195f72d1eSYinghai Lu /* 295f72d1eSYinghai Lu * Procedures for maintaining information about logical memory blocks. 395f72d1eSYinghai Lu * 495f72d1eSYinghai Lu * Peter Bergner, IBM Corp. June 2001. 595f72d1eSYinghai Lu * Copyright (C) 2001 Peter Bergner. 695f72d1eSYinghai Lu * 795f72d1eSYinghai Lu * This program is free software; you can redistribute it and/or 895f72d1eSYinghai Lu * modify it under the terms of the GNU General Public License 995f72d1eSYinghai Lu * as published by the Free Software Foundation; either version 1095f72d1eSYinghai Lu * 2 of the License, or (at your option) any later version. 1195f72d1eSYinghai Lu */ 1295f72d1eSYinghai Lu 1395f72d1eSYinghai Lu #include <linux/kernel.h> 14142b45a7SBenjamin Herrenschmidt #include <linux/slab.h> 1595f72d1eSYinghai Lu #include <linux/init.h> 1695f72d1eSYinghai Lu #include <linux/bitops.h> 17449e8df3SBenjamin Herrenschmidt #include <linux/poison.h> 18c196f76fSBenjamin Herrenschmidt #include <linux/pfn.h> 196d03b885SBenjamin Herrenschmidt #include <linux/debugfs.h> 206d03b885SBenjamin Herrenschmidt #include <linux/seq_file.h> 2195f72d1eSYinghai Lu #include <linux/memblock.h> 2295f72d1eSYinghai Lu 23fe091c20STejun Heo static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; 24fe091c20STejun Heo static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; 25fe091c20STejun Heo 26fe091c20STejun Heo struct memblock memblock __initdata_memblock = { 27fe091c20STejun Heo .memory.regions = memblock_memory_init_regions, 28fe091c20STejun Heo .memory.cnt = 1, /* empty dummy entry */ 29fe091c20STejun Heo .memory.max = INIT_MEMBLOCK_REGIONS, 30fe091c20STejun Heo 31fe091c20STejun Heo .reserved.regions = memblock_reserved_init_regions, 32fe091c20STejun Heo .reserved.cnt = 1, /* empty dummy entry */ 33fe091c20STejun Heo .reserved.max = INIT_MEMBLOCK_REGIONS, 34fe091c20STejun Heo 35fe091c20STejun Heo .current_limit = MEMBLOCK_ALLOC_ANYWHERE, 36fe091c20STejun Heo }; 3795f72d1eSYinghai Lu 3810d06439SYinghai Lu int memblock_debug __initdata_memblock; 391aadc056STejun Heo static int memblock_can_resize __initdata_memblock; 4095f72d1eSYinghai Lu 41142b45a7SBenjamin Herrenschmidt /* inline so we don't get a warning when pr_debug is compiled out */ 42142b45a7SBenjamin Herrenschmidt static inline const char *memblock_type_name(struct memblock_type *type) 43142b45a7SBenjamin Herrenschmidt { 44142b45a7SBenjamin Herrenschmidt if (type == &memblock.memory) 45142b45a7SBenjamin Herrenschmidt return "memory"; 46142b45a7SBenjamin Herrenschmidt else if (type == &memblock.reserved) 47142b45a7SBenjamin Herrenschmidt return "reserved"; 48142b45a7SBenjamin Herrenschmidt else 49142b45a7SBenjamin Herrenschmidt return "unknown"; 50142b45a7SBenjamin Herrenschmidt } 51142b45a7SBenjamin Herrenschmidt 52eb18f1b5STejun Heo /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ 53eb18f1b5STejun Heo static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) 54eb18f1b5STejun Heo { 55eb18f1b5STejun Heo return *size = min(*size, (phys_addr_t)ULLONG_MAX - base); 56eb18f1b5STejun Heo } 57eb18f1b5STejun Heo 586ed311b2SBenjamin Herrenschmidt /* 596ed311b2SBenjamin Herrenschmidt * Address comparison utilities 606ed311b2SBenjamin Herrenschmidt */ 6110d06439SYinghai Lu static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, 622898cc4cSBenjamin Herrenschmidt phys_addr_t base2, phys_addr_t size2) 6395f72d1eSYinghai Lu { 6495f72d1eSYinghai Lu return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); 6595f72d1eSYinghai Lu } 6695f72d1eSYinghai Lu 672d7d3eb2SH Hartley Sweeten static long __init_memblock memblock_overlaps_region(struct memblock_type *type, 682d7d3eb2SH Hartley Sweeten phys_addr_t base, phys_addr_t size) 696ed311b2SBenjamin Herrenschmidt { 706ed311b2SBenjamin Herrenschmidt unsigned long i; 716ed311b2SBenjamin Herrenschmidt 726ed311b2SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 736ed311b2SBenjamin Herrenschmidt phys_addr_t rgnbase = type->regions[i].base; 746ed311b2SBenjamin Herrenschmidt phys_addr_t rgnsize = type->regions[i].size; 756ed311b2SBenjamin Herrenschmidt if (memblock_addrs_overlap(base, size, rgnbase, rgnsize)) 766ed311b2SBenjamin Herrenschmidt break; 776ed311b2SBenjamin Herrenschmidt } 786ed311b2SBenjamin Herrenschmidt 796ed311b2SBenjamin Herrenschmidt return (i < type->cnt) ? i : -1; 806ed311b2SBenjamin Herrenschmidt } 816ed311b2SBenjamin Herrenschmidt 826ed311b2SBenjamin Herrenschmidt /* 836ed311b2SBenjamin Herrenschmidt * Find, allocate, deallocate or reserve unreserved regions. All allocations 846ed311b2SBenjamin Herrenschmidt * are top-down. 856ed311b2SBenjamin Herrenschmidt */ 866ed311b2SBenjamin Herrenschmidt 87cd79481dSYinghai Lu static phys_addr_t __init_memblock memblock_find_region(phys_addr_t start, phys_addr_t end, 886ed311b2SBenjamin Herrenschmidt phys_addr_t size, phys_addr_t align) 896ed311b2SBenjamin Herrenschmidt { 906ed311b2SBenjamin Herrenschmidt phys_addr_t base, res_base; 916ed311b2SBenjamin Herrenschmidt long j; 926ed311b2SBenjamin Herrenschmidt 93f1af98c7SYinghai Lu /* In case, huge size is requested */ 94f1af98c7SYinghai Lu if (end < size) 951f5026a7STejun Heo return 0; 96f1af98c7SYinghai Lu 97348968ebSTejun Heo base = round_down(end - size, align); 98f1af98c7SYinghai Lu 9925818f0fSBenjamin Herrenschmidt /* Prevent allocations returning 0 as it's also used to 10025818f0fSBenjamin Herrenschmidt * indicate an allocation failure 10125818f0fSBenjamin Herrenschmidt */ 10225818f0fSBenjamin Herrenschmidt if (start == 0) 10325818f0fSBenjamin Herrenschmidt start = PAGE_SIZE; 10425818f0fSBenjamin Herrenschmidt 1056ed311b2SBenjamin Herrenschmidt while (start <= base) { 1066ed311b2SBenjamin Herrenschmidt j = memblock_overlaps_region(&memblock.reserved, base, size); 1076ed311b2SBenjamin Herrenschmidt if (j < 0) 1086ed311b2SBenjamin Herrenschmidt return base; 1096ed311b2SBenjamin Herrenschmidt res_base = memblock.reserved.regions[j].base; 1106ed311b2SBenjamin Herrenschmidt if (res_base < size) 1116ed311b2SBenjamin Herrenschmidt break; 112348968ebSTejun Heo base = round_down(res_base - size, align); 1136ed311b2SBenjamin Herrenschmidt } 1146ed311b2SBenjamin Herrenschmidt 1151f5026a7STejun Heo return 0; 1166ed311b2SBenjamin Herrenschmidt } 1176ed311b2SBenjamin Herrenschmidt 118fc769a8eSTejun Heo /* 119fc769a8eSTejun Heo * Find a free area with specified alignment in a specific range. 