Commit | Line | Data |
---|---|---|
95f72d1e YL |
1 | /* |
2 | * Procedures for maintaining information about logical memory blocks. | |
3 | * | |
4 | * Peter Bergner, IBM Corp. June 2001. | |
5 | * Copyright (C) 2001 Peter Bergner. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
142b45a7 | 14 | #include <linux/slab.h> |
95f72d1e YL |
15 | #include <linux/init.h> |
16 | #include <linux/bitops.h> | |
449e8df3 | 17 | #include <linux/poison.h> |
c196f76f | 18 | #include <linux/pfn.h> |
6d03b885 BH |
19 | #include <linux/debugfs.h> |
20 | #include <linux/seq_file.h> | |
95f72d1e YL |
21 | #include <linux/memblock.h> |
22 | ||
79442ed1 | 23 | #include <asm-generic/sections.h> |
26f09e9b SS |
24 | #include <linux/io.h> |
25 | ||
26 | #include "internal.h" | |
79442ed1 | 27 | |
fe091c20 TH |
28 | static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; |
29 | static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; | |
70210ed9 PH |
30 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
31 | static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS] __initdata_memblock; | |
32 | #endif | |
fe091c20 TH |
33 | |
34 | struct memblock memblock __initdata_memblock = { | |
35 | .memory.regions = memblock_memory_init_regions, | |
36 | .memory.cnt = 1, /* empty dummy entry */ | |
37 | .memory.max = INIT_MEMBLOCK_REGIONS, | |
38 | ||
39 | .reserved.regions = memblock_reserved_init_regions, | |
40 | .reserved.cnt = 1, /* empty dummy entry */ | |
41 | .reserved.max = INIT_MEMBLOCK_REGIONS, | |
42 | ||
70210ed9 PH |
43 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
44 | .physmem.regions = memblock_physmem_init_regions, | |
45 | .physmem.cnt = 1, /* empty dummy entry */ | |
46 | .physmem.max = INIT_PHYSMEM_REGIONS, | |
47 | #endif | |
48 | ||
79442ed1 | 49 | .bottom_up = false, |
fe091c20 TH |
50 | .current_limit = MEMBLOCK_ALLOC_ANYWHERE, |
51 | }; | |
95f72d1e | 52 | |
10d06439 | 53 | int memblock_debug __initdata_memblock; |
55ac590c TC |
54 | #ifdef CONFIG_MOVABLE_NODE |
55 | bool movable_node_enabled __initdata_memblock = false; | |
56 | #endif | |
a3f5bafc | 57 | static bool system_has_some_mirror __initdata_memblock = false; |
1aadc056 | 58 | static int memblock_can_resize __initdata_memblock; |
181eb394 GS |
59 | static int memblock_memory_in_slab __initdata_memblock = 0; |
60 | static int memblock_reserved_in_slab __initdata_memblock = 0; | |
95f72d1e | 61 | |
a3f5bafc TL |
62 | ulong __init_memblock choose_memblock_flags(void) |
63 | { | |
64 | return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; | |
65 | } | |
66 | ||
142b45a7 | 67 | /* inline so we don't get a warning when pr_debug is compiled out */ |
c2233116 RP |
68 | static __init_memblock const char * |
69 | memblock_type_name(struct memblock_type *type) | |
142b45a7 BH |
70 | { |
71 | if (type == &memblock.memory) | |
72 | return "memory"; | |
73 | else if (type == &memblock.reserved) | |
74 | return "reserved"; | |
75 | else | |
76 | return "unknown"; | |
77 | } | |
78 | ||
eb18f1b5 TH |
79 | /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ |
80 | static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) | |
81 | { | |
82 | return *size = min(*size, (phys_addr_t)ULLONG_MAX - base); | |
83 | } | |
84 | ||
6ed311b2 BH |
85 | /* |
86 | * Address comparison utilities | |
87 | */ | |
10d06439 | 88 | static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, |
2898cc4c | 89 | phys_addr_t base2, phys_addr_t size2) |
95f72d1e YL |
90 | { |
91 | return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); | |
92 | } | |
93 | ||
95cf82ec | 94 | bool __init_memblock memblock_overlaps_region(struct memblock_type *type, |
2d7d3eb2 | 95 | phys_addr_t base, phys_addr_t size) |
6ed311b2 BH |
96 | { |
97 | unsigned long i; | |
98 | ||
f14516fb AK |
99 | for (i = 0; i < type->cnt; i++) |
100 | if (memblock_addrs_overlap(base, size, type->regions[i].base, | |
101 | type->regions[i].size)) | |
6ed311b2 | 102 | break; |
c5c5c9d1 | 103 | return i < type->cnt; |
6ed311b2 BH |
104 | } |
105 | ||
79442ed1 TC |
106 | /* |
107 | * __memblock_find_range_bottom_up - find free area utility in bottom-up | |
108 | * @start: start of candidate range | |
109 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} | |
110 | * @size: size of free area to find | |
111 | * @align: alignment of free area to find | |
b1154233 | 112 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
fc6daaf9 | 113 | * @flags: pick from blocks based on memory attributes |
79442ed1 TC |
114 | * |
115 | * Utility called from memblock_find_in_range_node(), find free area bottom-up. | |
116 | * | |
117 | * RETURNS: | |
118 | * Found address on success, 0 on failure. | |
119 | */ | |
120 | static phys_addr_t __init_memblock | |
121 | __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, | |
fc6daaf9 TL |
122 | phys_addr_t size, phys_addr_t align, int nid, |
123 | ulong flags) | |
79442ed1 TC |
124 | { |
125 | phys_addr_t this_start, this_end, cand; | |
126 | u64 i; | |
127 | ||
fc6daaf9 | 128 | for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { |
79442ed1 TC |
129 | this_start = clamp(this_start, start, end); |
130 | this_end = clamp(this_end, start, end); | |
131 | ||
132 | cand = round_up(this_start, align); | |
133 | if (cand < this_end && this_end - cand >= size) | |
134 | return cand; | |
135 | } | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
7bd0b0f0 | 140 | /** |
1402899e | 141 | * __memblock_find_range_top_down - find free area utility, in top-down |
7bd0b0f0 TH |
142 | * @start: start of candidate range |
143 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} | |
144 | * @size: size of free area to find | |
145 | * @align: alignment of free area to find | |
b1154233 | 146 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
fc6daaf9 | 147 | * @flags: pick from blocks based on memory attributes |
7bd0b0f0 | 148 | * |
1402899e | 149 | * Utility called from memblock_find_in_range_node(), find free area top-down. |
7bd0b0f0 TH |
150 | * |
151 | * RETURNS: | |
79442ed1 | 152 | * Found address on success, 0 on failure. |
6ed311b2 | 153 | */ |
1402899e TC |
154 | static phys_addr_t __init_memblock |
155 | __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, | |
fc6daaf9 TL |
156 | phys_addr_t size, phys_addr_t align, int nid, |
157 | ulong flags) | |
f7210e6c TC |
158 | { |
159 | phys_addr_t this_start, this_end, cand; | |
160 | u64 i; | |
161 | ||
fc6daaf9 TL |
162 | for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, |
163 | NULL) { | |
f7210e6c TC |
164 | this_start = clamp(this_start, start, end); |
165 | this_end = clamp(this_end, start, end); | |
166 | ||
167 | if (this_end < size) | |
168 | continue; | |
169 | ||
170 | cand = round_down(this_end - size, align); | |
171 | if (cand >= this_start) | |
172 | return cand; | |
173 | } | |
1402899e | 174 | |
f7210e6c TC |
175 | return 0; |
176 | } | |
6ed311b2 | 177 | |
1402899e TC |
178 | /** |
179 | * memblock_find_in_range_node - find free area in given range and node | |
1402899e TC |
180 | * @size: size of free area to find |
181 | * @align: alignment of free area to find | |
87029ee9 GS |
182 | * @start: start of candidate range |
183 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} | |
b1154233 | 184 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
fc6daaf9 | 185 | * @flags: pick from blocks based on memory attributes |
1402899e TC |
186 | * |
187 | * Find @size free area aligned to @align in the specified range and node. | |
188 | * | |
79442ed1 TC |
189 | * When allocation direction is bottom-up, the @start should be greater |
190 | * than the end of the kernel image. Otherwise, it will be trimmed. The | |
191 | * reason is that we want the bottom-up allocation just near the kernel | |
192 | * image so it is highly likely that the allocated memory and the kernel | |
193 | * will reside in the same node. | |
194 | * | |
195 | * If bottom-up allocation failed, will try to allocate memory top-down. | |
196 | * | |
1402899e | 197 | * RETURNS: |
79442ed1 | 198 | * Found address on success, 0 on failure. |
1402899e | 199 | */ |
87029ee9 GS |
200 | phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, |
201 | phys_addr_t align, phys_addr_t start, | |
fc6daaf9 | 202 | phys_addr_t end, int nid, ulong flags) |
1402899e | 203 | { |
0cfb8f0c | 204 | phys_addr_t kernel_end, ret; |
79442ed1 | 205 | |
1402899e TC |
206 | /* pump up @end */ |
207 | if (end == MEMBLOCK_ALLOC_ACCESSIBLE) | |
208 | end = memblock.current_limit; | |
209 | ||
210 | /* avoid allocating the first page */ | |
211 | start = max_t(phys_addr_t, start, PAGE_SIZE); | |
