195f72d1eSYinghai Lu /* 295f72d1eSYinghai Lu * Procedures for maintaining information about logical memory blocks. 395f72d1eSYinghai Lu * 495f72d1eSYinghai Lu * Peter Bergner, IBM Corp. June 2001. 595f72d1eSYinghai Lu * Copyright (C) 2001 Peter Bergner. 695f72d1eSYinghai Lu * 795f72d1eSYinghai Lu * This program is free software; you can redistribute it and/or 895f72d1eSYinghai Lu * modify it under the terms of the GNU General Public License 995f72d1eSYinghai Lu * as published by the Free Software Foundation; either version 1095f72d1eSYinghai Lu * 2 of the License, or (at your option) any later version. 1195f72d1eSYinghai Lu */ 1295f72d1eSYinghai Lu 1395f72d1eSYinghai Lu #include <linux/kernel.h> 14142b45a7SBenjamin Herrenschmidt #include <linux/slab.h> 1595f72d1eSYinghai Lu #include <linux/init.h> 1695f72d1eSYinghai Lu #include <linux/bitops.h> 17449e8df3SBenjamin Herrenschmidt #include <linux/poison.h> 18c196f76fSBenjamin Herrenschmidt #include <linux/pfn.h> 196d03b885SBenjamin Herrenschmidt #include <linux/debugfs.h> 206d03b885SBenjamin Herrenschmidt #include <linux/seq_file.h> 2195f72d1eSYinghai Lu #include <linux/memblock.h> 2295f72d1eSYinghai Lu 23c4c5ad6bSChristoph Hellwig #include <asm/sections.h> 2426f09e9bSSantosh Shilimkar #include <linux/io.h> 2526f09e9bSSantosh Shilimkar 2626f09e9bSSantosh Shilimkar #include "internal.h" 2779442ed1STang Chen 28fe091c20STejun Heo static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; 29fe091c20STejun Heo static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; 3070210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 3170210ed9SPhilipp Hachtmann static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS] __initdata_memblock; 3270210ed9SPhilipp Hachtmann #endif 33fe091c20STejun Heo 34fe091c20STejun Heo struct memblock memblock __initdata_memblock = { 35fe091c20STejun Heo .memory.regions = memblock_memory_init_regions, 36fe091c20STejun Heo .memory.cnt = 1, /* empty dummy entry */ 37fe091c20STejun Heo .memory.max = INIT_MEMBLOCK_REGIONS, 380262d9c8SHeiko Carstens .memory.name = "memory", 39fe091c20STejun Heo 40fe091c20STejun Heo .reserved.regions = memblock_reserved_init_regions, 41fe091c20STejun Heo .reserved.cnt = 1, /* empty dummy entry */ 42fe091c20STejun Heo .reserved.max = INIT_MEMBLOCK_REGIONS, 430262d9c8SHeiko Carstens .reserved.name = "reserved", 44fe091c20STejun Heo 4570210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 4670210ed9SPhilipp Hachtmann .physmem.regions = memblock_physmem_init_regions, 4770210ed9SPhilipp Hachtmann .physmem.cnt = 1, /* empty dummy entry */ 4870210ed9SPhilipp Hachtmann .physmem.max = INIT_PHYSMEM_REGIONS, 490262d9c8SHeiko Carstens .physmem.name = "physmem", 5070210ed9SPhilipp Hachtmann #endif 5170210ed9SPhilipp Hachtmann 5279442ed1STang Chen .bottom_up = false, 53fe091c20STejun Heo .current_limit = MEMBLOCK_ALLOC_ANYWHERE, 54fe091c20STejun Heo }; 5595f72d1eSYinghai Lu 5610d06439SYinghai Lu int memblock_debug __initdata_memblock; 5755ac590cSTang Chen #ifdef CONFIG_MOVABLE_NODE 5855ac590cSTang Chen bool movable_node_enabled __initdata_memblock = false; 5955ac590cSTang Chen #endif 60a3f5bafcSTony Luck static bool system_has_some_mirror __initdata_memblock = false; 611aadc056STejun Heo static int memblock_can_resize __initdata_memblock; 62181eb394SGavin Shan static int memblock_memory_in_slab __initdata_memblock = 0; 63181eb394SGavin Shan static int memblock_reserved_in_slab __initdata_memblock = 0; 6495f72d1eSYinghai Lu 65a3f5bafcSTony Luck ulong __init_memblock choose_memblock_flags(void) 66a3f5bafcSTony Luck { 67a3f5bafcSTony Luck return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; 68a3f5bafcSTony Luck } 69a3f5bafcSTony Luck 70eb18f1b5STejun Heo /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ 71eb18f1b5STejun Heo static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) 72eb18f1b5STejun Heo { 73eb18f1b5STejun Heo return *size = min(*size, (phys_addr_t)ULLONG_MAX - base); 74eb18f1b5STejun Heo } 75eb18f1b5STejun Heo 766ed311b2SBenjamin Herrenschmidt /* 776ed311b2SBenjamin Herrenschmidt * Address comparison utilities 786ed311b2SBenjamin Herrenschmidt */ 7910d06439SYinghai Lu static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, 802898cc4cSBenjamin Herrenschmidt phys_addr_t base2, phys_addr_t size2) 8195f72d1eSYinghai Lu { 8295f72d1eSYinghai Lu return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); 8395f72d1eSYinghai Lu } 8495f72d1eSYinghai Lu 8595cf82ecSTang Chen bool __init_memblock memblock_overlaps_region(struct memblock_type *type, 862d7d3eb2SH Hartley Sweeten phys_addr_t base, phys_addr_t size) 876ed311b2SBenjamin Herrenschmidt { 886ed311b2SBenjamin Herrenschmidt unsigned long i; 896ed311b2SBenjamin Herrenschmidt 90f14516fbSAlexander Kuleshov for (i = 0; i < type->cnt; i++) 91f14516fbSAlexander Kuleshov if (memblock_addrs_overlap(base, size, type->regions[i].base, 92f14516fbSAlexander Kuleshov type->regions[i].size)) 936ed311b2SBenjamin Herrenschmidt break; 94c5c5c9d1STang Chen return i < type->cnt; 956ed311b2SBenjamin Herrenschmidt } 966ed311b2SBenjamin Herrenschmidt 9779442ed1STang Chen /* 9879442ed1STang Chen * __memblock_find_range_bottom_up - find free area utility in bottom-up 9979442ed1STang Chen * @start: start of candidate range 10079442ed1STang Chen * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 10179442ed1STang Chen * @size: size of free area to find 10279442ed1STang Chen * @align: alignment of free area to find 103b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 104fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 10579442ed1STang Chen * 10679442ed1STang Chen * Utility called from memblock_find_in_range_node(), find free area bottom-up. 10779442ed1STang Chen * 10879442ed1STang Chen * RETURNS: 10979442ed1STang Chen * Found address on success, 0 on failure. 11079442ed1STang Chen */ 11179442ed1STang Chen static phys_addr_t __init_memblock 11279442ed1STang Chen __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, 113fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 114fc6daaf9STony Luck ulong flags) 11579442ed1STang Chen { 11679442ed1STang Chen phys_addr_t this_start, this_end, cand; 11779442ed1STang Chen u64 i; 11879442ed1STang Chen 119fc6daaf9STony Luck for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { 12079442ed1STang Chen this_start = clamp(this_start, start, end); 12179442ed1STang Chen this_end = clamp(this_end, start, end); 12279442ed1STang Chen 12379442ed1STang Chen cand = round_up(this_start, align); 12479442ed1STang Chen if (cand < this_end && this_end - cand >= size) 12579442ed1STang Chen return cand; 12679442ed1STang Chen } 12779442ed1STang Chen 12879442ed1STang Chen return 0; 12979442ed1STang Chen } 13079442ed1STang Chen 1317bd0b0f0STejun Heo /** 1321402899eSTang Chen * __memblock_find_range_top_down - find free area utility, in top-down 1331402899eSTang Chen * @start: start of candidate range 1341402899eSTang Chen * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 1351402899eSTang Chen * @size: size of free area to find 1361402899eSTang Chen * @align: alignment of free area to find 137b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 138fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1391402899eSTang Chen * 1401402899eSTang Chen * Utility called from memblock_find_in_range_node(), find free area top-down. 1411402899eSTang Chen * 1421402899eSTang Chen * RETURNS: 14379442ed1STang Chen * Found address on success, 0 on failure. 1441402899eSTang Chen */ 1451402899eSTang Chen static phys_addr_t __init_memblock 1461402899eSTang Chen __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, 147fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 148fc6daaf9STony Luck ulong flags) 1491402899eSTang Chen { 1501402899eSTang Chen phys_addr_t this_start, this_end, cand; 1511402899eSTang Chen u64 i; 1521402899eSTang Chen 153fc6daaf9STony Luck for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, 154fc6daaf9STony Luck NULL) { 1551402899eSTang Chen this_start = clamp(this_start, start, end); 1561402899eSTang Chen this_end = clamp(this_end, start, end); 1571402899eSTang Chen 1581402899eSTang Chen if (this_end < size) 1591402899eSTang Chen continue; 1601402899eSTang Chen 1611402899eSTang Chen cand = round_down(this_end - size, align); 1621402899eSTang Chen if (cand >= this_start) 1631402899eSTang Chen return cand; 1641402899eSTang Chen } 1651402899eSTang Chen 1661402899eSTang Chen return 0; 1671402899eSTang Chen } 1681402899eSTang Chen 1691402899eSTang Chen /** 1707bd0b0f0STejun Heo * memblock_find_in_range_node - find free area in given range and node 1717bd0b0f0STejun Heo * @size: size of free area to find 1727bd0b0f0STejun Heo * @align: alignment of free area to find 17387029ee9SGrygorii Strashko * @start: start of candidate range 17487029ee9SGrygorii Strashko * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 175b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 176fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1777bd0b0f0STejun Heo * 1787bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range and node. 1797bd0b0f0STejun Heo * 18079442ed1STang Chen * When allocation direction is bottom-up, the @start should be greater 18179442ed1STang Chen * than the end of the kernel image. Otherwise, it will be trimmed. The 18279442ed1STang Chen * reason is that we want the bottom-up allocation just near the kernel 18379442ed1STang Chen * image so it is highly likely that the allocated memory and the kernel 18479442ed1STang Chen * will reside in the same node. 18579442ed1STang Chen * 18679442ed1STang Chen * If bottom-up allocation failed, will try to allocate memory top-down. 18779442ed1STang Chen * 1887bd0b0f0STejun Heo * RETURNS: 18979442ed1STang Chen * Found address on success, 0 on failure. 1906ed311b2SBenjamin Herrenschmidt */ 19187029ee9SGrygorii Strashko phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, 19287029ee9SGrygorii Strashko phys_addr_t align, phys_addr_t start, 193fc6daaf9STony Luck phys_addr_t end, int nid, ulong flags) 194f7210e6cSTang Chen { 1950cfb8f0cSTang Chen phys_addr_t kernel_end, ret; 19679442ed1STang Chen 197f7210e6cSTang Chen /* pump up @end */ 198f7210e6cSTang Chen if (end == MEMBLOCK_ALLOC_ACCESSIBLE) 199f7210e6cSTang Chen end = memblock.current_limit; 200f7210e6cSTang Chen 201f7210e6cSTang Chen /* avoid allocating the first page */ 202f7210e6cSTang Chen start = max_t(phys_addr_t, start, PAGE_SIZE); 203f7210e6cSTang Chen end = max(start, end); 20479442ed1STang Chen kernel_end = __pa_symbol(_end); 20579442ed1STang Chen 20679442ed1STang Chen /* 20779442ed1STang Chen * try bottom-up allocation only when bottom-up mode 20879442ed1STang Chen * is set and @end is above the kernel image. 20979442ed1STang Chen */ 21079442ed1STang Chen if (memblock_bottom_up() && end > kernel_end) { 21179442ed1STang Chen phys_addr_t bottom_up_start; 21279442ed1STang Chen 21379442ed1STang Chen /* make sure we will allocate above the kernel */ 21479442ed1STang Chen bottom_up_start = max(start, kernel_end); 21579442ed1STang Chen 21679442ed1STang Chen /* ok, try bottom-up allocation first */ 21779442ed1STang Chen ret = __memblock_find_range_bottom_up(bottom_up_start, end, 218fc6daaf9STony Luck size, align, nid, flags); 21979442ed1STang Chen if (ret) 22079442ed1STang Chen return ret; 22179442ed1STang Chen 22279442ed1STang Chen /* 22379442ed1STang Chen * we always limit bottom-up allocation above the kernel, 22479442ed1STang Chen * but top-down allocation doesn't have the limit, so 22579442ed1STang Chen * retrying top-down allocation may succeed when bottom-up 22679442ed1STang Chen * allocation failed. 