120fc769a8eSTejun Heo */ 121fc769a8eSTejun Heo phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, phys_addr_t end, 122fc769a8eSTejun Heo phys_addr_t size, phys_addr_t align) 1236ed311b2SBenjamin Herrenschmidt { 1246ed311b2SBenjamin Herrenschmidt long i; 1256ed311b2SBenjamin Herrenschmidt 1266ed311b2SBenjamin Herrenschmidt BUG_ON(0 == size); 1276ed311b2SBenjamin Herrenschmidt 1286ed311b2SBenjamin Herrenschmidt /* Pump up max_addr */ 129fef501d4SBenjamin Herrenschmidt if (end == MEMBLOCK_ALLOC_ACCESSIBLE) 130fef501d4SBenjamin Herrenschmidt end = memblock.current_limit; 1316ed311b2SBenjamin Herrenschmidt 1326ed311b2SBenjamin Herrenschmidt /* We do a top-down search, this tends to limit memory 1336ed311b2SBenjamin Herrenschmidt * fragmentation by keeping early boot allocs near the 1346ed311b2SBenjamin Herrenschmidt * top of memory 1356ed311b2SBenjamin Herrenschmidt */ 1366ed311b2SBenjamin Herrenschmidt for (i = memblock.memory.cnt - 1; i >= 0; i--) { 1376ed311b2SBenjamin Herrenschmidt phys_addr_t memblockbase = memblock.memory.regions[i].base; 1386ed311b2SBenjamin Herrenschmidt phys_addr_t memblocksize = memblock.memory.regions[i].size; 139fef501d4SBenjamin Herrenschmidt phys_addr_t bottom, top, found; 1406ed311b2SBenjamin Herrenschmidt 1416ed311b2SBenjamin Herrenschmidt if (memblocksize < size) 1426ed311b2SBenjamin Herrenschmidt continue; 143fef501d4SBenjamin Herrenschmidt if ((memblockbase + memblocksize) <= start) 144fef501d4SBenjamin Herrenschmidt break; 145fef501d4SBenjamin Herrenschmidt bottom = max(memblockbase, start); 146fef501d4SBenjamin Herrenschmidt top = min(memblockbase + memblocksize, end); 147fef501d4SBenjamin Herrenschmidt if (bottom >= top) 148fef501d4SBenjamin Herrenschmidt continue; 149fef501d4SBenjamin Herrenschmidt found = memblock_find_region(bottom, top, size, align); 1501f5026a7STejun Heo if (found) 151fef501d4SBenjamin Herrenschmidt return found; 1526ed311b2SBenjamin Herrenschmidt } 1531f5026a7STejun Heo return 0; 1546ed311b2SBenjamin Herrenschmidt } 1556ed311b2SBenjamin Herrenschmidt 1565303b68fSYinghai Lu /* 1577950c407SYinghai Lu * Free memblock.reserved.regions 1587950c407SYinghai Lu */ 1597950c407SYinghai Lu int __init_memblock memblock_free_reserved_regions(void) 1607950c407SYinghai Lu { 1617950c407SYinghai Lu if (memblock.reserved.regions == memblock_reserved_init_regions) 1627950c407SYinghai Lu return 0; 1637950c407SYinghai Lu 1647950c407SYinghai Lu return memblock_free(__pa(memblock.reserved.regions), 1657950c407SYinghai Lu sizeof(struct memblock_region) * memblock.reserved.max); 1667950c407SYinghai Lu } 1677950c407SYinghai Lu 1687950c407SYinghai Lu /* 1697950c407SYinghai Lu * Reserve memblock.reserved.regions 1707950c407SYinghai Lu */ 1717950c407SYinghai Lu int __init_memblock memblock_reserve_reserved_regions(void) 1727950c407SYinghai Lu { 1737950c407SYinghai Lu if (memblock.reserved.regions == memblock_reserved_init_regions) 1747950c407SYinghai Lu return 0; 1757950c407SYinghai Lu 1767950c407SYinghai Lu return memblock_reserve(__pa(memblock.reserved.regions), 1777950c407SYinghai Lu sizeof(struct memblock_region) * memblock.reserved.max); 1787950c407SYinghai Lu } 1797950c407SYinghai Lu 18010d06439SYinghai Lu static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) 18195f72d1eSYinghai Lu { 1821440c4e2STejun Heo type->total_size -= type->regions[r].size; 1837c0caeb8STejun Heo memmove(&type->regions[r], &type->regions[r + 1], 1847c0caeb8STejun Heo (type->cnt - (r + 1)) * sizeof(type->regions[r])); 185e3239ff9SBenjamin Herrenschmidt type->cnt--; 18695f72d1eSYinghai Lu 1878f7a6605SBenjamin Herrenschmidt /* Special case for empty arrays */ 1888f7a6605SBenjamin Herrenschmidt if (type->cnt == 0) { 1891440c4e2STejun Heo WARN_ON(type->total_size != 0); 1908f7a6605SBenjamin Herrenschmidt type->cnt = 1; 1918f7a6605SBenjamin Herrenschmidt type->regions[0].base = 0; 1928f7a6605SBenjamin Herrenschmidt type->regions[0].size = 0; 1937c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 1948f7a6605SBenjamin Herrenschmidt } 19595f72d1eSYinghai Lu } 19695f72d1eSYinghai Lu 19710d06439SYinghai Lu static int __init_memblock memblock_double_array(struct memblock_type *type) 198142b45a7SBenjamin Herrenschmidt { 199142b45a7SBenjamin Herrenschmidt struct memblock_region *new_array, *old_array; 200142b45a7SBenjamin Herrenschmidt phys_addr_t old_size, new_size, addr; 201142b45a7SBenjamin Herrenschmidt int use_slab = slab_is_available(); 202142b45a7SBenjamin Herrenschmidt 203142b45a7SBenjamin Herrenschmidt /* We don't allow resizing until we know about the reserved regions 204142b45a7SBenjamin Herrenschmidt * of memory that aren't suitable for allocation 205142b45a7SBenjamin Herrenschmidt */ 206142b45a7SBenjamin Herrenschmidt if (!memblock_can_resize) 207142b45a7SBenjamin Herrenschmidt return -1; 208142b45a7SBenjamin Herrenschmidt 209142b45a7SBenjamin Herrenschmidt /* Calculate new doubled size */ 210142b45a7SBenjamin Herrenschmidt old_size = type->max * sizeof(struct memblock_region); 211142b45a7SBenjamin Herrenschmidt new_size = old_size << 1; 212142b45a7SBenjamin Herrenschmidt 213142b45a7SBenjamin Herrenschmidt /* Try to find some space for it. 214142b45a7SBenjamin Herrenschmidt * 215142b45a7SBenjamin Herrenschmidt * WARNING: We assume that either slab_is_available() and we use it or 216142b45a7SBenjamin Herrenschmidt * we use MEMBLOCK for allocations. That means that this is unsafe to use 217142b45a7SBenjamin Herrenschmidt * when bootmem is currently active (unless bootmem itself is implemented 218142b45a7SBenjamin Herrenschmidt * on top of MEMBLOCK which isn't the case yet) 219142b45a7SBenjamin Herrenschmidt * 220142b45a7SBenjamin Herrenschmidt * This should however not be an issue for now, as we currently only 221142b45a7SBenjamin Herrenschmidt * call into MEMBLOCK while it's still active, or much later when slab is 222142b45a7SBenjamin Herrenschmidt * active for memory hotplug operations 223142b45a7SBenjamin Herrenschmidt */ 224142b45a7SBenjamin Herrenschmidt if (use_slab) { 225142b45a7SBenjamin Herrenschmidt new_array = kmalloc(new_size, GFP_KERNEL); 2261f5026a7STejun Heo addr = new_array ? __pa(new_array) : 0; 227142b45a7SBenjamin