212 | end = max(start, end); | |
79442ed1 TC |
213 | kernel_end = __pa_symbol(_end); |
214 | ||
215 | /* | |
216 | * try bottom-up allocation only when bottom-up mode | |
217 | * is set and @end is above the kernel image. | |
218 | */ | |
219 | if (memblock_bottom_up() && end > kernel_end) { | |
220 | phys_addr_t bottom_up_start; | |
221 | ||
222 | /* make sure we will allocate above the kernel */ | |
223 | bottom_up_start = max(start, kernel_end); | |
224 | ||
225 | /* ok, try bottom-up allocation first */ | |
226 | ret = __memblock_find_range_bottom_up(bottom_up_start, end, | |
fc6daaf9 | 227 | size, align, nid, flags); |
79442ed1 TC |
228 | if (ret) |
229 | return ret; | |
230 | ||
231 | /* | |
232 | * we always limit bottom-up allocation above the kernel, | |
233 | * but top-down allocation doesn't have the limit, so | |
234 | * retrying top-down allocation may succeed when bottom-up | |
235 | * allocation failed. | |
236 | * | |
237 | * bottom-up allocation is expected to be fail very rarely, | |
238 | * so we use WARN_ONCE() here to see the stack trace if | |
239 | * fail happens. | |
240 | */ | |
241 | WARN_ONCE(1, "memblock: bottom-up allocation failed, " | |
242 | "memory hotunplug may be affected\n"); | |
243 | } | |
1402899e | 244 | |
fc6daaf9 TL |
245 | return __memblock_find_range_top_down(start, end, size, align, nid, |
246 | flags); | |
1402899e TC |
247 | } |
248 | ||
7bd0b0f0 TH |
249 | /** |
250 | * memblock_find_in_range - find free area in given range | |
251 | * @start: start of candidate range | |
252 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} | |
253 | * @size: size of free area to find | |
254 | * @align: alignment of free area to find | |
255 | * | |
256 | * Find @size free area aligned to @align in the specified range. | |
257 | * | |
258 | * RETURNS: | |
79442ed1 | 259 | * Found address on success, 0 on failure. |
fc769a8e | 260 | */ |
7bd0b0f0 TH |
261 | phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, |
262 | phys_addr_t end, phys_addr_t size, | |
263 | phys_addr_t align) | |
6ed311b2 | 264 | { |
a3f5bafc TL |
265 | phys_addr_t ret; |
266 | ulong flags = choose_memblock_flags(); | |
267 | ||
268 | again: | |
269 | ret = memblock_find_in_range_node(size, align, start, end, | |
270 | NUMA_NO_NODE, flags); | |
271 | ||
272 | if (!ret && (flags & MEMBLOCK_MIRROR)) { | |
273 | pr_warn("Could not allocate %pap bytes of mirrored memory\n", | |
274 | &size); | |
275 | flags &= ~MEMBLOCK_MIRROR; | |
276 | goto again; | |
277 | } | |
278 | ||
279 | return ret; | |
6ed311b2 BH |
280 | } |
281 | ||
10d06439 | 282 | static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) |
95f72d1e | 283 | { |
1440c4e2 | 284 | type->total_size -= type->regions[r].size; |
7c0caeb8 TH |
285 | memmove(&type->regions[r], &type->regions[r + 1], |
286 | (type->cnt - (r + 1)) * sizeof(type->regions[r])); | |
e3239ff9 | 287 | type->cnt--; |
95f72d1e | 288 | |
8f7a6605 BH |
289 | /* Special case for empty arrays */ |
290 | if (type->cnt == 0) { | |
1440c4e2 | 291 | WARN_ON(type->total_size != 0); |
8f7a6605 BH |
292 | type->cnt = 1; |
293 | type->regions[0].base = 0; | |
294 | type->regions[0].size = 0; | |
66a20757 | 295 | type->regions[0].flags = 0; |
7c0caeb8 | 296 | memblock_set_region_node(&type->regions[0], MAX_NUMNODES); |
8f7a6605 | 297 | } |
95f72d1e YL |
298 | } |
299 | ||
354f17e1 PH |
300 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
301 | ||
29f67386 YL |
302 | phys_addr_t __init_memblock get_allocated_memblock_reserved_regions_info( |
303 | phys_addr_t *addr) | |
304 | { | |
305 | if (memblock.reserved.regions == memblock_reserved_init_regions) | |
306 | return 0; | |
307 | ||
308 | *addr = __pa(memblock.reserved.regions); | |
309 | ||
310 | return PAGE_ALIGN(sizeof(struct memblock_region) * | |
311 | memblock.reserved.max); | |
312 | } | |
313 | ||
5e270e25 PH |
314 | phys_addr_t __init_memblock get_allocated_memblock_memory_regions_info( |
315 | phys_addr_t *addr) | |
316 | { | |
317 | if (memblock.memory.regions == memblock_memory_init_regions) | |
318 | return 0; | |
319 | ||
320 | *addr = __pa(memblock.memory.regions); | |
321 | ||
322 | return PAGE_ALIGN(sizeof(struct memblock_region) * | |
323 | memblock.memory.max); | |
324 | } | |
325 | ||
326 | #endif | |
327 | ||
48c3b583 GP |
328 | /** |
329 | * memblock_double_array - double the size of the memblock regions array | |
330 | * @type: memblock type of the regions array being doubled | |
331 | * @new_area_start: starting address of memory range to avoid overlap with | |
332 | * @new_area_size: size of memory range to avoid overlap with | |
333 | * | |
334 | * Double the size of the @type regions array. If memblock is being used to | |
335 | * allocate memory for a new reserved regions array and there is a previously | |
336 | * allocated memory range [@new_area_start,@new_area_start+@new_area_size] | |
337 | * waiting to be reserved, ensure the memory used by the new array does | |
338 | * not overlap. | |
339 | * | |
340 | * RETURNS: | |
341 | * 0 on success, -1 on failure. | |
342 | */ | |
343 | static int __init_memblock memblock_double_array(struct memblock_type *type, | |
344 | phys_addr_t new_area_start, | |
345 | phys_addr_t new_area_size) | |
142b45a7 BH |
346 | { |
347 | struct memblock_region *new_array, *old_array; | |
29f67386 | 348 | phys_addr_t old_alloc_size, new_alloc_size; |
142b45a7 BH |
349 | phys_addr_t old_size, new_size, addr; |
350 | int use_slab = slab_is_available(); | |
181eb394 | 351 | int *in_slab; |
142b45a7 BH |
352 | |
353 | /* We don't allow resizing until we know about the reserved regions | |
354 | * of memory that aren't suitable for allocation | |
355 | */ | |
356 | if (!memblock_can_resize) | |
357 | return -1; | |
358 | ||
142b45a7 BH |
359 | /* Calculate new doubled size */ |
360 | old_size = type->max * sizeof(struct memblock_region); | |
361 | new_size = old_size << 1; | |
29f67386 YL |
362 | /* |
363 | * We need to allocated new one align to PAGE_SIZE, | |
364 | * so we can free them completely later. | |
365 | */ | |
366 | old_alloc_size = PAGE_ALIGN(old_size); | |
367 | new_alloc_size = PAGE_ALIGN(new_size); | |
142b45a7 | 368 | |
181eb394 GS |
369 | /* Retrieve the slab flag */ |
370 | if (type == &memblock.memory) | |
371 | in_slab = &memblock_memory_in_slab; | |
372 | else | |
373 | in_slab = &memblock_reserved_in_slab; | |
374 | ||
142b45a7 BH |
375 | /* Try to find some space for it. |
376 | * | |
377 | * WARNING: We assume that either slab_is_available() and we use it or | |
fd07383b AM |
378 | * we use MEMBLOCK for allocations. That means that this is unsafe to |
379 | * use when bootmem is currently active (unless bootmem itself is | |
380 | * implemented on top of MEMBLOCK which isn't the case yet) | |
142b45a7 BH |
381 | * |
382 | * This should however not be an issue for now, as we currently only | |
fd07383b AM |
383 | * call into MEMBLOCK while it's still active, or much later when slab |
384 | * is active for memory hotplug operations | |
142b45a7 BH |
385 | */ |
386 | if (use_slab) { | |
387 | new_array = kmalloc(new_size, GFP_KERNEL); | |
1f5026a7 | 388 | addr = new_array ? __pa(new_array) : 0; |
4e2f0775 | 389 | } else { |
48c3b583 GP |
390 | /* only exclude range when trying to double reserved.regions */ |
391 | if (type != &memblock.reserved) | |
392 | new_area_start = new_area_size = 0; | |
393 | ||
394 | addr = memblock_find_in_range(new_area_start + new_area_size, | |
395 | memblock.current_limit, | |
29f67386 | 396 | new_alloc_size, PAGE_SIZE); |
48c3b583 GP |
397 | if (!addr && new_area_size) |
398 | addr = memblock_find_in_range(0, | |
fd07383b AM |
399 | min(new_area_start, memblock.current_limit), |
400 | new_alloc_size, PAGE_SIZE); | |
48c3b583 | 401 | |
15674868 | 402 | new_array = addr ? __va(addr) : NULL; |
4e2f0775 | 403 | } |
1f5026a7 | 404 | if (!addr) { |
142b45a7 BH |
405 | pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", |
406 | memblock_type_name(type), type->max, type->max * 2); | |
407 | return -1; | |
408 | } | |
142b45a7 | 409 | |
fd07383b AM |
410 | memblock_dbg("memblock: %s is doubled to %ld at [%#010llx-%#010llx]", |
411 | memblock_type_name(type), type->max * 2, (u64)addr, | |
412 | (u64)addr + new_size - 1); | |
ea9e4376 | 413 | |
fd07383b AM |
414 | /* |
415 | * Found space, we now need to move the array over before we add the | |
416 | * reserved region since it may be our reserved array itself that is | |
417 | * full. | |
142b45a7 BH |
418 | */ |
419 | memcpy(new_array, type->regions, old_size); | |
420 | memset(new_array + type->max, 0, old_size); | |
