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; 3910d06439SYinghai Lu 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 52*eb18f1b5STejun Heo /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ 53*eb18f1b5STejun Heo static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) 54*eb18f1b5STejun Heo { 55*eb18f1b5STejun Heo return *size = min(*size, (phys_addr_t)ULLONG_MAX - base); 56*eb18f1b5STejun Heo } 57*eb18f1b5STejun 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 { 1827c0caeb8STejun Heo memmove(&type->regions[r], &type->regions[r + 1], 1837c0caeb8STejun Heo (type->cnt - (r + 1)) * sizeof(type->regions[r])); 184e3239ff9SBenjamin Herrenschmidt type->cnt--; 18595f72d1eSYinghai Lu 1868f7a6605SBenjamin Herrenschmidt /* Special case for empty arrays */ 1878f7a6605SBenjamin Herrenschmidt if (type->cnt == 0) { 1888f7a6605SBenjamin Herrenschmidt type->cnt = 1; 1898f7a6605SBenjamin Herrenschmidt type->regions[0].base = 0; 1908f7a6605SBenjamin Herrenschmidt type->regions[0].size = 0; 1917c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 1928f7a6605SBenjamin Herrenschmidt } 19395f72d1eSYinghai Lu } 19495f72d1eSYinghai Lu 19510d06439SYinghai Lu static int __init_memblock memblock_double_array(struct memblock_type *type) 196142b45a7SBenjamin Herrenschmidt { 197142b45a7SBenjamin Herrenschmidt struct memblock_region *new_array, *old_array; 198142b45a7SBenjamin Herrenschmidt phys_addr_t old_size, new_size, addr; 199142b45a7SBenjamin Herrenschmidt int use_slab = slab_is_available(); 200142b45a7SBenjamin Herrenschmidt 201142b45a7SBenjamin Herrenschmidt /* We don't allow resizing until we know about the reserved regions 202142b45a7SBenjamin Herrenschmidt * of memory that aren't suitable for allocation 203142b45a7SBenjamin Herrenschmidt */ 204142b45a7SBenjamin Herrenschmidt if (!memblock_can_resize) 205142b45a7SBenjamin Herrenschmidt return -1; 206142b45a7SBenjamin Herrenschmidt 207142b45a7SBenjamin Herrenschmidt /* Calculate new doubled size */ 208142b45a7SBenjamin Herrenschmidt old_size = type->max * sizeof(struct memblock_region); 209142b45a7SBenjamin Herrenschmidt new_size = old_size << 1; 210142b45a7SBenjamin Herrenschmidt 211142b45a7SBenjamin Herrenschmidt /* Try to find some space for it. 212142b45a7SBenjamin Herrenschmidt * 213142b45a7SBenjamin Herrenschmidt * WARNING: We assume that either slab_is_available() and we use it or 214142b45a7SBenjamin Herrenschmidt * we use MEMBLOCK for allocations. That means that this is unsafe to use 215142b45a7SBenjamin Herrenschmidt * when bootmem is currently active (unless bootmem itself is implemented 216142b45a7SBenjamin Herrenschmidt * on top of MEMBLOCK which isn't the case yet) 217142b45a7SBenjamin Herrenschmidt * 218142b45a7SBenjamin Herrenschmidt * This should however not be an issue for now, as we currently only 219142b45a7SBenjamin Herrenschmidt * call into MEMBLOCK while it's still active, or much later when slab is 220142b45a7SBenjamin Herrenschmidt * active for memory hotplug operations 221142b45a7SBenjamin Herrenschmidt */ 222142b45a7SBenjamin Herrenschmidt if (use_slab) { 223142b45a7SBenjamin Herrenschmidt new_array = kmalloc(new_size, GFP_KERNEL); 2241f5026a7STejun Heo addr = new_array ? __pa(new_array) : 0; 225142b45a7SBenjamin Herrenschmidt } else 226fc769a8eSTejun Heo addr = memblock_find_in_range(0, MEMBLOCK_ALLOC_ACCESSIBLE, new_size, sizeof(phys_addr_t)); 2271f5026a7STejun Heo if (!addr) { 228142b45a7SBenjamin Herrenschmidt pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", 229142b45a7SBenjamin Herrenschmidt memblock_type_name(type), type->max, type->max * 2); 230142b45a7SBenjamin Herrenschmidt return -1; 231142b45a7SBenjamin Herrenschmidt } 232142b45a7SBenjamin Herrenschmidt new_array = __va(addr); 233142b45a7SBenjamin Herrenschmidt 234ea9e4376SYinghai Lu memblock_dbg("memblock: %s array is doubled to %ld at [%#010llx-%#010llx]", 235ea9e4376SYinghai Lu memblock_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size - 1); 236ea9e4376SYinghai Lu 237142b45a7SBenjamin Herrenschmidt /* Found space, we now need to move the array over before 238142b45a7SBenjamin Herrenschmidt * we add the reserved region since it may be our reserved 239142b45a7SBenjamin Herrenschmidt * array itself that is full. 240142b45a7SBenjamin Herrenschmidt */ 241142b45a7SBenjamin Herrenschmidt memcpy(new_array, type->regions, old_size); 242142b45a7SBenjamin Herrenschmidt memset(new_array + type->max, 0, old_size); 243142b45a7SBenjamin Herrenschmidt old_array = type->regions; 244142b45a7SBenjamin Herrenschmidt type->regions = new_array; 245142b45a7SBenjamin Herrenschmidt type->max <<= 1; 246142b45a7SBenjamin Herrenschmidt 247142b45a7SBenjamin Herrenschmidt /* If we use SLAB that's it, we are done */ 248142b45a7SBenjamin Herrenschmidt if (use_slab) 249142b45a7SBenjamin Herrenschmidt return 0; 250142b45a7SBenjamin Herrenschmidt 251142b45a7SBenjamin Herrenschmidt /* Add the new reserved region now. Should not fail ! */ 2529c8c27e2STejun Heo BUG_ON(memblock_reserve(addr, new_size)); 253142b45a7SBenjamin Herrenschmidt 254142b45a7SBenjamin Herrenschmidt /* If the array wasn't our static init one, then free it. We only do 255142b45a7SBenjamin