Herrenschmidt } else 228fc769a8eSTejun Heo addr = memblock_find_in_range(0, MEMBLOCK_ALLOC_ACCESSIBLE, new_size, sizeof(phys_addr_t)); 2291f5026a7STejun Heo if (!addr) { 230142b45a7SBenjamin Herrenschmidt pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", 231142b45a7SBenjamin Herrenschmidt memblock_type_name(type), type->max, type->max * 2); 232142b45a7SBenjamin Herrenschmidt return -1; 233142b45a7SBenjamin Herrenschmidt } 234142b45a7SBenjamin Herrenschmidt new_array = __va(addr); 235142b45a7SBenjamin Herrenschmidt 236ea9e4376SYinghai Lu memblock_dbg("memblock: %s array is doubled to %ld at [%#010llx-%#010llx]", 237ea9e4376SYinghai Lu memblock_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size - 1); 238ea9e4376SYinghai Lu 239142b45a7SBenjamin Herrenschmidt /* Found space, we now need to move the array over before 240142b45a7SBenjamin Herrenschmidt * we add the reserved region since it may be our reserved 241142b45a7SBenjamin Herrenschmidt * array itself that is full. 242142b45a7SBenjamin Herrenschmidt */ 243142b45a7SBenjamin Herrenschmidt memcpy(new_array, type->regions, old_size); 244142b45a7SBenjamin Herrenschmidt memset(new_array + type->max, 0, old_size); 245142b45a7SBenjamin Herrenschmidt old_array = type->regions; 246142b45a7SBenjamin Herrenschmidt type->regions = new_array; 247142b45a7SBenjamin Herrenschmidt type->max <<= 1; 248142b45a7SBenjamin Herrenschmidt 249142b45a7SBenjamin Herrenschmidt /* If we use SLAB that's it, we are done */ 250142b45a7SBenjamin Herrenschmidt if (use_slab) 251142b45a7SBenjamin Herrenschmidt return 0; 252142b45a7SBenjamin Herrenschmidt 253142b45a7SBenjamin Herrenschmidt /* Add the new reserved region now. Should not fail ! */ 2549c8c27e2STejun Heo BUG_ON(memblock_reserve(addr, new_size)); 255142b45a7SBenjamin Herrenschmidt 256142b45a7SBenjamin Herrenschmidt /* If the array wasn't our static init one, then free it. We only do 257142b45a7SBenjamin Herrenschmidt * that before SLAB is available as later on, we don't know whether 258142b45a7SBenjamin Herrenschmidt * to use kfree or free_bootmem_pages(). Shouldn't be a big deal 259142b45a7SBenjamin Herrenschmidt * anyways 260142b45a7SBenjamin Herrenschmidt */ 261142b45a7SBenjamin Herrenschmidt if (old_array != memblock_memory_init_regions && 262142b45a7SBenjamin Herrenschmidt old_array != memblock_reserved_init_regions) 263142b45a7SBenjamin Herrenschmidt memblock_free(__pa(old_array), old_size); 264142b45a7SBenjamin Herrenschmidt 265142b45a7SBenjamin Herrenschmidt return 0; 266142b45a7SBenjamin Herrenschmidt } 267142b45a7SBenjamin Herrenschmidt 268784656f9STejun Heo /** 269784656f9STejun Heo * memblock_merge_regions - merge neighboring compatible regions 270784656f9STejun Heo * @type: memblock type to scan 271784656f9STejun Heo * 272784656f9STejun Heo * Scan @type and merge neighboring compatible regions. 273784656f9STejun Heo */ 274784656f9STejun Heo static void __init_memblock memblock_merge_regions(struct memblock_type *type) 275784656f9STejun Heo { 276784656f9STejun Heo int i = 0; 277784656f9STejun Heo 278784656f9STejun Heo /* cnt never goes below 1 */ 279784656f9STejun Heo while (i < type->cnt - 1) { 280784656f9STejun Heo struct memblock_region *this = &type->regions[i]; 281784656f9STejun Heo struct memblock_region *next = &type->regions[i + 1]; 282784656f9STejun Heo 2837c0caeb8STejun Heo if (this->base + this->size != next->base || 2847c0caeb8STejun Heo memblock_get_region_node(this) != 2857c0caeb8STejun Heo memblock_get_region_node(next)) { 286784656f9STejun Heo BUG_ON(this->base + this->size > next->base); 287784656f9STejun Heo i++; 288784656f9STejun Heo continue; 289784656f9STejun Heo } 290784656f9STejun Heo 291784656f9STejun Heo this->size += next->size; 292784656f9STejun Heo memmove(next, next + 1, (type->cnt - (i + 1)) * sizeof(*next)); 293784656f9STejun Heo type->cnt--; 294784656f9STejun Heo } 295784656f9STejun Heo } 296784656f9STejun Heo 297784656f9STejun Heo /** 298784656f9STejun Heo * memblock_insert_region - insert new memblock region 299784656f9STejun Heo * @type: memblock type to insert into 300784656f9STejun Heo * @idx: index for the insertion point 301784656f9STejun Heo * @base: base address of the new region 302784656f9STejun Heo * @size: size of the new region 303784656f9STejun Heo * 304784656f9STejun Heo * Insert new memblock region [@base,@base+@size) into @type at @idx. 305784656f9STejun Heo * @type must already have extra room to accomodate the new region. 306784656f9STejun Heo */ 307784656f9STejun Heo static void __init_memblock memblock_insert_region(struct memblock_type *type, 308784656f9STejun Heo int idx, phys_addr_t base, 3097c0caeb8STejun Heo phys_addr_t size, int nid) 310784656f9STejun Heo { 311784656f9STejun Heo struct memblock_region *rgn = &type->regions[idx]; 312784656f9STejun Heo 313784656f9STejun Heo BUG_ON(type->cnt >= type->max); 314784656f9STejun Heo memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); 315784656f9STejun Heo rgn->base = base; 316784656f9STejun Heo rgn->size = size; 3177c0caeb8STejun Heo memblock_set_region_node(rgn, nid); 318784656f9STejun Heo type->cnt++; 3191440c4e2STejun Heo type->total_size += size; 320784656f9STejun Heo } 321784656f9STejun Heo 322784656f9STejun Heo /** 323784656f9STejun Heo * memblock_add_region - add new memblock region 324784656f9STejun Heo * @type: memblock type to add new region into 325784656f9STejun Heo * @base: base address of the new region 326784656f9STejun Heo * @size: size of the new region 327*7fb0bc3fSTejun Heo * @nid: nid of the new region 328784656f9STejun Heo * 329784656f9STejun Heo * Add new memblock region [@base,@base+@size) into @type. The new region 330784656f9STejun Heo * is allowed to overlap with existing ones - overlaps don't affect already 331784656f9STejun Heo * existing regions. @type is guaranteed to be minimal (all neighbouring 332784656f9STejun Heo * compatible regions are merged) after the addition. 333784656f9STejun Heo * 334784656f9STejun Heo * RETURNS: 335784656f9STejun Heo * 0 on success, -errno on failure. 