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; 57a3f5bafcSTony Luck static bool system_has_some_mirror __initdata_memblock = false; 581aadc056STejun Heo static int memblock_can_resize __initdata_memblock; 59181eb394SGavin Shan static int memblock_memory_in_slab __initdata_memblock = 0; 60181eb394SGavin Shan static int memblock_reserved_in_slab __initdata_memblock = 0; 6195f72d1eSYinghai Lu 62a3f5bafcSTony Luck ulong __init_memblock choose_memblock_flags(void) 63a3f5bafcSTony Luck { 64a3f5bafcSTony Luck return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; 65a3f5bafcSTony Luck } 66a3f5bafcSTony Luck 67eb18f1b5STejun Heo /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ 68eb18f1b5STejun Heo static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) 69eb18f1b5STejun Heo { 70eb18f1b5STejun Heo return *size = min(*size, (phys_addr_t)ULLONG_MAX - base); 71eb18f1b5STejun Heo } 72eb18f1b5STejun Heo 736ed311b2SBenjamin Herrenschmidt /* 746ed311b2SBenjamin Herrenschmidt * Address comparison utilities 756ed311b2SBenjamin Herrenschmidt */ 7610d06439SYinghai Lu static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, 772898cc4cSBenjamin Herrenschmidt phys_addr_t base2, phys_addr_t size2) 7895f72d1eSYinghai Lu { 7995f72d1eSYinghai Lu return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); 8095f72d1eSYinghai Lu } 8195f72d1eSYinghai Lu 8295cf82ecSTang Chen bool __init_memblock memblock_overlaps_region(struct memblock_type *type, 832d7d3eb2SH Hartley Sweeten phys_addr_t base, phys_addr_t size) 846ed311b2SBenjamin Herrenschmidt { 856ed311b2SBenjamin Herrenschmidt unsigned long i; 866ed311b2SBenjamin Herrenschmidt 87f14516fbSAlexander Kuleshov for (i = 0; i < type->cnt; i++) 88f14516fbSAlexander Kuleshov if (memblock_addrs_overlap(base, size, type->regions[i].base, 89f14516fbSAlexander Kuleshov type->regions[i].size)) 906ed311b2SBenjamin Herrenschmidt break; 91c5c5c9d1STang Chen return i < type->cnt; 926ed311b2SBenjamin Herrenschmidt } 936ed311b2SBenjamin Herrenschmidt 9479442ed1STang Chen /* 9579442ed1STang Chen * __memblock_find_range_bottom_up - find free area utility in bottom-up 9679442ed1STang Chen * @start: start of candidate range 9779442ed1STang Chen * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 9879442ed1STang Chen * @size: size of free area to find 9979442ed1STang Chen * @align: alignment of free area to find 100b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 101fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 10279442ed1STang Chen * 10379442ed1STang Chen * Utility called from memblock_find_in_range_node(), find free area bottom-up. 10479442ed1STang Chen * 10579442ed1STang Chen * RETURNS: 10679442ed1STang Chen * Found address on success, 0 on failure. 10779442ed1STang Chen */ 10879442ed1STang Chen static phys_addr_t __init_memblock 10979442ed1STang Chen __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, 110fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 111fc6daaf9STony Luck ulong flags) 11279442ed1STang Chen { 11379442ed1STang Chen phys_addr_t this_start, this_end, cand; 11479442ed1STang Chen u64 i; 11579442ed1STang Chen 116fc6daaf9STony Luck for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { 11779442ed1STang Chen this_start = clamp(this_start, start, end); 11879442ed1STang Chen this_end = clamp(this_end, start, end); 11979442ed1STang Chen 12079442ed1STang Chen cand = round_up(this_start, align); 12179442ed1STang Chen if (cand < this_end && this_end - cand >= size) 12279442ed1STang Chen return cand; 12379442ed1STang Chen } 12479442ed1STang Chen 12579442ed1STang Chen return 0; 12679442ed1STang Chen } 12779442ed1STang Chen 1287bd0b0f0STejun Heo /** 1291402899eSTang Chen * __memblock_find_range_top_down - find free area utility, in top-down 1301402899eSTang Chen * @start: start of candidate range 1311402899eSTang Chen * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 1321402899eSTang Chen * @size: size of free area to find 1331402899eSTang Chen * @align: alignment of free area to find 134b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 135fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1361402899eSTang Chen * 1371402899eSTang Chen * Utility called from memblock_find_in_range_node(), find free area top-down. 1381402899eSTang Chen * 1391402899eSTang Chen * RETURNS: 14079442ed1STang Chen * Found address on success, 0 on failure. 1411402899eSTang Chen */ 1421402899eSTang Chen static phys_addr_t __init_memblock 1431402899eSTang Chen __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, 144fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 145fc6daaf9STony Luck ulong flags) 1461402899eSTang Chen { 1471402899eSTang Chen phys_addr_t this_start, this_end, cand; 1481402899eSTang Chen u64 i; 1491402899eSTang Chen 150fc6daaf9STony Luck for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, 151fc6daaf9STony Luck NULL) { 1521402899eSTang Chen this_start = clamp(this_start, start, end); 1531402899eSTang Chen this_end = clamp(this_end, start, end); 1541402899eSTang Chen 1551402899eSTang Chen if (this_end < size) 1561402899eSTang Chen continue; 1571402899eSTang Chen 1581402899eSTang Chen cand = round_down(this_end - size, align); 1591402899eSTang Chen if (cand >= this_start) 1601402899eSTang Chen return cand; 1611402899eSTang Chen } 1621402899eSTang Chen 1631402899eSTang Chen return 0; 1641402899eSTang Chen } 1651402899eSTang Chen 1661402899eSTang Chen /** 1677bd0b0f0STejun Heo * memblock_find_in_range_node - find free area in given range and node 1687bd0b0f0STejun Heo * @size: size of free area to find 1697bd0b0f0STejun Heo * @align: alignment of free area to find 17087029ee9SGrygorii Strashko * @start: start of candidate range 17187029ee9SGrygorii Strashko * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 172b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 173fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1747bd0b0f0STejun Heo * 1757bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range and node. 1767bd0b0f0STejun Heo * 17779442ed1STang Chen * When allocation direction is bottom-up, the @start should be greater 17879442ed1STang Chen * than the end of the kernel image. Otherwise, it will be trimmed. The 17979442ed1STang Chen * reason is that we want the bottom-up allocation just near the kernel 18079442ed1STang Chen * image so it is highly likely that the allocated memory and the kernel 18179442ed1STang Chen * will reside in the same node. 18279442ed1STang Chen * 18379442ed1STang Chen * If bottom-up allocation failed, will try to allocate memory top-down. 18479442ed1STang Chen * 1857bd0b0f0STejun Heo * RETURNS: 18679442ed1STang Chen * Found address on success, 0 on failure. 1876ed311b2SBenjamin Herrenschmidt */ 18887029ee9SGrygorii Strashko phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, 18987029ee9SGrygorii Strashko phys_addr_t align, phys_addr_t start, 190fc6daaf9STony Luck phys_addr_t end, int nid, ulong flags) 191f7210e6cSTang Chen { 1920cfb8f0cSTang Chen phys_addr_t kernel_end, ret; 19379442ed1STang Chen 194f7210e6cSTang Chen /* pump up @end */ 195f7210e6cSTang Chen if (end == MEMBLOCK_ALLOC_ACCESSIBLE) 196f7210e6cSTang Chen end = memblock.current_limit; 197f7210e6cSTang Chen 198f7210e6cSTang Chen /* avoid allocating the first page */ 199f7210e6cSTang Chen start = max_t(phys_addr_t, start, PAGE_SIZE); 200f7210e6cSTang Chen end = max(start, end); 20179442ed1STang Chen kernel_end = __pa_symbol(_end); 20279442ed1STang Chen 20379442ed1STang Chen /* 20479442ed1STang Chen * try bottom-up allocation only when bottom-up mode 20579442ed1STang Chen * is set and @end is above the kernel image. 20679442ed1STang Chen */ 20779442ed1STang Chen if (memblock_bottom_up() && end > kernel_end) { 20879442ed1STang Chen phys_addr_t bottom_up_start; 20979442ed1STang Chen 21079442ed1STang Chen /* make sure we will allocate above the kernel */ 21179442ed1STang Chen bottom_up_start = max(start, kernel_end); 21279442ed1STang Chen 21379442ed1STang Chen /* ok, try bottom-up allocation first */ 21479442ed1STang Chen ret = __memblock_find_range_bottom_up(bottom_up_start, end, 215fc6daaf9STony Luck size, align, nid, flags); 21679442ed1STang Chen if (ret) 21779442ed1STang Chen return ret; 21879442ed1STang Chen 21979442ed1STang Chen /* 22079442ed1STang Chen * we always limit bottom-up allocation above the kernel, 22179442ed1STang Chen * but top-down allocation doesn't have the limit, so 22279442ed1STang Chen * retrying top-down allocation may succeed when bottom-up 22379442ed1STang Chen * allocation failed. 22479442ed1STang Chen * 22579442ed1STang Chen * bottom-up allocation is expected to be fail very rarely, 22679442ed1STang Chen * so we use WARN_ONCE() here to see the stack trace if 22779442ed1STang Chen * fail happens. 22879442ed1STang Chen */ 229756a025fSJoe Perches WARN_ONCE(1, "memblock: bottom-up allocation failed, memory hotunplug may be affected\n"); 23079442ed1STang Chen } 231f7210e6cSTang Chen 232fc6daaf9STony Luck return __memblock_find_range_top_down(start, end, size, align, nid, 233fc6daaf9STony Luck flags); 234f7210e6cSTang Chen } 2356ed311b2SBenjamin Herrenschmidt 2367bd0b0f0STejun Heo /** 2377bd0b0f0STejun Heo * memblock_find_in_range - find free area in given range 2387bd0b0f0STejun Heo * @start: start of candidate range 2397bd0b0f0STejun Heo * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 2407bd0b0f0STejun Heo * @size: size of free area to find 2417bd0b0f0STejun Heo * @align: alignment of free area to find 2427bd0b0f0STejun Heo * 2437bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range. 2447bd0b0f0STejun Heo * 2457bd0b0f0STejun Heo * RETURNS: 24679442ed1STang Chen * Found address on success, 0 on failure. 2477bd0b0f0STejun Heo */ 2487bd0b0f0STejun Heo phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, 2497bd0b0f0STejun Heo phys_addr_t end, phys_addr_t size, 2507bd0b0f0STejun Heo phys_addr_t align) 2517bd0b0f0STejun Heo { 252a3f5bafcSTony Luck phys_addr_t ret; 253a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 254a3f5bafcSTony Luck 255a3f5bafcSTony Luck again: 256a3f5bafcSTony Luck ret = memblock_find_in_range_node(size, align, start, end, 257a3f5bafcSTony Luck NUMA_NO_NODE, flags); 258a3f5bafcSTony Luck 259a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 260a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 261a3f5bafcSTony Luck &size); 262a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 263a3f5bafcSTony Luck goto again; 264a3f5bafcSTony Luck } 265a3f5bafcSTony Luck 266a3f5bafcSTony Luck return ret; 2677bd0b0f0STejun Heo } 2687bd0b0f0STejun Heo 26910d06439SYinghai Lu static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) 27095f72d1eSYinghai Lu { 2711440c4e2STejun Heo type->total_size -= type->regions[r].size; 2727c0caeb8STejun Heo memmove(&type->regions[r], &type->regions[r + 1], 2737c0caeb8STejun Heo (type->cnt - (r + 1)) * sizeof(type->regions[r])); 274e3239ff9SBenjamin Herrenschmidt type->cnt--; 27595f72d1eSYinghai Lu 2768f7a6605SBenjamin Herrenschmidt /* Special case for empty arrays */ 2778f7a6605SBenjamin Herrenschmidt if (type->cnt == 0) { 2781440c4e2STejun Heo WARN_ON(type->total_size != 0); 2798f7a6605SBenjamin Herrenschmidt type->cnt = 1; 2808f7a6605SBenjamin Herrenschmidt type->regions[0].base = 0; 2818f7a6605SBenjamin Herrenschmidt type->regions[0].size = 0; 28266a20757STang Chen type->regions[0].flags = 0; 2837c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 2848f7a6605SBenjamin Herrenschmidt } 28595f72d1eSYinghai Lu } 28695f72d1eSYinghai Lu 287354f17e1SPhilipp Hachtmann #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK 2883010f876SPavel Tatashin /** 2893010f876SPavel Tatashin * Discard memory and reserved arrays if they were allocated 2903010f876SPavel Tatashin */ 2913010f876SPavel Tatashin void __init memblock_discard(void) 29229f67386SYinghai Lu { 2933010f876SPavel Tatashin phys_addr_t addr, size; 29429f67386SYinghai Lu 2953010f876SPavel Tatashin if (memblock.reserved.regions != memblock_reserved_init_regions) { 2963010f876SPavel Tatashin addr = __pa(memblock.reserved.regions); 2973010f876SPavel Tatashin size = PAGE_ALIGN(sizeof(struct memblock_region) * 29829f67386SYinghai Lu memblock.reserved.max); 2993010f876SPavel Tatashin __memblock_free_late(addr, size); 30029f67386SYinghai Lu } 30129f67386SYinghai Lu 30291b540f9SPavel Tatashin if (memblock.memory.regions != memblock_memory_init_regions) { 3033010f876SPavel Tatashin addr = __pa(memblock.memory.regions); 3043010f876SPavel Tatashin size = PAGE_ALIGN(sizeof(struct memblock_region) * 3055e270e25SPhilipp Hachtmann memblock.memory.max); 3063010f876SPavel Tatashin __memblock_free_late(addr, size); 3075e270e25SPhilipp Hachtmann } 3083010f876SPavel Tatashin } 3095e270e25SPhilipp Hachtmann #endif 3105e270e25SPhilipp Hachtmann 31148c3b583SGreg Pearson /** 31248c3b583SGreg Pearson * memblock_double_array - double the size of the memblock regions array 31348c3b583SGreg Pearson * @type: memblock type of the regions array being doubled 31448c3b583SGreg Pearson * @new_area_start: starting address of memory range to avoid overlap with 31548c3b583SGreg Pearson * @new_area_size: size of memory range to avoid overlap with 31648c3b583SGreg Pearson * 31748c3b583SGreg Pearson * Double the size of the @type regions array. If memblock is being used to 31848c3b583SGreg Pearson * allocate memory for a new reserved regions array and there is a previously 31948c3b583SGreg Pearson * allocated memory range [@new_area_start,@new_area_start+@new_area_size] 32048c3b583SGreg Pearson * waiting to be reserved, ensure the memory used by the new array does 32148c3b583SGreg Pearson * not overlap. 32248c3b583SGreg Pearson * 32348c3b583SGreg Pearson * RETURNS: 32448c3b583SGreg Pearson * 0 on success, -1 on failure. 32548c3b583SGreg Pearson */ 32648c3b583SGreg Pearson static int __init_memblock memblock_double_array(struct memblock_type *type, 32748c3b583SGreg Pearson phys_addr_t new_area_start, 32848c3b583SGreg Pearson phys_addr_t new_area_size) 329142b45a7SBenjamin Herrenschmidt { 330142b45a7SBenjamin Herrenschmidt struct memblock_region *new_array, *old_array; 33129f67386SYinghai Lu phys_addr_t old_alloc_size, new_alloc_size; 332142b45a7SBenjamin Herrenschmidt phys_addr_t old_size, new_size, addr; 333142b45a7SBenjamin Herrenschmidt int use_slab = slab_is_available(); 334181eb394SGavin Shan int *in_slab; 335142b45a7SBenjamin Herrenschmidt 336142b45a7SBenjamin Herrenschmidt /* We don't allow resizing until we know about the reserved regions 337142b45a7SBenjamin Herrenschmidt * of memory that aren't suitable for allocation 338142b45a7SBenjamin Herrenschmidt */ 339142b45a7SBenjamin Herrenschmidt if (!memblock_can_resize) 340142b45a7SBenjamin Herrenschmidt return -1; 341142b45a7SBenjamin Herrenschmidt 342142b45a7SBenjamin Herrenschmidt /* Calculate new doubled size */ 343142b45a7SBenjamin Herrenschmidt old_size = type->max * sizeof(struct memblock_region); 344142b45a7SBenjamin Herrenschmidt new_size = old_size << 1; 34529f67386SYinghai Lu /* 34629f67386SYinghai Lu * We need to allocated new one align to PAGE_SIZE, 34729f67386SYinghai Lu * so we can free them completely later. 34829f67386SYinghai Lu */ 34929f67386SYinghai Lu old_alloc_size = PAGE_ALIGN(old_size); 35029f67386SYinghai Lu new_alloc_size = PAGE_ALIGN(new_size); 351142b45a7SBenjamin Herrenschmidt 352181eb394SGavin Shan /* Retrieve the slab flag */ 353181eb394SGavin Shan if (type == &memblock.memory) 354181eb394SGavin Shan in_slab = &memblock_memory_in_slab; 355181eb394SGavin Shan else 356181eb394SGavin Shan in_slab = &memblock_reserved_in_slab; 357181eb394SGavin Shan 358142b45a7SBenjamin Herrenschmidt /* Try to find some space for it. 359142b45a7SBenjamin Herrenschmidt * 360142b45a7SBenjamin Herrenschmidt * WARNING: We assume that either slab_is_available() and we use it or 361fd07383bSAndrew Morton * we use MEMBLOCK for allocations. That means that this is unsafe to 362fd07383bSAndrew Morton * use when bootmem is currently active (unless bootmem itself is 363fd07383bSAndrew Morton * implemented on top of MEMBLOCK which isn't the case yet) 364142b45a7SBenjamin Herrenschmidt * 365142b45a7SBenjamin Herrenschmidt * This should however not be an issue for now, as we currently only 366fd07383bSAndrew Morton * call into MEMBLOCK while it's still active, or much later when slab 367fd07383bSAndrew Morton * is active for memory hotplug operations 368142b45a7SBenjamin Herrenschmidt */ 369142b45a7SBenjamin Herrenschmidt if (use_slab) { 370142b45a7SBenjamin Herrenschmidt new_array = kmalloc(new_size, GFP_KERNEL); 3711f5026a7STejun Heo addr = new_array ? __pa(new_array) : 0; 3724e2f0775SGavin Shan } else { 37348c3b583SGreg Pearson /* only exclude range when trying to double reserved.regions */ 37448c3b583SGreg Pearson if (type != &memblock.reserved) 37548c3b583SGreg Pearson new_area_start = new_area_size = 0; 37648c3b583SGreg Pearson 37748c3b583SGreg Pearson addr = memblock_find_in_range(new_area_start + new_area_size, 37848c3b583SGreg Pearson memblock.current_limit, 37929f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 38048c3b583SGreg Pearson if (!addr && new_area_size) 38148c3b583SGreg Pearson addr = memblock_find_in_range(0, 38248c3b583SGreg Pearson min(new_area_start, memblock.current_limit), 38329f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 38448c3b583SGreg Pearson 38515674868SSachin Kamat new_array = addr ? __va(addr) : NULL; 3864e2f0775SGavin Shan } 3871f5026a7STejun Heo if (!addr) { 388142b45a7SBenjamin Herrenschmidt pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", 3890262d9c8SHeiko Carstens type->name, type->max, type->max * 2); 390142b45a7SBenjamin Herrenschmidt return -1; 391142b45a7SBenjamin Herrenschmidt } 392142b45a7SBenjamin Herrenschmidt 393fd07383bSAndrew Morton memblock_dbg("memblock: %s is doubled to %ld at [%#010llx-%#010llx]", 3940262d9c8SHeiko Carstens type->name, type->max * 2, (u64)addr, 395fd07383bSAndrew Morton (u64)addr + new_size - 1); 396ea9e4376SYinghai Lu 397fd07383bSAndrew Morton /* 398fd07383bSAndrew Morton * Found space, we now need to move the array over before we add the 399fd07383bSAndrew Morton * reserved region since it may be our reserved array itself that is 400fd07383bSAndrew Morton * full. 401142b45a7SBenjamin Herrenschmidt */ 402142b45a7SBenjamin Herrenschmidt memcpy(new_array, type->regions, old_size); 403142b45a7SBenjamin Herrenschmidt memset(new_array + type->max, 0, old_size); 404142b45a7SBenjamin Herrenschmidt old_array = type->regions; 405142b45a7SBenjamin Herrenschmidt type->regions = new_array; 406142b45a7SBenjamin Herrenschmidt type->max <<= 1; 407142b45a7SBenjamin Herrenschmidt 408fd07383bSAndrew Morton /* Free old array. We needn't free it if the array is the static one */ 409181eb394SGavin Shan if (*in_slab) 410181eb394SGavin Shan kfree(old_array); 411181eb394SGavin Shan else if (old_array != memblock_memory_init_regions && 412142b45a7SBenjamin Herrenschmidt old_array != memblock_reserved_init_regions) 41329f67386SYinghai Lu memblock_free(__pa(old_array), old_alloc_size); 414142b45a7SBenjamin Herrenschmidt 415fd07383bSAndrew Morton /* 416fd07383bSAndrew Morton * Reserve the new array if that comes from the memblock. Otherwise, we 417fd07383bSAndrew Morton * needn't do it 418181eb394SGavin Shan */ 419181eb394SGavin Shan if (!use_slab) 42029f67386SYinghai Lu BUG_ON(memblock_reserve(addr, new_alloc_size)); 421181eb394SGavin Shan 422181eb394SGavin Shan /* Update slab flag */ 423181eb394SGavin Shan *in_slab = use_slab; 424181eb394SGavin Shan 425142b45a7SBenjamin Herrenschmidt return 0; 426142b45a7SBenjamin Herrenschmidt } 427142b45a7SBenjamin Herrenschmidt 428784656f9STejun Heo /** 429784656f9STejun Heo * memblock_merge_regions - merge neighboring compatible regions 430784656f9STejun Heo * @type: memblock type to scan 431784656f9STejun Heo * 432784656f9STejun Heo * Scan @type and merge neighboring compatible regions. 433784656f9STejun Heo */ 434784656f9STejun Heo static void __init_memblock memblock_merge_regions(struct memblock_type *type) 435784656f9STejun Heo { 436784656f9STejun Heo int i = 0; 437784656f9STejun Heo 438784656f9STejun Heo /* cnt never goes below 1 */ 439784656f9STejun Heo while (i < type->cnt - 1) { 440784656f9STejun Heo struct memblock_region *this = &type->regions[i]; 441784656f9STejun Heo struct memblock_region *next = &type->regions[i + 1]; 442784656f9STejun Heo 4437c0caeb8STejun Heo if (this->base + this->size != next->base || 4447c0caeb8STejun Heo memblock_get_region_node(this) != 44566a20757STang Chen memblock_get_region_node(next) || 44666a20757STang Chen this->flags != next->flags) { 447784656f9STejun Heo BUG_ON(this->base + this->size > next->base); 448784656f9STejun Heo i++; 449784656f9STejun Heo continue; 450784656f9STejun Heo } 451784656f9STejun Heo 452784656f9STejun Heo this->size += next->size; 453c0232ae8SLin Feng /* move forward from next + 1, index of which is i + 2 */ 454c0232ae8SLin Feng memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); 455784656f9STejun Heo type->cnt--; 456784656f9STejun Heo } 457784656f9STejun Heo } 458784656f9STejun Heo 459784656f9STejun Heo /** 460784656f9STejun Heo * memblock_insert_region - insert new memblock region 461784656f9STejun Heo * @type: memblock type to insert into 462784656f9STejun Heo * @idx: index for the insertion point 463784656f9STejun Heo * @base: base address of the new region 464784656f9STejun Heo * @size: size of the new region 465209ff86dSTang Chen * @nid: node id of the new region 46666a20757STang Chen * @flags: flags of the new region 467784656f9STejun Heo * 468784656f9STejun Heo * Insert new memblock region [@base,@base+@size) into @type at @idx. 469412d0008SAlexander Kuleshov * @type must already have extra room to accommodate the new region. 470784656f9STejun Heo */ 471784656f9STejun Heo static void __init_memblock memblock_insert_region(struct memblock_type *type, 472784656f9STejun Heo int idx, phys_addr_t base, 47366a20757STang Chen phys_addr_t size, 47466a20757STang Chen int nid, unsigned long flags) 475784656f9STejun Heo { 476784656f9STejun Heo struct memblock_region *rgn = &type->regions[idx]; 477784656f9STejun Heo 478784656f9STejun Heo BUG_ON(type->cnt >= type->max); 479784656f9STejun Heo memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); 480784656f9STejun Heo rgn->base = base; 481784656f9STejun Heo rgn->size = size; 48266a20757STang Chen rgn->flags = flags; 4837c0caeb8STejun Heo memblock_set_region_node(rgn, nid); 484784656f9STejun Heo type->cnt++; 4851440c4e2STejun Heo type->total_size += size; 486784656f9STejun Heo } 487784656f9STejun Heo 488784656f9STejun Heo /** 489f1af9d3aSPhilipp Hachtmann * memblock_add_range - add new memblock region 490784656f9STejun Heo * @type: memblock type to add new region into 491784656f9STejun Heo * @base: base address of the new region 492784656f9STejun Heo * @size: size of the new region 4937fb0bc3fSTejun Heo * @nid: nid of the new region 49466a20757STang Chen * @flags: flags of the new region 495784656f9STejun Heo * 496784656f9STejun Heo * Add new memblock region [@base,@base+@size) into @type. The new region 497784656f9STejun Heo * is allowed to overlap with existing ones - overlaps don't affect already 498784656f9STejun Heo * existing regions. @type is guaranteed to be minimal (all neighbouring 499784656f9STejun Heo * compatible regions are merged) after the addition. 