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> 20514c6032SRandy Dunlap #include <linux/kmemleak.h> 216d03b885SBenjamin Herrenschmidt #include <linux/seq_file.h> 2295f72d1eSYinghai Lu #include <linux/memblock.h> 2395f72d1eSYinghai Lu 24c4c5ad6bSChristoph Hellwig #include <asm/sections.h> 2526f09e9bSSantosh Shilimkar #include <linux/io.h> 2626f09e9bSSantosh Shilimkar 2726f09e9bSSantosh Shilimkar #include "internal.h" 2879442ed1STang Chen 298a5b403dSArd Biesheuvel #define INIT_MEMBLOCK_REGIONS 128 308a5b403dSArd Biesheuvel #define INIT_PHYSMEM_REGIONS 4 318a5b403dSArd Biesheuvel 328a5b403dSArd Biesheuvel #ifndef INIT_MEMBLOCK_RESERVED_REGIONS 338a5b403dSArd Biesheuvel # define INIT_MEMBLOCK_RESERVED_REGIONS INIT_MEMBLOCK_REGIONS 348a5b403dSArd Biesheuvel #endif 358a5b403dSArd Biesheuvel 363e039c5cSMike Rapoport /** 373e039c5cSMike Rapoport * DOC: memblock overview 383e039c5cSMike Rapoport * 393e039c5cSMike Rapoport * Memblock is a method of managing memory regions during the early 403e039c5cSMike Rapoport * boot period when the usual kernel memory allocators are not up and 413e039c5cSMike Rapoport * running. 423e039c5cSMike Rapoport * 433e039c5cSMike Rapoport * Memblock views the system memory as collections of contiguous 443e039c5cSMike Rapoport * regions. There are several types of these collections: 453e039c5cSMike Rapoport * 463e039c5cSMike Rapoport * * ``memory`` - describes the physical memory available to the 473e039c5cSMike Rapoport * kernel; this may differ from the actual physical memory installed 483e039c5cSMike Rapoport * in the system, for instance when the memory is restricted with 493e039c5cSMike Rapoport * ``mem=`` command line parameter 503e039c5cSMike Rapoport * * ``reserved`` - describes the regions that were allocated 513e039c5cSMike Rapoport * * ``physmap`` - describes the actual physical memory regardless of 523e039c5cSMike Rapoport * the possible restrictions; the ``physmap`` type is only available 533e039c5cSMike Rapoport * on some architectures. 543e039c5cSMike Rapoport * 553e039c5cSMike Rapoport * Each region is represented by :c:type:`struct memblock_region` that 563e039c5cSMike Rapoport * defines the region extents, its attributes and NUMA node id on NUMA 573e039c5cSMike Rapoport * systems. Every memory type is described by the :c:type:`struct 583e039c5cSMike Rapoport * memblock_type` which contains an array of memory regions along with 593e039c5cSMike Rapoport * the allocator metadata. The memory types are nicely wrapped with 603e039c5cSMike Rapoport * :c:type:`struct memblock`. This structure is statically initialzed 613e039c5cSMike Rapoport * at build time. The region arrays for the "memory" and "reserved" 623e039c5cSMike Rapoport * types are initially sized to %INIT_MEMBLOCK_REGIONS and for the 633e039c5cSMike Rapoport * "physmap" type to %INIT_PHYSMEM_REGIONS. 643e039c5cSMike Rapoport * The :c:func:`memblock_allow_resize` enables automatic resizing of 653e039c5cSMike Rapoport * the region arrays during addition of new regions. This feature 663e039c5cSMike Rapoport * should be used with care so that memory allocated for the region 673e039c5cSMike Rapoport * array will not overlap with areas that should be reserved, for 683e039c5cSMike Rapoport * example initrd. 693e039c5cSMike Rapoport * 703e039c5cSMike Rapoport * The early architecture setup should tell memblock what the physical 713e039c5cSMike Rapoport * memory layout is by using :c:func:`memblock_add` or 723e039c5cSMike Rapoport * :c:func:`memblock_add_node` functions. The first function does not 733e039c5cSMike Rapoport * assign the region to a NUMA node and it is appropriate for UMA 743e039c5cSMike Rapoport * systems. Yet, it is possible to use it on NUMA systems as well and 753e039c5cSMike Rapoport * assign the region to a NUMA node later in the setup process using 763e039c5cSMike Rapoport * :c:func:`memblock_set_node`. The :c:func:`memblock_add_node` 773e039c5cSMike Rapoport * performs such an assignment directly. 783e039c5cSMike Rapoport * 793e039c5cSMike Rapoport * Once memblock is setup the memory can be allocated using either 803e039c5cSMike Rapoport * memblock or bootmem APIs. 813e039c5cSMike Rapoport * 823e039c5cSMike Rapoport * As the system boot progresses, the architecture specific 833e039c5cSMike Rapoport * :c:func:`mem_init` function frees all the memory to the buddy page 843e039c5cSMike Rapoport * allocator. 853e039c5cSMike Rapoport * 863e039c5cSMike Rapoport * If an architecure enables %CONFIG_ARCH_DISCARD_MEMBLOCK, the 873e039c5cSMike Rapoport * memblock data structures will be discarded after the system 883e039c5cSMike Rapoport * initialization compltes. 893e039c5cSMike Rapoport */ 903e039c5cSMike Rapoport 91bda49a81SMike Rapoport #ifndef CONFIG_NEED_MULTIPLE_NODES 92bda49a81SMike Rapoport struct pglist_data __refdata contig_page_data; 93bda49a81SMike Rapoport EXPORT_SYMBOL(contig_page_data); 94bda49a81SMike Rapoport #endif 95bda49a81SMike Rapoport 96bda49a81SMike Rapoport unsigned long max_low_pfn; 97bda49a81SMike Rapoport unsigned long min_low_pfn; 98bda49a81SMike Rapoport unsigned long max_pfn; 99bda49a81SMike Rapoport unsigned long long max_possible_pfn; 100bda49a81SMike Rapoport 101fe091c20STejun Heo static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; 1028a5b403dSArd Biesheuvel static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_RESERVED_REGIONS] __initdata_memblock; 10370210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 10470210ed9SPhilipp Hachtmann static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS] __initdata_memblock; 10570210ed9SPhilipp Hachtmann #endif 106fe091c20STejun Heo 107fe091c20STejun Heo struct memblock memblock __initdata_memblock = { 108fe091c20STejun Heo .memory.regions = memblock_memory_init_regions, 109fe091c20STejun Heo .memory.cnt = 1, /* empty dummy entry */ 110fe091c20STejun Heo .memory.max = INIT_MEMBLOCK_REGIONS, 1110262d9c8SHeiko Carstens .memory.name = "memory", 112fe091c20STejun Heo 113fe091c20STejun Heo .reserved.regions = memblock_reserved_init_regions, 114fe091c20STejun Heo .reserved.cnt = 1, /* empty dummy entry */ 1158a5b403dSArd Biesheuvel .reserved.max = INIT_MEMBLOCK_RESERVED_REGIONS, 1160262d9c8SHeiko Carstens .reserved.name = "reserved", 117fe091c20STejun Heo 11870210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 11970210ed9SPhilipp Hachtmann .physmem.regions = memblock_physmem_init_regions, 12070210ed9SPhilipp Hachtmann .physmem.cnt = 1, /* empty dummy entry */ 12170210ed9SPhilipp Hachtmann .physmem.max = INIT_PHYSMEM_REGIONS, 1220262d9c8SHeiko Carstens .physmem.name = "physmem", 12370210ed9SPhilipp Hachtmann #endif 12470210ed9SPhilipp Hachtmann 12579442ed1STang Chen .bottom_up = false, 126fe091c20STejun Heo .current_limit = MEMBLOCK_ALLOC_ANYWHERE, 127fe091c20STejun Heo }; 12895f72d1eSYinghai Lu 12910d06439SYinghai Lu int memblock_debug __initdata_memblock; 130a3f5bafcSTony Luck static bool system_has_some_mirror __initdata_memblock = false; 1311aadc056STejun Heo static int memblock_can_resize __initdata_memblock; 132181eb394SGavin Shan static int memblock_memory_in_slab __initdata_memblock = 0; 133181eb394SGavin Shan static int memblock_reserved_in_slab __initdata_memblock = 0; 13495f72d1eSYinghai Lu 135c366ea89SMike Rapoport static enum memblock_flags __init_memblock choose_memblock_flags(void) 136a3f5bafcSTony Luck { 137a3f5bafcSTony Luck return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; 138a3f5bafcSTony Luck } 139a3f5bafcSTony Luck 140eb18f1b5STejun Heo /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ 141eb18f1b5STejun Heo static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) 142eb18f1b5STejun Heo { 1431c4bc43dSStefan Agner return *size = min(*size, PHYS_ADDR_MAX - base); 144eb18f1b5STejun Heo } 145eb18f1b5STejun Heo 1466ed311b2SBenjamin Herrenschmidt /* 1476ed311b2SBenjamin Herrenschmidt * Address comparison utilities 1486ed311b2SBenjamin Herrenschmidt */ 14910d06439SYinghai Lu static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, 1502898cc4cSBenjamin Herrenschmidt phys_addr_t base2, phys_addr_t size2) 15195f72d1eSYinghai Lu { 15295f72d1eSYinghai Lu return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); 15395f72d1eSYinghai Lu } 15495f72d1eSYinghai Lu 15595cf82ecSTang Chen bool __init_memblock memblock_overlaps_region(struct memblock_type *type, 1562d7d3eb2SH Hartley Sweeten phys_addr_t base, phys_addr_t size) 1576ed311b2SBenjamin Herrenschmidt { 1586ed311b2SBenjamin Herrenschmidt unsigned long i; 1596ed311b2SBenjamin Herrenschmidt 160f14516fbSAlexander Kuleshov for (i = 0; i < type->cnt; i++) 161f14516fbSAlexander Kuleshov if (memblock_addrs_overlap(base, size, type->regions[i].base, 162f14516fbSAlexander Kuleshov type->regions[i].size)) 1636ed311b2SBenjamin Herrenschmidt break; 164c5c5c9d1STang Chen return i < type->cnt; 1656ed311b2SBenjamin Herrenschmidt } 1666ed311b2SBenjamin Herrenschmidt 16747cec443SMike Rapoport /** 16879442ed1STang Chen * __memblock_find_range_bottom_up - find free area utility in bottom-up 16979442ed1STang Chen * @start: start of candidate range 17047cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 17147cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 17279442ed1STang Chen * @size: size of free area to find 17379442ed1STang Chen * @align: alignment of free area to find 174b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 175fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 17679442ed1STang Chen * 17779442ed1STang Chen * Utility called from memblock_find_in_range_node(), find free area bottom-up. 17879442ed1STang Chen * 17947cec443SMike Rapoport * Return: 18079442ed1STang Chen * Found address on success, 0 on failure. 18179442ed1STang Chen */ 18279442ed1STang Chen static phys_addr_t __init_memblock 18379442ed1STang Chen __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, 184fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 185e1720feeSMike Rapoport enum memblock_flags flags) 18679442ed1STang Chen { 18779442ed1STang Chen phys_addr_t this_start, this_end, cand; 18879442ed1STang Chen u64 i; 18979442ed1STang Chen 190fc6daaf9STony Luck for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { 19179442ed1STang Chen this_start = clamp(this_start, start, end); 19279442ed1STang Chen this_end = clamp(this_end, start, end); 19379442ed1STang Chen 19479442ed1STang Chen cand = round_up(this_start, align); 19579442ed1STang Chen if (cand < this_end && this_end - cand >= size) 19679442ed1STang Chen return cand; 19779442ed1STang Chen } 19879442ed1STang Chen 19979442ed1STang Chen return 0; 20079442ed1STang Chen } 20179442ed1STang Chen 2027bd0b0f0STejun Heo /** 2031402899eSTang Chen * __memblock_find_range_top_down - find free area utility, in top-down 2041402899eSTang Chen * @start: start of candidate range 20547cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 20647cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 2071402899eSTang Chen * @size: size of free area to find 2081402899eSTang Chen * @align: alignment of free area to find 209b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 210fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 2111402899eSTang Chen * 2121402899eSTang Chen * Utility called from memblock_find_in_range_node(), find free area top-down. 2131402899eSTang Chen * 21447cec443SMike Rapoport * Return: 21579442ed1STang Chen * Found address on success, 0 on failure. 