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 2379442ed1STang Chen #include <asm-generic/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, 38fe091c20STejun Heo 39fe091c20STejun Heo .reserved.regions = memblock_reserved_init_regions, 40fe091c20STejun Heo .reserved.cnt = 1, /* empty dummy entry */ 41fe091c20STejun Heo .reserved.max = INIT_MEMBLOCK_REGIONS, 42fe091c20STejun Heo 4370210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 4470210ed9SPhilipp Hachtmann .physmem.regions = memblock_physmem_init_regions, 4570210ed9SPhilipp Hachtmann .physmem.cnt = 1, /* empty dummy entry */ 4670210ed9SPhilipp Hachtmann .physmem.max = INIT_PHYSMEM_REGIONS, 4770210ed9SPhilipp Hachtmann #endif 4870210ed9SPhilipp Hachtmann 4979442ed1STang Chen .bottom_up = false, 50fe091c20STejun Heo .current_limit = MEMBLOCK_ALLOC_ANYWHERE, 51fe091c20STejun Heo }; 5295f72d1eSYinghai Lu 5310d06439SYinghai Lu int memblock_debug __initdata_memblock; 5455ac590cSTang Chen #ifdef CONFIG_MOVABLE_NODE 5555ac590cSTang Chen bool movable_node_enabled __initdata_memblock = false; 5655ac590cSTang Chen #endif 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 67142b45a7SBenjamin Herrenschmidt /* inline so we don't get a warning when pr_debug is compiled out */ 68c2233116SRaghavendra D Prabhu static __init_memblock const char * 69c2233116SRaghavendra D Prabhu memblock_type_name(struct memblock_type *type) 70142b45a7SBenjamin Herrenschmidt { 71142b45a7SBenjamin Herrenschmidt if (type == &memblock.memory) 72142b45a7SBenjamin Herrenschmidt return "memory"; 73142b45a7SBenjamin Herrenschmidt else if (type == &memblock.reserved) 74142b45a7SBenjamin Herrenschmidt return "reserved"; 75142b45a7SBenjamin Herrenschmidt else 76142b45a7SBenjamin Herrenschmidt return "unknown"; 77142b45a7SBenjamin Herrenschmidt } 78142b45a7SBenjamin Herrenschmidt 79eb18f1b5STejun Heo /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ 80eb18f1b5STejun Heo static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) 81eb18f1b5STejun Heo { 82eb18f1b5STejun Heo return *size = min(*size, (phys_addr_t)ULLONG_MAX - base); 83eb18f1b5STejun Heo } 84eb18f1b5STejun Heo 856ed311b2SBenjamin Herrenschmidt /* 866ed311b2SBenjamin Herrenschmidt * Address comparison utilities 876ed311b2SBenjamin Herrenschmidt */ 8810d06439SYinghai Lu static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, 892898cc4cSBenjamin Herrenschmidt phys_addr_t base2, phys_addr_t size2) 9095f72d1eSYinghai Lu { 9195f72d1eSYinghai Lu return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); 9295f72d1eSYinghai Lu } 9395f72d1eSYinghai Lu 942d7d3eb2SH Hartley Sweeten static long __init_memblock memblock_overlaps_region(struct memblock_type *type, 952d7d3eb2SH Hartley Sweeten phys_addr_t base, phys_addr_t size) 966ed311b2SBenjamin Herrenschmidt { 976ed311b2SBenjamin Herrenschmidt unsigned long i; 986ed311b2SBenjamin Herrenschmidt 996ed311b2SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 1006ed311b2SBenjamin Herrenschmidt phys_addr_t rgnbase = type->regions[i].base; 1016ed311b2SBenjamin Herrenschmidt phys_addr_t rgnsize = type->regions[i].size; 1026ed311b2SBenjamin Herrenschmidt if (memblock_addrs_overlap(base, size, rgnbase, rgnsize)) 1036ed311b2SBenjamin Herrenschmidt break; 1046ed311b2SBenjamin Herrenschmidt } 1056ed311b2SBenjamin Herrenschmidt 1066ed311b2SBenjamin Herrenschmidt return (i < type->cnt) ? i : -1; 1076ed311b2SBenjamin Herrenschmidt } 1086ed311b2SBenjamin Herrenschmidt 10979442ed1STang Chen /* 11079442ed1STang Chen * __memblock_find_range_bottom_up - find free area utility in bottom-up 11179442ed1STang Chen * @start: start of candidate range 11279442ed1STang Chen * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 11379442ed1STang Chen * @size: size of free area to find 11479442ed1STang Chen * @align: alignment of free area to find 115b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 116fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 11779442ed1STang Chen * 11879442ed1STang Chen * Utility called from memblock_find_in_range_node(), find free area bottom-up. 11979442ed1STang Chen * 12079442ed1STang Chen * RETURNS: 12179442ed1STang Chen * Found address on success, 0 on failure. 12279442ed1STang Chen */ 12379442ed1STang Chen static phys_addr_t __init_memblock 12479442ed1STang Chen __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, 125fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 126fc6daaf9STony Luck ulong flags) 12779442ed1STang Chen { 12879442ed1STang Chen phys_addr_t this_start, this_end, cand; 12979442ed1STang Chen u64 i; 13079442ed1STang Chen 131fc6daaf9STony Luck for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { 13279442ed1STang Chen this_start = clamp(this_start, start, end); 13379442ed1STang Chen this_end = clamp(this_end, start, end); 13479442ed1STang Chen 13579442ed1STang Chen cand = round_up(this_start, align); 13679442ed1STang Chen if (cand < this_end && this_end - cand >= size) 13779442ed1STang Chen return cand; 13879442ed1STang Chen } 13979442ed1STang Chen 14079442ed1STang Chen return 0; 14179442ed1STang Chen } 14279442ed1STang Chen 1437bd0b0f0STejun Heo /** 1441402899eSTang Chen * __memblock_find_range_top_down - find free area utility, in top-down 1451402899eSTang Chen * @start: start of candidate range 1461402899eSTang Chen * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 1471402899eSTang Chen * @size: size of free area to find 1481402899eSTang Chen * @align: alignment of free area to find 149b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 150fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1511402899eSTang Chen * 1521402899eSTang Chen * Utility called from memblock_find_in_range_node(), find free area top-down. 1531402899eSTang Chen * 1541402899eSTang Chen * RETURNS: 15579442ed1STang Chen * Found address on success, 0 on failure. 1561402899eSTang Chen */ 1571402899eSTang Chen static phys_addr_t __init_memblock 1581402899eSTang Chen __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, 159fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 160fc6daaf9STony Luck ulong flags) 1611402899eSTang Chen { 1621402899eSTang Chen phys_addr_t this_start, this_end, cand; 1631402899eSTang Chen u64 i; 1641402899eSTang Chen 165fc6daaf9STony Luck for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, 166fc6daaf9STony Luck NULL) { 1671402899eSTang Chen this_start = clamp(this_start, start, end); 1681402899eSTang Chen this_end = clamp(this_end, start, end); 1691402899eSTang Chen 1701402899eSTang Chen if (this_end < size) 1711402899eSTang Chen continue; 1721402899eSTang Chen 1731402899eSTang Chen cand = round_down(this_end - size, align); 1741402899eSTang Chen if (cand >= this_start) 1751402899eSTang Chen return cand; 1761402899eSTang Chen } 1771402899eSTang Chen 1781402899eSTang Chen return 0; 1791402899eSTang Chen } 1801402899eSTang Chen 1811402899eSTang Chen /** 1827bd0b0f0STejun Heo * memblock_find_in_range_node - find free area in given range and node 1837bd0b0f0STejun Heo * @size: size of free area to find 1847bd0b0f0STejun Heo * @align: alignment of free area to find 18587029ee9SGrygorii Strashko * @start: start of candidate range 18687029ee9SGrygorii Strashko * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 187b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 188fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1897bd0b0f0STejun Heo * 1907bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range and node. 1917bd0b0f0STejun Heo * 19279442ed1STang Chen * When allocation direction is bottom-up, the @start should be greater 19379442ed1STang Chen * than the end of the kernel image. Otherwise, it will be trimmed. The 19479442ed1STang Chen * reason is that we want the bottom-up allocation just near the kernel 19579442ed1STang Chen * image so it is highly likely that the allocated memory and the kernel 19679442ed1STang Chen * will reside in the same node. 19779442ed1STang Chen * 19879442ed1STang Chen * If bottom-up allocation failed, will try to allocate memory top-down. 19979442ed1STang Chen * 2007bd0b0f0STejun Heo * RETURNS: 20179442ed1STang Chen * Found address on success, 0 on failure. 2026ed311b2SBenjamin Herrenschmidt */ 20387029ee9SGrygorii Strashko phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, 20487029ee9SGrygorii Strashko phys_addr_t align, phys_addr_t start, 205fc6daaf9STony Luck phys_addr_t end, int nid, ulong flags) 206f7210e6cSTang Chen { 2070cfb8f0cSTang Chen phys_addr_t kernel_end, ret; 20879442ed1STang Chen 209f7210e6cSTang Chen /* pump up @end */ 210f7210e6cSTang Chen if (end == MEMBLOCK_ALLOC_ACCESSIBLE) 211f7210e6cSTang Chen end = memblock.current_limit; 212f7210e6cSTang Chen 213f7210e6cSTang Chen /* avoid allocating the first page */ 214f7210e6cSTang Chen start = max_t(phys_addr_t, start, PAGE_SIZE); 215f7210e6cSTang Chen end = max(start, end); 21679442ed1STang Chen kernel_end = __pa_symbol(_end); 21779442ed1STang Chen 21879442ed1STang Chen /* 21979442ed1STang Chen * try bottom-up allocation only when bottom-up mode 22079442ed1STang Chen * is set and @end is above the kernel image. 22179442ed1STang Chen */ 22279442ed1STang Chen if (memblock_bottom_up() && end > kernel_end) { 22379442ed1STang Chen phys_addr_t bottom_up_start; 22479442ed1STang Chen 22579442ed1STang Chen /* make sure we will allocate above the kernel */ 22679442ed1STang Chen bottom_up_start = max(start, kernel_end); 22779442ed1STang Chen 22879442ed1STang Chen /* ok, try bottom-up allocation first */ 22979442ed1STang Chen ret = __memblock_find_range_bottom_up(bottom_up_start, end, 230fc6daaf9STony Luck size, align, nid, flags); 23179442ed1STang Chen if (ret) 23279442ed1STang Chen return ret; 23379442ed1STang Chen 23479442ed1STang Chen /* 23579442ed1STang Chen * we always limit bottom-up allocation above the kernel, 23679442ed1STang Chen * but top-down allocation doesn't have the limit, so 23779442ed1STang Chen * retrying top-down allocation may succeed when bottom-up 23879442ed1STang Chen * allocation failed. 23979442ed1STang Chen * 24079442ed1STang Chen * bottom-up allocation is expected to be fail very rarely, 24179442ed1STang Chen * so we use WARN_ONCE() here to see the stack trace if 24279442ed1STang Chen * fail happens. 