421 | old_array = type->regions; | |
422 | type->regions = new_array; | |
423 | type->max <<= 1; | |
424 | ||
fd07383b | 425 | /* Free old array. We needn't free it if the array is the static one */ |
181eb394 GS |
426 | if (*in_slab) |
427 | kfree(old_array); | |
428 | else if (old_array != memblock_memory_init_regions && | |
429 | old_array != memblock_reserved_init_regions) | |
29f67386 | 430 | memblock_free(__pa(old_array), old_alloc_size); |
142b45a7 | 431 | |
fd07383b AM |
432 | /* |
433 | * Reserve the new array if that comes from the memblock. Otherwise, we | |
434 | * needn't do it | |
181eb394 GS |
435 | */ |
436 | if (!use_slab) | |
29f67386 | 437 | BUG_ON(memblock_reserve(addr, new_alloc_size)); |
181eb394 GS |
438 | |
439 | /* Update slab flag */ | |
440 | *in_slab = use_slab; | |
441 | ||
142b45a7 BH |
442 | return 0; |
443 | } | |
444 | ||
784656f9 TH |
445 | /** |
446 | * memblock_merge_regions - merge neighboring compatible regions | |
447 | * @type: memblock type to scan | |
448 | * | |
449 | * Scan @type and merge neighboring compatible regions. | |
450 | */ | |
451 | static void __init_memblock memblock_merge_regions(struct memblock_type *type) | |
95f72d1e | 452 | { |
784656f9 | 453 | int i = 0; |
95f72d1e | 454 | |
784656f9 TH |
455 | /* cnt never goes below 1 */ |
456 | while (i < type->cnt - 1) { | |
457 | struct memblock_region *this = &type->regions[i]; | |
458 | struct memblock_region *next = &type->regions[i + 1]; | |
95f72d1e | 459 | |
7c0caeb8 TH |
460 | if (this->base + this->size != next->base || |
461 | memblock_get_region_node(this) != | |
66a20757 TC |
462 | memblock_get_region_node(next) || |
463 | this->flags != next->flags) { | |
784656f9 TH |
464 | BUG_ON(this->base + this->size > next->base); |
465 | i++; | |
466 | continue; | |
8f7a6605 BH |
467 | } |
468 | ||
784656f9 | 469 | this->size += next->size; |
c0232ae8 LF |
470 | /* move forward from next + 1, index of which is i + 2 */ |
471 | memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); | |
784656f9 | 472 | type->cnt--; |
95f72d1e | 473 | } |
784656f9 | 474 | } |
95f72d1e | 475 | |
784656f9 TH |
476 | /** |
477 | * memblock_insert_region - insert new memblock region | |
209ff86d TC |
478 | * @type: memblock type to insert into |
479 | * @idx: index for the insertion point | |
480 | * @base: base address of the new region | |
481 | * @size: size of the new region | |
482 | * @nid: node id of the new region | |
66a20757 | 483 | * @flags: flags of the new region |
784656f9 TH |
484 | * |
485 | * Insert new memblock region [@base,@base+@size) into @type at @idx. | |
486 | * @type must already have extra room to accomodate the new region. | |
487 | */ | |
488 | static void __init_memblock memblock_insert_region(struct memblock_type *type, | |
489 | int idx, phys_addr_t base, | |
66a20757 TC |
490 | phys_addr_t size, |
491 | int nid, unsigned long flags) | |
784656f9 TH |
492 | { |
493 | struct memblock_region *rgn = &type->regions[idx]; | |
494 | ||
495 | BUG_ON(type->cnt >= type->max); | |
496 | memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); | |
497 | rgn->base = base; | |
498 | rgn->size = size; | |
66a20757 | 499 | rgn->flags = flags; |
7c0caeb8 | 500 | memblock_set_region_node(rgn, nid); |
784656f9 | 501 | type->cnt++; |
1440c4e2 | 502 | type->total_size += size; |
784656f9 TH |
503 | } |
504 | ||
505 | /** | |
f1af9d3a | 506 | * memblock_add_range - add new memblock region |
784656f9 TH |
507 | * @type: memblock type to add new region into |
508 | * @base: base address of the new region | |
509 | * @size: size of the new region | |
7fb0bc3f | 510 | * @nid: nid of the new region |
66a20757 | 511 | * @flags: flags of the new region |
784656f9 TH |
512 | * |
513 | * Add new memblock region [@base,@base+@size) into @type. The new region | |
514 | * is allowed to overlap with existing ones - overlaps don't affect already | |
515 | * existing regions. @type is guaranteed to be minimal (all neighbouring | |
516 | * compatible regions are merged) after the addition. | |
517 | * | |
518 | * RETURNS: | |
519 | * 0 on success, -errno on failure. | |
520 | */ | |
f1af9d3a | 521 | int __init_memblock memblock_add_range(struct memblock_type *type, |
66a20757 TC |
522 | phys_addr_t base, phys_addr_t size, |
523 | int nid, unsigned long flags) | |
784656f9 TH |
524 | { |
525 | bool insert = false; | |
eb18f1b5 TH |
526 | phys_addr_t obase = base; |
527 | phys_addr_t end = base + memblock_cap_size(base, &size); | |
784656f9 TH |
528 | int i, nr_new; |
529 | ||
b3dc627c TH |
530 | if (!size) |
531 | return 0; | |
532 | ||
784656f9 TH |
533 | /* special case for empty array */ |
534 | if (type->regions[0].size == 0) { | |
1440c4e2 | 535 | WARN_ON(type->cnt != 1 || type->total_size); |
8f7a6605 BH |
536 | type->regions[0].base = base; |
537 | type->regions[0].size = size; | |
66a20757 | 538 | type->regions[0].flags = flags; |
7fb0bc3f | 539 | memblock_set_region_node(&type->regions[0], nid); |
1440c4e2 | 540 | type->total_size = size; |
8f7a6605 | 541 | return 0; |
95f72d1e | 542 | } |
784656f9 TH |
543 | repeat: |
544 | /* | |
545 | * The following is executed twice. Once with %false @insert and | |
546 | * then with %true. The first counts the number of regions needed | |
547 | * to accomodate the new area. The second actually inserts them. | |
142b45a7 | 548 | */ |
784656f9 TH |
549 | base = obase; |
550 | nr_new = 0; | |
95f72d1e | 551 | |
784656f9 TH |
552 | for (i = 0; i < type->cnt; i++) { |
553 | struct memblock_region *rgn = &type->regions[i]; | |
554 | phys_addr_t rbase = rgn->base; | |
555 | phys_addr_t rend = rbase + rgn->size; | |
556 | ||
557 | if (rbase >= end) | |
95f72d1e | 558 | break; |
784656f9 TH |
559 | if (rend <= base) |
560 | continue; | |
561 | /* | |
562 | * @rgn overlaps. If it separates the lower part of new | |
563 | * area, insert that portion. | |
564 | */ | |
565 | if (rbase > base) { | |
c0a29498 WY |
566 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
567 | WARN_ON(nid != memblock_get_region_node(rgn)); | |
568 | #endif | |
4fcab5f4 | 569 | WARN_ON(flags != rgn->flags); |
784656f9 TH |
570 | nr_new++; |
571 | if (insert) | |
572 | memblock_insert_region(type, i++, base, | |
66a20757 TC |
573 | rbase - base, nid, |
574 | flags); | |
95f72d1e | 575 | } |
784656f9 TH |
576 | /* area below @rend is dealt with, forget about it */ |
577 | base = min(rend, end); | |
95f72d1e | 578 | } |
784656f9 TH |
579 | |
580 | /* insert the remaining portion */ | |
581 | if (base < end) { | |
582 | nr_new++; | |
583 | if (insert) | |
66a20757 TC |
584 | memblock_insert_region(type, i, base, end - base, |
585 | nid, flags); | |
95f72d1e | 586 | } |
95f72d1e | 587 | |
784656f9 TH |
588 | /* |
589 | * If this was the first round, resize array and repeat for actual | |
590 | * insertions; otherwise, merge and return. | |
142b45a7 | 591 | */ |
784656f9 TH |
592 | if (!insert) { |
593 | while (type->cnt + nr_new > type->max) | |
48c3b583 | 594 | if (memblock_double_array(type, obase, size) < 0) |
784656f9 TH |
595 | return -ENOMEM; |
596 | insert = true; | |
597 | goto repeat; | |
598 | } else { | |
599 | memblock_merge_regions(type); | |
600 | return 0; | |
142b45a7 | 601 | } |
95f72d1e YL |
602 | } |
603 | ||
7fb0bc3f TH |
604 | int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, |
605 | int nid) | |
606 | { | |
f1af9d3a | 607 | return memblock_add_range(&memblock.memory, base, size, nid, 0); |
7fb0bc3f TH |
608 | } |
609 | ||
6a4055bc AK |
610 | static int __init_memblock memblock_add_region(phys_addr_t base, |
611 | phys_addr_t size, | |
612 | int nid, | |
613 | unsigned long flags) | |
614 | { | |
567d117b | 615 | struct memblock_type *type = &memblock.memory; |
6a4055bc AK |
616 | |
617 | memblock_dbg("memblock_add: [%#016llx-%#016llx] flags %#02lx %pF\n", | |
618 | (unsigned long long)base, | |
619 | (unsigned long long)base + size - 1, | |
620 | flags, (void *)_RET_IP_); | |
621 | ||
567d117b | 622 | return memblock_add_range(type, base, size, nid, flags); |
6a4055bc AK |
623 | } |
624 | ||
581adcbe | 625 | int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) |
95f72d1e | 626 | { |
6a4055bc | 627 | return memblock_add_region(base, size, MAX_NUMNODES, 0); |
95f72d1e YL |
628 | } |
629 | ||
6a9ceb31 TH |
630 | /** |
631 | * memblock_isolate_range - isolate given range into disjoint memblocks | |
632 | * @type: memblock type to isolate range for | |
633 | * @base: base of range to isolate | |
634 | * @size: size of range to isolate | |
635 | * @start_rgn: out parameter for the start of isolated region | |
636 | * @end_rgn: out parameter for the end of isolated region | |