Herrenschmidt * that before SLAB is available as later on, we don't know whether 256142b45a7SBenjamin Herrenschmidt * to use kfree or free_bootmem_pages(). Shouldn't be a big deal 257142b45a7SBenjamin Herrenschmidt * anyways 258142b45a7SBenjamin Herrenschmidt */ 259142b45a7SBenjamin Herrenschmidt if (old_array != memblock_memory_init_regions && 260142b45a7SBenjamin Herrenschmidt old_array != memblock_reserved_init_regions) 261142b45a7SBenjamin Herrenschmidt memblock_free(__pa(old_array), old_size); 262142b45a7SBenjamin Herrenschmidt 263142b45a7SBenjamin Herrenschmidt return 0; 264142b45a7SBenjamin Herrenschmidt } 265142b45a7SBenjamin Herrenschmidt 266784656f9STejun Heo /** 267784656f9STejun Heo * memblock_merge_regions - merge neighboring compatible regions 268784656f9STejun Heo * @type: memblock type to scan 269784656f9STejun Heo * 270784656f9STejun Heo * Scan @type and merge neighboring compatible regions. 271784656f9STejun Heo */ 272784656f9STejun Heo static void __init_memblock memblock_merge_regions(struct memblock_type *type) 273784656f9STejun Heo { 274784656f9STejun Heo int i = 0; 275784656f9STejun Heo 276784656f9STejun Heo /* cnt never goes below 1 */ 277784656f9STejun Heo while (i < type->cnt - 1) { 278784656f9STejun Heo struct memblock_region *this = &type->regions[i]; 279784656f9STejun Heo struct memblock_region *next = &type->regions[i + 1]; 280784656f9STejun Heo 2817c0caeb8STejun Heo if (this->base + this->size != next->base || 2827c0caeb8STejun Heo memblock_get_region_node(this) != 2837c0caeb8STejun Heo memblock_get_region_node(next)) { 284784656f9STejun Heo BUG_ON(this->base + this->size > next->base); 285784656f9STejun Heo i++; 286784656f9STejun Heo continue; 287784656f9STejun Heo } 288784656f9STejun Heo 289784656f9STejun Heo this->size += next->size; 290784656f9STejun Heo memmove(next, next + 1, (type->cnt - (i + 1)) * sizeof(*next)); 291784656f9STejun Heo type->cnt--; 292784656f9STejun Heo } 293784656f9STejun Heo } 294784656f9STejun Heo 295784656f9STejun Heo /** 296784656f9STejun Heo * memblock_insert_region - insert new memblock region 297784656f9STejun Heo * @type: memblock type to insert into 298784656f9STejun Heo * @idx: index for the insertion point 299784656f9STejun Heo * @base: base address of the new region 300784656f9STejun Heo * @size: size of the new region 301784656f9STejun Heo * 302784656f9STejun Heo * Insert new memblock region [@base,@base+@size) into @type at @idx. 303784656f9STejun Heo * @type must already have extra room to accomodate the new region. 304784656f9STejun Heo */ 305784656f9STejun Heo static void __init_memblock memblock_insert_region(struct memblock_type *type, 306784656f9STejun Heo int idx, phys_addr_t base, 3077c0caeb8STejun Heo phys_addr_t size, int nid) 308784656f9STejun Heo { 309784656f9STejun Heo struct memblock_region *rgn = &type->regions[idx]; 310784656f9STejun Heo 311784656f9STejun Heo BUG_ON(type->cnt >= type->max); 312784656f9STejun Heo memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); 313784656f9STejun Heo rgn->base = base; 314784656f9STejun Heo rgn->size = size; 3157c0caeb8STejun Heo memblock_set_region_node(rgn, nid); 316784656f9STejun Heo type->cnt++; 317784656f9STejun Heo } 318784656f9STejun Heo 319784656f9STejun Heo /** 320784656f9STejun Heo * memblock_add_region - add new memblock region 321784656f9STejun Heo * @type: memblock type to add new region into 322784656f9STejun Heo * @base: base address of the new region 323784656f9STejun Heo * @size: size of the new region 324784656f9STejun Heo * 325784656f9STejun Heo * Add new memblock region [@base,@base+@size) into @type. The new region 326784656f9STejun Heo * is allowed to overlap with existing ones - overlaps don't affect already 327784656f9STejun Heo * existing regions. @type is guaranteed to be minimal (all neighbouring 328784656f9STejun Heo * compatible regions are merged) after the addition. 329784656f9STejun Heo * 330784656f9STejun Heo * RETURNS: 331784656f9STejun Heo * 0 on success, -errno on failure. 332784656f9STejun Heo */ 333581adcbeSTejun Heo static int __init_memblock memblock_add_region(struct memblock_type *type, 3348f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 33595f72d1eSYinghai Lu { 336784656f9STejun Heo bool insert = false; 337*eb18f1b5STejun Heo phys_addr_t obase = base; 338*eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 339784656f9STejun Heo int i, nr_new; 34095f72d1eSYinghai Lu 341784656f9STejun Heo /* special case for empty array */ 342784656f9STejun Heo if (type->regions[0].size == 0) { 343784656f9STejun Heo WARN_ON(type->cnt != 1); 344784656f9STejun Heo type->regions[0].base = base; 345784656f9STejun Heo type->regions[0].size = size; 3467c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 347784656f9STejun Heo return 0; 348784656f9STejun Heo } 349784656f9STejun Heo repeat: 350784656f9STejun Heo /* 351784656f9STejun Heo * The following is executed twice. Once with %false @insert and 352784656f9STejun Heo * then with %true. The first counts the number of regions needed 353784656f9STejun Heo * to accomodate the new area. The second actually inserts them. 354784656f9STejun Heo */ 355784656f9STejun Heo base = obase; 356784656f9STejun Heo nr_new = 0; 357784656f9STejun Heo 3588f7a6605SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 3598f7a6605SBenjamin Herrenschmidt struct memblock_region *rgn = &type->regions[i]; 360784656f9STejun Heo phys_addr_t rbase = rgn->base; 361784656f9STejun Heo phys_addr_t rend = rbase + rgn->size; 3628f7a6605SBenjamin Herrenschmidt 363784656f9STejun Heo if (rbase >= end) 3648f7a6605SBenjamin Herrenschmidt break; 365784656f9STejun Heo if (rend <= base) 366784656f9STejun Heo continue; 367784656f9STejun Heo /* 368784656f9STejun Heo * @rgn overlaps. If it separates the lower part of new 369784656f9STejun Heo * area, insert that portion. 