336784656f9STejun Heo */ 337581adcbeSTejun Heo static int __init_memblock memblock_add_region(struct memblock_type *type, 338*7fb0bc3fSTejun Heo phys_addr_t base, phys_addr_t size, int nid) 33995f72d1eSYinghai Lu { 340784656f9STejun Heo bool insert = false; 341eb18f1b5STejun Heo phys_addr_t obase = base; 342eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 343784656f9STejun Heo int i, nr_new; 34495f72d1eSYinghai Lu 345784656f9STejun Heo /* special case for empty array */ 346784656f9STejun Heo if (type->regions[0].size == 0) { 3471440c4e2STejun Heo WARN_ON(type->cnt != 1 || type->total_size); 348784656f9STejun Heo type->regions[0].base = base; 349784656f9STejun Heo type->regions[0].size = size; 350*7fb0bc3fSTejun Heo memblock_set_region_node(&type->regions[0], nid); 3511440c4e2STejun Heo type->total_size = size; 352784656f9STejun Heo return 0; 353784656f9STejun Heo } 354784656f9STejun Heo repeat: 355784656f9STejun Heo /* 356784656f9STejun Heo * The following is executed twice. Once with %false @insert and 357784656f9STejun Heo * then with %true. The first counts the number of regions needed 358784656f9STejun Heo * to accomodate the new area. The second actually inserts them. 359784656f9STejun Heo */ 360784656f9STejun Heo base = obase; 361784656f9STejun Heo nr_new = 0; 362784656f9STejun Heo 3638f7a6605SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 3648f7a6605SBenjamin Herrenschmidt struct memblock_region *rgn = &type->regions[i]; 365784656f9STejun Heo phys_addr_t rbase = rgn->base; 366784656f9STejun Heo phys_addr_t rend = rbase + rgn->size; 3678f7a6605SBenjamin Herrenschmidt 368784656f9STejun Heo if (rbase >= end) 3698f7a6605SBenjamin Herrenschmidt break; 370784656f9STejun Heo if (rend <= base) 371784656f9STejun Heo continue; 372784656f9STejun Heo /* 373784656f9STejun Heo * @rgn overlaps. If it separates the lower part of new 374784656f9STejun Heo * area, insert that portion. 3758f7a6605SBenjamin Herrenschmidt */ 376784656f9STejun Heo if (rbase > base) { 377784656f9STejun Heo nr_new++; 378784656f9STejun Heo if (insert) 379784656f9STejun Heo memblock_insert_region(type, i++, base, 380*7fb0bc3fSTejun Heo rbase - base, nid); 381784656f9STejun Heo } 382784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 383784656f9STejun Heo base = min(rend, end); 3848f7a6605SBenjamin Herrenschmidt } 3858f7a6605SBenjamin Herrenschmidt 386784656f9STejun Heo /* insert the remaining portion */ 387784656f9STejun Heo if (base < end) { 388784656f9STejun Heo nr_new++; 389784656f9STejun Heo if (insert) 390*7fb0bc3fSTejun Heo memblock_insert_region(type, i, base, end - base, nid); 3918f7a6605SBenjamin Herrenschmidt } 3928f7a6605SBenjamin Herrenschmidt 393784656f9STejun Heo /* 394784656f9STejun Heo * If this was the first round, resize array and repeat for actual 395784656f9STejun Heo * insertions; otherwise, merge and return. 3968f7a6605SBenjamin Herrenschmidt */ 397784656f9STejun Heo if (!insert) { 398784656f9STejun Heo while (type->cnt + nr_new > type->max) 399784656f9STejun Heo if (memblock_double_array(type) < 0) 400784656f9STejun Heo return -ENOMEM; 401784656f9STejun Heo insert = true; 402784656f9STejun Heo goto repeat; 40395f72d1eSYinghai Lu } else { 404784656f9STejun Heo memblock_merge_regions(type); 40595f72d1eSYinghai Lu return 0; 40695f72d1eSYinghai Lu } 407784656f9STejun Heo } 40895f72d1eSYinghai Lu 409*7fb0bc3fSTejun Heo int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, 410*7fb0bc3fSTejun Heo int nid) 411*7fb0bc3fSTejun Heo { 412*7fb0bc3fSTejun Heo return memblock_add_region(&memblock.memory, base, size, nid); 413*7fb0bc3fSTejun Heo } 414*7fb0bc3fSTejun Heo 415581adcbeSTejun Heo int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 41695f72d1eSYinghai Lu { 417*7fb0bc3fSTejun Heo return memblock_add_region(&memblock.memory, base, size, MAX_NUMNODES); 41895f72d1eSYinghai Lu } 41995f72d1eSYinghai Lu 4206a9ceb31STejun Heo /** 4216a9ceb31STejun Heo * memblock_isolate_range - isolate given range into disjoint memblocks 4226a9ceb31STejun Heo * @type: memblock type to isolate range for 4236a9ceb31STejun Heo * @base: base of range to isolate 4246a9ceb31STejun Heo * @size: size of range to isolate 4256a9ceb31STejun Heo * @start_rgn: out parameter for the start of isolated region 4266a9ceb31STejun Heo * @end_rgn: out parameter for the end of isolated region 4276a9ceb31STejun Heo * 4286a9ceb31STejun Heo * Walk @type and ensure that regions don't cross the boundaries defined by 4296a9ceb31STejun Heo * [@base,@base+@size). Crossing regions are split at the boundaries, 4306a9ceb31STejun Heo * which may create at most two more regions. The index of the first 4316a9ceb31STejun Heo * region inside the range is returned in *@start_rgn and end in *@end_rgn. 4326a9ceb31STejun Heo * 4336a9ceb31STejun Heo * RETURNS: 4346a9ceb31STejun Heo * 0 on success, -errno on failure. 4356a9ceb31STejun Heo */ 4366a9ceb31STejun Heo static int __init_memblock memblock_isolate_range(struct memblock_type *type, 4376a9ceb31STejun Heo phys_addr_t base, phys_addr_t size, 4386a9ceb31STejun Heo int *start_rgn, int *end_rgn) 4396a9ceb31STejun Heo { 440eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 4416a9ceb31STejun Heo int i; 4426a9ceb31STejun Heo 4436a9ceb31STejun Heo *start_rgn = *end_rgn = 0; 4446a9ceb31STejun Heo 4456a9ceb31STejun Heo /* we'll create at most two more regions */ 4466a9ceb31STejun Heo while (type->cnt + 2 > type->max) 4476a9ceb31STejun Heo if (memblock_double_array(type) < 0) 4486a9ceb31STejun Heo return -ENOMEM; 4496a9ceb31STejun Heo 4506a9ceb31STejun Heo for (i = 0; i < type->cnt; i++) { 4516a9ceb31STejun Heo struct memblock_region *rgn = &type->regions[i]; 4526a9ceb31STejun Heo phys_addr_t rbase = rgn->base; 4536a9ceb31STejun Heo phys_addr_t rend = rbase + rgn->size; 4546a9ceb31STejun Heo 4556a9ceb31STejun Heo if (rbase >= end) 4566a9ceb31STejun Heo break; 4576a9ceb31STejun Heo if (rend <= base) 4586a9ceb31STejun Heo continue; 4596a9ceb31STejun Heo 4606a9ceb31STejun Heo if (rbase < base) { 4616a9ceb31STejun Heo /* 4626a9ceb31STejun Heo * @rgn intersects from below. Split and continue 4636a9ceb31STejun Heo * to process the next region - the new top half. 4646a9ceb31STejun Heo */ 4656a9ceb31STejun Heo rgn->base = base; 4661440c4e2STejun Heo rgn->size -= base - rbase; 4671440c4e2STejun Heo type->total_size -= base - rbase; 4686a9ceb31STejun Heo memblock_insert_region(type, i, rbase, base - rbase, 46971936180STejun Heo memblock_get_region_node(rgn)); 4706a9ceb31STejun Heo } else if (rend > end) { 4716a9ceb31STejun Heo /* 4726a9ceb31STejun Heo * @rgn intersects from above. Split and redo the 4736a9ceb31STejun Heo * current region - the new bottom half. 4746a9ceb31STejun Heo */ 4756a9ceb31STejun Heo rgn->base = end; 4761440c4e2STejun Heo rgn->size -= end - rbase; 4771440c4e2STejun Heo type->total_size -= end - rbase; 4786a9ceb31STejun Heo memblock_insert_region(type, i--, rbase, end - rbase, 47971936180STejun Heo memblock_get_region_node(rgn)); 4806a9ceb31STejun Heo } else { 4816a9ceb31STejun Heo /* @rgn is fully contained, record it */ 4826a9ceb31STejun Heo if (!