22779442ed1STang Chen * 22879442ed1STang Chen * bottom-up allocation is expected to be fail very rarely, 22979442ed1STang Chen * so we use WARN_ONCE() here to see the stack trace if 23079442ed1STang Chen * fail happens. 23179442ed1STang Chen */ 232756a025fSJoe Perches WARN_ONCE(1, "memblock: bottom-up allocation failed, memory hotunplug may be affected\n"); 23379442ed1STang Chen } 234f7210e6cSTang Chen 235fc6daaf9STony Luck return __memblock_find_range_top_down(start, end, size, align, nid, 236fc6daaf9STony Luck flags); 237f7210e6cSTang Chen } 2386ed311b2SBenjamin Herrenschmidt 2397bd0b0f0STejun Heo /** 2407bd0b0f0STejun Heo * memblock_find_in_range - find free area in given range 2417bd0b0f0STejun Heo * @start: start of candidate range 2427bd0b0f0STejun Heo * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 2437bd0b0f0STejun Heo * @size: size of free area to find 2447bd0b0f0STejun Heo * @align: alignment of free area to find 2457bd0b0f0STejun Heo * 2467bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range. 2477bd0b0f0STejun Heo * 2487bd0b0f0STejun Heo * RETURNS: 24979442ed1STang Chen * Found address on success, 0 on failure. 2507bd0b0f0STejun Heo */ 2517bd0b0f0STejun Heo phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, 2527bd0b0f0STejun Heo phys_addr_t end, phys_addr_t size, 2537bd0b0f0STejun Heo phys_addr_t align) 2547bd0b0f0STejun Heo { 255a3f5bafcSTony Luck phys_addr_t ret; 256a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 257a3f5bafcSTony Luck 258a3f5bafcSTony Luck again: 259a3f5bafcSTony Luck ret = memblock_find_in_range_node(size, align, start, end, 260a3f5bafcSTony Luck NUMA_NO_NODE, flags); 261a3f5bafcSTony Luck 262a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 263a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 264a3f5bafcSTony Luck &size); 265a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 266a3f5bafcSTony Luck goto again; 267a3f5bafcSTony Luck } 268a3f5bafcSTony Luck 269a3f5bafcSTony Luck return ret; 2707bd0b0f0STejun Heo } 2717bd0b0f0STejun Heo 27210d06439SYinghai Lu static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) 27395f72d1eSYinghai Lu { 2741440c4e2STejun Heo type->total_size -= type->regions[r].size; 2757c0caeb8STejun Heo memmove(&type->regions[r], &type->regions[r + 1], 2767c0caeb8STejun Heo (type->cnt - (r + 1)) * sizeof(type->regions[r])); 277e3239ff9SBenjamin Herrenschmidt type->cnt--; 27895f72d1eSYinghai Lu 2798f7a6605SBenjamin Herrenschmidt /* Special case for empty arrays */ 2808f7a6605SBenjamin Herrenschmidt if (type->cnt == 0) { 2811440c4e2STejun Heo WARN_ON(type->total_size != 0); 2828f7a6605SBenjamin Herrenschmidt type->cnt = 1; 2838f7a6605SBenjamin Herrenschmidt type->regions[0].base = 0; 2848f7a6605SBenjamin Herrenschmidt type->regions[0].size = 0; 28566a20757STang Chen type->regions[0].flags = 0; 2867c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 2878f7a6605SBenjamin Herrenschmidt } 28895f72d1eSYinghai Lu } 28995f72d1eSYinghai Lu 290354f17e1SPhilipp Hachtmann #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK 291354f17e1SPhilipp Hachtmann 29229f67386SYinghai Lu phys_addr_t __init_memblock get_allocated_memblock_reserved_regions_info( 29329f67386SYinghai Lu phys_addr_t *addr) 29429f67386SYinghai Lu { 29529f67386SYinghai Lu if (memblock.reserved.regions == memblock_reserved_init_regions) 29629f67386SYinghai Lu return 0; 29729f67386SYinghai Lu 29829f67386SYinghai Lu *addr = __pa(memblock.reserved.regions); 29929f67386SYinghai Lu 30029f67386SYinghai Lu return PAGE_ALIGN(sizeof(struct memblock_region) * 30129f67386SYinghai Lu memblock.reserved.max); 30229f67386SYinghai Lu } 30329f67386SYinghai Lu 3045e270e25SPhilipp Hachtmann phys_addr_t __init_memblock get_allocated_memblock_memory_regions_info( 3055e270e25SPhilipp Hachtmann phys_addr_t *addr) 3065e270e25SPhilipp Hachtmann { 3075e270e25SPhilipp Hachtmann if (memblock.memory.regions == memblock_memory_init_regions) 3085e270e25SPhilipp Hachtmann return 0; 3095e270e25SPhilipp Hachtmann 3105e270e25SPhilipp Hachtmann *addr = __pa(memblock.memory.regions); 3115e270e25SPhilipp Hachtmann 3125e270e25SPhilipp Hachtmann return PAGE_ALIGN(sizeof(struct memblock_region) * 3135e270e25SPhilipp Hachtmann memblock.memory.max); 3145e270e25SPhilipp Hachtmann } 3155e270e25SPhilipp Hachtmann 3165e270e25SPhilipp Hachtmann #endif 3175e270e25SPhilipp Hachtmann 31848c3b583SGreg Pearson /** 31948c3b583SGreg Pearson * memblock_double_array - double the size of the memblock regions array 32048c3b583SGreg Pearson * @type: memblock type of the regions array being doubled 32148c3b583SGreg Pearson * @new_area_start: starting address of memory range to avoid overlap with 32248c3b583SGreg Pearson * @new_area_size: size of memory range to avoid overlap with 32348c3b583SGreg Pearson * 32448c3b583SGreg Pearson * Double the size of the @type regions array. If memblock is being used to 32548c3b583SGreg Pearson * allocate memory for a new reserved regions array and there is a previously 32648c3b583SGreg Pearson * allocated memory range [@new_area_start,@new_area_start+@new_area_size] 32748c3b583SGreg Pearson * waiting to be reserved, ensure the memory used by the new array does 32848c3b583SGreg Pearson * not overlap. 32948c3b583SGreg Pearson * 33048c3b583SGreg Pearson * RETURNS: 33148c3b583SGreg Pearson * 0 on success, -1 on failure. 33248c3b583SGreg Pearson */ 33348c3b583SGreg Pearson static int __init_memblock memblock_double_array(struct memblock_type *type, 33448c3b583SGreg Pearson phys_addr_t new_area_start, 33548c3b583SGreg Pearson phys_addr_t new_area_size) 336142b45a7SBenjamin Herrenschmidt { 337142b45a7SBenjamin Herrenschmidt struct memblock_region *new_array, *old_array; 33829f67386SYinghai Lu phys_addr_t old_alloc_size, new_alloc_size; 339142b45a7SBenjamin Herrenschmidt phys_addr_t old_size, new_size, addr; 340142b45a7SBenjamin Herrenschmidt int use_slab = slab_is_available(); 341181eb394SGavin Shan int *in_slab; 342142b45a7SBenjamin Herrenschmidt 343142b45a7SBenjamin Herrenschmidt /* We don't allow resizing until we know about the reserved regions 344142b45a7SBenjamin Herrenschmidt * of memory that aren't suitable for allocation 345142b45a7SBenjamin Herrenschmidt */ 346142b45a7SBenjamin Herrenschmidt if (!memblock_can_resize) 347142b45a7SBenjamin Herrenschmidt return -1; 348142b45a7SBenjamin Herrenschmidt 349142b45a7SBenjamin Herrenschmidt /* Calculate new doubled size */ 350142b45a7SBenjamin Herrenschmidt old_size = type->max * sizeof(struct memblock_region); 351142b45a7SBenjamin Herrenschmidt new_size = old_size << 1; 35229f67386SYinghai Lu /* 35329f67386SYinghai Lu * We need to allocated new one align to PAGE_SIZE, 35429f67386SYinghai Lu * so we can free them completely later. 35529f67386SYinghai Lu */ 35629f67386SYinghai Lu old_alloc_size = PAGE_ALIGN(old_size); 35729f67386SYinghai Lu new_alloc_size = PAGE_ALIGN(new_size); 358142b45a7SBenjamin Herrenschmidt 359181eb394SGavin Shan /* Retrieve the slab flag */ 360181eb394SGavin Shan if (type == &memblock.memory) 361181eb394SGavin Shan in_slab = &memblock_memory_in_slab; 362181eb394SGavin Shan else 363181eb394SGavin Shan in_slab = &memblock_reserved_in_slab; 364181eb394SGavin Shan 365142b45a7SBenjamin Herrenschmidt /* Try to find some space for it. 366142b45a7SBenjamin Herrenschmidt * 367142b45a7SBenjamin Herrenschmidt * WARNING: We assume that either slab_is_available() and we use it or 368fd07383bSAndrew Morton * we use MEMBLOCK for allocations. That means that this is unsafe to 369fd07383bSAndrew Morton * use when bootmem is currently active (unless bootmem itself is 370fd07383bSAndrew Morton * implemented on top of MEMBLOCK which isn't the case yet) 371142b45a7SBenjamin Herrenschmidt * 372142b45a7SBenjamin Herrenschmidt * This should however not be an issue for now, as we currently only 373fd07383bSAndrew Morton * call into MEMBLOCK while it's still active, or much later when slab 374fd07383bSAndrew Morton * is active for memory hotplug operations 375142b45a7SBenjamin Herrenschmidt */ 376142b45a7SBenjamin Herrenschmidt if (use_slab) { 377142b45a7SBenjamin Herrenschmidt new_array = kmalloc(new_size, GFP_KERNEL); 3781f5026a7STejun Heo addr = new_array ? __pa(new_array) : 0; 3794e2f0775SGavin Shan } else { 38048c3b583SGreg Pearson /* only exclude range when trying to double reserved.regions */ 38148c3b583SGreg Pearson if (type != &memblock.reserved) 38248c3b583SGreg Pearson new_area_start = new_area_size = 0; 38348c3b583SGreg Pearson 38448c3b583SGreg Pearson addr = memblock_find_in_range(new_area_start + new_area_size, 38548c3b583SGreg Pearson memblock.current_limit, 38629f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 38748c3b583SGreg Pearson if (!addr && new_area_size) 38848c3b583SGreg Pearson addr = memblock_find_in_range(0, 38948c3b583SGreg Pearson min(new_area_start, memblock.current_limit), 39029f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 39148c3b583SGreg Pearson 39215674868SSachin Kamat new_array = addr ? __va(addr) : NULL; 3934e2f0775SGavin Shan } 3941f5026a7STejun Heo if (!addr) { 395142b45a7SBenjamin Herrenschmidt pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", 3960262d9c8SHeiko Carstens type->name, type->max, type->max * 2); 397142b45a7SBenjamin Herrenschmidt return -1; 398142b45a7SBenjamin Herrenschmidt } 399142b45a7SBenjamin Herrenschmidt 400fd07383bSAndrew Morton memblock_dbg("memblock: %s is doubled to %ld at [%#010llx-%#010llx]", 4010262d9c8SHeiko Carstens type->name, type->max * 2, (u64)addr, 402fd07383bSAndrew Morton (u64)addr + new_size - 1); 403ea9e4376SYinghai Lu 404fd07383bSAndrew Morton /* 405fd07383bSAndrew Morton * Found space, we now need to move the array over before we add the 406fd07383bSAndrew Morton * reserved region since it may be our reserved array itself that is 407fd07383bSAndrew Morton * full. 408142b45a7SBenjamin Herrenschmidt */ 409142b45a7SBenjamin Herrenschmidt memcpy(new_array, type->regions, old_size); 410142b45a7SBenjamin Herrenschmidt memset(new_array + type->max, 0, old_size); 411142b45a7SBenjamin Herrenschmidt old_array = type->regions; 412142b45a7SBenjamin Herrenschmidt type->regions = new_array; 413142b45a7SBenjamin Herrenschmidt type->max <<= 1; 414142b45a7SBenjamin Herrenschmidt 415fd07383bSAndrew Morton /* Free old array. We needn't free it if the array is the static one */ 416181eb394SGavin Shan if (*in_slab) 417181eb394SGavin Shan kfree(old_array); 418181eb394SGavin Shan else if (old_array != memblock_memory_init_regions && 419142b45a7SBenjamin Herrenschmidt old_array != memblock_reserved_init_regions) 42029f67386SYinghai Lu memblock_free(__pa(old_array), old_alloc_size); 421142b45a7SBenjamin Herrenschmidt 422fd07383bSAndrew Morton /* 423fd07383bSAndrew Morton * Reserve the new array if that comes from the memblock. Otherwise, we 424fd07383bSAndrew Morton * needn't do it 425181eb394SGavin Shan */ 426181eb394SGavin Shan if (!use_slab) 42729f67386SYinghai Lu BUG_ON(memblock_reserve(addr, new_alloc_size)); 428181eb394SGavin Shan 429181eb394SGavin Shan /* Update slab flag */ 430181eb394SGavin Shan *in_slab = use_slab; 431181eb394SGavin Shan 432142b45a7SBenjamin Herrenschmidt return 0; 433142b45a7SBenjamin Herrenschmidt } 434142b45a7SBenjamin Herrenschmidt 435784656f9STejun Heo /** 436784656f9STejun Heo * memblock_merge_regions - merge neighboring compatible regions 437784656f9STejun Heo * @type: memblock type to scan 438784656f9STejun Heo * 439784656f9STejun Heo * Scan @type and merge neighboring compatible regions. 