3708f7a6605SBenjamin Herrenschmidt */ 371784656f9STejun Heo if (rbase > base) { 372784656f9STejun Heo nr_new++; 373784656f9STejun Heo if (insert) 374784656f9STejun Heo memblock_insert_region(type, i++, base, 3757c0caeb8STejun Heo rbase - base, MAX_NUMNODES); 376784656f9STejun Heo } 377784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 378784656f9STejun Heo base = min(rend, end); 3798f7a6605SBenjamin Herrenschmidt } 3808f7a6605SBenjamin Herrenschmidt 381784656f9STejun Heo /* insert the remaining portion */ 382784656f9STejun Heo if (base < end) { 383784656f9STejun Heo nr_new++; 384784656f9STejun Heo if (insert) 3857c0caeb8STejun Heo memblock_insert_region(type, i, base, end - base, 3867c0caeb8STejun Heo MAX_NUMNODES); 3878f7a6605SBenjamin Herrenschmidt } 3888f7a6605SBenjamin Herrenschmidt 389784656f9STejun Heo /* 390784656f9STejun Heo * If this was the first round, resize array and repeat for actual 391784656f9STejun Heo * insertions; otherwise, merge and return. 3928f7a6605SBenjamin Herrenschmidt */ 393784656f9STejun Heo if (!insert) { 394784656f9STejun Heo while (type->cnt + nr_new > type->max) 395784656f9STejun Heo if (memblock_double_array(type) < 0) 396784656f9STejun Heo return -ENOMEM; 397784656f9STejun Heo insert = true; 398784656f9STejun Heo goto repeat; 39995f72d1eSYinghai Lu } else { 400784656f9STejun Heo memblock_merge_regions(type); 40195f72d1eSYinghai Lu return 0; 40295f72d1eSYinghai Lu } 403784656f9STejun Heo } 40495f72d1eSYinghai Lu 405581adcbeSTejun Heo int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 40695f72d1eSYinghai Lu { 407e3239ff9SBenjamin Herrenschmidt return memblock_add_region(&memblock.memory, base, size); 40895f72d1eSYinghai Lu } 40995f72d1eSYinghai Lu 4106a9ceb31STejun Heo /** 4116a9ceb31STejun Heo * memblock_isolate_range - isolate given range into disjoint memblocks 4126a9ceb31STejun Heo * @type: memblock type to isolate range for 4136a9ceb31STejun Heo * @base: base of range to isolate 4146a9ceb31STejun Heo * @size: size of range to isolate 4156a9ceb31STejun Heo * @start_rgn: out parameter for the start of isolated region 4166a9ceb31STejun Heo * @end_rgn: out parameter for the end of isolated region 4176a9ceb31STejun Heo * 4186a9ceb31STejun Heo * Walk @type and ensure that regions don't cross the boundaries defined by 4196a9ceb31STejun Heo * [@base,@base+@size). Crossing regions are split at the boundaries, 4206a9ceb31STejun Heo * which may create at most two more regions. The index of the first 4216a9ceb31STejun Heo * region inside the range is returned in *@start_rgn and end in *@end_rgn. 4226a9ceb31STejun Heo * 4236a9ceb31STejun Heo * RETURNS: 4246a9ceb31STejun Heo * 0 on success, -errno on failure. 4256a9ceb31STejun Heo */ 4266a9ceb31STejun Heo static int __init_memblock memblock_isolate_range(struct memblock_type *type, 4276a9ceb31STejun Heo phys_addr_t base, phys_addr_t size, 4286a9ceb31STejun Heo int *start_rgn, int *end_rgn) 4296a9ceb31STejun Heo { 430*eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 4316a9ceb31STejun Heo int i; 4326a9ceb31STejun Heo 4336a9ceb31STejun Heo *start_rgn = *end_rgn = 0; 4346a9ceb31STejun Heo 4356a9ceb31STejun Heo /* we'll create at most two more regions */ 4366a9ceb31STejun Heo while (type->cnt + 2 > type->max) 4376a9ceb31STejun Heo if (memblock_double_array(type) < 0) 4386a9ceb31STejun Heo return -ENOMEM; 4396a9ceb31STejun Heo 4406a9ceb31STejun Heo for (i = 0; i < type->cnt; i++) { 4416a9ceb31STejun Heo struct memblock_region *rgn = &type->regions[i]; 4426a9ceb31STejun Heo phys_addr_t rbase = rgn->base; 4436a9ceb31STejun Heo phys_addr_t rend = rbase + rgn->size; 4446a9ceb31STejun Heo 4456a9ceb31STejun Heo if (rbase >= end) 4466a9ceb31STejun Heo break; 4476a9ceb31STejun Heo if (rend <= base) 4486a9ceb31STejun Heo continue; 4496a9ceb31STejun Heo 4506a9ceb31STejun Heo if (rbase < base) { 4516a9ceb31STejun Heo /* 4526a9ceb31STejun Heo * @rgn intersects from below. Split and continue 4536a9ceb31STejun Heo * to process the next region - the new top half. 4546a9ceb31STejun Heo */ 4556a9ceb31STejun Heo rgn->base = base; 4566a9ceb31STejun Heo rgn->size = rend - rgn->base; 4576a9ceb31STejun Heo memblock_insert_region(type, i, rbase, base - rbase, 45871936180STejun Heo memblock_get_region_node(rgn)); 4596a9ceb31STejun Heo } else if (rend > end) { 4606a9ceb31STejun Heo /* 4616a9ceb31STejun Heo * @rgn intersects from above. Split and redo the 4626a9ceb31STejun Heo * current region - the new bottom half. 4636a9ceb31STejun Heo */ 4646a9ceb31STejun Heo rgn->base = end; 4656a9ceb31STejun Heo rgn->size = rend - rgn->base; 4666a9ceb31STejun Heo memblock_insert_region(type, i--, rbase, end - rbase, 46771936180STejun Heo memblock_get_region_node(rgn)); 4686a9ceb31STejun Heo } else { 4696a9ceb31STejun Heo /* @rgn is fully contained, record it */ 4706a9ceb31STejun Heo if (!