blob: 2f55f19b7c86517bb5b23680c1b062f7efe2795a [file] [log] [blame]
Yinghai Lu95f72d12010-07-12 14:36:09 +10001/*
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>
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -070014#include <linux/slab.h>
Yinghai Lu95f72d12010-07-12 14:36:09 +100015#include <linux/init.h>
16#include <linux/bitops.h>
Benjamin Herrenschmidt449e8df2010-07-06 15:39:07 -070017#include <linux/poison.h>
Benjamin Herrenschmidtc196f762010-07-06 15:39:16 -070018#include <linux/pfn.h>
Benjamin Herrenschmidt6d03b882010-07-06 15:39:19 -070019#include <linux/debugfs.h>
20#include <linux/seq_file.h>
Yinghai Lu95f72d12010-07-12 14:36:09 +100021#include <linux/memblock.h>
22
Tejun Heofe091c22011-12-08 10:22:07 -080023static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock;
24static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock;
25
26struct memblock memblock __initdata_memblock = {
27 .memory.regions = memblock_memory_init_regions,
28 .memory.cnt = 1, /* empty dummy entry */
29 .memory.max = INIT_MEMBLOCK_REGIONS,
30
31 .reserved.regions = memblock_reserved_init_regions,
32 .reserved.cnt = 1, /* empty dummy entry */
33 .reserved.max = INIT_MEMBLOCK_REGIONS,
34
35 .current_limit = MEMBLOCK_ALLOC_ANYWHERE,
36};
Yinghai Lu95f72d12010-07-12 14:36:09 +100037
Yinghai Lu10d06432010-07-28 15:43:02 +100038int memblock_debug __initdata_memblock;
Tejun Heo1aadc052011-12-08 10:22:08 -080039static int memblock_can_resize __initdata_memblock;
Yinghai Lu95f72d12010-07-12 14:36:09 +100040
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -070041/* inline so we don't get a warning when pr_debug is compiled out */
42static inline const char *memblock_type_name(struct memblock_type *type)
43{
44 if (type == &memblock.memory)
45 return "memory";
46 else if (type == &memblock.reserved)
47 return "reserved";
48 else
49 return "unknown";
50}
51
Tejun Heoeb18f1b2011-12-08 10:22:07 -080052/* adjust *@size so that (@base + *@size) doesn't overflow, return new size */
53static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size)
54{
55 return *size = min(*size, (phys_addr_t)ULLONG_MAX - base);
56}
57
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +100058/*
59 * Address comparison utilities
60 */
Yinghai Lu10d06432010-07-28 15:43:02 +100061static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
Benjamin Herrenschmidt2898cc42010-08-04 13:34:42 +100062 phys_addr_t base2, phys_addr_t size2)
Yinghai Lu95f72d12010-07-12 14:36:09 +100063{
64 return ((base1 < (base2 + size2)) && (base2 < (base1 + size1)));
65}
66
H Hartley Sweeten2d7d3eb2011-10-31 17:09:15 -070067static long __init_memblock memblock_overlaps_region(struct memblock_type *type,
68 phys_addr_t base, phys_addr_t size)
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +100069{
70 unsigned long i;
71
72 for (i = 0; i < type->cnt; i++) {
73 phys_addr_t rgnbase = type->regions[i].base;
74 phys_addr_t rgnsize = type->regions[i].size;
75 if (memblock_addrs_overlap(base, size, rgnbase, rgnsize))
76 break;
77 }
78
79 return (i < type->cnt) ? i : -1;
80}
81
Tejun Heo7bd0b0f2011-12-08 10:22:09 -080082/**
83 * memblock_find_in_range_node - find free area in given range and node
84 * @start: start of candidate range
85 * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
86 * @size: size of free area to find
87 * @align: alignment of free area to find
88 * @nid: nid of the free area to find, %MAX_NUMNODES for any node
89 *
90 * Find @size free area aligned to @align in the specified range and node.
91 *
92 * RETURNS:
93 * Found address on success, %0 on failure.
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +100094 */
Tejun Heo7bd0b0f2011-12-08 10:22:09 -080095phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start,
96 phys_addr_t end, phys_addr_t size,
97 phys_addr_t align, int nid)
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +100098{
Tejun Heo7bd0b0f2011-12-08 10:22:09 -080099 phys_addr_t this_start, this_end, cand;
100 u64 i;
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000101
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800102 /* align @size to avoid excessive fragmentation on reserved array */
103 size = round_up(size, align);
Yinghai Luf1af98c2010-10-04 14:57:39 -0700104
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800105 /* pump up @end */
Benjamin Herrenschmidtfef501d2010-07-12 15:00:34 +1000106 if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
107 end = memblock.current_limit;
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000108
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800109 /* adjust @start to avoid underflow and allocating the first page */
110 start = max3(start, size, (phys_addr_t)PAGE_SIZE);
111 end = max(start, end);
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000112
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800113 for_each_free_mem_range_reverse(i, nid, &this_start, &this_end, NULL) {
114 this_start = clamp(this_start, start, end);
115 this_end = clamp(this_end, start, end);
116
117 cand = round_down(this_end - size, align);
118 if (cand >= this_start)
119 return cand;
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000120 }
Tejun Heo1f5026a2011-07-12 09:58:09 +0200121 return 0;
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000122}
123
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800124/**
125 * memblock_find_in_range - find free area in given range
126 * @start: start of candidate range
127 * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
128 * @size: size of free area to find
129 * @align: alignment of free area to find
130 *
131 * Find @size free area aligned to @align in the specified range.