2161402899eSTang Chen */ 2171402899eSTang Chen static phys_addr_t __init_memblock 2181402899eSTang Chen __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, 219fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 220e1720feeSMike Rapoport enum memblock_flags flags) 2211402899eSTang Chen { 2221402899eSTang Chen phys_addr_t this_start, this_end, cand; 2231402899eSTang Chen u64 i; 2241402899eSTang Chen 225fc6daaf9STony Luck for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, 226fc6daaf9STony Luck NULL) { 2271402899eSTang Chen this_start = clamp(this_start, start, end); 2281402899eSTang Chen this_end = clamp(this_end, start, end); 2291402899eSTang Chen 2301402899eSTang Chen if (this_end < size) 2311402899eSTang Chen continue; 2321402899eSTang Chen 2331402899eSTang Chen cand = round_down(this_end - size, align); 2341402899eSTang Chen if (cand >= this_start) 2351402899eSTang Chen return cand; 2361402899eSTang Chen } 2371402899eSTang Chen 2381402899eSTang Chen return 0; 2391402899eSTang Chen } 2401402899eSTang Chen 2411402899eSTang Chen /** 2427bd0b0f0STejun Heo * memblock_find_in_range_node - find free area in given range and node 2437bd0b0f0STejun Heo * @size: size of free area to find 2447bd0b0f0STejun Heo * @align: alignment of free area to find 24587029ee9SGrygorii Strashko * @start: start of candidate range 24647cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 24747cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 248b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 249fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 2507bd0b0f0STejun Heo * 2517bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range and node. 2527bd0b0f0STejun Heo * 25379442ed1STang Chen * When allocation direction is bottom-up, the @start should be greater 25479442ed1STang Chen * than the end of the kernel image. Otherwise, it will be trimmed. The 25579442ed1STang Chen * reason is that we want the bottom-up allocation just near the kernel 25679442ed1STang Chen * image so it is highly likely that the allocated memory and the kernel 25779442ed1STang Chen * will reside in the same node. 25879442ed1STang Chen * 25979442ed1STang Chen * If bottom-up allocation failed, will try to allocate memory top-down. 26079442ed1STang Chen * 26147cec443SMike Rapoport * Return: 26279442ed1STang Chen * Found address on success, 0 on failure. 2636ed311b2SBenjamin Herrenschmidt */ 264c366ea89SMike Rapoport static phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, 26587029ee9SGrygorii Strashko phys_addr_t align, phys_addr_t start, 266e1720feeSMike Rapoport phys_addr_t end, int nid, 267e1720feeSMike Rapoport enum memblock_flags flags) 268f7210e6cSTang Chen { 2690cfb8f0cSTang Chen phys_addr_t kernel_end, ret; 27079442ed1STang Chen 271f7210e6cSTang Chen /* pump up @end */ 272fed84c78SQian Cai if (end == MEMBLOCK_ALLOC_ACCESSIBLE || 273fed84c78SQian Cai end == MEMBLOCK_ALLOC_KASAN) 274f7210e6cSTang Chen end = memblock.current_limit; 275f7210e6cSTang Chen 276f7210e6cSTang Chen /* avoid allocating the first page */ 277f7210e6cSTang Chen start = max_t(phys_addr_t, start, PAGE_SIZE); 278f7210e6cSTang Chen end = max(start, end); 27979442ed1STang Chen kernel_end = __pa_symbol(_end); 28079442ed1STang Chen 28179442ed1STang Chen /* 28279442ed1STang Chen * try bottom-up allocation only when bottom-up mode 28379442ed1STang Chen * is set and @end is above the kernel image. 28479442ed1STang Chen */ 28579442ed1STang Chen if (memblock_bottom_up() && end > kernel_end) { 28679442ed1STang Chen phys_addr_t bottom_up_start; 28779442ed1STang Chen 28879442ed1STang Chen /* make sure we will allocate above the kernel */ 28979442ed1STang Chen bottom_up_start = max(start, kernel_end); 29079442ed1STang Chen 29179442ed1STang Chen /* ok, try bottom-up allocation first */ 29279442ed1STang Chen ret = __memblock_find_range_bottom_up(bottom_up_start, end, 293fc6daaf9STony Luck size, align, nid, flags); 29479442ed1STang Chen if (ret) 29579442ed1STang Chen return ret; 29679442ed1STang Chen 29779442ed1STang Chen /* 29879442ed1STang Chen * we always limit bottom-up allocation above the kernel, 29979442ed1STang Chen * but top-down allocation doesn't have the limit, so 30079442ed1STang Chen * retrying top-down allocation may succeed when bottom-up 30179442ed1STang Chen * allocation failed. 30279442ed1STang Chen * 30379442ed1STang Chen * bottom-up allocation is expected to be fail very rarely, 30479442ed1STang Chen * so we use WARN_ONCE() here to see the stack trace if 30579442ed1STang Chen * fail happens. 30679442ed1STang Chen */ 307e3d301caSMichal Hocko WARN_ONCE(IS_ENABLED(CONFIG_MEMORY_HOTREMOVE), 308e3d301caSMichal Hocko "memblock: bottom-up allocation failed, memory hotremove may be affected\n"); 30979442ed1STang Chen } 310f7210e6cSTang Chen 311fc6daaf9STony Luck return __memblock_find_range_top_down(start, end, size, align, nid, 312fc6daaf9STony Luck flags); 313f7210e6cSTang Chen } 3146ed311b2SBenjamin Herrenschmidt 3157bd0b0f0STejun Heo /** 3167bd0b0f0STejun Heo * memblock_find_in_range - find free area in given range 3177bd0b0f0STejun Heo * @start: start of candidate range 31847cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 31947cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 3207bd0b0f0STejun Heo * @size: size of free area to find 3217bd0b0f0STejun Heo * @align: alignment of free area to find 3227bd0b0f0STejun Heo * 3237bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range. 3247bd0b0f0STejun Heo * 32547cec443SMike Rapoport * Return: 32679442ed1STang Chen * Found address on success, 0 on failure. 3277bd0b0f0STejun Heo */ 3287bd0b0f0STejun Heo phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, 3297bd0b0f0STejun Heo phys_addr_t end, phys_addr_t size, 3307bd0b0f0STejun Heo phys_addr_t align) 3317bd0b0f0STejun Heo { 332a3f5bafcSTony Luck phys_addr_t ret; 333e1720feeSMike Rapoport enum memblock_flags flags = choose_memblock_flags(); 334a3f5bafcSTony Luck 335a3f5bafcSTony Luck again: 336a3f5bafcSTony Luck ret = memblock_find_in_range_node(size, align, start, end, 337a3f5bafcSTony Luck NUMA_NO_NODE, flags); 338a3f5bafcSTony Luck 339a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 340a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 341a3f5bafcSTony Luck &size); 342a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 343a3f5bafcSTony Luck goto again; 344a3f5bafcSTony Luck } 345a3f5bafcSTony Luck 346a3f5bafcSTony Luck return ret; 3477bd0b0f0STejun Heo } 3487bd0b0f0STejun Heo 34910d06439SYinghai Lu static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) 35095f72d1eSYinghai Lu { 3511440c4e2STejun Heo type->total_size -= type->regions[r].size; 3527c0caeb8STejun Heo memmove(&type->regions[r], &type->regions[r + 1], 3537c0caeb8STejun Heo (type->cnt - (r + 1)) * sizeof(type->regions[r])); 354e3239ff9SBenjamin Herrenschmidt type->cnt--; 35595f72d1eSYinghai Lu 3568f7a6605SBenjamin Herrenschmidt /* Special case for empty arrays */ 3578f7a6605SBenjamin Herrenschmidt if (type->cnt == 0) { 3581440c4e2STejun Heo WARN_ON(type->total_size != 0); 3598f7a6605SBenjamin Herrenschmidt type->cnt = 1; 3608f7a6605SBenjamin Herrenschmidt type->regions[0].base = 0; 3618f7a6605SBenjamin Herrenschmidt type->regions[0].size = 0; 36266a20757STang Chen type->regions[0].flags = 0; 3637c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 3648f7a6605SBenjamin Herrenschmidt } 36595f72d1eSYinghai Lu } 36695f72d1eSYinghai Lu 367354f17e1SPhilipp Hachtmann #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK 3683010f876SPavel Tatashin /** 36947cec443SMike Rapoport * memblock_discard - discard memory and reserved arrays if they were allocated 3703010f876SPavel Tatashin */ 3713010f876SPavel Tatashin void __init memblock_discard(void) 37229f67386SYinghai Lu { 3733010f876SPavel Tatashin phys_addr_t addr, size; 37429f67386SYinghai Lu 3753010f876SPavel Tatashin if (memblock.reserved.regions != memblock_reserved_init_regions) { 3763010f876SPavel Tatashin addr = __pa(memblock.reserved.regions); 3773010f876SPavel Tatashin size = PAGE_ALIGN(sizeof(struct memblock_region) * 37829f67386SYinghai Lu memblock.reserved.max); 3793010f876SPavel Tatashin __memblock_free_late(addr, size); 38029f67386SYinghai Lu } 38129f67386SYinghai Lu 38291b540f9SPavel Tatashin if (memblock.memory.regions != memblock_memory_init_regions) { 3833010f876SPavel Tatashin addr = __pa(memblock.memory.regions); 3843010f876SPavel Tatashin size = PAGE_ALIGN(sizeof(struct memblock_region) * 3855e270e25SPhilipp Hachtmann memblock.memory.max); 3863010f876SPavel Tatashin __memblock_free_late(addr, size); 3875e270e25SPhilipp Hachtmann } 3883010f876SPavel Tatashin } 3895e270e25SPhilipp Hachtmann #endif 3905e270e25SPhilipp Hachtmann 39148c3b583SGreg Pearson /** 39248c3b583SGreg Pearson * memblock_double_array - double the size of the memblock regions array 39348c3b583SGreg Pearson * @type: memblock type of the regions array being doubled 39448c3b583SGreg Pearson * @new_area_start: starting address of memory range to avoid overlap with 39548c3b583SGreg Pearson * @new_area_size: size of memory range to avoid overlap with 39648c3b583SGreg Pearson * 39748c3b583SGreg Pearson * Double the size of the @type regions array. If memblock is being used to 39848c3b583SGreg Pearson * allocate memory for a new reserved regions array and there is a previously 39948c3b583SGreg Pearson * allocated memory range [@new_area_start, @new_area_start + @new_area_size] 40048c3b583SGreg Pearson * waiting to be reserved, ensure the memory used by the new array does 40148c3b583SGreg Pearson * not overlap. 40248c3b583SGreg Pearson * 40347cec443SMike Rapoport * Return: 40448c3b583SGreg Pearson * 0 on success, -1 on failure. 40548c3b583SGreg Pearson */ 40648c3b583SGreg Pearson static int __init_memblock memblock_double_array(struct memblock_type *type, 40748c3b583SGreg Pearson phys_addr_t new_area_start, 40848c3b583SGreg Pearson phys_addr_t new_area_size) 409142b45a7SBenjamin Herrenschmidt { 410142b45a7SBenjamin Herrenschmidt struct memblock_region *new_array, *old_array; 41129f67386SYinghai Lu phys_addr_t old_alloc_size, new_alloc_size; 412a36aab89SMike Rapoport phys_addr_t old_size, new_size, addr, new_end; 413142b45a7SBenjamin Herrenschmidt int use_slab = slab_is_available(); 414181eb394SGavin Shan int *in_slab; 415142b45a7SBenjamin Herrenschmidt 416142b45a7SBenjamin Herrenschmidt /* We don't allow resizing until we know about the reserved regions 417142b45a7SBenjamin Herrenschmidt * of memory that aren't suitable for allocation 418142b45a7SBenjamin Herrenschmidt */ 419142b45a7SBenjamin Herrenschmidt if (!memblock_can_resize) 420142b45a7SBenjamin Herrenschmidt return -1; 421142b45a7SBenjamin Herrenschmidt 422142b45a7SBenjamin Herrenschmidt /* Calculate new doubled size */ 423142b45a7SBenjamin Herrenschmidt old_size = type->max * sizeof(struct memblock_region); 424142b45a7SBenjamin Herrenschmidt new_size = old_size << 1; 42529f67386SYinghai Lu /* 42629f67386SYinghai Lu * We need to allocated new one align to PAGE_SIZE, 42729f67386SYinghai Lu * so we can free them completely later. 42829f67386SYinghai Lu */ 42929f67386SYinghai Lu old_alloc_size = PAGE_ALIGN(old_size); 43029f67386SYinghai Lu new_alloc_size = PAGE_ALIGN(new_size); 431142b45a7SBenjamin Herrenschmidt 432181eb394SGavin Shan /* Retrieve the slab flag */ 433181eb394SGavin Shan if (type == &memblock.memory) 434181eb394SGavin Shan in_slab = &memblock_memory_in_slab; 435181eb394SGavin Shan else 436181eb394SGavin Shan in_slab = &memblock_reserved_in_slab; 437181eb394SGavin Shan 438142b45a7SBenjamin Herrenschmidt /* Try to find some space for it. 439142b45a7SBenjamin Herrenschmidt * 440142b45a7SBenjamin Herrenschmidt * WARNING: We assume that either slab_is_available() and we use it or 441fd07383bSAndrew Morton * we use MEMBLOCK for allocations. That means that this is unsafe to 442fd07383bSAndrew Morton * use when bootmem is currently active (unless bootmem itself is 443fd07383bSAndrew Morton * implemented on top of MEMBLOCK which isn't the case yet) 444142b45a7SBenjamin Herrenschmidt * 445142b45a7SBenjamin Herrenschmidt * This should however not be an issue for now, as we currently only 446fd07383bSAndrew Morton * call into MEMBLOCK while it's still active, or much later when slab 447fd07383bSAndrew Morton * is active for memory hotplug operations 448142b45a7SBenjamin Herrenschmidt */ 449142b45a7SBenjamin Herrenschmidt if (use_slab) { 450142b45a7SBenjamin Herrenschmidt new_array = kmalloc(new_size, GFP_KERNEL); 4511f5026a7STejun Heo addr = new_array ? __pa(new_array) : 0; 4524e2f0775SGavin Shan } else { 45348c3b583SGreg Pearson /* only exclude range when trying to double reserved.regions */ 45448c3b583SGreg Pearson if (type != &memblock.reserved) 45548c3b583SGreg Pearson new_area_start = new_area_size = 0; 45648c3b583SGreg Pearson 45748c3b583SGreg Pearson addr = memblock_find_in_range(new_area_start + new_area_size, 45848c3b583SGreg Pearson memblock.current_limit, 45929f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 46048c3b583SGreg Pearson if (!addr && new_area_size) 46148c3b583SGreg Pearson addr = memblock_find_in_range(0, 