*end_rgn) 4716a9ceb31STejun Heo *start_rgn = i; 4726a9ceb31STejun Heo *end_rgn = i + 1; 4736a9ceb31STejun Heo } 4746a9ceb31STejun Heo } 4756a9ceb31STejun Heo 4766a9ceb31STejun Heo return 0; 4776a9ceb31STejun Heo } 4786a9ceb31STejun Heo 479581adcbeSTejun Heo static int __init_memblock __memblock_remove(struct memblock_type *type, 4808f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 48195f72d1eSYinghai Lu { 48271936180STejun Heo int start_rgn, end_rgn; 48371936180STejun Heo int i, ret; 48495f72d1eSYinghai Lu 48571936180STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 48671936180STejun Heo if (ret) 48771936180STejun Heo return ret; 48895f72d1eSYinghai Lu 48971936180STejun Heo for (i = end_rgn - 1; i >= start_rgn; i--) 49071936180STejun Heo memblock_remove_region(type, i); 49195f72d1eSYinghai Lu return 0; 49295f72d1eSYinghai Lu } 49395f72d1eSYinghai Lu 494581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 49595f72d1eSYinghai Lu { 49695f72d1eSYinghai Lu return __memblock_remove(&memblock.memory, base, size); 49795f72d1eSYinghai Lu } 49895f72d1eSYinghai Lu 499581adcbeSTejun Heo int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) 50095f72d1eSYinghai Lu { 50124aa0788STejun Heo memblock_dbg(" memblock_free: [%#016llx-%#016llx] %pF\n", 502a150439cSH. Peter Anvin (unsigned long long)base, 503a150439cSH. Peter Anvin (unsigned long long)base + size, 504a150439cSH. Peter Anvin (void *)_RET_IP_); 50524aa0788STejun Heo 50695f72d1eSYinghai Lu return __memblock_remove(&memblock.reserved, base, size); 50795f72d1eSYinghai Lu } 50895f72d1eSYinghai Lu 509581adcbeSTejun Heo int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 51095f72d1eSYinghai Lu { 511e3239ff9SBenjamin Herrenschmidt struct memblock_type *_rgn = &memblock.reserved; 51295f72d1eSYinghai Lu 51324aa0788STejun Heo memblock_dbg("memblock_reserve: [%#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_); 51795f72d1eSYinghai Lu BUG_ON(0 == size); 51895f72d1eSYinghai Lu 51995f72d1eSYinghai Lu return memblock_add_region(_rgn, base, size); 52095f72d1eSYinghai Lu } 52195f72d1eSYinghai Lu 52235fd0808STejun Heo /** 52335fd0808STejun Heo * __next_free_mem_range - next function for for_each_free_mem_range() 52435fd0808STejun Heo * @idx: pointer to u64 loop variable 52535fd0808STejun Heo * @nid: nid: node selector, %MAX_NUMNODES for all nodes 52635fd0808STejun Heo * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 52735fd0808STejun Heo * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 52835fd0808STejun Heo * @p_nid: ptr to int for nid of the range, can be %NULL 52935fd0808STejun Heo * 53035fd0808STejun Heo * Find the first free area from *@idx which matches @nid, fill the out 53135fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 53235fd0808STejun Heo * *@idx contains index into memory region and the upper 32bit indexes the 53335fd0808STejun Heo * areas before each reserved region. For example, if reserved regions 53435fd0808STejun Heo * look like the following, 53535fd0808STejun Heo * 53635fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 53735fd0808STejun Heo * 53835fd0808STejun Heo * The upper 32bit indexes the following regions. 53935fd0808STejun Heo * 54035fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 54135fd0808STejun Heo * 54235fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 54335fd0808STejun Heo * in lockstep and returns each intersection. 54435fd0808STejun Heo */ 54535fd0808STejun Heo void __init_memblock __next_free_mem_range(u64 *idx, int nid, 54635fd0808STejun Heo phys_addr_t *out_start, 54735fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 54835fd0808STejun Heo { 54935fd0808STejun Heo struct memblock_type *mem = &memblock.memory; 55035fd0808STejun Heo struct memblock_type *rsv = &memblock.reserved; 55135fd0808STejun Heo int mi = *idx & 0xffffffff; 55235fd0808STejun Heo int ri = *idx >> 32; 55335fd0808STejun Heo 55435fd0808STejun Heo for ( ; mi < mem->cnt; mi++) { 55535fd0808STejun Heo struct memblock_region *m = &mem->regions[mi]; 55635fd0808STejun Heo phys_addr_t m_start = m->base; 55735fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 55835fd0808STejun Heo 55935fd0808STejun Heo /* only memory regions are associated with nodes, check it */ 56035fd0808STejun Heo if (nid != MAX_NUMNODES && nid != memblock_get_region_node(m)) 56135fd0808STejun Heo continue; 56235fd0808STejun Heo 56335fd0808STejun Heo /* scan areas before each reservation for intersection */ 56435fd0808STejun Heo for ( ; ri < rsv->cnt + 1; ri++) { 56535fd0808STejun Heo struct memblock_region *r = &rsv->regions[ri]; 56635fd0808STejun Heo phys_addr_t r_start = ri ? r[-1].base + r[-1].size : 0; 56735fd0808STejun Heo phys_addr_t r_end = ri < rsv->cnt ? r->base : ULLONG_MAX; 56835fd0808STejun Heo 56935fd0808STejun Heo /* if ri advanced past mi, break out to advance mi */ 57035fd0808STejun Heo if (r_start >= m_end) 57135fd0808STejun Heo break; 57235fd0808STejun Heo /* if the two regions intersect, we're done */ 57335fd0808STejun Heo if (m_start < r_end) { 57435fd0808STejun Heo if (out_start) 57535fd0808STejun Heo *out_start = max(m_start, r_start); 57635fd0808STejun Heo if (out_end) 57735fd0808STejun Heo *out_end = min(m_end, r_end); 57835fd0808STejun Heo if (out_nid) 57935fd0808STejun Heo *out_nid = memblock_get_region_node(m); 58035fd0808STejun Heo /* 58135fd0808STejun Heo * The region which ends first is advanced 58235fd0808STejun Heo * for the next iteration. 