637 | * | |
638 | * Walk @type and ensure that regions don't cross the boundaries defined by | |
639 | * [@base,@base+@size). Crossing regions are split at the boundaries, | |
640 | * which may create at most two more regions. The index of the first | |
641 | * region inside the range is returned in *@start_rgn and end in *@end_rgn. | |
642 | * | |
643 | * RETURNS: | |
644 | * 0 on success, -errno on failure. | |
645 | */ | |
646 | static int __init_memblock memblock_isolate_range(struct memblock_type *type, | |
647 | phys_addr_t base, phys_addr_t size, | |
648 | int *start_rgn, int *end_rgn) | |
649 | { | |
eb18f1b5 | 650 | phys_addr_t end = base + memblock_cap_size(base, &size); |
6a9ceb31 TH |
651 | int i; |
652 | ||
653 | *start_rgn = *end_rgn = 0; | |
654 | ||
b3dc627c TH |
655 | if (!size) |
656 | return 0; | |
657 | ||
6a9ceb31 TH |
658 | /* we'll create at most two more regions */ |
659 | while (type->cnt + 2 > type->max) | |
48c3b583 | 660 | if (memblock_double_array(type, base, size) < 0) |
6a9ceb31 TH |
661 | return -ENOMEM; |
662 | ||
663 | for (i = 0; i < type->cnt; i++) { | |
664 | struct memblock_region *rgn = &type->regions[i]; | |
665 | phys_addr_t rbase = rgn->base; | |
666 | phys_addr_t rend = rbase + rgn->size; | |
667 | ||
668 | if (rbase >= end) | |
669 | break; | |
670 | if (rend <= base) | |
671 | continue; | |
672 | ||
673 | if (rbase < base) { | |
674 | /* | |
675 | * @rgn intersects from below. Split and continue | |
676 | * to process the next region - the new top half. | |
677 | */ | |
678 | rgn->base = base; | |
1440c4e2 TH |
679 | rgn->size -= base - rbase; |
680 | type->total_size -= base - rbase; | |
6a9ceb31 | 681 | memblock_insert_region(type, i, rbase, base - rbase, |
66a20757 TC |
682 | memblock_get_region_node(rgn), |
683 | rgn->flags); | |
6a9ceb31 TH |
684 | } else if (rend > end) { |
685 | /* | |
686 | * @rgn intersects from above. Split and redo the | |
687 | * current region - the new bottom half. | |
688 | */ | |
689 | rgn->base = end; | |
1440c4e2 TH |
690 | rgn->size -= end - rbase; |
691 | type->total_size -= end - rbase; | |
6a9ceb31 | 692 | memblock_insert_region(type, i--, rbase, end - rbase, |
66a20757 TC |
693 | memblock_get_region_node(rgn), |
694 | rgn->flags); | |
6a9ceb31 TH |
695 | } else { |
696 | /* @rgn is fully contained, record it */ | |
697 | if (!*end_rgn) | |
698 | *start_rgn = i; | |
699 | *end_rgn = i + 1; | |
700 | } | |
701 | } | |
702 | ||
703 | return 0; | |
704 | } | |
6a9ceb31 | 705 | |
35bd16a2 | 706 | static int __init_memblock memblock_remove_range(struct memblock_type *type, |
f1af9d3a | 707 | phys_addr_t base, phys_addr_t size) |
95f72d1e | 708 | { |
71936180 TH |
709 | int start_rgn, end_rgn; |
710 | int i, ret; | |
95f72d1e | 711 | |
71936180 TH |
712 | ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); |
713 | if (ret) | |
714 | return ret; | |
95f72d1e | 715 | |
71936180 TH |
716 | for (i = end_rgn - 1; i >= start_rgn; i--) |
717 | memblock_remove_region(type, i); | |
8f7a6605 | 718 | return 0; |
95f72d1e YL |
719 | } |
720 | ||
581adcbe | 721 | int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) |
95f72d1e | 722 | { |
f1af9d3a | 723 | return memblock_remove_range(&memblock.memory, base, size); |
95f72d1e YL |
724 | } |
725 | ||
f1af9d3a | 726 | |
581adcbe | 727 | int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) |
95f72d1e | 728 | { |
24aa0788 | 729 | memblock_dbg(" memblock_free: [%#016llx-%#016llx] %pF\n", |
a150439c | 730 | (unsigned long long)base, |
931d13f5 | 731 | (unsigned long long)base + size - 1, |
a150439c | 732 | (void *)_RET_IP_); |
24aa0788 | 733 | |
aedf95ea | 734 | kmemleak_free_part(__va(base), size); |
f1af9d3a | 735 | return memblock_remove_range(&memblock.reserved, base, size); |
95f72d1e YL |
736 | } |
737 | ||
66a20757 TC |
738 | static int __init_memblock memblock_reserve_region(phys_addr_t base, |
739 | phys_addr_t size, | |
740 | int nid, | |
741 | unsigned long flags) | |
95f72d1e | 742 | { |
7fc825b4 | 743 | struct memblock_type *type = &memblock.reserved; |
95f72d1e | 744 | |
66a20757 | 745 | memblock_dbg("memblock_reserve: [%#016llx-%#016llx] flags %#02lx %pF\n", |
a150439c | 746 | (unsigned long long)base, |
931d13f5 | 747 | (unsigned long long)base + size - 1, |
66a20757 TC |
748 | flags, (void *)_RET_IP_); |
749 | ||
7fc825b4 | 750 | return memblock_add_range(type, base, size, nid, flags); |
66a20757 | 751 | } |
95f72d1e | 752 | |
66a20757 TC |
753 | int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) |
754 | { | |
755 | return memblock_reserve_region(base, size, MAX_NUMNODES, 0); | |
95f72d1e YL |
756 | } |
757 | ||
66b16edf | 758 | /** |
66b16edf | 759 | * |
4308ce17 | 760 | * This function isolates region [@base, @base + @size), and sets/clears flag |
66b16edf | 761 | * |
c1153931 | 762 | * Return 0 on success, -errno on failure. |
66b16edf | 763 | */ |
4308ce17 TL |
764 | static int __init_memblock memblock_setclr_flag(phys_addr_t base, |
765 | phys_addr_t size, int set, int flag) | |
66b16edf TC |
766 | { |
767 | struct memblock_type *type = &memblock.memory; | |
768 | int i, ret, start_rgn, end_rgn; | |
769 | ||
770 | ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); | |
771 | if (ret) | |
772 | return ret; | |
773 | ||
774 | for (i = start_rgn; i < end_rgn; i++) | |
4308ce17 TL |
775 | if (set) |
776 | memblock_set_region_flags(&type->regions[i], flag); | |
777 | else | |
778 | memblock_clear_region_flags(&type->regions[i], flag); | |
66b16edf TC |
779 | |
780 | memblock_merge_regions(type); | |
781 | return 0; | |
782 | } | |
783 | ||
784 | /** | |
4308ce17 | 785 | * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. |
66b16edf TC |
786 | * @base: the base phys addr of the region |
787 | * @size: the size of the region | |
788 | * | |
c1153931 | 789 | * Return 0 on success, -errno on failure. |
4308ce17 TL |
790 | */ |
791 | int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) | |
792 | { | |
793 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); | |
794 | } | |
795 | ||
796 | /** | |
797 | * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. | |
798 | * @base: the base phys addr of the region | |
799 | * @size: the size of the region | |
66b16edf | 800 | * |
c1153931 | 801 | * Return 0 on success, -errno on failure. |
66b16edf TC |
802 | */ |
803 | int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) | |
804 | { | |
4308ce17 | 805 | return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); |
66b16edf TC |
806 | } |
807 | ||
a3f5bafc TL |
808 | /** |
809 | * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. | |
810 | * @base: the base phys addr of the region | |
811 | * @size: the size of the region | |
812 | * | |
c1153931 | 813 | * Return 0 on success, -errno on failure. |
a3f5bafc TL |
814 | */ |
815 | int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) | |
816 | { | |
817 | system_has_some_mirror = true; | |
818 | ||
819 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); | |
820 | } | |
821 | ||
bf3d3cc5 AB |
822 | /** |
823 | * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. | |
824 | * @base: the base phys addr of the region | |
825 | * @size: the size of the region | |
826 | * | |
827 | * Return 0 on success, -errno on failure. | |
828 | */ | |
829 | int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) | |
830 | { | |
831 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); | |
832 | } | |
a3f5bafc | 833 | |
8e7a7f86 RH |
834 | /** |
835 | * __next_reserved_mem_region - next function for for_each_reserved_region() | |
836 | * @idx: pointer to u64 loop variable | |
837 | * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL | |
838 | * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL | |
839 | * | |
840 | * Iterate over all reserved memory regions. | |
841 | */ | |
842 | void __init_memblock __next_reserved_mem_region(u64 *idx, | |
843 | phys_addr_t *out_start, | |
844 | phys_addr_t *out_end) | |
845 | { | |
567d117b | 846 | struct memblock_type *type = &memblock.reserved; |
8e7a7f86 | 847 | |
567d117b AK |
848 | if (*idx >= 0 && *idx < type->cnt) { |
849 | struct memblock_region *r = &type->regions[*idx]; | |
8e7a7f86 RH |
850 | phys_addr_t base = r->base; |
851 | phys_addr_t size = r->size; | |
852 | ||
853 | if (out_start) | |
854 | *out_start = base; | |
855 | if (out_end) | |
856 | *out_end = base + size - 1; | |
857 | ||
858 | *idx += 1; | |
859 | return; | |
860 | } | |
861 | ||
862 | /* signal end of iteration */ | |
863 | *idx = ULLONG_MAX; | |
864 | } | |
865 | ||
35fd0808 | 866 | /** |