24379442ed1STang Chen */ 24479442ed1STang Chen WARN_ONCE(1, "memblock: bottom-up allocation failed, " 24579442ed1STang Chen "memory hotunplug may be affected\n"); 24679442ed1STang Chen } 247f7210e6cSTang Chen 248fc6daaf9STony Luck return __memblock_find_range_top_down(start, end, size, align, nid, 249fc6daaf9STony Luck flags); 250f7210e6cSTang Chen } 2516ed311b2SBenjamin Herrenschmidt 2527bd0b0f0STejun Heo /** 2537bd0b0f0STejun Heo * memblock_find_in_range - find free area in given range 2547bd0b0f0STejun Heo * @start: start of candidate range 2557bd0b0f0STejun Heo * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 2567bd0b0f0STejun Heo * @size: size of free area to find 2577bd0b0f0STejun Heo * @align: alignment of free area to find 2587bd0b0f0STejun Heo * 2597bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range. 2607bd0b0f0STejun Heo * 2617bd0b0f0STejun Heo * RETURNS: 26279442ed1STang Chen * Found address on success, 0 on failure. 2637bd0b0f0STejun Heo */ 2647bd0b0f0STejun Heo phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, 2657bd0b0f0STejun Heo phys_addr_t end, phys_addr_t size, 2667bd0b0f0STejun Heo phys_addr_t align) 2677bd0b0f0STejun Heo { 268a3f5bafcSTony Luck phys_addr_t ret; 269a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 270a3f5bafcSTony Luck 271a3f5bafcSTony Luck again: 272a3f5bafcSTony Luck ret = memblock_find_in_range_node(size, align, start, end, 273a3f5bafcSTony Luck NUMA_NO_NODE, flags); 274a3f5bafcSTony Luck 275a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 276a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 277a3f5bafcSTony Luck &size); 278a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 279a3f5bafcSTony Luck goto again; 280a3f5bafcSTony Luck } 281a3f5bafcSTony Luck 282a3f5bafcSTony Luck return ret; 2837bd0b0f0STejun Heo } 2847bd0b0f0STejun Heo 28510d06439SYinghai Lu static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) 28695f72d1eSYinghai Lu { 2871440c4e2STejun Heo type->total_size -= type->regions[r].size; 2887c0caeb8STejun Heo memmove(&type->regions[r], &type->regions[r + 1], 2897c0caeb8STejun Heo (type->cnt - (r + 1)) * sizeof(type->regions[r])); 290e3239ff9SBenjamin Herrenschmidt type->cnt--; 29195f72d1eSYinghai Lu 2928f7a6605SBenjamin Herrenschmidt /* Special case for empty arrays */ 2938f7a6605SBenjamin Herrenschmidt if (type->cnt == 0) { 2941440c4e2STejun Heo WARN_ON(type->total_size != 0); 2958f7a6605SBenjamin Herrenschmidt type->cnt = 1; 2968f7a6605SBenjamin Herrenschmidt type->regions[0].base = 0; 2978f7a6605SBenjamin Herrenschmidt type->regions[0].size = 0; 29866a20757STang Chen type->regions[0].flags = 0; 2997c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 3008f7a6605SBenjamin Herrenschmidt } 30195f72d1eSYinghai Lu } 30295f72d1eSYinghai Lu 303354f17e1SPhilipp Hachtmann #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK 304354f17e1SPhilipp Hachtmann 30529f67386SYinghai Lu phys_addr_t __init_memblock get_allocated_memblock_reserved_regions_info( 30629f67386SYinghai Lu phys_addr_t *addr) 30729f67386SYinghai Lu { 30829f67386SYinghai Lu if (memblock.reserved.regions == memblock_reserved_init_regions) 30929f67386SYinghai Lu return 0; 31029f67386SYinghai Lu 31129f67386SYinghai Lu *addr = __pa(memblock.reserved.regions); 31229f67386SYinghai Lu 31329f67386SYinghai Lu return PAGE_ALIGN(sizeof(struct memblock_region) * 31429f67386SYinghai Lu memblock.reserved.max); 31529f67386SYinghai Lu } 31629f67386SYinghai Lu 3175e270e25SPhilipp Hachtmann phys_addr_t __init_memblock get_allocated_memblock_memory_regions_info( 3185e270e25SPhilipp Hachtmann phys_addr_t *addr) 3195e270e25SPhilipp Hachtmann { 3205e270e25SPhilipp Hachtmann if (memblock.memory.regions == memblock_memory_init_regions) 3215e270e25SPhilipp Hachtmann return 0; 3225e270e25SPhilipp Hachtmann 3235e270e25SPhilipp Hachtmann *addr = __pa(memblock.memory.regions); 3245e270e25SPhilipp Hachtmann 3255e270e25SPhilipp Hachtmann return PAGE_ALIGN(sizeof(struct memblock_region) * 3265e270e25SPhilipp Hachtmann memblock.memory.max); 3275e270e25SPhilipp Hachtmann } 3285e270e25SPhilipp Hachtmann 3295e270e25SPhilipp Hachtmann #endif 3305e270e25SPhilipp Hachtmann 33148c3b583SGreg Pearson /** 33248c3b583SGreg Pearson * memblock_double_array - double the size of the memblock regions array 33348c3b583SGreg Pearson * @type: memblock type of the regions array being doubled 33448c3b583SGreg Pearson * @new_area_start: starting address of memory range to avoid overlap with 33548c3b583SGreg Pearson * @new_area_size: size of memory range to avoid overlap with 33648c3b583SGreg Pearson * 33748c3b583SGreg Pearson * Double the size of the @type regions array. If memblock is being used to 33848c3b583SGreg Pearson * allocate memory for a new reserved regions array and there is a previously 33948c3b583SGreg Pearson * allocated memory range [@new_area_start,@new_area_start+@new_area_size] 34048c3b583SGreg Pearson * waiting to be reserved, ensure the memory used by the new array does 34148c3b583SGreg Pearson * not overlap. 34248c3b583SGreg Pearson * 34348c3b583SGreg Pearson * RETURNS: 34448c3b583SGreg Pearson * 0 on success, -1 on failure. 34548c3b583SGreg Pearson */ 34648c3b583SGreg Pearson static int __init_memblock memblock_double_array(struct memblock_type *type, 34748c3b583SGreg Pearson phys_addr_t new_area_start, 34848c3b583SGreg Pearson phys_addr_t new_area_size) 349142b45a7SBenjamin Herrenschmidt { 350142b45a7SBenjamin Herrenschmidt struct memblock_region *new_array, *old_array; 35129f67386SYinghai Lu phys_addr_t old_alloc_size, new_alloc_size; 352142b45a7SBenjamin Herrenschmidt phys_addr_t old_size, new_size, addr; 353142b45a7SBenjamin Herrenschmidt int use_slab = slab_is_available(); 354181eb394SGavin Shan int *in_slab; 355142b45a7SBenjamin Herrenschmidt 356142b45a7SBenjamin Herrenschmidt /* We don't allow resizing until we know about the reserved regions 357142b45a7SBenjamin Herrenschmidt * of memory that aren't suitable for allocation 358142b45a7SBenjamin Herrenschmidt */ 359142b45a7SBenjamin Herrenschmidt if (!memblock_can_resize) 360142b45a7SBenjamin Herrenschmidt return -1; 361142b45a7SBenjamin Herrenschmidt 362142b45a7SBenjamin Herrenschmidt /* Calculate new doubled size */ 363142b45a7SBenjamin Herrenschmidt old_size = type->max * sizeof(struct memblock_region); 364142b45a7SBenjamin Herrenschmidt new_size = old_size << 1; 36529f67386SYinghai Lu /* 36629f67386SYinghai Lu * We need to allocated new one align to PAGE_SIZE, 36729f67386SYinghai Lu * so we can free them completely later. 36829f67386SYinghai Lu */ 36929f67386SYinghai Lu old_alloc_size = PAGE_ALIGN(old_size); 37029f67386SYinghai Lu new_alloc_size = PAGE_ALIGN(new_size); 371142b45a7SBenjamin Herrenschmidt 372181eb394SGavin Shan /* Retrieve the slab flag */ 373181eb394SGavin Shan if (type == &memblock.memory) 374181eb394SGavin Shan in_slab = &memblock_memory_in_slab; 375181eb394SGavin Shan else 376181eb394SGavin Shan in_slab = &memblock_reserved_in_slab; 377181eb394SGavin Shan 378142b45a7SBenjamin Herrenschmidt /* Try to find some space for it. 379142b45a7SBenjamin Herrenschmidt * 380142b45a7SBenjamin Herrenschmidt * WARNING: We assume that either slab_is_available() and we use it or 381fd07383bSAndrew Morton * we use MEMBLOCK for allocations. That means that this is unsafe to 382fd07383bSAndrew Morton * use when bootmem is currently active (unless bootmem itself is 383fd07383bSAndrew Morton * implemented on top of MEMBLOCK which isn't the case yet) 384142b45a7SBenjamin Herrenschmidt * 385142b45a7SBenjamin Herrenschmidt * This should however not be an issue for now, as we currently only 386fd07383bSAndrew Morton * call into MEMBLOCK while it's still active, or much later when slab 387fd07383bSAndrew Morton * is active for memory hotplug operations 388142b45a7SBenjamin Herrenschmidt */ 389142b45a7SBenjamin Herrenschmidt if (use_slab) { 390142b45a7SBenjamin Herrenschmidt new_array = kmalloc(new_size, GFP_KERNEL); 3911f5026a7STejun Heo addr = new_array ? __pa(new_array) : 0; 3924e2f0775SGavin Shan } else { 39348c3b583SGreg Pearson /* only exclude range when trying to double reserved.regions */ 39448c3b583SGreg Pearson if (type != &memblock.reserved) 39548c3b583SGreg Pearson new_area_start = new_area_size = 0; 39648c3b583SGreg Pearson 39748c3b583SGreg Pearson addr = memblock_find_in_range(new_area_start + new_area_size, 39848c3b583SGreg Pearson memblock.current_limit, 39929f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 40048c3b583SGreg Pearson if (!addr && new_area_size) 40148c3b583SGreg Pearson addr = memblock_find_in_range(0, 40248c3b583SGreg Pearson min(new_area_start, memblock.current_limit), 40329f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 40448c3b583SGreg Pearson 40515674868SSachin Kamat new_array = addr ? __va(addr) : NULL; 4064e2f0775SGavin Shan } 4071f5026a7STejun Heo if (!addr) { 408142b45a7SBenjamin Herrenschmidt pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", 409142b45a7SBenjamin Herrenschmidt memblock_type_name(type), type->max, type->max * 2); 410142b45a7SBenjamin Herrenschmidt return -1; 411142b45a7SBenjamin Herrenschmidt } 412142b45a7SBenjamin Herrenschmidt 413fd07383bSAndrew Morton memblock_dbg("memblock: %s is doubled to %ld at [%#010llx-%#010llx]", 414fd07383bSAndrew Morton memblock_type_name(type), type->max * 2, (u64)addr, 415fd07383bSAndrew Morton (u64)addr + new_size - 1); 416ea9e4376SYinghai Lu 417fd07383bSAndrew Morton /* 418fd07383bSAndrew Morton * Found space, we now need to move the array over before we add the 419fd07383bSAndrew Morton * reserved region since it may be our reserved array itself that is 420fd07383bSAndrew Morton * full. 421142b45a7SBenjamin Herrenschmidt */ 422142b45a7SBenjamin Herrenschmidt memcpy(new_array, type->regions, old_size); 423142b45a7SBenjamin Herrenschmidt memset(new_array + type->max, 0, old_size); 424142b45a7SBenjamin Herrenschmidt old_array = type->regions; 425142b45a7SBenjamin Herrenschmidt type->regions = new_array; 426142b45a7SBenjamin Herrenschmidt type->max <<= 1; 427142b45a7SBenjamin Herrenschmidt 428fd07383bSAndrew Morton /* Free old array. We needn't free it if the array is the static one */ 429181eb394SGavin Shan if (*in_slab) 430181eb394SGavin Shan kfree(old_array); 431181eb394SGavin Shan else if (old_array != memblock_memory_init_regions && 432142b45a7SBenjamin Herrenschmidt old_array != memblock_reserved_init_regions) 43329f67386SYinghai Lu memblock_free(__pa(old_array), old_alloc_size); 434142b45a7SBenjamin Herrenschmidt 435fd07383bSAndrew Morton /* 436fd07383bSAndrew Morton * Reserve the new array if that comes from the memblock. Otherwise, we 437fd07383bSAndrew Morton * needn't do it 438181eb394SGavin Shan */ 439181eb394SGavin Shan if (!use_slab) 44029f67386SYinghai Lu BUG_ON(memblock_reserve(addr, new_alloc_size)); 441181eb394SGavin Shan 442181eb394SGavin Shan /* Update slab flag */ 443181eb394SGavin Shan *in_slab = use_slab; 444181eb394SGavin Shan 445142b45a7SBenjamin Herrenschmidt return 0; 446142b45a7SBenjamin Herrenschmidt } 447142b45a7SBenjamin Herrenschmidt 448784656f9STejun Heo /** 449784656f9STejun Heo * memblock_merge_regions - merge neighboring compatible regions 450784656f9STejun Heo * @type: memblock type to scan 451784656f9STejun Heo * 452784656f9STejun Heo * Scan @type and merge neighboring compatible regions. 