500784656f9STejun Heo * 501784656f9STejun Heo * RETURNS: 502784656f9STejun Heo * 0 on success, -errno on failure. 503784656f9STejun Heo */ 504f1af9d3aSPhilipp Hachtmann int __init_memblock memblock_add_range(struct memblock_type *type, 50566a20757STang Chen phys_addr_t base, phys_addr_t size, 50666a20757STang Chen int nid, unsigned long flags) 50795f72d1eSYinghai Lu { 508784656f9STejun Heo bool insert = false; 509eb18f1b5STejun Heo phys_addr_t obase = base; 510eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 5118c9c1701SAlexander Kuleshov int idx, nr_new; 5128c9c1701SAlexander Kuleshov struct memblock_region *rgn; 51395f72d1eSYinghai Lu 514b3dc627cSTejun Heo if (!size) 515b3dc627cSTejun Heo return 0; 516b3dc627cSTejun Heo 517784656f9STejun Heo /* special case for empty array */ 518784656f9STejun Heo if (type->regions[0].size == 0) { 5191440c4e2STejun Heo WARN_ON(type->cnt != 1 || type->total_size); 520784656f9STejun Heo type->regions[0].base = base; 521784656f9STejun Heo type->regions[0].size = size; 52266a20757STang Chen type->regions[0].flags = flags; 5237fb0bc3fSTejun Heo memblock_set_region_node(&type->regions[0], nid); 5241440c4e2STejun Heo type->total_size = size; 525784656f9STejun Heo return 0; 526784656f9STejun Heo } 527784656f9STejun Heo repeat: 528784656f9STejun Heo /* 529784656f9STejun Heo * The following is executed twice. Once with %false @insert and 530784656f9STejun Heo * then with %true. The first counts the number of regions needed 531412d0008SAlexander Kuleshov * to accommodate the new area. The second actually inserts them. 532784656f9STejun Heo */ 533784656f9STejun Heo base = obase; 534784656f9STejun Heo nr_new = 0; 535784656f9STejun Heo 53666e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 537784656f9STejun Heo phys_addr_t rbase = rgn->base; 538784656f9STejun Heo phys_addr_t rend = rbase + rgn->size; 5398f7a6605SBenjamin Herrenschmidt 540784656f9STejun Heo if (rbase >= end) 5418f7a6605SBenjamin Herrenschmidt break; 542784656f9STejun Heo if (rend <= base) 543784656f9STejun Heo continue; 544784656f9STejun Heo /* 545784656f9STejun Heo * @rgn overlaps. If it separates the lower part of new 546784656f9STejun Heo * area, insert that portion. 5478f7a6605SBenjamin Herrenschmidt */ 548784656f9STejun Heo if (rbase > base) { 549c0a29498SWei Yang #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 550c0a29498SWei Yang WARN_ON(nid != memblock_get_region_node(rgn)); 551c0a29498SWei Yang #endif 5524fcab5f4SWei Yang WARN_ON(flags != rgn->flags); 553784656f9STejun Heo nr_new++; 554784656f9STejun Heo if (insert) 5558c9c1701SAlexander Kuleshov memblock_insert_region(type, idx++, base, 55666a20757STang Chen rbase - base, nid, 55766a20757STang Chen flags); 558784656f9STejun Heo } 559784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 560784656f9STejun Heo base = min(rend, end); 5618f7a6605SBenjamin Herrenschmidt } 5628f7a6605SBenjamin Herrenschmidt 563784656f9STejun Heo /* insert the remaining portion */ 564784656f9STejun Heo if (base < end) { 565784656f9STejun Heo nr_new++; 566784656f9STejun Heo if (insert) 5678c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, base, end - base, 56866a20757STang Chen nid, flags); 5698f7a6605SBenjamin Herrenschmidt } 5708f7a6605SBenjamin Herrenschmidt 571ef3cc4dbSnimisolo if (!nr_new) 572ef3cc4dbSnimisolo return 0; 573ef3cc4dbSnimisolo 574784656f9STejun Heo /* 575784656f9STejun Heo * If this was the first round, resize array and repeat for actual 576784656f9STejun Heo * insertions; otherwise, merge and return. 5778f7a6605SBenjamin Herrenschmidt */ 578784656f9STejun Heo if (!insert) { 579784656f9STejun Heo while (type->cnt + nr_new > type->max) 58048c3b583SGreg Pearson if (memblock_double_array(type, obase, size) < 0) 581784656f9STejun Heo return -ENOMEM; 582784656f9STejun Heo insert = true; 583784656f9STejun Heo goto repeat; 58495f72d1eSYinghai Lu } else { 585784656f9STejun Heo memblock_merge_regions(type); 58695f72d1eSYinghai Lu return 0; 58795f72d1eSYinghai Lu } 588784656f9STejun Heo } 58995f72d1eSYinghai Lu 5907fb0bc3fSTejun Heo int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, 5917fb0bc3fSTejun Heo int nid) 5927fb0bc3fSTejun Heo { 593f1af9d3aSPhilipp Hachtmann return memblock_add_range(&memblock.memory, base, size, nid, 0); 5947fb0bc3fSTejun Heo } 5957fb0bc3fSTejun Heo 596f705ac4bSAlexander Kuleshov int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 5976a4055bcSAlexander Kuleshov { 5985d63f81cSMiles Chen phys_addr_t end = base + size - 1; 5995d63f81cSMiles Chen 6005d63f81cSMiles Chen memblock_dbg("memblock_add: [%pa-%pa] %pF\n", 6015d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 6026a4055bcSAlexander Kuleshov 603f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); 60495f72d1eSYinghai Lu } 60595f72d1eSYinghai Lu 6066a9ceb31STejun Heo /** 6076a9ceb31STejun Heo * memblock_isolate_range - isolate given range into disjoint memblocks 6086a9ceb31STejun Heo * @type: memblock type to isolate range for 6096a9ceb31STejun Heo * @base: base of range to isolate 6106a9ceb31STejun Heo * @size: size of range to isolate 6116a9ceb31STejun Heo * @start_rgn: out parameter for the start of isolated region 6126a9ceb31STejun Heo * @end_rgn: out parameter for the end of isolated region 6136a9ceb31STejun Heo * 6146a9ceb31STejun Heo * Walk @type and ensure that regions don't cross the boundaries defined by 6156a9ceb31STejun Heo * [@base,@base+@size). Crossing regions are split at the boundaries, 6166a9ceb31STejun Heo * which may create at most two more regions. The index of the first 6176a9ceb31STejun Heo * region inside the range is returned in *@start_rgn and end in *@end_rgn. 6186a9ceb31STejun Heo * 6196a9ceb31STejun Heo * RETURNS: 6206a9ceb31STejun Heo * 0 on success, -errno on failure. 6216a9ceb31STejun Heo */ 6226a9ceb31STejun Heo static int __init_memblock memblock_isolate_range(struct memblock_type *type, 6236a9ceb31STejun Heo phys_addr_t base, phys_addr_t size, 6246a9ceb31STejun Heo int *start_rgn, int *end_rgn) 6256a9ceb31STejun Heo { 626eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 6278c9c1701SAlexander Kuleshov int idx; 6288c9c1701SAlexander Kuleshov struct memblock_region *rgn; 6296a9ceb31STejun Heo 6306a9ceb31STejun Heo *start_rgn = *end_rgn = 0; 6316a9ceb31STejun Heo 632b3dc627cSTejun Heo if (!size) 633b3dc627cSTejun Heo return 0; 634b3dc627cSTejun Heo 6356a9ceb31STejun Heo /* we'll create at most two more regions */ 6366a9ceb31STejun Heo while (type->cnt + 2 > type->max) 63748c3b583SGreg Pearson if (memblock_double_array(type, base, size) < 0) 6386a9ceb31STejun Heo return -ENOMEM; 6396a9ceb31STejun Heo 64066e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 6416a9ceb31STejun Heo phys_addr_t rbase = rgn->base; 6426a9ceb31STejun Heo phys_addr_t rend = rbase + rgn->size; 6436a9ceb31STejun Heo 6446a9ceb31STejun Heo if (rbase >= end) 6456a9ceb31STejun Heo break; 6466a9ceb31STejun Heo if (rend <= base) 6476a9ceb31STejun Heo continue; 6486a9ceb31STejun Heo 6496a9ceb31STejun Heo if (rbase < base) { 6506a9ceb31STejun Heo /* 6516a9ceb31STejun Heo * @rgn intersects from below. Split and continue 6526a9ceb31STejun Heo * to process the next region - the new top half. 6536a9ceb31STejun Heo */ 6546a9ceb31STejun Heo rgn->base = base; 6551440c4e2STejun Heo rgn->size -= base - rbase; 6561440c4e2STejun Heo type->total_size -= base - rbase; 6578c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, rbase, base - rbase, 65866a20757STang Chen memblock_get_region_node(rgn), 65966a20757STang Chen rgn->flags); 6606a9ceb31STejun Heo } else if (rend > end) { 6616a9ceb31STejun Heo /* 6626a9ceb31STejun Heo * @rgn intersects from above. Split and redo the 6636a9ceb31STejun Heo * current region - the new bottom half. 6646a9ceb31STejun Heo */ 6656a9ceb31STejun Heo rgn->base = end; 6661440c4e2STejun Heo rgn->size -= end - rbase; 6671440c4e2STejun Heo type->total_size -= end - rbase; 6688c9c1701SAlexander Kuleshov memblock_insert_region(type, idx--, rbase, end - rbase, 66966a20757STang Chen memblock_get_region_node(rgn), 67066a20757STang Chen rgn->flags); 6716a9ceb31STejun Heo } else { 6726a9ceb31STejun Heo /* @rgn is fully contained, record it */ 6736a9ceb31STejun Heo if (!*end_rgn) 6748c9c1701SAlexander Kuleshov *start_rgn = idx; 6758c9c1701SAlexander Kuleshov *end_rgn = idx + 1; 6766a9ceb31STejun Heo } 6776a9ceb31STejun Heo } 6786a9ceb31STejun Heo 6796a9ceb31STejun Heo return 0; 6806a9ceb31STejun Heo } 6816a9ceb31STejun Heo 68235bd16a2SAlexander Kuleshov static int __init_memblock memblock_remove_range(struct memblock_type *type, 6838f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 68495f72d1eSYinghai Lu { 68571936180STejun Heo int start_rgn, end_rgn; 68671936180STejun Heo int i, ret; 68795f72d1eSYinghai Lu 68871936180STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 68971936180STejun Heo if (ret) 69071936180STejun Heo return ret; 69195f72d1eSYinghai Lu 69271936180STejun Heo for (i = end_rgn - 1; i >= start_rgn; i--) 69371936180STejun Heo memblock_remove_region(type, i); 69495f72d1eSYinghai Lu return 0; 69595f72d1eSYinghai Lu } 69695f72d1eSYinghai Lu 697581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 69895f72d1eSYinghai Lu { 699f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.memory, base, size); 70095f72d1eSYinghai Lu } 70195f72d1eSYinghai Lu 702f1af9d3aSPhilipp Hachtmann 703581adcbeSTejun Heo int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) 70495f72d1eSYinghai Lu { 7055d63f81cSMiles Chen phys_addr_t end = base + size - 1; 7065d63f81cSMiles Chen 7075d63f81cSMiles Chen memblock_dbg(" memblock_free: [%pa-%pa] %pF\n", 7085d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 70924aa0788STejun Heo 7109099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 711f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.reserved, base, size); 71295f72d1eSYinghai Lu } 71395f72d1eSYinghai Lu 714f705ac4bSAlexander Kuleshov int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 71595f72d1eSYinghai Lu { 7165d63f81cSMiles Chen phys_addr_t end = base + size - 1; 7175d63f81cSMiles Chen 7185d63f81cSMiles Chen memblock_dbg("memblock_reserve: [%pa-%pa] %pF\n", 7195d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 72095f72d1eSYinghai Lu 721f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); 72295f72d1eSYinghai Lu } 72395f72d1eSYinghai Lu 72435fd0808STejun Heo /** 72566b16edfSTang Chen * 7264308ce17STony Luck * This function isolates region [@base, @base + @size), and sets/clears flag 72766b16edfSTang Chen * 728c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 72966b16edfSTang Chen */ 7304308ce17STony Luck static int __init_memblock memblock_setclr_flag(phys_addr_t base, 7314308ce17STony Luck phys_addr_t size, int set, int flag) 73266b16edfSTang Chen { 73366b16edfSTang Chen struct memblock_type *type = &memblock.memory; 73466b16edfSTang Chen int i, ret, start_rgn, end_rgn; 73566b16edfSTang Chen 73666b16edfSTang Chen ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 73766b16edfSTang Chen if (ret) 73866b16edfSTang Chen return ret; 73966b16edfSTang Chen 74066b16edfSTang Chen for (i = start_rgn; i < end_rgn; i++) 7414308ce17STony Luck if (set) 7424308ce17STony Luck memblock_set_region_flags(&type->regions[i], flag); 7434308ce17STony Luck else 7444308ce17STony Luck memblock_clear_region_flags(&type->regions[i], flag); 74566b16edfSTang Chen 74666b16edfSTang Chen memblock_merge_regions(type); 74766b16edfSTang Chen return 0; 74866b16edfSTang Chen } 74966b16edfSTang Chen 75066b16edfSTang Chen /** 7514308ce17STony Luck * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. 