440784656f9STejun Heo */ 441784656f9STejun Heo static void __init_memblock memblock_merge_regions(struct memblock_type *type) 442784656f9STejun Heo { 443784656f9STejun Heo int i = 0; 444784656f9STejun Heo 445784656f9STejun Heo /* cnt never goes below 1 */ 446784656f9STejun Heo while (i < type->cnt - 1) { 447784656f9STejun Heo struct memblock_region *this = &type->regions[i]; 448784656f9STejun Heo struct memblock_region *next = &type->regions[i + 1]; 449784656f9STejun Heo 4507c0caeb8STejun Heo if (this->base + this->size != next->base || 4517c0caeb8STejun Heo memblock_get_region_node(this) != 45266a20757STang Chen memblock_get_region_node(next) || 45366a20757STang Chen this->flags != next->flags) { 454784656f9STejun Heo BUG_ON(this->base + this->size > next->base); 455784656f9STejun Heo i++; 456784656f9STejun Heo continue; 457784656f9STejun Heo } 458784656f9STejun Heo 459784656f9STejun Heo this->size += next->size; 460c0232ae8SLin Feng /* move forward from next + 1, index of which is i + 2 */ 461c0232ae8SLin Feng memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); 462784656f9STejun Heo type->cnt--; 463784656f9STejun Heo } 464784656f9STejun Heo } 465784656f9STejun Heo 466784656f9STejun Heo /** 467784656f9STejun Heo * memblock_insert_region - insert new memblock region 468784656f9STejun Heo * @type: memblock type to insert into 469784656f9STejun Heo * @idx: index for the insertion point 470784656f9STejun Heo * @base: base address of the new region 471784656f9STejun Heo * @size: size of the new region 472209ff86dSTang Chen * @nid: node id of the new region 47366a20757STang Chen * @flags: flags of the new region 474784656f9STejun Heo * 475784656f9STejun Heo * Insert new memblock region [@base,@base+@size) into @type at @idx. 476412d0008SAlexander Kuleshov * @type must already have extra room to accommodate the new region. 477784656f9STejun Heo */ 478784656f9STejun Heo static void __init_memblock memblock_insert_region(struct memblock_type *type, 479784656f9STejun Heo int idx, phys_addr_t base, 48066a20757STang Chen phys_addr_t size, 48166a20757STang Chen int nid, unsigned long flags) 482784656f9STejun Heo { 483784656f9STejun Heo struct memblock_region *rgn = &type->regions[idx]; 484784656f9STejun Heo 485784656f9STejun Heo BUG_ON(type->cnt >= type->max); 486784656f9STejun Heo memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); 487784656f9STejun Heo rgn->base = base; 488784656f9STejun Heo rgn->size = size; 48966a20757STang Chen rgn->flags = flags; 4907c0caeb8STejun Heo memblock_set_region_node(rgn, nid); 491784656f9STejun Heo type->cnt++; 4921440c4e2STejun Heo type->total_size += size; 493784656f9STejun Heo } 494784656f9STejun Heo 495784656f9STejun Heo /** 496f1af9d3aSPhilipp Hachtmann * memblock_add_range - add new memblock region 497784656f9STejun Heo * @type: memblock type to add new region into 498784656f9STejun Heo * @base: base address of the new region 499784656f9STejun Heo * @size: size of the new region 5007fb0bc3fSTejun Heo * @nid: nid of the new region 50166a20757STang Chen * @flags: flags of the new region 502784656f9STejun Heo * 503784656f9STejun Heo * Add new memblock region [@base,@base+@size) into @type. The new region 504784656f9STejun Heo * is allowed to overlap with existing ones - overlaps don't affect already 505784656f9STejun Heo * existing regions. @type is guaranteed to be minimal (all neighbouring 506784656f9STejun Heo * compatible regions are merged) after the addition. 507784656f9STejun Heo * 508784656f9STejun Heo * RETURNS: 509784656f9STejun Heo * 0 on success, -errno on failure. 510784656f9STejun Heo */ 511f1af9d3aSPhilipp Hachtmann int __init_memblock memblock_add_range(struct memblock_type *type, 51266a20757STang Chen phys_addr_t base, phys_addr_t size, 51366a20757STang Chen int nid, unsigned long flags) 51495f72d1eSYinghai Lu { 515784656f9STejun Heo bool insert = false; 516eb18f1b5STejun Heo phys_addr_t obase = base; 517eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 5188c9c1701SAlexander Kuleshov int idx, nr_new; 5198c9c1701SAlexander Kuleshov struct memblock_region *rgn; 52095f72d1eSYinghai Lu 521b3dc627cSTejun Heo if (!size) 522b3dc627cSTejun Heo return 0; 523b3dc627cSTejun Heo 524784656f9STejun Heo /* special case for empty array */ 525784656f9STejun Heo if (type->regions[0].size == 0) { 5261440c4e2STejun Heo WARN_ON(type->cnt != 1 || type->total_size); 527784656f9STejun Heo type->regions[0].base = base; 528784656f9STejun Heo type->regions[0].size = size; 52966a20757STang Chen type->regions[0].flags = flags; 5307fb0bc3fSTejun Heo memblock_set_region_node(&type->regions[0], nid); 5311440c4e2STejun Heo type->total_size = size; 532784656f9STejun Heo return 0; 533784656f9STejun Heo } 534784656f9STejun Heo repeat: 535784656f9STejun Heo /* 536784656f9STejun Heo * The following is executed twice. Once with %false @insert and 537784656f9STejun Heo * then with %true. The first counts the number of regions needed 538412d0008SAlexander Kuleshov * to accommodate the new area. The second actually inserts them. 539784656f9STejun Heo */ 540784656f9STejun Heo base = obase; 541784656f9STejun Heo nr_new = 0; 542784656f9STejun Heo 5438c9c1701SAlexander Kuleshov for_each_memblock_type(type, rgn) { 544784656f9STejun Heo phys_addr_t rbase = rgn->base; 545784656f9STejun Heo phys_addr_t rend = rbase + rgn->size; 5468f7a6605SBenjamin Herrenschmidt 547784656f9STejun Heo if (rbase >= end) 5488f7a6605SBenjamin Herrenschmidt break; 549784656f9STejun Heo if (rend <= base) 550784656f9STejun Heo continue; 551784656f9STejun Heo /* 552784656f9STejun Heo * @rgn overlaps. If it separates the lower part of new 553784656f9STejun Heo * area, insert that portion. 5548f7a6605SBenjamin Herrenschmidt */ 555784656f9STejun Heo if (rbase > base) { 556c0a29498SWei Yang #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 557c0a29498SWei Yang WARN_ON(nid != memblock_get_region_node(rgn)); 558c0a29498SWei Yang #endif 5594fcab5f4SWei Yang WARN_ON(flags != rgn->flags); 560784656f9STejun Heo nr_new++; 561784656f9STejun Heo if (insert) 5628c9c1701SAlexander Kuleshov memblock_insert_region(type, idx++, base, 56366a20757STang Chen rbase - base, nid, 56466a20757STang Chen flags); 565784656f9STejun Heo } 566784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 567784656f9STejun Heo base = min(rend, end); 5688f7a6605SBenjamin Herrenschmidt } 5698f7a6605SBenjamin Herrenschmidt 570784656f9STejun Heo /* insert the remaining portion */ 571784656f9STejun Heo if (base < end) { 572784656f9STejun Heo nr_new++; 573784656f9STejun Heo if (insert) 5748c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, base, end - base, 57566a20757STang Chen nid, flags); 5768f7a6605SBenjamin Herrenschmidt } 5778f7a6605SBenjamin Herrenschmidt 578ef3cc4dbSnimisolo if (!nr_new) 579ef3cc4dbSnimisolo return 0; 580ef3cc4dbSnimisolo 581784656f9STejun Heo /* 582784656f9STejun Heo * If this was the first round, resize array and repeat for actual 583784656f9STejun Heo * insertions; otherwise, merge and return. 5848f7a6605SBenjamin Herrenschmidt */ 585784656f9STejun Heo if (!insert) { 586784656f9STejun Heo while (type->cnt + nr_new > type->max) 58748c3b583SGreg Pearson if (memblock_double_array(type, obase, size) < 0) 588784656f9STejun Heo return -ENOMEM; 589784656f9STejun Heo insert = true; 590784656f9STejun Heo goto repeat; 59195f72d1eSYinghai Lu } else { 592784656f9STejun Heo memblock_merge_regions(type); 59395f72d1eSYinghai Lu return 0; 59495f72d1eSYinghai Lu } 595784656f9STejun Heo } 59695f72d1eSYinghai Lu 5977fb0bc3fSTejun Heo int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, 5987fb0bc3fSTejun Heo int nid) 5997fb0bc3fSTejun Heo { 600f1af9d3aSPhilipp Hachtmann return memblock_add_range(&memblock.memory, base, size, nid, 0); 6017fb0bc3fSTejun Heo } 6027fb0bc3fSTejun Heo 603f705ac4bSAlexander Kuleshov int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 6046a4055bcSAlexander Kuleshov { 6055d63f81cSMiles Chen phys_addr_t end = base + size - 1; 6065d63f81cSMiles Chen 6075d63f81cSMiles Chen memblock_dbg("memblock_add: [%pa-%pa] %pF\n", 6085d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 6096a4055bcSAlexander Kuleshov 610f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); 61195f72d1eSYinghai Lu } 61295f72d1eSYinghai Lu 6136a9ceb31STejun Heo /** 6146a9ceb31STejun Heo * memblock_isolate_range - isolate given range into disjoint memblocks 6156a9ceb31STejun Heo * @type: memblock type to isolate range for 6166a9ceb31STejun Heo * @base: base of range to isolate 6176a9ceb31STejun Heo * @size: size of range to isolate 6186a9ceb31STejun Heo * @start_rgn: out parameter for the start of isolated region 6196a9ceb31STejun Heo * @end_rgn: out parameter for the end of isolated region 6206a9ceb31STejun Heo * 6216a9ceb31STejun Heo * Walk @type and ensure that regions don't cross the boundaries defined by 6226a9ceb31STejun Heo * [@base,@base+@size). Crossing regions are split at the boundaries, 6236a9ceb31STejun Heo * which may create at most two more regions. The index of the first 6246a9ceb31STejun Heo * region inside the range is returned in *@start_rgn and end in *@end_rgn. 6256a9ceb31STejun Heo * 6266a9ceb31STejun Heo * RETURNS: 6276a9ceb31STejun Heo * 0 on success, -errno on failure. 6286a9ceb31STejun Heo */ 6296a9ceb31STejun Heo static int __init_memblock memblock_isolate_range(struct memblock_type *type, 6306a9ceb31STejun Heo phys_addr_t base, phys_addr_t size, 6316a9ceb31STejun Heo int *start_rgn, int *end_rgn) 6326a9ceb31STejun Heo { 633eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 6348c9c1701SAlexander Kuleshov int idx; 6358c9c1701SAlexander Kuleshov struct memblock_region *rgn; 6366a9ceb31STejun Heo 6376a9ceb31STejun Heo *start_rgn = *end_rgn = 0; 6386a9ceb31STejun Heo 639b3dc627cSTejun Heo if (!size) 640b3dc627cSTejun Heo return 0; 641b3dc627cSTejun Heo 6426a9ceb31STejun Heo /* we'll create at most two more regions */ 6436a9ceb31STejun Heo while (type->cnt + 2 > type->max) 64448c3b583SGreg Pearson if (memblock_double_array(type, base, size) < 0) 6456a9ceb31STejun Heo return -ENOMEM; 6466a9ceb31STejun Heo 6478c9c1701SAlexander Kuleshov for_each_memblock_type(type, rgn) { 6486a9ceb31STejun Heo phys_addr_t rbase = rgn->base; 6496a9ceb31STejun Heo phys_addr_t rend = rbase + rgn->size; 6506a9ceb31STejun Heo 6516a9ceb31STejun Heo if (rbase >= end) 6526a9ceb31STejun Heo break; 6536a9ceb31STejun Heo if (rend <= base) 6546a9ceb31STejun Heo continue; 6556a9ceb31STejun Heo 6566a9ceb31STejun Heo if (rbase < base) { 6576a9ceb31STejun Heo /* 6586a9ceb31STejun Heo * @rgn intersects from below. Split and continue 6596a9ceb31STejun Heo * to process the next region - the new top half. 6606a9ceb31STejun Heo */ 6616a9ceb31STejun Heo rgn->base = base; 6621440c4e2STejun Heo rgn->size -= base - rbase; 6631440c4e2STejun Heo type->total_size -= base - rbase; 6648c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, rbase, base - rbase, 66566a20757STang Chen memblock_get_region_node(rgn), 66666a20757STang Chen rgn->flags); 6676a9ceb31STejun Heo } else if (rend > end) { 6686a9ceb31STejun Heo /* 6696a9ceb31STejun Heo * @rgn intersects from above. Split and redo the 6706a9ceb31STejun Heo * current region - the new bottom half. 6716a9ceb31STejun Heo */ 6726a9ceb31STejun Heo rgn->base = end; 6731440c4e2STejun Heo rgn->size -= end - rbase; 6741440c4e2STejun Heo type->total_size -= end - rbase; 6758c9c1701SAlexander Kuleshov memblock_insert_region(type, idx--, rbase, end - rbase, 67666a20757STang Chen memblock_get_region_node(rgn), 67766a20757STang Chen rgn->flags); 6786a9ceb31STejun Heo } else { 6796a9ceb31STejun Heo /* @rgn is fully contained, record it */ 6806a9ceb31STejun Heo if (!