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 23*fe091c20STejun Heo static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; 24*fe091c20STejun Heo static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; 25*fe091c20STejun Heo 26*fe091c20STejun Heo struct memblock memblock __initdata_memblock = { 27*fe091c20STejun Heo .memory.regions = memblock_memory_init_regions, 28*fe091c20STejun Heo .memory.cnt = 1, /* empty dummy entry */ 29*fe091c20STejun Heo .memory.max = INIT_MEMBLOCK_REGIONS, 30*fe091c20STejun Heo 31*fe091c20STejun Heo .reserved.regions = memblock_reserved_init_regions, 32*fe091c20STejun Heo .reserved.cnt = 1, /* empty dummy entry */ 33*fe091c20STejun Heo .reserved.max = INIT_MEMBLOCK_REGIONS, 34*fe091c20STejun Heo 35*fe091c20STejun Heo .current_limit = MEMBLOCK_ALLOC_ANYWHERE, 36*fe091c20STejun 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 526ed311b2SBenjamin Herrenschmidt /* 536ed311b2SBenjamin Herrenschmidt * Address comparison utilities 546ed311b2SBenjamin Herrenschmidt */ 5510d06439SYinghai Lu static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, 562898cc4cSBenjamin Herrenschmidt phys_addr_t base2, phys_addr_t size2) 5795f72d1eSYinghai Lu { 5895f72d1eSYinghai Lu return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); 5995f72d1eSYinghai Lu } 6095f72d1eSYinghai Lu 612d7d3eb2SH Hartley Sweeten static long __init_memblock memblock_overlaps_region(struct memblock_type *type, 622d7d3eb2SH Hartley Sweeten phys_addr_t base, phys_addr_t size) 636ed311b2SBenjamin Herrenschmidt { 646ed311b2SBenjamin Herrenschmidt unsigned long i; 656ed311b2SBenjamin Herrenschmidt 666ed311b2SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 676ed311b2SBenjamin Herrenschmidt phys_addr_t rgnbase = type->regions[i].base; 686ed311b2SBenjamin Herrenschmidt phys_addr_t rgnsize = type->regions[i].size; 696ed311b2SBenjamin Herrenschmidt if (memblock_addrs_overlap(base, size, rgnbase, rgnsize)) 706ed311b2SBenjamin Herrenschmidt break; 716ed311b2SBenjamin Herrenschmidt } 726ed311b2SBenjamin Herrenschmidt 736ed311b2SBenjamin Herrenschmidt return (i < type->cnt) ? i : -1; 746ed311b2SBenjamin Herrenschmidt } 756ed311b2SBenjamin Herrenschmidt 766ed311b2SBenjamin Herrenschmidt /* 776ed311b2SBenjamin Herrenschmidt * Find, allocate, deallocate or reserve unreserved regions. All allocations 786ed311b2SBenjamin Herrenschmidt * are top-down. 796ed311b2SBenjamin Herrenschmidt */ 806ed311b2SBenjamin Herrenschmidt 81cd79481dSYinghai Lu static phys_addr_t __init_memblock memblock_find_region(phys_addr_t start, phys_addr_t end, 826ed311b2SBenjamin Herrenschmidt phys_addr_t size, phys_addr_t align) 836ed311b2SBenjamin Herrenschmidt { 846ed311b2SBenjamin Herrenschmidt phys_addr_t base, res_base; 856ed311b2SBenjamin Herrenschmidt long j; 866ed311b2SBenjamin Herrenschmidt 87f1af98c7SYinghai Lu /* In case, huge size is requested */ 88f1af98c7SYinghai Lu if (end < size) 891f5026a7STejun Heo return 0; 90f1af98c7SYinghai Lu 91348968ebSTejun Heo base = round_down(end - size, align); 92f1af98c7SYinghai Lu 9325818f0fSBenjamin Herrenschmidt /* Prevent allocations returning 0 as it's also used to 9425818f0fSBenjamin Herrenschmidt * indicate an allocation failure 9525818f0fSBenjamin Herrenschmidt */ 9625818f0fSBenjamin Herrenschmidt if (start == 0) 9725818f0fSBenjamin Herrenschmidt start = PAGE_SIZE; 9825818f0fSBenjamin Herrenschmidt 996ed311b2SBenjamin Herrenschmidt while (start <= base) { 1006ed311b2SBenjamin Herrenschmidt j = memblock_overlaps_region(&memblock.reserved, base, size); 1016ed311b2SBenjamin Herrenschmidt if (j < 0) 1026ed311b2SBenjamin Herrenschmidt return base; 1036ed311b2SBenjamin Herrenschmidt res_base = memblock.reserved.regions[j].base; 1046ed311b2SBenjamin Herrenschmidt if (res_base < size) 1056ed311b2SBenjamin Herrenschmidt break; 106348968ebSTejun Heo base = round_down(res_base - size, align); 1076ed311b2SBenjamin Herrenschmidt } 1086ed311b2SBenjamin Herrenschmidt 1091f5026a7STejun Heo return 0; 1106ed311b2SBenjamin Herrenschmidt } 1116ed311b2SBenjamin Herrenschmidt 112fc769a8eSTejun Heo /* 113fc769a8eSTejun Heo * Find a free area with specified alignment in a specific range. 114fc769a8eSTejun Heo */ 115fc769a8eSTejun Heo phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, phys_addr_t end, 116fc769a8eSTejun Heo phys_addr_t size, phys_addr_t align) 1176ed311b2SBenjamin Herrenschmidt { 1186ed311b2SBenjamin Herrenschmidt long i; 1196ed311b2SBenjamin Herrenschmidt 1206ed311b2SBenjamin Herrenschmidt BUG_ON(0 == size); 1216ed311b2SBenjamin Herrenschmidt 1226ed311b2SBenjamin Herrenschmidt /* Pump up max_addr */ 123fef501d4SBenjamin Herrenschmidt if (end == MEMBLOCK_ALLOC_ACCESSIBLE) 124fef501d4SBenjamin Herrenschmidt end = memblock.current_limit; 1256ed311b2SBenjamin Herrenschmidt 1266ed311b2SBenjamin Herrenschmidt /* We do a top-down search, this tends to limit memory 1276ed311b2SBenjamin Herrenschmidt * fragmentation by keeping early boot allocs near the 1286ed311b2SBenjamin Herrenschmidt * top of memory 1296ed311b2SBenjamin Herrenschmidt */ 1306ed311b2SBenjamin Herrenschmidt for (i = memblock.memory.cnt - 1; i >= 0; i--) { 1316ed311b2SBenjamin Herrenschmidt phys_addr_t memblockbase = memblock.memory.regions[i].base; 1326ed311b2SBenjamin Herrenschmidt phys_addr_t memblocksize = memblock.memory.regions[i].size; 133fef501d4SBenjamin Herrenschmidt phys_addr_t bottom, top, found; 1346ed311b2SBenjamin Herrenschmidt 1356ed311b2SBenjamin Herrenschmidt if (memblocksize < size) 1366ed311b2SBenjamin Herrenschmidt continue; 137fef501d4SBenjamin Herrenschmidt if ((memblockbase + memblocksize) <= start) 138fef501d4SBenjamin Herrenschmidt break; 139fef501d4SBenjamin Herrenschmidt bottom = max(memblockbase, start); 140fef501d4SBenjamin Herrenschmidt top = min(memblockbase + memblocksize, end); 141fef501d4SBenjamin Herrenschmidt if (bottom >= top) 142fef501d4SBenjamin Herrenschmidt continue; 143fef501d4SBenjamin Herrenschmidt found = memblock_find_region(bottom, top, size, align); 1441f5026a7STejun Heo if (found) 145fef501d4SBenjamin Herrenschmidt return found; 