*end_rgn) 4836a9ceb31STejun Heo *start_rgn = i; 4846a9ceb31STejun Heo *end_rgn = i + 1; 4856a9ceb31STejun Heo } 4866a9ceb31STejun Heo } 4876a9ceb31STejun Heo 4886a9ceb31STejun Heo return 0; 4896a9ceb31STejun Heo } 4906a9ceb31STejun Heo 491581adcbeSTejun Heo static int __init_memblock __memblock_remove(struct memblock_type *type, 4928f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 49395f72d1eSYinghai Lu { 49471936180STejun Heo int start_rgn, end_rgn; 49571936180STejun Heo int i, ret; 49695f72d1eSYinghai Lu 49771936180STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 49871936180STejun Heo if (ret) 49971936180STejun Heo return ret; 50095f72d1eSYinghai Lu 50171936180STejun Heo for (i = end_rgn - 1; i >= start_rgn; i--) 50271936180STejun Heo memblock_remove_region(type, i); 50395f72d1eSYinghai Lu return 0; 50495f72d1eSYinghai Lu } 50595f72d1eSYinghai Lu 506581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 50795f72d1eSYinghai Lu { 50895f72d1eSYinghai Lu return __memblock_remove(&memblock.memory, base, size); 50995f72d1eSYinghai Lu } 51095f72d1eSYinghai Lu 511581adcbeSTejun Heo int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) 51295f72d1eSYinghai Lu { 51324aa0788STejun Heo memblock_dbg(" memblock_free: [%#016llx-%#016llx] %pF\n", 514a150439cSH. Peter Anvin (unsigned long long)base, 515a150439cSH. Peter Anvin (unsigned long long)base + size, 516a150439cSH. Peter Anvin (void *)_RET_IP_); 51724aa0788STejun Heo 51895f72d1eSYinghai Lu return __memblock_remove(&memblock.reserved, base, size); 51995f72d1eSYinghai Lu } 52095f72d1eSYinghai Lu 521581adcbeSTejun Heo int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 52295f72d1eSYinghai Lu { 523e3239ff9SBenjamin Herrenschmidt struct memblock_type *_rgn = &memblock.reserved; 52495f72d1eSYinghai Lu 52524aa0788STejun Heo memblock_dbg("memblock_reserve: [%#016llx-%#016llx] %pF\n", 526a150439cSH. Peter Anvin (unsigned long long)base, 527a150439cSH. Peter Anvin (unsigned long long)base + size, 528a150439cSH. Peter Anvin (void *)_RET_IP_); 52995f72d1eSYinghai Lu BUG_ON(0 == size); 53095f72d1eSYinghai Lu 531*7fb0bc3fSTejun Heo return memblock_add_region(_rgn, base, size, MAX_NUMNODES); 53295f72d1eSYinghai Lu } 53395f72d1eSYinghai Lu 53435fd0808STejun Heo /** 53535fd0808STejun Heo * __next_free_mem_range - next function for for_each_free_mem_range() 53635fd0808STejun Heo * @idx: pointer to u64 loop variable 53735fd0808STejun Heo * @nid: nid: node selector, %MAX_NUMNODES for all nodes 53835fd0808STejun Heo * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 53935fd0808STejun Heo * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 54035fd0808STejun Heo * @p_nid: ptr to int for nid of the range, can be %NULL 54135fd0808STejun Heo * 54235fd0808STejun Heo * Find the first free area from *@idx which matches @nid, fill the out 54335fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 54435fd0808STejun Heo * *@idx contains index into memory region and the upper 32bit indexes the 54535fd0808STejun Heo * areas before each reserved region. For example, if reserved regions 54635fd0808STejun Heo * look like the following, 54735fd0808STejun Heo * 54835fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 54935fd0808STejun Heo * 55035fd0808STejun Heo * The upper 32bit indexes the following regions. 55135fd0808STejun Heo * 55235fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 55335fd0808STejun Heo * 55435fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 55535fd0808STejun Heo * in lockstep and returns each intersection. 55635fd0808STejun Heo */ 55735fd0808STejun Heo void __init_memblock __next_free_mem_range(u64 *idx, int nid, 55835fd0808STejun Heo phys_addr_t *out_start, 55935fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 56035fd0808STejun Heo { 56135fd0808STejun Heo struct memblock_type *mem = &memblock.memory; 56235fd0808STejun Heo struct memblock_type *rsv = &memblock.reserved; 56335fd0808STejun Heo int mi = *idx & 0xffffffff; 56435fd0808STejun Heo int ri = *idx >> 32; 56535fd0808STejun Heo 56635fd0808STejun Heo for ( ; mi < mem->cnt; mi++) { 56735fd0808STejun Heo struct memblock_region *m = &mem->regions[mi]; 56835fd0808STejun Heo phys_addr_t m_start = m->base; 56935fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 57035fd0808STejun Heo 57135fd0808STejun Heo /* only memory regions are associated with nodes, check it */ 57235fd0808STejun Heo if (nid != MAX_NUMNODES && nid != memblock_get_region_node(m)) 57335fd0808STejun Heo continue; 57435fd0808STejun Heo 57535fd0808STejun Heo /* scan areas before each reservation for intersection */ 57635fd0808STejun Heo for ( ; ri < rsv->cnt + 1; ri++) { 57735fd0808STejun Heo struct memblock_region *r = &rsv->regions[ri]; 57835fd0808STejun Heo phys_addr_t r_start = ri ? r[-1].base + r[-1].size : 0; 57935fd0808STejun Heo phys_addr_t r_end = ri < rsv->cnt ? r->base : ULLONG_MAX; 58035fd0808STejun Heo 58135fd0808STejun Heo /* if ri advanced past mi, break out to advance mi */ 58235fd0808STejun Heo if (r_start >= m_end) 58335fd0808STejun Heo break; 58435fd0808STejun Heo /* if the two regions intersect, we're done */ 58535fd0808STejun Heo if (m_start < r_end) { 58635fd0808STejun Heo if (out_start) 58735fd0808STejun Heo *out_start = max(m_start, r_start); 58835fd0808STejun Heo if (out_end) 58935fd0808STejun Heo *out_end = min(m_end, r_end); 59035fd0808STejun Heo if (out_nid) 59135fd0808STejun Heo *out_nid = memblock_get_region_node(m); 59235fd0808STejun Heo /* 59335fd0808STejun Heo * The region which ends first is advanced 59435fd0808STejun Heo * for the next iteration. 