453784656f9STejun Heo */ 454784656f9STejun Heo static void __init_memblock memblock_merge_regions(struct memblock_type *type) 455784656f9STejun Heo { 456784656f9STejun Heo int i = 0; 457784656f9STejun Heo 458784656f9STejun Heo /* cnt never goes below 1 */ 459784656f9STejun Heo while (i < type->cnt - 1) { 460784656f9STejun Heo struct memblock_region *this = &type->regions[i]; 461784656f9STejun Heo struct memblock_region *next = &type->regions[i + 1]; 462784656f9STejun Heo 4637c0caeb8STejun Heo if (this->base + this->size != next->base || 4647c0caeb8STejun Heo memblock_get_region_node(this) != 46566a20757STang Chen memblock_get_region_node(next) || 46666a20757STang Chen this->flags != next->flags) { 467784656f9STejun Heo BUG_ON(this->base + this->size > next->base); 468784656f9STejun Heo i++; 469784656f9STejun Heo continue; 470784656f9STejun Heo } 471784656f9STejun Heo 472784656f9STejun Heo this->size += next->size; 473c0232ae8SLin Feng /* move forward from next + 1, index of which is i + 2 */ 474c0232ae8SLin Feng memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); 475784656f9STejun Heo type->cnt--; 476784656f9STejun Heo } 477784656f9STejun Heo } 478784656f9STejun Heo 479784656f9STejun Heo /** 480784656f9STejun Heo * memblock_insert_region - insert new memblock region 481784656f9STejun Heo * @type: memblock type to insert into 482784656f9STejun Heo * @idx: index for the insertion point 483784656f9STejun Heo * @base: base address of the new region 484784656f9STejun Heo * @size: size of the new region 485209ff86dSTang Chen * @nid: node id of the new region 48666a20757STang Chen * @flags: flags of the new region 487784656f9STejun Heo * 488784656f9STejun Heo * Insert new memblock region [@base,@base+@size) into @type at @idx. 489784656f9STejun Heo * @type must already have extra room to accomodate the new region. 490784656f9STejun Heo */ 491784656f9STejun Heo static void __init_memblock memblock_insert_region(struct memblock_type *type, 492784656f9STejun Heo int idx, phys_addr_t base, 49366a20757STang Chen phys_addr_t size, 49466a20757STang Chen int nid, unsigned long flags) 495784656f9STejun Heo { 496784656f9STejun Heo struct memblock_region *rgn = &type->regions[idx]; 497784656f9STejun Heo 498784656f9STejun Heo BUG_ON(type->cnt >= type->max); 499784656f9STejun Heo memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); 500784656f9STejun Heo rgn->base = base; 501784656f9STejun Heo rgn->size = size; 50266a20757STang Chen rgn->flags = flags; 5037c0caeb8STejun Heo memblock_set_region_node(rgn, nid); 504784656f9STejun Heo type->cnt++; 5051440c4e2STejun Heo type->total_size += size; 506784656f9STejun Heo } 507784656f9STejun Heo 508784656f9STejun Heo /** 509f1af9d3aSPhilipp Hachtmann * memblock_add_range - add new memblock region 510784656f9STejun Heo * @type: memblock type to add new region into 511784656f9STejun Heo * @base: base address of the new region 512784656f9STejun Heo * @size: size of the new region 5137fb0bc3fSTejun Heo * @nid: nid of the new region 51466a20757STang Chen * @flags: flags of the new region 515784656f9STejun Heo * 516784656f9STejun Heo * Add new memblock region [@base,@base+@size) into @type. The new region 517784656f9STejun Heo * is allowed to overlap with existing ones - overlaps don't affect already 518784656f9STejun Heo * existing regions. @type is guaranteed to be minimal (all neighbouring 519784656f9STejun Heo * compatible regions are merged) after the addition. 520784656f9STejun Heo * 521784656f9STejun Heo * RETURNS: 522784656f9STejun Heo * 0 on success, -errno on failure. 523784656f9STejun Heo */ 524f1af9d3aSPhilipp Hachtmann int __init_memblock memblock_add_range(struct memblock_type *type, 52566a20757STang Chen phys_addr_t base, phys_addr_t size, 52666a20757STang Chen int nid, unsigned long flags) 52795f72d1eSYinghai Lu { 528784656f9STejun Heo bool insert = false; 529eb18f1b5STejun Heo phys_addr_t obase = base; 530eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 531784656f9STejun Heo int i, nr_new; 53295f72d1eSYinghai Lu 533b3dc627cSTejun Heo if (!size) 534b3dc627cSTejun Heo return 0; 535b3dc627cSTejun Heo 536784656f9STejun Heo /* special case for empty array */ 537784656f9STejun Heo if (type->regions[0].size == 0) { 5381440c4e2STejun Heo WARN_ON(type->cnt != 1 || type->total_size); 539784656f9STejun Heo type->regions[0].base = base; 540784656f9STejun Heo type->regions[0].size = size; 54166a20757STang Chen type->regions[0].flags = flags; 5427fb0bc3fSTejun Heo memblock_set_region_node(&type->regions[0], nid); 5431440c4e2STejun Heo type->total_size = size; 544784656f9STejun Heo return 0; 545784656f9STejun Heo } 546784656f9STejun Heo repeat: 547784656f9STejun Heo /* 548784656f9STejun Heo * The following is executed twice. Once with %false @insert and 549784656f9STejun Heo * then with %true. The first counts the number of regions needed 550784656f9STejun Heo * to accomodate the new area. The second actually inserts them. 551784656f9STejun Heo */ 552784656f9STejun Heo base = obase; 553784656f9STejun Heo nr_new = 0; 554784656f9STejun Heo 5558f7a6605SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 5568f7a6605SBenjamin Herrenschmidt struct memblock_region *rgn = &type->regions[i]; 557784656f9STejun Heo phys_addr_t rbase = rgn->base; 558784656f9STejun Heo phys_addr_t rend = rbase + rgn->size; 5598f7a6605SBenjamin Herrenschmidt 560784656f9STejun Heo if (rbase >= end) 5618f7a6605SBenjamin Herrenschmidt break; 562784656f9STejun Heo if (rend <= base) 563784656f9STejun Heo continue; 564784656f9STejun Heo /* 565784656f9STejun Heo * @rgn overlaps. If it separates the lower part of new 566784656f9STejun Heo * area, insert that portion. 5678f7a6605SBenjamin Herrenschmidt */ 568784656f9STejun Heo if (rbase > base) { 569c0a29498SWei Yang #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 570c0a29498SWei Yang WARN_ON(nid != memblock_get_region_node(rgn)); 571c0a29498SWei Yang #endif 572*4fcab5f4SWei Yang WARN_ON(flags != rgn->flags); 573784656f9STejun Heo nr_new++; 574784656f9STejun Heo if (insert) 575784656f9STejun Heo memblock_insert_region(type, i++, base, 57666a20757STang Chen rbase - base, nid, 57766a20757STang Chen flags); 578784656f9STejun Heo } 579784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 580784656f9STejun Heo base = min(rend, end); 5818f7a6605SBenjamin Herrenschmidt } 5828f7a6605SBenjamin Herrenschmidt 583784656f9STejun Heo /* insert the remaining portion */ 584784656f9STejun Heo if (base < end) { 585784656f9STejun Heo nr_new++; 586784656f9STejun Heo if (insert) 58766a20757STang Chen memblock_insert_region(type, i, base, end - base, 58866a20757STang Chen nid, flags); 5898f7a6605SBenjamin Herrenschmidt } 5908f7a6605SBenjamin Herrenschmidt 591784656f9STejun Heo /* 592784656f9STejun Heo * If this was the first round, resize array and repeat for actual 593784656f9STejun Heo * insertions; otherwise, merge and return. 5948f7a6605SBenjamin Herrenschmidt */ 595784656f9STejun Heo if (!insert) { 596784656f9STejun Heo while (type->cnt + nr_new > type->max) 59748c3b583SGreg Pearson if (memblock_double_array(type, obase, size) < 0) 598784656f9STejun Heo return -ENOMEM; 599784656f9STejun Heo insert = true; 600784656f9STejun Heo goto repeat; 60195f72d1eSYinghai Lu } else { 602784656f9STejun Heo memblock_merge_regions(type); 60395f72d1eSYinghai Lu return 0; 60495f72d1eSYinghai Lu } 605784656f9STejun Heo } 60695f72d1eSYinghai Lu 6077fb0bc3fSTejun Heo int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, 6087fb0bc3fSTejun Heo int nid) 6097fb0bc3fSTejun Heo { 610f1af9d3aSPhilipp Hachtmann return memblock_add_range(&memblock.memory, base, size, nid, 0); 6117fb0bc3fSTejun Heo } 6127fb0bc3fSTejun Heo 6136a4055bcSAlexander Kuleshov static int __init_memblock memblock_add_region(phys_addr_t base, 6146a4055bcSAlexander Kuleshov phys_addr_t size, 6156a4055bcSAlexander Kuleshov int nid, 6166a4055bcSAlexander Kuleshov unsigned long flags) 6176a4055bcSAlexander Kuleshov { 6186a4055bcSAlexander Kuleshov struct memblock_type *_rgn = &memblock.memory; 6196a4055bcSAlexander Kuleshov 6206a4055bcSAlexander Kuleshov memblock_dbg("memblock_add: [%#016llx-%#016llx] flags %#02lx %pF\n", 6216a4055bcSAlexander Kuleshov (unsigned long long)base, 6226a4055bcSAlexander Kuleshov (unsigned long long)base + size - 1, 6236a4055bcSAlexander Kuleshov flags, (void *)_RET_IP_); 6246a4055bcSAlexander Kuleshov 6256a4055bcSAlexander Kuleshov return memblock_add_range(_rgn, base, size, nid, flags); 6266a4055bcSAlexander Kuleshov } 6276a4055bcSAlexander Kuleshov 628581adcbeSTejun Heo int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 62995f72d1eSYinghai Lu { 6306a4055bcSAlexander Kuleshov return memblock_add_region(base, size, MAX_NUMNODES, 0); 63195f72d1eSYinghai Lu } 63295f72d1eSYinghai Lu 6336a9ceb31STejun Heo /** 6346a9ceb31STejun Heo * memblock_isolate_range - isolate given range into disjoint memblocks 6356a9ceb31STejun Heo * @type: memblock type to isolate range for 6366a9ceb31STejun Heo * @base: base of range to isolate 6376a9ceb31STejun Heo * @size: size of range to isolate 6386a9ceb31STejun Heo * @start_rgn: out parameter for the start of isolated region 6396a9ceb31STejun Heo * @end_rgn: out parameter for the end of isolated region 6406a9ceb31STejun Heo * 6416a9ceb31STejun Heo * Walk @type and ensure that regions don't cross the boundaries defined by 6426a9ceb31STejun Heo * [@base,@base+@size). Crossing regions are split at the boundaries, 6436a9ceb31STejun Heo * which may create at most two more regions. The index of the first 6446a9ceb31STejun Heo * region inside the range is returned in *@start_rgn and end in *@end_rgn. 6456a9ceb31STejun Heo * 6466a9ceb31STejun Heo * RETURNS: 6476a9ceb31STejun Heo * 0 on success, -errno on failure. 