1466ed311b2SBenjamin Herrenschmidt } 1471f5026a7STejun Heo return 0; 1486ed311b2SBenjamin Herrenschmidt } 1496ed311b2SBenjamin Herrenschmidt 1505303b68fSYinghai Lu /* 1517950c407SYinghai Lu * Free memblock.reserved.regions 1527950c407SYinghai Lu */ 1537950c407SYinghai Lu int __init_memblock memblock_free_reserved_regions(void) 1547950c407SYinghai Lu { 1557950c407SYinghai Lu if (memblock.reserved.regions == memblock_reserved_init_regions) 1567950c407SYinghai Lu return 0; 1577950c407SYinghai Lu 1587950c407SYinghai Lu return memblock_free(__pa(memblock.reserved.regions), 1597950c407SYinghai Lu sizeof(struct memblock_region) * memblock.reserved.max); 1607950c407SYinghai Lu } 1617950c407SYinghai Lu 1627950c407SYinghai Lu /* 1637950c407SYinghai Lu * Reserve memblock.reserved.regions 1647950c407SYinghai Lu */ 1657950c407SYinghai Lu int __init_memblock memblock_reserve_reserved_regions(void) 1667950c407SYinghai Lu { 1677950c407SYinghai Lu if (memblock.reserved.regions == memblock_reserved_init_regions) 1687950c407SYinghai Lu return 0; 1697950c407SYinghai Lu 1707950c407SYinghai Lu return memblock_reserve(__pa(memblock.reserved.regions), 1717950c407SYinghai Lu sizeof(struct memblock_region) * memblock.reserved.max); 1727950c407SYinghai Lu } 1737950c407SYinghai Lu 17410d06439SYinghai Lu static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) 17595f72d1eSYinghai Lu { 1767c0caeb8STejun Heo memmove(&type->regions[r], &type->regions[r + 1], 1777c0caeb8STejun Heo (type->cnt - (r + 1)) * sizeof(type->regions[r])); 178e3239ff9SBenjamin Herrenschmidt type->cnt--; 17995f72d1eSYinghai Lu 1808f7a6605SBenjamin Herrenschmidt /* Special case for empty arrays */ 1818f7a6605SBenjamin Herrenschmidt if (type->cnt == 0) { 1828f7a6605SBenjamin Herrenschmidt type->cnt = 1; 1838f7a6605SBenjamin Herrenschmidt type->regions[0].base = 0; 1848f7a6605SBenjamin Herrenschmidt type->regions[0].size = 0; 1857c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 1868f7a6605SBenjamin Herrenschmidt } 18795f72d1eSYinghai Lu } 18895f72d1eSYinghai Lu 18910d06439SYinghai Lu static int __init_memblock memblock_double_array(struct memblock_type *type) 190142b45a7SBenjamin Herrenschmidt { 191142b45a7SBenjamin Herrenschmidt struct memblock_region *new_array, *old_array; 192142b45a7SBenjamin Herrenschmidt phys_addr_t old_size, new_size, addr; 193142b45a7SBenjamin Herrenschmidt int use_slab = slab_is_available(); 194142b45a7SBenjamin Herrenschmidt 195142b45a7SBenjamin Herrenschmidt /* We don't allow resizing until we know about the reserved regions 196142b45a7SBenjamin Herrenschmidt * of memory that aren't suitable for allocation 197142b45a7SBenjamin Herrenschmidt */ 198142b45a7SBenjamin Herrenschmidt if (!memblock_can_resize) 199142b45a7SBenjamin Herrenschmidt return -1; 200142b45a7SBenjamin Herrenschmidt 201142b45a7SBenjamin Herrenschmidt /* Calculate new doubled size */ 202142b45a7SBenjamin Herrenschmidt old_size = type->max * sizeof(struct memblock_region); 203142b45a7SBenjamin Herrenschmidt new_size = old_size << 1; 204142b45a7SBenjamin Herrenschmidt 205142b45a7SBenjamin Herrenschmidt /* Try to find some space for it. 206142b45a7SBenjamin Herrenschmidt * 207142b45a7SBenjamin Herrenschmidt * WARNING: We assume that either slab_is_available() and we use it or 208142b45a7SBenjamin Herrenschmidt * we use MEMBLOCK for allocations. That means that this is unsafe to use 209142b45a7SBenjamin Herrenschmidt * when bootmem is currently active (unless bootmem itself is implemented 210142b45a7SBenjamin Herrenschmidt * on top of MEMBLOCK which isn't the case yet) 211142b45a7SBenjamin Herrenschmidt * 212142b45a7SBenjamin Herrenschmidt * This should however not be an issue for now, as we currently only 213142b45a7SBenjamin Herrenschmidt * call into MEMBLOCK while it's still active, or much later when slab is 214142b45a7SBenjamin Herrenschmidt * active for memory hotplug operations 215142b45a7SBenjamin Herrenschmidt */ 216142b45a7SBenjamin Herrenschmidt if (use_slab) { 217142b45a7SBenjamin Herrenschmidt new_array = kmalloc(new_size, GFP_KERNEL); 2181f5026a7STejun Heo addr = new_array ? __pa(new_array) : 0; 219142b45a7SBenjamin Herrenschmidt } else 220fc769a8eSTejun Heo addr = memblock_find_in_range(0, MEMBLOCK_ALLOC_ACCESSIBLE, new_size, sizeof(phys_addr_t)); 2211f5026a7STejun Heo if (!addr) { 222142b45a7SBenjamin Herrenschmidt pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", 223142b45a7SBenjamin Herrenschmidt memblock_type_name(type), type->max, type->max * 2); 224142b45a7SBenjamin Herrenschmidt return -1; 225142b45a7SBenjamin Herrenschmidt } 226142b45a7SBenjamin Herrenschmidt new_array = __va(addr); 227142b45a7SBenjamin Herrenschmidt 228ea9e4376SYinghai Lu memblock_dbg("memblock: %s array is doubled to %ld at [%#010llx-%#010llx]", 229ea9e4376SYinghai Lu memblock_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size - 1); 230ea9e4376SYinghai Lu 231142b45a7SBenjamin Herrenschmidt /* Found space, we now need to move the array over before 232142b45a7SBenjamin Herrenschmidt * we add the reserved region since it may be our reserved 233142b45a7SBenjamin Herrenschmidt * array itself that is full. 234142b45a7SBenjamin Herrenschmidt */ 235142b45a7SBenjamin Herrenschmidt memcpy(new_array, type->regions, old_size); 236142b45a7SBenjamin Herrenschmidt memset(new_array + type->max, 0, old_size); 237142b45a7SBenjamin Herrenschmidt old_array = type->regions; 238142b45a7SBenjamin Herrenschmidt type->regions = new_array; 239142b45a7SBenjamin Herrenschmidt type->max <<= 1; 240142b45a7SBenjamin Herrenschmidt 241142b45a7SBenjamin Herrenschmidt /* If we use SLAB that's it, we are done */ 242142b45a7SBenjamin Herrenschmidt if (use_slab) 243142b45a7SBenjamin Herrenschmidt return 0; 244142b45a7SBenjamin Herrenschmidt 245142b45a7SBenjamin Herrenschmidt /* Add the new reserved region now. Should not fail ! */ 2469c8c27e2STejun Heo BUG_ON(memblock_reserve(addr, new_size)); 247142b45a7SBenjamin Herrenschmidt 248142b45a7SBenjamin Herrenschmidt /* If the array wasn't our static init one, then free it. We only do 249142b45a7SBenjamin