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) { 569784656f9STejun Heo nr_new++; 570784656f9STejun Heo if (insert) 571784656f9STejun Heo memblock_insert_region(type, i++, base, 57266a20757STang Chen rbase - base, nid, 57366a20757STang Chen flags); 574784656f9STejun Heo } 575784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 576784656f9STejun Heo base = min(rend, end); 5778f7a6605SBenjamin Herrenschmidt } 5788f7a6605SBenjamin Herrenschmidt 579784656f9STejun Heo /* insert the remaining portion */ 580784656f9STejun Heo if (base < end) { 581784656f9STejun Heo nr_new++; 582784656f9STejun Heo if (insert) 58366a20757STang Chen memblock_insert_region(type, i, base, end - base, 58466a20757STang Chen nid, flags); 5858f7a6605SBenjamin Herrenschmidt } 5868f7a6605SBenjamin Herrenschmidt 587784656f9STejun Heo /* 588784656f9STejun Heo * If this was the first round, resize array and repeat for actual 589784656f9STejun Heo * insertions; otherwise, merge and return. 5908f7a6605SBenjamin Herrenschmidt */ 591784656f9STejun Heo if (!insert) { 592784656f9STejun Heo while (type->cnt + nr_new > type->max) 59348c3b583SGreg Pearson if (memblock_double_array(type, obase, size) < 0) 594784656f9STejun Heo return -ENOMEM; 595784656f9STejun Heo insert = true; 596784656f9STejun Heo goto repeat; 59795f72d1eSYinghai Lu } else { 598784656f9STejun Heo memblock_merge_regions(type); 59995f72d1eSYinghai Lu return 0; 60095f72d1eSYinghai Lu } 601784656f9STejun Heo } 60295f72d1eSYinghai Lu 6037fb0bc3fSTejun Heo int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, 6047fb0bc3fSTejun Heo int nid) 6057fb0bc3fSTejun Heo { 606f1af9d3aSPhilipp Hachtmann return memblock_add_range(&memblock.memory, base, size, nid, 0); 6077fb0bc3fSTejun Heo } 6087fb0bc3fSTejun Heo 6096a4055bcSAlexander Kuleshov static int __init_memblock memblock_add_region(phys_addr_t base, 6106a4055bcSAlexander Kuleshov phys_addr_t size, 6116a4055bcSAlexander Kuleshov int nid, 6126a4055bcSAlexander Kuleshov unsigned long flags) 6136a4055bcSAlexander Kuleshov { 6146a4055bcSAlexander Kuleshov struct memblock_type *_rgn = &memblock.memory; 6156a4055bcSAlexander Kuleshov 6166a4055bcSAlexander Kuleshov memblock_dbg("memblock_add: [%#016llx-%#016llx] flags %#02lx %pF\n", 6176a4055bcSAlexander Kuleshov (unsigned long long)base, 6186a4055bcSAlexander Kuleshov (unsigned long long)base + size - 1, 6196a4055bcSAlexander Kuleshov flags, (void *)_RET_IP_); 6206a4055bcSAlexander Kuleshov 6216a4055bcSAlexander Kuleshov return memblock_add_range(_rgn, base, size, nid, flags); 6226a4055bcSAlexander Kuleshov } 6236a4055bcSAlexander Kuleshov 624581adcbeSTejun Heo int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 62595f72d1eSYinghai Lu { 6266a4055bcSAlexander Kuleshov return memblock_add_region(base, size, MAX_NUMNODES, 0); 62795f72d1eSYinghai Lu } 62895f72d1eSYinghai Lu 6296a9ceb31STejun Heo /** 6306a9ceb31STejun Heo * memblock_isolate_range - isolate given range into disjoint memblocks 6316a9ceb31STejun Heo * @type: memblock type to isolate range for 6326a9ceb31STejun Heo * @base: base of range to isolate 6336a9ceb31STejun Heo * @size: size of range to isolate 6346a9ceb31STejun Heo * @start_rgn: out parameter for the start of isolated region 6356a9ceb31STejun Heo * @end_rgn: out parameter for the end of isolated region 6366a9ceb31STejun Heo * 6376a9ceb31STejun Heo * Walk @type and ensure that regions don't cross the boundaries defined by 6386a9ceb31STejun Heo * [@base,@base+@size). Crossing regions are split at the boundaries, 6396a9ceb31STejun Heo * which may create at most two more regions. The index of the first 6406a9ceb31STejun Heo * region inside the range is returned in *@start_rgn and end in *@end_rgn. 6416a9ceb31STejun Heo * 6426a9ceb31STejun Heo * RETURNS: 6436a9ceb31STejun Heo * 0 on success, -errno on failure. 