f1af9d3a | 867 | * __next__mem_range - next function for for_each_free_mem_range() etc. |
35fd0808 | 868 | * @idx: pointer to u64 loop variable |
b1154233 | 869 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
fc6daaf9 | 870 | * @flags: pick from blocks based on memory attributes |
f1af9d3a PH |
871 | * @type_a: pointer to memblock_type from where the range is taken |
872 | * @type_b: pointer to memblock_type which excludes memory from being taken | |
dad7557e WL |
873 | * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL |
874 | * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
875 | * @out_nid: ptr to int for nid of the range, can be %NULL | |
35fd0808 | 876 | * |
f1af9d3a | 877 | * Find the first area from *@idx which matches @nid, fill the out |
35fd0808 | 878 | * parameters, and update *@idx for the next iteration. The lower 32bit of |
f1af9d3a PH |
879 | * *@idx contains index into type_a and the upper 32bit indexes the |
880 | * areas before each region in type_b. For example, if type_b regions | |
35fd0808 TH |
881 | * look like the following, |
882 | * | |
883 | * 0:[0-16), 1:[32-48), 2:[128-130) | |
884 | * | |
885 | * The upper 32bit indexes the following regions. | |
886 | * | |
887 | * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) | |
888 | * | |
889 | * As both region arrays are sorted, the function advances the two indices | |
890 | * in lockstep and returns each intersection. | |
891 | */ | |
fc6daaf9 | 892 | void __init_memblock __next_mem_range(u64 *idx, int nid, ulong flags, |
f1af9d3a PH |
893 | struct memblock_type *type_a, |
894 | struct memblock_type *type_b, | |
895 | phys_addr_t *out_start, | |
896 | phys_addr_t *out_end, int *out_nid) | |
35fd0808 | 897 | { |
f1af9d3a PH |
898 | int idx_a = *idx & 0xffffffff; |
899 | int idx_b = *idx >> 32; | |
b1154233 | 900 | |
f1af9d3a PH |
901 | if (WARN_ONCE(nid == MAX_NUMNODES, |
902 | "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) | |
560dca27 | 903 | nid = NUMA_NO_NODE; |
35fd0808 | 904 | |
f1af9d3a PH |
905 | for (; idx_a < type_a->cnt; idx_a++) { |
906 | struct memblock_region *m = &type_a->regions[idx_a]; | |
907 | ||
35fd0808 TH |
908 | phys_addr_t m_start = m->base; |
909 | phys_addr_t m_end = m->base + m->size; | |
f1af9d3a | 910 | int m_nid = memblock_get_region_node(m); |
35fd0808 TH |
911 | |
912 | /* only memory regions are associated with nodes, check it */ | |
f1af9d3a | 913 | if (nid != NUMA_NO_NODE && nid != m_nid) |
35fd0808 TH |
914 | continue; |
915 | ||
0a313a99 XQ |
916 | /* skip hotpluggable memory regions if needed */ |
917 | if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) | |
918 | continue; | |
919 | ||
a3f5bafc TL |
920 | /* if we want mirror memory skip non-mirror memory regions */ |
921 | if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) | |
922 | continue; | |
923 | ||
bf3d3cc5 AB |
924 | /* skip nomap memory unless we were asked for it explicitly */ |
925 | if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) | |
926 | continue; | |
927 | ||
f1af9d3a PH |
928 | if (!type_b) { |
929 | if (out_start) | |
930 | *out_start = m_start; | |
931 | if (out_end) | |
932 | *out_end = m_end; | |
933 | if (out_nid) | |
934 | *out_nid = m_nid; | |
935 | idx_a++; | |
936 | *idx = (u32)idx_a | (u64)idx_b << 32; | |
937 | return; | |
938 | } | |
939 | ||
940 | /* scan areas before each reservation */ | |
941 | for (; idx_b < type_b->cnt + 1; idx_b++) { | |
942 | struct memblock_region *r; | |
943 | phys_addr_t r_start; | |
944 | phys_addr_t r_end; | |
945 | ||
946 | r = &type_b->regions[idx_b]; | |
947 | r_start = idx_b ? r[-1].base + r[-1].size : 0; | |
948 | r_end = idx_b < type_b->cnt ? | |
949 | r->base : ULLONG_MAX; | |
35fd0808 | 950 | |
f1af9d3a PH |
951 | /* |
952 | * if idx_b advanced past idx_a, | |
953 | * break out to advance idx_a | |
954 | */ | |
35fd0808 TH |
955 | if (r_start >= m_end) |
956 | break; | |
957 | /* if the two regions intersect, we're done */ | |
958 | if (m_start < r_end) { | |
959 | if (out_start) | |
f1af9d3a PH |
960 | *out_start = |
961 | max(m_start, r_start); | |
35fd0808 TH |
962 | if (out_end) |
963 | *out_end = min(m_end, r_end); | |
964 | if (out_nid) | |
f1af9d3a | 965 | *out_nid = m_nid; |
35fd0808 | 966 | /* |
f1af9d3a PH |
967 | * The region which ends first is |
968 | * advanced for the next iteration. | |
35fd0808 TH |
969 | */ |
970 | if (m_end <= r_end) | |
f1af9d3a | 971 | idx_a++; |
35fd0808 | 972 | else |
f1af9d3a PH |
973 | idx_b++; |
974 | *idx = (u32)idx_a | (u64)idx_b << 32; | |
35fd0808 TH |
975 | return; |
976 | } | |
977 | } | |
978 | } | |
979 | ||
980 | /* signal end of iteration */ | |
981 | *idx = ULLONG_MAX; | |
982 | } | |
983 | ||
7bd0b0f0 | 984 | /** |
f1af9d3a PH |
985 | * __next_mem_range_rev - generic next function for for_each_*_range_rev() |
986 | * | |
987 | * Finds the next range from type_a which is not marked as unsuitable | |
988 | * in type_b. | |
989 | * | |
7bd0b0f0 | 990 | * @idx: pointer to u64 loop variable |
ad5ea8cd | 991 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
fc6daaf9 | 992 | * @flags: pick from blocks based on memory attributes |
f1af9d3a PH |
993 | * @type_a: pointer to memblock_type from where the range is taken |
994 | * @type_b: pointer to memblock_type which excludes memory from being taken | |
dad7557e WL |
995 | * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL |
996 | * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
997 | * @out_nid: ptr to int for nid of the range, can be %NULL | |
7bd0b0f0 | 998 | * |
f1af9d3a | 999 | * Reverse of __next_mem_range(). |
7bd0b0f0 | 1000 | */ |
fc6daaf9 | 1001 | void __init_memblock __next_mem_range_rev(u64 *idx, int nid, ulong flags, |
f1af9d3a PH |
1002 | struct memblock_type *type_a, |
1003 | struct memblock_type *type_b, | |
1004 | phys_addr_t *out_start, | |
1005 | phys_addr_t *out_end, int *out_nid) | |
7bd0b0f0 | 1006 | { |
f1af9d3a PH |
1007 | int idx_a = *idx & 0xffffffff; |
1008 | int idx_b = *idx >> 32; | |
b1154233 | 1009 | |
560dca27 GS |
1010 | if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) |
1011 | nid = NUMA_NO_NODE; | |
7bd0b0f0 TH |
1012 | |
1013 | if (*idx == (u64)ULLONG_MAX) { | |
f1af9d3a PH |
1014 | idx_a = type_a->cnt - 1; |
1015 | idx_b = type_b->cnt; | |
7bd0b0f0 TH |
1016 | } |
1017 | ||
f1af9d3a PH |
1018 | for (; idx_a >= 0; idx_a--) { |
1019 | struct memblock_region *m = &type_a->regions[idx_a]; | |
1020 | ||
7bd0b0f0 TH |
1021 | phys_addr_t m_start = m->base; |
1022 | phys_addr_t m_end = m->base + m->size; | |
f1af9d3a | 1023 | int m_nid = memblock_get_region_node(m); |
7bd0b0f0 TH |
1024 | |
1025 | /* only memory regions are associated with nodes, check it */ | |
f1af9d3a | 1026 | if (nid != NUMA_NO_NODE && nid != m_nid) |
7bd0b0f0 TH |
1027 | continue; |
1028 | ||
55ac590c TC |
1029 | /* skip hotpluggable memory regions if needed */ |
1030 | if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) | |
1031 | continue; | |
1032 | ||
a3f5bafc TL |
1033 | /* if we want mirror memory skip non-mirror memory regions */ |
1034 | if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) | |
1035 | continue; | |
1036 | ||
bf3d3cc5 AB |
1037 | /* skip nomap memory unless we were asked for it explicitly */ |
1038 | if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) | |
1039 | continue; | |
1040 | ||
f1af9d3a PH |
1041 | if (!type_b) { |
1042 | if (out_start) | |
1043 | *out_start = m_start; | |
1044 | if (out_end) | |
1045 | *out_end = m_end; | |
1046 | if (out_nid) | |
1047 | *out_nid = m_nid; | |
1048 | idx_a++; | |
1049 | *idx = (u32)idx_a | (u64)idx_b << 32; | |
1050 | return; | |
1051 | } | |
1052 | ||
1053 | /* scan areas before each reservation */ | |
1054 | for (; idx_b >= 0; idx_b--) { | |
1055 | struct memblock_region *r; | |
1056 | phys_addr_t r_start; | |
1057 | phys_addr_t r_end; | |
1058 | ||
1059 | r = &type_b->regions[idx_b]; | |
1060 | r_start = idx_b ? r[-1].base + r[-1].size : 0; | |
1061 | r_end = idx_b < type_b->cnt ? | |
1062 | r->base : ULLONG_MAX; | |
1063 | /* | |
1064 | * if idx_b advanced past idx_a, | |
1065 | * break out to advance idx_a | |
1066 | */ | |
7bd0b0f0 | 1067 | |
7bd0b0f0 TH |
1068 | if (r_end <= m_start) |
1069 | break; | |
1070 | /* if the two regions intersect, we're done */ | |
1071 | if (m_end > r_start) { | |
1072 | if (out_start) | |
1073 | *out_start = max(m_start, r_start); | |
1074 | if (out_end) | |
1075 | *out_end = min(m_end, r_end); | |
1076 | if (out_nid) | |
f1af9d3a | 1077 | *out_nid = m_nid; |
7bd0b0f0 | 1078 | if (m_start >= r_start) |
f1af9d3a | 1079 | idx_a--; |
7bd0b0f0 | 1080 | else |
f1af9d3a PH |