Herrenschmidt * that before SLAB is available as later on, we don't know whether 250142b45a7SBenjamin Herrenschmidt * to use kfree or free_bootmem_pages(). Shouldn't be a big deal 251142b45a7SBenjamin Herrenschmidt * anyways 252142b45a7SBenjamin Herrenschmidt */ 253142b45a7SBenjamin Herrenschmidt if (old_array != memblock_memory_init_regions && 254142b45a7SBenjamin Herrenschmidt old_array != memblock_reserved_init_regions) 255142b45a7SBenjamin Herrenschmidt memblock_free(__pa(old_array), old_size); 256142b45a7SBenjamin Herrenschmidt 257142b45a7SBenjamin Herrenschmidt return 0; 258142b45a7SBenjamin Herrenschmidt } 259142b45a7SBenjamin Herrenschmidt 260784656f9STejun Heo /** 261784656f9STejun Heo * memblock_merge_regions - merge neighboring compatible regions 262784656f9STejun Heo * @type: memblock type to scan 263784656f9STejun Heo * 264784656f9STejun Heo * Scan @type and merge neighboring compatible regions. 265784656f9STejun Heo */ 266784656f9STejun Heo static void __init_memblock memblock_merge_regions(struct memblock_type *type) 267784656f9STejun Heo { 268784656f9STejun Heo int i = 0; 269784656f9STejun Heo 270784656f9STejun Heo /* cnt never goes below 1 */ 271784656f9STejun Heo while (i < type->cnt - 1) { 272784656f9STejun Heo struct memblock_region *this = &type->regions[i]; 273784656f9STejun Heo struct memblock_region *next = &type->regions[i + 1]; 274784656f9STejun Heo 2757c0caeb8STejun Heo if (this->base + this->size != next->base || 2767c0caeb8STejun Heo memblock_get_region_node(this) != 2777c0caeb8STejun Heo memblock_get_region_node(next)) { 278784656f9STejun Heo BUG_ON(this->base + this->size > next->base); 279784656f9STejun Heo i++; 280784656f9STejun Heo continue; 281784656f9STejun Heo } 282784656f9STejun Heo 283784656f9STejun Heo this->size += next->size; 284784656f9STejun Heo memmove(next, next + 1, (type->cnt - (i + 1)) * sizeof(*next)); 285784656f9STejun Heo type->cnt--; 286784656f9STejun Heo } 287784656f9STejun Heo } 288784656f9STejun Heo 289784656f9STejun Heo /** 290784656f9STejun Heo * memblock_insert_region - insert new memblock region 291784656f9STejun Heo * @type: memblock type to insert into 292784656f9STejun Heo * @idx: index for the insertion point 293784656f9STejun Heo * @base: base address of the new region 294784656f9STejun Heo * @size: size of the new region 295784656f9STejun Heo * 296784656f9STejun Heo * Insert new memblock region [@base,@base+@size) into @type at @idx. 297784656f9STejun Heo * @type must already have extra room to accomodate the new region. 298784656f9STejun Heo */ 299784656f9STejun Heo static void __init_memblock memblock_insert_region(struct memblock_type *type, 300784656f9STejun Heo int idx, phys_addr_t base, 3017c0caeb8STejun Heo phys_addr_t size, int nid) 302784656f9STejun Heo { 303784656f9STejun Heo struct memblock_region *rgn = &type->regions[idx]; 304784656f9STejun Heo 305784656f9STejun Heo BUG_ON(type->cnt >= type->max); 306784656f9STejun Heo memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); 307784656f9STejun Heo rgn->base = base; 308784656f9STejun Heo rgn->size = size; 3097c0caeb8STejun Heo memblock_set_region_node(rgn, nid); 310784656f9STejun Heo type->cnt++; 311784656f9STejun Heo } 312784656f9STejun Heo 313784656f9STejun Heo /** 314784656f9STejun Heo * memblock_add_region - add new memblock region 315784656f9STejun Heo * @type: memblock type to add new region into 316784656f9STejun Heo * @base: base address of the new region 317784656f9STejun Heo * @size: size of the new region 318784656f9STejun Heo * 319784656f9STejun Heo * Add new memblock region [@base,@base+@size) into @type. The new region 320784656f9STejun Heo * is allowed to overlap with existing ones - overlaps don't affect already 321784656f9STejun Heo * existing regions. @type is guaranteed to be minimal (all neighbouring 322784656f9STejun Heo * compatible regions are merged) after the addition. 323784656f9STejun Heo * 324784656f9STejun Heo * RETURNS: 325784656f9STejun Heo * 0 on success, -errno on failure. 326784656f9STejun Heo */ 327581adcbeSTejun Heo static int __init_memblock memblock_add_region(struct memblock_type *type, 3288f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 32995f72d1eSYinghai Lu { 330784656f9STejun Heo bool insert = false; 331784656f9STejun Heo phys_addr_t obase = base, end = base + size; 332784656f9STejun Heo int i, nr_new; 33395f72d1eSYinghai Lu 334784656f9STejun Heo /* special case for empty array */ 335784656f9STejun Heo if (type->regions[0].size == 0) { 336784656f9STejun Heo WARN_ON(type->cnt != 1); 337784656f9STejun Heo type->regions[0].base = base; 338784656f9STejun Heo type->regions[0].size = size; 3397c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 340784656f9STejun Heo return 0; 341784656f9STejun Heo } 342784656f9STejun Heo repeat: 343784656f9STejun Heo /* 344784656f9STejun Heo * The following is executed twice. Once with %false @insert and 345784656f9STejun Heo * then with %true. The first counts the number of regions needed 346784656f9STejun Heo * to accomodate the new area. The second actually inserts them. 347784656f9STejun Heo */ 348784656f9STejun Heo base = obase; 349784656f9STejun Heo nr_new = 0; 350784656f9STejun Heo 3518f7a6605SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 3528f7a6605SBenjamin Herrenschmidt struct memblock_region *rgn = &type->regions[i]; 353784656f9STejun Heo phys_addr_t rbase = rgn->base; 354784656f9STejun Heo phys_addr_t rend = rbase + rgn->size; 3558f7a6605SBenjamin Herrenschmidt 356784656f9STejun Heo if (rbase >= end) 3578f7a6605SBenjamin Herrenschmidt break; 358784656f9STejun Heo if (rend <= base) 359784656f9STejun Heo continue; 360784656f9STejun Heo /* 361784656f9STejun Heo * @rgn overlaps. If it separates the lower part of new 362784656f9STejun Heo * area, insert that portion. 