58335fd0808STejun Heo */ 58435fd0808STejun Heo if (m_end <= r_end) 58535fd0808STejun Heo mi++; 58635fd0808STejun Heo else 58735fd0808STejun Heo ri++; 58835fd0808STejun Heo *idx = (u32)mi | (u64)ri << 32; 58935fd0808STejun Heo return; 59035fd0808STejun Heo } 59135fd0808STejun Heo } 59235fd0808STejun Heo } 59335fd0808STejun Heo 59435fd0808STejun Heo /* signal end of iteration */ 59535fd0808STejun Heo *idx = ULLONG_MAX; 59635fd0808STejun Heo } 59735fd0808STejun Heo 5987c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 5997c0caeb8STejun Heo /* 6007c0caeb8STejun Heo * Common iterator interface used to define for_each_mem_range(). 6017c0caeb8STejun Heo */ 6027c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 6037c0caeb8STejun Heo unsigned long *out_start_pfn, 6047c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 6057c0caeb8STejun Heo { 6067c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 6077c0caeb8STejun Heo struct memblock_region *r; 6087c0caeb8STejun Heo 6097c0caeb8STejun Heo while (++*idx < type->cnt) { 6107c0caeb8STejun Heo r = &type->regions[*idx]; 6117c0caeb8STejun Heo 6127c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 6137c0caeb8STejun Heo continue; 6147c0caeb8STejun Heo if (nid == MAX_NUMNODES || nid == r->nid) 6157c0caeb8STejun Heo break; 6167c0caeb8STejun Heo } 6177c0caeb8STejun Heo if (*idx >= type->cnt) { 6187c0caeb8STejun Heo *idx = -1; 6197c0caeb8STejun Heo return; 6207c0caeb8STejun Heo } 6217c0caeb8STejun Heo 6227c0caeb8STejun Heo if (out_start_pfn) 6237c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 6247c0caeb8STejun Heo if (out_end_pfn) 6257c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 6267c0caeb8STejun Heo if (out_nid) 6277c0caeb8STejun Heo *out_nid = r->nid; 6287c0caeb8STejun Heo } 6297c0caeb8STejun Heo 6307c0caeb8STejun Heo /** 6317c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 6327c0caeb8STejun Heo * @base: base of area to set node ID for 6337c0caeb8STejun Heo * @size: size of area to set node ID for 6347c0caeb8STejun Heo * @nid: node ID to set 6357c0caeb8STejun Heo * 6367c0caeb8STejun Heo * Set the nid of memblock memory regions in [@base,@base+@size) to @nid. 6377c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 6387c0caeb8STejun Heo * 6397c0caeb8STejun Heo * RETURNS: 6407c0caeb8STejun Heo * 0 on success, -errno on failure. 6417c0caeb8STejun Heo */ 6427c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 6437c0caeb8STejun Heo int nid) 6447c0caeb8STejun Heo { 6457c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 6466a9ceb31STejun Heo int start_rgn, end_rgn; 6476a9ceb31STejun Heo int i, ret; 6487c0caeb8STejun Heo 6496a9ceb31STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 6506a9ceb31STejun Heo if (ret) 6516a9ceb31STejun Heo return ret; 6527c0caeb8STejun Heo 6536a9ceb31STejun Heo for (i = start_rgn; i < end_rgn; i++) 6546a9ceb31STejun Heo type->regions[i].nid = nid; 6557c0caeb8STejun Heo 6567c0caeb8STejun Heo memblock_merge_regions(type); 6577c0caeb8STejun Heo return 0; 6587c0caeb8STejun Heo } 6597c0caeb8STejun Heo #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ 6607c0caeb8STejun Heo 6616ed311b2SBenjamin Herrenschmidt phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 66295f72d1eSYinghai Lu { 6636ed311b2SBenjamin Herrenschmidt phys_addr_t found; 66495f72d1eSYinghai Lu 6656ed311b2SBenjamin Herrenschmidt /* We align the size to limit fragmentation. Without this, a lot of 6666ed311b2SBenjamin Herrenschmidt * small allocs quickly eat up the whole reserve array on sparc 6676ed311b2SBenjamin Herrenschmidt */ 668348968ebSTejun Heo size = round_up(size, align); 6696ed311b2SBenjamin Herrenschmidt 670fc769a8eSTejun Heo found = memblock_find_in_range(0, max_addr, size, align); 6719c8c27e2STejun Heo if (found && !memblock_reserve(found, size)) 6726ed311b2SBenjamin Herrenschmidt return found; 6736ed311b2SBenjamin Herrenschmidt 6746ed311b2SBenjamin Herrenschmidt return 0; 67595f72d1eSYinghai Lu } 67695f72d1eSYinghai Lu 6776ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 67895f72d1eSYinghai Lu { 6796ed311b2SBenjamin Herrenschmidt phys_addr_t alloc; 6806ed311b2SBenjamin Herrenschmidt 6816ed311b2SBenjamin Herrenschmidt alloc = __memblock_alloc_base(size, align, max_addr); 6826ed311b2SBenjamin Herrenschmidt 6836ed311b2SBenjamin Herrenschmidt if (alloc == 0) 6846ed311b2SBenjamin Herrenschmidt panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n", 6856ed311b2SBenjamin Herrenschmidt (unsigned long long) size, (unsigned long long) max_addr); 6866ed311b2SBenjamin Herrenschmidt 6876ed311b2SBenjamin Herrenschmidt return alloc; 68895f72d1eSYinghai Lu } 68995f72d1eSYinghai Lu 6906ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) 69195f72d1eSYinghai Lu { 6926ed311b2SBenjamin Herrenschmidt return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 69395f72d1eSYinghai Lu } 69495f72d1eSYinghai Lu 69595f72d1eSYinghai Lu 6966ed311b2SBenjamin Herrenschmidt /* 69734e18455STejun Heo * Additional node-local top-down allocators. 