46248c3b583SGreg Pearson min(new_area_start, memblock.current_limit), 46329f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 46448c3b583SGreg Pearson 46515674868SSachin Kamat new_array = addr ? __va(addr) : NULL; 4664e2f0775SGavin Shan } 4671f5026a7STejun Heo if (!addr) { 468142b45a7SBenjamin Herrenschmidt pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", 4690262d9c8SHeiko Carstens type->name, type->max, type->max * 2); 470142b45a7SBenjamin Herrenschmidt return -1; 471142b45a7SBenjamin Herrenschmidt } 472142b45a7SBenjamin Herrenschmidt 473a36aab89SMike Rapoport new_end = addr + new_size - 1; 474a36aab89SMike Rapoport memblock_dbg("memblock: %s is doubled to %ld at [%pa-%pa]", 475a36aab89SMike Rapoport type->name, type->max * 2, &addr, &new_end); 476ea9e4376SYinghai Lu 477fd07383bSAndrew Morton /* 478fd07383bSAndrew Morton * Found space, we now need to move the array over before we add the 479fd07383bSAndrew Morton * reserved region since it may be our reserved array itself that is 480fd07383bSAndrew Morton * full. 481142b45a7SBenjamin Herrenschmidt */ 482142b45a7SBenjamin Herrenschmidt memcpy(new_array, type->regions, old_size); 483142b45a7SBenjamin Herrenschmidt memset(new_array + type->max, 0, old_size); 484142b45a7SBenjamin Herrenschmidt old_array = type->regions; 485142b45a7SBenjamin Herrenschmidt type->regions = new_array; 486142b45a7SBenjamin Herrenschmidt type->max <<= 1; 487142b45a7SBenjamin Herrenschmidt 488fd07383bSAndrew Morton /* Free old array. We needn't free it if the array is the static one */ 489181eb394SGavin Shan if (*in_slab) 490181eb394SGavin Shan kfree(old_array); 491181eb394SGavin Shan else if (old_array != memblock_memory_init_regions && 492142b45a7SBenjamin Herrenschmidt old_array != memblock_reserved_init_regions) 49329f67386SYinghai Lu memblock_free(__pa(old_array), old_alloc_size); 494142b45a7SBenjamin Herrenschmidt 495fd07383bSAndrew Morton /* 496fd07383bSAndrew Morton * Reserve the new array if that comes from the memblock. Otherwise, we 497fd07383bSAndrew Morton * needn't do it 498181eb394SGavin Shan */ 499181eb394SGavin Shan if (!use_slab) 50029f67386SYinghai Lu BUG_ON(memblock_reserve(addr, new_alloc_size)); 501181eb394SGavin Shan 502181eb394SGavin Shan /* Update slab flag */ 503181eb394SGavin Shan *in_slab = use_slab; 504181eb394SGavin Shan 505142b45a7SBenjamin Herrenschmidt return 0; 506142b45a7SBenjamin Herrenschmidt } 507142b45a7SBenjamin Herrenschmidt 508784656f9STejun Heo /** 509784656f9STejun Heo * memblock_merge_regions - merge neighboring compatible regions 510784656f9STejun Heo * @type: memblock type to scan 511784656f9STejun Heo * 512784656f9STejun Heo * Scan @type and merge neighboring compatible regions. 513784656f9STejun Heo */ 514784656f9STejun Heo static void __init_memblock memblock_merge_regions(struct memblock_type *type) 515784656f9STejun Heo { 516784656f9STejun Heo int i = 0; 517784656f9STejun Heo 518784656f9STejun Heo /* cnt never goes below 1 */ 519784656f9STejun Heo while (i < type->cnt - 1) { 520784656f9STejun Heo struct memblock_region *this = &type->regions[i]; 521784656f9STejun Heo struct memblock_region *next = &type->regions[i + 1]; 522784656f9STejun Heo 5237c0caeb8STejun Heo if (this->base + this->size != next->base || 5247c0caeb8STejun Heo memblock_get_region_node(this) != 52566a20757STang Chen memblock_get_region_node(next) || 52666a20757STang Chen this->flags != next->flags) { 527784656f9STejun Heo BUG_ON(this->base + this->size > next->base); 528784656f9STejun Heo i++; 529784656f9STejun Heo continue; 530784656f9STejun Heo } 531784656f9STejun Heo 532784656f9STejun Heo this->size += next->size; 533c0232ae8SLin Feng /* move forward from next + 1, index of which is i + 2 */ 534c0232ae8SLin Feng memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); 535784656f9STejun Heo type->cnt--; 536784656f9STejun Heo } 537784656f9STejun Heo } 538784656f9STejun Heo 539784656f9STejun Heo /** 540784656f9STejun Heo * memblock_insert_region - insert new memblock region 541784656f9STejun Heo * @type: memblock type to insert into 542784656f9STejun Heo * @idx: index for the insertion point 543784656f9STejun Heo * @base: base address of the new region 544784656f9STejun Heo * @size: size of the new region 545209ff86dSTang Chen * @nid: node id of the new region 54666a20757STang Chen * @flags: flags of the new region 547784656f9STejun Heo * 548784656f9STejun Heo * Insert new memblock region [@base, @base + @size) into @type at @idx. 549412d0008SAlexander Kuleshov * @type must already have extra room to accommodate the new region. 550784656f9STejun Heo */ 551784656f9STejun Heo static void __init_memblock memblock_insert_region(struct memblock_type *type, 552784656f9STejun Heo int idx, phys_addr_t base, 55366a20757STang Chen phys_addr_t size, 554e1720feeSMike Rapoport int nid, 555e1720feeSMike Rapoport enum memblock_flags flags) 556784656f9STejun Heo { 557784656f9STejun Heo struct memblock_region *rgn = &type->regions[idx]; 558784656f9STejun Heo 559784656f9STejun Heo BUG_ON(type->cnt >= type->max); 560784656f9STejun Heo memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); 561784656f9STejun Heo rgn->base = base; 562784656f9STejun Heo rgn->size = size; 56366a20757STang Chen rgn->flags = flags; 5647c0caeb8STejun Heo memblock_set_region_node(rgn, nid); 565784656f9STejun Heo type->cnt++; 5661440c4e2STejun Heo type->total_size += size; 567784656f9STejun Heo } 568784656f9STejun Heo 569784656f9STejun Heo /** 570f1af9d3aSPhilipp Hachtmann * memblock_add_range - add new memblock region 571784656f9STejun Heo * @type: memblock type to add new region into 572784656f9STejun Heo * @base: base address of the new region 573784656f9STejun Heo * @size: size of the new region 5747fb0bc3fSTejun Heo * @nid: nid of the new region 57566a20757STang Chen * @flags: flags of the new region 576784656f9STejun Heo * 577784656f9STejun Heo * Add new memblock region [@base, @base + @size) into @type. The new region 578784656f9STejun Heo * is allowed to overlap with existing ones - overlaps don't affect already 579784656f9STejun Heo * existing regions. @type is guaranteed to be minimal (all neighbouring 580784656f9STejun Heo * compatible regions are merged) after the addition. 581784656f9STejun Heo * 58247cec443SMike Rapoport * Return: 583784656f9STejun Heo * 0 on success, -errno on failure. 584784656f9STejun Heo */ 585f1af9d3aSPhilipp Hachtmann int __init_memblock memblock_add_range(struct memblock_type *type, 58666a20757STang Chen phys_addr_t base, phys_addr_t size, 587e1720feeSMike Rapoport int nid, enum memblock_flags flags) 58895f72d1eSYinghai Lu { 589784656f9STejun Heo bool insert = false; 590eb18f1b5STejun Heo phys_addr_t obase = base; 591eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 5928c9c1701SAlexander Kuleshov int idx, nr_new; 5938c9c1701SAlexander Kuleshov struct memblock_region *rgn; 59495f72d1eSYinghai Lu 595b3dc627cSTejun Heo if (!size) 596b3dc627cSTejun Heo return 0; 597b3dc627cSTejun Heo 598784656f9STejun Heo /* special case for empty array */ 599784656f9STejun Heo if (type->regions[0].size == 0) { 6001440c4e2STejun Heo WARN_ON(type->cnt != 1 || type->total_size); 601784656f9STejun Heo type->regions[0].base = base; 602784656f9STejun Heo type->regions[0].size = size; 60366a20757STang Chen type->regions[0].flags = flags; 6047fb0bc3fSTejun Heo memblock_set_region_node(&type->regions[0], nid); 6051440c4e2STejun Heo type->total_size = size; 606784656f9STejun Heo return 0; 607784656f9STejun Heo } 608784656f9STejun Heo repeat: 609784656f9STejun Heo /* 610784656f9STejun Heo * The following is executed twice. Once with %false @insert and 611784656f9STejun Heo * then with %true. The first counts the number of regions needed 612412d0008SAlexander Kuleshov * to accommodate the new area. The second actually inserts them. 613784656f9STejun Heo */ 614784656f9STejun Heo base = obase; 615784656f9STejun Heo nr_new = 0; 616784656f9STejun Heo 61766e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 618784656f9STejun Heo phys_addr_t rbase = rgn->base; 619784656f9STejun Heo phys_addr_t rend = rbase + rgn->size; 6208f7a6605SBenjamin Herrenschmidt 621784656f9STejun Heo if (rbase >= end) 6228f7a6605SBenjamin Herrenschmidt break; 623784656f9STejun Heo if (rend <= base) 624784656f9STejun Heo continue; 625784656f9STejun Heo /* 626784656f9STejun Heo * @rgn overlaps. If it separates the lower part of new 627784656f9STejun Heo * area, insert that portion. 6288f7a6605SBenjamin Herrenschmidt */ 629784656f9STejun Heo if (rbase > base) { 630c0a29498SWei Yang #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 631c0a29498SWei Yang WARN_ON(nid != memblock_get_region_node(rgn)); 632c0a29498SWei Yang #endif 6334fcab5f4SWei Yang WARN_ON(flags != rgn->flags); 634784656f9STejun Heo nr_new++; 635784656f9STejun Heo if (insert) 6368c9c1701SAlexander Kuleshov memblock_insert_region(type, idx++, base, 63766a20757STang Chen rbase - base, nid, 63866a20757STang Chen flags); 639784656f9STejun Heo } 640784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 641784656f9STejun Heo base = min(rend, end); 6428f7a6605SBenjamin Herrenschmidt } 6438f7a6605SBenjamin Herrenschmidt 644784656f9STejun Heo /* insert the remaining portion */ 645784656f9STejun Heo if (base < end) { 646784656f9STejun Heo nr_new++; 647784656f9STejun Heo if (insert) 6488c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, base, end - base, 64966a20757STang Chen nid, flags); 6508f7a6605SBenjamin Herrenschmidt } 6518f7a6605SBenjamin Herrenschmidt 652ef3cc4dbSnimisolo if (!nr_new) 653ef3cc4dbSnimisolo return 0; 654ef3cc4dbSnimisolo 655784656f9STejun Heo /* 656784656f9STejun Heo * If this was the first round, resize array and repeat for actual 657784656f9STejun Heo * insertions; otherwise, merge and return. 6588f7a6605SBenjamin Herrenschmidt */ 659784656f9STejun Heo if (!insert) { 660784656f9STejun Heo while (type->cnt + nr_new > type->max) 66148c3b583SGreg Pearson if (memblock_double_array(type, obase, size) < 0) 662784656f9STejun Heo return -ENOMEM; 663784656f9STejun Heo insert = true; 664784656f9STejun Heo goto repeat; 66595f72d1eSYinghai Lu } else { 666784656f9STejun Heo memblock_merge_regions(type); 66795f72d1eSYinghai Lu return 0; 66895f72d1eSYinghai Lu } 669784656f9STejun Heo } 67095f72d1eSYinghai Lu 67148a833ccSMike Rapoport /** 67248a833ccSMike Rapoport * memblock_add_node - add new memblock region within a NUMA node 67348a833ccSMike Rapoport * @base: base address of the new region 67448a833ccSMike Rapoport * @size: size of the new region 67548a833ccSMike Rapoport * @nid: nid of the new region 67648a833ccSMike Rapoport * 67748a833ccSMike Rapoport * Add new memblock region [@base, @base + @size) to the "memory" 67848a833ccSMike Rapoport * type. See memblock_add_range() description for mode details 67948a833ccSMike Rapoport * 68048a833ccSMike Rapoport * Return: 68148a833ccSMike Rapoport * 0 on success, -errno on failure. 68248a833ccSMike Rapoport */ 6837fb0bc3fSTejun Heo int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, 6847fb0bc3fSTejun Heo int nid) 6857fb0bc3fSTejun Heo { 686f1af9d3aSPhilipp Hachtmann return memblock_add_range(&memblock.memory, base, size, nid, 0); 6877fb0bc3fSTejun Heo } 6887fb0bc3fSTejun Heo 68948a833ccSMike Rapoport /** 69048a833ccSMike Rapoport * memblock_add - add new memblock region 69148a833ccSMike Rapoport * @base: base address of the new region 69248a833ccSMike Rapoport * @size: size of the new region 69348a833ccSMike Rapoport * 69448a833ccSMike Rapoport * Add new memblock region [@base, @base + @size) to the "memory" 69548a833ccSMike Rapoport * type. See memblock_add_range() description for mode details 69648a833ccSMike Rapoport * 69748a833ccSMike Rapoport * Return: 69848a833ccSMike Rapoport * 0 on success, -errno on failure. 