3638f7a6605SBenjamin Herrenschmidt */ 364784656f9STejun Heo if (rbase > base) { 365784656f9STejun Heo nr_new++; 366784656f9STejun Heo if (insert) 367784656f9STejun Heo memblock_insert_region(type, i++, base, 3687c0caeb8STejun Heo rbase - base, MAX_NUMNODES); 369784656f9STejun Heo } 370784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 371784656f9STejun Heo base = min(rend, end); 3728f7a6605SBenjamin Herrenschmidt } 3738f7a6605SBenjamin Herrenschmidt 374784656f9STejun Heo /* insert the remaining portion */ 375784656f9STejun Heo if (base < end) { 376784656f9STejun Heo nr_new++; 377784656f9STejun Heo if (insert) 3787c0caeb8STejun Heo memblock_insert_region(type, i, base, end - base, 3797c0caeb8STejun Heo MAX_NUMNODES); 3808f7a6605SBenjamin Herrenschmidt } 3818f7a6605SBenjamin Herrenschmidt 382784656f9STejun Heo /* 383784656f9STejun Heo * If this was the first round, resize array and repeat for actual 384784656f9STejun Heo * insertions; otherwise, merge and return. 3858f7a6605SBenjamin Herrenschmidt */ 386784656f9STejun Heo if (!insert) { 387784656f9STejun Heo while (type->cnt + nr_new > type->max) 388784656f9STejun Heo if (memblock_double_array(type) < 0) 389784656f9STejun Heo return -ENOMEM; 390784656f9STejun Heo insert = true; 391784656f9STejun Heo goto repeat; 39295f72d1eSYinghai Lu } else { 393784656f9STejun Heo memblock_merge_regions(type); 39495f72d1eSYinghai Lu return 0; 39595f72d1eSYinghai Lu } 396784656f9STejun Heo } 39795f72d1eSYinghai Lu 398581adcbeSTejun Heo int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 39995f72d1eSYinghai Lu { 400e3239ff9SBenjamin Herrenschmidt return memblock_add_region(&memblock.memory, base, size); 40195f72d1eSYinghai Lu } 40295f72d1eSYinghai Lu 403581adcbeSTejun Heo static int __init_memblock __memblock_remove(struct memblock_type *type, 4048f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 40595f72d1eSYinghai Lu { 4062898cc4cSBenjamin Herrenschmidt phys_addr_t end = base + size; 40795f72d1eSYinghai Lu int i; 40895f72d1eSYinghai Lu 4098f7a6605SBenjamin Herrenschmidt /* Walk through the array for collisions */ 410e3239ff9SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 4118f7a6605SBenjamin Herrenschmidt struct memblock_region *rgn = &type->regions[i]; 4128f7a6605SBenjamin Herrenschmidt phys_addr_t rend = rgn->base + rgn->size; 41395f72d1eSYinghai Lu 4148f7a6605SBenjamin Herrenschmidt /* Nothing more to do, exit */ 4158f7a6605SBenjamin Herrenschmidt if (rgn->base > end || rgn->size == 0) 4168f7a6605SBenjamin Herrenschmidt break; 4178f7a6605SBenjamin Herrenschmidt 4188f7a6605SBenjamin Herrenschmidt /* If we fully enclose the block, drop it */ 4198f7a6605SBenjamin Herrenschmidt if (base <= rgn->base && end >= rend) { 4208f7a6605SBenjamin Herrenschmidt memblock_remove_region(type, i--); 4218f7a6605SBenjamin Herrenschmidt continue; 4228f7a6605SBenjamin Herrenschmidt } 4238f7a6605SBenjamin Herrenschmidt 4248f7a6605SBenjamin Herrenschmidt /* If we are fully enclosed within a block 4258f7a6605SBenjamin Herrenschmidt * then we need to split it and we are done 4268f7a6605SBenjamin Herrenschmidt */ 4278f7a6605SBenjamin Herrenschmidt if (base > rgn->base && end < rend) { 4288f7a6605SBenjamin Herrenschmidt rgn->size = base - rgn->base; 4298f7a6605SBenjamin Herrenschmidt if (!memblock_add_region(type, end, rend - end)) 4308f7a6605SBenjamin Herrenschmidt return 0; 4318f7a6605SBenjamin Herrenschmidt /* Failure to split is bad, we at least 4328f7a6605SBenjamin Herrenschmidt * restore the block before erroring 4338f7a6605SBenjamin Herrenschmidt */ 4348f7a6605SBenjamin Herrenschmidt rgn->size = rend - rgn->base; 4358f7a6605SBenjamin Herrenschmidt WARN_ON(1); 4368f7a6605SBenjamin Herrenschmidt return -1; 4378f7a6605SBenjamin Herrenschmidt } 4388f7a6605SBenjamin Herrenschmidt 4398f7a6605SBenjamin Herrenschmidt /* Check if we need to trim the bottom of a block */ 4408f7a6605SBenjamin Herrenschmidt if (rgn->base < end && rend > end) { 4418f7a6605SBenjamin Herrenschmidt rgn->size -= end - rgn->base; 4428f7a6605SBenjamin Herrenschmidt rgn->base = end; 44395f72d1eSYinghai Lu break; 44495f72d1eSYinghai Lu } 44595f72d1eSYinghai Lu 4468f7a6605SBenjamin Herrenschmidt /* And check if we need to trim the top of a block */ 4478f7a6605SBenjamin Herrenschmidt if (base < rend) 4488f7a6605SBenjamin Herrenschmidt rgn->size -= rend - base; 44995f72d1eSYinghai Lu 45095f72d1eSYinghai Lu } 45195f72d1eSYinghai Lu return 0; 45295f72d1eSYinghai Lu } 45395f72d1eSYinghai Lu 454581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 45595f72d1eSYinghai Lu { 45695f72d1eSYinghai Lu return __memblock_remove(&memblock.memory, base, size); 45795f72d1eSYinghai Lu } 45895f72d1eSYinghai Lu 459581adcbeSTejun Heo int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) 46095f72d1eSYinghai Lu { 46124aa0788STejun Heo memblock_dbg(" memblock_free: [%#016llx-%#016llx] %pF\n", 462a150439cSH. Peter Anvin (unsigned long long)base, 463a150439cSH. Peter Anvin (unsigned long long)base + size, 464a150439cSH. Peter Anvin (void *)_RET_IP_); 46524aa0788STejun Heo 46695f72d1eSYinghai Lu return __memblock_remove(&memblock.reserved, base, size); 46795f72d1eSYinghai Lu } 46895f72d1eSYinghai Lu 469581adcbeSTejun Heo int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 47095f72d1eSYinghai Lu { 471e3239ff9SBenjamin Herrenschmidt struct memblock_type *_rgn = &memblock.reserved; 47295f72d1eSYinghai Lu 47324aa0788STejun Heo memblock_dbg("memblock_reserve: [%#016llx-%#016llx] %pF\n", 474a150439cSH. Peter Anvin (unsigned long long)base, 475a150439cSH. Peter Anvin (unsigned long long)base + size, 476a150439cSH. Peter Anvin (void *)_RET_IP_); 47795f72d1eSYinghai Lu BUG_ON(0 == size); 47895f72d1eSYinghai Lu 47995f72d1eSYinghai Lu return memblock_add_region(_rgn, base, size); 48095f72d1eSYinghai Lu } 48195f72d1eSYinghai Lu 48235fd0808STejun Heo /** 48335fd0808STejun Heo * __next_free_mem_range - next function for for_each_free_mem_range() 48435fd0808STejun Heo * @idx: pointer to u64 loop variable 48535fd0808STejun Heo * @nid: nid: node selector, %MAX_NUMNODES for all nodes 48635fd0808STejun Heo * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 48735fd0808STejun Heo * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 48835fd0808STejun Heo * @p_nid: ptr to int for nid of the range, can be %NULL 48935fd0808STejun Heo * 49035fd0808STejun Heo * Find the first free area from *@idx which matches @nid, fill the out 49135fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 49235fd0808STejun Heo * *@idx contains index into memory region and the upper 32bit indexes the 49335fd0808STejun Heo * areas before each reserved region. For example, if reserved regions 49435fd0808STejun Heo * look like the following, 49535fd0808STejun Heo * 49635fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 49735fd0808STejun Heo * 49835fd0808STejun Heo * The upper 32bit indexes the following regions. 