1081 | idx_b--; |
1082 | *idx = (u32)idx_a | (u64)idx_b << 32; | |
7bd0b0f0 TH |
1083 | return; |
1084 | } | |
1085 | } | |
1086 | } | |
f1af9d3a | 1087 | /* signal end of iteration */ |
7bd0b0f0 TH |
1088 | *idx = ULLONG_MAX; |
1089 | } | |
1090 | ||
7c0caeb8 TH |
1091 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
1092 | /* | |
1093 | * Common iterator interface used to define for_each_mem_range(). | |
1094 | */ | |
1095 | void __init_memblock __next_mem_pfn_range(int *idx, int nid, | |
1096 | unsigned long *out_start_pfn, | |
1097 | unsigned long *out_end_pfn, int *out_nid) | |
1098 | { | |
1099 | struct memblock_type *type = &memblock.memory; | |
1100 | struct memblock_region *r; | |
1101 | ||
1102 | while (++*idx < type->cnt) { | |
1103 | r = &type->regions[*idx]; | |
1104 | ||
1105 | if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) | |
1106 | continue; | |
1107 | if (nid == MAX_NUMNODES || nid == r->nid) | |
1108 | break; | |
1109 | } | |
1110 | if (*idx >= type->cnt) { | |
1111 | *idx = -1; | |
1112 | return; | |
1113 | } | |
1114 | ||
1115 | if (out_start_pfn) | |
1116 | *out_start_pfn = PFN_UP(r->base); | |
1117 | if (out_end_pfn) | |
1118 | *out_end_pfn = PFN_DOWN(r->base + r->size); | |
1119 | if (out_nid) | |
1120 | *out_nid = r->nid; | |
1121 | } | |
1122 | ||
1123 | /** | |
1124 | * memblock_set_node - set node ID on memblock regions | |
1125 | * @base: base of area to set node ID for | |
1126 | * @size: size of area to set node ID for | |
e7e8de59 | 1127 | * @type: memblock type to set node ID for |
7c0caeb8 TH |
1128 | * @nid: node ID to set |
1129 | * | |
e7e8de59 | 1130 | * Set the nid of memblock @type regions in [@base,@base+@size) to @nid. |
7c0caeb8 TH |
1131 | * Regions which cross the area boundaries are split as necessary. |
1132 | * | |
1133 | * RETURNS: | |
1134 | * 0 on success, -errno on failure. | |
1135 | */ | |
1136 | int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, | |
e7e8de59 | 1137 | struct memblock_type *type, int nid) |
7c0caeb8 | 1138 | { |
6a9ceb31 TH |
1139 | int start_rgn, end_rgn; |
1140 | int i, ret; | |
7c0caeb8 | 1141 | |
6a9ceb31 TH |
1142 | ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); |
1143 | if (ret) | |
1144 | return ret; | |
7c0caeb8 | 1145 | |
6a9ceb31 | 1146 | for (i = start_rgn; i < end_rgn; i++) |
e9d24ad3 | 1147 | memblock_set_region_node(&type->regions[i], nid); |
7c0caeb8 TH |
1148 | |
1149 | memblock_merge_regions(type); | |
1150 | return 0; | |
1151 | } | |
1152 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
1153 | ||
2bfc2862 AM |
1154 | static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, |
1155 | phys_addr_t align, phys_addr_t start, | |
fc6daaf9 | 1156 | phys_addr_t end, int nid, ulong flags) |
95f72d1e | 1157 | { |
6ed311b2 | 1158 | phys_addr_t found; |
95f72d1e | 1159 | |
79f40fab GS |
1160 | if (!align) |
1161 | align = SMP_CACHE_BYTES; | |
94f3d3af | 1162 | |
fc6daaf9 TL |
1163 | found = memblock_find_in_range_node(size, align, start, end, nid, |
1164 | flags); | |
aedf95ea CM |
1165 | if (found && !memblock_reserve(found, size)) { |
1166 | /* | |
1167 | * The min_count is set to 0 so that memblock allocations are | |
1168 | * never reported as leaks. | |
1169 | */ | |
1170 | kmemleak_alloc(__va(found), size, 0, 0); | |
6ed311b2 | 1171 | return found; |
aedf95ea | 1172 | } |
6ed311b2 | 1173 | return 0; |
95f72d1e YL |
1174 | } |
1175 | ||
2bfc2862 | 1176 | phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, |
fc6daaf9 TL |
1177 | phys_addr_t start, phys_addr_t end, |
1178 | ulong flags) | |
2bfc2862 | 1179 | { |
fc6daaf9 TL |
1180 | return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, |
1181 | flags); | |
2bfc2862 AM |
1182 | } |
1183 | ||
1184 | static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size, | |
1185 | phys_addr_t align, phys_addr_t max_addr, | |
fc6daaf9 | 1186 | int nid, ulong flags) |
2bfc2862 | 1187 | { |
fc6daaf9 | 1188 | return memblock_alloc_range_nid(size, align, 0, max_addr, nid, flags); |
2bfc2862 AM |
1189 | } |
1190 | ||
7bd0b0f0 TH |
1191 | phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) |
1192 | { | |
a3f5bafc TL |
1193 | ulong flags = choose_memblock_flags(); |
1194 | phys_addr_t ret; | |
1195 | ||
1196 | again: | |
1197 | ret = memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, | |
1198 | nid, flags); | |
1199 | ||
1200 | if (!ret && (flags & MEMBLOCK_MIRROR)) { | |
1201 | flags &= ~MEMBLOCK_MIRROR; | |
1202 | goto again; | |
1203 | } | |
1204 | return ret; | |
7bd0b0f0 TH |
1205 | } |
1206 | ||
1207 | phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) | |
1208 | { | |
fc6daaf9 TL |
1209 | return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE, |
1210 | MEMBLOCK_NONE); | |
7bd0b0f0 TH |
1211 | } |
1212 | ||
6ed311b2 | 1213 | phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) |
95f72d1e | 1214 | { |
6ed311b2 BH |
1215 | phys_addr_t alloc; |
1216 | ||
1217 | alloc = __memblock_alloc_base(size, align, max_addr); | |
1218 | ||
1219 | if (alloc == 0) | |
1220 | panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n", | |
1221 | (unsigned long long) size, (unsigned long long) max_addr); | |
1222 | ||
1223 | return alloc; | |
95f72d1e YL |
1224 | } |
1225 | ||
6ed311b2 | 1226 | phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) |
95f72d1e | 1227 | { |
6ed311b2 BH |
1228 | return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); |
1229 | } | |
95f72d1e | 1230 | |
9d1e2492 BH |
1231 | phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) |
1232 | { | |
1233 | phys_addr_t res = memblock_alloc_nid(size, align, nid); | |
1234 | ||
1235 | if (res) | |
1236 | return res; | |
15fb0972 | 1237 | return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); |
95f72d1e YL |
1238 | } |
1239 | ||
26f09e9b SS |
1240 | /** |
1241 | * memblock_virt_alloc_internal - allocate boot memory block | |
1242 | * @size: size of memory block to be allocated in bytes | |
1243 | * @align: alignment of the region and block's size | |
1244 | * @min_addr: the lower bound of the memory region to allocate (phys address) | |
1245 | * @max_addr: the upper bound of the memory region to allocate (phys address) | |
1246 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node | |
1247 | * | |
1248 | * The @min_addr limit is dropped if it can not be satisfied and the allocation | |
1249 | * will fall back to memory below @min_addr. Also, allocation may fall back | |
1250 | * to any node in the system if the specified node can not | |
1251 | * hold the requested memory. | |
1252 | * | |
1253 | * The allocation is performed from memory region limited by | |
1254 | * memblock.current_limit if @max_addr == %BOOTMEM_ALLOC_ACCESSIBLE. | |
1255 | * | |
1256 | * The memory block is aligned on SMP_CACHE_BYTES if @align == 0. | |
1257 | * | |
1258 | * The phys address of allocated boot memory block is converted to virtual and | |
1259 | * allocated memory is reset to 0. | |
1260 | * | |
1261 | * In addition, function sets the min_count to 0 using kmemleak_alloc for | |
1262 | * allocated boot memory block, so that it is never reported as leaks. | |
1263 | * | |
1264 | * RETURNS: | |
1265 | * Virtual address of allocated memory block on success, NULL on failure. | |
1266 | */ | |
1267 | static void * __init memblock_virt_alloc_internal( | |
1268 | phys_addr_t size, phys_addr_t align, | |
1269 | phys_addr_t min_addr, phys_addr_t max_addr, | |
1270 | int nid) | |
1271 | { | |
1272 | phys_addr_t alloc; | |
1273 | void *ptr; | |
a3f5bafc | 1274 | ulong flags = choose_memblock_flags(); |
26f09e9b | 1275 | |
560dca27 GS |
1276 | if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) |
1277 | nid = NUMA_NO_NODE; | |
26f09e9b SS |
1278 | |
1279 | /* | |
1280 | * Detect any accidental use of these APIs after slab is ready, as at | |
1281 | * this moment memblock may be deinitialized already and its | |
1282 | * internal data may be destroyed (after execution of free_all_bootmem) | |
1283 | */ | |
1284 | if (WARN_ON_ONCE(slab_is_available())) | |
1285 | return kzalloc_node(size, GFP_NOWAIT, nid); | |
1286 | ||
1287 | if (!align) | |
1288 | align = SMP_CACHE_BYTES; | |
1289 | ||
f544e14f YL |
1290 | if (max_addr > memblock.current_limit) |
1291 | max_addr = memblock.current_limit; | |
1292 | ||
26f09e9b SS |
1293 | again: |
1294 | alloc = memblock_find_in_range_node(size, align, min_addr, max_addr, | |
a3f5bafc | 1295 | nid, flags); |
26f09e9b SS |
1296 | if (alloc) |
1297 | goto done; | |
1298 | ||
1299 | if (nid != NUMA_NO_NODE) { | |
1300 | alloc = memblock_find_in_range_node(size, align, min_addr, | |