7524308ce17STony Luck * @base: the base phys addr of the region 7534308ce17STony Luck * @size: the size of the region 7544308ce17STony Luck * 755c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 7564308ce17STony Luck */ 7574308ce17STony Luck int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) 7584308ce17STony Luck { 7594308ce17STony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); 7604308ce17STony Luck } 7614308ce17STony Luck 7624308ce17STony Luck /** 76366b16edfSTang Chen * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. 76466b16edfSTang Chen * @base: the base phys addr of the region 76566b16edfSTang Chen * @size: the size of the region 76666b16edfSTang Chen * 767c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 76866b16edfSTang Chen */ 76966b16edfSTang Chen int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) 77066b16edfSTang Chen { 7714308ce17STony Luck return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); 77266b16edfSTang Chen } 77366b16edfSTang Chen 77466b16edfSTang Chen /** 775a3f5bafcSTony Luck * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. 776a3f5bafcSTony Luck * @base: the base phys addr of the region 777a3f5bafcSTony Luck * @size: the size of the region 778a3f5bafcSTony Luck * 779c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 780a3f5bafcSTony Luck */ 781a3f5bafcSTony Luck int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) 782a3f5bafcSTony Luck { 783a3f5bafcSTony Luck system_has_some_mirror = true; 784a3f5bafcSTony Luck 785a3f5bafcSTony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); 786a3f5bafcSTony Luck } 787a3f5bafcSTony Luck 788bf3d3cc5SArd Biesheuvel /** 789bf3d3cc5SArd Biesheuvel * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. 790bf3d3cc5SArd Biesheuvel * @base: the base phys addr of the region 791bf3d3cc5SArd Biesheuvel * @size: the size of the region 792bf3d3cc5SArd Biesheuvel * 793bf3d3cc5SArd Biesheuvel * Return 0 on success, -errno on failure. 794bf3d3cc5SArd Biesheuvel */ 795bf3d3cc5SArd Biesheuvel int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) 796bf3d3cc5SArd Biesheuvel { 797bf3d3cc5SArd Biesheuvel return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); 798bf3d3cc5SArd Biesheuvel } 799a3f5bafcSTony Luck 800a3f5bafcSTony Luck /** 8014c546b8aSAKASHI Takahiro * memblock_clear_nomap - Clear flag MEMBLOCK_NOMAP for a specified region. 8024c546b8aSAKASHI Takahiro * @base: the base phys addr of the region 8034c546b8aSAKASHI Takahiro * @size: the size of the region 8044c546b8aSAKASHI Takahiro * 8054c546b8aSAKASHI Takahiro * Return 0 on success, -errno on failure. 8064c546b8aSAKASHI Takahiro */ 8074c546b8aSAKASHI Takahiro int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size) 8084c546b8aSAKASHI Takahiro { 8094c546b8aSAKASHI Takahiro return memblock_setclr_flag(base, size, 0, MEMBLOCK_NOMAP); 8104c546b8aSAKASHI Takahiro } 8114c546b8aSAKASHI Takahiro 8124c546b8aSAKASHI Takahiro /** 8138e7a7f86SRobin Holt * __next_reserved_mem_region - next function for for_each_reserved_region() 8148e7a7f86SRobin Holt * @idx: pointer to u64 loop variable 8158e7a7f86SRobin Holt * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL 8168e7a7f86SRobin Holt * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL 8178e7a7f86SRobin Holt * 8188e7a7f86SRobin Holt * Iterate over all reserved memory regions. 8198e7a7f86SRobin Holt */ 8208e7a7f86SRobin Holt void __init_memblock __next_reserved_mem_region(u64 *idx, 8218e7a7f86SRobin Holt phys_addr_t *out_start, 8228e7a7f86SRobin Holt phys_addr_t *out_end) 8238e7a7f86SRobin Holt { 824567d117bSAlexander Kuleshov struct memblock_type *type = &memblock.reserved; 8258e7a7f86SRobin Holt 826cd33a76bSRichard Leitner if (*idx < type->cnt) { 827567d117bSAlexander Kuleshov struct memblock_region *r = &type->regions[*idx]; 8288e7a7f86SRobin Holt phys_addr_t base = r->base; 8298e7a7f86SRobin Holt phys_addr_t size = r->size; 8308e7a7f86SRobin Holt 8318e7a7f86SRobin Holt if (out_start) 8328e7a7f86SRobin Holt *out_start = base; 8338e7a7f86SRobin Holt if (out_end) 8348e7a7f86SRobin Holt *out_end = base + size - 1; 8358e7a7f86SRobin Holt 8368e7a7f86SRobin Holt *idx += 1; 8378e7a7f86SRobin Holt return; 8388e7a7f86SRobin Holt } 8398e7a7f86SRobin Holt 8408e7a7f86SRobin Holt /* signal end of iteration */ 8418e7a7f86SRobin Holt *idx = ULLONG_MAX; 8428e7a7f86SRobin Holt } 8438e7a7f86SRobin Holt 8448e7a7f86SRobin Holt /** 845f1af9d3aSPhilipp Hachtmann * __next__mem_range - next function for for_each_free_mem_range() etc. 84635fd0808STejun Heo * @idx: pointer to u64 loop variable 847b1154233SGrygorii Strashko * @nid: node selector, %NUMA_NO_NODE for all nodes 848fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 849f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 850f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 851dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 852dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 853dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 85435fd0808STejun Heo * 855f1af9d3aSPhilipp Hachtmann * Find the first area from *@idx which matches @nid, fill the out 85635fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 857f1af9d3aSPhilipp Hachtmann * *@idx contains index into type_a and the upper 32bit indexes the 858f1af9d3aSPhilipp Hachtmann * areas before each region in type_b. For example, if type_b regions 85935fd0808STejun Heo * look like the following, 86035fd0808STejun Heo * 86135fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 86235fd0808STejun Heo * 86335fd0808STejun Heo * The upper 32bit indexes the following regions. 86435fd0808STejun Heo * 86535fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 86635fd0808STejun Heo * 86735fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 86835fd0808STejun Heo * in lockstep and returns each intersection. 86935fd0808STejun Heo */ 870fc6daaf9STony Luck void __init_memblock __next_mem_range(u64 *idx, int nid, ulong flags, 871f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 872f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 87335fd0808STejun Heo phys_addr_t *out_start, 87435fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 87535fd0808STejun Heo { 876f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 877f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 878b1154233SGrygorii Strashko 879f1af9d3aSPhilipp Hachtmann if (WARN_ONCE(nid == MAX_NUMNODES, 880f1af9d3aSPhilipp Hachtmann "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 881560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 88235fd0808STejun Heo 883f1af9d3aSPhilipp Hachtmann for (; idx_a < type_a->cnt; idx_a++) { 884f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 885f1af9d3aSPhilipp Hachtmann 88635fd0808STejun Heo phys_addr_t m_start = m->base; 88735fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 888f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 88935fd0808STejun Heo 89035fd0808STejun Heo /* only memory regions are associated with nodes, check it */ 891f1af9d3aSPhilipp Hachtmann if (nid != NUMA_NO_NODE && nid != m_nid) 89235fd0808STejun Heo continue; 89335fd0808STejun Heo 8940a313a99SXishi Qiu /* skip hotpluggable memory regions if needed */ 8950a313a99SXishi Qiu if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 8960a313a99SXishi Qiu continue; 8970a313a99SXishi Qiu 898a3f5bafcSTony Luck /* if we want mirror memory skip non-mirror memory regions */ 899a3f5bafcSTony Luck if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 900a3f5bafcSTony Luck continue; 901a3f5bafcSTony Luck 902bf3d3cc5SArd Biesheuvel /* skip nomap memory unless we were asked for it explicitly */ 903bf3d3cc5SArd Biesheuvel if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) 904bf3d3cc5SArd Biesheuvel continue; 905bf3d3cc5SArd Biesheuvel 906f1af9d3aSPhilipp Hachtmann if (!type_b) { 907f1af9d3aSPhilipp Hachtmann if (out_start) 908f1af9d3aSPhilipp Hachtmann *out_start = m_start; 909f1af9d3aSPhilipp Hachtmann if (out_end) 910f1af9d3aSPhilipp Hachtmann *out_end = m_end; 911f1af9d3aSPhilipp Hachtmann if (out_nid) 912f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 913f1af9d3aSPhilipp Hachtmann idx_a++; 914f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 915f1af9d3aSPhilipp Hachtmann return; 916f1af9d3aSPhilipp Hachtmann } 91735fd0808STejun Heo 918f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 919f1af9d3aSPhilipp Hachtmann for (; idx_b < type_b->cnt + 1; idx_b++) { 920f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 921f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 922f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 923f1af9d3aSPhilipp Hachtmann 924f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 925f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 926f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 927f1af9d3aSPhilipp Hachtmann r->base : ULLONG_MAX; 928f1af9d3aSPhilipp Hachtmann 929f1af9d3aSPhilipp Hachtmann /* 930f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 931f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 932f1af9d3aSPhilipp Hachtmann */ 93335fd0808STejun Heo if (r_start >= m_end) 93435fd0808STejun Heo break; 93535fd0808STejun Heo /* if the two regions intersect, we're done */ 93635fd0808STejun Heo if (m_start < r_end) { 93735fd0808STejun Heo if (out_start) 938f1af9d3aSPhilipp Hachtmann *out_start = 939f1af9d3aSPhilipp Hachtmann max(m_start, r_start); 94035fd0808STejun Heo if (out_end) 94135fd0808STejun Heo *out_end = min(m_end, r_end); 94235fd0808STejun Heo if (out_nid) 943f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 94435fd0808STejun Heo /* 945f1af9d3aSPhilipp Hachtmann * The region which ends first is 946f1af9d3aSPhilipp Hachtmann * advanced for the next iteration. 94735fd0808STejun Heo */ 94835fd0808STejun Heo if (m_end <= r_end) 949f1af9d3aSPhilipp Hachtmann idx_a++; 95035fd0808STejun Heo else 951f1af9d3aSPhilipp Hachtmann idx_b++; 952f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 95335fd0808STejun Heo return; 95435fd0808STejun Heo } 95535fd0808STejun Heo } 95635fd0808STejun Heo } 95735fd0808STejun Heo 95835fd0808STejun Heo /* signal end of iteration */ 95935fd0808STejun Heo *idx = ULLONG_MAX; 96035fd0808STejun Heo } 96135fd0808STejun Heo 9627bd0b0f0STejun Heo /** 963f1af9d3aSPhilipp Hachtmann * __next_mem_range_rev - generic next function for for_each_*_range_rev() 964f1af9d3aSPhilipp Hachtmann * 965f1af9d3aSPhilipp Hachtmann * Finds the next range from type_a which is not marked as unsuitable 966f1af9d3aSPhilipp Hachtmann * in type_b. 967f1af9d3aSPhilipp Hachtmann * 9687bd0b0f0STejun Heo * @idx: pointer to u64 loop variable 969ad5ea8cdSAlexander Kuleshov * @nid: node selector, %NUMA_NO_NODE for all nodes 970fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 971f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 972f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 973dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 974dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 975dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 9767bd0b0f0STejun Heo * 977f1af9d3aSPhilipp Hachtmann * Reverse of __next_mem_range(). 