69948a833ccSMike Rapoport */ 700f705ac4bSAlexander Kuleshov int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 7016a4055bcSAlexander Kuleshov { 7025d63f81cSMiles Chen phys_addr_t end = base + size - 1; 7035d63f81cSMiles Chen 7045d63f81cSMiles Chen memblock_dbg("memblock_add: [%pa-%pa] %pF\n", 7055d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 7066a4055bcSAlexander Kuleshov 707f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); 70895f72d1eSYinghai Lu } 70995f72d1eSYinghai Lu 7106a9ceb31STejun Heo /** 7116a9ceb31STejun Heo * memblock_isolate_range - isolate given range into disjoint memblocks 7126a9ceb31STejun Heo * @type: memblock type to isolate range for 7136a9ceb31STejun Heo * @base: base of range to isolate 7146a9ceb31STejun Heo * @size: size of range to isolate 7156a9ceb31STejun Heo * @start_rgn: out parameter for the start of isolated region 7166a9ceb31STejun Heo * @end_rgn: out parameter for the end of isolated region 7176a9ceb31STejun Heo * 7186a9ceb31STejun Heo * Walk @type and ensure that regions don't cross the boundaries defined by 7196a9ceb31STejun Heo * [@base, @base + @size). Crossing regions are split at the boundaries, 7206a9ceb31STejun Heo * which may create at most two more regions. The index of the first 7216a9ceb31STejun Heo * region inside the range is returned in *@start_rgn and end in *@end_rgn. 7226a9ceb31STejun Heo * 72347cec443SMike Rapoport * Return: 7246a9ceb31STejun Heo * 0 on success, -errno on failure. 7256a9ceb31STejun Heo */ 7266a9ceb31STejun Heo static int __init_memblock memblock_isolate_range(struct memblock_type *type, 7276a9ceb31STejun Heo phys_addr_t base, phys_addr_t size, 7286a9ceb31STejun Heo int *start_rgn, int *end_rgn) 7296a9ceb31STejun Heo { 730eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 7318c9c1701SAlexander Kuleshov int idx; 7328c9c1701SAlexander Kuleshov struct memblock_region *rgn; 7336a9ceb31STejun Heo 7346a9ceb31STejun Heo *start_rgn = *end_rgn = 0; 7356a9ceb31STejun Heo 736b3dc627cSTejun Heo if (!size) 737b3dc627cSTejun Heo return 0; 738b3dc627cSTejun Heo 7396a9ceb31STejun Heo /* we'll create at most two more regions */ 7406a9ceb31STejun Heo while (type->cnt + 2 > type->max) 74148c3b583SGreg Pearson if (memblock_double_array(type, base, size) < 0) 7426a9ceb31STejun Heo return -ENOMEM; 7436a9ceb31STejun Heo 74466e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 7456a9ceb31STejun Heo phys_addr_t rbase = rgn->base; 7466a9ceb31STejun Heo phys_addr_t rend = rbase + rgn->size; 7476a9ceb31STejun Heo 7486a9ceb31STejun Heo if (rbase >= end) 7496a9ceb31STejun Heo break; 7506a9ceb31STejun Heo if (rend <= base) 7516a9ceb31STejun Heo continue; 7526a9ceb31STejun Heo 7536a9ceb31STejun Heo if (rbase < base) { 7546a9ceb31STejun Heo /* 7556a9ceb31STejun Heo * @rgn intersects from below. Split and continue 7566a9ceb31STejun Heo * to process the next region - the new top half. 7576a9ceb31STejun Heo */ 7586a9ceb31STejun Heo rgn->base = base; 7591440c4e2STejun Heo rgn->size -= base - rbase; 7601440c4e2STejun Heo type->total_size -= base - rbase; 7618c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, rbase, base - rbase, 76266a20757STang Chen memblock_get_region_node(rgn), 76366a20757STang Chen rgn->flags); 7646a9ceb31STejun Heo } else if (rend > end) { 7656a9ceb31STejun Heo /* 7666a9ceb31STejun Heo * @rgn intersects from above. Split and redo the 7676a9ceb31STejun Heo * current region - the new bottom half. 7686a9ceb31STejun Heo */ 7696a9ceb31STejun Heo rgn->base = end; 7701440c4e2STejun Heo rgn->size -= end - rbase; 7711440c4e2STejun Heo type->total_size -= end - rbase; 7728c9c1701SAlexander Kuleshov memblock_insert_region(type, idx--, rbase, end - rbase, 77366a20757STang Chen memblock_get_region_node(rgn), 77466a20757STang Chen rgn->flags); 7756a9ceb31STejun Heo } else { 7766a9ceb31STejun Heo /* @rgn is fully contained, record it */ 7776a9ceb31STejun Heo if (!*end_rgn) 7788c9c1701SAlexander Kuleshov *start_rgn = idx; 7798c9c1701SAlexander Kuleshov *end_rgn = idx + 1; 7806a9ceb31STejun Heo } 7816a9ceb31STejun Heo } 7826a9ceb31STejun Heo 7836a9ceb31STejun Heo return 0; 7846a9ceb31STejun Heo } 7856a9ceb31STejun Heo 78635bd16a2SAlexander Kuleshov static int __init_memblock memblock_remove_range(struct memblock_type *type, 7878f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 78895f72d1eSYinghai Lu { 78971936180STejun Heo int start_rgn, end_rgn; 79071936180STejun Heo int i, ret; 79195f72d1eSYinghai Lu 79271936180STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 79371936180STejun Heo if (ret) 79471936180STejun Heo return ret; 79595f72d1eSYinghai Lu 79671936180STejun Heo for (i = end_rgn - 1; i >= start_rgn; i--) 79771936180STejun Heo memblock_remove_region(type, i); 79895f72d1eSYinghai Lu return 0; 79995f72d1eSYinghai Lu } 80095f72d1eSYinghai Lu 801581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 80295f72d1eSYinghai Lu { 80325cf23d7SMinchan Kim phys_addr_t end = base + size - 1; 80425cf23d7SMinchan Kim 80525cf23d7SMinchan Kim memblock_dbg("memblock_remove: [%pa-%pa] %pS\n", 80625cf23d7SMinchan Kim &base, &end, (void *)_RET_IP_); 80725cf23d7SMinchan Kim 808f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.memory, base, size); 80995f72d1eSYinghai Lu } 81095f72d1eSYinghai Lu 8114d72868cSMike Rapoport /** 8124d72868cSMike Rapoport * memblock_free - free boot memory block 8134d72868cSMike Rapoport * @base: phys starting address of the boot memory block 8144d72868cSMike Rapoport * @size: size of the boot memory block in bytes 8154d72868cSMike Rapoport * 8164d72868cSMike Rapoport * Free boot memory block previously allocated by memblock_alloc_xx() API. 8174d72868cSMike Rapoport * The freeing memory will not be released to the buddy allocator. 8184d72868cSMike Rapoport */ 819581adcbeSTejun Heo int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) 82095f72d1eSYinghai Lu { 8215d63f81cSMiles Chen phys_addr_t end = base + size - 1; 8225d63f81cSMiles Chen 8235d63f81cSMiles Chen memblock_dbg(" memblock_free: [%pa-%pa] %pF\n", 8245d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 82524aa0788STejun Heo 8269099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 827f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.reserved, base, size); 82895f72d1eSYinghai Lu } 82995f72d1eSYinghai Lu 830f705ac4bSAlexander Kuleshov int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 83195f72d1eSYinghai Lu { 8325d63f81cSMiles Chen phys_addr_t end = base + size - 1; 8335d63f81cSMiles Chen 8345d63f81cSMiles Chen memblock_dbg("memblock_reserve: [%pa-%pa] %pF\n", 8355d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 83695f72d1eSYinghai Lu 837f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); 83895f72d1eSYinghai Lu } 83995f72d1eSYinghai Lu 84035fd0808STejun Heo /** 84147cec443SMike Rapoport * memblock_setclr_flag - set or clear flag for a memory region 84247cec443SMike Rapoport * @base: base address of the region 84347cec443SMike Rapoport * @size: size of the region 84447cec443SMike Rapoport * @set: set or clear the flag 84547cec443SMike Rapoport * @flag: the flag to udpate 84666b16edfSTang Chen * 8474308ce17STony Luck * This function isolates region [@base, @base + @size), and sets/clears flag 84866b16edfSTang Chen * 84947cec443SMike Rapoport * Return: 0 on success, -errno on failure. 85066b16edfSTang Chen */ 8514308ce17STony Luck static int __init_memblock memblock_setclr_flag(phys_addr_t base, 8524308ce17STony Luck phys_addr_t size, int set, int flag) 85366b16edfSTang Chen { 85466b16edfSTang Chen struct memblock_type *type = &memblock.memory; 85566b16edfSTang Chen int i, ret, start_rgn, end_rgn; 85666b16edfSTang Chen 85766b16edfSTang Chen ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 85866b16edfSTang Chen if (ret) 85966b16edfSTang Chen return ret; 86066b16edfSTang Chen 861fe145124SMike Rapoport for (i = start_rgn; i < end_rgn; i++) { 862fe145124SMike Rapoport struct memblock_region *r = &type->regions[i]; 863fe145124SMike Rapoport 8644308ce17STony Luck if (set) 865fe145124SMike Rapoport r->flags |= flag; 8664308ce17STony Luck else 867fe145124SMike Rapoport r->flags &= ~flag; 868fe145124SMike Rapoport } 86966b16edfSTang Chen 87066b16edfSTang Chen memblock_merge_regions(type); 87166b16edfSTang Chen return 0; 87266b16edfSTang Chen } 87366b16edfSTang Chen 87466b16edfSTang Chen /** 8754308ce17STony Luck * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. 8764308ce17STony Luck * @base: the base phys addr of the region 8774308ce17STony Luck * @size: the size of the region 8784308ce17STony Luck * 87947cec443SMike Rapoport * Return: 0 on success, -errno on failure. 8804308ce17STony Luck */ 8814308ce17STony Luck int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) 8824308ce17STony Luck { 8834308ce17STony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); 8844308ce17STony Luck } 8854308ce17STony Luck 8864308ce17STony Luck /** 88766b16edfSTang Chen * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. 88866b16edfSTang Chen * @base: the base phys addr of the region 88966b16edfSTang Chen * @size: the size of the region 89066b16edfSTang Chen * 89147cec443SMike Rapoport * Return: 0 on success, -errno on failure. 89266b16edfSTang Chen */ 89366b16edfSTang Chen int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) 89466b16edfSTang Chen { 8954308ce17STony Luck return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); 89666b16edfSTang Chen } 89766b16edfSTang Chen 89866b16edfSTang Chen /** 899a3f5bafcSTony Luck * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. 900a3f5bafcSTony Luck * @base: the base phys addr of the region 901a3f5bafcSTony Luck * @size: the size of the region 902a3f5bafcSTony Luck * 90347cec443SMike Rapoport * Return: 0 on success, -errno on failure. 904a3f5bafcSTony Luck */ 905a3f5bafcSTony Luck int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) 906a3f5bafcSTony Luck { 907a3f5bafcSTony Luck system_has_some_mirror = true; 908a3f5bafcSTony Luck 909a3f5bafcSTony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); 910a3f5bafcSTony Luck } 911a3f5bafcSTony Luck 912bf3d3cc5SArd Biesheuvel /** 913bf3d3cc5SArd Biesheuvel * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. 914bf3d3cc5SArd Biesheuvel * @base: the base phys addr of the region 915bf3d3cc5SArd Biesheuvel * @size: the size of the region 916bf3d3cc5SArd Biesheuvel * 91747cec443SMike Rapoport * Return: 0 on success, -errno on failure. 918bf3d3cc5SArd Biesheuvel */ 919bf3d3cc5SArd Biesheuvel int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) 920bf3d3cc5SArd Biesheuvel { 921bf3d3cc5SArd Biesheuvel return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); 922bf3d3cc5SArd Biesheuvel } 923a3f5bafcSTony Luck 924a3f5bafcSTony Luck /** 9254c546b8aSAKASHI Takahiro * memblock_clear_nomap - Clear flag MEMBLOCK_NOMAP for a specified region. 9264c546b8aSAKASHI Takahiro * @base: the base phys addr of the region 9274c546b8aSAKASHI Takahiro * @size: the size of the region 9284c546b8aSAKASHI Takahiro * 92947cec443SMike Rapoport * Return: 0 on success, -errno on failure. 9304c546b8aSAKASHI Takahiro */ 9314c546b8aSAKASHI Takahiro int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size) 9324c546b8aSAKASHI Takahiro { 9334c546b8aSAKASHI Takahiro return memblock_setclr_flag(base, size, 0, MEMBLOCK_NOMAP); 9344c546b8aSAKASHI Takahiro } 9354c546b8aSAKASHI Takahiro 9364c546b8aSAKASHI Takahiro /** 9378e7a7f86SRobin Holt * __next_reserved_mem_region - next function for for_each_reserved_region() 9388e7a7f86SRobin Holt * @idx: pointer to u64 loop variable 9398e7a7f86SRobin Holt * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL 9408e7a7f86SRobin Holt * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL 9418e7a7f86SRobin Holt * 9428e7a7f86SRobin Holt * Iterate over all reserved memory regions. 