*end_rgn) 6818c9c1701SAlexander Kuleshov *start_rgn = idx; 6828c9c1701SAlexander Kuleshov *end_rgn = idx + 1; 6836a9ceb31STejun Heo } 6846a9ceb31STejun Heo } 6856a9ceb31STejun Heo 6866a9ceb31STejun Heo return 0; 6876a9ceb31STejun Heo } 6886a9ceb31STejun Heo 68935bd16a2SAlexander Kuleshov static int __init_memblock memblock_remove_range(struct memblock_type *type, 6908f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 69195f72d1eSYinghai Lu { 69271936180STejun Heo int start_rgn, end_rgn; 69371936180STejun Heo int i, ret; 69495f72d1eSYinghai Lu 69571936180STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 69671936180STejun Heo if (ret) 69771936180STejun Heo return ret; 69895f72d1eSYinghai Lu 69971936180STejun Heo for (i = end_rgn - 1; i >= start_rgn; i--) 70071936180STejun Heo memblock_remove_region(type, i); 70195f72d1eSYinghai Lu return 0; 70295f72d1eSYinghai Lu } 70395f72d1eSYinghai Lu 704581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 70595f72d1eSYinghai Lu { 706f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.memory, base, size); 70795f72d1eSYinghai Lu } 70895f72d1eSYinghai Lu 709f1af9d3aSPhilipp Hachtmann 710581adcbeSTejun Heo int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) 71195f72d1eSYinghai Lu { 7125d63f81cSMiles Chen phys_addr_t end = base + size - 1; 7135d63f81cSMiles Chen 7145d63f81cSMiles Chen memblock_dbg(" memblock_free: [%pa-%pa] %pF\n", 7155d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 71624aa0788STejun Heo 7179099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 718f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.reserved, base, size); 71995f72d1eSYinghai Lu } 72095f72d1eSYinghai Lu 721f705ac4bSAlexander Kuleshov int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 72295f72d1eSYinghai Lu { 7235d63f81cSMiles Chen phys_addr_t end = base + size - 1; 7245d63f81cSMiles Chen 7255d63f81cSMiles Chen memblock_dbg("memblock_reserve: [%pa-%pa] %pF\n", 7265d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 72795f72d1eSYinghai Lu 728f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); 72995f72d1eSYinghai Lu } 73095f72d1eSYinghai Lu 73135fd0808STejun Heo /** 73266b16edfSTang Chen * 7334308ce17STony Luck * This function isolates region [@base, @base + @size), and sets/clears flag 73466b16edfSTang Chen * 735c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 73666b16edfSTang Chen */ 7374308ce17STony Luck static int __init_memblock memblock_setclr_flag(phys_addr_t base, 7384308ce17STony Luck phys_addr_t size, int set, int flag) 73966b16edfSTang Chen { 74066b16edfSTang Chen struct memblock_type *type = &memblock.memory; 74166b16edfSTang Chen int i, ret, start_rgn, end_rgn; 74266b16edfSTang Chen 74366b16edfSTang Chen ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 74466b16edfSTang Chen if (ret) 74566b16edfSTang Chen return ret; 74666b16edfSTang Chen 74766b16edfSTang Chen for (i = start_rgn; i < end_rgn; i++) 7484308ce17STony Luck if (set) 7494308ce17STony Luck memblock_set_region_flags(&type->regions[i], flag); 7504308ce17STony Luck else 7514308ce17STony Luck memblock_clear_region_flags(&type->regions[i], flag); 75266b16edfSTang Chen 75366b16edfSTang Chen memblock_merge_regions(type); 75466b16edfSTang Chen return 0; 75566b16edfSTang Chen } 75666b16edfSTang Chen 75766b16edfSTang Chen /** 7584308ce17STony Luck * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. 7594308ce17STony Luck * @base: the base phys addr of the region 7604308ce17STony Luck * @size: the size of the region 7614308ce17STony Luck * 762c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 7634308ce17STony Luck */ 7644308ce17STony Luck int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) 7654308ce17STony Luck { 7664308ce17STony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); 7674308ce17STony Luck } 7684308ce17STony Luck 7694308ce17STony Luck /** 77066b16edfSTang Chen * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. 77166b16edfSTang Chen * @base: the base phys addr of the region 77266b16edfSTang Chen * @size: the size of the region 77366b16edfSTang Chen * 774c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 77566b16edfSTang Chen */ 77666b16edfSTang Chen int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) 77766b16edfSTang Chen { 7784308ce17STony Luck return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); 77966b16edfSTang Chen } 78066b16edfSTang Chen 78166b16edfSTang Chen /** 782a3f5bafcSTony Luck * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. 783a3f5bafcSTony Luck * @base: the base phys addr of the region 784a3f5bafcSTony Luck * @size: the size of the region 785a3f5bafcSTony Luck * 786c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 787a3f5bafcSTony Luck */ 788a3f5bafcSTony Luck int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) 789a3f5bafcSTony Luck { 790a3f5bafcSTony Luck system_has_some_mirror = true; 791a3f5bafcSTony Luck 792a3f5bafcSTony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); 793a3f5bafcSTony Luck } 794a3f5bafcSTony Luck 795bf3d3cc5SArd Biesheuvel /** 796bf3d3cc5SArd Biesheuvel * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. 797bf3d3cc5SArd Biesheuvel * @base: the base phys addr of the region 798bf3d3cc5SArd Biesheuvel * @size: the size of the region 799bf3d3cc5SArd Biesheuvel * 800bf3d3cc5SArd Biesheuvel * Return 0 on success, -errno on failure. 801bf3d3cc5SArd Biesheuvel */ 802bf3d3cc5SArd Biesheuvel int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) 803bf3d3cc5SArd Biesheuvel { 804bf3d3cc5SArd Biesheuvel return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); 805bf3d3cc5SArd Biesheuvel } 806a3f5bafcSTony Luck 807a3f5bafcSTony Luck /** 8084c546b8aSAKASHI Takahiro * memblock_clear_nomap - Clear flag MEMBLOCK_NOMAP for a specified region. 8094c546b8aSAKASHI Takahiro * @base: the base phys addr of the region 8104c546b8aSAKASHI Takahiro * @size: the size of the region 8114c546b8aSAKASHI Takahiro * 8124c546b8aSAKASHI Takahiro * Return 0 on success, -errno on failure. 8134c546b8aSAKASHI Takahiro */ 8144c546b8aSAKASHI Takahiro int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size) 8154c546b8aSAKASHI Takahiro { 8164c546b8aSAKASHI Takahiro return memblock_setclr_flag(base, size, 0, MEMBLOCK_NOMAP); 8174c546b8aSAKASHI Takahiro } 8184c546b8aSAKASHI Takahiro 8194c546b8aSAKASHI Takahiro /** 8208e7a7f86SRobin Holt * __next_reserved_mem_region - next function for for_each_reserved_region() 8218e7a7f86SRobin Holt * @idx: pointer to u64 loop variable 8228e7a7f86SRobin Holt * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL 8238e7a7f86SRobin Holt * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL 8248e7a7f86SRobin Holt * 8258e7a7f86SRobin Holt * Iterate over all reserved memory regions. 8268e7a7f86SRobin Holt */ 8278e7a7f86SRobin Holt void __init_memblock __next_reserved_mem_region(u64 *idx, 8288e7a7f86SRobin Holt phys_addr_t *out_start, 8298e7a7f86SRobin Holt phys_addr_t *out_end) 8308e7a7f86SRobin Holt { 831567d117bSAlexander Kuleshov struct memblock_type *type = &memblock.reserved; 8328e7a7f86SRobin Holt 833cd33a76bSRichard Leitner if (*idx < type->cnt) { 834567d117bSAlexander Kuleshov struct memblock_region *r = &type->regions[*idx]; 8358e7a7f86SRobin Holt phys_addr_t base = r->base; 8368e7a7f86SRobin Holt phys_addr_t size = r->size; 8378e7a7f86SRobin Holt 8388e7a7f86SRobin Holt if (out_start) 8398e7a7f86SRobin Holt *out_start = base; 8408e7a7f86SRobin Holt if (out_end) 8418e7a7f86SRobin Holt *out_end = base + size - 1; 8428e7a7f86SRobin Holt 8438e7a7f86SRobin Holt *idx += 1; 8448e7a7f86SRobin Holt return; 8458e7a7f86SRobin Holt } 8468e7a7f86SRobin Holt 8478e7a7f86SRobin Holt /* signal end of iteration */ 8488e7a7f86SRobin Holt *idx = ULLONG_MAX; 8498e7a7f86SRobin Holt } 8508e7a7f86SRobin Holt 8518e7a7f86SRobin Holt /** 852f1af9d3aSPhilipp Hachtmann * __next__mem_range - next function for for_each_free_mem_range() etc. 85335fd0808STejun Heo * @idx: pointer to u64 loop variable 854b1154233SGrygorii Strashko * @nid: node selector, %NUMA_NO_NODE for all nodes 855fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 856f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 857f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 858dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 859dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 860dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 86135fd0808STejun Heo * 862f1af9d3aSPhilipp Hachtmann * Find the first area from *@idx which matches @nid, fill the out 86335fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 864f1af9d3aSPhilipp Hachtmann * *@idx contains index into type_a and the upper 32bit indexes the 865f1af9d3aSPhilipp Hachtmann * areas before each region in type_b. For example, if type_b regions 86635fd0808STejun Heo * look like the following, 86735fd0808STejun Heo * 86835fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 86935fd0808STejun Heo * 87035fd0808STejun Heo * The upper 32bit indexes the following regions. 87135fd0808STejun Heo * 87235fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 87335fd0808STejun Heo * 87435fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 87535fd0808STejun Heo * in lockstep and returns each intersection. 87635fd0808STejun Heo */ 877fc6daaf9STony Luck void __init_memblock __next_mem_range(u64 *idx, int nid, ulong flags, 878f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 879f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 88035fd0808STejun Heo phys_addr_t *out_start, 88135fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 88235fd0808STejun Heo { 883f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 884f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 885b1154233SGrygorii Strashko 886f1af9d3aSPhilipp Hachtmann if (WARN_ONCE(nid == MAX_NUMNODES, 887f1af9d3aSPhilipp Hachtmann "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 888560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 88935fd0808STejun Heo 890f1af9d3aSPhilipp Hachtmann for (; idx_a < type_a->cnt; idx_a++) { 891f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 892f1af9d3aSPhilipp Hachtmann 89335fd0808STejun Heo phys_addr_t m_start = m->base; 89435fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 895f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 89635fd0808STejun Heo 89735fd0808STejun Heo /* only memory regions are associated with nodes, check it */ 898f1af9d3aSPhilipp Hachtmann if (nid != NUMA_NO_NODE && nid != m_nid) 89935fd0808STejun Heo continue; 90035fd0808STejun Heo 9010a313a99SXishi Qiu /* skip hotpluggable memory regions if needed */ 9020a313a99SXishi Qiu if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 9030a313a99SXishi Qiu continue; 9040a313a99SXishi Qiu 905a3f5bafcSTony Luck /* if we want mirror memory skip non-mirror memory regions */ 906a3f5bafcSTony Luck if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 907a3f5bafcSTony Luck continue; 908a3f5bafcSTony Luck 909bf3d3cc5SArd Biesheuvel /* skip nomap