698c196f76fSBenjamin Herrenschmidt * 699c196f76fSBenjamin Herrenschmidt * WARNING: Only available after early_node_map[] has been populated, 700c196f76fSBenjamin Herrenschmidt * on some architectures, that is after all the calls to add_active_range() 701c196f76fSBenjamin Herrenschmidt * have been done to populate it. 7026ed311b2SBenjamin Herrenschmidt */ 70395f72d1eSYinghai Lu 70434e18455STejun Heo static phys_addr_t __init memblock_nid_range_rev(phys_addr_t start, 70534e18455STejun Heo phys_addr_t end, int *nid) 706c3f72b57SBenjamin Herrenschmidt { 707c196f76fSBenjamin Herrenschmidt #ifdef CONFIG_ARCH_POPULATES_NODE_MAP 708c196f76fSBenjamin Herrenschmidt unsigned long start_pfn, end_pfn; 709c196f76fSBenjamin Herrenschmidt int i; 710c196f76fSBenjamin Herrenschmidt 711b2fea988STejun Heo for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, nid) 71234e18455STejun Heo if (end > PFN_PHYS(start_pfn) && end <= PFN_PHYS(end_pfn)) 71334e18455STejun Heo return max(start, PFN_PHYS(start_pfn)); 714c196f76fSBenjamin Herrenschmidt #endif 715c3f72b57SBenjamin Herrenschmidt *nid = 0; 71634e18455STejun Heo return start; 717c3f72b57SBenjamin Herrenschmidt } 718c3f72b57SBenjamin Herrenschmidt 719e6498040STejun Heo phys_addr_t __init memblock_find_in_range_node(phys_addr_t start, 720e6498040STejun Heo phys_addr_t end, 7212898cc4cSBenjamin Herrenschmidt phys_addr_t size, 7222898cc4cSBenjamin Herrenschmidt phys_addr_t align, int nid) 72395f72d1eSYinghai Lu { 724e3239ff9SBenjamin Herrenschmidt struct memblock_type *mem = &memblock.memory; 72595f72d1eSYinghai Lu int i; 72695f72d1eSYinghai Lu 72795f72d1eSYinghai Lu BUG_ON(0 == size); 72895f72d1eSYinghai Lu 729e6498040STejun Heo /* Pump up max_addr */ 730e6498040STejun Heo if (end == MEMBLOCK_ALLOC_ACCESSIBLE) 731e6498040STejun Heo end = memblock.current_limit; 732e6498040STejun Heo 733e6498040STejun Heo for (i = mem->cnt - 1; i >= 0; i--) { 734e6498040STejun Heo struct memblock_region *r = &mem->regions[i]; 735e6498040STejun Heo phys_addr_t base = max(start, r->base); 736e6498040STejun Heo phys_addr_t top = min(end, r->base + r->size); 737e6498040STejun Heo 738e6498040STejun Heo while (base < top) { 739e6498040STejun Heo phys_addr_t tbase, ret; 740e6498040STejun Heo int tnid; 741e6498040STejun Heo 742e6498040STejun Heo tbase = memblock_nid_range_rev(base, top, &tnid); 743e6498040STejun Heo if (nid == MAX_NUMNODES || tnid == nid) { 744e6498040STejun Heo ret = memblock_find_region(tbase, top, size, align); 745e6498040STejun Heo if (ret) 746e6498040STejun Heo return ret; 747e6498040STejun Heo } 748e6498040STejun Heo top = tbase; 749e6498040STejun Heo } 750e6498040STejun Heo } 751e6498040STejun Heo 752e6498040STejun Heo return 0; 753e6498040STejun Heo } 754e6498040STejun Heo 755e6498040STejun Heo phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) 756e6498040STejun Heo { 757e6498040STejun Heo phys_addr_t found; 758e6498040STejun Heo 759e6498040STejun Heo /* 760e6498040STejun Heo * We align the size to limit fragmentation. Without this, a lot of 7617f219c73SBenjamin Herrenschmidt * small allocs quickly eat up the whole reserve array on sparc 7627f219c73SBenjamin Herrenschmidt */ 763348968ebSTejun Heo size = round_up(size, align); 7647f219c73SBenjamin Herrenschmidt 765e6498040STejun Heo found = memblock_find_in_range_node(0, MEMBLOCK_ALLOC_ACCESSIBLE, 76695f72d1eSYinghai Lu size, align, nid); 7679c8c27e2STejun Heo if (found && !memblock_reserve(found, size)) 768e6498040STejun Heo return found; 76995f72d1eSYinghai Lu 7709d1e2492SBenjamin Herrenschmidt return 0; 7719d1e2492SBenjamin Herrenschmidt } 7729d1e2492SBenjamin Herrenschmidt 7739d1e2492SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 7749d1e2492SBenjamin Herrenschmidt { 7759d1e2492SBenjamin Herrenschmidt phys_addr_t res = memblock_alloc_nid(size, align, nid); 7769d1e2492SBenjamin Herrenschmidt 7779d1e2492SBenjamin Herrenschmidt if (res) 7789d1e2492SBenjamin Herrenschmidt return res; 77915fb0972STejun Heo return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 78095f72d1eSYinghai Lu } 78195f72d1eSYinghai Lu 7829d1e2492SBenjamin Herrenschmidt 7839d1e2492SBenjamin Herrenschmidt /* 7849d1e2492SBenjamin Herrenschmidt * Remaining API functions 7859d1e2492SBenjamin Herrenschmidt */ 7869d1e2492SBenjamin Herrenschmidt 78795f72d1eSYinghai Lu /* You must call memblock_analyze() before this. */ 7882898cc4cSBenjamin Herrenschmidt phys_addr_t __init memblock_phys_mem_size(void) 78995f72d1eSYinghai Lu { 7904734b594SBenjamin Herrenschmidt return memblock.memory_size; 79195f72d1eSYinghai Lu } 79295f72d1eSYinghai Lu 7930a93ebefSSam Ravnborg /* lowest address */ 7940a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 7950a93ebefSSam Ravnborg { 7960a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 