6486a9ceb31STejun Heo */ 6496a9ceb31STejun Heo static int __init_memblock memblock_isolate_range(struct memblock_type *type, 6506a9ceb31STejun Heo phys_addr_t base, phys_addr_t size, 6516a9ceb31STejun Heo int *start_rgn, int *end_rgn) 6526a9ceb31STejun Heo { 653eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 6546a9ceb31STejun Heo int i; 6556a9ceb31STejun Heo 6566a9ceb31STejun Heo *start_rgn = *end_rgn = 0; 6576a9ceb31STejun Heo 658b3dc627cSTejun Heo if (!size) 659b3dc627cSTejun Heo return 0; 660b3dc627cSTejun Heo 6616a9ceb31STejun Heo /* we'll create at most two more regions */ 6626a9ceb31STejun Heo while (type->cnt + 2 > type->max) 66348c3b583SGreg Pearson if (memblock_double_array(type, base, size) < 0) 6646a9ceb31STejun Heo return -ENOMEM; 6656a9ceb31STejun Heo 6666a9ceb31STejun Heo for (i = 0; i < type->cnt; i++) { 6676a9ceb31STejun Heo struct memblock_region *rgn = &type->regions[i]; 6686a9ceb31STejun Heo phys_addr_t rbase = rgn->base; 6696a9ceb31STejun Heo phys_addr_t rend = rbase + rgn->size; 6706a9ceb31STejun Heo 6716a9ceb31STejun Heo if (rbase >= end) 6726a9ceb31STejun Heo break; 6736a9ceb31STejun Heo if (rend <= base) 6746a9ceb31STejun Heo continue; 6756a9ceb31STejun Heo 6766a9ceb31STejun Heo if (rbase < base) { 6776a9ceb31STejun Heo /* 6786a9ceb31STejun Heo * @rgn intersects from below. Split and continue 6796a9ceb31STejun Heo * to process the next region - the new top half. 6806a9ceb31STejun Heo */ 6816a9ceb31STejun Heo rgn->base = base; 6821440c4e2STejun Heo rgn->size -= base - rbase; 6831440c4e2STejun Heo type->total_size -= base - rbase; 6846a9ceb31STejun Heo memblock_insert_region(type, i, rbase, base - rbase, 68566a20757STang Chen memblock_get_region_node(rgn), 68666a20757STang Chen rgn->flags); 6876a9ceb31STejun Heo } else if (rend > end) { 6886a9ceb31STejun Heo /* 6896a9ceb31STejun Heo * @rgn intersects from above. Split and redo the 6906a9ceb31STejun Heo * current region - the new bottom half. 6916a9ceb31STejun Heo */ 6926a9ceb31STejun Heo rgn->base = end; 6931440c4e2STejun Heo rgn->size -= end - rbase; 6941440c4e2STejun Heo type->total_size -= end - rbase; 6956a9ceb31STejun Heo memblock_insert_region(type, i--, rbase, end - rbase, 69666a20757STang Chen memblock_get_region_node(rgn), 69766a20757STang Chen rgn->flags); 6986a9ceb31STejun Heo } else { 6996a9ceb31STejun Heo /* @rgn is fully contained, record it */ 7006a9ceb31STejun Heo if (!*end_rgn) 7016a9ceb31STejun Heo *start_rgn = i; 7026a9ceb31STejun Heo *end_rgn = i + 1; 7036a9ceb31STejun Heo } 7046a9ceb31STejun Heo } 7056a9ceb31STejun Heo 7066a9ceb31STejun Heo return 0; 7076a9ceb31STejun Heo } 7086a9ceb31STejun Heo 709f1af9d3aSPhilipp Hachtmann int __init_memblock memblock_remove_range(struct memblock_type *type, 7108f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 71195f72d1eSYinghai Lu { 71271936180STejun Heo int start_rgn, end_rgn; 71371936180STejun Heo int i, ret; 71495f72d1eSYinghai Lu 71571936180STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 71671936180STejun Heo if (ret) 71771936180STejun Heo return ret; 71895f72d1eSYinghai Lu 71971936180STejun Heo for (i = end_rgn - 1; i >= start_rgn; i--) 72071936180STejun Heo memblock_remove_region(type, i); 72195f72d1eSYinghai Lu return 0; 72295f72d1eSYinghai Lu } 72395f72d1eSYinghai Lu 724581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 72595f72d1eSYinghai Lu { 726f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.memory, base, size); 72795f72d1eSYinghai Lu } 72895f72d1eSYinghai Lu 729f1af9d3aSPhilipp Hachtmann 730581adcbeSTejun Heo int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) 73195f72d1eSYinghai Lu { 73224aa0788STejun Heo memblock_dbg(" memblock_free: [%#016llx-%#016llx] %pF\n", 733a150439cSH. Peter Anvin (unsigned long long)base, 734931d13f5SGrygorii Strashko (unsigned long long)base + size - 1, 735a150439cSH. Peter Anvin (void *)_RET_IP_); 73624aa0788STejun Heo 737aedf95eaSCatalin Marinas kmemleak_free_part(__va(base), size); 738f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.reserved, base, size); 73995f72d1eSYinghai Lu } 74095f72d1eSYinghai Lu 74166a20757STang Chen static int __init_memblock memblock_reserve_region(phys_addr_t base, 74266a20757STang Chen phys_addr_t size, 74366a20757STang Chen int nid, 74466a20757STang Chen unsigned long flags) 74595f72d1eSYinghai Lu { 7467fc825b4SBaoquan He struct memblock_type *type = &memblock.reserved; 74795f72d1eSYinghai Lu 74866a20757STang Chen memblock_dbg("memblock_reserve: [%#016llx-%#016llx] flags %#02lx %pF\n", 749a150439cSH. Peter Anvin (unsigned long long)base, 750931d13f5SGrygorii Strashko (unsigned long long)base + size - 1, 75166a20757STang Chen flags, (void *)_RET_IP_); 75295f72d1eSYinghai Lu 7537fc825b4SBaoquan He return memblock_add_range(type, base, size, nid, flags); 75466a20757STang Chen } 75566a20757STang Chen 75666a20757STang Chen int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 75766a20757STang Chen { 75866a20757STang Chen return memblock_reserve_region(base, size, MAX_NUMNODES, 0); 75995f72d1eSYinghai Lu } 76095f72d1eSYinghai Lu 76135fd0808STejun Heo /** 76266b16edfSTang Chen * 7634308ce17STony Luck * This function isolates region [@base, @base + @size), and sets/clears flag 76466b16edfSTang Chen * 76566b16edfSTang Chen * Return 0 on succees, -errno on failure. 76666b16edfSTang Chen */ 7674308ce17STony Luck static int __init_memblock memblock_setclr_flag(phys_addr_t base, 7684308ce17STony Luck phys_addr_t size, int set, int flag) 76966b16edfSTang Chen { 77066b16edfSTang Chen struct memblock_type *type = &memblock.memory; 77166b16edfSTang Chen int i, ret, start_rgn, end_rgn; 77266b16edfSTang Chen 77366b16edfSTang Chen ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 77466b16edfSTang Chen if (ret) 77566b16edfSTang Chen return ret; 77666b16edfSTang Chen 77766b16edfSTang Chen for (i = start_rgn; i < end_rgn; i++) 7784308ce17STony Luck if (set) 7794308ce17STony Luck memblock_set_region_flags(&type->regions[i], flag); 7804308ce17STony Luck else 7814308ce17STony Luck memblock_clear_region_flags(&type->regions[i], flag); 78266b16edfSTang Chen 78366b16edfSTang Chen memblock_merge_regions(type); 78466b16edfSTang Chen return 0; 78566b16edfSTang Chen } 78666b16edfSTang Chen 78766b16edfSTang Chen /** 7884308ce17STony Luck * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. 7894308ce17STony Luck * @base: the base phys addr of the region 7904308ce17STony Luck * @size: the size of the region 7914308ce17STony Luck * 7924308ce17STony Luck * Return 0 on succees, -errno on failure. 7934308ce17STony Luck */ 7944308ce17STony Luck int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) 7954308ce17STony Luck { 7964308ce17STony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); 7974308ce17STony Luck } 7984308ce17STony Luck 7994308ce17STony Luck /** 80066b16edfSTang Chen * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. 80166b16edfSTang Chen * @base: the base phys addr of the region 80266b16edfSTang Chen * @size: the size of the region 80366b16edfSTang Chen * 80466b16edfSTang Chen * Return 0 on succees, -errno on failure. 80566b16edfSTang Chen */ 80666b16edfSTang Chen int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) 80766b16edfSTang Chen { 8084308ce17STony Luck return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); 80966b16edfSTang Chen } 81066b16edfSTang Chen 81166b16edfSTang Chen /** 812a3f5bafcSTony Luck * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. 813a3f5bafcSTony Luck * @base: the base phys addr of the region 814a3f5bafcSTony Luck * @size: the size of the region 815a3f5bafcSTony Luck * 816a3f5bafcSTony Luck * Return 0 on succees, -errno on failure. 817a3f5bafcSTony Luck */ 818a3f5bafcSTony Luck int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) 819a3f5bafcSTony Luck { 820a3f5bafcSTony Luck system_has_some_mirror = true; 821a3f5bafcSTony Luck 822a3f5bafcSTony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); 823a3f5bafcSTony Luck } 824a3f5bafcSTony Luck 825a3f5bafcSTony Luck 826a3f5bafcSTony Luck /** 8278e7a7f86SRobin Holt * __next_reserved_mem_region - next function for for_each_reserved_region() 8288e7a7f86SRobin Holt * @idx: pointer to u64 loop variable 8298e7a7f86SRobin Holt * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL 8308e7a7f86SRobin Holt * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL 8318e7a7f86SRobin Holt * 8328e7a7f86SRobin Holt * Iterate over all reserved memory regions. 8338e7a7f86SRobin Holt */ 8348e7a7f86SRobin Holt void __init_memblock __next_reserved_mem_region(u64 *idx, 8358e7a7f86SRobin Holt phys_addr_t *out_start, 8368e7a7f86SRobin Holt phys_addr_t *out_end) 8378e7a7f86SRobin Holt { 8388e7a7f86SRobin Holt struct memblock_type *rsv = &memblock.reserved; 8398e7a7f86SRobin Holt 8408e7a7f86SRobin Holt if (*idx >= 0 && *idx < rsv->cnt) { 8418e7a7f86SRobin Holt struct memblock_region *r = &rsv->regions[*idx]; 8428e7a7f86SRobin Holt phys_addr_t base = r->base; 8438e7a7f86SRobin Holt phys_addr_t size = r->size; 8448e7a7f86SRobin Holt 8458e7a7f86SRobin Holt if (out_start) 8468e7a7f86SRobin Holt *out_start = base; 8478e7a7f86SRobin Holt if (out_end) 8488e7a7f86SRobin Holt *out_end = base + size - 1; 8498e7a7f86SRobin Holt 8508e7a7f86SRobin Holt *idx += 1; 8518e7a7f86SRobin Holt return; 8528e7a7f86SRobin Holt } 8538e7a7f86SRobin Holt 8548e7a7f86SRobin Holt /* signal end of iteration */ 8558e7a7f86SRobin Holt *idx = ULLONG_MAX; 8568e7a7f86SRobin Holt } 8578e7a7f86SRobin Holt 8588e7a7f86SRobin Holt /** 859f1af9d3aSPhilipp Hachtmann * __next__mem_range - next function for for_each_free_mem_range() etc. 86035fd0808STejun Heo * @idx: pointer to u64 loop variable 861b1154233SGrygorii Strashko * @nid: node selector, %NUMA_NO_NODE for all nodes 862fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 863f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 864f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 865dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 866dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 867dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 86835fd0808STejun Heo * 869f1af9d3aSPhilipp Hachtmann * Find the first area from *@idx which matches @nid, fill the out 87035fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 871f1af9d3aSPhilipp Hachtmann * *@idx contains index into type_a and the upper 32bit indexes the 872f1af9d3aSPhilipp Hachtmann * areas before each region in type_b. For example, if type_b regions 87335fd0808STejun Heo * look like the following, 87435fd0808STejun Heo * 87535fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 87635fd0808STejun Heo * 87735fd0808STejun Heo * The upper 32bit indexes the following regions. 87835fd0808STejun Heo * 87935fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 88035fd0808STejun Heo * 88135fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 88235fd0808STejun Heo * in lockstep and returns each intersection. 