memory unless we were asked for it explicitly */ 910bf3d3cc5SArd Biesheuvel if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) 911bf3d3cc5SArd Biesheuvel continue; 912bf3d3cc5SArd Biesheuvel 913f1af9d3aSPhilipp Hachtmann if (!type_b) { 914f1af9d3aSPhilipp Hachtmann if (out_start) 915f1af9d3aSPhilipp Hachtmann *out_start = m_start; 916f1af9d3aSPhilipp Hachtmann if (out_end) 917f1af9d3aSPhilipp Hachtmann *out_end = m_end; 918f1af9d3aSPhilipp Hachtmann if (out_nid) 919f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 920f1af9d3aSPhilipp Hachtmann idx_a++; 921f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 922f1af9d3aSPhilipp Hachtmann return; 923f1af9d3aSPhilipp Hachtmann } 92435fd0808STejun Heo 925f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 926f1af9d3aSPhilipp Hachtmann for (; idx_b < type_b->cnt + 1; idx_b++) { 927f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 928f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 929f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 930f1af9d3aSPhilipp Hachtmann 931f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 932f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 933f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 934f1af9d3aSPhilipp Hachtmann r->base : ULLONG_MAX; 935f1af9d3aSPhilipp Hachtmann 936f1af9d3aSPhilipp Hachtmann /* 937f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 938f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 939f1af9d3aSPhilipp Hachtmann */ 94035fd0808STejun Heo if (r_start >= m_end) 94135fd0808STejun Heo break; 94235fd0808STejun Heo /* if the two regions intersect, we're done */ 94335fd0808STejun Heo if (m_start < r_end) { 94435fd0808STejun Heo if (out_start) 945f1af9d3aSPhilipp Hachtmann *out_start = 946f1af9d3aSPhilipp Hachtmann max(m_start, r_start); 94735fd0808STejun Heo if (out_end) 94835fd0808STejun Heo *out_end = min(m_end, r_end); 94935fd0808STejun Heo if (out_nid) 950f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 95135fd0808STejun Heo /* 952f1af9d3aSPhilipp Hachtmann * The region which ends first is 953f1af9d3aSPhilipp Hachtmann * advanced for the next iteration. 95435fd0808STejun Heo */ 95535fd0808STejun Heo if (m_end <= r_end) 956f1af9d3aSPhilipp Hachtmann idx_a++; 95735fd0808STejun Heo else 958f1af9d3aSPhilipp Hachtmann idx_b++; 959f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 96035fd0808STejun Heo return; 96135fd0808STejun Heo } 96235fd0808STejun Heo } 96335fd0808STejun Heo } 96435fd0808STejun Heo 96535fd0808STejun Heo /* signal end of iteration */ 96635fd0808STejun Heo *idx = ULLONG_MAX; 96735fd0808STejun Heo } 96835fd0808STejun Heo 9697bd0b0f0STejun Heo /** 970f1af9d3aSPhilipp Hachtmann * __next_mem_range_rev - generic next function for for_each_*_range_rev() 971f1af9d3aSPhilipp Hachtmann * 972f1af9d3aSPhilipp Hachtmann * Finds the next range from type_a which is not marked as unsuitable 973f1af9d3aSPhilipp Hachtmann * in type_b. 974f1af9d3aSPhilipp Hachtmann * 9757bd0b0f0STejun Heo * @idx: pointer to u64 loop variable 976ad5ea8cdSAlexander Kuleshov * @nid: node selector, %NUMA_NO_NODE for all nodes 977fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 978f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 979f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 980dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 981dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 982dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 9837bd0b0f0STejun Heo * 984f1af9d3aSPhilipp Hachtmann * Reverse of __next_mem_range(). 9857bd0b0f0STejun Heo */ 986fc6daaf9STony Luck void __init_memblock __next_mem_range_rev(u64 *idx, int nid, ulong flags, 987f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 988f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 9897bd0b0f0STejun Heo phys_addr_t *out_start, 9907bd0b0f0STejun Heo phys_addr_t *out_end, int *out_nid) 9917bd0b0f0STejun Heo { 992f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 993f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 994b1154233SGrygorii Strashko 995560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 996560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 9977bd0b0f0STejun Heo 9987bd0b0f0STejun Heo if (*idx == (u64)ULLONG_MAX) { 999f1af9d3aSPhilipp Hachtmann idx_a = type_a->cnt - 1; 1000e47608abSzijun_hu if (type_b != NULL) 1001f1af9d3aSPhilipp Hachtmann idx_b = type_b->cnt; 1002e47608abSzijun_hu else 1003e47608abSzijun_hu idx_b = 0; 10047bd0b0f0STejun Heo } 10057bd0b0f0STejun Heo 1006f1af9d3aSPhilipp Hachtmann for (; idx_a >= 0; idx_a--) { 1007f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1008f1af9d3aSPhilipp Hachtmann 10097bd0b0f0STejun Heo phys_addr_t m_start = m->base; 10107bd0b0f0STejun Heo phys_addr_t m_end = m->base + m->size; 1011f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 10127bd0b0f0STejun Heo 10137bd0b0f0STejun Heo /* only memory regions are associated with nodes, check it */ 1014f1af9d3aSPhilipp Hachtmann if (nid != NUMA_NO_NODE && nid != m_nid) 10157bd0b0f0STejun Heo continue; 10167bd0b0f0STejun Heo 101755ac590cSTang Chen /* skip hotpluggable memory regions if needed */ 101855ac590cSTang Chen if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 101955ac590cSTang Chen continue; 102055ac590cSTang Chen 1021a3f5bafcSTony Luck /* if we want mirror memory skip non-mirror memory regions */ 1022a3f5bafcSTony Luck if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 1023a3f5bafcSTony Luck continue; 1024a3f5bafcSTony Luck 1025bf3d3cc5SArd Biesheuvel /* skip nomap memory unless we were asked for it explicitly */ 1026bf3d3cc5SArd Biesheuvel if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) 1027bf3d3cc5SArd Biesheuvel continue; 1028bf3d3cc5SArd Biesheuvel 1029f1af9d3aSPhilipp Hachtmann if (!type_b) { 1030f1af9d3aSPhilipp Hachtmann if (out_start) 1031f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1032f1af9d3aSPhilipp Hachtmann if (out_end) 1033f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1034f1af9d3aSPhilipp Hachtmann if (out_nid) 1035f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1036fb399b48Szijun_hu idx_a--; 1037f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1038f1af9d3aSPhilipp Hachtmann return; 1039f1af9d3aSPhilipp Hachtmann } 10407bd0b0f0STejun Heo 1041f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1042f1af9d3aSPhilipp Hachtmann for (; idx_b >= 0; idx_b--) { 1043f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1044f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1045f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1046f1af9d3aSPhilipp Hachtmann 1047f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1048f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1049f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 1050f1af9d3aSPhilipp Hachtmann r->base : ULLONG_MAX; 1051f1af9d3aSPhilipp Hachtmann /* 1052f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1053f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1054f1af9d3aSPhilipp Hachtmann */ 1055f1af9d3aSPhilipp Hachtmann 10567bd0b0f0STejun Heo if (r_end <= m_start) 10577bd0b0f0STejun Heo break; 10587bd0b0f0STejun Heo /* if the two regions intersect, we're done */ 10597bd0b0f0STejun Heo if (m_end > r_start) { 10607bd0b0f0STejun Heo if (out_start) 10617bd0b0f0STejun Heo *out_start = max(m_start, r_start); 10627bd0b0f0STejun Heo if (out_end) 10637bd0b0f0STejun Heo *out_end = min(m_end, r_end); 10647bd0b0f0STejun Heo if (out_nid) 1065f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 10667bd0b0f0STejun Heo if (m_start >= r_start) 1067f1af9d3aSPhilipp Hachtmann idx_a--; 10687bd0b0f0STejun Heo else 1069f1af9d3aSPhilipp Hachtmann idx_b--; 1070f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 10717bd0b0f0STejun Heo return; 10727bd0b0f0STejun Heo } 10737bd0b0f0STejun Heo } 10747bd0b0f0STejun Heo } 1075f1af9d3aSPhilipp Hachtmann /* signal end of iteration */ 10767bd0b0f0STejun Heo *idx = ULLONG_MAX; 10777bd0b0f0STejun Heo } 10787bd0b0f0STejun Heo 10797c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 10807c0caeb8STejun Heo /* 10817c0caeb8STejun Heo * Common iterator interface used to define for_each_mem_range(). 10827c0caeb8STejun Heo */ 10837c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 10847c0caeb8STejun Heo unsigned long *out_start_pfn, 10857c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 10867c0caeb8STejun Heo { 10877c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 10887c0caeb8STejun Heo struct memblock_region *r; 10897c0caeb8STejun Heo 10907c0caeb8STejun Heo while (++*idx < type->cnt) { 10917c0caeb8STejun Heo r = &type->regions[*idx]; 10927c0caeb8STejun Heo 10937c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 10947c0caeb8STejun Heo continue; 10957c0caeb8STejun Heo if (nid == MAX_NUMNODES || nid == r->nid) 10967c0caeb8STejun Heo break; 10977c0caeb8STejun Heo } 10987c0caeb8STejun Heo if (*idx >= type->cnt) { 10997c0caeb8STejun Heo *idx = -1; 11007c0caeb8STejun Heo return; 11017c0caeb8STejun Heo } 11027c0caeb8STejun Heo 11037c0caeb8STejun Heo if (out_start_pfn) 11047c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 11057c0caeb8STejun Heo if (out_end_pfn) 11067c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 11077c0caeb8STejun Heo if (out_nid) 11087c0caeb8STejun Heo *out_nid = r->nid; 11097c0caeb8STejun Heo } 11107c0caeb8STejun Heo 1111b92df1deSPaul Burton unsigned long __init_memblock memblock_next_valid_pfn(unsigned long pfn, 1112b92df1deSPaul Burton unsigned long max_pfn) 1113b92df1deSPaul Burton { 1114b92df1deSPaul Burton struct memblock_type *type = &memblock.memory; 1115b92df1deSPaul Burton unsigned int right = type->cnt; 1116b92df1deSPaul Burton unsigned int mid, left = 0; 1117b92df1deSPaul Burton phys_addr_t addr = PFN_PHYS(pfn + 1); 1118b92df1deSPaul Burton 1119b92df1deSPaul Burton do { 1120b92df1deSPaul Burton mid = (right + left) / 2; 1121b92df1deSPaul Burton 1122b92df1deSPaul Burton if (addr < type->regions[mid].base) 1123b92df1deSPaul Burton right = mid; 1124b92df1deSPaul Burton else if (addr >= (type->regions[mid].base + 1125b92df1deSPaul Burton type->regions[mid].size)) 1126b92df1deSPaul Burton left = mid + 1; 1127b92df1deSPaul Burton else { 1128b92df1deSPaul Burton /* addr is within the region, so pfn + 1 is valid */ 1129b92df1deSPaul Burton return min(pfn + 1, max_pfn); 1130b92df1deSPaul Burton } 1131b92df1deSPaul Burton } while (left < right); 1132b92df1deSPaul Burton 1133c9a1b80dSAKASHI Takahiro if (right == type->cnt) 1134c9a1b80dSAKASHI Takahiro return max_pfn; 1135c9a1b80dSAKASHI Takahiro else 1136b92df1deSPaul Burton return min(PHYS_PFN(type->regions[right].base), max_pfn); 1137b92df1deSPaul Burton } 1138b92df1deSPaul Burton 11397c0caeb8STejun Heo /** 11407c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 11417c0caeb8STejun Heo * @base: base of area to set node ID for 11427c0caeb8STejun Heo * @size: size of area to set node ID for 1143e7e8de59STang Chen * @type: memblock type to set node ID for 11447c0caeb8STejun Heo * @nid: node ID to set 11457c0caeb8STejun Heo * 1146e7e8de59STang Chen * Set the nid of memblock @type regions in [@base,@base+@size) to @nid. 11477c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 11487c0caeb8STejun Heo * 11497c0caeb8STejun Heo * RETURNS: 11507c0caeb8STejun Heo * 0 on success, -errno on failure. 