49935fd0808STejun Heo * 50035fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 50135fd0808STejun Heo * 50235fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 50335fd0808STejun Heo * in lockstep and returns each intersection. 50435fd0808STejun Heo */ 50535fd0808STejun Heo void __init_memblock __next_free_mem_range(u64 *idx, int nid, 50635fd0808STejun Heo phys_addr_t *out_start, 50735fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 50835fd0808STejun Heo { 50935fd0808STejun Heo struct memblock_type *mem = &memblock.memory; 51035fd0808STejun Heo struct memblock_type *rsv = &memblock.reserved; 51135fd0808STejun Heo int mi = *idx & 0xffffffff; 51235fd0808STejun Heo int ri = *idx >> 32; 51335fd0808STejun Heo 51435fd0808STejun Heo for ( ; mi < mem->cnt; mi++) { 51535fd0808STejun Heo struct memblock_region *m = &mem->regions[mi]; 51635fd0808STejun Heo phys_addr_t m_start = m->base; 51735fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 51835fd0808STejun Heo 51935fd0808STejun Heo /* only memory regions are associated with nodes, check it */ 52035fd0808STejun Heo if (nid != MAX_NUMNODES && nid != memblock_get_region_node(m)) 52135fd0808STejun Heo continue; 52235fd0808STejun Heo 52335fd0808STejun Heo /* scan areas before each reservation for intersection */ 52435fd0808STejun Heo for ( ; ri < rsv->cnt + 1; ri++) { 52535fd0808STejun Heo struct memblock_region *r = &rsv->regions[ri]; 52635fd0808STejun Heo phys_addr_t r_start = ri ? r[-1].base + r[-1].size : 0; 52735fd0808STejun Heo phys_addr_t r_end = ri < rsv->cnt ? r->base : ULLONG_MAX; 52835fd0808STejun Heo 52935fd0808STejun Heo /* if ri advanced past mi, break out to advance mi */ 53035fd0808STejun Heo if (r_start >= m_end) 53135fd0808STejun Heo break; 53235fd0808STejun Heo /* if the two regions intersect, we're done */ 53335fd0808STejun Heo if (m_start < r_end) { 53435fd0808STejun Heo if (out_start) 53535fd0808STejun Heo *out_start = max(m_start, r_start); 53635fd0808STejun Heo if (out_end) 53735fd0808STejun Heo *out_end = min(m_end, r_end); 53835fd0808STejun Heo if (out_nid) 53935fd0808STejun Heo *out_nid = memblock_get_region_node(m); 54035fd0808STejun Heo /* 54135fd0808STejun Heo * The region which ends first is advanced 54235fd0808STejun Heo * for the next iteration. 54335fd0808STejun Heo */ 54435fd0808STejun Heo if (m_end <= r_end) 54535fd0808STejun Heo mi++; 54635fd0808STejun Heo else 54735fd0808STejun Heo ri++; 54835fd0808STejun Heo *idx = (u32)mi | (u64)ri << 32; 54935fd0808STejun Heo return; 55035fd0808STejun Heo } 55135fd0808STejun Heo } 55235fd0808STejun Heo } 55335fd0808STejun Heo 55435fd0808STejun Heo /* signal end of iteration */ 55535fd0808STejun Heo *idx = ULLONG_MAX; 55635fd0808STejun Heo } 55735fd0808STejun Heo 5587c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 5597c0caeb8STejun Heo /* 5607c0caeb8STejun Heo * Common iterator interface used to define for_each_mem_range(). 5617c0caeb8STejun Heo */ 5627c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 5637c0caeb8STejun Heo unsigned long *out_start_pfn, 5647c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 5657c0caeb8STejun Heo { 5667c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 5677c0caeb8STejun Heo struct memblock_region *r; 5687c0caeb8STejun Heo 5697c0caeb8STejun Heo while (++*idx < type->cnt) { 5707c0caeb8STejun Heo r = &type->regions[*idx]; 5717c0caeb8STejun Heo 5727c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 5737c0caeb8STejun Heo continue; 5747c0caeb8STejun Heo if (nid == MAX_NUMNODES || nid == r->nid) 5757c0caeb8STejun Heo break; 5767c0caeb8STejun Heo } 5777c0caeb8STejun Heo if (*idx >= type->cnt) { 5787c0caeb8STejun Heo *idx = -1; 5797c0caeb8STejun Heo return; 5807c0caeb8STejun Heo } 5817c0caeb8STejun Heo 5827c0caeb8STejun Heo if (out_start_pfn) 5837c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 5847c0caeb8STejun Heo if (out_end_pfn) 5857c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 5867c0caeb8STejun Heo if (out_nid) 5877c0caeb8STejun Heo *out_nid = r->nid; 5887c0caeb8STejun Heo } 5897c0caeb8STejun Heo 5907c0caeb8STejun Heo /** 5917c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 5927c0caeb8STejun Heo * @base: base of area to set node ID for 5937c0caeb8STejun Heo * @size: size of area to set node ID for 5947c0caeb8STejun Heo * @nid: node ID to set 5957c0caeb8STejun Heo * 5967c0caeb8STejun Heo * Set the nid of memblock memory regions in [@base,@base+@size) to @nid. 5977c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 5987c0caeb8STejun Heo * 5997c0caeb8STejun Heo * RETURNS: 6007c0caeb8STejun Heo * 0 on success, -errno on failure. 