fc6daaf9 | 1301 | max_addr, NUMA_NO_NODE, |
a3f5bafc | 1302 | flags); |
26f09e9b SS |
1303 | if (alloc) |
1304 | goto done; | |
1305 | } | |
1306 | ||
1307 | if (min_addr) { | |
1308 | min_addr = 0; | |
1309 | goto again; | |
26f09e9b SS |
1310 | } |
1311 | ||
a3f5bafc TL |
1312 | if (flags & MEMBLOCK_MIRROR) { |
1313 | flags &= ~MEMBLOCK_MIRROR; | |
1314 | pr_warn("Could not allocate %pap bytes of mirrored memory\n", | |
1315 | &size); | |
1316 | goto again; | |
1317 | } | |
1318 | ||
1319 | return NULL; | |
26f09e9b SS |
1320 | done: |
1321 | memblock_reserve(alloc, size); | |
1322 | ptr = phys_to_virt(alloc); | |
1323 | memset(ptr, 0, size); | |
1324 | ||
1325 | /* | |
1326 | * The min_count is set to 0 so that bootmem allocated blocks | |
1327 | * are never reported as leaks. This is because many of these blocks | |
1328 | * are only referred via the physical address which is not | |
1329 | * looked up by kmemleak. | |
1330 | */ | |
1331 | kmemleak_alloc(ptr, size, 0, 0); | |
1332 | ||
1333 | return ptr; | |
26f09e9b SS |
1334 | } |
1335 | ||
1336 | /** | |
1337 | * memblock_virt_alloc_try_nid_nopanic - allocate boot memory block | |
1338 | * @size: size of memory block to be allocated in bytes | |
1339 | * @align: alignment of the region and block's size | |
1340 | * @min_addr: the lower bound of the memory region from where the allocation | |
1341 | * is preferred (phys address) | |
1342 | * @max_addr: the upper bound of the memory region from where the allocation | |
1343 | * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to | |
1344 | * allocate only from memory limited by memblock.current_limit value | |
1345 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node | |
1346 | * | |
1347 | * Public version of _memblock_virt_alloc_try_nid_nopanic() which provides | |
1348 | * additional debug information (including caller info), if enabled. | |
1349 | * | |
1350 | * RETURNS: | |
1351 | * Virtual address of allocated memory block on success, NULL on failure. | |
1352 | */ | |
1353 | void * __init memblock_virt_alloc_try_nid_nopanic( | |
1354 | phys_addr_t size, phys_addr_t align, | |
1355 | phys_addr_t min_addr, phys_addr_t max_addr, | |
1356 | int nid) | |
1357 | { | |
1358 | memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", | |
1359 | __func__, (u64)size, (u64)align, nid, (u64)min_addr, | |
1360 | (u64)max_addr, (void *)_RET_IP_); | |
1361 | return memblock_virt_alloc_internal(size, align, min_addr, | |
1362 | max_addr, nid); | |
1363 | } | |
1364 | ||
1365 | /** | |
1366 | * memblock_virt_alloc_try_nid - allocate boot memory block with panicking | |
1367 | * @size: size of memory block to be allocated in bytes | |
1368 | * @align: alignment of the region and block's size | |
1369 | * @min_addr: the lower bound of the memory region from where the allocation | |
1370 | * is preferred (phys address) | |
1371 | * @max_addr: the upper bound of the memory region from where the allocation | |
1372 | * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to | |
1373 | * allocate only from memory limited by memblock.current_limit value | |
1374 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node | |
1375 | * | |
1376 | * Public panicking version of _memblock_virt_alloc_try_nid_nopanic() | |
1377 | * which provides debug information (including caller info), if enabled, | |
1378 | * and panics if the request can not be satisfied. | |
1379 | * | |
1380 | * RETURNS: | |
1381 | * Virtual address of allocated memory block on success, NULL on failure. | |
1382 | */ | |
1383 | void * __init memblock_virt_alloc_try_nid( | |
1384 | phys_addr_t size, phys_addr_t align, | |
1385 | phys_addr_t min_addr, phys_addr_t max_addr, | |
1386 | int nid) | |
1387 | { | |
1388 | void *ptr; | |
1389 | ||
1390 | memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", | |
1391 | __func__, (u64)size, (u64)align, nid, (u64)min_addr, | |
1392 | (u64)max_addr, (void *)_RET_IP_); | |
1393 | ptr = memblock_virt_alloc_internal(size, align, | |
1394 | min_addr, max_addr, nid); | |
1395 | if (ptr) | |
1396 | return ptr; | |
1397 | ||
1398 | panic("%s: Failed to allocate %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx\n", | |
1399 | __func__, (u64)size, (u64)align, nid, (u64)min_addr, | |
1400 | (u64)max_addr); | |
1401 | return NULL; | |
1402 | } | |
1403 | ||
1404 | /** | |
1405 | * __memblock_free_early - free boot memory block | |
1406 | * @base: phys starting address of the boot memory block | |
1407 | * @size: size of the boot memory block in bytes | |
1408 | * | |
1409 | * Free boot memory block previously allocated by memblock_virt_alloc_xx() API. | |
1410 | * The freeing memory will not be released to the buddy allocator. | |
1411 | */ | |
1412 | void __init __memblock_free_early(phys_addr_t base, phys_addr_t size) | |
1413 | { | |
1414 | memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", | |
1415 | __func__, (u64)base, (u64)base + size - 1, | |
1416 | (void *)_RET_IP_); | |
1417 | kmemleak_free_part(__va(base), size); | |
f1af9d3a | 1418 | memblock_remove_range(&memblock.reserved, base, size); |
26f09e9b SS |
1419 | } |
1420 | ||
1421 | /* | |
1422 | * __memblock_free_late - free bootmem block pages directly to buddy allocator | |
1423 | * @addr: phys starting address of the boot memory block | |
1424 | * @size: size of the boot memory block in bytes | |
1425 | * | |
1426 | * This is only useful when the bootmem allocator has already been torn | |
1427 | * down, but we are still initializing the system. Pages are released directly | |
1428 | * to the buddy allocator, no bootmem metadata is updated because it is gone. | |
1429 | */ | |
1430 | void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) | |
1431 | { | |
1432 | u64 cursor, end; | |
1433 | ||
1434 | memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", | |
1435 | __func__, (u64)base, (u64)base + size - 1, | |
1436 | (void *)_RET_IP_); | |
1437 | kmemleak_free_part(__va(base), size); | |
1438 | cursor = PFN_UP(base); | |
1439 | end = PFN_DOWN(base + size); | |
1440 | ||
1441 | for (; cursor < end; cursor++) { | |
d70ddd7a | 1442 | __free_pages_bootmem(pfn_to_page(cursor), cursor, 0); |
26f09e9b SS |
1443 | totalram_pages++; |
1444 | } | |
1445 | } | |
9d1e2492 BH |
1446 | |
1447 | /* | |
1448 | * Remaining API functions | |
1449 | */ | |
1450 | ||
2898cc4c | 1451 | phys_addr_t __init memblock_phys_mem_size(void) |
95f72d1e | 1452 | { |
1440c4e2 | 1453 | return memblock.memory.total_size; |
95f72d1e YL |
1454 | } |
1455 | ||
595ad9af YL |
1456 | phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) |
1457 | { | |
1458 | unsigned long pages = 0; | |
1459 | struct memblock_region *r; | |
1460 | unsigned long start_pfn, end_pfn; | |
1461 | ||
1462 | for_each_memblock(memory, r) { | |
1463 | start_pfn = memblock_region_memory_base_pfn(r); | |
1464 | end_pfn = memblock_region_memory_end_pfn(r); | |
1465 | start_pfn = min_t(unsigned long, start_pfn, limit_pfn); | |
1466 | end_pfn = min_t(unsigned long, end_pfn, limit_pfn); | |
1467 | pages += end_pfn - start_pfn; | |
1468 | } | |
1469 | ||
16763230 | 1470 | return PFN_PHYS(pages); |
595ad9af YL |
1471 | } |
1472 | ||
0a93ebef SR |
1473 | /* lowest address */ |
1474 | phys_addr_t __init_memblock memblock_start_of_DRAM(void) | |
1475 | { | |
1476 | return memblock.memory.regions[0].base; | |
1477 | } | |
1478 | ||
10d06439 | 1479 | phys_addr_t __init_memblock memblock_end_of_DRAM(void) |
95f72d1e YL |
1480 | { |
1481 | int idx = memblock.memory.cnt - 1; | |
1482 | ||
e3239ff9 | 1483 | return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); |
95f72d1e YL |
1484 | } |
1485 | ||
c0ce8fef | 1486 | void __init memblock_enforce_memory_limit(phys_addr_t limit) |
95f72d1e | 1487 | { |
c0ce8fef | 1488 | phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; |
136199f0 | 1489 | struct memblock_region *r; |
95f72d1e | 1490 | |
c0ce8fef | 1491 | if (!limit) |
95f72d1e YL |
1492 | return; |
1493 | ||
c0ce8fef | 1494 | /* find out max address */ |
136199f0 | 1495 | for_each_memblock(memory, r) { |
c0ce8fef TH |
1496 | if (limit <= r->size) { |
1497 | max_addr = r->base + limit; | |
1498 | break; | |
95f72d1e | 1499 | } |
c0ce8fef | 1500 | limit -= r->size; |
95f72d1e | 1501 | } |
c0ce8fef TH |
1502 | |
1503 | /* truncate both memory and reserved regions */ | |
f1af9d3a PH |
1504 | memblock_remove_range(&memblock.memory, max_addr, |
1505 | (phys_addr_t)ULLONG_MAX); | |
1506 | memblock_remove_range(&memblock.reserved, max_addr, | |
1507 | (phys_addr_t)ULLONG_MAX); | |
95f72d1e YL |
1508 | } |
1509 | ||
cd79481d | 1510 | static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) |
