_busy implementation |
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494 | * |
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495 | * @param b Buddy system |
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496 | * @param block Buddy system block |
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497 | * |
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498 | */ |
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499 | void zone_buddy_mark_busy(buddy_system_t *b, link_t * block) { |
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500 | frame_t * frame; |
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501 | frame = list_get_instance(block, frame_t, buddy_link); |
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502 | frame->refcount = 1; |
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503 | } |
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676 | bondari | 504 | |
677 | bondari | 505 | /** Prints list of zones |
506 | * |
||
507 | */ |
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676 | bondari | 508 | void zone_print_list(void) { |
509 | zone_t *zone = NULL; |
||
510 | link_t *cur; |
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701 | jermar | 511 | ipl_t ipl; |
512 | |||
513 | ipl = interrupts_disable(); |
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683 | bondari | 514 | spinlock_lock(&zone_head_lock); |
686 | bondari | 515 | printf("Base address\tFree Frames\tBusy Frames\n"); |
516 | printf("------------\t-----------\t-----------\n"); |
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676 | bondari | 517 | for (cur = zone_head.next; cur != &zone_head; cur = cur->next) { |
518 | zone = list_get_instance(cur, zone_t, link); |
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683 | bondari | 519 | spinlock_lock(&zone->lock); |
686 | bondari | 520 | printf("%L\t%d\t\t%d\n",zone->base, zone->free_count, zone->busy_count); |
701 | jermar | 521 | spinlock_unlock(&zone->lock); |
676 | bondari | 522 | } |
683 | bondari | 523 | spinlock_unlock(&zone_head_lock); |
701 | jermar | 524 | interrupts_restore(ipl); |
676 | bondari | 525 | } |
526 | |||
677 | bondari | 527 | /** Prints zone details |
528 | * |
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683 | bondari | 529 | * @param base Zone base address |
677 | bondari | 530 | */ |
683 | bondari | 531 | void zone_print_one(__address base) { |
532 | zone_t *zone = NULL, *z ; |
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676 | bondari | 533 | link_t *cur; |
701 | jermar | 534 | ipl_t ipl; |
535 | |||
536 | ipl = interrupts_disable(); |
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683 | bondari | 537 | spinlock_lock(&zone_head_lock); |
538 | |||
676 | bondari | 539 | for (cur = zone_head.next; cur != &zone_head; cur = cur->next) { |
683 | bondari | 540 | z = list_get_instance(cur, zone_t, link); |
541 | if (base == z->base) { |
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542 | zone = z; |
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676 | bondari | 543 | break; |
544 | } |
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545 | } |
||
546 | |||
547 | if (!zone) { |
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701 | jermar | 548 | spinlock_unlock(&zone_head_lock); |
549 | interrupts_restore(ipl); |
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683 | bondari | 550 | printf("No zone with address %X\n", base); |
676 | bondari | 551 | return; |
552 | } |
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553 | |||
683 | bondari | 554 | spinlock_lock(&zone->lock); |
555 | printf("Memory zone information\n\n"); |
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676 | bondari | 556 | printf("Zone base address: %P\n", zone->base); |
701 | jermar | 557 | printf("Zone size: %d frames (%dK)\n", zone->free_count + zone->busy_count, ((zone->free_count + zone->busy_count) * FRAME_SIZE) >> 10); |
558 | printf("Allocated space: %d frames (%dK)\n", zone->busy_count, (zone->busy_count * FRAME_SIZE) >> 10); |
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559 | printf("Available space: %d (%dK)\n", zone->free_count, (zone->free_count * FRAME_SIZE) >> 10); |
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683 | bondari | 560 | |
561 | printf("\nBuddy allocator structures:\n\n"); |
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686 | bondari | 562 | buddy_system_structure_print(zone->buddy_system, FRAME_SIZE); |
683 | bondari | 563 | |
564 | spinlock_unlock(&zone->lock); |
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565 | spinlock_unlock(&zone_head_lock); |
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701 | jermar | 566 | interrupts_restore(ipl); |
676 | bondari | 567 | } |
568 |