11517c0caeb8STejun Heo */ 11527c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 1153e7e8de59STang Chen struct memblock_type *type, int nid) 11547c0caeb8STejun Heo { 11556a9ceb31STejun Heo int start_rgn, end_rgn; 11566a9ceb31STejun Heo int i, ret; 11577c0caeb8STejun Heo 11586a9ceb31STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 11596a9ceb31STejun Heo if (ret) 11606a9ceb31STejun Heo return ret; 11617c0caeb8STejun Heo 11626a9ceb31STejun Heo for (i = start_rgn; i < end_rgn; i++) 1163e9d24ad3SWanpeng Li memblock_set_region_node(&type->regions[i], nid); 11647c0caeb8STejun Heo 11657c0caeb8STejun Heo memblock_merge_regions(type); 11667c0caeb8STejun Heo return 0; 11677c0caeb8STejun Heo } 11687c0caeb8STejun Heo #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ 11697c0caeb8STejun Heo 11702bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, 11712bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t start, 1172fc6daaf9STony Luck phys_addr_t end, int nid, ulong flags) 117395f72d1eSYinghai Lu { 11746ed311b2SBenjamin Herrenschmidt phys_addr_t found; 117595f72d1eSYinghai Lu 117679f40fabSGrygorii Strashko if (!align) 117779f40fabSGrygorii Strashko align = SMP_CACHE_BYTES; 117894f3d3afSVineet Gupta 1179fc6daaf9STony Luck found = memblock_find_in_range_node(size, align, start, end, nid, 1180fc6daaf9STony Luck flags); 1181aedf95eaSCatalin Marinas if (found && !memblock_reserve(found, size)) { 1182aedf95eaSCatalin Marinas /* 1183aedf95eaSCatalin Marinas * The min_count is set to 0 so that memblock allocations are 1184aedf95eaSCatalin Marinas * never reported as leaks. 1185aedf95eaSCatalin Marinas */ 11869099daedSCatalin Marinas kmemleak_alloc_phys(found, size, 0, 0); 11876ed311b2SBenjamin Herrenschmidt return found; 1188aedf95eaSCatalin Marinas } 11896ed311b2SBenjamin Herrenschmidt return 0; 119095f72d1eSYinghai Lu } 119195f72d1eSYinghai Lu 11922bfc2862SAkinobu Mita phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, 1193fc6daaf9STony Luck phys_addr_t start, phys_addr_t end, 1194fc6daaf9STony Luck ulong flags) 11952bfc2862SAkinobu Mita { 1196fc6daaf9STony Luck return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, 1197fc6daaf9STony Luck flags); 11982bfc2862SAkinobu Mita } 11992bfc2862SAkinobu Mita 12002bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size, 12012bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t max_addr, 1202fc6daaf9STony Luck int nid, ulong flags) 12032bfc2862SAkinobu Mita { 1204fc6daaf9STony Luck return memblock_alloc_range_nid(size, align, 0, max_addr, nid, flags); 12052bfc2862SAkinobu Mita } 12062bfc2862SAkinobu Mita 12077bd0b0f0STejun Heo phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) 12087bd0b0f0STejun Heo { 1209a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 1210a3f5bafcSTony Luck phys_addr_t ret; 1211a3f5bafcSTony Luck 1212a3f5bafcSTony Luck again: 1213a3f5bafcSTony Luck ret = memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, 1214a3f5bafcSTony Luck nid, flags); 1215a3f5bafcSTony Luck 1216a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 1217a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 1218a3f5bafcSTony Luck goto again; 1219a3f5bafcSTony Luck } 1220a3f5bafcSTony Luck return ret; 12217bd0b0f0STejun Heo } 12227bd0b0f0STejun Heo 12237bd0b0f0STejun Heo phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 12247bd0b0f0STejun Heo { 1225fc6daaf9STony Luck return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE, 1226fc6daaf9STony Luck MEMBLOCK_NONE); 12277bd0b0f0STejun Heo } 12287bd0b0f0STejun Heo 12296ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 123095f72d1eSYinghai Lu { 12316ed311b2SBenjamin Herrenschmidt phys_addr_t alloc; 12326ed311b2SBenjamin Herrenschmidt 12336ed311b2SBenjamin Herrenschmidt alloc = __memblock_alloc_base(size, align, max_addr); 12346ed311b2SBenjamin Herrenschmidt 12356ed311b2SBenjamin Herrenschmidt if (alloc == 0) 12365d63f81cSMiles Chen panic("ERROR: Failed to allocate %pa bytes below %pa.\n", 12375d63f81cSMiles Chen &size, &max_addr); 12386ed311b2SBenjamin Herrenschmidt 12396ed311b2SBenjamin Herrenschmidt return alloc; 124095f72d1eSYinghai Lu } 124195f72d1eSYinghai Lu 12426ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) 124395f72d1eSYinghai Lu { 12446ed311b2SBenjamin Herrenschmidt return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 124595f72d1eSYinghai Lu } 124695f72d1eSYinghai Lu 12479d1e2492SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 12489d1e2492SBenjamin Herrenschmidt { 12499d1e2492SBenjamin Herrenschmidt phys_addr_t res = memblock_alloc_nid(size, align, nid); 12509d1e2492SBenjamin Herrenschmidt 12519d1e2492SBenjamin Herrenschmidt if (res) 12529d1e2492SBenjamin Herrenschmidt return res; 125315fb0972STejun Heo return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 125495f72d1eSYinghai Lu } 125595f72d1eSYinghai Lu 125626f09e9bSSantosh Shilimkar /** 125726f09e9bSSantosh Shilimkar * memblock_virt_alloc_internal - allocate boot memory block 125826f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 125926f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 126026f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region to allocate (phys address) 126126f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region to allocate (phys address) 126226f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 126326f09e9bSSantosh Shilimkar * 126426f09e9bSSantosh Shilimkar * The @min_addr limit is dropped if it can not be satisfied and the allocation 126526f09e9bSSantosh Shilimkar * will fall back to memory below @min_addr. Also, allocation may fall back 126626f09e9bSSantosh Shilimkar * to any node in the system if the specified node can not 126726f09e9bSSantosh Shilimkar * hold the requested memory. 126826f09e9bSSantosh Shilimkar * 126926f09e9bSSantosh Shilimkar * The allocation is performed from memory region limited by 127026f09e9bSSantosh Shilimkar * memblock.current_limit if @max_addr == %BOOTMEM_ALLOC_ACCESSIBLE. 127126f09e9bSSantosh Shilimkar * 127226f09e9bSSantosh Shilimkar * The memory block is aligned on SMP_CACHE_BYTES if @align == 0. 127326f09e9bSSantosh Shilimkar * 127426f09e9bSSantosh Shilimkar * The phys address of allocated boot memory block is converted to virtual and 127526f09e9bSSantosh Shilimkar * allocated memory is reset to 0. 127626f09e9bSSantosh Shilimkar * 127726f09e9bSSantosh Shilimkar * In addition, function sets the min_count to 0 using kmemleak_alloc for 127826f09e9bSSantosh Shilimkar * allocated boot memory block, so that it is never reported as leaks. 127926f09e9bSSantosh Shilimkar * 128026f09e9bSSantosh Shilimkar * RETURNS: 128126f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 128226f09e9bSSantosh Shilimkar */ 128326f09e9bSSantosh Shilimkar static void * __init memblock_virt_alloc_internal( 128426f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 128526f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 128626f09e9bSSantosh Shilimkar int nid) 128726f09e9bSSantosh Shilimkar { 128826f09e9bSSantosh Shilimkar phys_addr_t alloc; 128926f09e9bSSantosh Shilimkar void *ptr; 1290a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 129126f09e9bSSantosh Shilimkar 1292560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1293560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 129426f09e9bSSantosh Shilimkar 129526f09e9bSSantosh Shilimkar /* 129626f09e9bSSantosh Shilimkar * Detect any accidental use of these APIs after slab is ready, as at 129726f09e9bSSantosh Shilimkar * this moment memblock may be deinitialized already and its 129826f09e9bSSantosh Shilimkar * internal data may be destroyed (after execution of free_all_bootmem) 129926f09e9bSSantosh Shilimkar */ 130026f09e9bSSantosh Shilimkar if (WARN_ON_ONCE(slab_is_available())) 130126f09e9bSSantosh Shilimkar return kzalloc_node(size, GFP_NOWAIT, nid); 130226f09e9bSSantosh Shilimkar 130326f09e9bSSantosh Shilimkar if (!align) 130426f09e9bSSantosh Shilimkar align = SMP_CACHE_BYTES; 130526f09e9bSSantosh Shilimkar 1306f544e14fSYinghai Lu if (max_addr > memblock.current_limit) 1307f544e14fSYinghai Lu max_addr = memblock.current_limit; 130826f09e9bSSantosh Shilimkar again: 130926f09e9bSSantosh Shilimkar alloc = memblock_find_in_range_node(size, align, min_addr, max_addr, 1310a3f5bafcSTony Luck nid, flags); 13117d41c03eSWei Yang if (alloc && !memblock_reserve(alloc, size)) 131226f09e9bSSantosh Shilimkar goto done; 131326f09e9bSSantosh Shilimkar 131426f09e9bSSantosh Shilimkar if (nid != NUMA_NO_NODE) { 131526f09e9bSSantosh Shilimkar alloc = memblock_find_in_range_node(size, align, min_addr, 1316fc6daaf9STony Luck max_addr, NUMA_NO_NODE, 1317a3f5bafcSTony Luck flags); 13187d41c03eSWei Yang if (alloc && !memblock_reserve(alloc, size)) 131926f09e9bSSantosh Shilimkar goto done; 132026f09e9bSSantosh Shilimkar } 132126f09e9bSSantosh Shilimkar 132226f09e9bSSantosh Shilimkar if (min_addr) { 132326f09e9bSSantosh Shilimkar min_addr = 0; 132426f09e9bSSantosh Shilimkar goto again; 132526f09e9bSSantosh Shilimkar } 132626f09e9bSSantosh Shilimkar 1327a3f5bafcSTony Luck if (flags & MEMBLOCK_MIRROR) { 1328a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 1329a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 1330a3f5bafcSTony Luck &size); 1331a3f5bafcSTony Luck goto again; 1332a3f5bafcSTony Luck } 1333a3f5bafcSTony Luck 1334a3f5bafcSTony Luck return NULL; 133526f09e9bSSantosh Shilimkar done: 133626f09e9bSSantosh Shilimkar ptr = phys_to_virt(alloc); 133726f09e9bSSantosh Shilimkar memset(ptr, 0, size); 133826f09e9bSSantosh Shilimkar 133926f09e9bSSantosh Shilimkar /* 134026f09e9bSSantosh Shilimkar * The min_count is set to 0 so that bootmem allocated blocks 134126f09e9bSSantosh Shilimkar * are never reported as leaks. This is because many of these blocks 134226f09e9bSSantosh Shilimkar * are only referred via the physical address which is not 134326f09e9bSSantosh Shilimkar * looked up by kmemleak. 134426f09e9bSSantosh Shilimkar */ 134526f09e9bSSantosh Shilimkar kmemleak_alloc(ptr, size, 0, 0); 134626f09e9bSSantosh Shilimkar 134726f09e9bSSantosh Shilimkar return ptr; 134826f09e9bSSantosh Shilimkar } 134926f09e9bSSantosh Shilimkar 135026f09e9bSSantosh Shilimkar /** 135126f09e9bSSantosh Shilimkar * memblock_virt_alloc_try_nid_nopanic - allocate boot memory block 135226f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 135326f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 135426f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 135526f09e9bSSantosh Shilimkar * is preferred (phys address) 135626f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 135726f09e9bSSantosh Shilimkar * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to 135826f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 135926f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 136026f09e9bSSantosh Shilimkar * 136126f09e9bSSantosh Shilimkar * Public version of _memblock_virt_alloc_try_nid_nopanic() which provides 136226f09e9bSSantosh Shilimkar * additional debug information (including caller info), if enabled. 