132 *
133 * RETURNS:
134 * Found address on success, %0 on failure.
135 */
136phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start,
137 phys_addr_t end, phys_addr_t size,
138 phys_addr_t align)
139{
140 return memblock_find_in_range_node(start, end, size, align,
141 MAX_NUMNODES);
142}
143
Yinghai Lu5303b682010-07-28 15:38:40 +1000144/*
Yinghai Lu7950c402010-08-25 13:39:14 -0700145 * Free memblock.reserved.regions
146 */
147int __init_memblock memblock_free_reserved_regions(void)
148{
149 if (memblock.reserved.regions == memblock_reserved_init_regions)
150 return 0;
151
152 return memblock_free(__pa(memblock.reserved.regions),
153 sizeof(struct memblock_region) * memblock.reserved.max);
154}
155
156/*
157 * Reserve memblock.reserved.regions
158 */
159int __init_memblock memblock_reserve_reserved_regions(void)
160{
161 if (memblock.reserved.regions == memblock_reserved_init_regions)
162 return 0;
163
164 return memblock_reserve(__pa(memblock.reserved.regions),
165 sizeof(struct memblock_region) * memblock.reserved.max);
166}
167
Yinghai Lu10d06432010-07-28 15:43:02 +1000168static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000169{
Tejun Heo1440c4e2011-12-08 10:22:08 -0800170 type->total_size -= type->regions[r].size;
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200171 memmove(&type->regions[r], &type->regions[r + 1],
172 (type->cnt - (r + 1)) * sizeof(type->regions[r]));
Benjamin Herrenschmidte3239ff2010-08-04 14:06:41 +1000173 type->cnt--;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000174
Benjamin Herrenschmidt8f7a6602011-03-22 16:33:43 -0700175 /* Special case for empty arrays */
176 if (type->cnt == 0) {
Tejun Heo1440c4e2011-12-08 10:22:08 -0800177 WARN_ON(type->total_size != 0);
Benjamin Herrenschmidt8f7a6602011-03-22 16:33:43 -0700178 type->cnt = 1;
179 type->regions[0].base = 0;
180 type->regions[0].size = 0;
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200181 memblock_set_region_node(&type->regions[0], MAX_NUMNODES);
Benjamin Herrenschmidt8f7a6602011-03-22 16:33:43 -0700182 }
Yinghai Lu95f72d12010-07-12 14:36:09 +1000183}
184
Yinghai Lu10d06432010-07-28 15:43:02 +1000185static int __init_memblock memblock_double_array(struct memblock_type *type)
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -0700186{
187 struct memblock_region *new_array, *old_array;
188 phys_addr_t old_size, new_size, addr;
189 int use_slab = slab_is_available();
190
191 /* We don't allow resizing until we know about the reserved regions
192 * of memory that aren't suitable for allocation
193 */
194 if (!memblock_can_resize)
195 return -1;
196
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -0700197 /* Calculate new doubled size */
198 old_size = type->max * sizeof(struct memblock_region);
199 new_size = old_size << 1;
200
201 /* Try to find some space for it.
202 *
203 * WARNING: We assume that either slab_is_available() and we use it or
204 * we use MEMBLOCK for allocations. That means that this is unsafe to use
205 * when bootmem is currently active (unless bootmem itself is implemented
206 * on top of MEMBLOCK which isn't the case yet)
207 *
208 * This should however not be an issue for now, as we currently only
209 * call into MEMBLOCK while it's still active, or much later when slab is
210 * active for memory hotplug operations
211 */
212 if (use_slab) {
213 new_array = kmalloc(new_size, GFP_KERNEL);
Tejun Heo1f5026a2011-07-12 09:58:09 +0200214 addr = new_array ? __pa(new_array) : 0;
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -0700215 } else
Tejun Heofc769a82011-07-12 09:58:10 +0200216 addr = memblock_find_in_range(0, MEMBLOCK_ALLOC_ACCESSIBLE, new_size, sizeof(phys_addr_t));
Tejun Heo1f5026a2011-07-12 09:58:09 +0200217 if (!addr) {
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -0700218 pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n",
219 memblock_type_name(type), type->max, type->max * 2);
220 return -1;
221 }
222 new_array = __va(addr);
223
Yinghai Luea9e4372010-07-28 15:13:22 +1000224 memblock_dbg("memblock: %s array is doubled to %ld at [%#010llx-%#010llx]",
225 memblock_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size - 1);
226
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -0700227 /* Found space, we now need to move the array over before
228 * we add the reserved region since it may be our reserved
229 * array itself that is full.