6017c0caeb8STejun Heo */ 6027c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 6037c0caeb8STejun Heo int nid) 6047c0caeb8STejun Heo { 6057c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 6067c0caeb8STejun Heo phys_addr_t end = base + size; 6077c0caeb8STejun Heo int i; 6087c0caeb8STejun Heo 6097c0caeb8STejun Heo /* we'll create at most two more regions */ 6107c0caeb8STejun Heo while (type->cnt + 2 > type->max) 6117c0caeb8STejun Heo if (memblock_double_array(type) < 0) 6127c0caeb8STejun Heo return -ENOMEM; 6137c0caeb8STejun Heo 6147c0caeb8STejun Heo for (i = 0; i < type->cnt; i++) { 6157c0caeb8STejun Heo struct memblock_region *rgn = &type->regions[i]; 6167c0caeb8STejun Heo phys_addr_t rbase = rgn->base; 6177c0caeb8STejun Heo phys_addr_t rend = rbase + rgn->size; 6187c0caeb8STejun Heo 6197c0caeb8STejun Heo if (rbase >= end) 6207c0caeb8STejun Heo break; 6217c0caeb8STejun Heo if (rend <= base) 6227c0caeb8STejun Heo continue; 6237c0caeb8STejun Heo 6247c0caeb8STejun Heo if (rbase < base) { 6257c0caeb8STejun Heo /* 6267c0caeb8STejun Heo * @rgn intersects from below. Split and continue 6277c0caeb8STejun Heo * to process the next region - the new top half. 6287c0caeb8STejun Heo */ 6297c0caeb8STejun Heo rgn->base = base; 6307c0caeb8STejun Heo rgn->size = rend - rgn->base; 6317c0caeb8STejun Heo memblock_insert_region(type, i, rbase, base - rbase, 6327c0caeb8STejun Heo rgn->nid); 6337c0caeb8STejun Heo } else if (rend > end) { 6347c0caeb8STejun Heo /* 6357c0caeb8STejun Heo * @rgn intersects from above. Split and redo the 6367c0caeb8STejun Heo * current region - the new bottom half. 6377c0caeb8STejun Heo */ 6387c0caeb8STejun Heo rgn->base = end; 6397c0caeb8STejun Heo rgn->size = rend - rgn->base; 6407c0caeb8STejun Heo memblock_insert_region(type, i--, rbase, end - rbase, 6417c0caeb8STejun Heo rgn->nid); 6427c0caeb8STejun Heo } else { 6437c0caeb8STejun Heo /* @rgn is fully contained, set ->nid */ 6447c0caeb8STejun Heo rgn->nid = nid; 6457c0caeb8STejun Heo } 6467c0caeb8STejun Heo } 6477c0caeb8STejun Heo 6487c0caeb8STejun Heo memblock_merge_regions(type); 6497c0caeb8STejun Heo return 0; 6507c0caeb8STejun Heo } 6517c0caeb8STejun Heo #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ 6527c0caeb8STejun Heo 6536ed311b2SBenjamin Herrenschmidt phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 65495f72d1eSYinghai Lu { 6556ed311b2SBenjamin Herrenschmidt phys_addr_t found; 65695f72d1eSYinghai Lu 6576ed311b2SBenjamin Herrenschmidt /* We align the size to limit fragmentation. Without this, a lot of 6586ed311b2SBenjamin Herrenschmidt * small allocs quickly eat up the whole reserve array on sparc 6596ed311b2SBenjamin Herrenschmidt */ 660348968ebSTejun Heo size = round_up(size, align); 6616ed311b2SBenjamin Herrenschmidt 662fc769a8eSTejun Heo found = memblock_find_in_range(0, max_addr, size, align); 6639c8c27e2STejun Heo if (found && !memblock_reserve(found, size)) 6646ed311b2SBenjamin Herrenschmidt return found; 6656ed311b2SBenjamin Herrenschmidt 6666ed311b2SBenjamin Herrenschmidt return 0; 66795f72d1eSYinghai Lu } 66895f72d1eSYinghai Lu 6696ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 67095f72d1eSYinghai Lu { 6716ed311b2SBenjamin Herrenschmidt phys_addr_t alloc; 6726ed311b2SBenjamin Herrenschmidt 6736ed311b2SBenjamin Herrenschmidt alloc = __memblock_alloc_base(size, align, max_addr); 6746ed311b2SBenjamin Herrenschmidt 6756ed311b2SBenjamin Herrenschmidt if (alloc == 0) 6766ed311b2SBenjamin Herrenschmidt panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n", 6776ed311b2SBenjamin Herrenschmidt (unsigned long long) size, (unsigned long long) max_addr); 6786ed311b2SBenjamin Herrenschmidt 6796ed311b2SBenjamin Herrenschmidt return alloc; 68095f72d1eSYinghai Lu } 68195f72d1eSYinghai Lu 6826ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) 68395f72d1eSYinghai Lu { 6846ed311b2SBenjamin Herrenschmidt return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 68595f72d1eSYinghai Lu } 68695f72d1eSYinghai Lu 68795f72d1eSYinghai Lu 6886ed311b2SBenjamin Herrenschmidt /* 68934e18455STejun Heo * Additional node-local top-down allocators. 690c196f76fSBenjamin Herrenschmidt * 691c196f76fSBenjamin Herrenschmidt * WARNING: Only available after early_node_map[] has been populated, 692c196f76fSBenjamin Herrenschmidt * on some architectures, that is after all the calls to add_active_range() 693c196f76fSBenjamin Herrenschmidt * have been done to populate it. 6946ed311b2SBenjamin Herrenschmidt */ 69595f72d1eSYinghai Lu 69634e18455STejun Heo static phys_addr_t __init memblock_nid_range_rev(phys_addr_t start, 69734e18455STejun Heo phys_addr_t end, int *nid) 698c3f72b57SBenjamin Herrenschmidt { 699c196f76fSBenjamin Herrenschmidt #ifdef CONFIG_ARCH_POPULATES_NODE_MAP 700c196f76fSBenjamin Herrenschmidt unsigned long start_pfn, end_pfn; 701c196f76fSBenjamin Herrenschmidt int i; 702c196f76fSBenjamin Herrenschmidt 703b2fea988STejun Heo for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, nid) 70434e18455STejun Heo if (end > PFN_PHYS(start_pfn) && end <= PFN_PHYS(end_pfn)) 70534e18455STejun Heo return max(start, PFN_PHYS(start_pfn)); 706c196f76fSBenjamin Herrenschmidt #endif 707c3f72b57SBenjamin Herrenschmidt *nid = 0; 70834e18455STejun Heo return start; 709c3f72b57SBenjamin Herrenschmidt } 710c3f72b57SBenjamin Herrenschmidt 711e6498040STejun Heo phys_addr_t __init memblock_find_in_range_node(phys_addr_t start, 712e6498040STejun Heo phys_addr_t end, 7132898cc4cSBenjamin Herrenschmidt phys_addr_t size, 7142898cc4cSBenjamin Herrenschmidt phys_addr_t align, int nid) 71595f72d1eSYinghai Lu { 716e3239ff9SBenjamin Herrenschmidt struct memblock_type *mem = &memblock.memory; 71795f72d1eSYinghai Lu int i; 71895f72d1eSYinghai Lu 71995f72d1eSYinghai Lu BUG_ON(0 == size); 72095f72d1eSYinghai Lu 721e6498040STejun Heo /* Pump up max_addr */ 722e6498040STejun Heo if (end == MEMBLOCK_ALLOC_ACCESSIBLE) 723e6498040STejun Heo end = memblock.current_limit; 724e6498040STejun Heo 725e6498040STejun Heo for (i = mem->cnt - 1; i >= 0; i--) { 726e6498040STejun Heo struct memblock_region *r = &mem->regions[i]; 727e6498040STejun Heo phys_addr_t base = max(start, r->base); 728e6498040STejun Heo phys_addr_t top = min(end, r->base + r->size); 729e6498040STejun Heo 730e6498040STejun Heo while (base < top) { 731e6498040STejun Heo phys_addr_t tbase, ret; 732e6498040STejun Heo int tnid; 733e6498040STejun Heo 734e6498040STejun Heo tbase = memblock_nid_range_rev(base, top, &tnid); 735e6498040STejun Heo if (nid == MAX_NUMNODES || tnid == nid) { 736e6498040STejun Heo ret = memblock_find_region(tbase, top, size, align); 737e6498040STejun Heo if (ret) 738e6498040STejun Heo return ret; 739e6498040STejun Heo } 740e6498040STejun Heo top = tbase; 741e6498040STejun Heo } 742e6498040STejun Heo } 743e6498040STejun Heo 744e6498040STejun Heo return 0; 745e6498040STejun Heo } 746e6498040STejun Heo 747e6498040STejun Heo phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) 748e6498040STejun Heo { 749e6498040STejun