59535fd0808STejun Heo */ 59635fd0808STejun Heo if (m_end <= r_end) 59735fd0808STejun Heo mi++; 59835fd0808STejun Heo else 59935fd0808STejun Heo ri++; 60035fd0808STejun Heo *idx = (u32)mi | (u64)ri << 32; 60135fd0808STejun Heo return; 60235fd0808STejun Heo } 60335fd0808STejun Heo } 60435fd0808STejun Heo } 60535fd0808STejun Heo 60635fd0808STejun Heo /* signal end of iteration */ 60735fd0808STejun Heo *idx = ULLONG_MAX; 60835fd0808STejun Heo } 60935fd0808STejun Heo 6107c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 6117c0caeb8STejun Heo /* 6127c0caeb8STejun Heo * Common iterator interface used to define for_each_mem_range(). 6137c0caeb8STejun Heo */ 6147c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 6157c0caeb8STejun Heo unsigned long *out_start_pfn, 6167c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 6177c0caeb8STejun Heo { 6187c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 6197c0caeb8STejun Heo struct memblock_region *r; 6207c0caeb8STejun Heo 6217c0caeb8STejun Heo while (++*idx < type->cnt) { 6227c0caeb8STejun Heo r = &type->regions[*idx]; 6237c0caeb8STejun Heo 6247c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 6257c0caeb8STejun Heo continue; 6267c0caeb8STejun Heo if (nid == MAX_NUMNODES || nid == r->nid) 6277c0caeb8STejun Heo break; 6287c0caeb8STejun Heo } 6297c0caeb8STejun Heo if (*idx >= type->cnt) { 6307c0caeb8STejun Heo *idx = -1; 6317c0caeb8STejun Heo return; 6327c0caeb8STejun Heo } 6337c0caeb8STejun Heo 6347c0caeb8STejun Heo if (out_start_pfn) 6357c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 6367c0caeb8STejun Heo if (out_end_pfn) 6377c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 6387c0caeb8STejun Heo if (out_nid) 6397c0caeb8STejun Heo *out_nid = r->nid; 6407c0caeb8STejun Heo } 6417c0caeb8STejun Heo 6427c0caeb8STejun Heo /** 6437c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 6447c0caeb8STejun Heo * @base: base of area to set node ID for 6457c0caeb8STejun Heo * @size: size of area to set node ID for 6467c0caeb8STejun Heo * @nid: node ID to set 6477c0caeb8STejun Heo * 6487c0caeb8STejun Heo * Set the nid of memblock memory regions in [@base,@base+@size) to @nid. 6497c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 6507c0caeb8STejun Heo * 6517c0caeb8STejun Heo * RETURNS: 6527c0caeb8STejun Heo * 0 on success, -errno on failure. 6537c0caeb8STejun Heo */ 6547c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 6557c0caeb8STejun Heo int nid) 6567c0caeb8STejun Heo { 6577c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 6586a9ceb31STejun Heo int start_rgn, end_rgn; 6596a9ceb31STejun Heo int i, ret; 6607c0caeb8STejun Heo 6616a9ceb31STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 6626a9ceb31STejun Heo if (ret) 6636a9ceb31STejun Heo return ret; 6647c0caeb8STejun Heo 6656a9ceb31STejun Heo for (i = start_rgn; i < end_rgn; i++) 6666a9ceb31STejun Heo type->regions[i].nid = nid; 6677c0caeb8STejun Heo 6687c0caeb8STejun Heo memblock_merge_regions(type); 6697c0caeb8STejun Heo return 0; 6707c0caeb8STejun Heo } 6717c0caeb8STejun Heo #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ 6727c0caeb8STejun Heo 6736ed311b2SBenjamin Herrenschmidt phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 67495f72d1eSYinghai Lu { 6756ed311b2SBenjamin Herrenschmidt phys_addr_t found; 67695f72d1eSYinghai Lu 6776ed311b2SBenjamin Herrenschmidt /* We align the size to limit fragmentation. Without this, a lot of 6786ed311b2SBenjamin Herrenschmidt * small allocs quickly eat up the whole reserve array on sparc 6796ed311b2SBenjamin Herrenschmidt */ 680348968ebSTejun Heo size = round_up(size, align); 6816ed311b2SBenjamin Herrenschmidt 682fc769a8eSTejun Heo found = memblock_find_in_range(0, max_addr, size, align); 6839c8c27e2STejun Heo if (found && !memblock_reserve(found, size)) 6846ed311b2SBenjamin Herrenschmidt return found; 6856ed311b2SBenjamin Herrenschmidt 6866ed311b2SBenjamin Herrenschmidt return 0; 68795f72d1eSYinghai Lu } 68895f72d1eSYinghai Lu 6896ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 69095f72d1eSYinghai Lu { 6916ed311b2SBenjamin Herrenschmidt phys_addr_t alloc; 6926ed311b2SBenjamin Herrenschmidt 6936ed311b2SBenjamin Herrenschmidt alloc = __memblock_alloc_base(size, align, max_addr); 6946ed311b2SBenjamin Herrenschmidt 6956ed311b2SBenjamin Herrenschmidt if (alloc == 0) 6966ed311b2SBenjamin Herrenschmidt panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n", 6976ed311b2SBenjamin Herrenschmidt (unsigned long long) size, (unsigned long long) max_addr); 6986ed311b2SBenjamin Herrenschmidt 6996ed311b2SBenjamin Herrenschmidt return alloc; 70095f72d1eSYinghai Lu } 70195f72d1eSYinghai Lu 7026ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) 70395f72d1eSYinghai Lu { 7046ed311b2SBenjamin Herrenschmidt return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 70595f72d1eSYinghai Lu } 70695f72d1eSYinghai Lu 70795f72d1eSYinghai Lu 7086ed311b2SBenjamin Herrenschmidt /* 70934e18455STejun Heo * Additional node-local top-down allocators. 710c196f76fSBenjamin Herrenschmidt * 711c196f76fSBenjamin Herrenschmidt * WARNING: Only available after early_node_map[] has been populated, 712c196f76fSBenjamin Herrenschmidt * on some architectures, that is after all the calls to add_active_range() 713c196f76fSBenjamin Herrenschmidt * have been done to populate it. 7146ed311b2SBenjamin Herrenschmidt */ 71595f72d1eSYinghai Lu 71634e18455STejun Heo static phys_addr_t __init memblock_nid_range_rev(phys_addr_t start, 71734e18455STejun Heo phys_addr_t end, int *nid) 718c3f72b57SBenjamin Herrenschmidt { 719c196f76fSBenjamin Herrenschmidt #ifdef CONFIG_ARCH_POPULATES_NODE_MAP 720c196f76fSBenjamin Herrenschmidt unsigned long start_pfn, end_pfn; 721c196f76fSBenjamin Herrenschmidt int i; 722c196f76fSBenjamin Herrenschmidt 723b2fea988STejun Heo for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, nid) 72434e18455STejun Heo if (end > PFN_PHYS(start_pfn) && end <= PFN_PHYS(end_pfn)) 72534e18455STejun Heo return max(start, PFN_PHYS(start_pfn)); 726c196f76fSBenjamin Herrenschmidt #endif 727c3f72b57SBenjamin Herrenschmidt *nid = 0; 72834e18455STejun Heo return start; 729c3f72b57SBenjamin Herrenschmidt } 730c3f72b57SBenjamin Herrenschmidt 731e6498040STejun Heo phys_addr_t __init memblock_find_in_range_node(phys_addr_t start, 732e6498040STejun Heo phys_addr_t end, 