230 */
231 memcpy(new_array, type->regions, old_size);
232 memset(new_array + type->max, 0, old_size);
233 old_array = type->regions;
234 type->regions = new_array;
235 type->max <<= 1;
236
237 /* If we use SLAB that's it, we are done */
238 if (use_slab)
239 return 0;
240
241 /* Add the new reserved region now. Should not fail ! */
Tejun Heo9c8c27e2011-12-08 10:22:06 -0800242 BUG_ON(memblock_reserve(addr, new_size));
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -0700243
244 /* If the array wasn't our static init one, then free it. We only do
245 * that before SLAB is available as later on, we don't know whether
246 * to use kfree or free_bootmem_pages(). Shouldn't be a big deal
247 * anyways
248 */
249 if (old_array != memblock_memory_init_regions &&
250 old_array != memblock_reserved_init_regions)
251 memblock_free(__pa(old_array), old_size);
252
253 return 0;
254}
255
Tejun Heo784656f2011-07-12 11:15:55 +0200256/**
257 * memblock_merge_regions - merge neighboring compatible regions
258 * @type: memblock type to scan
259 *
260 * Scan @type and merge neighboring compatible regions.
261 */
262static void __init_memblock memblock_merge_regions(struct memblock_type *type)
263{
264 int i = 0;
265
266 /* cnt never goes below 1 */
267 while (i < type->cnt - 1) {
268 struct memblock_region *this = &type->regions[i];
269 struct memblock_region *next = &type->regions[i + 1];
270
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200271 if (this->base + this->size != next->base ||
272 memblock_get_region_node(this) !=
273 memblock_get_region_node(next)) {
Tejun Heo784656f2011-07-12 11:15:55 +0200274 BUG_ON(this->base + this->size > next->base);
275 i++;
276 continue;
277 }
278
279 this->size += next->size;
280 memmove(next, next + 1, (type->cnt - (i + 1)) * sizeof(*next));
281 type->cnt--;
282 }
283}
284
285/**
286 * memblock_insert_region - insert new memblock region
287 * @type: memblock type to insert into
288 * @idx: index for the insertion point
289 * @base: base address of the new region
290 * @size: size of the new region
291 *
292 * Insert new memblock region [@base,@base+@size) into @type at @idx.
293 * @type must already have extra room to accomodate the new region.
294 */
295static void __init_memblock memblock_insert_region(struct memblock_type *type,
296 int idx, phys_addr_t base,
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200297 phys_addr_t size, int nid)
Tejun Heo784656f2011-07-12 11:15:55 +0200298{
299 struct memblock_region *rgn = &type->regions[idx];
300
301 BUG_ON(type->cnt >= type->max);
302 memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn));
303 rgn->base = base;
304 rgn->size = size;
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200305 memblock_set_region_node(rgn, nid);
Tejun Heo784656f2011-07-12 11:15:55 +0200306 type->cnt++;
Tejun Heo1440c4e2011-12-08 10:22:08 -0800307 type->total_size += size;
Tejun Heo784656f2011-07-12 11:15:55 +0200308}
309
310/**
311 * memblock_add_region - add new memblock region
312 * @type: memblock type to add new region into
313 * @base: base address of the new region
314 * @size: size of the new region
Tejun Heo7fb0bc32011-12-08 10:22:08 -0800315 * @nid: nid of the new region
Tejun Heo784656f2011-07-12 11:15:55 +0200316 *
317 * Add new memblock region [@base,@base+@size) into @type. The new region
318 * is allowed to overlap with existing ones - overlaps don't affect already
319 * existing regions. @type is guaranteed to be minimal (all neighbouring
320 * compatible regions are merged) after the addition.
321 *
322 * RETURNS:
323 * 0 on success, -errno on failure.
324 */
Tejun Heo581adcb2011-12-08 10:22:06 -0800325static int __init_memblock memblock_add_region(struct memblock_type *type,
Tejun Heo7fb0bc32011-12-08 10:22:08 -0800326 phys_addr_t base, phys_addr_t size, int nid)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000327{
Tejun Heo784656f2011-07-12 11:15:55 +0200328 bool insert = false;
Tejun Heoeb18f1b2011-12-08 10:22:07 -0800329 phys_addr_t obase = base;
330 phys_addr_t end = base + memblock_cap_size(base, &size);
Tejun Heo784656f2011-07-12 11:15:55 +0200331 int i, nr_new;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000332
Tejun Heo784656f2011-07-12 11:15:55 +0200333 /* special case for empty array */
334 if (type->regions[0].size == 0) {
Tejun Heo1440c4e2011-12-08 10:22:08 -0800335 WARN_ON(type->cnt != 1 || type->total_size);
Benjamin Herrenschmidte3239ff2010-08-04 14:06:41 +1000336 type->regions[0].base = base;
337 type->regions[0].size = size;
Tejun Heo7fb0bc32011-12-08 10:22:08 -0800338 memblock_set_region_node(&type->regions[0], nid);
Tejun Heo1440c4e2011-12-08 10:22:08 -0800339 type->total_size = size;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000340 return 0;
341 }
Tejun Heo784656f2011-07-12 11:15:55 +0200342repeat:
343 /*
344 * The following is executed twice. Once with %false @insert and
345 * then with %true. The first counts the number of regions needed
346 * to accomodate the new area. The second actually inserts them.