136326f09e9bSSantosh Shilimkar * 136426f09e9bSSantosh Shilimkar * RETURNS: 136526f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 136626f09e9bSSantosh Shilimkar */ 136726f09e9bSSantosh Shilimkar void * __init memblock_virt_alloc_try_nid_nopanic( 136826f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 136926f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 137026f09e9bSSantosh Shilimkar int nid) 137126f09e9bSSantosh Shilimkar { 137226f09e9bSSantosh Shilimkar memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", 137326f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 137426f09e9bSSantosh Shilimkar (u64)max_addr, (void *)_RET_IP_); 137526f09e9bSSantosh Shilimkar return memblock_virt_alloc_internal(size, align, min_addr, 137626f09e9bSSantosh Shilimkar max_addr, nid); 137726f09e9bSSantosh Shilimkar } 137826f09e9bSSantosh Shilimkar 137926f09e9bSSantosh Shilimkar /** 138026f09e9bSSantosh Shilimkar * memblock_virt_alloc_try_nid - allocate boot memory block with panicking 138126f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 138226f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 138326f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 138426f09e9bSSantosh Shilimkar * is preferred (phys address) 138526f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 138626f09e9bSSantosh Shilimkar * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to 138726f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 138826f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 138926f09e9bSSantosh Shilimkar * 139026f09e9bSSantosh Shilimkar * Public panicking version of _memblock_virt_alloc_try_nid_nopanic() 139126f09e9bSSantosh Shilimkar * which provides debug information (including caller info), if enabled, 139226f09e9bSSantosh Shilimkar * and panics if the request can not be satisfied. 139326f09e9bSSantosh Shilimkar * 139426f09e9bSSantosh Shilimkar * RETURNS: 139526f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 139626f09e9bSSantosh Shilimkar */ 139726f09e9bSSantosh Shilimkar void * __init memblock_virt_alloc_try_nid( 139826f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 139926f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 140026f09e9bSSantosh Shilimkar int nid) 140126f09e9bSSantosh Shilimkar { 140226f09e9bSSantosh Shilimkar void *ptr; 140326f09e9bSSantosh Shilimkar 140426f09e9bSSantosh Shilimkar memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", 140526f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 140626f09e9bSSantosh Shilimkar (u64)max_addr, (void *)_RET_IP_); 140726f09e9bSSantosh Shilimkar ptr = memblock_virt_alloc_internal(size, align, 140826f09e9bSSantosh Shilimkar min_addr, max_addr, nid); 140926f09e9bSSantosh Shilimkar if (ptr) 141026f09e9bSSantosh Shilimkar return ptr; 141126f09e9bSSantosh Shilimkar 141226f09e9bSSantosh Shilimkar panic("%s: Failed to allocate %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx\n", 141326f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 141426f09e9bSSantosh Shilimkar (u64)max_addr); 141526f09e9bSSantosh Shilimkar return NULL; 141626f09e9bSSantosh Shilimkar } 141726f09e9bSSantosh Shilimkar 141826f09e9bSSantosh Shilimkar /** 141926f09e9bSSantosh Shilimkar * __memblock_free_early - free boot memory block 142026f09e9bSSantosh Shilimkar * @base: phys starting address of the boot memory block 142126f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 142226f09e9bSSantosh Shilimkar * 142326f09e9bSSantosh Shilimkar * Free boot memory block previously allocated by memblock_virt_alloc_xx() API. 142426f09e9bSSantosh Shilimkar * The freeing memory will not be released to the buddy allocator. 142526f09e9bSSantosh Shilimkar */ 142626f09e9bSSantosh Shilimkar void __init __memblock_free_early(phys_addr_t base, phys_addr_t size) 142726f09e9bSSantosh Shilimkar { 142826f09e9bSSantosh Shilimkar memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", 142926f09e9bSSantosh Shilimkar __func__, (u64)base, (u64)base + size - 1, 143026f09e9bSSantosh Shilimkar (void *)_RET_IP_); 14319099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 1432f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, base, size); 143326f09e9bSSantosh Shilimkar } 143426f09e9bSSantosh Shilimkar 143526f09e9bSSantosh Shilimkar /* 143626f09e9bSSantosh Shilimkar * __memblock_free_late - free bootmem block pages directly to buddy allocator 143726f09e9bSSantosh Shilimkar * @addr: phys starting address of the boot memory block 143826f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 143926f09e9bSSantosh Shilimkar * 144026f09e9bSSantosh Shilimkar * This is only useful when the bootmem allocator has already been torn 144126f09e9bSSantosh Shilimkar * down, but we are still initializing the system. Pages are released directly 144226f09e9bSSantosh Shilimkar * to the buddy allocator, no bootmem metadata is updated because it is gone. 144326f09e9bSSantosh Shilimkar */ 144426f09e9bSSantosh Shilimkar void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) 144526f09e9bSSantosh Shilimkar { 144626f09e9bSSantosh Shilimkar u64 cursor, end; 144726f09e9bSSantosh Shilimkar 144826f09e9bSSantosh Shilimkar memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", 144926f09e9bSSantosh Shilimkar __func__, (u64)base, (u64)base + size - 1, 145026f09e9bSSantosh Shilimkar (void *)_RET_IP_); 14519099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 145226f09e9bSSantosh Shilimkar cursor = PFN_UP(base); 145326f09e9bSSantosh Shilimkar end = PFN_DOWN(base + size); 145426f09e9bSSantosh Shilimkar 145526f09e9bSSantosh Shilimkar for (; cursor < end; cursor++) { 1456d70ddd7aSMel Gorman __free_pages_bootmem(pfn_to_page(cursor), cursor, 0); 145726f09e9bSSantosh Shilimkar totalram_pages++; 145826f09e9bSSantosh Shilimkar } 145926f09e9bSSantosh Shilimkar } 14609d1e2492SBenjamin Herrenschmidt 14619d1e2492SBenjamin Herrenschmidt /* 14629d1e2492SBenjamin Herrenschmidt * Remaining API functions 14639d1e2492SBenjamin Herrenschmidt */ 14649d1e2492SBenjamin Herrenschmidt 14651f1ffb8aSDavid Gibson phys_addr_t __init_memblock memblock_phys_mem_size(void) 146695f72d1eSYinghai Lu { 14671440c4e2STejun Heo return memblock.memory.total_size; 146895f72d1eSYinghai Lu } 146995f72d1eSYinghai Lu 14708907de5dSSrikar Dronamraju phys_addr_t __init_memblock memblock_reserved_size(void) 14718907de5dSSrikar Dronamraju { 14728907de5dSSrikar Dronamraju return memblock.reserved.total_size; 14738907de5dSSrikar Dronamraju } 14748907de5dSSrikar Dronamraju 1475595ad9afSYinghai Lu phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) 1476595ad9afSYinghai Lu { 1477595ad9afSYinghai Lu unsigned long pages = 0; 1478595ad9afSYinghai Lu struct memblock_region *r; 1479595ad9afSYinghai Lu unsigned long start_pfn, end_pfn; 1480595ad9afSYinghai Lu 1481595ad9afSYinghai Lu for_each_memblock(memory, r) { 1482595ad9afSYinghai Lu start_pfn = memblock_region_memory_base_pfn(r); 1483595ad9afSYinghai Lu end_pfn = memblock_region_memory_end_pfn(r); 1484595ad9afSYinghai Lu start_pfn = min_t(unsigned long, start_pfn, limit_pfn); 1485595ad9afSYinghai Lu end_pfn = min_t(unsigned long, end_pfn, limit_pfn); 1486595ad9afSYinghai Lu pages += end_pfn - start_pfn; 1487595ad9afSYinghai Lu } 1488595ad9afSYinghai Lu 148916763230SFabian Frederick return PFN_PHYS(pages); 1490595ad9afSYinghai Lu } 1491595ad9afSYinghai Lu 14920a93ebefSSam Ravnborg /* lowest address */ 14930a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 14940a93ebefSSam Ravnborg { 14950a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 14960a93ebefSSam Ravnborg } 14970a93ebefSSam Ravnborg 149810d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 149995f72d1eSYinghai Lu { 150095f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 150195f72d1eSYinghai Lu 1502e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 150395f72d1eSYinghai Lu } 150495f72d1eSYinghai Lu 1505a571d4ebSDennis Chen static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit) 150695f72d1eSYinghai Lu { 1507c0ce8fefSTejun Heo phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; 1508136199f0SEmil Medve struct memblock_region *r; 150995f72d1eSYinghai Lu 1510a571d4ebSDennis Chen /* 1511a571d4ebSDennis Chen * translate the memory @limit size into the max address within one of 1512a571d4ebSDennis Chen * the memory memblock regions, if the @limit exceeds the total size 1513a571d4ebSDennis Chen * of those regions, max_addr will keep original value ULLONG_MAX 1514a571d4ebSDennis Chen */ 1515136199f0SEmil Medve for_each_memblock(memory, r) { 1516c0ce8fefSTejun Heo if (limit <= r->size) { 1517c0ce8fefSTejun Heo max_addr = r->base + limit; 151895f72d1eSYinghai Lu break; 151995f72d1eSYinghai Lu } 1520c0ce8fefSTejun Heo limit -= r->size; 152195f72d1eSYinghai Lu } 1522c0ce8fefSTejun Heo 1523a571d4ebSDennis Chen return max_addr; 1524a571d4ebSDennis Chen } 1525a571d4ebSDennis Chen 1526a571d4ebSDennis Chen void __init memblock_enforce_memory_limit(phys_addr_t limit) 1527a571d4ebSDennis Chen { 1528a571d4ebSDennis Chen phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; 1529a571d4ebSDennis Chen 1530a571d4ebSDennis Chen if (!limit) 1531a571d4ebSDennis Chen return; 1532a571d4ebSDennis Chen 1533a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1534a571d4ebSDennis Chen 1535a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 1536a571d4ebSDennis Chen if (max_addr == (phys_addr_t)ULLONG_MAX) 1537a571d4ebSDennis Chen return; 1538a571d4ebSDennis Chen 1539c0ce8fefSTejun Heo /* truncate both memory and reserved regions */ 1540f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.memory, max_addr, 1541f1af9d3aSPhilipp Hachtmann (phys_addr_t)ULLONG_MAX); 1542f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, max_addr, 1543f1af9d3aSPhilipp Hachtmann (phys_addr_t)ULLONG_MAX); 154495f72d1eSYinghai Lu } 154595f72d1eSYinghai Lu 1546*c9ca9b4eSAKASHI Takahiro void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size) 1547*c9ca9b4eSAKASHI Takahiro { 1548*c9ca9b4eSAKASHI Takahiro int start_rgn, end_rgn; 1549*c9ca9b4eSAKASHI Takahiro int i, ret; 1550*c9ca9b4eSAKASHI Takahiro 1551*c9ca9b4eSAKASHI Takahiro if (!size) 1552*c9ca9b4eSAKASHI Takahiro return; 1553*c9ca9b4eSAKASHI Takahiro 1554*c9ca9b4eSAKASHI Takahiro ret = memblock_isolate_range(&memblock.memory, base, size, 1555*c9ca9b4eSAKASHI Takahiro &start_rgn, &end_rgn); 1556*c9ca9b4eSAKASHI Takahiro if (ret) 1557*c9ca9b4eSAKASHI Takahiro return; 1558*c9ca9b4eSAKASHI Takahiro 1559*c9ca9b4eSAKASHI Takahiro /* remove all the MAP regions */ 1560*c9ca9b4eSAKASHI Takahiro for (i = memblock.memory.cnt - 1; i >= end_rgn; i--) 1561*c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1562*c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1563*c9ca9b4eSAKASHI Takahiro 1564*c9ca9b4eSAKASHI Takahiro for (i = start_rgn - 1; i >= 0; i--) 1565*c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1566*c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1567*c9ca9b4eSAKASHI Takahiro 1568*c9ca9b4eSAKASHI Takahiro /* truncate the reserved regions */ 1569*c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 0, base); 1570*c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 1571*c9ca9b4eSAKASHI Takahiro base + size, (phys_addr_t)ULLONG_MAX); 1572*c9ca9b4eSAKASHI Takahiro } 1573*c9ca9b4eSAKASHI Takahiro 1574a571d4ebSDennis Chen void __init memblock_mem_limit_remove_map(phys_addr_t limit) 1575a571d4ebSDennis Chen { 1576a571d4ebSDennis Chen phys_addr_t max_addr; 1577a571d4ebSDennis Chen 1578a571d4ebSDennis Chen if (!limit) 1579a571d4ebSDennis Chen return; 1580a571d4ebSDennis Chen 1581a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1582a571d4ebSDennis Chen 1583a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 1584a571d4ebSDennis Chen if (max_addr == (phys_addr_t)ULLONG_MAX) 1585a571d4ebSDennis Chen return; 1586a571d4ebSDennis Chen 1587*c9ca9b4eSAKASHI Takahiro memblock_cap_memory_range(0, max_addr); 1588a571d4ebSDennis Chen } 1589a571d4ebSDennis Chen 1590cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 