9438e7a7f86SRobin Holt */ 9448e7a7f86SRobin Holt void __init_memblock __next_reserved_mem_region(u64 *idx, 9458e7a7f86SRobin Holt phys_addr_t *out_start, 9468e7a7f86SRobin Holt phys_addr_t *out_end) 9478e7a7f86SRobin Holt { 948567d117bSAlexander Kuleshov struct memblock_type *type = &memblock.reserved; 9498e7a7f86SRobin Holt 950cd33a76bSRichard Leitner if (*idx < type->cnt) { 951567d117bSAlexander Kuleshov struct memblock_region *r = &type->regions[*idx]; 9528e7a7f86SRobin Holt phys_addr_t base = r->base; 9538e7a7f86SRobin Holt phys_addr_t size = r->size; 9548e7a7f86SRobin Holt 9558e7a7f86SRobin Holt if (out_start) 9568e7a7f86SRobin Holt *out_start = base; 9578e7a7f86SRobin Holt if (out_end) 9588e7a7f86SRobin Holt *out_end = base + size - 1; 9598e7a7f86SRobin Holt 9608e7a7f86SRobin Holt *idx += 1; 9618e7a7f86SRobin Holt return; 9628e7a7f86SRobin Holt } 9638e7a7f86SRobin Holt 9648e7a7f86SRobin Holt /* signal end of iteration */ 9658e7a7f86SRobin Holt *idx = ULLONG_MAX; 9668e7a7f86SRobin Holt } 9678e7a7f86SRobin Holt 968*c9a688a3SMike Rapoport static bool should_skip_region(struct memblock_region *m, int nid, int flags) 969*c9a688a3SMike Rapoport { 970*c9a688a3SMike Rapoport int m_nid = memblock_get_region_node(m); 971*c9a688a3SMike Rapoport 972*c9a688a3SMike Rapoport /* only memory regions are associated with nodes, check it */ 973*c9a688a3SMike Rapoport if (nid != NUMA_NO_NODE && nid != m_nid) 974*c9a688a3SMike Rapoport return true; 975*c9a688a3SMike Rapoport 976*c9a688a3SMike Rapoport /* skip hotpluggable memory regions if needed */ 977*c9a688a3SMike Rapoport if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 978*c9a688a3SMike Rapoport return true; 979*c9a688a3SMike Rapoport 980*c9a688a3SMike Rapoport /* if we want mirror memory skip non-mirror memory regions */ 981*c9a688a3SMike Rapoport if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 982*c9a688a3SMike Rapoport return true; 983*c9a688a3SMike Rapoport 984*c9a688a3SMike Rapoport /* skip nomap memory unless we were asked for it explicitly */ 985*c9a688a3SMike Rapoport if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) 986*c9a688a3SMike Rapoport return true; 987*c9a688a3SMike Rapoport 988*c9a688a3SMike Rapoport return false; 989*c9a688a3SMike Rapoport } 990*c9a688a3SMike Rapoport 9918e7a7f86SRobin Holt /** 992f1af9d3aSPhilipp Hachtmann * __next__mem_range - next function for for_each_free_mem_range() etc. 99335fd0808STejun Heo * @idx: pointer to u64 loop variable 994b1154233SGrygorii Strashko * @nid: node selector, %NUMA_NO_NODE for all nodes 995fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 996f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 997f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 998dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 999dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 1000dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 100135fd0808STejun Heo * 1002f1af9d3aSPhilipp Hachtmann * Find the first area from *@idx which matches @nid, fill the out 100335fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 1004f1af9d3aSPhilipp Hachtmann * *@idx contains index into type_a and the upper 32bit indexes the 1005f1af9d3aSPhilipp Hachtmann * areas before each region in type_b. For example, if type_b regions 100635fd0808STejun Heo * look like the following, 100735fd0808STejun Heo * 100835fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 100935fd0808STejun Heo * 101035fd0808STejun Heo * The upper 32bit indexes the following regions. 101135fd0808STejun Heo * 101235fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 101335fd0808STejun Heo * 101435fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 101535fd0808STejun Heo * in lockstep and returns each intersection. 101635fd0808STejun Heo */ 1017e1720feeSMike Rapoport void __init_memblock __next_mem_range(u64 *idx, int nid, 1018e1720feeSMike Rapoport enum memblock_flags flags, 1019f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 1020f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 102135fd0808STejun Heo phys_addr_t *out_start, 102235fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 102335fd0808STejun Heo { 1024f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 1025f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 1026b1154233SGrygorii Strashko 1027f1af9d3aSPhilipp Hachtmann if (WARN_ONCE(nid == MAX_NUMNODES, 1028f1af9d3aSPhilipp Hachtmann "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1029560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 103035fd0808STejun Heo 1031f1af9d3aSPhilipp Hachtmann for (; idx_a < type_a->cnt; idx_a++) { 1032f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1033f1af9d3aSPhilipp Hachtmann 103435fd0808STejun Heo phys_addr_t m_start = m->base; 103535fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 1036f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 103735fd0808STejun Heo 1038*c9a688a3SMike Rapoport if (should_skip_region(m, nid, flags)) 1039bf3d3cc5SArd Biesheuvel continue; 1040bf3d3cc5SArd Biesheuvel 1041f1af9d3aSPhilipp Hachtmann if (!type_b) { 1042f1af9d3aSPhilipp Hachtmann if (out_start) 1043f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1044f1af9d3aSPhilipp Hachtmann if (out_end) 1045f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1046f1af9d3aSPhilipp Hachtmann if (out_nid) 1047f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1048f1af9d3aSPhilipp Hachtmann idx_a++; 1049f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1050f1af9d3aSPhilipp Hachtmann return; 1051f1af9d3aSPhilipp Hachtmann } 105235fd0808STejun Heo 1053f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1054f1af9d3aSPhilipp Hachtmann for (; idx_b < type_b->cnt + 1; idx_b++) { 1055f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1056f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1057f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1058f1af9d3aSPhilipp Hachtmann 1059f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1060f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1061f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 10621c4bc43dSStefan Agner r->base : PHYS_ADDR_MAX; 1063f1af9d3aSPhilipp Hachtmann 1064f1af9d3aSPhilipp Hachtmann /* 1065f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1066f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1067f1af9d3aSPhilipp Hachtmann */ 106835fd0808STejun Heo if (r_start >= m_end) 106935fd0808STejun Heo break; 107035fd0808STejun Heo /* if the two regions intersect, we're done */ 107135fd0808STejun Heo if (m_start < r_end) { 107235fd0808STejun Heo if (out_start) 1073f1af9d3aSPhilipp Hachtmann *out_start = 1074f1af9d3aSPhilipp Hachtmann max(m_start, r_start); 107535fd0808STejun Heo if (out_end) 107635fd0808STejun Heo *out_end = min(m_end, r_end); 107735fd0808STejun Heo if (out_nid) 1078f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 107935fd0808STejun Heo /* 1080f1af9d3aSPhilipp Hachtmann * The region which ends first is 1081f1af9d3aSPhilipp Hachtmann * advanced for the next iteration. 108235fd0808STejun Heo */ 108335fd0808STejun Heo if (m_end <= r_end) 1084f1af9d3aSPhilipp Hachtmann idx_a++; 108535fd0808STejun Heo else 1086f1af9d3aSPhilipp Hachtmann idx_b++; 1087f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 108835fd0808STejun Heo return; 108935fd0808STejun Heo } 109035fd0808STejun Heo } 109135fd0808STejun Heo } 109235fd0808STejun Heo 109335fd0808STejun Heo /* signal end of iteration */ 109435fd0808STejun Heo *idx = ULLONG_MAX; 109535fd0808STejun Heo } 109635fd0808STejun Heo 10977bd0b0f0STejun Heo /** 1098f1af9d3aSPhilipp Hachtmann * __next_mem_range_rev - generic next function for for_each_*_range_rev() 1099f1af9d3aSPhilipp Hachtmann * 11007bd0b0f0STejun Heo * @idx: pointer to u64 loop variable 1101ad5ea8cdSAlexander Kuleshov * @nid: node selector, %NUMA_NO_NODE for all nodes 1102fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1103f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 1104f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 1105dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 1106dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 1107dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 11087bd0b0f0STejun Heo * 110947cec443SMike Rapoport * Finds the next range from type_a which is not marked as unsuitable 111047cec443SMike Rapoport * in type_b. 111147cec443SMike Rapoport * 1112f1af9d3aSPhilipp Hachtmann * Reverse of __next_mem_range(). 11137bd0b0f0STejun Heo */ 1114e1720feeSMike Rapoport void __init_memblock __next_mem_range_rev(u64 *idx, int nid, 1115e1720feeSMike Rapoport enum memblock_flags flags, 1116f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 1117f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 11187bd0b0f0STejun Heo phys_addr_t *out_start, 11197bd0b0f0STejun Heo phys_addr_t *out_end, int *out_nid) 11207bd0b0f0STejun Heo { 1121f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 1122f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 1123b1154233SGrygorii Strashko 1124560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1125560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 11267bd0b0f0STejun Heo 11277bd0b0f0STejun Heo if (*idx == (u64)ULLONG_MAX) { 1128f1af9d3aSPhilipp Hachtmann idx_a = type_a->cnt - 1; 1129e47608abSzijun_hu if (type_b != NULL) 1130f1af9d3aSPhilipp Hachtmann idx_b = type_b->cnt; 1131e47608abSzijun_hu else 1132e47608abSzijun_hu idx_b = 0; 11337bd0b0f0STejun Heo } 11347bd0b0f0STejun Heo 1135f1af9d3aSPhilipp Hachtmann for (; idx_a >= 0; idx_a--) { 1136f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1137f1af9d3aSPhilipp Hachtmann 11387bd0b0f0STejun Heo phys_addr_t m_start = m->base; 11397bd0b0f0STejun Heo phys_addr_t m_end = m->base + m->size; 1140f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 11417bd0b0f0STejun Heo 1142*c9a688a3SMike Rapoport if (should_skip_region(m, nid, flags)) 1143bf3d3cc5SArd Biesheuvel continue; 1144bf3d3cc5SArd Biesheuvel 1145f1af9d3aSPhilipp Hachtmann if (!type_b) { 1146f1af9d3aSPhilipp Hachtmann if (out_start) 1147f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1148f1af9d3aSPhilipp Hachtmann if (out_end) 1149f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1150f1af9d3aSPhilipp Hachtmann if (out_nid) 1151f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1152fb399b48Szijun_hu idx_a--; 1153f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1154f1af9d3aSPhilipp Hachtmann return; 1155f1af9d3aSPhilipp Hachtmann } 11567bd0b0f0STejun Heo 1157f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1158f1af9d3aSPhilipp Hachtmann for (; idx_b >= 0; idx_b--) { 1159f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1160f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1161f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1162f1af9d3aSPhilipp Hachtmann 1163f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1164f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1165f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 11661c4bc43dSStefan Agner r->base : PHYS_ADDR_MAX; 1167f1af9d3aSPhilipp Hachtmann /* 1168f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1169f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1170f1af9d3aSPhilipp Hachtmann */ 1171f1af9d3aSPhilipp Hachtmann 11727bd0b0f0STejun Heo if (r_end <= m_start) 11737bd0b0f0STejun Heo break; 11747bd0b0f0STejun Heo /* if the two regions intersect, we're done */ 11757bd0b0f0STejun Heo if (m_end > r_start) { 11767bd0b0f0STejun Heo if (out_start) 11777bd0b0f0STejun Heo *out_start = max(m_start, r_start); 11787bd0b0f0STejun Heo if (out_end) 11797bd0b0f0STejun Heo *out_end = min(m_end, r_end); 11807bd0b0f0STejun Heo if (out_nid) 1181f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 11827bd0b0f0STejun Heo if (m_start >= r_start) 1183f1af9d3aSPhilipp Hachtmann idx_a--; 11847bd0b0f0STejun Heo else 1185f1af9d3aSPhilipp Hachtmann idx_b--; 1186f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 11877bd0b0f0STejun Heo return; 11887bd0b0f0STejun Heo } 11897bd0b0f0STejun Heo } 11907bd0b0f0STejun Heo } 1191f1af9d3aSPhilipp Hachtmann /* signal end of iteration */ 11927bd0b0f0STejun Heo *idx = ULLONG_MAX; 11937bd0b0f0STejun Heo } 11947bd0b0f0STejun Heo 11957c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 11967c0caeb8STejun Heo /* 119745e79815SChen Chang * Common iterator interface used to define for_each_mem_pfn_range(). 