9787bd0b0f0STejun Heo */ 979fc6daaf9STony Luck void __init_memblock __next_mem_range_rev(u64 *idx, int nid, ulong flags, 980f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 981f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 9827bd0b0f0STejun Heo phys_addr_t *out_start, 9837bd0b0f0STejun Heo phys_addr_t *out_end, int *out_nid) 9847bd0b0f0STejun Heo { 985f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 986f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 987b1154233SGrygorii Strashko 988560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 989560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 9907bd0b0f0STejun Heo 9917bd0b0f0STejun Heo if (*idx == (u64)ULLONG_MAX) { 992f1af9d3aSPhilipp Hachtmann idx_a = type_a->cnt - 1; 993e47608abSzijun_hu if (type_b != NULL) 994f1af9d3aSPhilipp Hachtmann idx_b = type_b->cnt; 995e47608abSzijun_hu else 996e47608abSzijun_hu idx_b = 0; 9977bd0b0f0STejun Heo } 9987bd0b0f0STejun Heo 999f1af9d3aSPhilipp Hachtmann for (; idx_a >= 0; idx_a--) { 1000f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1001f1af9d3aSPhilipp Hachtmann 10027bd0b0f0STejun Heo phys_addr_t m_start = m->base; 10037bd0b0f0STejun Heo phys_addr_t m_end = m->base + m->size; 1004f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 10057bd0b0f0STejun Heo 10067bd0b0f0STejun Heo /* only memory regions are associated with nodes, check it */ 1007f1af9d3aSPhilipp Hachtmann if (nid != NUMA_NO_NODE && nid != m_nid) 10087bd0b0f0STejun Heo continue; 10097bd0b0f0STejun Heo 101055ac590cSTang Chen /* skip hotpluggable memory regions if needed */ 101155ac590cSTang Chen if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 101255ac590cSTang Chen continue; 101355ac590cSTang Chen 1014a3f5bafcSTony Luck /* if we want mirror memory skip non-mirror memory regions */ 1015a3f5bafcSTony Luck if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 1016a3f5bafcSTony Luck continue; 1017a3f5bafcSTony Luck 1018bf3d3cc5SArd Biesheuvel /* skip nomap memory unless we were asked for it explicitly */ 1019bf3d3cc5SArd Biesheuvel if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) 1020bf3d3cc5SArd Biesheuvel continue; 1021bf3d3cc5SArd Biesheuvel 1022f1af9d3aSPhilipp Hachtmann if (!type_b) { 1023f1af9d3aSPhilipp Hachtmann if (out_start) 1024f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1025f1af9d3aSPhilipp Hachtmann if (out_end) 1026f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1027f1af9d3aSPhilipp Hachtmann if (out_nid) 1028f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1029fb399b48Szijun_hu idx_a--; 1030f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1031f1af9d3aSPhilipp Hachtmann return; 1032f1af9d3aSPhilipp Hachtmann } 10337bd0b0f0STejun Heo 1034f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1035f1af9d3aSPhilipp Hachtmann for (; idx_b >= 0; idx_b--) { 1036f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1037f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1038f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1039f1af9d3aSPhilipp Hachtmann 1040f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1041f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1042f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 1043f1af9d3aSPhilipp Hachtmann r->base : ULLONG_MAX; 1044f1af9d3aSPhilipp Hachtmann /* 1045f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1046f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1047f1af9d3aSPhilipp Hachtmann */ 1048f1af9d3aSPhilipp Hachtmann 10497bd0b0f0STejun Heo if (r_end <= m_start) 10507bd0b0f0STejun Heo break; 10517bd0b0f0STejun Heo /* if the two regions intersect, we're done */ 10527bd0b0f0STejun Heo if (m_end > r_start) { 10537bd0b0f0STejun Heo if (out_start) 10547bd0b0f0STejun Heo *out_start = max(m_start, r_start); 10557bd0b0f0STejun Heo if (out_end) 10567bd0b0f0STejun Heo *out_end = min(m_end, r_end); 10577bd0b0f0STejun Heo if (out_nid) 1058f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 10597bd0b0f0STejun Heo if (m_start >= r_start) 1060f1af9d3aSPhilipp Hachtmann idx_a--; 10617bd0b0f0STejun Heo else 1062f1af9d3aSPhilipp Hachtmann idx_b--; 1063f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 10647bd0b0f0STejun Heo return; 10657bd0b0f0STejun Heo } 10667bd0b0f0STejun Heo } 10677bd0b0f0STejun Heo } 1068f1af9d3aSPhilipp Hachtmann /* signal end of iteration */ 10697bd0b0f0STejun Heo *idx = ULLONG_MAX; 10707bd0b0f0STejun Heo } 10717bd0b0f0STejun Heo 10727c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 10737c0caeb8STejun Heo /* 10747c0caeb8STejun Heo * Common iterator interface used to define for_each_mem_range(). 10757c0caeb8STejun Heo */ 10767c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 10777c0caeb8STejun Heo unsigned long *out_start_pfn, 10787c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 10797c0caeb8STejun Heo { 10807c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 10817c0caeb8STejun Heo struct memblock_region *r; 10827c0caeb8STejun Heo 10837c0caeb8STejun Heo while (++*idx < type->cnt) { 10847c0caeb8STejun Heo r = &type->regions[*idx]; 10857c0caeb8STejun Heo 10867c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 10877c0caeb8STejun Heo continue; 10887c0caeb8STejun Heo if (nid == MAX_NUMNODES || nid == r->nid) 10897c0caeb8STejun Heo break; 10907c0caeb8STejun Heo } 10917c0caeb8STejun Heo if (*idx >= type->cnt) { 10927c0caeb8STejun Heo *idx = -1; 10937c0caeb8STejun Heo return; 10947c0caeb8STejun Heo } 10957c0caeb8STejun Heo 10967c0caeb8STejun Heo if (out_start_pfn) 10977c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 10987c0caeb8STejun Heo if (out_end_pfn) 10997c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 11007c0caeb8STejun Heo if (out_nid) 11017c0caeb8STejun Heo *out_nid = r->nid; 11027c0caeb8STejun Heo } 11037c0caeb8STejun Heo 1104b92df1deSPaul Burton unsigned long __init_memblock memblock_next_valid_pfn(unsigned long pfn, 1105b92df1deSPaul Burton unsigned long max_pfn) 1106b92df1deSPaul Burton { 1107b92df1deSPaul Burton struct memblock_type *type = &memblock.memory; 1108b92df1deSPaul Burton unsigned int right = type->cnt; 1109b92df1deSPaul Burton unsigned int mid, left = 0; 1110b92df1deSPaul Burton phys_addr_t addr = PFN_PHYS(pfn + 1); 1111b92df1deSPaul Burton 1112b92df1deSPaul Burton do { 1113b92df1deSPaul Burton mid = (right + left) / 2; 1114b92df1deSPaul Burton 1115b92df1deSPaul Burton if (addr < type->regions[mid].base) 1116b92df1deSPaul Burton right = mid; 1117b92df1deSPaul Burton else if (addr >= (type->regions[mid].base + 1118b92df1deSPaul Burton type->regions[mid].size)) 1119b92df1deSPaul Burton left = mid + 1; 1120b92df1deSPaul Burton else { 1121b92df1deSPaul Burton /* addr is within the region, so pfn + 1 is valid */ 1122b92df1deSPaul Burton return min(pfn + 1, max_pfn); 1123b92df1deSPaul Burton } 1124b92df1deSPaul Burton } while (left < right); 1125b92df1deSPaul Burton 1126c9a1b80dSAKASHI Takahiro if (right == type->cnt) 1127c9a1b80dSAKASHI Takahiro return max_pfn; 1128c9a1b80dSAKASHI Takahiro else 1129b92df1deSPaul Burton return min(PHYS_PFN(type->regions[right].base), max_pfn); 1130b92df1deSPaul Burton } 1131b92df1deSPaul Burton 11327c0caeb8STejun Heo /** 11337c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 11347c0caeb8STejun Heo * @base: base of area to set node ID for 11357c0caeb8STejun Heo * @size: size of area to set node ID for 1136e7e8de59STang Chen * @type: memblock type to set node ID for 11377c0caeb8STejun Heo * @nid: node ID to set 11387c0caeb8STejun Heo * 1139e7e8de59STang Chen * Set the nid of memblock @type regions in [@base,@base+@size) to @nid. 11407c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 11417c0caeb8STejun Heo * 11427c0caeb8STejun Heo * RETURNS: 11437c0caeb8STejun Heo * 0 on success, -errno on failure. 11447c0caeb8STejun Heo */ 11457c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 1146e7e8de59STang Chen struct memblock_type *type, int nid) 11477c0caeb8STejun Heo { 11486a9ceb31STejun Heo int start_rgn, end_rgn; 11496a9ceb31STejun Heo int i, ret; 11507c0caeb8STejun Heo 11516a9ceb31STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 11526a9ceb31STejun Heo if (ret) 11536a9ceb31STejun Heo return ret; 11547c0caeb8STejun Heo 11556a9ceb31STejun Heo for (i = start_rgn; i < end_rgn; i++) 1156e9d24ad3SWanpeng Li memblock_set_region_node(&type->regions[i], nid); 11577c0caeb8STejun Heo 11587c0caeb8STejun Heo memblock_merge_regions(type); 11597c0caeb8STejun Heo return 0; 11607c0caeb8STejun Heo } 11617c0caeb8STejun Heo #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ 11627c0caeb8STejun Heo 11632bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, 11642bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t start, 1165fc6daaf9STony Luck phys_addr_t end, int nid, ulong flags) 116695f72d1eSYinghai Lu { 11676ed311b2SBenjamin Herrenschmidt phys_addr_t found; 116895f72d1eSYinghai Lu 116979f40fabSGrygorii Strashko if (!align) 117079f40fabSGrygorii Strashko align = SMP_CACHE_BYTES; 117194f3d3afSVineet Gupta 1172fc6daaf9STony Luck found = memblock_find_in_range_node(size, align, start, end, nid, 1173fc6daaf9STony Luck flags); 1174aedf95eaSCatalin Marinas if (found && !memblock_reserve(found, size)) { 1175aedf95eaSCatalin Marinas /* 1176aedf95eaSCatalin Marinas * The min_count is set to 0 so that memblock allocations are 1177aedf95eaSCatalin Marinas * never reported as leaks. 1178aedf95eaSCatalin Marinas */ 11799099daedSCatalin Marinas kmemleak_alloc_phys(found, size, 0, 0); 11806ed311b2SBenjamin Herrenschmidt return found; 1181aedf95eaSCatalin Marinas } 11826ed311b2SBenjamin Herrenschmidt return 0; 118395f72d1eSYinghai Lu } 118495f72d1eSYinghai Lu 11852bfc2862SAkinobu Mita phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, 1186fc6daaf9STony Luck phys_addr_t start, phys_addr_t end, 1187fc6daaf9STony Luck ulong flags) 11882bfc2862SAkinobu Mita { 1189fc6daaf9STony Luck return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, 1190fc6daaf9STony Luck flags); 11912bfc2862SAkinobu Mita } 11922bfc2862SAkinobu Mita 11932bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size, 11942bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t max_addr, 1195fc6daaf9STony Luck int nid, ulong flags) 11962bfc2862SAkinobu Mita { 1197fc6daaf9STony Luck return memblock_alloc_range_nid(size, align, 0, max_addr, nid, flags); 11982bfc2862SAkinobu Mita } 11992bfc2862SAkinobu Mita 12007bd0b0f0STejun Heo phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) 12017bd0b0f0STejun Heo { 1202a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 1203a3f5bafcSTony Luck phys_addr_t ret; 1204a3f5bafcSTony Luck 1205a3f5bafcSTony Luck again: 1206a3f5bafcSTony Luck ret = memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, 1207a3f5bafcSTony Luck nid, flags); 1208a3f5bafcSTony Luck 1209a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 1210a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 1211a3f5bafcSTony Luck goto again; 1212a3f5bafcSTony Luck } 1213a3f5bafcSTony Luck return ret; 12147bd0b0f0STejun Heo } 12157bd0b0f0STejun Heo 12167bd0b0f0STejun Heo phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 12177bd0b0f0STejun Heo { 1218fc6daaf9STony Luck return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE, 1219fc6daaf9STony Luck MEMBLOCK_NONE); 12207bd0b0f0STejun Heo } 12217bd0b0f0STejun Heo 12226ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 122395f72d1eSYinghai Lu { 12246ed311b2SBenjamin Herrenschmidt phys_addr_t alloc; 12256ed311b2SBenjamin Herrenschmidt 12266ed311b2SBenjamin Herrenschmidt alloc = __memblock_alloc_base(size, align, max_addr); 12276ed311b2SBenjamin Herrenschmidt 12286ed311b2SBenjamin Herrenschmidt if (alloc == 0) 12295d63f81cSMiles Chen panic("ERROR: Failed to allocate %pa bytes below %pa.