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -0700347 */
Tejun Heo784656f2011-07-12 11:15:55 +0200348 base = obase;
349 nr_new = 0;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000350
Tejun Heo784656f2011-07-12 11:15:55 +0200351 for (i = 0; i < type->cnt; i++) {
352 struct memblock_region *rgn = &type->regions[i];
353 phys_addr_t rbase = rgn->base;
354 phys_addr_t rend = rbase + rgn->size;
355
356 if (rbase >= end)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000357 break;
Tejun Heo784656f2011-07-12 11:15:55 +0200358 if (rend <= base)
359 continue;
360 /*
361 * @rgn overlaps. If it separates the lower part of new
362 * area, insert that portion.
363 */
364 if (rbase > base) {
365 nr_new++;
366 if (insert)
367 memblock_insert_region(type, i++, base,
Tejun Heo7fb0bc32011-12-08 10:22:08 -0800368 rbase - base, nid);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000369 }
Tejun Heo784656f2011-07-12 11:15:55 +0200370 /* area below @rend is dealt with, forget about it */
371 base = min(rend, end);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000372 }
Yinghai Lu95f72d12010-07-12 14:36:09 +1000373
Tejun Heo784656f2011-07-12 11:15:55 +0200374 /* insert the remaining portion */
375 if (base < end) {
376 nr_new++;
377 if (insert)
Tejun Heo7fb0bc32011-12-08 10:22:08 -0800378 memblock_insert_region(type, i, base, end - base, nid);
Tejun Heo784656f2011-07-12 11:15:55 +0200379 }
380
381 /*
382 * If this was the first round, resize array and repeat for actual
383 * insertions; otherwise, merge and return.
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -0700384 */
Tejun Heo784656f2011-07-12 11:15:55 +0200385 if (!insert) {
386 while (type->cnt + nr_new > type->max)
387 if (memblock_double_array(type) < 0)
388 return -ENOMEM;
389 insert = true;
390 goto repeat;
391 } else {
392 memblock_merge_regions(type);
393 return 0;
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -0700394 }
Yinghai Lu95f72d12010-07-12 14:36:09 +1000395}
396
Tejun Heo7fb0bc32011-12-08 10:22:08 -0800397int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size,
398 int nid)
399{
400 return memblock_add_region(&memblock.memory, base, size, nid);
401}
402
Tejun Heo581adcb2011-12-08 10:22:06 -0800403int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000404{
Tejun Heo7fb0bc32011-12-08 10:22:08 -0800405 return memblock_add_region(&memblock.memory, base, size, MAX_NUMNODES);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000406}
407
Tejun Heo6a9ceb32011-12-08 10:22:07 -0800408/**
409 * memblock_isolate_range - isolate given range into disjoint memblocks
410 * @type: memblock type to isolate range for
411 * @base: base of range to isolate
412 * @size: size of range to isolate
413 * @start_rgn: out parameter for the start of isolated region
414 * @end_rgn: out parameter for the end of isolated region
415 *
416 * Walk @type and ensure that regions don't cross the boundaries defined by
417 * [@base,@base+@size). Crossing regions are split at the boundaries,
418 * which may create at most two more regions. The index of the first
419 * region inside the range is returned in *@start_rgn and end in *@end_rgn.
420 *
421 * RETURNS:
422 * 0 on success, -errno on failure.
423 */
424static int __init_memblock memblock_isolate_range(struct memblock_type *type,
425 phys_addr_t base, phys_addr_t size,
426 int *start_rgn, int *end_rgn)
427{
Tejun Heoeb18f1b2011-12-08 10:22:07 -0800428 phys_addr_t end = base + memblock_cap_size(base, &size);
Tejun Heo6a9ceb32011-12-08 10:22:07 -0800429 int i;
430
431 *start_rgn = *end_rgn = 0;
432
433 /* we'll create at most two more regions */
434 while (type->cnt + 2 > type->max)
435 if (memblock_double_array(type) < 0)
436 return -ENOMEM;
437
438 for (i = 0; i < type->cnt; i++) {
439 struct memblock_region *rgn = &type->regions[i];
440 phys_addr_t rbase = rgn->base;
441 phys_addr_t rend = rbase + rgn->size;
442
443 if (rbase >= end)
444 break;
445 if (rend <= base)
446 continue;
447
448 if (rbase < base) {
449 /*
450 * @rgn intersects from below. Split and continue
451 * to process the next region - the new top half.
452 */
453 rgn->base = base;
Tejun Heo1440c4e2011-12-08 10:22:08 -0800454 rgn->size -= base - rbase;
455 type->total_size -= base - rbase;
Tejun Heo6a9ceb32011-12-08 10:22:07 -0800456 memblock_insert_region(type, i, rbase, base - rbase,
Tejun Heo71936182011-12-08 10:22:07 -0800457 memblock_get_region_node(rgn));
Tejun Heo6a9ceb32011-12-08 10:22:07 -0800458 } else if (rend > end) {
459 /*
460 * @rgn intersects from above. Split and redo the
461 * current region - the new bottom half.