11987c0caeb8STejun Heo */ 11997c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 12007c0caeb8STejun Heo unsigned long *out_start_pfn, 12017c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 12027c0caeb8STejun Heo { 12037c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 12047c0caeb8STejun Heo struct memblock_region *r; 12057c0caeb8STejun Heo 12067c0caeb8STejun Heo while (++*idx < type->cnt) { 12077c0caeb8STejun Heo r = &type->regions[*idx]; 12087c0caeb8STejun Heo 12097c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 12107c0caeb8STejun Heo continue; 12117c0caeb8STejun Heo if (nid == MAX_NUMNODES || nid == r->nid) 12127c0caeb8STejun Heo break; 12137c0caeb8STejun Heo } 12147c0caeb8STejun Heo if (*idx >= type->cnt) { 12157c0caeb8STejun Heo *idx = -1; 12167c0caeb8STejun Heo return; 12177c0caeb8STejun Heo } 12187c0caeb8STejun Heo 12197c0caeb8STejun Heo if (out_start_pfn) 12207c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 12217c0caeb8STejun Heo if (out_end_pfn) 12227c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 12237c0caeb8STejun Heo if (out_nid) 12247c0caeb8STejun Heo *out_nid = r->nid; 12257c0caeb8STejun Heo } 12267c0caeb8STejun Heo 12277c0caeb8STejun Heo /** 12287c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 12297c0caeb8STejun Heo * @base: base of area to set node ID for 12307c0caeb8STejun Heo * @size: size of area to set node ID for 1231e7e8de59STang Chen * @type: memblock type to set node ID for 12327c0caeb8STejun Heo * @nid: node ID to set 12337c0caeb8STejun Heo * 1234e7e8de59STang Chen * Set the nid of memblock @type regions in [@base, @base + @size) to @nid. 12357c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 12367c0caeb8STejun Heo * 123747cec443SMike Rapoport * Return: 12387c0caeb8STejun Heo * 0 on success, -errno on failure. 12397c0caeb8STejun Heo */ 12407c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 1241e7e8de59STang Chen struct memblock_type *type, int nid) 12427c0caeb8STejun Heo { 12436a9ceb31STejun Heo int start_rgn, end_rgn; 12446a9ceb31STejun Heo int i, ret; 12457c0caeb8STejun Heo 12466a9ceb31STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 12476a9ceb31STejun Heo if (ret) 12486a9ceb31STejun Heo return ret; 12497c0caeb8STejun Heo 12506a9ceb31STejun Heo for (i = start_rgn; i < end_rgn; i++) 1251e9d24ad3SWanpeng Li memblock_set_region_node(&type->regions[i], nid); 12527c0caeb8STejun Heo 12537c0caeb8STejun Heo memblock_merge_regions(type); 12547c0caeb8STejun Heo return 0; 12557c0caeb8STejun Heo } 12567c0caeb8STejun Heo #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ 12577c0caeb8STejun Heo 125892d12f95SMike Rapoport /** 125992d12f95SMike Rapoport * memblock_alloc_range_nid - allocate boot memory block 126092d12f95SMike Rapoport * @size: size of memory block to be allocated in bytes 126192d12f95SMike Rapoport * @align: alignment of the region and block's size 126292d12f95SMike Rapoport * @start: the lower bound of the memory region to allocate (phys address) 126392d12f95SMike Rapoport * @end: the upper bound of the memory region to allocate (phys address) 126492d12f95SMike Rapoport * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 126592d12f95SMike Rapoport * 126692d12f95SMike Rapoport * The allocation is performed from memory region limited by 126792d12f95SMike Rapoport * memblock.current_limit if @max_addr == %MEMBLOCK_ALLOC_ACCESSIBLE. 126892d12f95SMike Rapoport * 126992d12f95SMike Rapoport * If the specified node can not hold the requested memory the 127092d12f95SMike Rapoport * allocation falls back to any node in the system 127192d12f95SMike Rapoport * 127292d12f95SMike Rapoport * For systems with memory mirroring, the allocation is attempted first 127392d12f95SMike Rapoport * from the regions with mirroring enabled and then retried from any 127492d12f95SMike Rapoport * memory region. 127592d12f95SMike Rapoport * 127692d12f95SMike Rapoport * In addition, function sets the min_count to 0 using kmemleak_alloc_phys for 127792d12f95SMike Rapoport * allocated boot memory block, so that it is never reported as leaks. 127892d12f95SMike Rapoport * 127992d12f95SMike Rapoport * Return: 128092d12f95SMike Rapoport * Physical address of allocated memory block on success, %0 on failure. 128192d12f95SMike Rapoport */ 12822bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, 12832bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t start, 128492d12f95SMike Rapoport phys_addr_t end, int nid) 128595f72d1eSYinghai Lu { 128692d12f95SMike Rapoport enum memblock_flags flags = choose_memblock_flags(); 12876ed311b2SBenjamin Herrenschmidt phys_addr_t found; 128895f72d1eSYinghai Lu 128992d12f95SMike Rapoport if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 129092d12f95SMike Rapoport nid = NUMA_NO_NODE; 129192d12f95SMike Rapoport 12922f770806SMike Rapoport if (!align) { 12932f770806SMike Rapoport /* Can't use WARNs this early in boot on powerpc */ 12942f770806SMike Rapoport dump_stack(); 12952f770806SMike Rapoport align = SMP_CACHE_BYTES; 12962f770806SMike Rapoport } 12972f770806SMike Rapoport 129892d12f95SMike Rapoport if (end > memblock.current_limit) 129992d12f95SMike Rapoport end = memblock.current_limit; 130092d12f95SMike Rapoport 130192d12f95SMike Rapoport again: 1302fc6daaf9STony Luck found = memblock_find_in_range_node(size, align, start, end, nid, 1303fc6daaf9STony Luck flags); 130492d12f95SMike Rapoport if (found && !memblock_reserve(found, size)) 130592d12f95SMike Rapoport goto done; 130692d12f95SMike Rapoport 130792d12f95SMike Rapoport if (nid != NUMA_NO_NODE) { 130892d12f95SMike Rapoport found = memblock_find_in_range_node(size, align, start, 130992d12f95SMike Rapoport end, NUMA_NO_NODE, 131092d12f95SMike Rapoport flags); 131192d12f95SMike Rapoport if (found && !memblock_reserve(found, size)) 131292d12f95SMike Rapoport goto done; 131392d12f95SMike Rapoport } 131492d12f95SMike Rapoport 131592d12f95SMike Rapoport if (flags & MEMBLOCK_MIRROR) { 131692d12f95SMike Rapoport flags &= ~MEMBLOCK_MIRROR; 131792d12f95SMike Rapoport pr_warn("Could not allocate %pap bytes of mirrored memory\n", 131892d12f95SMike Rapoport &size); 131992d12f95SMike Rapoport goto again; 132092d12f95SMike Rapoport } 132192d12f95SMike Rapoport 132292d12f95SMike Rapoport return 0; 132392d12f95SMike Rapoport 132492d12f95SMike Rapoport done: 132592d12f95SMike Rapoport /* Skip kmemleak for kasan_init() due to high volume. */ 132692d12f95SMike Rapoport if (end != MEMBLOCK_ALLOC_KASAN) 1327aedf95eaSCatalin Marinas /* 132892d12f95SMike Rapoport * The min_count is set to 0 so that memblock allocated 132992d12f95SMike Rapoport * blocks are never reported as leaks. This is because many 133092d12f95SMike Rapoport * of these blocks are only referred via the physical 133192d12f95SMike Rapoport * address which is not looked up by kmemleak. 1332aedf95eaSCatalin Marinas */ 13339099daedSCatalin Marinas kmemleak_alloc_phys(found, size, 0, 0); 133492d12f95SMike Rapoport 13356ed311b2SBenjamin Herrenschmidt return found; 1336aedf95eaSCatalin Marinas } 133795f72d1eSYinghai Lu 13388a770c2aSMike Rapoport phys_addr_t __init memblock_phys_alloc_range(phys_addr_t size, 13398a770c2aSMike Rapoport phys_addr_t align, 13408a770c2aSMike Rapoport phys_addr_t start, 13418a770c2aSMike Rapoport phys_addr_t end) 13422bfc2862SAkinobu Mita { 134392d12f95SMike Rapoport return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE); 13447bd0b0f0STejun Heo } 13457bd0b0f0STejun Heo 13469a8dd708SMike Rapoport phys_addr_t __init memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 13479d1e2492SBenjamin Herrenschmidt { 134833755574SMike Rapoport return memblock_alloc_range_nid(size, align, 0, 134992d12f95SMike Rapoport MEMBLOCK_ALLOC_ACCESSIBLE, nid); 135095f72d1eSYinghai Lu } 135195f72d1eSYinghai Lu 135226f09e9bSSantosh Shilimkar /** 1353eb31d559SMike Rapoport * memblock_alloc_internal - allocate boot memory block 135426f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 135526f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 135626f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region to allocate (phys address) 135726f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region to allocate (phys address) 135826f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 135926f09e9bSSantosh Shilimkar * 136092d12f95SMike Rapoport * Allocates memory block using memblock_alloc_range_nid() and 136192d12f95SMike Rapoport * converts the returned physical address to virtual. 136292d12f95SMike Rapoport * 136326f09e9bSSantosh Shilimkar * The @min_addr limit is dropped if it can not be satisfied and the allocation 136492d12f95SMike Rapoport * will fall back to memory below @min_addr. Other constraints, such 136592d12f95SMike Rapoport * as node and mirrored memory will be handled again in 136692d12f95SMike Rapoport * memblock_alloc_range_nid(). 136726f09e9bSSantosh Shilimkar * 136847cec443SMike Rapoport * Return: 136926f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 137026f09e9bSSantosh Shilimkar */ 1371eb31d559SMike Rapoport static void * __init memblock_alloc_internal( 137226f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 137326f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 137426f09e9bSSantosh Shilimkar int nid) 137526f09e9bSSantosh Shilimkar { 137626f09e9bSSantosh Shilimkar phys_addr_t alloc; 137726f09e9bSSantosh Shilimkar 137826f09e9bSSantosh Shilimkar /* 137926f09e9bSSantosh Shilimkar * Detect any accidental use of these APIs after slab is ready, as at 138026f09e9bSSantosh Shilimkar * this moment memblock may be deinitialized already and its 1381c6ffc5caSMike Rapoport * internal data may be destroyed (after execution of memblock_free_all) 138226f09e9bSSantosh Shilimkar */ 138326f09e9bSSantosh Shilimkar if (WARN_ON_ONCE(slab_is_available())) 138426f09e9bSSantosh Shilimkar return kzalloc_node(size, GFP_NOWAIT, nid); 138526f09e9bSSantosh Shilimkar 138692d12f95SMike Rapoport alloc = memblock_alloc_range_nid(size, align, min_addr, max_addr, nid); 13872f770806SMike Rapoport 138892d12f95SMike Rapoport /* retry allocation without lower limit */ 138992d12f95SMike Rapoport if (!alloc && min_addr) 139092d12f95SMike Rapoport alloc = memblock_alloc_range_nid(size, align, 0, max_addr, nid); 139126f09e9bSSantosh Shilimkar 139292d12f95SMike Rapoport if (!alloc) 1393a3f5bafcSTony Luck return NULL; 139426f09e9bSSantosh Shilimkar 139592d12f95SMike Rapoport return phys_to_virt(alloc); 139626f09e9bSSantosh Shilimkar } 139726f09e9bSSantosh Shilimkar 139826f09e9bSSantosh Shilimkar /** 1399eb31d559SMike Rapoport * memblock_alloc_try_nid_raw - allocate boot memory block without zeroing 1400ea1f5f37SPavel Tatashin * memory and without panicking 1401ea1f5f37SPavel Tatashin * @size: size of memory block to be allocated in bytes 1402ea1f5f37SPavel Tatashin * @align: alignment of the region and block's size 1403ea1f5f37SPavel Tatashin * @min_addr: the lower bound of the memory region from where the allocation 1404ea1f5f37SPavel Tatashin * is preferred (phys address) 1405ea1f5f37SPavel Tatashin * @max_addr: the upper bound of the memory region from where the allocation 140697ad1087SMike Rapoport * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to 1407ea1f5f37SPavel Tatashin * allocate only from memory limited by memblock.current_limit value 1408ea1f5f37SPavel Tatashin * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 1409ea1f5f37SPavel Tatashin * 1410ea1f5f37SPavel Tatashin * Public function, provides additional debug information (including caller 1411ea1f5f37SPavel Tatashin * info), if enabled. Does not zero allocated memory, does not panic if request 1412ea1f5f37SPavel Tatashin * cannot be satisfied. 1413ea1f5f37SPavel Tatashin * 141447cec443SMike Rapoport * Return: 1415ea1f5f37SPavel Tatashin * Virtual address of allocated memory block on success, NULL on failure. 1416ea1f5f37SPavel Tatashin */ 1417eb31d559SMike Rapoport void * __init memblock_alloc_try_nid_raw( 1418ea1f5f37SPavel Tatashin phys_addr_t size, phys_addr_t align, 1419ea1f5f37SPavel Tatashin phys_addr_t min_addr, phys_addr_t max_addr, 1420ea1f5f37SPavel Tatashin int nid) 1421ea1f5f37SPavel Tatashin { 1422ea1f5f37SPavel Tatashin void *ptr; 1423ea1f5f37SPavel Tatashin 1424a36aab89SMike Rapoport memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pF\n", 1425a36aab89SMike Rapoport __func__, (u64)size, (u64)align, nid, &min_addr, 1426a36aab89SMike Rapoport &max_addr, (void *)_RET_IP_); 1427ea1f5f37SPavel Tatashin 1428eb31d559SMike Rapoport ptr = memblock_alloc_internal(size, align, 1429ea1f5f37SPavel Tatashin min_addr, max_addr, nid); 1430ea1f5f37SPavel Tatashin if (ptr && size > 0) 1431f682a97aSAlexander Duyck page_init_poison(ptr, size); 1432f682a97aSAlexander Duyck 1433ea1f5f37SPavel Tatashin return ptr; 1434ea1f5f37SPavel Tatashin } 1435ea1f5f37SPavel Tatashin 1436ea1f5f37SPavel Tatashin /** 1437c0dbe825SMike Rapoport * memblock_alloc_try_nid - allocate boot memory block 143826f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 143926f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 144026f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 144126f09e9bSSantosh Shilimkar * is preferred (phys address) 144226f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 144397ad1087SMike Rapoport * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to 144426f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 144526f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 144626f09e9bSSantosh Shilimkar * 1447c0dbe825SMike Rapoport * Public function, provides additional debug information (including caller 1448c0dbe825SMike Rapoport * info), if enabled. This function zeroes the allocated memory. 