\n", 12305d63f81cSMiles Chen &size, &max_addr); 12316ed311b2SBenjamin Herrenschmidt 12326ed311b2SBenjamin Herrenschmidt return alloc; 123395f72d1eSYinghai Lu } 123495f72d1eSYinghai Lu 12356ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) 123695f72d1eSYinghai Lu { 12376ed311b2SBenjamin Herrenschmidt return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 123895f72d1eSYinghai Lu } 123995f72d1eSYinghai Lu 12409d1e2492SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 12419d1e2492SBenjamin Herrenschmidt { 12429d1e2492SBenjamin Herrenschmidt phys_addr_t res = memblock_alloc_nid(size, align, nid); 12439d1e2492SBenjamin Herrenschmidt 12449d1e2492SBenjamin Herrenschmidt if (res) 12459d1e2492SBenjamin Herrenschmidt return res; 124615fb0972STejun Heo return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 124795f72d1eSYinghai Lu } 124895f72d1eSYinghai Lu 124926f09e9bSSantosh Shilimkar /** 125026f09e9bSSantosh Shilimkar * memblock_virt_alloc_internal - allocate boot memory block 125126f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 125226f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 125326f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region to allocate (phys address) 125426f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region to allocate (phys address) 125526f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 125626f09e9bSSantosh Shilimkar * 125726f09e9bSSantosh Shilimkar * The @min_addr limit is dropped if it can not be satisfied and the allocation 125826f09e9bSSantosh Shilimkar * will fall back to memory below @min_addr. Also, allocation may fall back 125926f09e9bSSantosh Shilimkar * to any node in the system if the specified node can not 126026f09e9bSSantosh Shilimkar * hold the requested memory. 126126f09e9bSSantosh Shilimkar * 126226f09e9bSSantosh Shilimkar * The allocation is performed from memory region limited by 126326f09e9bSSantosh Shilimkar * memblock.current_limit if @max_addr == %BOOTMEM_ALLOC_ACCESSIBLE. 126426f09e9bSSantosh Shilimkar * 126526f09e9bSSantosh Shilimkar * The memory block is aligned on SMP_CACHE_BYTES if @align == 0. 126626f09e9bSSantosh Shilimkar * 126726f09e9bSSantosh Shilimkar * The phys address of allocated boot memory block is converted to virtual and 126826f09e9bSSantosh Shilimkar * allocated memory is reset to 0. 126926f09e9bSSantosh Shilimkar * 127026f09e9bSSantosh Shilimkar * In addition, function sets the min_count to 0 using kmemleak_alloc for 127126f09e9bSSantosh Shilimkar * allocated boot memory block, so that it is never reported as leaks. 127226f09e9bSSantosh Shilimkar * 127326f09e9bSSantosh Shilimkar * RETURNS: 127426f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 127526f09e9bSSantosh Shilimkar */ 127626f09e9bSSantosh Shilimkar static void * __init memblock_virt_alloc_internal( 127726f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 127826f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 127926f09e9bSSantosh Shilimkar int nid) 128026f09e9bSSantosh Shilimkar { 128126f09e9bSSantosh Shilimkar phys_addr_t alloc; 128226f09e9bSSantosh Shilimkar void *ptr; 1283a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 128426f09e9bSSantosh Shilimkar 1285560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1286560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 128726f09e9bSSantosh Shilimkar 128826f09e9bSSantosh Shilimkar /* 128926f09e9bSSantosh Shilimkar * Detect any accidental use of these APIs after slab is ready, as at 129026f09e9bSSantosh Shilimkar * this moment memblock may be deinitialized already and its 129126f09e9bSSantosh Shilimkar * internal data may be destroyed (after execution of free_all_bootmem) 129226f09e9bSSantosh Shilimkar */ 129326f09e9bSSantosh Shilimkar if (WARN_ON_ONCE(slab_is_available())) 129426f09e9bSSantosh Shilimkar return kzalloc_node(size, GFP_NOWAIT, nid); 129526f09e9bSSantosh Shilimkar 129626f09e9bSSantosh Shilimkar if (!align) 129726f09e9bSSantosh Shilimkar align = SMP_CACHE_BYTES; 129826f09e9bSSantosh Shilimkar 1299f544e14fSYinghai Lu if (max_addr > memblock.current_limit) 1300f544e14fSYinghai Lu max_addr = memblock.current_limit; 130126f09e9bSSantosh Shilimkar again: 130226f09e9bSSantosh Shilimkar alloc = memblock_find_in_range_node(size, align, min_addr, max_addr, 1303a3f5bafcSTony Luck nid, flags); 13047d41c03eSWei Yang if (alloc && !memblock_reserve(alloc, size)) 130526f09e9bSSantosh Shilimkar goto done; 130626f09e9bSSantosh Shilimkar 130726f09e9bSSantosh Shilimkar if (nid != NUMA_NO_NODE) { 130826f09e9bSSantosh Shilimkar alloc = memblock_find_in_range_node(size, align, min_addr, 1309fc6daaf9STony Luck max_addr, NUMA_NO_NODE, 1310a3f5bafcSTony Luck flags); 13117d41c03eSWei Yang if (alloc && !memblock_reserve(alloc, size)) 131226f09e9bSSantosh Shilimkar goto done; 131326f09e9bSSantosh Shilimkar } 131426f09e9bSSantosh Shilimkar 131526f09e9bSSantosh Shilimkar if (min_addr) { 131626f09e9bSSantosh Shilimkar min_addr = 0; 131726f09e9bSSantosh Shilimkar goto again; 131826f09e9bSSantosh Shilimkar } 131926f09e9bSSantosh Shilimkar 1320a3f5bafcSTony Luck if (flags & MEMBLOCK_MIRROR) { 1321a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 1322a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 1323a3f5bafcSTony Luck &size); 1324a3f5bafcSTony Luck goto again; 1325a3f5bafcSTony Luck } 1326a3f5bafcSTony Luck 1327a3f5bafcSTony Luck return NULL; 132826f09e9bSSantosh Shilimkar done: 132926f09e9bSSantosh Shilimkar ptr = phys_to_virt(alloc); 133026f09e9bSSantosh Shilimkar 133126f09e9bSSantosh Shilimkar /* 133226f09e9bSSantosh Shilimkar * The min_count is set to 0 so that bootmem allocated blocks 133326f09e9bSSantosh Shilimkar * are never reported as leaks. This is because many of these blocks 133426f09e9bSSantosh Shilimkar * are only referred via the physical address which is not 133526f09e9bSSantosh Shilimkar * looked up by kmemleak. 133626f09e9bSSantosh Shilimkar */ 133726f09e9bSSantosh Shilimkar kmemleak_alloc(ptr, size, 0, 0); 133826f09e9bSSantosh Shilimkar 133926f09e9bSSantosh Shilimkar return ptr; 134026f09e9bSSantosh Shilimkar } 134126f09e9bSSantosh Shilimkar 134226f09e9bSSantosh Shilimkar /** 1343*ea1f5f37SPavel Tatashin * memblock_virt_alloc_try_nid_raw - allocate boot memory block without zeroing 1344*ea1f5f37SPavel Tatashin * memory and without panicking 1345*ea1f5f37SPavel Tatashin * @size: size of memory block to be allocated in bytes 1346*ea1f5f37SPavel Tatashin * @align: alignment of the region and block's size 1347*ea1f5f37SPavel Tatashin * @min_addr: the lower bound of the memory region from where the allocation 1348*ea1f5f37SPavel Tatashin * is preferred (phys address) 1349*ea1f5f37SPavel Tatashin * @max_addr: the upper bound of the memory region from where the allocation 1350*ea1f5f37SPavel Tatashin * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to 1351*ea1f5f37SPavel Tatashin * allocate only from memory limited by memblock.current_limit value 1352*ea1f5f37SPavel Tatashin * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 1353*ea1f5f37SPavel Tatashin * 1354*ea1f5f37SPavel Tatashin * Public function, provides additional debug information (including caller 1355*ea1f5f37SPavel Tatashin * info), if enabled. Does not zero allocated memory, does not panic if request 1356*ea1f5f37SPavel Tatashin * cannot be satisfied. 1357*ea1f5f37SPavel Tatashin * 1358*ea1f5f37SPavel Tatashin * RETURNS: 1359*ea1f5f37SPavel Tatashin * Virtual address of allocated memory block on success, NULL on failure. 1360*ea1f5f37SPavel Tatashin */ 1361*ea1f5f37SPavel Tatashin void * __init memblock_virt_alloc_try_nid_raw( 1362*ea1f5f37SPavel Tatashin phys_addr_t size, phys_addr_t align, 1363*ea1f5f37SPavel Tatashin phys_addr_t min_addr, phys_addr_t max_addr, 1364*ea1f5f37SPavel Tatashin int nid) 1365*ea1f5f37SPavel Tatashin { 1366*ea1f5f37SPavel Tatashin void *ptr; 1367*ea1f5f37SPavel Tatashin 1368*ea1f5f37SPavel Tatashin memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", 1369*ea1f5f37SPavel Tatashin __func__, (u64)size, (u64)align, nid, (u64)min_addr, 1370*ea1f5f37SPavel Tatashin (u64)max_addr, (void *)_RET_IP_); 1371*ea1f5f37SPavel Tatashin 1372*ea1f5f37SPavel Tatashin ptr = memblock_virt_alloc_internal(size, align, 1373*ea1f5f37SPavel Tatashin min_addr, max_addr, nid); 1374*ea1f5f37SPavel Tatashin #ifdef CONFIG_DEBUG_VM 1375*ea1f5f37SPavel Tatashin if (ptr && size > 0) 1376*ea1f5f37SPavel Tatashin memset(ptr, 0xff, size); 1377*ea1f5f37SPavel Tatashin #endif 1378*ea1f5f37SPavel Tatashin return ptr; 1379*ea1f5f37SPavel Tatashin } 1380*ea1f5f37SPavel Tatashin 1381*ea1f5f37SPavel Tatashin /** 138226f09e9bSSantosh Shilimkar * memblock_virt_alloc_try_nid_nopanic - allocate boot memory block 138326f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 138426f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 138526f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 138626f09e9bSSantosh Shilimkar * is preferred (phys address) 138726f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 138826f09e9bSSantosh Shilimkar * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to 138926f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 139026f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 139126f09e9bSSantosh Shilimkar * 1392*ea1f5f37SPavel Tatashin * Public function, provides additional debug information (including caller 1393*ea1f5f37SPavel Tatashin * info), if enabled. This function zeroes the allocated memory. 139426f09e9bSSantosh Shilimkar * 139526f09e9bSSantosh Shilimkar * RETURNS: 139626f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 139726f09e9bSSantosh Shilimkar */ 139826f09e9bSSantosh Shilimkar void * __init memblock_virt_alloc_try_nid_nopanic( 139926f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 140026f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 140126f09e9bSSantosh Shilimkar int nid) 140226f09e9bSSantosh Shilimkar { 1403*ea1f5f37SPavel Tatashin void *ptr; 1404*ea1f5f37SPavel Tatashin 140526f09e9bSSantosh Shilimkar memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", 140626f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 140726f09e9bSSantosh Shilimkar (u64)max_addr, (void *)_RET_IP_); 1408*ea1f5f37SPavel Tatashin 1409*ea1f5f37SPavel Tatashin ptr = memblock_virt_alloc_internal(size, align, 1410*ea1f5f37SPavel Tatashin min_addr, max_addr, nid); 1411*ea1f5f37SPavel Tatashin if (ptr) 1412*ea1f5f37SPavel Tatashin memset(ptr, 0, size); 1413*ea1f5f37SPavel Tatashin return ptr; 141426f09e9bSSantosh Shilimkar } 141526f09e9bSSantosh Shilimkar 141626f09e9bSSantosh Shilimkar /** 141726f09e9bSSantosh Shilimkar * memblock_virt_alloc_try_nid - allocate boot memory block with panicking 141826f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 141926f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 142026f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 142126f09e9bSSantosh Shilimkar * is preferred (phys address) 142226f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 142326f09e9bSSantosh Shilimkar * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to 142426f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 142526f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 142626f09e9bSSantosh Shilimkar * 1427*ea1f5f37SPavel Tatashin * Public panicking version of memblock_virt_alloc_try_nid_nopanic() 142826f09e9bSSantosh Shilimkar * which provides debug information (including caller info), if enabled, 142926f09e9bSSantosh Shilimkar * and panics if the request can not be satisfied. 