88335fd0808STejun Heo */ 884fc6daaf9STony Luck void __init_memblock __next_mem_range(u64 *idx, int nid, ulong flags, 885f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 886f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 88735fd0808STejun Heo phys_addr_t *out_start, 88835fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 88935fd0808STejun Heo { 890f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 891f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 892b1154233SGrygorii Strashko 893f1af9d3aSPhilipp Hachtmann if (WARN_ONCE(nid == MAX_NUMNODES, 894f1af9d3aSPhilipp Hachtmann "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 895560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 89635fd0808STejun Heo 897f1af9d3aSPhilipp Hachtmann for (; idx_a < type_a->cnt; idx_a++) { 898f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 899f1af9d3aSPhilipp Hachtmann 90035fd0808STejun Heo phys_addr_t m_start = m->base; 90135fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 902f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 90335fd0808STejun Heo 90435fd0808STejun Heo /* only memory regions are associated with nodes, check it */ 905f1af9d3aSPhilipp Hachtmann if (nid != NUMA_NO_NODE && nid != m_nid) 90635fd0808STejun Heo continue; 90735fd0808STejun Heo 9080a313a99SXishi Qiu /* skip hotpluggable memory regions if needed */ 9090a313a99SXishi Qiu if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 9100a313a99SXishi Qiu continue; 9110a313a99SXishi Qiu 912a3f5bafcSTony Luck /* if we want mirror memory skip non-mirror memory regions */ 913a3f5bafcSTony Luck if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 914a3f5bafcSTony Luck continue; 915a3f5bafcSTony Luck 916f1af9d3aSPhilipp Hachtmann if (!type_b) { 917f1af9d3aSPhilipp Hachtmann if (out_start) 918f1af9d3aSPhilipp Hachtmann *out_start = m_start; 919f1af9d3aSPhilipp Hachtmann if (out_end) 920f1af9d3aSPhilipp Hachtmann *out_end = m_end; 921f1af9d3aSPhilipp Hachtmann if (out_nid) 922f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 923f1af9d3aSPhilipp Hachtmann idx_a++; 924f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 925f1af9d3aSPhilipp Hachtmann return; 926f1af9d3aSPhilipp Hachtmann } 92735fd0808STejun Heo 928f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 929f1af9d3aSPhilipp Hachtmann for (; idx_b < type_b->cnt + 1; idx_b++) { 930f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 931f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 932f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 933f1af9d3aSPhilipp Hachtmann 934f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 935f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 936f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 937f1af9d3aSPhilipp Hachtmann r->base : ULLONG_MAX; 938f1af9d3aSPhilipp Hachtmann 939f1af9d3aSPhilipp Hachtmann /* 940f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 941f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 942f1af9d3aSPhilipp Hachtmann */ 94335fd0808STejun Heo if (r_start >= m_end) 94435fd0808STejun Heo break; 94535fd0808STejun Heo /* if the two regions intersect, we're done */ 94635fd0808STejun Heo if (m_start < r_end) { 94735fd0808STejun Heo if (out_start) 948f1af9d3aSPhilipp Hachtmann *out_start = 949f1af9d3aSPhilipp Hachtmann max(m_start, r_start); 95035fd0808STejun Heo if (out_end) 95135fd0808STejun Heo *out_end = min(m_end, r_end); 95235fd0808STejun Heo if (out_nid) 953f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 95435fd0808STejun Heo /* 955f1af9d3aSPhilipp Hachtmann * The region which ends first is 956f1af9d3aSPhilipp Hachtmann * advanced for the next iteration. 95735fd0808STejun Heo */ 95835fd0808STejun Heo if (m_end <= r_end) 959f1af9d3aSPhilipp Hachtmann idx_a++; 96035fd0808STejun Heo else 961f1af9d3aSPhilipp Hachtmann idx_b++; 962f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 96335fd0808STejun Heo return; 96435fd0808STejun Heo } 96535fd0808STejun Heo } 96635fd0808STejun Heo } 96735fd0808STejun Heo 96835fd0808STejun Heo /* signal end of iteration */ 96935fd0808STejun Heo *idx = ULLONG_MAX; 97035fd0808STejun Heo } 97135fd0808STejun Heo 9727bd0b0f0STejun Heo /** 973f1af9d3aSPhilipp Hachtmann * __next_mem_range_rev - generic next function for for_each_*_range_rev() 974f1af9d3aSPhilipp Hachtmann * 975f1af9d3aSPhilipp Hachtmann * Finds the next range from type_a which is not marked as unsuitable 976f1af9d3aSPhilipp Hachtmann * in type_b. 977f1af9d3aSPhilipp Hachtmann * 9787bd0b0f0STejun Heo * @idx: pointer to u64 loop variable 979b1154233SGrygorii Strashko * @nid: nid: node selector, %NUMA_NO_NODE for all nodes 980fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 981f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 982f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 983dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 984dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 985dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 9867bd0b0f0STejun Heo * 987f1af9d3aSPhilipp Hachtmann * Reverse of __next_mem_range(). 9887bd0b0f0STejun Heo */ 989fc6daaf9STony Luck void __init_memblock __next_mem_range_rev(u64 *idx, int nid, ulong flags, 990f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 991f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 9927bd0b0f0STejun Heo phys_addr_t *out_start, 9937bd0b0f0STejun Heo phys_addr_t *out_end, int *out_nid) 9947bd0b0f0STejun Heo { 995f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 996f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 997b1154233SGrygorii Strashko 998560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 999560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 10007bd0b0f0STejun Heo 10017bd0b0f0STejun Heo if (*idx == (u64)ULLONG_MAX) { 1002f1af9d3aSPhilipp Hachtmann idx_a = type_a->cnt - 1; 1003f1af9d3aSPhilipp Hachtmann idx_b = type_b->cnt; 10047bd0b0f0STejun Heo } 10057bd0b0f0STejun Heo 1006f1af9d3aSPhilipp Hachtmann for (; idx_a >= 0; idx_a--) { 1007f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1008f1af9d3aSPhilipp Hachtmann 10097bd0b0f0STejun Heo phys_addr_t m_start = m->base; 10107bd0b0f0STejun Heo phys_addr_t m_end = m->base + m->size; 1011f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 10127bd0b0f0STejun Heo 10137bd0b0f0STejun Heo /* only memory regions are associated with nodes, check it */ 1014f1af9d3aSPhilipp Hachtmann if (nid != NUMA_NO_NODE && nid != m_nid) 10157bd0b0f0STejun Heo continue; 10167bd0b0f0STejun Heo 101755ac590cSTang Chen /* skip hotpluggable memory regions if needed */ 101855ac590cSTang Chen if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 101955ac590cSTang Chen continue; 102055ac590cSTang Chen 1021a3f5bafcSTony Luck /* if we want mirror memory skip non-mirror memory regions */ 1022a3f5bafcSTony Luck if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 1023a3f5bafcSTony Luck continue; 1024a3f5bafcSTony Luck 1025f1af9d3aSPhilipp Hachtmann if (!type_b) { 1026f1af9d3aSPhilipp Hachtmann if (out_start) 1027f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1028f1af9d3aSPhilipp Hachtmann if (out_end) 1029f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1030f1af9d3aSPhilipp Hachtmann if (out_nid) 1031f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1032f1af9d3aSPhilipp Hachtmann idx_a++; 1033f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1034f1af9d3aSPhilipp Hachtmann return; 1035f1af9d3aSPhilipp Hachtmann } 10367bd0b0f0STejun Heo 1037f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1038f1af9d3aSPhilipp Hachtmann for (; idx_b >= 0; idx_b--) { 1039f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1040f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1041f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1042f1af9d3aSPhilipp Hachtmann 1043f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1044f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1045f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 1046f1af9d3aSPhilipp Hachtmann r->base : ULLONG_MAX; 1047f1af9d3aSPhilipp Hachtmann /* 1048f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1049f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1050f1af9d3aSPhilipp Hachtmann */ 1051f1af9d3aSPhilipp Hachtmann 10527bd0b0f0STejun Heo if (r_end <= m_start) 10537bd0b0f0STejun Heo break; 10547bd0b0f0STejun Heo /* if the two regions intersect, we're done */ 10557bd0b0f0STejun Heo if (m_end > r_start) { 10567bd0b0f0STejun Heo if (out_start) 10577bd0b0f0STejun Heo *out_start = max(m_start, r_start); 10587bd0b0f0STejun Heo if (out_end) 10597bd0b0f0STejun Heo *out_end = min(m_end, r_end); 10607bd0b0f0STejun Heo if (out_nid) 1061f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 10627bd0b0f0STejun Heo if (m_start >= r_start) 1063f1af9d3aSPhilipp Hachtmann idx_a--; 10647bd0b0f0STejun Heo else 1065f1af9d3aSPhilipp Hachtmann idx_b--; 1066f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 10677bd0b0f0STejun Heo return; 10687bd0b0f0STejun Heo } 10697bd0b0f0STejun Heo } 10707bd0b0f0STejun Heo } 1071f1af9d3aSPhilipp Hachtmann /* signal end of iteration */ 10727bd0b0f0STejun Heo *idx = ULLONG_MAX; 10737bd0b0f0STejun Heo } 10747bd0b0f0STejun Heo 10757c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 10767c0caeb8STejun Heo /* 10777c0caeb8STejun Heo * Common iterator interface used to define for_each_mem_range(). 10787c0caeb8STejun Heo */ 10797c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 10807c0caeb8STejun Heo unsigned long *out_start_pfn, 10817c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 10827c0caeb8STejun Heo { 10837c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 10847c0caeb8STejun Heo struct memblock_region *r; 10857c0caeb8STejun Heo 10867c0caeb8STejun Heo while (++*idx < type->cnt) { 10877c0caeb8STejun Heo r = &type->regions[*idx]; 10887c0caeb8STejun Heo 10897c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 10907c0caeb8STejun Heo continue; 10917c0caeb8STejun Heo if (nid == MAX_NUMNODES || nid == r->nid) 10927c0caeb8STejun Heo break; 10937c0caeb8STejun Heo } 10947c0caeb8STejun Heo if (*idx >= type->cnt) { 10957c0caeb8STejun Heo *idx = -1; 10967c0caeb8STejun Heo return; 10977c0caeb8STejun Heo } 10987c0caeb8STejun Heo 10997c0caeb8STejun Heo if (out_start_pfn) 11007c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 11017c0caeb8STejun Heo if (out_end_pfn) 11027c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 11037c0caeb8STejun Heo if (out_nid) 11047c0caeb8STejun Heo *out_nid = r->nid; 11057c0caeb8STejun Heo } 11067c0caeb8STejun Heo 11077c0caeb8STejun Heo /** 11087c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 11097c0caeb8STejun Heo * @base: base of area to set node ID for 11107c0caeb8STejun Heo * @size: size of area to set node ID for 1111e7e8de59STang Chen * @type: memblock type to set node ID for 11127c0caeb8STejun Heo * @nid: node ID to set 11137c0caeb8STejun Heo * 1114e7e8de59STang Chen * Set the nid of memblock @type regions in [@base,@base+@size) to @nid. 11157c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 11167c0caeb8STejun Heo * 11177c0caeb8STejun Heo * RETURNS: 11187c0caeb8STejun Heo * 0 on success, -errno on failure. 