144926f09e9bSSantosh Shilimkar * 145047cec443SMike Rapoport * Return: 145126f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 145226f09e9bSSantosh Shilimkar */ 1453eb31d559SMike Rapoport void * __init memblock_alloc_try_nid( 145426f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 145526f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 145626f09e9bSSantosh Shilimkar int nid) 145726f09e9bSSantosh Shilimkar { 145826f09e9bSSantosh Shilimkar void *ptr; 145926f09e9bSSantosh Shilimkar 1460a36aab89SMike Rapoport memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pF\n", 1461a36aab89SMike Rapoport __func__, (u64)size, (u64)align, nid, &min_addr, 1462a36aab89SMike Rapoport &max_addr, (void *)_RET_IP_); 1463eb31d559SMike Rapoport ptr = memblock_alloc_internal(size, align, 146426f09e9bSSantosh Shilimkar min_addr, max_addr, nid); 1465c0dbe825SMike Rapoport if (ptr) 1466ea1f5f37SPavel Tatashin memset(ptr, 0, size); 146726f09e9bSSantosh Shilimkar 1468c0dbe825SMike Rapoport return ptr; 146926f09e9bSSantosh Shilimkar } 147026f09e9bSSantosh Shilimkar 147126f09e9bSSantosh Shilimkar /** 147226f09e9bSSantosh Shilimkar * __memblock_free_late - free bootmem block pages directly to buddy allocator 147348a833ccSMike Rapoport * @base: phys starting address of the boot memory block 147426f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 147526f09e9bSSantosh Shilimkar * 147626f09e9bSSantosh Shilimkar * This is only useful when the bootmem allocator has already been torn 147726f09e9bSSantosh Shilimkar * down, but we are still initializing the system. Pages are released directly 147826f09e9bSSantosh Shilimkar * to the buddy allocator, no bootmem metadata is updated because it is gone. 147926f09e9bSSantosh Shilimkar */ 148026f09e9bSSantosh Shilimkar void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) 148126f09e9bSSantosh Shilimkar { 1482a36aab89SMike Rapoport phys_addr_t cursor, end; 148326f09e9bSSantosh Shilimkar 1484a36aab89SMike Rapoport end = base + size - 1; 1485a36aab89SMike Rapoport memblock_dbg("%s: [%pa-%pa] %pF\n", 1486a36aab89SMike Rapoport __func__, &base, &end, (void *)_RET_IP_); 14879099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 148826f09e9bSSantosh Shilimkar cursor = PFN_UP(base); 148926f09e9bSSantosh Shilimkar end = PFN_DOWN(base + size); 149026f09e9bSSantosh Shilimkar 149126f09e9bSSantosh Shilimkar for (; cursor < end; cursor++) { 14927c2ee349SMike Rapoport memblock_free_pages(pfn_to_page(cursor), cursor, 0); 1493ca79b0c2SArun KS totalram_pages_inc(); 149426f09e9bSSantosh Shilimkar } 149526f09e9bSSantosh Shilimkar } 14969d1e2492SBenjamin Herrenschmidt 14979d1e2492SBenjamin Herrenschmidt /* 14989d1e2492SBenjamin Herrenschmidt * Remaining API functions 14999d1e2492SBenjamin Herrenschmidt */ 15009d1e2492SBenjamin Herrenschmidt 15011f1ffb8aSDavid Gibson phys_addr_t __init_memblock memblock_phys_mem_size(void) 150295f72d1eSYinghai Lu { 15031440c4e2STejun Heo return memblock.memory.total_size; 150495f72d1eSYinghai Lu } 150595f72d1eSYinghai Lu 15068907de5dSSrikar Dronamraju phys_addr_t __init_memblock memblock_reserved_size(void) 15078907de5dSSrikar Dronamraju { 15088907de5dSSrikar Dronamraju return memblock.reserved.total_size; 15098907de5dSSrikar Dronamraju } 15108907de5dSSrikar Dronamraju 1511595ad9afSYinghai Lu phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) 1512595ad9afSYinghai Lu { 1513595ad9afSYinghai Lu unsigned long pages = 0; 1514595ad9afSYinghai Lu struct memblock_region *r; 1515595ad9afSYinghai Lu unsigned long start_pfn, end_pfn; 1516595ad9afSYinghai Lu 1517595ad9afSYinghai Lu for_each_memblock(memory, r) { 1518595ad9afSYinghai Lu start_pfn = memblock_region_memory_base_pfn(r); 1519595ad9afSYinghai Lu end_pfn = memblock_region_memory_end_pfn(r); 1520595ad9afSYinghai Lu start_pfn = min_t(unsigned long, start_pfn, limit_pfn); 1521595ad9afSYinghai Lu end_pfn = min_t(unsigned long, end_pfn, limit_pfn); 1522595ad9afSYinghai Lu pages += end_pfn - start_pfn; 1523595ad9afSYinghai Lu } 1524595ad9afSYinghai Lu 152516763230SFabian Frederick return PFN_PHYS(pages); 1526595ad9afSYinghai Lu } 1527595ad9afSYinghai Lu 15280a93ebefSSam Ravnborg /* lowest address */ 15290a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 15300a93ebefSSam Ravnborg { 15310a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 15320a93ebefSSam Ravnborg } 15330a93ebefSSam Ravnborg 153410d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 153595f72d1eSYinghai Lu { 153695f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 153795f72d1eSYinghai Lu 1538e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 153995f72d1eSYinghai Lu } 154095f72d1eSYinghai Lu 1541a571d4ebSDennis Chen static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit) 154295f72d1eSYinghai Lu { 15431c4bc43dSStefan Agner phys_addr_t max_addr = PHYS_ADDR_MAX; 1544136199f0SEmil Medve struct memblock_region *r; 154595f72d1eSYinghai Lu 1546a571d4ebSDennis Chen /* 1547a571d4ebSDennis Chen * translate the memory @limit size into the max address within one of 1548a571d4ebSDennis Chen * the memory memblock regions, if the @limit exceeds the total size 15491c4bc43dSStefan Agner * of those regions, max_addr will keep original value PHYS_ADDR_MAX 1550a571d4ebSDennis Chen */ 1551136199f0SEmil Medve for_each_memblock(memory, r) { 1552c0ce8fefSTejun Heo if (limit <= r->size) { 1553c0ce8fefSTejun Heo max_addr = r->base + limit; 155495f72d1eSYinghai Lu break; 155595f72d1eSYinghai Lu } 1556c0ce8fefSTejun Heo limit -= r->size; 155795f72d1eSYinghai Lu } 1558c0ce8fefSTejun Heo 1559a571d4ebSDennis Chen return max_addr; 1560a571d4ebSDennis Chen } 1561a571d4ebSDennis Chen 1562a571d4ebSDennis Chen void __init memblock_enforce_memory_limit(phys_addr_t limit) 1563a571d4ebSDennis Chen { 15641c4bc43dSStefan Agner phys_addr_t max_addr = PHYS_ADDR_MAX; 1565a571d4ebSDennis Chen 1566a571d4ebSDennis Chen if (!limit) 1567a571d4ebSDennis Chen return; 1568a571d4ebSDennis Chen 1569a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1570a571d4ebSDennis Chen 1571a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 15721c4bc43dSStefan Agner if (max_addr == PHYS_ADDR_MAX) 1573a571d4ebSDennis Chen return; 1574a571d4ebSDennis Chen 1575c0ce8fefSTejun Heo /* truncate both memory and reserved regions */ 1576f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.memory, max_addr, 15771c4bc43dSStefan Agner PHYS_ADDR_MAX); 1578f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, max_addr, 15791c4bc43dSStefan Agner PHYS_ADDR_MAX); 158095f72d1eSYinghai Lu } 158195f72d1eSYinghai Lu 1582c9ca9b4eSAKASHI Takahiro void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size) 1583c9ca9b4eSAKASHI Takahiro { 1584c9ca9b4eSAKASHI Takahiro int start_rgn, end_rgn; 1585c9ca9b4eSAKASHI Takahiro int i, ret; 1586c9ca9b4eSAKASHI Takahiro 1587c9ca9b4eSAKASHI Takahiro if (!size) 1588c9ca9b4eSAKASHI Takahiro return; 1589c9ca9b4eSAKASHI Takahiro 1590c9ca9b4eSAKASHI Takahiro ret = memblock_isolate_range(&memblock.memory, base, size, 1591c9ca9b4eSAKASHI Takahiro &start_rgn, &end_rgn); 1592c9ca9b4eSAKASHI Takahiro if (ret) 1593c9ca9b4eSAKASHI Takahiro return; 1594c9ca9b4eSAKASHI Takahiro 1595c9ca9b4eSAKASHI Takahiro /* remove all the MAP regions */ 1596c9ca9b4eSAKASHI Takahiro for (i = memblock.memory.cnt - 1; i >= end_rgn; i--) 1597c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1598c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1599c9ca9b4eSAKASHI Takahiro 1600c9ca9b4eSAKASHI Takahiro for (i = start_rgn - 1; i >= 0; i--) 1601c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1602c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1603c9ca9b4eSAKASHI Takahiro 1604c9ca9b4eSAKASHI Takahiro /* truncate the reserved regions */ 1605c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 0, base); 1606c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 16071c4bc43dSStefan Agner base + size, PHYS_ADDR_MAX); 1608c9ca9b4eSAKASHI Takahiro } 1609c9ca9b4eSAKASHI Takahiro 1610a571d4ebSDennis Chen void __init memblock_mem_limit_remove_map(phys_addr_t limit) 1611a571d4ebSDennis Chen { 1612a571d4ebSDennis Chen phys_addr_t max_addr; 1613a571d4ebSDennis Chen 1614a571d4ebSDennis Chen if (!limit) 1615a571d4ebSDennis Chen return; 1616a571d4ebSDennis Chen 1617a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1618a571d4ebSDennis Chen 1619a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 16201c4bc43dSStefan Agner if (max_addr == PHYS_ADDR_MAX) 1621a571d4ebSDennis Chen return; 1622a571d4ebSDennis Chen 1623c9ca9b4eSAKASHI Takahiro memblock_cap_memory_range(0, max_addr); 1624a571d4ebSDennis Chen } 1625a571d4ebSDennis Chen 1626cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 162772d4b0b4SBenjamin Herrenschmidt { 162872d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 162972d4b0b4SBenjamin Herrenschmidt 163072d4b0b4SBenjamin Herrenschmidt do { 163172d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 163272d4b0b4SBenjamin Herrenschmidt 163372d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 163472d4b0b4SBenjamin Herrenschmidt right = mid; 163572d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 163672d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 163772d4b0b4SBenjamin Herrenschmidt left = mid + 1; 163872d4b0b4SBenjamin Herrenschmidt else 163972d4b0b4SBenjamin Herrenschmidt return mid; 164072d4b0b4SBenjamin Herrenschmidt } while (left < right); 164172d4b0b4SBenjamin Herrenschmidt return -1; 164272d4b0b4SBenjamin Herrenschmidt } 164372d4b0b4SBenjamin Herrenschmidt 1644f5a222dcSYueyi Li bool __init_memblock memblock_is_reserved(phys_addr_t addr) 164595f72d1eSYinghai Lu { 164672d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 164795f72d1eSYinghai Lu } 164872d4b0b4SBenjamin Herrenschmidt 1649b4ad0c7eSYaowei Bai bool __init_memblock memblock_is_memory(phys_addr_t addr) 165072d4b0b4SBenjamin Herrenschmidt { 165172d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 165272d4b0b4SBenjamin Herrenschmidt } 165372d4b0b4SBenjamin Herrenschmidt 1654937f0c26SYaowei Bai bool __init_memblock memblock_is_map_memory(phys_addr_t addr) 1655bf3d3cc5SArd Biesheuvel { 1656bf3d3cc5SArd Biesheuvel int i = memblock_search(&memblock.memory, addr); 1657bf3d3cc5SArd Biesheuvel 1658bf3d3cc5SArd Biesheuvel if (i == -1) 1659bf3d3cc5SArd Biesheuvel return false; 1660bf3d3cc5SArd Biesheuvel return !memblock_is_nomap(&memblock.memory.regions[i]); 1661bf3d3cc5SArd Biesheuvel } 1662bf3d3cc5SArd Biesheuvel 1663e76b63f8SYinghai Lu #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 1664e76b63f8SYinghai Lu int __init_memblock memblock_search_pfn_nid(unsigned long pfn, 1665e76b63f8SYinghai Lu unsigned long *start_pfn, unsigned long *end_pfn) 1666e76b63f8SYinghai Lu { 1667e76b63f8SYinghai Lu struct memblock_type *type = &memblock.memory; 166816763230SFabian Frederick int mid = memblock_search(type, PFN_PHYS(pfn)); 1669e76b63f8SYinghai Lu 1670e76b63f8SYinghai Lu if (mid == -1) 1671e76b63f8SYinghai Lu return -1; 1672e76b63f8SYinghai Lu 1673f7e2f7e8SFabian Frederick *start_pfn = PFN_DOWN(type->regions[mid].base); 1674f7e2f7e8SFabian Frederick *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); 1675e76b63f8SYinghai Lu 1676e76b63f8SYinghai Lu return type->regions[mid].nid; 1677e76b63f8SYinghai Lu } 1678e76b63f8SYinghai Lu #endif 1679e76b63f8SYinghai Lu 1680eab30949SStephen Boyd /** 1681eab30949SStephen Boyd * memblock_is_region_memory - check if a region is a subset of memory 1682eab30949SStephen Boyd * @base: base of region to check 1683eab30949SStephen Boyd * @size: size of region to check 1684eab30949SStephen Boyd * 1685eab30949SStephen Boyd * Check if the region [@base, @base + @size) is a subset of a memory block. 