159172d4b0b4SBenjamin Herrenschmidt { 159272d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 159372d4b0b4SBenjamin Herrenschmidt 159472d4b0b4SBenjamin Herrenschmidt do { 159572d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 159672d4b0b4SBenjamin Herrenschmidt 159772d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 159872d4b0b4SBenjamin Herrenschmidt right = mid; 159972d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 160072d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 160172d4b0b4SBenjamin Herrenschmidt left = mid + 1; 160272d4b0b4SBenjamin Herrenschmidt else 160372d4b0b4SBenjamin Herrenschmidt return mid; 160472d4b0b4SBenjamin Herrenschmidt } while (left < right); 160572d4b0b4SBenjamin Herrenschmidt return -1; 160672d4b0b4SBenjamin Herrenschmidt } 160772d4b0b4SBenjamin Herrenschmidt 1608b4ad0c7eSYaowei Bai bool __init memblock_is_reserved(phys_addr_t addr) 160995f72d1eSYinghai Lu { 161072d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 161195f72d1eSYinghai Lu } 161272d4b0b4SBenjamin Herrenschmidt 1613b4ad0c7eSYaowei Bai bool __init_memblock memblock_is_memory(phys_addr_t addr) 161472d4b0b4SBenjamin Herrenschmidt { 161572d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 161672d4b0b4SBenjamin Herrenschmidt } 161772d4b0b4SBenjamin Herrenschmidt 1618bf3d3cc5SArd Biesheuvel int __init_memblock memblock_is_map_memory(phys_addr_t addr) 1619bf3d3cc5SArd Biesheuvel { 1620bf3d3cc5SArd Biesheuvel int i = memblock_search(&memblock.memory, addr); 1621bf3d3cc5SArd Biesheuvel 1622bf3d3cc5SArd Biesheuvel if (i == -1) 1623bf3d3cc5SArd Biesheuvel return false; 1624bf3d3cc5SArd Biesheuvel return !memblock_is_nomap(&memblock.memory.regions[i]); 1625bf3d3cc5SArd Biesheuvel } 1626bf3d3cc5SArd Biesheuvel 1627e76b63f8SYinghai Lu #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 1628e76b63f8SYinghai Lu int __init_memblock memblock_search_pfn_nid(unsigned long pfn, 1629e76b63f8SYinghai Lu unsigned long *start_pfn, unsigned long *end_pfn) 1630e76b63f8SYinghai Lu { 1631e76b63f8SYinghai Lu struct memblock_type *type = &memblock.memory; 163216763230SFabian Frederick int mid = memblock_search(type, PFN_PHYS(pfn)); 1633e76b63f8SYinghai Lu 1634e76b63f8SYinghai Lu if (mid == -1) 1635e76b63f8SYinghai Lu return -1; 1636e76b63f8SYinghai Lu 1637f7e2f7e8SFabian Frederick *start_pfn = PFN_DOWN(type->regions[mid].base); 1638f7e2f7e8SFabian Frederick *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); 1639e76b63f8SYinghai Lu 1640e76b63f8SYinghai Lu return type->regions[mid].nid; 1641e76b63f8SYinghai Lu } 1642e76b63f8SYinghai Lu #endif 1643e76b63f8SYinghai Lu 1644eab30949SStephen Boyd /** 1645eab30949SStephen Boyd * memblock_is_region_memory - check if a region is a subset of memory 1646eab30949SStephen Boyd * @base: base of region to check 1647eab30949SStephen Boyd * @size: size of region to check 1648eab30949SStephen Boyd * 1649eab30949SStephen Boyd * Check if the region [@base, @base+@size) is a subset of a memory block. 1650eab30949SStephen Boyd * 1651eab30949SStephen Boyd * RETURNS: 1652eab30949SStephen Boyd * 0 if false, non-zero if true 1653eab30949SStephen Boyd */ 16543661ca66SYinghai Lu int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 165572d4b0b4SBenjamin Herrenschmidt { 1656abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 1657eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 165872d4b0b4SBenjamin Herrenschmidt 165972d4b0b4SBenjamin Herrenschmidt if (idx == -1) 166095f72d1eSYinghai Lu return 0; 1661ef415ef4SWei Yang return (memblock.memory.regions[idx].base + 1662eb18f1b5STejun Heo memblock.memory.regions[idx].size) >= end; 166395f72d1eSYinghai Lu } 166495f72d1eSYinghai Lu 1665eab30949SStephen Boyd /** 1666eab30949SStephen Boyd * memblock_is_region_reserved - check if a region intersects reserved memory 1667eab30949SStephen Boyd * @base: base of region to check 1668eab30949SStephen Boyd * @size: size of region to check 1669eab30949SStephen Boyd * 1670eab30949SStephen Boyd * Check if the region [@base, @base+@size) intersects a reserved memory block. 1671eab30949SStephen Boyd * 1672eab30949SStephen Boyd * RETURNS: 1673c5c5c9d1STang Chen * True if they intersect, false if not. 1674eab30949SStephen Boyd */ 1675c5c5c9d1STang Chen bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 167695f72d1eSYinghai Lu { 1677eb18f1b5STejun Heo memblock_cap_size(base, &size); 1678c5c5c9d1STang Chen return memblock_overlaps_region(&memblock.reserved, base, size); 167995f72d1eSYinghai Lu } 168095f72d1eSYinghai Lu 16816ede1fd3SYinghai Lu void __init_memblock memblock_trim_memory(phys_addr_t align) 16826ede1fd3SYinghai Lu { 16836ede1fd3SYinghai Lu phys_addr_t start, end, orig_start, orig_end; 1684136199f0SEmil Medve struct memblock_region *r; 16856ede1fd3SYinghai Lu 1686136199f0SEmil Medve for_each_memblock(memory, r) { 1687136199f0SEmil Medve orig_start = r->base; 1688136199f0SEmil Medve orig_end = r->base + r->size; 16896ede1fd3SYinghai Lu start = round_up(orig_start, align); 16906ede1fd3SYinghai Lu end = round_down(orig_end, align); 16916ede1fd3SYinghai Lu 16926ede1fd3SYinghai Lu if (start == orig_start && end == orig_end) 16936ede1fd3SYinghai Lu continue; 16946ede1fd3SYinghai Lu 16956ede1fd3SYinghai Lu if (start < end) { 1696136199f0SEmil Medve r->base = start; 1697136199f0SEmil Medve r->size = end - start; 16986ede1fd3SYinghai Lu } else { 1699136199f0SEmil Medve memblock_remove_region(&memblock.memory, 1700136199f0SEmil Medve r - memblock.memory.regions); 1701136199f0SEmil Medve r--; 17026ede1fd3SYinghai Lu } 17036ede1fd3SYinghai Lu } 17046ede1fd3SYinghai Lu } 1705e63075a3SBenjamin Herrenschmidt 17063661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 1707e63075a3SBenjamin Herrenschmidt { 1708e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 1709e63075a3SBenjamin Herrenschmidt } 1710e63075a3SBenjamin Herrenschmidt 1711fec51014SLaura Abbott phys_addr_t __init_memblock memblock_get_current_limit(void) 1712fec51014SLaura Abbott { 1713fec51014SLaura Abbott return memblock.current_limit; 1714fec51014SLaura Abbott } 1715fec51014SLaura Abbott 17160262d9c8SHeiko Carstens static void __init_memblock memblock_dump(struct memblock_type *type) 17176ed311b2SBenjamin Herrenschmidt { 17185d63f81cSMiles Chen phys_addr_t base, end, size; 171966a20757STang Chen unsigned long flags; 17208c9c1701SAlexander Kuleshov int idx; 17218c9c1701SAlexander Kuleshov struct memblock_region *rgn; 17226ed311b2SBenjamin Herrenschmidt 17230262d9c8SHeiko Carstens pr_info(" %s.cnt = 0x%lx\n", type->name, type->cnt); 17246ed311b2SBenjamin Herrenschmidt 17258c9c1701SAlexander Kuleshov for_each_memblock_type(type, rgn) { 17267c0caeb8STejun Heo char nid_buf[32] = ""; 17276ed311b2SBenjamin Herrenschmidt 17287c0caeb8STejun Heo base = rgn->base; 17297c0caeb8STejun Heo size = rgn->size; 17305d63f81cSMiles Chen end = base + size - 1; 173166a20757STang Chen flags = rgn->flags; 17327c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 17337c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 17347c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 17357c0caeb8STejun Heo memblock_get_region_node(rgn)); 17367c0caeb8STejun Heo #endif 17375d63f81cSMiles Chen pr_info(" %s[%#x]\t[%pa-%pa], %pa bytes%s flags: %#lx\n", 17380262d9c8SHeiko Carstens type->name, idx, &base, &end, &size, nid_buf, flags); 17396ed311b2SBenjamin Herrenschmidt } 17406ed311b2SBenjamin Herrenschmidt } 17416ed311b2SBenjamin Herrenschmidt 17424ff7b82fSTejun Heo void __init_memblock __memblock_dump_all(void) 17436ed311b2SBenjamin Herrenschmidt { 17446ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 17455d63f81cSMiles Chen pr_info(" memory size = %pa reserved size = %pa\n", 17465d63f81cSMiles Chen &memblock.memory.total_size, 17475d63f81cSMiles Chen &memblock.reserved.total_size); 17486ed311b2SBenjamin Herrenschmidt 17490262d9c8SHeiko Carstens memblock_dump(&memblock.memory); 17500262d9c8SHeiko Carstens memblock_dump(&memblock.reserved); 1751409efd4cSHeiko Carstens #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 17520262d9c8SHeiko Carstens memblock_dump(&memblock.physmem); 1753409efd4cSHeiko Carstens #endif 17546ed311b2SBenjamin Herrenschmidt } 17556ed311b2SBenjamin Herrenschmidt 17561aadc056STejun Heo void __init memblock_allow_resize(void) 17576ed311b2SBenjamin Herrenschmidt { 1758142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 17596ed311b2SBenjamin Herrenschmidt } 17606ed311b2SBenjamin Herrenschmidt 17616ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 17626ed311b2SBenjamin Herrenschmidt { 17636ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 17646ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 17656ed311b2SBenjamin Herrenschmidt return 0; 17666ed311b2SBenjamin Herrenschmidt } 17676ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 17686ed311b2SBenjamin Herrenschmidt 1769c378ddd5STejun Heo #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) 17706d03b885SBenjamin Herrenschmidt 17716d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 17726d03b885SBenjamin Herrenschmidt { 17736d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 17746d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 17756d03b885SBenjamin Herrenschmidt int i; 17765d63f81cSMiles Chen phys_addr_t end; 17776d03b885SBenjamin Herrenschmidt 17786d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 17796d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 17805d63f81cSMiles Chen end = reg->base + reg->size - 1; 17816d03b885SBenjamin Herrenschmidt 17825d63f81cSMiles Chen seq_printf(m, "%4d: ", i); 17835d63f81cSMiles Chen seq_printf(m, "%pa..%pa\n", ®->base, &end); 17846d03b885SBenjamin Herrenschmidt } 17856d03b885SBenjamin Herrenschmidt return 0; 17866d03b885SBenjamin Herrenschmidt } 17876d03b885SBenjamin Herrenschmidt 17886d03b885SBenjamin Herrenschmidt static int memblock_debug_open(struct inode *inode, struct file *file) 17896d03b885SBenjamin Herrenschmidt { 17906d03b885SBenjamin Herrenschmidt return single_open(file, memblock_debug_show, inode->i_private); 17916d03b885SBenjamin Herrenschmidt } 17926d03b885SBenjamin Herrenschmidt 17936d03b885SBenjamin Herrenschmidt static const struct file_operations memblock_debug_fops = { 17946d03b885SBenjamin Herrenschmidt .open = memblock_debug_open, 17956d03b885SBenjamin Herrenschmidt .read = seq_read, 17966d03b885SBenjamin Herrenschmidt .llseek = seq_lseek, 17976d03b885SBenjamin Herrenschmidt .release = single_release, 17986d03b885SBenjamin Herrenschmidt }; 17996d03b885SBenjamin Herrenschmidt 18006d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 18016d03b885SBenjamin Herrenschmidt { 18026d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 18036d03b885SBenjamin Herrenschmidt if (!root) 18046d03b885SBenjamin Herrenschmidt return -ENXIO; 18056d03b885SBenjamin Herrenschmidt debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); 18066d03b885SBenjamin Herrenschmidt debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); 180770210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 180870210ed9SPhilipp Hachtmann debugfs_create_file("physmem", S_IRUGO, root, &memblock.physmem, &memblock_debug_fops); 180970210ed9SPhilipp Hachtmann #endif 18106d03b885SBenjamin Herrenschmidt 18116d03b885SBenjamin Herrenschmidt return 0; 18126d03b885SBenjamin Herrenschmidt } 18136d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 18146d03b885SBenjamin Herrenschmidt 18156d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 1816