462 */
463 rgn->base = end;
Tejun Heo1440c4e2011-12-08 10:22:08 -0800464 rgn->size -= end - rbase;
465 type->total_size -= end - rbase;
Tejun Heo6a9ceb32011-12-08 10:22:07 -0800466 memblock_insert_region(type, i--, rbase, end - rbase,
Tejun Heo71936182011-12-08 10:22:07 -0800467 memblock_get_region_node(rgn));
Tejun Heo6a9ceb32011-12-08 10:22:07 -0800468 } else {
469 /* @rgn is fully contained, record it */
470 if (!*end_rgn)
471 *start_rgn = i;
472 *end_rgn = i + 1;
473 }
474 }
475
476 return 0;
477}
Tejun Heo6a9ceb32011-12-08 10:22:07 -0800478
Tejun Heo581adcb2011-12-08 10:22:06 -0800479static int __init_memblock __memblock_remove(struct memblock_type *type,
480 phys_addr_t base, phys_addr_t size)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000481{
Tejun Heo71936182011-12-08 10:22:07 -0800482 int start_rgn, end_rgn;
483 int i, ret;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000484
Tejun Heo71936182011-12-08 10:22:07 -0800485 ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn);
486 if (ret)
487 return ret;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000488
Tejun Heo71936182011-12-08 10:22:07 -0800489 for (i = end_rgn - 1; i >= start_rgn; i--)
490 memblock_remove_region(type, i);
Benjamin Herrenschmidt8f7a6602011-03-22 16:33:43 -0700491 return 0;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000492}
493
Tejun Heo581adcb2011-12-08 10:22:06 -0800494int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000495{
496 return __memblock_remove(&memblock.memory, base, size);
497}
498
Tejun Heo581adcb2011-12-08 10:22:06 -0800499int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000500{
Tejun Heo24aa0782011-07-12 11:16:06 +0200501 memblock_dbg(" memblock_free: [%#016llx-%#016llx] %pF\n",
H. Peter Anvina1504392011-07-14 11:57:10 -0700502 (unsigned long long)base,
503 (unsigned long long)base + size,
504 (void *)_RET_IP_);
Tejun Heo24aa0782011-07-12 11:16:06 +0200505
Yinghai Lu95f72d12010-07-12 14:36:09 +1000506 return __memblock_remove(&memblock.reserved, base, size);
507}
508
Tejun Heo581adcb2011-12-08 10:22:06 -0800509int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000510{
Benjamin Herrenschmidte3239ff2010-08-04 14:06:41 +1000511 struct memblock_type *_rgn = &memblock.reserved;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000512
Tejun Heo24aa0782011-07-12 11:16:06 +0200513 memblock_dbg("memblock_reserve: [%#016llx-%#016llx] %pF\n",
H. Peter Anvina1504392011-07-14 11:57:10 -0700514 (unsigned long long)base,
515 (unsigned long long)base + size,
516 (void *)_RET_IP_);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000517 BUG_ON(0 == size);
518
Tejun Heo7fb0bc32011-12-08 10:22:08 -0800519 return memblock_add_region(_rgn, base, size, MAX_NUMNODES);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000520}
521
Tejun Heo35fd0802011-07-12 11:15:59 +0200522/**
523 * __next_free_mem_range - next function for for_each_free_mem_range()
524 * @idx: pointer to u64 loop variable
525 * @nid: nid: node selector, %MAX_NUMNODES for all nodes
526 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
527 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
528 * @p_nid: ptr to int for nid of the range, can be %NULL
529 *
530 * Find the first free area from *@idx which matches @nid, fill the out
531 * parameters, and update *@idx for the next iteration. The lower 32bit of
532 * *@idx contains index into memory region and the upper 32bit indexes the
533 * areas before each reserved region. For example, if reserved regions
534 * look like the following,
535 *
536 * 0:[0-16), 1:[32-48), 2:[128-130)
537 *
538 * The upper 32bit indexes the following regions.
539 *
540 * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX)
541 *
542 * As both region arrays are sorted, the function advances the two indices
543 * in lockstep and returns each intersection.
544 */
545void __init_memblock __next_free_mem_range(u64 *idx, int nid,
546 phys_addr_t *out_start,
547 phys_addr_t *out_end, int *out_nid)
548{
549 struct memblock_type *mem = &memblock.memory;
550 struct memblock_type *rsv = &memblock.reserved;
551 int mi = *idx & 0xffffffff;
552 int ri = *idx >> 32;
553
554 for ( ; mi < mem->cnt; mi++) {
555 struct memblock_region *m = &mem->regions[mi];
556 phys_addr_t m_start = m->base;
557 phys_addr_t m_end = m->base + m->size;
558
559 /* only memory regions are associated with nodes, check it */
560 if (nid != MAX_NUMNODES && nid != memblock_get_region_node(m))
561 continue;
562
563 /* scan areas before each reservation for intersection */
564 for ( ; ri < rsv->cnt + 1; ri++) {
565 struct memblock_region *r = &rsv->regions[ri];
566 phys_addr_t r_start = ri ? r[-1].base + r[-1].size : 0;
567 phys_addr_t r_end = ri < rsv->cnt ? r->base : ULLONG_MAX;
568
569 /* if ri advanced past mi, break out to advance mi */
570 if (r_start >= m_end)
571 break;
572 /* if the two regions intersect, we're done */
573 if (m_start < r_end) {
574 if (out_start)
575 *out_start = max(m_start, r_start);
576 if (out_end)
577 *out_end = min(m_end, r_end);
578 if (out_nid)
579 *out_nid = memblock_get_region_node(m);
580 /*
581 * The region which ends first is advanced
582 * for the next iteration.