6446a9ceb31STejun Heo */ 6456a9ceb31STejun Heo static int __init_memblock memblock_isolate_range(struct memblock_type *type, 6466a9ceb31STejun Heo phys_addr_t base, phys_addr_t size, 6476a9ceb31STejun Heo int *start_rgn, int *end_rgn) 6486a9ceb31STejun Heo { 649eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 6506a9ceb31STejun Heo int i; 6516a9ceb31STejun Heo 6526a9ceb31STejun Heo *start_rgn = *end_rgn = 0; 6536a9ceb31STejun Heo 654b3dc627cSTejun Heo if (!size) 655b3dc627cSTejun Heo return 0; 656b3dc627cSTejun Heo 6576a9ceb31STejun Heo /* we'll create at most two more regions */ 6586a9ceb31STejun Heo while (type->cnt + 2 > type->max) 65948c3b583SGreg Pearson if (memblock_double_array(type, base, size) < 0) 6606a9ceb31STejun Heo return -ENOMEM; 6616a9ceb31STejun Heo 6626a9ceb31STejun Heo for (i = 0; i < type->cnt; i++) { 6636a9ceb31STejun Heo struct memblock_region *rgn = &type->regions[i]; 6646a9ceb31STejun Heo phys_addr_t rbase = rgn->base; 6656a9ceb31STejun Heo phys_addr_t rend = rbase + rgn->size; 6666a9ceb31STejun Heo 6676a9ceb31STejun Heo if (rbase >= end) 6686a9ceb31STejun Heo break; 6696a9ceb31STejun Heo if (rend <= base) 6706a9ceb31STejun Heo continue; 6716a9ceb31STejun Heo 6726a9ceb31STejun Heo if (rbase < base) { 6736a9ceb31STejun Heo /* 6746a9ceb31STejun Heo * @rgn intersects from below. Split and continue 6756a9ceb31STejun Heo * to process the next region - the new top half. 6766a9ceb31STejun Heo */ 6776a9ceb31STejun Heo rgn->base = base; 6781440c4e2STejun Heo rgn->size -= base - rbase; 6791440c4e2STejun Heo type->total_size -= base - rbase; 6806a9ceb31STejun Heo memblock_insert_region(type, i, rbase, base - rbase, 68166a20757STang Chen memblock_get_region_node(rgn), 68266a20757STang Chen rgn->flags); 6836a9ceb31STejun Heo } else if (rend > end) { 6846a9ceb31STejun Heo /* 6856a9ceb31STejun Heo * @rgn intersects from above. Split and redo the 6866a9ceb31STejun Heo * current region - the new bottom half. 6876a9ceb31STejun Heo */ 6886a9ceb31STejun Heo rgn->base = end; 6891440c4e2STejun Heo rgn->size -= end - rbase; 6901440c4e2STejun Heo type->total_size -= end - rbase; 6916a9ceb31STejun Heo memblock_insert_region(type, i--, rbase, end - rbase, 69266a20757STang Chen memblock_get_region_node(rgn), 69366a20757STang Chen rgn->flags); 6946a9ceb31STejun Heo } else { 6956a9ceb31STejun Heo /* @rgn is fully contained, record it */ 6966a9ceb31STejun Heo if (!*end_rgn) 6976a9ceb31STejun Heo *start_rgn = i; 6986a9ceb31STejun Heo *end_rgn = i + 1; 6996a9ceb31STejun Heo } 7006a9ceb31STejun Heo } 7016a9ceb31STejun Heo 7026a9ceb31STejun Heo return 0; 7036a9ceb31STejun Heo } 7046a9ceb31STejun Heo 705f1af9d3aSPhilipp Hachtmann int __init_memblock memblock_remove_range(struct memblock_type *type, 7068f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 70795f72d1eSYinghai Lu { 70871936180STejun Heo int start_rgn, end_rgn; 70971936180STejun Heo int i, ret; 71095f72d1eSYinghai Lu 71171936180STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 71271936180STejun Heo if (ret) 71371936180STejun Heo return ret; 71495f72d1eSYinghai Lu 71571936180STejun Heo for (i = end_rgn - 1; i >= start_rgn; i--) 71671936180STejun Heo memblock_remove_region(type, i); 71795f72d1eSYinghai Lu return 0; 71895f72d1eSYinghai Lu } 71995f72d1eSYinghai Lu 720581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 72195f72d1eSYinghai Lu { 722f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.memory, base, size); 72395f72d1eSYinghai Lu } 72495f72d1eSYinghai Lu 725f1af9d3aSPhilipp Hachtmann 726581adcbeSTejun Heo int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) 72795f72d1eSYinghai Lu { 72824aa0788STejun Heo memblock_dbg(" memblock_free: [%#016llx-%#016llx] %pF\n", 729a150439cSH. Peter Anvin (unsigned long long)base, 730931d13f5SGrygorii Strashko (unsigned long long)base + size - 1, 731a150439cSH. Peter Anvin (void *)_RET_IP_); 73224aa0788STejun Heo 733aedf95eaSCatalin Marinas kmemleak_free_part(__va(base), size); 734f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.reserved, base, size); 73595f72d1eSYinghai Lu } 73695f72d1eSYinghai Lu 73766a20757STang Chen static int __init_memblock memblock_reserve_region(phys_addr_t base, 73866a20757STang Chen phys_addr_t size, 73966a20757STang Chen int nid, 74066a20757STang Chen unsigned long flags) 74195f72d1eSYinghai Lu { 7427fc825b4SBaoquan He struct memblock_type *type = &memblock.reserved; 