Heo phys_addr_t found; 750e6498040STejun Heo 751e6498040STejun Heo /* 752e6498040STejun Heo * We align the size to limit fragmentation. Without this, a lot of 7537f219c73SBenjamin Herrenschmidt * small allocs quickly eat up the whole reserve array on sparc 7547f219c73SBenjamin Herrenschmidt */ 755348968ebSTejun Heo size = round_up(size, align); 7567f219c73SBenjamin Herrenschmidt 757e6498040STejun Heo found = memblock_find_in_range_node(0, MEMBLOCK_ALLOC_ACCESSIBLE, 75895f72d1eSYinghai Lu size, align, nid); 7599c8c27e2STejun Heo if (found && !memblock_reserve(found, size)) 760e6498040STejun Heo return found; 76195f72d1eSYinghai Lu 7629d1e2492SBenjamin Herrenschmidt return 0; 7639d1e2492SBenjamin Herrenschmidt } 7649d1e2492SBenjamin Herrenschmidt 7659d1e2492SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 7669d1e2492SBenjamin Herrenschmidt { 7679d1e2492SBenjamin Herrenschmidt phys_addr_t res = memblock_alloc_nid(size, align, nid); 7689d1e2492SBenjamin Herrenschmidt 7699d1e2492SBenjamin Herrenschmidt if (res) 7709d1e2492SBenjamin Herrenschmidt return res; 77115fb0972STejun Heo return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 77295f72d1eSYinghai Lu } 77395f72d1eSYinghai Lu 7749d1e2492SBenjamin Herrenschmidt 7759d1e2492SBenjamin Herrenschmidt /* 7769d1e2492SBenjamin Herrenschmidt * Remaining API functions 7779d1e2492SBenjamin Herrenschmidt */ 7789d1e2492SBenjamin Herrenschmidt 77995f72d1eSYinghai Lu /* You must call memblock_analyze() before this. */ 7802898cc4cSBenjamin Herrenschmidt phys_addr_t __init memblock_phys_mem_size(void) 78195f72d1eSYinghai Lu { 7824734b594SBenjamin Herrenschmidt return memblock.memory_size; 78395f72d1eSYinghai Lu } 78495f72d1eSYinghai Lu 7850a93ebefSSam Ravnborg /* lowest address */ 7860a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 7870a93ebefSSam Ravnborg { 7880a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 7890a93ebefSSam Ravnborg } 7900a93ebefSSam Ravnborg 79110d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 79295f72d1eSYinghai Lu { 79395f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 79495f72d1eSYinghai Lu 795e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 79695f72d1eSYinghai Lu } 79795f72d1eSYinghai Lu 79895f72d1eSYinghai Lu /* You must call memblock_analyze() after this. */ 7992898cc4cSBenjamin Herrenschmidt void __init memblock_enforce_memory_limit(phys_addr_t memory_limit) 80095f72d1eSYinghai Lu { 80195f72d1eSYinghai Lu unsigned long i; 8022898cc4cSBenjamin Herrenschmidt phys_addr_t limit; 803e3239ff9SBenjamin Herrenschmidt struct memblock_region *p; 80495f72d1eSYinghai Lu 80595f72d1eSYinghai Lu if (!memory_limit) 80695f72d1eSYinghai Lu return; 80795f72d1eSYinghai Lu 80895f72d1eSYinghai Lu /* Truncate the memblock regions to satisfy the memory limit. */ 80995f72d1eSYinghai Lu limit = memory_limit; 81095f72d1eSYinghai Lu for (i = 0; i < memblock.memory.cnt; i++) { 811e3239ff9SBenjamin Herrenschmidt if (limit > memblock.memory.regions[i].size) { 812e3239ff9SBenjamin Herrenschmidt limit -= memblock.memory.regions[i].size; 81395f72d1eSYinghai Lu continue; 81495f72d1eSYinghai Lu } 81595f72d1eSYinghai Lu 816e3239ff9SBenjamin Herrenschmidt memblock.memory.regions[i].size = limit; 81795f72d1eSYinghai Lu memblock.memory.cnt = i + 1; 81895f72d1eSYinghai Lu break; 81995f72d1eSYinghai Lu } 82095f72d1eSYinghai Lu 82195f72d1eSYinghai Lu memory_limit = memblock_end_of_DRAM(); 82295f72d1eSYinghai Lu 82395f72d1eSYinghai Lu /* And truncate any reserves above the limit also. */ 82495f72d1eSYinghai Lu for (i = 0; i < memblock.reserved.cnt; i++) { 825e3239ff9SBenjamin Herrenschmidt p = &memblock.reserved.regions[i]; 82695f72d1eSYinghai Lu 82795f72d1eSYinghai Lu if (p->base > memory_limit) 82895f72d1eSYinghai Lu p->size = 0; 82995f72d1eSYinghai Lu else if ((p->base + p->size) > memory_limit) 83095f72d1eSYinghai Lu p->size = memory_limit - p->base; 83195f72d1eSYinghai Lu 83295f72d1eSYinghai Lu if (p->size == 0) { 83395f72d1eSYinghai Lu memblock_remove_region(&memblock.reserved, i); 83495f72d1eSYinghai Lu i--; 83595f72d1eSYinghai Lu } 83695f72d1eSYinghai Lu } 83795f72d1eSYinghai Lu } 83895f72d1eSYinghai Lu 839cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 84072d4b0b4SBenjamin Herrenschmidt { 84172d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 84272d4b0b4SBenjamin Herrenschmidt 84372d4b0b4SBenjamin Herrenschmidt do { 84472d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 84572d4b0b4SBenjamin Herrenschmidt 84672d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 84772d4b0b4SBenjamin Herrenschmidt right = mid; 84872d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 84972d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 85072d4b0b4SBenjamin Herrenschmidt left = mid + 1; 85172d4b0b4SBenjamin Herrenschmidt else 85272d4b0b4SBenjamin Herrenschmidt return mid; 85372d4b0b4SBenjamin Herrenschmidt } while (left < right); 85472d4b0b4SBenjamin Herrenschmidt return -1; 85572d4b0b4SBenjamin Herrenschmidt } 85672d4b0b4SBenjamin Herrenschmidt 8572898cc4cSBenjamin Herrenschmidt int __init memblock_is_reserved(phys_addr_t addr) 85895f72d1eSYinghai Lu { 85972d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 86095f72d1eSYinghai Lu } 86172d4b0b4SBenjamin Herrenschmidt 8623661ca66SYinghai Lu int __init_memblock memblock_is_memory(phys_addr_t addr) 86372d4b0b4SBenjamin Herrenschmidt { 86472d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 86572d4b0b4SBenjamin Herrenschmidt } 86672d4b0b4SBenjamin Herrenschmidt 8673661ca66SYinghai Lu int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 86872d4b0b4SBenjamin Herrenschmidt { 869abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 87072d4b0b4SBenjamin Herrenschmidt 87172d4b0b4SBenjamin Herrenschmidt if (idx == -1) 87295f72d1eSYinghai Lu return 0; 873abb65272STomi Valkeinen return memblock.memory.regions[idx].base <= base && 874abb65272STomi Valkeinen (memblock.memory.regions[idx].base + 875abb65272STomi Valkeinen memblock.memory.regions[idx].size) >= (base + size); 87695f72d1eSYinghai Lu } 87795f72d1eSYinghai Lu 