583 */
584 if (m_end <= r_end)
585 mi++;
586 else
587 ri++;
588 *idx = (u32)mi | (u64)ri << 32;
589 return;
590 }
591 }
592 }
593
594 /* signal end of iteration */
595 *idx = ULLONG_MAX;
596}
597
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800598/**
599 * __next_free_mem_range_rev - next function for for_each_free_mem_range_reverse()
600 * @idx: pointer to u64 loop variable
601 * @nid: nid: node selector, %MAX_NUMNODES for all nodes
602 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
603 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
604 * @p_nid: ptr to int for nid of the range, can be %NULL
605 *
606 * Reverse of __next_free_mem_range().
607 */
608void __init_memblock __next_free_mem_range_rev(u64 *idx, int nid,
609 phys_addr_t *out_start,
610 phys_addr_t *out_end, int *out_nid)
611{
612 struct memblock_type *mem = &memblock.memory;
613 struct memblock_type *rsv = &memblock.reserved;
614 int mi = *idx & 0xffffffff;
615 int ri = *idx >> 32;
616
617 if (*idx == (u64)ULLONG_MAX) {
618 mi = mem->cnt - 1;
619 ri = rsv->cnt;
620 }
621
622 for ( ; mi >= 0; mi--) {
623 struct memblock_region *m = &mem->regions[mi];
624 phys_addr_t m_start = m->base;
625 phys_addr_t m_end = m->base + m->size;
626
627 /* only memory regions are associated with nodes, check it */
628 if (nid != MAX_NUMNODES && nid != memblock_get_region_node(m))
629 continue;
630
631 /* scan areas before each reservation for intersection */
632 for ( ; ri >= 0; ri--) {
633 struct memblock_region *r = &rsv->regions[ri];
634 phys_addr_t r_start = ri ? r[-1].base + r[-1].size : 0;
635 phys_addr_t r_end = ri < rsv->cnt ? r->base : ULLONG_MAX;
636
637 /* if ri advanced past mi, break out to advance mi */
638 if (r_end <= m_start)
639 break;
640 /* if the two regions intersect, we're done */
641 if (m_end > r_start) {
642 if (out_start)
643 *out_start = max(m_start, r_start);
644 if (out_end)
645 *out_end = min(m_end, r_end);
646 if (out_nid)
647 *out_nid = memblock_get_region_node(m);
648
649 if (m_start >= r_start)
650 mi--;
651 else
652 ri--;
653 *idx = (u32)mi | (u64)ri << 32;
654 return;
655 }
656 }
657 }
658
659 *idx = ULLONG_MAX;
660}
661
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200662#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
663/*
664 * Common iterator interface used to define for_each_mem_range().
665 */
666void __init_memblock __next_mem_pfn_range(int *idx, int nid,
667 unsigned long *out_start_pfn,
668 unsigned long *out_end_pfn, int *out_nid)
669{
670 struct memblock_type *type = &memblock.memory;
671 struct memblock_region *r;
672
673 while (++*idx < type->cnt) {
674 r = &type->regions[*idx];
675
676 if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size))
677 continue;
678 if (nid == MAX_NUMNODES || nid == r->nid)
679 break;
680 }
681 if (*idx >= type->cnt) {
682 *idx = -1;
683 return;
684 }
685
686 if (out_start_pfn)
687 *out_start_pfn = PFN_UP(r->base);
688 if (out_end_pfn)
689 *out_end_pfn = PFN_DOWN(r->base + r->size);
690 if (out_nid)
691 *out_nid = r->nid;
692}
693
694/**
695 * memblock_set_node - set node ID on memblock regions
696 * @base: base of area to set node ID for
697 * @size: size of area to set node ID for
698 * @nid: node ID to set
699 *
700 * Set the nid of memblock memory regions in [@base,@base+@size) to @nid.
701 * Regions which cross the area boundaries are split as necessary.
702 *
703 * RETURNS:
704 * 0 on success, -errno on failure.