143026f09e9bSSantosh Shilimkar * 143126f09e9bSSantosh Shilimkar * RETURNS: 143226f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 143326f09e9bSSantosh Shilimkar */ 143426f09e9bSSantosh Shilimkar void * __init memblock_virt_alloc_try_nid( 143526f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 143626f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 143726f09e9bSSantosh Shilimkar int nid) 143826f09e9bSSantosh Shilimkar { 143926f09e9bSSantosh Shilimkar void *ptr; 144026f09e9bSSantosh Shilimkar 144126f09e9bSSantosh Shilimkar memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", 144226f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 144326f09e9bSSantosh Shilimkar (u64)max_addr, (void *)_RET_IP_); 144426f09e9bSSantosh Shilimkar ptr = memblock_virt_alloc_internal(size, align, 144526f09e9bSSantosh Shilimkar min_addr, max_addr, nid); 1446*ea1f5f37SPavel Tatashin if (ptr) { 1447*ea1f5f37SPavel Tatashin memset(ptr, 0, size); 144826f09e9bSSantosh Shilimkar return ptr; 1449*ea1f5f37SPavel Tatashin } 145026f09e9bSSantosh Shilimkar 145126f09e9bSSantosh Shilimkar panic("%s: Failed to allocate %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx\n", 145226f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 145326f09e9bSSantosh Shilimkar (u64)max_addr); 145426f09e9bSSantosh Shilimkar return NULL; 145526f09e9bSSantosh Shilimkar } 145626f09e9bSSantosh Shilimkar 145726f09e9bSSantosh Shilimkar /** 145826f09e9bSSantosh Shilimkar * __memblock_free_early - free boot memory block 145926f09e9bSSantosh Shilimkar * @base: phys starting address of the boot memory block 146026f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 146126f09e9bSSantosh Shilimkar * 146226f09e9bSSantosh Shilimkar * Free boot memory block previously allocated by memblock_virt_alloc_xx() API. 146326f09e9bSSantosh Shilimkar * The freeing memory will not be released to the buddy allocator. 146426f09e9bSSantosh Shilimkar */ 146526f09e9bSSantosh Shilimkar void __init __memblock_free_early(phys_addr_t base, phys_addr_t size) 146626f09e9bSSantosh Shilimkar { 146726f09e9bSSantosh Shilimkar memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", 146826f09e9bSSantosh Shilimkar __func__, (u64)base, (u64)base + size - 1, 146926f09e9bSSantosh Shilimkar (void *)_RET_IP_); 14709099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 1471f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, base, size); 147226f09e9bSSantosh Shilimkar } 147326f09e9bSSantosh Shilimkar 147426f09e9bSSantosh Shilimkar /* 147526f09e9bSSantosh Shilimkar * __memblock_free_late - free bootmem block pages directly to buddy allocator 147626f09e9bSSantosh Shilimkar * @addr: phys starting address of the boot memory block 147726f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 147826f09e9bSSantosh Shilimkar * 147926f09e9bSSantosh Shilimkar * This is only useful when the bootmem allocator has already been torn 148026f09e9bSSantosh Shilimkar * down, but we are still initializing the system. Pages are released directly 148126f09e9bSSantosh Shilimkar * to the buddy allocator, no bootmem metadata is updated because it is gone. 148226f09e9bSSantosh Shilimkar */ 148326f09e9bSSantosh Shilimkar void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) 148426f09e9bSSantosh Shilimkar { 148526f09e9bSSantosh Shilimkar u64 cursor, end; 148626f09e9bSSantosh Shilimkar 148726f09e9bSSantosh Shilimkar memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", 148826f09e9bSSantosh Shilimkar __func__, (u64)base, (u64)base + size - 1, 148926f09e9bSSantosh Shilimkar (void *)_RET_IP_); 14909099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 149126f09e9bSSantosh Shilimkar cursor = PFN_UP(base); 149226f09e9bSSantosh Shilimkar end = PFN_DOWN(base + size); 149326f09e9bSSantosh Shilimkar 149426f09e9bSSantosh Shilimkar for (; cursor < end; cursor++) { 1495d70ddd7aSMel Gorman __free_pages_bootmem(pfn_to_page(cursor), cursor, 0); 149626f09e9bSSantosh Shilimkar totalram_pages++; 149726f09e9bSSantosh Shilimkar } 149826f09e9bSSantosh Shilimkar } 14999d1e2492SBenjamin Herrenschmidt 15009d1e2492SBenjamin Herrenschmidt /* 15019d1e2492SBenjamin Herrenschmidt * Remaining API functions 15029d1e2492SBenjamin Herrenschmidt */ 15039d1e2492SBenjamin Herrenschmidt 15041f1ffb8aSDavid Gibson phys_addr_t __init_memblock memblock_phys_mem_size(void) 150595f72d1eSYinghai Lu { 15061440c4e2STejun Heo return memblock.memory.total_size; 150795f72d1eSYinghai Lu } 150895f72d1eSYinghai Lu 15098907de5dSSrikar Dronamraju phys_addr_t __init_memblock memblock_reserved_size(void) 15108907de5dSSrikar Dronamraju { 15118907de5dSSrikar Dronamraju return memblock.reserved.total_size; 15128907de5dSSrikar Dronamraju } 15138907de5dSSrikar Dronamraju 1514595ad9afSYinghai Lu phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) 1515595ad9afSYinghai Lu { 1516595ad9afSYinghai Lu unsigned long pages = 0; 1517595ad9afSYinghai Lu struct memblock_region *r; 1518595ad9afSYinghai Lu unsigned long start_pfn, end_pfn; 1519595ad9afSYinghai Lu 1520595ad9afSYinghai Lu for_each_memblock(memory, r) { 1521595ad9afSYinghai Lu start_pfn = memblock_region_memory_base_pfn(r); 1522595ad9afSYinghai Lu end_pfn = memblock_region_memory_end_pfn(r); 1523595ad9afSYinghai Lu start_pfn = min_t(unsigned long, start_pfn, limit_pfn); 1524595ad9afSYinghai Lu end_pfn = min_t(unsigned long, end_pfn, limit_pfn); 1525595ad9afSYinghai Lu pages += end_pfn - start_pfn; 1526595ad9afSYinghai Lu } 1527595ad9afSYinghai Lu 152816763230SFabian Frederick return PFN_PHYS(pages); 1529595ad9afSYinghai Lu } 1530595ad9afSYinghai Lu 15310a93ebefSSam Ravnborg /* lowest address */ 15320a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 15330a93ebefSSam Ravnborg { 15340a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 15350a93ebefSSam Ravnborg } 15360a93ebefSSam Ravnborg 153710d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 153895f72d1eSYinghai Lu { 153995f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 154095f72d1eSYinghai Lu 1541e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 154295f72d1eSYinghai Lu } 154395f72d1eSYinghai Lu 1544a571d4ebSDennis Chen static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit) 154595f72d1eSYinghai Lu { 1546c0ce8fefSTejun Heo phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; 1547136199f0SEmil Medve struct memblock_region *r; 154895f72d1eSYinghai Lu 1549a571d4ebSDennis Chen /* 1550a571d4ebSDennis Chen * translate the memory @limit size into the max address within one of 1551a571d4ebSDennis Chen * the memory memblock regions, if the @limit exceeds the total size 1552a571d4ebSDennis Chen * of those regions, max_addr will keep original value ULLONG_MAX 1553a571d4ebSDennis Chen */ 1554136199f0SEmil Medve for_each_memblock(memory, r) { 1555c0ce8fefSTejun Heo if (limit <= r->size) { 1556c0ce8fefSTejun Heo max_addr = r->base + limit; 155795f72d1eSYinghai Lu break; 155895f72d1eSYinghai Lu } 1559c0ce8fefSTejun Heo limit -= r->size; 156095f72d1eSYinghai Lu } 1561c0ce8fefSTejun Heo 1562a571d4ebSDennis Chen return max_addr; 1563a571d4ebSDennis Chen } 1564a571d4ebSDennis Chen 1565a571d4ebSDennis Chen void __init memblock_enforce_memory_limit(phys_addr_t limit) 1566a571d4ebSDennis Chen { 1567a571d4ebSDennis Chen phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; 1568a571d4ebSDennis Chen 1569a571d4ebSDennis Chen if (!limit) 1570a571d4ebSDennis Chen return; 1571a571d4ebSDennis Chen 1572a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1573a571d4ebSDennis Chen 1574a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 1575a571d4ebSDennis Chen if (max_addr == (phys_addr_t)ULLONG_MAX) 1576a571d4ebSDennis Chen return; 1577a571d4ebSDennis Chen 1578c0ce8fefSTejun Heo /* truncate both memory and reserved regions */ 1579f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.memory, max_addr, 1580f1af9d3aSPhilipp Hachtmann (phys_addr_t)ULLONG_MAX); 1581f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, max_addr, 1582f1af9d3aSPhilipp Hachtmann (phys_addr_t)ULLONG_MAX); 158395f72d1eSYinghai Lu } 158495f72d1eSYinghai Lu 1585c9ca9b4eSAKASHI Takahiro void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size) 1586c9ca9b4eSAKASHI Takahiro { 1587c9ca9b4eSAKASHI Takahiro int start_rgn, end_rgn; 1588c9ca9b4eSAKASHI Takahiro int i, ret; 1589c9ca9b4eSAKASHI Takahiro 1590c9ca9b4eSAKASHI Takahiro if (!size) 1591c9ca9b4eSAKASHI Takahiro return; 1592c9ca9b4eSAKASHI Takahiro 1593c9ca9b4eSAKASHI Takahiro ret = memblock_isolate_range(&memblock.memory, base, size, 1594c9ca9b4eSAKASHI Takahiro &start_rgn, &end_rgn); 1595c9ca9b4eSAKASHI Takahiro if (ret) 1596c9ca9b4eSAKASHI Takahiro return; 1597c9ca9b4eSAKASHI Takahiro 1598c9ca9b4eSAKASHI Takahiro /* remove all the MAP regions */ 1599c9ca9b4eSAKASHI Takahiro for (i = memblock.memory.cnt - 1; i >= end_rgn; i--) 1600c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1601c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1602c9ca9b4eSAKASHI Takahiro 1603c9ca9b4eSAKASHI Takahiro for (i = start_rgn - 1; i >= 0; i--) 1604c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1605c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1606c9ca9b4eSAKASHI Takahiro 1607c9ca9b4eSAKASHI Takahiro /* truncate the reserved regions */ 1608c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 0, base); 1609c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 1610c9ca9b4eSAKASHI Takahiro base + size, (phys_addr_t)ULLONG_MAX); 1611c9ca9b4eSAKASHI Takahiro } 1612c9ca9b4eSAKASHI Takahiro 1613a571d4ebSDennis Chen void __init memblock_mem_limit_remove_map(phys_addr_t limit) 1614a571d4ebSDennis Chen { 1615a571d4ebSDennis Chen phys_addr_t max_addr; 1616a571d4ebSDennis Chen 1617a571d4ebSDennis Chen if (!limit) 1618a571d4ebSDennis Chen return; 1619a571d4ebSDennis Chen 1620a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1621a571d4ebSDennis Chen 1622a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 1623a571d4ebSDennis Chen if (max_addr == (phys_addr_t)ULLONG_MAX) 1624a571d4ebSDennis Chen return; 1625a571d4ebSDennis Chen 1626c9ca9b4eSAKASHI Takahiro memblock_cap_memory_range(0, max_addr); 1627a571d4ebSDennis Chen } 1628a571d4ebSDennis Chen 1629cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 163072d4b0b4SBenjamin Herrenschmidt { 163172d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 163272d4b0b4SBenjamin Herrenschmidt 163372d4b0b4SBenjamin Herrenschmidt do { 163472d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 163572d4b0b4SBenjamin Herrenschmidt 163672d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 163772d4b0b4SBenjamin Herrenschmidt right = mid; 163872d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 163972d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 164072d4b0b4SBenjamin Herrenschmidt left = mid + 1; 164172d4b0b4SBenjamin Herrenschmidt else 164272d4b0b4SBenjamin Herrenschmidt return mid; 164372d4b0b4SBenjamin Herrenschmidt } while (left < right); 164472d4b0b4SBenjamin Herrenschmidt return -1; 164572d4b0b4SBenjamin Herrenschmidt } 164672d4b0b4SBenjamin Herrenschmidt 1647b4ad0c7eSYaowei Bai bool __init memblock_is_reserved(phys_addr_t addr) 164895f72d1eSYinghai Lu { 164972d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 