11197c0caeb8STejun Heo */ 11207c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 1121e7e8de59STang Chen struct memblock_type *type, int nid) 11227c0caeb8STejun Heo { 11236a9ceb31STejun Heo int start_rgn, end_rgn; 11246a9ceb31STejun Heo int i, ret; 11257c0caeb8STejun Heo 11266a9ceb31STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 11276a9ceb31STejun Heo if (ret) 11286a9ceb31STejun Heo return ret; 11297c0caeb8STejun Heo 11306a9ceb31STejun Heo for (i = start_rgn; i < end_rgn; i++) 1131e9d24ad3SWanpeng Li memblock_set_region_node(&type->regions[i], nid); 11327c0caeb8STejun Heo 11337c0caeb8STejun Heo memblock_merge_regions(type); 11347c0caeb8STejun Heo return 0; 11357c0caeb8STejun Heo } 11367c0caeb8STejun Heo #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ 11377c0caeb8STejun Heo 11382bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, 11392bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t start, 1140fc6daaf9STony Luck phys_addr_t end, int nid, ulong flags) 114195f72d1eSYinghai Lu { 11426ed311b2SBenjamin Herrenschmidt phys_addr_t found; 114395f72d1eSYinghai Lu 114479f40fabSGrygorii Strashko if (!align) 114579f40fabSGrygorii Strashko align = SMP_CACHE_BYTES; 114694f3d3afSVineet Gupta 1147fc6daaf9STony Luck found = memblock_find_in_range_node(size, align, start, end, nid, 1148fc6daaf9STony Luck flags); 1149aedf95eaSCatalin Marinas if (found && !memblock_reserve(found, size)) { 1150aedf95eaSCatalin Marinas /* 1151aedf95eaSCatalin Marinas * The min_count is set to 0 so that memblock allocations are 1152aedf95eaSCatalin Marinas * never reported as leaks. 1153aedf95eaSCatalin Marinas */ 1154aedf95eaSCatalin Marinas kmemleak_alloc(__va(found), size, 0, 0); 11556ed311b2SBenjamin Herrenschmidt return found; 1156aedf95eaSCatalin Marinas } 11576ed311b2SBenjamin Herrenschmidt return 0; 115895f72d1eSYinghai Lu } 115995f72d1eSYinghai Lu 11602bfc2862SAkinobu Mita phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, 1161fc6daaf9STony Luck phys_addr_t start, phys_addr_t end, 1162fc6daaf9STony Luck ulong flags) 11632bfc2862SAkinobu Mita { 1164fc6daaf9STony Luck return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, 1165fc6daaf9STony Luck flags); 11662bfc2862SAkinobu Mita } 11672bfc2862SAkinobu Mita 11682bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size, 11692bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t max_addr, 1170fc6daaf9STony Luck int nid, ulong flags) 11712bfc2862SAkinobu Mita { 1172fc6daaf9STony Luck return memblock_alloc_range_nid(size, align, 0, max_addr, nid, flags); 11732bfc2862SAkinobu Mita } 11742bfc2862SAkinobu Mita 11757bd0b0f0STejun Heo phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) 11767bd0b0f0STejun Heo { 1177a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 1178a3f5bafcSTony Luck phys_addr_t ret; 1179a3f5bafcSTony Luck 1180a3f5bafcSTony Luck again: 1181a3f5bafcSTony Luck ret = memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, 1182a3f5bafcSTony Luck nid, flags); 1183a3f5bafcSTony Luck 1184a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 1185a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 1186a3f5bafcSTony Luck goto again; 1187a3f5bafcSTony Luck } 1188a3f5bafcSTony Luck return ret; 11897bd0b0f0STejun Heo } 11907bd0b0f0STejun Heo 11917bd0b0f0STejun Heo phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 11927bd0b0f0STejun Heo { 1193fc6daaf9STony Luck return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE, 1194fc6daaf9STony Luck MEMBLOCK_NONE); 11957bd0b0f0STejun Heo } 11967bd0b0f0STejun Heo 11976ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 119895f72d1eSYinghai Lu { 11996ed311b2SBenjamin Herrenschmidt phys_addr_t alloc; 12006ed311b2SBenjamin Herrenschmidt 12016ed311b2SBenjamin Herrenschmidt alloc = __memblock_alloc_base(size, align, max_addr); 12026ed311b2SBenjamin Herrenschmidt 12036ed311b2SBenjamin Herrenschmidt if (alloc == 0) 12046ed311b2SBenjamin Herrenschmidt panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n", 12056ed311b2SBenjamin Herrenschmidt (unsigned long long) size, (unsigned long long) max_addr); 12066ed311b2SBenjamin Herrenschmidt 12076ed311b2SBenjamin Herrenschmidt return alloc; 120895f72d1eSYinghai Lu } 120995f72d1eSYinghai Lu 12106ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) 121195f72d1eSYinghai Lu { 12126ed311b2SBenjamin Herrenschmidt return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 121395f72d1eSYinghai Lu } 121495f72d1eSYinghai Lu 12159d1e2492SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 12169d1e2492SBenjamin Herrenschmidt { 12179d1e2492SBenjamin Herrenschmidt phys_addr_t res = memblock_alloc_nid(size, align, nid); 12189d1e2492SBenjamin Herrenschmidt 12199d1e2492SBenjamin Herrenschmidt if (res) 12209d1e2492SBenjamin Herrenschmidt return res; 122115fb0972STejun Heo return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 122295f72d1eSYinghai Lu } 122395f72d1eSYinghai Lu 122426f09e9bSSantosh Shilimkar /** 122526f09e9bSSantosh Shilimkar * memblock_virt_alloc_internal - allocate boot memory block 122626f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 122726f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 122826f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region to allocate (phys address) 122926f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region to allocate (phys address) 123026f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 123126f09e9bSSantosh Shilimkar * 123226f09e9bSSantosh Shilimkar * The @min_addr limit is dropped if it can not be satisfied and the allocation 123326f09e9bSSantosh Shilimkar * will fall back to memory below @min_addr. Also, allocation may fall back 123426f09e9bSSantosh Shilimkar * to any node in the system if the specified node can not 123526f09e9bSSantosh Shilimkar * hold the requested memory. 123626f09e9bSSantosh Shilimkar * 123726f09e9bSSantosh Shilimkar * The allocation is performed from memory region limited by 123826f09e9bSSantosh Shilimkar * memblock.current_limit if @max_addr == %BOOTMEM_ALLOC_ACCESSIBLE. 123926f09e9bSSantosh Shilimkar * 124026f09e9bSSantosh Shilimkar * The memory block is aligned on SMP_CACHE_BYTES if @align == 0. 124126f09e9bSSantosh Shilimkar * 124226f09e9bSSantosh Shilimkar * The phys address of allocated boot memory block is converted to virtual and 124326f09e9bSSantosh Shilimkar * allocated memory is reset to 0. 124426f09e9bSSantosh Shilimkar * 124526f09e9bSSantosh Shilimkar * In addition, function sets the min_count to 0 using kmemleak_alloc for 124626f09e9bSSantosh Shilimkar * allocated boot memory block, so that it is never reported as leaks. 124726f09e9bSSantosh Shilimkar * 124826f09e9bSSantosh Shilimkar * RETURNS: 124926f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 125026f09e9bSSantosh Shilimkar */ 125126f09e9bSSantosh Shilimkar static void * __init memblock_virt_alloc_internal( 125226f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 125326f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 125426f09e9bSSantosh Shilimkar int nid) 125526f09e9bSSantosh Shilimkar { 125626f09e9bSSantosh Shilimkar phys_addr_t alloc; 125726f09e9bSSantosh Shilimkar void *ptr; 1258a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 125926f09e9bSSantosh Shilimkar 1260560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1261560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 126226f09e9bSSantosh Shilimkar 126326f09e9bSSantosh Shilimkar /* 126426f09e9bSSantosh Shilimkar * Detect any accidental use of these APIs after slab is ready, as at 126526f09e9bSSantosh Shilimkar * this moment memblock may be deinitialized already and its 126626f09e9bSSantosh Shilimkar * internal data may be destroyed (after execution of free_all_bootmem) 126726f09e9bSSantosh Shilimkar */ 126826f09e9bSSantosh Shilimkar if (WARN_ON_ONCE(slab_is_available())) 126926f09e9bSSantosh Shilimkar return kzalloc_node(size, GFP_NOWAIT, nid); 127026f09e9bSSantosh Shilimkar 127126f09e9bSSantosh Shilimkar if (!align) 127226f09e9bSSantosh Shilimkar align = SMP_CACHE_BYTES; 127326f09e9bSSantosh Shilimkar 1274f544e14fSYinghai Lu if (max_addr > memblock.current_limit) 1275f544e14fSYinghai Lu max_addr = memblock.current_limit; 1276f544e14fSYinghai Lu 127726f09e9bSSantosh Shilimkar again: 127826f09e9bSSantosh Shilimkar alloc = memblock_find_in_range_node(size, align, min_addr, max_addr, 1279a3f5bafcSTony Luck nid, flags); 128026f09e9bSSantosh Shilimkar if (alloc) 128126f09e9bSSantosh Shilimkar goto done; 128226f09e9bSSantosh Shilimkar 128326f09e9bSSantosh Shilimkar if (nid != NUMA_NO_NODE) { 128426f09e9bSSantosh Shilimkar alloc = memblock_find_in_range_node(size, align, min_addr, 1285fc6daaf9STony Luck max_addr, NUMA_NO_NODE, 1286a3f5bafcSTony Luck flags); 128726f09e9bSSantosh Shilimkar if (alloc) 128826f09e9bSSantosh Shilimkar goto done; 128926f09e9bSSantosh Shilimkar } 129026f09e9bSSantosh Shilimkar 129126f09e9bSSantosh Shilimkar if (min_addr) { 129226f09e9bSSantosh Shilimkar min_addr = 0; 129326f09e9bSSantosh Shilimkar goto again; 129426f09e9bSSantosh Shilimkar } 129526f09e9bSSantosh Shilimkar 1296a3f5bafcSTony Luck if (flags & MEMBLOCK_MIRROR) { 1297a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 1298a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 1299a3f5bafcSTony Luck &size); 1300a3f5bafcSTony Luck goto again; 1301a3f5bafcSTony Luck } 1302a3f5bafcSTony Luck 1303a3f5bafcSTony Luck return NULL; 130426f09e9bSSantosh Shilimkar done: 130526f09e9bSSantosh Shilimkar memblock_reserve(alloc, size); 130626f09e9bSSantosh Shilimkar ptr = phys_to_virt(alloc); 130726f09e9bSSantosh Shilimkar memset(ptr, 0, size); 130826f09e9bSSantosh Shilimkar 130926f09e9bSSantosh Shilimkar /* 131026f09e9bSSantosh Shilimkar * The min_count is set to 0 so that bootmem allocated blocks 131126f09e9bSSantosh Shilimkar * are never reported as leaks. This is because many of these blocks 131226f09e9bSSantosh Shilimkar * are only referred via the physical address which is not 131326f09e9bSSantosh Shilimkar * looked up by kmemleak. 