705 */
706int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size,
707 int nid)
708{
709 struct memblock_type *type = &memblock.memory;
Tejun Heo6a9ceb32011-12-08 10:22:07 -0800710 int start_rgn, end_rgn;
711 int i, ret;
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200712
Tejun Heo6a9ceb32011-12-08 10:22:07 -0800713 ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn);
714 if (ret)
715 return ret;
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200716
Tejun Heo6a9ceb32011-12-08 10:22:07 -0800717 for (i = start_rgn; i < end_rgn; i++)
718 type->regions[i].nid = nid;
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200719
720 memblock_merge_regions(type);
721 return 0;
722}
723#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
724
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800725static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size,
726 phys_addr_t align, phys_addr_t max_addr,
727 int nid)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000728{
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000729 phys_addr_t found;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000730
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800731 found = memblock_find_in_range_node(0, max_addr, size, align, nid);
Tejun Heo9c8c27e2011-12-08 10:22:06 -0800732 if (found && !memblock_reserve(found, size))
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000733 return found;
734
735 return 0;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000736}
737
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800738phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid)
739{
740 return memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, nid);
741}
742
743phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr)
744{
745 return memblock_alloc_base_nid(size, align, max_addr, MAX_NUMNODES);
746}
747
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000748phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000749{
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000750 phys_addr_t alloc;
751
752 alloc = __memblock_alloc_base(size, align, max_addr);
753
754 if (alloc == 0)
755 panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n",
756 (unsigned long long) size, (unsigned long long) max_addr);
757
758 return alloc;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000759}
760
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000761phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000762{
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000763 return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000764}
765
Benjamin Herrenschmidt9d1e2492010-07-06 15:39:17 -0700766phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid)
767{
768 phys_addr_t res = memblock_alloc_nid(size, align, nid);
769
770 if (res)
771 return res;
Tejun Heo15fb0972011-07-12 09:58:07 +0200772 return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000773}
774
Benjamin Herrenschmidt9d1e2492010-07-06 15:39:17 -0700775
776/*
777 * Remaining API functions
778 */
779
Benjamin Herrenschmidt2898cc42010-08-04 13:34:42 +1000780phys_addr_t __init memblock_phys_mem_size(void)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000781{
Tejun Heo1440c4e2011-12-08 10:22:08 -0800782 return memblock.memory.total_size;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000783}
784
Sam Ravnborg0a93ebe2011-10-31 17:08:16 -0700785/* lowest address */
786phys_addr_t __init_memblock memblock_start_of_DRAM(void)
787{
788 return memblock.memory.regions[0].base;
789}
790
Yinghai Lu10d06432010-07-28 15:43:02 +1000791phys_addr_t __init_memblock memblock_end_of_DRAM(void)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000792{
793 int idx = memblock.memory.cnt - 1;
794
Benjamin Herrenschmidte3239ff2010-08-04 14:06:41 +1000795 return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000796}
797
Tejun Heoc0ce8fe2011-12-08 10:22:07 -0800798void __init memblock_enforce_memory_limit(phys_addr_t limit)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000799{
800 unsigned long i;
Tejun Heoc0ce8fe2011-12-08 10:22:07 -0800801 phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000802
Tejun Heoc0ce8fe2011-12-08 10:22:07 -0800803 if (!limit)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000804 return;
805
Tejun Heoc0ce8fe2011-12-08 10:22:07 -0800806 /* find out max address */
Yinghai Lu95f72d12010-07-12 14:36:09 +1000807 for (i = 0; i < memblock.memory.cnt; i++) {
Tejun Heoc0ce8fe2011-12-08 10:22:07 -0800808 struct memblock_region *r = &memblock.memory.regions[i];
Yinghai Lu95f72d12010-07-12 14:36:09 +1000809
Tejun Heoc0ce8fe2011-12-08 10:22:07 -0800810 if (limit <= r->size) {
811 max_addr = r->base + limit;
812 break;
813 }
814 limit -= r->size;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000815 }
816
Tejun Heoc0ce8fe2011-12-08 10:22:07 -0800817 /* truncate both memory and reserved regions */
818 __memblock_remove(&memblock.memory, max_addr, (phys_addr_t)ULLONG_MAX);
819 __memblock_remove(&memblock.reserved, max_addr, (phys_addr_t)ULLONG_MAX);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000820}
821
Yinghai Lucd794812010-10-11 12:34:09 -0700822static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr)
Benjamin Herrenschmidt72d4b0b2010-08-04 14:38:47 +1000823{
824 unsigned int left = 0, right = type->cnt;
825
826 do {
827 unsigned int mid = (right + left) / 2;
828
829 if (addr < type->regions[mid].base)
830 right = mid;
831 else if (addr >= (type->regions[mid].base +
832 type->regions[mid].size))
833 left = mid + 1;
834 else
835 return mid;
836 } while (left < right);
837 return -1;
838}
839