165095f72d1eSYinghai Lu } 165172d4b0b4SBenjamin Herrenschmidt 1652b4ad0c7eSYaowei Bai bool __init_memblock memblock_is_memory(phys_addr_t addr) 165372d4b0b4SBenjamin Herrenschmidt { 165472d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 165572d4b0b4SBenjamin Herrenschmidt } 165672d4b0b4SBenjamin Herrenschmidt 1657bf3d3cc5SArd Biesheuvel int __init_memblock memblock_is_map_memory(phys_addr_t addr) 1658bf3d3cc5SArd Biesheuvel { 1659bf3d3cc5SArd Biesheuvel int i = memblock_search(&memblock.memory, addr); 1660bf3d3cc5SArd Biesheuvel 1661bf3d3cc5SArd Biesheuvel if (i == -1) 1662bf3d3cc5SArd Biesheuvel return false; 1663bf3d3cc5SArd Biesheuvel return !memblock_is_nomap(&memblock.memory.regions[i]); 1664bf3d3cc5SArd Biesheuvel } 1665bf3d3cc5SArd Biesheuvel 1666e76b63f8SYinghai Lu #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 1667e76b63f8SYinghai Lu int __init_memblock memblock_search_pfn_nid(unsigned long pfn, 1668e76b63f8SYinghai Lu unsigned long *start_pfn, unsigned long *end_pfn) 1669e76b63f8SYinghai Lu { 1670e76b63f8SYinghai Lu struct memblock_type *type = &memblock.memory; 167116763230SFabian Frederick int mid = memblock_search(type, PFN_PHYS(pfn)); 1672e76b63f8SYinghai Lu 1673e76b63f8SYinghai Lu if (mid == -1) 1674e76b63f8SYinghai Lu return -1; 1675e76b63f8SYinghai Lu 1676f7e2f7e8SFabian Frederick *start_pfn = PFN_DOWN(type->regions[mid].base); 1677f7e2f7e8SFabian Frederick *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); 1678e76b63f8SYinghai Lu 1679e76b63f8SYinghai Lu return type->regions[mid].nid; 1680e76b63f8SYinghai Lu } 1681e76b63f8SYinghai Lu #endif 1682e76b63f8SYinghai Lu 1683eab30949SStephen Boyd /** 1684eab30949SStephen Boyd * memblock_is_region_memory - check if a region is a subset of memory 1685eab30949SStephen Boyd * @base: base of region to check 1686eab30949SStephen Boyd * @size: size of region to check 1687eab30949SStephen Boyd * 1688eab30949SStephen Boyd * Check if the region [@base, @base+@size) is a subset of a memory block. 1689eab30949SStephen Boyd * 1690eab30949SStephen Boyd * RETURNS: 1691eab30949SStephen Boyd * 0 if false, non-zero if true 1692eab30949SStephen Boyd */ 16933661ca66SYinghai Lu int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 169472d4b0b4SBenjamin Herrenschmidt { 1695abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 1696eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 169772d4b0b4SBenjamin Herrenschmidt 169872d4b0b4SBenjamin Herrenschmidt if (idx == -1) 169995f72d1eSYinghai Lu return 0; 1700ef415ef4SWei Yang return (memblock.memory.regions[idx].base + 1701eb18f1b5STejun Heo memblock.memory.regions[idx].size) >= end; 170295f72d1eSYinghai Lu } 170395f72d1eSYinghai Lu 1704eab30949SStephen Boyd /** 1705eab30949SStephen Boyd * memblock_is_region_reserved - check if a region intersects reserved memory 1706eab30949SStephen Boyd * @base: base of region to check 1707eab30949SStephen Boyd * @size: size of region to check 1708eab30949SStephen Boyd * 1709eab30949SStephen Boyd * Check if the region [@base, @base+@size) intersects a reserved memory block. 1710eab30949SStephen Boyd * 1711eab30949SStephen Boyd * RETURNS: 1712c5c5c9d1STang Chen * True if they intersect, false if not. 1713eab30949SStephen Boyd */ 1714c5c5c9d1STang Chen bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 171595f72d1eSYinghai Lu { 1716eb18f1b5STejun Heo memblock_cap_size(base, &size); 1717c5c5c9d1STang Chen return memblock_overlaps_region(&memblock.reserved, base, size); 171895f72d1eSYinghai Lu } 171995f72d1eSYinghai Lu 17206ede1fd3SYinghai Lu void __init_memblock memblock_trim_memory(phys_addr_t align) 17216ede1fd3SYinghai Lu { 17226ede1fd3SYinghai Lu phys_addr_t start, end, orig_start, orig_end; 1723136199f0SEmil Medve struct memblock_region *r; 17246ede1fd3SYinghai Lu 1725136199f0SEmil Medve for_each_memblock(memory, r) { 1726136199f0SEmil Medve orig_start = r->base; 1727136199f0SEmil Medve orig_end = r->base + r->size; 17286ede1fd3SYinghai Lu start = round_up(orig_start, align); 17296ede1fd3SYinghai Lu end = round_down(orig_end, align); 17306ede1fd3SYinghai Lu 17316ede1fd3SYinghai Lu if (start == orig_start && end == orig_end) 17326ede1fd3SYinghai Lu continue; 17336ede1fd3SYinghai Lu 17346ede1fd3SYinghai Lu if (start < end) { 1735136199f0SEmil Medve r->base = start; 1736136199f0SEmil Medve r->size = end - start; 17376ede1fd3SYinghai Lu } else { 1738136199f0SEmil Medve memblock_remove_region(&memblock.memory, 1739136199f0SEmil Medve r - memblock.memory.regions); 1740136199f0SEmil Medve r--; 17416ede1fd3SYinghai Lu } 17426ede1fd3SYinghai Lu } 17436ede1fd3SYinghai Lu } 1744e63075a3SBenjamin Herrenschmidt 17453661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 1746e63075a3SBenjamin Herrenschmidt { 1747e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 1748e63075a3SBenjamin Herrenschmidt } 1749e63075a3SBenjamin Herrenschmidt 1750fec51014SLaura Abbott phys_addr_t __init_memblock memblock_get_current_limit(void) 1751fec51014SLaura Abbott { 1752fec51014SLaura Abbott return memblock.current_limit; 1753fec51014SLaura Abbott } 1754fec51014SLaura Abbott 17550262d9c8SHeiko Carstens static void __init_memblock memblock_dump(struct memblock_type *type) 17566ed311b2SBenjamin Herrenschmidt { 17575d63f81cSMiles Chen phys_addr_t base, end, size; 175866a20757STang Chen unsigned long flags; 17598c9c1701SAlexander Kuleshov int idx; 17608c9c1701SAlexander Kuleshov struct memblock_region *rgn; 17616ed311b2SBenjamin Herrenschmidt 17620262d9c8SHeiko Carstens pr_info(" %s.cnt = 0x%lx\n", type->name, type->cnt); 17636ed311b2SBenjamin Herrenschmidt 176466e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 17657c0caeb8STejun Heo char nid_buf[32] = ""; 17666ed311b2SBenjamin Herrenschmidt 17677c0caeb8STejun Heo base = rgn->base; 17687c0caeb8STejun Heo size = rgn->size; 17695d63f81cSMiles Chen end = base + size - 1; 177066a20757STang Chen flags = rgn->flags; 17717c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 17727c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 17737c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 17747c0caeb8STejun Heo memblock_get_region_node(rgn)); 17757c0caeb8STejun Heo #endif 17765d63f81cSMiles Chen pr_info(" %s[%#x]\t[%pa-%pa], %pa bytes%s flags: %#lx\n", 17770262d9c8SHeiko Carstens type->name, idx, &base, &end, &size, nid_buf, flags); 17786ed311b2SBenjamin Herrenschmidt } 17796ed311b2SBenjamin Herrenschmidt } 17806ed311b2SBenjamin Herrenschmidt 1781864b9a39SMichal Hocko extern unsigned long __init_memblock 1782864b9a39SMichal Hocko memblock_reserved_memory_within(phys_addr_t start_addr, phys_addr_t end_addr) 1783864b9a39SMichal Hocko { 1784864b9a39SMichal Hocko struct memblock_region *rgn; 1785864b9a39SMichal Hocko unsigned long size = 0; 1786864b9a39SMichal Hocko int idx; 1787864b9a39SMichal Hocko 178866e8b438SGioh Kim for_each_memblock_type(idx, (&memblock.reserved), rgn) { 1789864b9a39SMichal Hocko phys_addr_t start, end; 1790864b9a39SMichal Hocko 1791864b9a39SMichal Hocko if (rgn->base + rgn->size < start_addr) 1792864b9a39SMichal Hocko continue; 1793864b9a39SMichal Hocko if (rgn->base > end_addr) 1794864b9a39SMichal Hocko continue; 1795864b9a39SMichal Hocko 1796864b9a39SMichal Hocko start = rgn->base; 1797864b9a39SMichal Hocko end = start + rgn->size; 1798864b9a39SMichal Hocko size += end - start; 1799864b9a39SMichal Hocko } 1800864b9a39SMichal Hocko 1801864b9a39SMichal Hocko return size; 1802864b9a39SMichal Hocko } 1803864b9a39SMichal Hocko 18044ff7b82fSTejun Heo void __init_memblock __memblock_dump_all(void) 18056ed311b2SBenjamin Herrenschmidt { 18066ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 18075d63f81cSMiles Chen pr_info(" memory size = %pa reserved size = %pa\n", 18085d63f81cSMiles Chen &memblock.memory.total_size, 18095d63f81cSMiles Chen &memblock.reserved.total_size); 18106ed311b2SBenjamin Herrenschmidt 18110262d9c8SHeiko Carstens memblock_dump(&memblock.memory); 18120262d9c8SHeiko Carstens memblock_dump(&memblock.reserved); 1813409efd4cSHeiko Carstens #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 18140262d9c8SHeiko Carstens memblock_dump(&memblock.physmem); 1815409efd4cSHeiko Carstens #endif 18166ed311b2SBenjamin Herrenschmidt } 18176ed311b2SBenjamin Herrenschmidt 18181aadc056STejun Heo void __init memblock_allow_resize(void) 18196ed311b2SBenjamin Herrenschmidt { 1820142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 18216ed311b2SBenjamin Herrenschmidt } 18226ed311b2SBenjamin Herrenschmidt 18236ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 18246ed311b2SBenjamin Herrenschmidt { 18256ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 18266ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 18276ed311b2SBenjamin Herrenschmidt return 0; 18286ed311b2SBenjamin Herrenschmidt } 18296ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 18306ed311b2SBenjamin Herrenschmidt 1831c378ddd5STejun Heo #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) 18326d03b885SBenjamin Herrenschmidt 18336d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 18346d03b885SBenjamin Herrenschmidt { 18356d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 18366d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 18376d03b885SBenjamin Herrenschmidt int i; 18385d63f81cSMiles Chen phys_addr_t end; 18396d03b885SBenjamin Herrenschmidt 18406d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 18416d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 18425d63f81cSMiles Chen end = reg->base + reg->size - 1; 18436d03b885SBenjamin Herrenschmidt 18445d63f81cSMiles Chen seq_printf(m, "%4d: ", i); 18455d63f81cSMiles Chen seq_printf(m, "%pa..%pa\n", ®->base, &end); 18466d03b885SBenjamin Herrenschmidt } 18476d03b885SBenjamin Herrenschmidt return 0; 18486d03b885SBenjamin Herrenschmidt } 18496d03b885SBenjamin Herrenschmidt 18506d03b885SBenjamin Herrenschmidt static int memblock_debug_open(struct inode *inode, struct file *file) 18516d03b885SBenjamin Herrenschmidt { 18526d03b885SBenjamin Herrenschmidt return single_open(file, memblock_debug_show, inode->i_private); 18536d03b885SBenjamin Herrenschmidt } 18546d03b885SBenjamin Herrenschmidt 18556d03b885SBenjamin Herrenschmidt static const struct file_operations memblock_debug_fops = { 18566d03b885SBenjamin Herrenschmidt .open = memblock_debug_open, 18576d03b885SBenjamin Herrenschmidt .read = seq_read, 18586d03b885SBenjamin Herrenschmidt .llseek = seq_lseek, 18596d03b885SBenjamin Herrenschmidt .release = single_release, 18606d03b885SBenjamin Herrenschmidt }; 18616d03b885SBenjamin Herrenschmidt 18626d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 18636d03b885SBenjamin Herrenschmidt { 18646d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 18656d03b885SBenjamin Herrenschmidt if (!root) 18666d03b885SBenjamin Herrenschmidt return -ENXIO; 18676d03b885SBenjamin Herrenschmidt debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); 18686d03b885SBenjamin Herrenschmidt debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); 186970210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 187070210ed9SPhilipp Hachtmann debugfs_create_file("physmem", S_IRUGO, root, &memblock.physmem, &memblock_debug_fops); 187170210ed9SPhilipp Hachtmann #endif 18726d03b885SBenjamin Herrenschmidt 18736d03b885SBenjamin Herrenschmidt return 0; 18746d03b885SBenjamin Herrenschmidt } 18756d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 18766d03b885SBenjamin Herrenschmidt 18776d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 1878