131426f09e9bSSantosh Shilimkar */ 131526f09e9bSSantosh Shilimkar kmemleak_alloc(ptr, size, 0, 0); 131626f09e9bSSantosh Shilimkar 131726f09e9bSSantosh Shilimkar return ptr; 131826f09e9bSSantosh Shilimkar } 131926f09e9bSSantosh Shilimkar 132026f09e9bSSantosh Shilimkar /** 132126f09e9bSSantosh Shilimkar * memblock_virt_alloc_try_nid_nopanic - allocate boot memory block 132226f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 132326f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 132426f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 132526f09e9bSSantosh Shilimkar * is preferred (phys address) 132626f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 132726f09e9bSSantosh Shilimkar * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to 132826f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 132926f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 133026f09e9bSSantosh Shilimkar * 133126f09e9bSSantosh Shilimkar * Public version of _memblock_virt_alloc_try_nid_nopanic() which provides 133226f09e9bSSantosh Shilimkar * additional debug information (including caller info), if enabled. 133326f09e9bSSantosh Shilimkar * 133426f09e9bSSantosh Shilimkar * RETURNS: 133526f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 133626f09e9bSSantosh Shilimkar */ 133726f09e9bSSantosh Shilimkar void * __init memblock_virt_alloc_try_nid_nopanic( 133826f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 133926f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 134026f09e9bSSantosh Shilimkar int nid) 134126f09e9bSSantosh Shilimkar { 134226f09e9bSSantosh Shilimkar memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", 134326f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 134426f09e9bSSantosh Shilimkar (u64)max_addr, (void *)_RET_IP_); 134526f09e9bSSantosh Shilimkar return memblock_virt_alloc_internal(size, align, min_addr, 134626f09e9bSSantosh Shilimkar max_addr, nid); 134726f09e9bSSantosh Shilimkar } 134826f09e9bSSantosh Shilimkar 134926f09e9bSSantosh Shilimkar /** 135026f09e9bSSantosh Shilimkar * memblock_virt_alloc_try_nid - allocate boot memory block with panicking 135126f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 135226f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 135326f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 135426f09e9bSSantosh Shilimkar * is preferred (phys address) 135526f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 135626f09e9bSSantosh Shilimkar * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to 135726f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 135826f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 135926f09e9bSSantosh Shilimkar * 136026f09e9bSSantosh Shilimkar * Public panicking version of _memblock_virt_alloc_try_nid_nopanic() 136126f09e9bSSantosh Shilimkar * which provides debug information (including caller info), if enabled, 136226f09e9bSSantosh Shilimkar * and panics if the request can not be satisfied. 136326f09e9bSSantosh Shilimkar * 136426f09e9bSSantosh Shilimkar * RETURNS: 136526f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 136626f09e9bSSantosh Shilimkar */ 136726f09e9bSSantosh Shilimkar void * __init memblock_virt_alloc_try_nid( 136826f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 136926f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 137026f09e9bSSantosh Shilimkar int nid) 137126f09e9bSSantosh Shilimkar { 137226f09e9bSSantosh Shilimkar void *ptr; 137326f09e9bSSantosh Shilimkar 137426f09e9bSSantosh Shilimkar memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", 137526f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 137626f09e9bSSantosh Shilimkar (u64)max_addr, (void *)_RET_IP_); 137726f09e9bSSantosh Shilimkar ptr = memblock_virt_alloc_internal(size, align, 137826f09e9bSSantosh Shilimkar min_addr, max_addr, nid); 137926f09e9bSSantosh Shilimkar if (ptr) 138026f09e9bSSantosh Shilimkar return ptr; 138126f09e9bSSantosh Shilimkar 138226f09e9bSSantosh Shilimkar panic("%s: Failed to allocate %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx\n", 138326f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 138426f09e9bSSantosh Shilimkar (u64)max_addr); 138526f09e9bSSantosh Shilimkar return NULL; 138626f09e9bSSantosh Shilimkar } 138726f09e9bSSantosh Shilimkar 138826f09e9bSSantosh Shilimkar /** 138926f09e9bSSantosh Shilimkar * __memblock_free_early - free boot memory block 139026f09e9bSSantosh Shilimkar * @base: phys starting address of the boot memory block 139126f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 139226f09e9bSSantosh Shilimkar * 139326f09e9bSSantosh Shilimkar * Free boot memory block previously allocated by memblock_virt_alloc_xx() API. 139426f09e9bSSantosh Shilimkar * The freeing memory will not be released to the buddy allocator. 139526f09e9bSSantosh Shilimkar */ 139626f09e9bSSantosh Shilimkar void __init __memblock_free_early(phys_addr_t base, phys_addr_t size) 139726f09e9bSSantosh Shilimkar { 139826f09e9bSSantosh Shilimkar memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", 139926f09e9bSSantosh Shilimkar __func__, (u64)base, (u64)base + size - 1, 140026f09e9bSSantosh Shilimkar (void *)_RET_IP_); 140126f09e9bSSantosh Shilimkar kmemleak_free_part(__va(base), size); 1402f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, base, size); 140326f09e9bSSantosh Shilimkar } 140426f09e9bSSantosh Shilimkar 140526f09e9bSSantosh Shilimkar /* 140626f09e9bSSantosh Shilimkar * __memblock_free_late - free bootmem block pages directly to buddy allocator 140726f09e9bSSantosh Shilimkar * @addr: phys starting address of the boot memory block 140826f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 140926f09e9bSSantosh Shilimkar * 141026f09e9bSSantosh Shilimkar * This is only useful when the bootmem allocator has already been torn 141126f09e9bSSantosh Shilimkar * down, but we are still initializing the system. Pages are released directly 141226f09e9bSSantosh Shilimkar * to the buddy allocator, no bootmem metadata is updated because it is gone. 141326f09e9bSSantosh Shilimkar */ 141426f09e9bSSantosh Shilimkar void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) 141526f09e9bSSantosh Shilimkar { 141626f09e9bSSantosh Shilimkar u64 cursor, end; 141726f09e9bSSantosh Shilimkar 141826f09e9bSSantosh Shilimkar memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", 141926f09e9bSSantosh Shilimkar __func__, (u64)base, (u64)base + size - 1, 142026f09e9bSSantosh Shilimkar (void *)_RET_IP_); 142126f09e9bSSantosh Shilimkar kmemleak_free_part(__va(base), size); 142226f09e9bSSantosh Shilimkar cursor = PFN_UP(base); 142326f09e9bSSantosh Shilimkar end = PFN_DOWN(base + size); 142426f09e9bSSantosh Shilimkar 142526f09e9bSSantosh Shilimkar for (; cursor < end; cursor++) { 1426d70ddd7aSMel Gorman __free_pages_bootmem(pfn_to_page(cursor), cursor, 0); 142726f09e9bSSantosh Shilimkar totalram_pages++; 142826f09e9bSSantosh Shilimkar } 142926f09e9bSSantosh Shilimkar } 14309d1e2492SBenjamin Herrenschmidt 14319d1e2492SBenjamin Herrenschmidt /* 14329d1e2492SBenjamin Herrenschmidt * Remaining API functions 14339d1e2492SBenjamin Herrenschmidt */ 14349d1e2492SBenjamin Herrenschmidt 14352898cc4cSBenjamin Herrenschmidt phys_addr_t __init memblock_phys_mem_size(void) 143695f72d1eSYinghai Lu { 14371440c4e2STejun Heo return memblock.memory.total_size; 143895f72d1eSYinghai Lu } 143995f72d1eSYinghai Lu 1440595ad9afSYinghai Lu phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) 1441595ad9afSYinghai Lu { 1442595ad9afSYinghai Lu unsigned long pages = 0; 1443595ad9afSYinghai Lu struct memblock_region *r; 1444595ad9afSYinghai Lu unsigned long start_pfn, end_pfn; 1445595ad9afSYinghai Lu 1446595ad9afSYinghai Lu for_each_memblock(memory, r) { 1447595ad9afSYinghai Lu start_pfn = memblock_region_memory_base_pfn(r); 1448595ad9afSYinghai Lu end_pfn = memblock_region_memory_end_pfn(r); 1449595ad9afSYinghai Lu start_pfn = min_t(unsigned long, start_pfn, limit_pfn); 1450595ad9afSYinghai Lu end_pfn = min_t(unsigned long, end_pfn, limit_pfn); 1451595ad9afSYinghai Lu pages += end_pfn - start_pfn; 1452595ad9afSYinghai Lu } 1453595ad9afSYinghai Lu 145416763230SFabian Frederick return PFN_PHYS(pages); 1455595ad9afSYinghai Lu } 1456595ad9afSYinghai Lu 14570a93ebefSSam Ravnborg /* lowest address */ 14580a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 14590a93ebefSSam Ravnborg { 14600a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 14610a93ebefSSam Ravnborg } 14620a93ebefSSam Ravnborg 146310d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 146495f72d1eSYinghai Lu { 146595f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 146695f72d1eSYinghai Lu 1467e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 146895f72d1eSYinghai Lu } 146995f72d1eSYinghai Lu 1470c0ce8fefSTejun Heo void __init memblock_enforce_memory_limit(phys_addr_t limit) 147195f72d1eSYinghai Lu { 1472c0ce8fefSTejun Heo phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; 1473136199f0SEmil Medve struct memblock_region *r; 147495f72d1eSYinghai Lu 1475c0ce8fefSTejun Heo if (!limit) 147695f72d1eSYinghai Lu return; 147795f72d1eSYinghai Lu 1478c0ce8fefSTejun Heo /* find out max address */ 1479136199f0SEmil Medve for_each_memblock(memory, r) { 1480c0ce8fefSTejun Heo if (limit <= r->size) { 1481c0ce8fefSTejun Heo max_addr = r->base + limit; 148295f72d1eSYinghai Lu break; 148395f72d1eSYinghai Lu } 1484c0ce8fefSTejun Heo limit -= r->size; 148595f72d1eSYinghai Lu } 1486c0ce8fefSTejun Heo 1487c0ce8fefSTejun Heo /* truncate both memory and reserved regions */ 1488f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.memory, max_addr, 1489f1af9d3aSPhilipp Hachtmann (phys_addr_t)ULLONG_MAX); 1490f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, max_addr, 1491f1af9d3aSPhilipp Hachtmann (phys_addr_t)ULLONG_MAX); 149295f72d1eSYinghai Lu } 149395f72d1eSYinghai Lu 1494cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 149572d4b0b4SBenjamin Herrenschmidt { 149672d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 149772d4b0b4SBenjamin Herrenschmidt 149872d4b0b4SBenjamin Herrenschmidt do { 149972d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 150072d4b0b4SBenjamin Herrenschmidt 150172d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 150272d4b0b4SBenjamin Herrenschmidt right = mid; 150372d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 150472d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 150572d4b0b4SBenjamin Herrenschmidt left = mid + 1; 150672d4b0b4SBenjamin Herrenschmidt else 150772d4b0b4SBenjamin Herrenschmidt return mid; 150872d4b0b4SBenjamin Herrenschmidt } while (left < right); 150972d4b0b4SBenjamin Herrenschmidt return -1; 151072d4b0b4SBenjamin Herrenschmidt } 