72d4b0b4 BH |
1511 | { |
1512 | unsigned int left = 0, right = type->cnt; | |
1513 | ||
1514 | do { | |
1515 | unsigned int mid = (right + left) / 2; | |
1516 | ||
1517 | if (addr < type->regions[mid].base) | |
1518 | right = mid; | |
1519 | else if (addr >= (type->regions[mid].base + | |
1520 | type->regions[mid].size)) | |
1521 | left = mid + 1; | |
1522 | else | |
1523 | return mid; | |
1524 | } while (left < right); | |
1525 | return -1; | |
1526 | } | |
1527 | ||
b4ad0c7e | 1528 | bool __init memblock_is_reserved(phys_addr_t addr) |
95f72d1e | 1529 | { |
72d4b0b4 BH |
1530 | return memblock_search(&memblock.reserved, addr) != -1; |
1531 | } | |
95f72d1e | 1532 | |
b4ad0c7e | 1533 | bool __init_memblock memblock_is_memory(phys_addr_t addr) |
72d4b0b4 BH |
1534 | { |
1535 | return memblock_search(&memblock.memory, addr) != -1; | |
1536 | } | |
1537 | ||
bf3d3cc5 AB |
1538 | int __init_memblock memblock_is_map_memory(phys_addr_t addr) |
1539 | { | |
1540 | int i = memblock_search(&memblock.memory, addr); | |
1541 | ||
1542 | if (i == -1) | |
1543 | return false; | |
1544 | return !memblock_is_nomap(&memblock.memory.regions[i]); | |
1545 | } | |
1546 | ||
e76b63f8 YL |
1547 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
1548 | int __init_memblock memblock_search_pfn_nid(unsigned long pfn, | |
1549 | unsigned long *start_pfn, unsigned long *end_pfn) | |
1550 | { | |
1551 | struct memblock_type *type = &memblock.memory; | |
16763230 | 1552 | int mid = memblock_search(type, PFN_PHYS(pfn)); |
e76b63f8 YL |
1553 | |
1554 | if (mid == -1) | |
1555 | return -1; | |
1556 | ||
f7e2f7e8 FF |
1557 | *start_pfn = PFN_DOWN(type->regions[mid].base); |
1558 | *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); | |
e76b63f8 YL |
1559 | |
1560 | return type->regions[mid].nid; | |
1561 | } | |
1562 | #endif | |
1563 | ||
eab30949 SB |
1564 | /** |
1565 | * memblock_is_region_memory - check if a region is a subset of memory | |
1566 | * @base: base of region to check | |
1567 | * @size: size of region to check | |
1568 | * | |
1569 | * Check if the region [@base, @base+@size) is a subset of a memory block. | |
1570 | * | |
1571 | * RETURNS: | |
1572 | * 0 if false, non-zero if true | |
1573 | */ | |
3661ca66 | 1574 | int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) |
72d4b0b4 | 1575 | { |
abb65272 | 1576 | int idx = memblock_search(&memblock.memory, base); |
eb18f1b5 | 1577 | phys_addr_t end = base + memblock_cap_size(base, &size); |
72d4b0b4 BH |
1578 | |
1579 | if (idx == -1) | |
1580 | return 0; | |
abb65272 TV |
1581 | return memblock.memory.regions[idx].base <= base && |
1582 | (memblock.memory.regions[idx].base + | |
eb18f1b5 | 1583 | memblock.memory.regions[idx].size) >= end; |
95f72d1e YL |
1584 | } |
1585 | ||
eab30949 SB |
1586 | /** |
1587 | * memblock_is_region_reserved - check if a region intersects reserved memory | |
1588 | * @base: base of region to check | |
1589 | * @size: size of region to check | |
1590 | * | |
1591 | * Check if the region [@base, @base+@size) intersects a reserved memory block. | |
1592 | * | |
1593 | * RETURNS: | |
c5c5c9d1 | 1594 | * True if they intersect, false if not. |
eab30949 | 1595 | */ |
c5c5c9d1 | 1596 | bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) |
95f72d1e | 1597 | { |
eb18f1b5 | 1598 | memblock_cap_size(base, &size); |
c5c5c9d1 | 1599 | return memblock_overlaps_region(&memblock.reserved, base, size); |
95f72d1e YL |
1600 | } |
1601 | ||
6ede1fd3 YL |
1602 | void __init_memblock memblock_trim_memory(phys_addr_t align) |
1603 | { | |
6ede1fd3 | 1604 | phys_addr_t start, end, orig_start, orig_end; |
136199f0 | 1605 | struct memblock_region *r; |
6ede1fd3 | 1606 | |
136199f0 EM |
1607 | for_each_memblock(memory, r) { |
1608 | orig_start = r->base; | |
1609 | orig_end = r->base + r->size; | |
6ede1fd3 YL |
1610 | start = round_up(orig_start, align); |
1611 | end = round_down(orig_end, align); | |
1612 | ||
1613 | if (start == orig_start && end == orig_end) | |
1614 | continue; | |
1615 | ||
1616 | if (start < end) { | |
136199f0 EM |
1617 | r->base = start; |
1618 | r->size = end - start; | |
6ede1fd3 | 1619 | } else { |
136199f0 EM |
1620 | memblock_remove_region(&memblock.memory, |
1621 | r - memblock.memory.regions); | |
1622 | r--; | |
6ede1fd3 YL |
1623 | } |
1624 | } | |
1625 | } | |
e63075a3 | 1626 | |
3661ca66 | 1627 | void __init_memblock memblock_set_current_limit(phys_addr_t limit) |
e63075a3 BH |
1628 | { |
1629 | memblock.current_limit = limit; | |
1630 | } | |
1631 | ||
fec51014 LA |
1632 | phys_addr_t __init_memblock memblock_get_current_limit(void) |
1633 | { | |
1634 | return memblock.current_limit; | |
1635 | } | |
1636 | ||
7c0caeb8 | 1637 | static void __init_memblock memblock_dump(struct memblock_type *type, char *name) |
6ed311b2 BH |
1638 | { |
1639 | unsigned long long base, size; | |
66a20757 | 1640 | unsigned long flags; |
6ed311b2 BH |
1641 | int i; |
1642 | ||
7c0caeb8 | 1643 | pr_info(" %s.cnt = 0x%lx\n", name, type->cnt); |
6ed311b2 | 1644 | |
7c0caeb8 TH |
1645 | for (i = 0; i < type->cnt; i++) { |
1646 | struct memblock_region *rgn = &type->regions[i]; | |
1647 | char nid_buf[32] = ""; | |
1648 | ||
1649 | base = rgn->base; | |
1650 | size = rgn->size; | |
66a20757 | 1651 | flags = rgn->flags; |
7c0caeb8 TH |
1652 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
1653 | if (memblock_get_region_node(rgn) != MAX_NUMNODES) | |
1654 | snprintf(nid_buf, sizeof(nid_buf), " on node %d", | |
1655 | memblock_get_region_node(rgn)); | |
1656 | #endif | |
66a20757 TC |
1657 | pr_info(" %s[%#x]\t[%#016llx-%#016llx], %#llx bytes%s flags: %#lx\n", |
1658 | name, i, base, base + size - 1, size, nid_buf, flags); | |
6ed311b2 BH |
1659 | } |
1660 | } | |
1661 | ||
4ff7b82f | 1662 | void __init_memblock __memblock_dump_all(void) |
6ed311b2 | 1663 | { |
6ed311b2 | 1664 | pr_info("MEMBLOCK configuration:\n"); |
1440c4e2 TH |
1665 | pr_info(" memory size = %#llx reserved size = %#llx\n", |
1666 | (unsigned long long)memblock.memory.total_size, | |
1667 | (unsigned long long)memblock.reserved.total_size); | |
6ed311b2 BH |
1668 | |
1669 | memblock_dump(&memblock.memory, "memory"); | |
1670 | memblock_dump(&memblock.reserved, "reserved"); | |
1671 | } | |
1672 | ||
1aadc056 | 1673 | void __init memblock_allow_resize(void) |
6ed311b2 | 1674 | { |
142b45a7 | 1675 | memblock_can_resize = 1; |
6ed311b2 BH |
1676 | } |
1677 | ||
6ed311b2 BH |
1678 | static int __init early_memblock(char *p) |
1679 | { | |
1680 | if (p && strstr(p, "debug")) | |
1681 | memblock_debug = 1; | |
1682 | return 0; | |
1683 | } | |
1684 | early_param("memblock", early_memblock); | |
1685 | ||
c378ddd5 | 1686 | #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) |
6d03b885 BH |
1687 | |
1688 | static int memblock_debug_show(struct seq_file *m, void *private) | |
1689 | { | |
1690 | struct memblock_type *type = m->private; | |
1691 | struct memblock_region *reg; | |
1692 | int i; | |
1693 | ||
1694 | for (i = 0; i < type->cnt; i++) { | |
1695 | reg = &type->regions[i]; | |
1696 | seq_printf(m, "%4d: ", i); | |
1697 | if (sizeof(phys_addr_t) == 4) | |
1698 | seq_printf(m, "0x%08lx..0x%08lx\n", | |
1699 | (unsigned long)reg->base, | |
1700 | (unsigned long)(reg->base + reg->size - 1)); | |
1701 | else | |
1702 | seq_printf(m, "0x%016llx..0x%016llx\n", | |
1703 | (unsigned long long)reg->base, | |
1704 | (unsigned long long)(reg->base + reg->size - 1)); | |
1705 | ||
1706 | } | |
1707 | return 0; | |
1708 | } | |
1709 | ||
1710 | static int memblock_debug_open(struct inode *inode, struct file *file) | |
1711 | { | |
1712 | return single_open(file, memblock_debug_show, inode->i_private); | |
1713 | } | |
1714 | ||
1715 | static const struct file_operations memblock_debug_fops = { | |
1716 | .open = memblock_debug_open, | |
1717 | .read = seq_read, | |
1718 | .llseek = seq_lseek, | |
1719 | .release = single_release, | |
1720 | }; | |
1721 | ||
1722 | static int __init memblock_init_debugfs(void) | |
1723 | { | |
1724 | struct dentry *root = debugfs_create_dir("memblock", NULL); | |
1725 | if (!root) | |
1726 | return -ENXIO; | |
1727 | debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); | |
1728 | debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); | |
70210ed9 PH |
1729 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
1730 | debugfs_create_file("physmem", S_IRUGO, root, &memblock.physmem, &memblock_debug_fops); | |
1731 | #endif | |
6d03b885 BH |
1732 | |
1733 | return 0; | |
1734 | } | |
1735 | __initcall(memblock_init_debugfs); | |
1736 | ||
1737 | #endif /* CONFIG_DEBUG_FS */ |