Benjamin Herrenschmidt2898cc42010-08-04 13:34:42 +1000840int __init memblock_is_reserved(phys_addr_t addr)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000841{
Benjamin Herrenschmidt72d4b0b2010-08-04 14:38:47 +1000842 return memblock_search(&memblock.reserved, addr) != -1;
843}
Yinghai Lu95f72d12010-07-12 14:36:09 +1000844
Yinghai Lu3661ca62010-09-15 13:05:29 -0700845int __init_memblock memblock_is_memory(phys_addr_t addr)
Benjamin Herrenschmidt72d4b0b2010-08-04 14:38:47 +1000846{
847 return memblock_search(&memblock.memory, addr) != -1;
848}
849
Yinghai Lu3661ca62010-09-15 13:05:29 -0700850int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size)
Benjamin Herrenschmidt72d4b0b2010-08-04 14:38:47 +1000851{
Tomi Valkeinenabb65272011-01-20 14:44:20 -0800852 int idx = memblock_search(&memblock.memory, base);
Tejun Heoeb18f1b2011-12-08 10:22:07 -0800853 phys_addr_t end = base + memblock_cap_size(base, &size);
Benjamin Herrenschmidt72d4b0b2010-08-04 14:38:47 +1000854
855 if (idx == -1)
856 return 0;
Tomi Valkeinenabb65272011-01-20 14:44:20 -0800857 return memblock.memory.regions[idx].base <= base &&
858 (memblock.memory.regions[idx].base +
Tejun Heoeb18f1b2011-12-08 10:22:07 -0800859 memblock.memory.regions[idx].size) >= end;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000860}
861
Yinghai Lu10d06432010-07-28 15:43:02 +1000862int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000863{
Tejun Heoeb18f1b2011-12-08 10:22:07 -0800864 memblock_cap_size(base, &size);
Benjamin Herrenschmidtf1c2c192010-08-04 14:17:17 +1000865 return memblock_overlaps_region(&memblock.reserved, base, size) >= 0;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000866}
867
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700868
Yinghai Lu3661ca62010-09-15 13:05:29 -0700869void __init_memblock memblock_set_current_limit(phys_addr_t limit)
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700870{
871 memblock.current_limit = limit;
872}
873
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200874static void __init_memblock memblock_dump(struct memblock_type *type, char *name)
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000875{
876 unsigned long long base, size;
877 int i;
878
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200879 pr_info(" %s.cnt = 0x%lx\n", name, type->cnt);
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000880
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200881 for (i = 0; i < type->cnt; i++) {
882 struct memblock_region *rgn = &type->regions[i];
883 char nid_buf[32] = "";
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000884
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200885 base = rgn->base;
886 size = rgn->size;
887#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
888 if (memblock_get_region_node(rgn) != MAX_NUMNODES)
889 snprintf(nid_buf, sizeof(nid_buf), " on node %d",
890 memblock_get_region_node(rgn));
891#endif
892 pr_info(" %s[%#x]\t[%#016llx-%#016llx], %#llx bytes%s\n",
893 name, i, base, base + size - 1, size, nid_buf);
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000894 }
895}
896
Tejun Heo4ff7b822011-12-08 10:22:06 -0800897void __init_memblock __memblock_dump_all(void)
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000898{
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000899 pr_info("MEMBLOCK configuration:\n");
Tejun Heo1440c4e2011-12-08 10:22:08 -0800900 pr_info(" memory size = %#llx reserved size = %#llx\n",
901 (unsigned long long)memblock.memory.total_size,
902 (unsigned long long)memblock.reserved.total_size);
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000903
904 memblock_dump(&memblock.memory, "memory");
905 memblock_dump(&memblock.reserved, "reserved");
906}
907
Tejun Heo1aadc052011-12-08 10:22:08 -0800908void __init memblock_allow_resize(void)
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000909{
Benjamin Herrenschmidt142b45a2010-07-06 15:39:13 -0700910 memblock_can_resize = 1;
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000911}
912
Benjamin Herrenschmidt6ed311b2010-07-12 14:36:48 +1000913static int __init early_memblock(char *p)
914{
915 if (p && strstr(p, "debug"))
916 memblock_debug = 1;
917 return 0;
918}
919early_param("memblock", early_memblock);
920
Tejun Heoc378ddd2011-07-14 11:46:03 +0200921#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK)
Benjamin Herrenschmidt6d03b882010-07-06 15:39:19 -0700922
923static int memblock_debug_show(struct seq_file *m, void *private)
924{
925 struct memblock_type *type = m->private;
926 struct memblock_region *reg;
927 int i;
928
929 for (i = 0; i < type->cnt; i++) {
930 reg = &type->regions[i];
931 seq_printf(m, "%4d: ", i);
932 if (sizeof(phys_addr_t) == 4)
933 seq_printf(m, "0x%08lx..0x%08lx\n",
934 (unsigned long)reg->base,
935 (unsigned long)(reg->base + reg->size - 1));
936 else
937 seq_printf(m, "0x%016llx..0x%016llx\n",
938 (unsigned long long)reg->base,
939 (unsigned long long)(reg->base + reg->size - 1));
940
941 }
942 return 0;
943}
944
945static int memblock_debug_open(struct inode *inode, struct file *file)
946{
947 return single_open(file, memblock_debug_show, inode->i_private);
948}
949
950static const struct file_operations memblock_debug_fops = {
951 .open = memblock_debug_open,
952 .read = seq_read,
953 .llseek = seq_lseek,
954 .release = single_release,
955};
956
957static int __init memblock_init_debugfs(void)
958{
959 struct dentry *root = debugfs_create_dir("memblock", NULL);
960 if (!root)
961 return -ENXIO;
962 debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops);
963 debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops);
964
965 return 0;
966}
967__initcall(memblock_init_debugfs);
968
969#endif /* CONFIG_DEBUG_FS */