87810d06439SYinghai Lu int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 87995f72d1eSYinghai Lu { 880f1c2c19cSBenjamin Herrenschmidt return memblock_overlaps_region(&memblock.reserved, base, size) >= 0; 88195f72d1eSYinghai Lu } 88295f72d1eSYinghai Lu 883e63075a3SBenjamin Herrenschmidt 8843661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 885e63075a3SBenjamin Herrenschmidt { 886e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 887e63075a3SBenjamin Herrenschmidt } 888e63075a3SBenjamin Herrenschmidt 8897c0caeb8STejun Heo static void __init_memblock memblock_dump(struct memblock_type *type, char *name) 8906ed311b2SBenjamin Herrenschmidt { 8916ed311b2SBenjamin Herrenschmidt unsigned long long base, size; 8926ed311b2SBenjamin Herrenschmidt int i; 8936ed311b2SBenjamin Herrenschmidt 8947c0caeb8STejun Heo pr_info(" %s.cnt = 0x%lx\n", name, type->cnt); 8956ed311b2SBenjamin Herrenschmidt 8967c0caeb8STejun Heo for (i = 0; i < type->cnt; i++) { 8977c0caeb8STejun Heo struct memblock_region *rgn = &type->regions[i]; 8987c0caeb8STejun Heo char nid_buf[32] = ""; 8996ed311b2SBenjamin Herrenschmidt 9007c0caeb8STejun Heo base = rgn->base; 9017c0caeb8STejun Heo size = rgn->size; 9027c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 9037c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 9047c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 9057c0caeb8STejun Heo memblock_get_region_node(rgn)); 9067c0caeb8STejun Heo #endif 9077c0caeb8STejun Heo pr_info(" %s[%#x]\t[%#016llx-%#016llx], %#llx bytes%s\n", 9087c0caeb8STejun Heo name, i, base, base + size - 1, size, nid_buf); 9096ed311b2SBenjamin Herrenschmidt } 9106ed311b2SBenjamin Herrenschmidt } 9116ed311b2SBenjamin Herrenschmidt 9124ff7b82fSTejun Heo void __init_memblock __memblock_dump_all(void) 9136ed311b2SBenjamin Herrenschmidt { 9146ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 9156ed311b2SBenjamin Herrenschmidt pr_info(" memory size = 0x%llx\n", (unsigned long long)memblock.memory_size); 9166ed311b2SBenjamin Herrenschmidt 9176ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.memory, "memory"); 9186ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.reserved, "reserved"); 9196ed311b2SBenjamin Herrenschmidt } 9206ed311b2SBenjamin Herrenschmidt 9216ed311b2SBenjamin Herrenschmidt void __init memblock_analyze(void) 9226ed311b2SBenjamin Herrenschmidt { 9236ed311b2SBenjamin Herrenschmidt int i; 9246ed311b2SBenjamin Herrenschmidt 9256ed311b2SBenjamin Herrenschmidt memblock.memory_size = 0; 9266ed311b2SBenjamin Herrenschmidt 9276ed311b2SBenjamin Herrenschmidt for (i = 0; i < memblock.memory.cnt; i++) 9286ed311b2SBenjamin Herrenschmidt memblock.memory_size += memblock.memory.regions[i].size; 929142b45a7SBenjamin Herrenschmidt 930142b45a7SBenjamin Herrenschmidt /* We allow resizing from there */ 931142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 9326ed311b2SBenjamin Herrenschmidt } 9336ed311b2SBenjamin Herrenschmidt 9346ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 9356ed311b2SBenjamin Herrenschmidt { 9366ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 9376ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 9386ed311b2SBenjamin Herrenschmidt return 0; 9396ed311b2SBenjamin Herrenschmidt } 9406ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 9416ed311b2SBenjamin Herrenschmidt 942c378ddd5STejun Heo #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) 9436d03b885SBenjamin Herrenschmidt 9446d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 9456d03b885SBenjamin Herrenschmidt { 9466d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 9476d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 9486d03b885SBenjamin Herrenschmidt int i; 9496d03b885SBenjamin Herrenschmidt 9506d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 9516d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 9526d03b885SBenjamin Herrenschmidt seq_printf(m, "%4d: ", i); 9536d03b885SBenjamin Herrenschmidt if (sizeof(phys_addr_t) == 4) 9546d03b885SBenjamin Herrenschmidt seq_printf(m, "0x%08lx..0x%08lx\n", 9556d03b885SBenjamin Herrenschmidt (unsigned long)reg->base, 9566d03b885SBenjamin Herrenschmidt (unsigned long)(reg->base + reg->size - 1)); 9576d03b885SBenjamin Herrenschmidt else 9586d03b885SBenjamin Herrenschmidt seq_printf(m, "0x%016llx..0x%016llx\n", 9596d03b885SBenjamin Herrenschmidt (unsigned long long)reg->base, 9606d03b885SBenjamin Herrenschmidt (unsigned long long)(reg->base + reg->size - 1)); 9616d03b885SBenjamin Herrenschmidt 9626d03b885SBenjamin Herrenschmidt } 9636d03b885SBenjamin Herrenschmidt return 0; 9646d03b885SBenjamin Herrenschmidt } 9656d03b885SBenjamin Herrenschmidt 9666d03b885SBenjamin Herrenschmidt static int memblock_debug_open(struct inode *inode, struct file *file) 9676d03b885SBenjamin Herrenschmidt { 9686d03b885SBenjamin Herrenschmidt return single_open(file, memblock_debug_show, inode->i_private); 9696d03b885SBenjamin Herrenschmidt } 9706d03b885SBenjamin Herrenschmidt 9716d03b885SBenjamin Herrenschmidt static const struct file_operations memblock_debug_fops = { 9726d03b885SBenjamin Herrenschmidt .open = memblock_debug_open, 9736d03b885SBenjamin Herrenschmidt .read = seq_read, 9746d03b885SBenjamin Herrenschmidt .llseek = seq_lseek, 9756d03b885SBenjamin Herrenschmidt .release = single_release, 9766d03b885SBenjamin Herrenschmidt }; 9776d03b885SBenjamin Herrenschmidt 9786d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 9796d03b885SBenjamin Herrenschmidt { 9806d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 9816d03b885SBenjamin Herrenschmidt if (!root) 9826d03b885SBenjamin Herrenschmidt return -ENXIO; 9836d03b885SBenjamin Herrenschmidt debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); 9846d03b885SBenjamin Herrenschmidt debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); 9856d03b885SBenjamin Herrenschmidt 9866d03b885SBenjamin Herrenschmidt return 0; 9876d03b885SBenjamin Herrenschmidt } 9886d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 9896d03b885SBenjamin Herrenschmidt 9906d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 991