1686eab30949SStephen Boyd * 168747cec443SMike Rapoport * Return: 1688eab30949SStephen Boyd * 0 if false, non-zero if true 1689eab30949SStephen Boyd */ 1690937f0c26SYaowei Bai bool __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 169172d4b0b4SBenjamin Herrenschmidt { 1692abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 1693eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 169472d4b0b4SBenjamin Herrenschmidt 169572d4b0b4SBenjamin Herrenschmidt if (idx == -1) 1696937f0c26SYaowei Bai return false; 1697ef415ef4SWei Yang return (memblock.memory.regions[idx].base + 1698eb18f1b5STejun Heo memblock.memory.regions[idx].size) >= end; 169995f72d1eSYinghai Lu } 170095f72d1eSYinghai Lu 1701eab30949SStephen Boyd /** 1702eab30949SStephen Boyd * memblock_is_region_reserved - check if a region intersects reserved memory 1703eab30949SStephen Boyd * @base: base of region to check 1704eab30949SStephen Boyd * @size: size of region to check 1705eab30949SStephen Boyd * 170647cec443SMike Rapoport * Check if the region [@base, @base + @size) intersects a reserved 170747cec443SMike Rapoport * memory block. 1708eab30949SStephen Boyd * 170947cec443SMike Rapoport * Return: 1710c5c5c9d1STang Chen * True if they intersect, false if not. 1711eab30949SStephen Boyd */ 1712c5c5c9d1STang Chen bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 171395f72d1eSYinghai Lu { 1714eb18f1b5STejun Heo memblock_cap_size(base, &size); 1715c5c5c9d1STang Chen return memblock_overlaps_region(&memblock.reserved, base, size); 171695f72d1eSYinghai Lu } 171795f72d1eSYinghai Lu 17186ede1fd3SYinghai Lu void __init_memblock memblock_trim_memory(phys_addr_t align) 17196ede1fd3SYinghai Lu { 17206ede1fd3SYinghai Lu phys_addr_t start, end, orig_start, orig_end; 1721136199f0SEmil Medve struct memblock_region *r; 17226ede1fd3SYinghai Lu 1723136199f0SEmil Medve for_each_memblock(memory, r) { 1724136199f0SEmil Medve orig_start = r->base; 1725136199f0SEmil Medve orig_end = r->base + r->size; 17266ede1fd3SYinghai Lu start = round_up(orig_start, align); 17276ede1fd3SYinghai Lu end = round_down(orig_end, align); 17286ede1fd3SYinghai Lu 17296ede1fd3SYinghai Lu if (start == orig_start && end == orig_end) 17306ede1fd3SYinghai Lu continue; 17316ede1fd3SYinghai Lu 17326ede1fd3SYinghai Lu if (start < end) { 1733136199f0SEmil Medve r->base = start; 1734136199f0SEmil Medve r->size = end - start; 17356ede1fd3SYinghai Lu } else { 1736136199f0SEmil Medve memblock_remove_region(&memblock.memory, 1737136199f0SEmil Medve r - memblock.memory.regions); 1738136199f0SEmil Medve r--; 17396ede1fd3SYinghai Lu } 17406ede1fd3SYinghai Lu } 17416ede1fd3SYinghai Lu } 1742e63075a3SBenjamin Herrenschmidt 17433661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 1744e63075a3SBenjamin Herrenschmidt { 1745e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 1746e63075a3SBenjamin Herrenschmidt } 1747e63075a3SBenjamin Herrenschmidt 1748fec51014SLaura Abbott phys_addr_t __init_memblock memblock_get_current_limit(void) 1749fec51014SLaura Abbott { 1750fec51014SLaura Abbott return memblock.current_limit; 1751fec51014SLaura Abbott } 1752fec51014SLaura Abbott 17530262d9c8SHeiko Carstens static void __init_memblock memblock_dump(struct memblock_type *type) 17546ed311b2SBenjamin Herrenschmidt { 17555d63f81cSMiles Chen phys_addr_t base, end, size; 1756e1720feeSMike Rapoport enum memblock_flags flags; 17578c9c1701SAlexander Kuleshov int idx; 17588c9c1701SAlexander Kuleshov struct memblock_region *rgn; 17596ed311b2SBenjamin Herrenschmidt 17600262d9c8SHeiko Carstens pr_info(" %s.cnt = 0x%lx\n", type->name, type->cnt); 17616ed311b2SBenjamin Herrenschmidt 176266e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 17637c0caeb8STejun Heo char nid_buf[32] = ""; 17646ed311b2SBenjamin Herrenschmidt 17657c0caeb8STejun Heo base = rgn->base; 17667c0caeb8STejun Heo size = rgn->size; 17675d63f81cSMiles Chen end = base + size - 1; 176866a20757STang Chen flags = rgn->flags; 17697c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 17707c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 17717c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 17727c0caeb8STejun Heo memblock_get_region_node(rgn)); 17737c0caeb8STejun Heo #endif 1774e1720feeSMike Rapoport pr_info(" %s[%#x]\t[%pa-%pa], %pa bytes%s flags: %#x\n", 17750262d9c8SHeiko Carstens type->name, idx, &base, &end, &size, nid_buf, flags); 17766ed311b2SBenjamin Herrenschmidt } 17776ed311b2SBenjamin Herrenschmidt } 17786ed311b2SBenjamin Herrenschmidt 17794ff7b82fSTejun Heo void __init_memblock __memblock_dump_all(void) 17806ed311b2SBenjamin Herrenschmidt { 17816ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 17825d63f81cSMiles Chen pr_info(" memory size = %pa reserved size = %pa\n", 17835d63f81cSMiles Chen &memblock.memory.total_size, 17845d63f81cSMiles Chen &memblock.reserved.total_size); 17856ed311b2SBenjamin Herrenschmidt 17860262d9c8SHeiko Carstens memblock_dump(&memblock.memory); 17870262d9c8SHeiko Carstens memblock_dump(&memblock.reserved); 1788409efd4cSHeiko Carstens #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 17890262d9c8SHeiko Carstens memblock_dump(&memblock.physmem); 1790409efd4cSHeiko Carstens #endif 17916ed311b2SBenjamin Herrenschmidt } 17926ed311b2SBenjamin Herrenschmidt 17931aadc056STejun Heo void __init memblock_allow_resize(void) 17946ed311b2SBenjamin Herrenschmidt { 1795142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 17966ed311b2SBenjamin Herrenschmidt } 17976ed311b2SBenjamin Herrenschmidt 17986ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 17996ed311b2SBenjamin Herrenschmidt { 18006ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 18016ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 18026ed311b2SBenjamin Herrenschmidt return 0; 18036ed311b2SBenjamin Herrenschmidt } 18046ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 18056ed311b2SBenjamin Herrenschmidt 1806bda49a81SMike Rapoport static void __init __free_pages_memory(unsigned long start, unsigned long end) 1807bda49a81SMike Rapoport { 1808bda49a81SMike Rapoport int order; 1809bda49a81SMike Rapoport 1810bda49a81SMike Rapoport while (start < end) { 1811bda49a81SMike Rapoport order = min(MAX_ORDER - 1UL, __ffs(start)); 1812bda49a81SMike Rapoport 1813bda49a81SMike Rapoport while (start + (1UL << order) > end) 1814bda49a81SMike Rapoport order--; 1815bda49a81SMike Rapoport 1816bda49a81SMike Rapoport memblock_free_pages(pfn_to_page(start), start, order); 1817bda49a81SMike Rapoport 1818bda49a81SMike Rapoport start += (1UL << order); 1819bda49a81SMike Rapoport } 1820bda49a81SMike Rapoport } 1821bda49a81SMike Rapoport 1822bda49a81SMike Rapoport static unsigned long __init __free_memory_core(phys_addr_t start, 1823bda49a81SMike Rapoport phys_addr_t end) 1824bda49a81SMike Rapoport { 1825bda49a81SMike Rapoport unsigned long start_pfn = PFN_UP(start); 1826bda49a81SMike Rapoport unsigned long end_pfn = min_t(unsigned long, 1827bda49a81SMike Rapoport PFN_DOWN(end), max_low_pfn); 1828bda49a81SMike Rapoport 1829bda49a81SMike Rapoport if (start_pfn >= end_pfn) 1830bda49a81SMike Rapoport return 0; 1831bda49a81SMike Rapoport 1832bda49a81SMike Rapoport __free_pages_memory(start_pfn, end_pfn); 1833bda49a81SMike Rapoport 1834bda49a81SMike Rapoport return end_pfn - start_pfn; 1835bda49a81SMike Rapoport } 1836bda49a81SMike Rapoport 1837bda49a81SMike Rapoport static unsigned long __init free_low_memory_core_early(void) 1838bda49a81SMike Rapoport { 1839bda49a81SMike Rapoport unsigned long count = 0; 1840bda49a81SMike Rapoport phys_addr_t start, end; 1841bda49a81SMike Rapoport u64 i; 1842bda49a81SMike Rapoport 1843bda49a81SMike Rapoport memblock_clear_hotplug(0, -1); 1844bda49a81SMike Rapoport 1845bda49a81SMike Rapoport for_each_reserved_mem_region(i, &start, &end) 1846bda49a81SMike Rapoport reserve_bootmem_region(start, end); 1847bda49a81SMike Rapoport 1848bda49a81SMike Rapoport /* 1849bda49a81SMike Rapoport * We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id 1850bda49a81SMike Rapoport * because in some case like Node0 doesn't have RAM installed 1851bda49a81SMike Rapoport * low ram will be on Node1 1852bda49a81SMike Rapoport */ 1853bda49a81SMike Rapoport for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, 1854bda49a81SMike Rapoport NULL) 1855bda49a81SMike Rapoport count += __free_memory_core(start, end); 1856bda49a81SMike Rapoport 1857bda49a81SMike Rapoport return count; 1858bda49a81SMike Rapoport } 1859bda49a81SMike Rapoport 1860bda49a81SMike Rapoport static int reset_managed_pages_done __initdata; 1861bda49a81SMike Rapoport 1862bda49a81SMike Rapoport void reset_node_managed_pages(pg_data_t *pgdat) 1863bda49a81SMike Rapoport { 1864bda49a81SMike Rapoport struct zone *z; 1865bda49a81SMike Rapoport 1866bda49a81SMike Rapoport for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++) 18679705bea5SArun KS atomic_long_set(&z->managed_pages, 0); 1868bda49a81SMike Rapoport } 1869bda49a81SMike Rapoport 1870bda49a81SMike Rapoport void __init reset_all_zones_managed_pages(void) 1871bda49a81SMike Rapoport { 1872bda49a81SMike Rapoport struct pglist_data *pgdat; 1873bda49a81SMike Rapoport 1874bda49a81SMike Rapoport if (reset_managed_pages_done) 1875bda49a81SMike Rapoport return; 1876bda49a81SMike Rapoport 1877bda49a81SMike Rapoport for_each_online_pgdat(pgdat) 1878bda49a81SMike Rapoport reset_node_managed_pages(pgdat); 1879bda49a81SMike Rapoport 1880bda49a81SMike Rapoport reset_managed_pages_done = 1; 1881bda49a81SMike Rapoport } 1882bda49a81SMike Rapoport 1883bda49a81SMike Rapoport /** 1884bda49a81SMike Rapoport * memblock_free_all - release free pages to the buddy allocator 1885bda49a81SMike Rapoport * 1886bda49a81SMike Rapoport * Return: the number of pages actually released. 1887bda49a81SMike Rapoport */ 1888bda49a81SMike Rapoport unsigned long __init memblock_free_all(void) 1889bda49a81SMike Rapoport { 1890bda49a81SMike Rapoport unsigned long pages; 1891bda49a81SMike Rapoport 1892bda49a81SMike Rapoport reset_all_zones_managed_pages(); 1893bda49a81SMike Rapoport 1894bda49a81SMike Rapoport pages = free_low_memory_core_early(); 1895ca79b0c2SArun KS totalram_pages_add(pages); 1896bda49a81SMike Rapoport 1897bda49a81SMike Rapoport return pages; 1898bda49a81SMike Rapoport } 1899bda49a81SMike Rapoport 1900c378ddd5STejun Heo #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) 19016d03b885SBenjamin Herrenschmidt 19026d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 19036d03b885SBenjamin Herrenschmidt { 19046d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 19056d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 19066d03b885SBenjamin Herrenschmidt int i; 19075d63f81cSMiles Chen phys_addr_t end; 19086d03b885SBenjamin Herrenschmidt 19096d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 19106d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 19115d63f81cSMiles Chen end = reg->base + reg->size - 1; 19126d03b885SBenjamin Herrenschmidt 19135d63f81cSMiles Chen seq_printf(m, "%4d: ", i); 19145d63f81cSMiles Chen seq_printf(m, "%pa..%pa\n", ®->base, &end); 19156d03b885SBenjamin Herrenschmidt } 19166d03b885SBenjamin Herrenschmidt return 0; 19176d03b885SBenjamin Herrenschmidt } 19185ad35093SAndy Shevchenko DEFINE_SHOW_ATTRIBUTE(memblock_debug); 19196d03b885SBenjamin Herrenschmidt 19206d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 19216d03b885SBenjamin Herrenschmidt { 19226d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 1923d9f7979cSGreg Kroah-Hartman 19240825a6f9SJoe Perches debugfs_create_file("memory", 0444, root, 19250825a6f9SJoe Perches &memblock.memory, &memblock_debug_fops); 19260825a6f9SJoe Perches debugfs_create_file("reserved", 0444, root, 19270825a6f9SJoe Perches &memblock.reserved, &memblock_debug_fops); 192870210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 19290825a6f9SJoe Perches debugfs_create_file("physmem", 0444, root, 19300825a6f9SJoe Perches &memblock.physmem, &memblock_debug_fops); 193170210ed9SPhilipp Hachtmann #endif 19326d03b885SBenjamin Herrenschmidt 19336d03b885SBenjamin Herrenschmidt return 0; 19346d03b885SBenjamin Herrenschmidt } 19356d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 19366d03b885SBenjamin Herrenschmidt 19376d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 1938