151172d4b0b4SBenjamin Herrenschmidt 15122898cc4cSBenjamin Herrenschmidt int __init memblock_is_reserved(phys_addr_t addr) 151395f72d1eSYinghai Lu { 151472d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 151595f72d1eSYinghai Lu } 151672d4b0b4SBenjamin Herrenschmidt 15173661ca66SYinghai Lu int __init_memblock memblock_is_memory(phys_addr_t addr) 151872d4b0b4SBenjamin Herrenschmidt { 151972d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 152072d4b0b4SBenjamin Herrenschmidt } 152172d4b0b4SBenjamin Herrenschmidt 1522e76b63f8SYinghai Lu #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 1523e76b63f8SYinghai Lu int __init_memblock memblock_search_pfn_nid(unsigned long pfn, 1524e76b63f8SYinghai Lu unsigned long *start_pfn, unsigned long *end_pfn) 1525e76b63f8SYinghai Lu { 1526e76b63f8SYinghai Lu struct memblock_type *type = &memblock.memory; 152716763230SFabian Frederick int mid = memblock_search(type, PFN_PHYS(pfn)); 1528e76b63f8SYinghai Lu 1529e76b63f8SYinghai Lu if (mid == -1) 1530e76b63f8SYinghai Lu return -1; 1531e76b63f8SYinghai Lu 1532f7e2f7e8SFabian Frederick *start_pfn = PFN_DOWN(type->regions[mid].base); 1533f7e2f7e8SFabian Frederick *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); 1534e76b63f8SYinghai Lu 1535e76b63f8SYinghai Lu return type->regions[mid].nid; 1536e76b63f8SYinghai Lu } 1537e76b63f8SYinghai Lu #endif 1538e76b63f8SYinghai Lu 1539eab30949SStephen Boyd /** 1540eab30949SStephen Boyd * memblock_is_region_memory - check if a region is a subset of memory 1541eab30949SStephen Boyd * @base: base of region to check 1542eab30949SStephen Boyd * @size: size of region to check 1543eab30949SStephen Boyd * 1544eab30949SStephen Boyd * Check if the region [@base, @base+@size) is a subset of a memory block. 1545eab30949SStephen Boyd * 1546eab30949SStephen Boyd * RETURNS: 1547eab30949SStephen Boyd * 0 if false, non-zero if true 1548eab30949SStephen Boyd */ 15493661ca66SYinghai Lu int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 155072d4b0b4SBenjamin Herrenschmidt { 1551abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 1552eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 155372d4b0b4SBenjamin Herrenschmidt 155472d4b0b4SBenjamin Herrenschmidt if (idx == -1) 155595f72d1eSYinghai Lu return 0; 1556abb65272STomi Valkeinen return memblock.memory.regions[idx].base <= base && 1557abb65272STomi Valkeinen (memblock.memory.regions[idx].base + 1558eb18f1b5STejun Heo memblock.memory.regions[idx].size) >= end; 155995f72d1eSYinghai Lu } 156095f72d1eSYinghai Lu 1561eab30949SStephen Boyd /** 1562eab30949SStephen Boyd * memblock_is_region_reserved - check if a region intersects reserved memory 1563eab30949SStephen Boyd * @base: base of region to check 1564eab30949SStephen Boyd * @size: size of region to check 1565eab30949SStephen Boyd * 1566eab30949SStephen Boyd * Check if the region [@base, @base+@size) intersects a reserved memory block. 1567eab30949SStephen Boyd * 1568eab30949SStephen Boyd * RETURNS: 1569eab30949SStephen Boyd * 0 if false, non-zero if true 1570eab30949SStephen Boyd */ 157110d06439SYinghai Lu int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 157295f72d1eSYinghai Lu { 1573eb18f1b5STejun Heo memblock_cap_size(base, &size); 1574f1c2c19cSBenjamin Herrenschmidt return memblock_overlaps_region(&memblock.reserved, base, size) >= 0; 157595f72d1eSYinghai Lu } 157695f72d1eSYinghai Lu 15776ede1fd3SYinghai Lu void __init_memblock memblock_trim_memory(phys_addr_t align) 15786ede1fd3SYinghai Lu { 15796ede1fd3SYinghai Lu phys_addr_t start, end, orig_start, orig_end; 1580136199f0SEmil Medve struct memblock_region *r; 15816ede1fd3SYinghai Lu 1582136199f0SEmil Medve for_each_memblock(memory, r) { 1583136199f0SEmil Medve orig_start = r->base; 1584136199f0SEmil Medve orig_end = r->base + r->size; 15856ede1fd3SYinghai Lu start = round_up(orig_start, align); 15866ede1fd3SYinghai Lu end = round_down(orig_end, align); 15876ede1fd3SYinghai Lu 15886ede1fd3SYinghai Lu if (start == orig_start && end == orig_end) 15896ede1fd3SYinghai Lu continue; 15906ede1fd3SYinghai Lu 15916ede1fd3SYinghai Lu if (start < end) { 1592136199f0SEmil Medve r->base = start; 1593136199f0SEmil Medve r->size = end - start; 15946ede1fd3SYinghai Lu } else { 1595136199f0SEmil Medve memblock_remove_region(&memblock.memory, 1596136199f0SEmil Medve r - memblock.memory.regions); 1597136199f0SEmil Medve r--; 15986ede1fd3SYinghai Lu } 15996ede1fd3SYinghai Lu } 16006ede1fd3SYinghai Lu } 1601e63075a3SBenjamin Herrenschmidt 16023661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 1603e63075a3SBenjamin Herrenschmidt { 1604e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 1605e63075a3SBenjamin Herrenschmidt } 1606e63075a3SBenjamin Herrenschmidt 1607fec51014SLaura Abbott phys_addr_t __init_memblock memblock_get_current_limit(void) 1608fec51014SLaura Abbott { 1609fec51014SLaura Abbott return memblock.current_limit; 1610fec51014SLaura Abbott } 1611fec51014SLaura Abbott 16127c0caeb8STejun Heo static void __init_memblock memblock_dump(struct memblock_type *type, char *name) 16136ed311b2SBenjamin Herrenschmidt { 16146ed311b2SBenjamin Herrenschmidt unsigned long long base, size; 161566a20757STang Chen unsigned long flags; 16166ed311b2SBenjamin Herrenschmidt int i; 16176ed311b2SBenjamin Herrenschmidt 16187c0caeb8STejun Heo pr_info(" %s.cnt = 0x%lx\n", name, type->cnt); 16196ed311b2SBenjamin Herrenschmidt 16207c0caeb8STejun Heo for (i = 0; i < type->cnt; i++) { 16217c0caeb8STejun Heo struct memblock_region *rgn = &type->regions[i]; 16227c0caeb8STejun Heo char nid_buf[32] = ""; 16236ed311b2SBenjamin Herrenschmidt 16247c0caeb8STejun Heo base = rgn->base; 16257c0caeb8STejun Heo size = rgn->size; 162666a20757STang Chen flags = rgn->flags; 16277c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 16287c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 16297c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 16307c0caeb8STejun Heo memblock_get_region_node(rgn)); 16317c0caeb8STejun Heo #endif 163266a20757STang Chen pr_info(" %s[%#x]\t[%#016llx-%#016llx], %#llx bytes%s flags: %#lx\n", 163366a20757STang Chen name, i, base, base + size - 1, size, nid_buf, flags); 16346ed311b2SBenjamin Herrenschmidt } 16356ed311b2SBenjamin Herrenschmidt } 16366ed311b2SBenjamin Herrenschmidt 16374ff7b82fSTejun Heo void __init_memblock __memblock_dump_all(void) 16386ed311b2SBenjamin Herrenschmidt { 16396ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 16401440c4e2STejun Heo pr_info(" memory size = %#llx reserved size = %#llx\n", 16411440c4e2STejun Heo (unsigned long long)memblock.memory.total_size, 16421440c4e2STejun Heo (unsigned long long)memblock.reserved.total_size); 16436ed311b2SBenjamin Herrenschmidt 16446ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.memory, "memory"); 16456ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.reserved, "reserved"); 16466ed311b2SBenjamin Herrenschmidt } 16476ed311b2SBenjamin Herrenschmidt 16481aadc056STejun Heo void __init memblock_allow_resize(void) 16496ed311b2SBenjamin Herrenschmidt { 1650142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 16516ed311b2SBenjamin Herrenschmidt } 16526ed311b2SBenjamin Herrenschmidt 16536ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 16546ed311b2SBenjamin Herrenschmidt { 16556ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 16566ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 16576ed311b2SBenjamin Herrenschmidt return 0; 16586ed311b2SBenjamin Herrenschmidt } 16596ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 16606ed311b2SBenjamin Herrenschmidt 1661c378ddd5STejun Heo #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) 16626d03b885SBenjamin Herrenschmidt 16636d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 16646d03b885SBenjamin Herrenschmidt { 16656d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 16666d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 16676d03b885SBenjamin Herrenschmidt int i; 16686d03b885SBenjamin Herrenschmidt 16696d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 16706d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 16716d03b885SBenjamin Herrenschmidt seq_printf(m, "%4d: ", i); 16726d03b885SBenjamin Herrenschmidt if (sizeof(phys_addr_t) == 4) 16736d03b885SBenjamin Herrenschmidt seq_printf(m, "0x%08lx..0x%08lx\n", 16746d03b885SBenjamin Herrenschmidt (unsigned long)reg->base, 16756d03b885SBenjamin Herrenschmidt (unsigned long)(reg->base + reg->size - 1)); 16766d03b885SBenjamin Herrenschmidt else 16776d03b885SBenjamin Herrenschmidt seq_printf(m, "0x%016llx..0x%016llx\n", 16786d03b885SBenjamin Herrenschmidt (unsigned long long)reg->base, 16796d03b885SBenjamin Herrenschmidt (unsigned long long)(reg->base + reg->size - 1)); 16806d03b885SBenjamin Herrenschmidt 16816d03b885SBenjamin Herrenschmidt } 16826d03b885SBenjamin Herrenschmidt return 0; 16836d03b885SBenjamin Herrenschmidt } 16846d03b885SBenjamin Herrenschmidt 16856d03b885SBenjamin Herrenschmidt static int memblock_debug_open(struct inode *inode, struct file *file) 16866d03b885SBenjamin Herrenschmidt { 16876d03b885SBenjamin Herrenschmidt return single_open(file, memblock_debug_show, inode->i_private); 16886d03b885SBenjamin Herrenschmidt } 16896d03b885SBenjamin Herrenschmidt 16906d03b885SBenjamin Herrenschmidt static const struct file_operations memblock_debug_fops = { 16916d03b885SBenjamin Herrenschmidt .open = memblock_debug_open, 16926d03b885SBenjamin Herrenschmidt .read = seq_read, 16936d03b885SBenjamin Herrenschmidt .llseek = seq_lseek, 16946d03b885SBenjamin Herrenschmidt .release = single_release, 16956d03b885SBenjamin Herrenschmidt }; 16966d03b885SBenjamin Herrenschmidt 16976d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 16986d03b885SBenjamin Herrenschmidt { 16996d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 17006d03b885SBenjamin Herrenschmidt if (!root) 17016d03b885SBenjamin Herrenschmidt return -ENXIO; 17026d03b885SBenjamin Herrenschmidt debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); 17036d03b885SBenjamin Herrenschmidt debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); 170470210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 170570210ed9SPhilipp Hachtmann debugfs_create_file("physmem", S_IRUGO, root, &memblock.physmem, &memblock_debug_fops); 170670210ed9SPhilipp Hachtmann #endif 17076d03b885SBenjamin Herrenschmidt 17086d03b885SBenjamin Herrenschmidt return 0; 17096d03b885SBenjamin Herrenschmidt } 17106d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 17116d03b885SBenjamin Herrenschmidt 17126d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 1713