7970a93ebefSSam Ravnborg } 7980a93ebefSSam Ravnborg 79910d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 80095f72d1eSYinghai Lu { 80195f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 80295f72d1eSYinghai Lu 803e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 80495f72d1eSYinghai Lu } 80595f72d1eSYinghai Lu 80695f72d1eSYinghai Lu /* You must call memblock_analyze() after this. */ 8072898cc4cSBenjamin Herrenschmidt void __init memblock_enforce_memory_limit(phys_addr_t memory_limit) 80895f72d1eSYinghai Lu { 80995f72d1eSYinghai Lu unsigned long i; 8102898cc4cSBenjamin Herrenschmidt phys_addr_t limit; 811e3239ff9SBenjamin Herrenschmidt struct memblock_region *p; 81295f72d1eSYinghai Lu 81395f72d1eSYinghai Lu if (!memory_limit) 81495f72d1eSYinghai Lu return; 81595f72d1eSYinghai Lu 81695f72d1eSYinghai Lu /* Truncate the memblock regions to satisfy the memory limit. */ 81795f72d1eSYinghai Lu limit = memory_limit; 81895f72d1eSYinghai Lu for (i = 0; i < memblock.memory.cnt; i++) { 819e3239ff9SBenjamin Herrenschmidt if (limit > memblock.memory.regions[i].size) { 820e3239ff9SBenjamin Herrenschmidt limit -= memblock.memory.regions[i].size; 82195f72d1eSYinghai Lu continue; 82295f72d1eSYinghai Lu } 82395f72d1eSYinghai Lu 824e3239ff9SBenjamin Herrenschmidt memblock.memory.regions[i].size = limit; 82595f72d1eSYinghai Lu memblock.memory.cnt = i + 1; 82695f72d1eSYinghai Lu break; 82795f72d1eSYinghai Lu } 82895f72d1eSYinghai Lu 82995f72d1eSYinghai Lu memory_limit = memblock_end_of_DRAM(); 83095f72d1eSYinghai Lu 83195f72d1eSYinghai Lu /* And truncate any reserves above the limit also. */ 83295f72d1eSYinghai Lu for (i = 0; i < memblock.reserved.cnt; i++) { 833e3239ff9SBenjamin Herrenschmidt p = &memblock.reserved.regions[i]; 83495f72d1eSYinghai Lu 83595f72d1eSYinghai Lu if (p->base > memory_limit) 83695f72d1eSYinghai Lu p->size = 0; 83795f72d1eSYinghai Lu else if ((p->base + p->size) > memory_limit) 83895f72d1eSYinghai Lu p->size = memory_limit - p->base; 83995f72d1eSYinghai Lu 84095f72d1eSYinghai Lu if (p->size == 0) { 84195f72d1eSYinghai Lu memblock_remove_region(&memblock.reserved, i); 84295f72d1eSYinghai Lu i--; 84395f72d1eSYinghai Lu } 84495f72d1eSYinghai Lu } 84595f72d1eSYinghai Lu } 84695f72d1eSYinghai Lu 847cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 84872d4b0b4SBenjamin Herrenschmidt { 84972d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 85072d4b0b4SBenjamin Herrenschmidt 85172d4b0b4SBenjamin Herrenschmidt do { 85272d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 85372d4b0b4SBenjamin Herrenschmidt 85472d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 85572d4b0b4SBenjamin Herrenschmidt right = mid; 85672d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 85772d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 85872d4b0b4SBenjamin Herrenschmidt left = mid + 1; 85972d4b0b4SBenjamin Herrenschmidt else 86072d4b0b4SBenjamin Herrenschmidt return mid; 86172d4b0b4SBenjamin Herrenschmidt } while (left < right); 86272d4b0b4SBenjamin Herrenschmidt return -1; 86372d4b0b4SBenjamin Herrenschmidt } 86472d4b0b4SBenjamin Herrenschmidt 8652898cc4cSBenjamin Herrenschmidt int __init memblock_is_reserved(phys_addr_t addr) 86695f72d1eSYinghai Lu { 86772d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 86895f72d1eSYinghai Lu } 86972d4b0b4SBenjamin Herrenschmidt 8703661ca66SYinghai Lu int __init_memblock memblock_is_memory(phys_addr_t addr) 87172d4b0b4SBenjamin Herrenschmidt { 87272d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 87372d4b0b4SBenjamin Herrenschmidt } 87472d4b0b4SBenjamin Herrenschmidt 8753661ca66SYinghai Lu int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 87672d4b0b4SBenjamin Herrenschmidt { 877abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 878*eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 87972d4b0b4SBenjamin Herrenschmidt 88072d4b0b4SBenjamin Herrenschmidt if (idx == -1) 88195f72d1eSYinghai Lu return 0; 882abb65272STomi Valkeinen return memblock.memory.regions[idx].base <= base && 883abb65272STomi Valkeinen (memblock.memory.regions[idx].base + 884*eb18f1b5STejun Heo memblock.memory.regions[idx].size) >= end; 88595f72d1eSYinghai Lu } 88695f72d1eSYinghai Lu 88710d06439SYinghai Lu int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 88895f72d1eSYinghai Lu { 889*eb18f1b5STejun Heo memblock_cap_size(base, &size); 890f1c2c19cSBenjamin Herrenschmidt return memblock_overlaps_region(&memblock.reserved, base, size) >= 0; 89195f72d1eSYinghai Lu } 89295f72d1eSYinghai Lu 893e63075a3SBenjamin Herrenschmidt 8943661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 895e63075a3SBenjamin Herrenschmidt { 896e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 897e63075a3SBenjamin Herrenschmidt } 898e63075a3SBenjamin Herrenschmidt 8997c0caeb8STejun Heo static void __init_memblock memblock_dump(struct memblock_type *type, char *name) 9006ed311b2SBenjamin Herrenschmidt { 9016ed311b2SBenjamin Herrenschmidt unsigned long long base, size; 9026ed311b2SBenjamin Herrenschmidt int i; 9036ed311b2SBenjamin Herrenschmidt 9047c0caeb8STejun Heo pr_info(" %s.cnt = 0x%lx\n", name, type->cnt); 9056ed311b2SBenjamin Herrenschmidt 