7332898cc4cSBenjamin Herrenschmidt phys_addr_t size, 7342898cc4cSBenjamin Herrenschmidt phys_addr_t align, int nid) 73595f72d1eSYinghai Lu { 736e3239ff9SBenjamin Herrenschmidt struct memblock_type *mem = &memblock.memory; 73795f72d1eSYinghai Lu int i; 73895f72d1eSYinghai Lu 73995f72d1eSYinghai Lu BUG_ON(0 == size); 74095f72d1eSYinghai Lu 741e6498040STejun Heo /* Pump up max_addr */ 742e6498040STejun Heo if (end == MEMBLOCK_ALLOC_ACCESSIBLE) 743e6498040STejun Heo end = memblock.current_limit; 744e6498040STejun Heo 745e6498040STejun Heo for (i = mem->cnt - 1; i >= 0; i--) { 746e6498040STejun Heo struct memblock_region *r = &mem->regions[i]; 747e6498040STejun Heo phys_addr_t base = max(start, r->base); 748e6498040STejun Heo phys_addr_t top = min(end, r->base + r->size); 749e6498040STejun Heo 750e6498040STejun Heo while (base < top) { 751e6498040STejun Heo phys_addr_t tbase, ret; 752e6498040STejun Heo int tnid; 753e6498040STejun Heo 754e6498040STejun Heo tbase = memblock_nid_range_rev(base, top, &tnid); 755e6498040STejun Heo if (nid == MAX_NUMNODES || tnid == nid) { 756e6498040STejun Heo ret = memblock_find_region(tbase, top, size, align); 757e6498040STejun Heo if (ret) 758e6498040STejun Heo return ret; 759e6498040STejun Heo } 760e6498040STejun Heo top = tbase; 761e6498040STejun Heo } 762e6498040STejun Heo } 763e6498040STejun Heo 764e6498040STejun Heo return 0; 765e6498040STejun Heo } 766e6498040STejun Heo 767e6498040STejun Heo phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) 768e6498040STejun Heo { 769e6498040STejun Heo phys_addr_t found; 770e6498040STejun Heo 771e6498040STejun Heo /* 772e6498040STejun Heo * We align the size to limit fragmentation. Without this, a lot of 7737f219c73SBenjamin Herrenschmidt * small allocs quickly eat up the whole reserve array on sparc 7747f219c73SBenjamin Herrenschmidt */ 775348968ebSTejun Heo size = round_up(size, align); 7767f219c73SBenjamin Herrenschmidt 777e6498040STejun Heo found = memblock_find_in_range_node(0, MEMBLOCK_ALLOC_ACCESSIBLE, 77895f72d1eSYinghai Lu size, align, nid); 7799c8c27e2STejun Heo if (found && !memblock_reserve(found, size)) 780e6498040STejun Heo return found; 78195f72d1eSYinghai Lu 7829d1e2492SBenjamin Herrenschmidt return 0; 7839d1e2492SBenjamin Herrenschmidt } 7849d1e2492SBenjamin Herrenschmidt 7859d1e2492SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 7869d1e2492SBenjamin Herrenschmidt { 7879d1e2492SBenjamin Herrenschmidt phys_addr_t res = memblock_alloc_nid(size, align, nid); 7889d1e2492SBenjamin Herrenschmidt 7899d1e2492SBenjamin Herrenschmidt if (res) 7909d1e2492SBenjamin Herrenschmidt return res; 79115fb0972STejun Heo return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 79295f72d1eSYinghai Lu } 79395f72d1eSYinghai Lu 7949d1e2492SBenjamin Herrenschmidt 7959d1e2492SBenjamin Herrenschmidt /* 7969d1e2492SBenjamin Herrenschmidt * Remaining API functions 7979d1e2492SBenjamin Herrenschmidt */ 7989d1e2492SBenjamin Herrenschmidt 7992898cc4cSBenjamin Herrenschmidt phys_addr_t __init memblock_phys_mem_size(void) 80095f72d1eSYinghai Lu { 8011440c4e2STejun Heo return memblock.memory.total_size; 80295f72d1eSYinghai Lu } 80395f72d1eSYinghai Lu 8040a93ebefSSam Ravnborg /* lowest address */ 8050a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 8060a93ebefSSam Ravnborg { 8070a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 8080a93ebefSSam Ravnborg } 8090a93ebefSSam Ravnborg 81010d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 81195f72d1eSYinghai Lu { 81295f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 81395f72d1eSYinghai Lu 814e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 81595f72d1eSYinghai Lu } 81695f72d1eSYinghai Lu 817c0ce8fefSTejun Heo void __init memblock_enforce_memory_limit(phys_addr_t limit) 81895f72d1eSYinghai Lu { 81995f72d1eSYinghai Lu unsigned long i; 820c0ce8fefSTejun Heo phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; 82195f72d1eSYinghai Lu 822c0ce8fefSTejun Heo if (!limit) 82395f72d1eSYinghai Lu return; 82495f72d1eSYinghai Lu 825c0ce8fefSTejun Heo /* find out max address */ 82695f72d1eSYinghai Lu for (i = 0; i < memblock.memory.cnt; i++) { 827c0ce8fefSTejun Heo struct memblock_region *r = &memblock.memory.regions[i]; 82895f72d1eSYinghai Lu 829c0ce8fefSTejun Heo if (limit <= r->size) { 830c0ce8fefSTejun Heo max_addr = r->base + limit; 83195f72d1eSYinghai Lu break; 83295f72d1eSYinghai Lu } 833c0ce8fefSTejun Heo limit -= r->size; 83495f72d1eSYinghai Lu } 835c0ce8fefSTejun Heo 836c0ce8fefSTejun Heo /* truncate both memory and reserved regions */ 837c0ce8fefSTejun Heo __memblock_remove(&memblock.memory, max_addr, (phys_addr_t)ULLONG_MAX); 838c0ce8fefSTejun Heo __memblock_remove(&memblock.reserved, max_addr, (phys_addr_t)ULLONG_MAX); 83995f72d1eSYinghai Lu } 84095f72d1eSYinghai Lu 841cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 84272d4b0b4SBenjamin Herrenschmidt { 84372d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 84472d4b0b4SBenjamin Herrenschmidt 84572d4b0b4SBenjamin Herrenschmidt do { 84672d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 84772d4b0b4SBenjamin Herrenschmidt 84872d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 84972d4b0b4SBenjamin Herrenschmidt right = mid; 85072d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 85172d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 85272d4b0b4SBenjamin Herrenschmidt left = mid + 1; 85372d4b0b4SBenjamin Herrenschmidt else 85472d4b0b4SBenjamin Herrenschmidt return mid; 85572d4b0b4SBenjamin Herrenschmidt } while (left < right); 85672d4b0b4SBenjamin Herrenschmidt return -1; 85772d4b0b4SBenjamin Herrenschmidt } 85872d4b0b4SBenjamin Herrenschmidt 8592898cc4cSBenjamin Herrenschmidt int __init memblock_is_reserved(phys_addr_t addr) 86095f72d1eSYinghai Lu { 86172d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 86295f72d1eSYinghai Lu } 86372d4b0b4SBenjamin Herrenschmidt 8643661ca66SYinghai Lu int __init_memblock memblock_is_memory(phys_addr_t addr) 86572d4b0b4SBenjamin Herrenschmidt { 86672d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 86772d4b0b4SBenjamin Herrenschmidt } 86872d4b0b4SBenjamin Herrenschmidt 8693661ca66SYinghai Lu int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 87072d4b0b4SBenjamin Herrenschmidt { 871abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 872eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 87372d4b0b4SBenjamin Herrenschmidt 87472d4b0b4SBenjamin Herrenschmidt if (idx == -1) 87595f72d1eSYinghai Lu return 0; 876abb65272STomi Valkeinen return memblock.memory.regions[idx].base <= base && 877abb65272STomi Valkeinen (memblock.memory.regions[idx].base + 878eb18f1b5STejun Heo memblock.memory.regions[idx].size) >= end; 87995f72d1eSYinghai Lu } 88095f72d1eSYinghai Lu 88110d06439SYinghai Lu int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 88295f72d1eSYinghai Lu { 883eb18f1b5STejun Heo memblock_cap_size(base, &size); 884f1c2c19cSBenjamin Herrenschmidt return memblock_overlaps_region(&memblock.reserved, base, size) >= 0; 88595f72d1eSYinghai Lu } 88695f72d1eSYinghai Lu 887e63075a3SBenjamin Herrenschmidt 8883661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 889e63075a3SBenjamin Herrenschmidt { 890e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 891e63075a3SBenjamin Herrenschmidt } 892e63075a3SBenjamin Herrenschmidt 8937c0caeb8STejun Heo static void __init_memblock memblock_dump(struct memblock_type *type, char *name) 8946ed311b2SBenjamin Herrenschmidt { 8956ed311b2SBenjamin Herrenschmidt unsigned long long base, size; 8966ed311b2SBenjamin Herrenschmidt int i; 8976ed311b2SBenjamin Herrenschmidt 8987c0caeb8STejun Heo pr_info(" %s.cnt = 0x%lx\n", name, type->cnt); 8996ed311b2SBenjamin Herrenschmidt 9007c0caeb8STejun Heo for (i = 0; i < type->cnt; i++) { 9017c0caeb8STejun Heo struct memblock_region *rgn = &type->regions[i]; 9027c0caeb8STejun Heo char nid_buf[32] = ""; 9036ed311b2SBenjamin Herrenschmidt 9047c0caeb8STejun Heo base = rgn->base; 9057c0caeb8STejun Heo size = rgn->size; 9067c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 9077c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 9087c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 9097c0caeb8STejun Heo memblock_get_region_node(rgn)); 9107c0caeb8STejun Heo #endif 9117c0caeb8STejun Heo pr_info(" %s[%#x]\t[%#016llx-%#016llx], %#llx bytes%s\n", 9127c0caeb8STejun Heo name, i, base, base + size - 1, size, nid_buf); 9136ed311b2SBenjamin Herrenschmidt } 9146ed311b2SBenjamin Herrenschmidt } 9156ed311b2SBenjamin Herrenschmidt 9164ff7b82fSTejun Heo void __init_memblock __memblock_dump_all(void) 9176ed311b2SBenjamin Herrenschmidt { 9186ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 9191440c4e2STejun Heo pr_info(" memory size = %#llx reserved size = %#llx\n", 9201440c4e2STejun Heo (unsigned long long)memblock.memory.total_size, 9211440c4e2STejun Heo (unsigned long long)memblock.reserved.total_size); 9226ed311b2SBenjamin Herrenschmidt 9236ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.memory, "memory"); 9246ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.reserved, "reserved"); 9256ed311b2SBenjamin Herrenschmidt } 9266ed311b2SBenjamin Herrenschmidt 9271aadc056STejun Heo void __init memblock_allow_resize(void) 9286ed311b2SBenjamin Herrenschmidt { 929142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 9306ed311b2SBenjamin Herrenschmidt } 9316ed311b2SBenjamin Herrenschmidt 9326ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 9336ed311b2SBenjamin Herrenschmidt { 9346ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 9356ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 9366ed311b2SBenjamin Herrenschmidt return 0; 9376ed311b2SBenjamin Herrenschmidt } 9386ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 9396ed311b2SBenjamin Herrenschmidt 940c378ddd5STejun Heo #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) 9416d03b885SBenjamin Herrenschmidt 9426d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 9436d03b885SBenjamin Herrenschmidt { 9446d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 9456d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 9466d03b885SBenjamin Herrenschmidt int i; 9476d03b885SBenjamin Herrenschmidt 9486d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 9496d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 9506d03b885SBenjamin Herrenschmidt seq_printf(m, "%4d: ", i); 9516d03b885SBenjamin Herrenschmidt if (sizeof(phys_addr_t) == 4) 9526d03b885SBenjamin Herrenschmidt seq_printf(m, "0x%08lx..0x%08lx\n", 9536d03b885SBenjamin Herrenschmidt (unsigned long)reg->base, 9546d03b885SBenjamin Herrenschmidt (unsigned long)(reg->base + reg->size - 1)); 9556d03b885SBenjamin Herrenschmidt else 9566d03b885SBenjamin Herrenschmidt seq_printf(m, "0x%016llx..0x%016llx\n", 9576d03b885SBenjamin Herrenschmidt (unsigned long long)reg->base, 9586d03b885SBenjamin Herrenschmidt (unsigned long long)(reg->base + reg->size - 1)); 9596d03b885SBenjamin Herrenschmidt 9606d03b885SBenjamin Herrenschmidt } 9616d03b885SBenjamin Herrenschmidt return 0; 9626d03b885SBenjamin Herrenschmidt } 9636d03b885SBenjamin Herrenschmidt 9646d03b885SBenjamin Herrenschmidt static int memblock_debug_open(struct inode *inode, struct file *file) 9656d03b885SBenjamin Herrenschmidt { 9666d03b885SBenjamin Herrenschmidt return single_open(file, memblock_debug_show, inode->i_private); 9676d03b885SBenjamin Herrenschmidt } 9686d03b885SBenjamin Herrenschmidt 9696d03b885SBenjamin Herrenschmidt static const struct file_operations memblock_debug_fops = { 9706d03b885SBenjamin Herrenschmidt .open = memblock_debug_open, 9716d03b885SBenjamin Herrenschmidt .read = seq_read, 9726d03b885SBenjamin Herrenschmidt .llseek = seq_lseek, 9736d03b885SBenjamin Herrenschmidt .release = single_release, 9746d03b885SBenjamin Herrenschmidt }; 9756d03b885SBenjamin Herrenschmidt 9766d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 9776d03b885SBenjamin Herrenschmidt { 9786d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 9796d03b885SBenjamin Herrenschmidt if (!root) 9806d03b885SBenjamin Herrenschmidt return -ENXIO; 9816d03b885SBenjamin Herrenschmidt debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); 9826d03b885SBenjamin Herrenschmidt debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); 9836d03b885SBenjamin Herrenschmidt 9846d03b885SBenjamin Herrenschmidt return 0; 9856d03b885SBenjamin Herrenschmidt } 9866d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 9876d03b885SBenjamin Herrenschmidt 9886d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 989