9067c0caeb8STejun Heo for (i = 0; i < type->cnt; i++) { 9077c0caeb8STejun Heo struct memblock_region *rgn = &type->regions[i]; 9087c0caeb8STejun Heo char nid_buf[32] = ""; 9096ed311b2SBenjamin Herrenschmidt 9107c0caeb8STejun Heo base = rgn->base; 9117c0caeb8STejun Heo size = rgn->size; 9127c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 9137c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 9147c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 9157c0caeb8STejun Heo memblock_get_region_node(rgn)); 9167c0caeb8STejun Heo #endif 9177c0caeb8STejun Heo pr_info(" %s[%#x]\t[%#016llx-%#016llx], %#llx bytes%s\n", 9187c0caeb8STejun Heo name, i, base, base + size - 1, size, nid_buf); 9196ed311b2SBenjamin Herrenschmidt } 9206ed311b2SBenjamin Herrenschmidt } 9216ed311b2SBenjamin Herrenschmidt 9224ff7b82fSTejun Heo void __init_memblock __memblock_dump_all(void) 9236ed311b2SBenjamin Herrenschmidt { 9246ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 9256ed311b2SBenjamin Herrenschmidt pr_info(" memory size = 0x%llx\n", (unsigned long long)memblock.memory_size); 9266ed311b2SBenjamin Herrenschmidt 9276ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.memory, "memory"); 9286ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.reserved, "reserved"); 9296ed311b2SBenjamin Herrenschmidt } 9306ed311b2SBenjamin Herrenschmidt 9316ed311b2SBenjamin Herrenschmidt void __init memblock_analyze(void) 9326ed311b2SBenjamin Herrenschmidt { 9336ed311b2SBenjamin Herrenschmidt int i; 9346ed311b2SBenjamin Herrenschmidt 9356ed311b2SBenjamin Herrenschmidt memblock.memory_size = 0; 9366ed311b2SBenjamin Herrenschmidt 9376ed311b2SBenjamin Herrenschmidt for (i = 0; i < memblock.memory.cnt; i++) 9386ed311b2SBenjamin Herrenschmidt memblock.memory_size += memblock.memory.regions[i].size; 939142b45a7SBenjamin Herrenschmidt 940142b45a7SBenjamin Herrenschmidt /* We allow resizing from there */ 941142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 9426ed311b2SBenjamin Herrenschmidt } 9436ed311b2SBenjamin Herrenschmidt 9446ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 9456ed311b2SBenjamin Herrenschmidt { 9466ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 9476ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 9486ed311b2SBenjamin Herrenschmidt return 0; 9496ed311b2SBenjamin Herrenschmidt } 9506ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 9516ed311b2SBenjamin Herrenschmidt 952c378ddd5STejun Heo #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) 9536d03b885SBenjamin Herrenschmidt 9546d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 9556d03b885SBenjamin Herrenschmidt { 9566d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 9576d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 9586d03b885SBenjamin Herrenschmidt int i; 9596d03b885SBenjamin Herrenschmidt 9606d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 9616d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 9626d03b885SBenjamin Herrenschmidt seq_printf(m, "%4d: ", i); 9636d03b885SBenjamin Herrenschmidt if (sizeof(phys_addr_t) == 4) 9646d03b885SBenjamin Herrenschmidt seq_printf(m, "0x%08lx..0x%08lx\n", 9656d03b885SBenjamin Herrenschmidt (unsigned long)reg->base, 9666d03b885SBenjamin Herrenschmidt (unsigned long)(reg->base + reg->size - 1)); 9676d03b885SBenjamin Herrenschmidt else 9686d03b885SBenjamin Herrenschmidt seq_printf(m, "0x%016llx..0x%016llx\n", 9696d03b885SBenjamin Herrenschmidt (unsigned long long)reg->base, 9706d03b885SBenjamin Herrenschmidt (unsigned long long)(reg->base + reg->size - 1)); 9716d03b885SBenjamin Herrenschmidt 9726d03b885SBenjamin Herrenschmidt } 9736d03b885SBenjamin Herrenschmidt return 0; 9746d03b885SBenjamin Herrenschmidt } 9756d03b885SBenjamin Herrenschmidt 9766d03b885SBenjamin Herrenschmidt static int memblock_debug_open(struct inode *inode, struct file *file) 9776d03b885SBenjamin Herrenschmidt { 9786d03b885SBenjamin Herrenschmidt return single_open(file, memblock_debug_show, inode->i_private); 9796d03b885SBenjamin Herrenschmidt } 9806d03b885SBenjamin Herrenschmidt 9816d03b885SBenjamin Herrenschmidt static const struct file_operations memblock_debug_fops = { 9826d03b885SBenjamin Herrenschmidt .open = memblock_debug_open, 9836d03b885SBenjamin Herrenschmidt .read = seq_read, 9846d03b885SBenjamin Herrenschmidt .llseek = seq_lseek, 9856d03b885SBenjamin Herrenschmidt .release = single_release, 9866d03b885SBenjamin Herrenschmidt }; 9876d03b885SBenjamin Herrenschmidt 9886d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 9896d03b885SBenjamin Herrenschmidt { 9906d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 9916d03b885SBenjamin Herrenschmidt if (!root) 9926d03b885SBenjamin Herrenschmidt return -ENXIO; 9936d03b885SBenjamin Herrenschmidt debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); 9946d03b885SBenjamin Herrenschmidt debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); 9956d03b885SBenjamin Herrenschmidt 9966d03b885SBenjamin Herrenschmidt return 0; 9976d03b885SBenjamin Herrenschmidt } 9986d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 9996d03b885SBenjamin Herrenschmidt 10006d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 1001