74395f72d1eSYinghai Lu 74466a20757STang Chen memblock_dbg("memblock_reserve: [%#016llx-%#016llx] flags %#02lx %pF\n", 745a150439cSH. Peter Anvin (unsigned long long)base, 746931d13f5SGrygorii Strashko (unsigned long long)base + size - 1, 74766a20757STang Chen flags, (void *)_RET_IP_); 74895f72d1eSYinghai Lu 7497fc825b4SBaoquan He return memblock_add_range(type, base, size, nid, flags); 75066a20757STang Chen } 75166a20757STang Chen 75266a20757STang Chen int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 75366a20757STang Chen { 75466a20757STang Chen return memblock_reserve_region(base, size, MAX_NUMNODES, 0); 75595f72d1eSYinghai Lu } 75695f72d1eSYinghai Lu 75735fd0808STejun Heo /** 75866b16edfSTang Chen * 7594308ce17STony Luck * This function isolates region [@base, @base + @size), and sets/clears flag 76066b16edfSTang Chen * 76166b16edfSTang Chen * Return 0 on succees, -errno on failure. 76266b16edfSTang Chen */ 7634308ce17STony Luck static int __init_memblock memblock_setclr_flag(phys_addr_t base, 7644308ce17STony Luck phys_addr_t size, int set, int flag) 76566b16edfSTang Chen { 76666b16edfSTang Chen struct memblock_type *type = &memblock.memory; 76766b16edfSTang Chen int i, ret, start_rgn, end_rgn; 76866b16edfSTang Chen 76966b16edfSTang Chen ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 77066b16edfSTang Chen if (ret) 77166b16edfSTang Chen return ret; 77266b16edfSTang Chen 77366b16edfSTang Chen for (i = start_rgn; i < end_rgn; i++) 7744308ce17STony Luck if (set) 7754308ce17STony Luck memblock_set_region_flags(&type->regions[i], flag); 7764308ce17STony Luck else 7774308ce17STony Luck memblock_clear_region_flags(&type->regions[i], flag); 77866b16edfSTang Chen 77966b16edfSTang Chen memblock_merge_regions(type); 78066b16edfSTang Chen return 0; 78166b16edfSTang Chen } 78266b16edfSTang Chen 78366b16edfSTang Chen /** 7844308ce17STony Luck * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. 7854308ce17STony Luck * @base: the base phys addr of the region 7864308ce17STony Luck * @size: the size of the region 7874308ce17STony Luck * 7884308ce17STony Luck * Return 0 on succees, -errno on failure. 7894308ce17STony Luck */ 7904308ce17STony Luck int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) 7914308ce17STony Luck { 7924308ce17STony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); 7934308ce17STony Luck } 7944308ce17STony Luck 7954308ce17STony Luck /** 79666b16edfSTang Chen * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. 79766b16edfSTang Chen * @base: the base phys addr of the region 79866b16edfSTang Chen * @size: the size of the region 79966b16edfSTang Chen * 80066b16edfSTang Chen * Return 0 on succees, -errno on failure. 80166b16edfSTang Chen */ 80266b16edfSTang Chen int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) 80366b16edfSTang Chen { 8044308ce17STony Luck return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); 80566b16edfSTang Chen } 80666b16edfSTang Chen 80766b16edfSTang Chen /** 808a3f5bafcSTony Luck * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. 809a3f5bafcSTony Luck * @base: the base phys addr of the region 810a3f5bafcSTony Luck * @size: the size of the region 811a3f5bafcSTony Luck * 812a3f5bafcSTony Luck * Return 0 on succees, -errno on failure. 813a3f5bafcSTony Luck */ 814a3f5bafcSTony Luck int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) 815a3f5bafcSTony Luck { 816a3f5bafcSTony Luck system_has_some_mirror = true; 817a3f5bafcSTony Luck 818a3f5bafcSTony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); 819a3f5bafcSTony Luck } 820a3f5bafcSTony Luck 821a3f5bafcSTony Luck 822a3f5bafcSTony Luck /** 823*8e7a7f86SRobin Holt * __next_reserved_mem_region - next function for for_each_reserved_region() 824*8e7a7f86SRobin Holt * @idx: pointer to u64 loop variable 825*8e7a7f86SRobin Holt * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL 826*8e7a7f86SRobin Holt * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL 827*8e7a7f86SRobin Holt * 828*8e7a7f86SRobin Holt * Iterate over all reserved memory regions. 829*8e7a7f86SRobin Holt */ 830*8e7a7f86SRobin Holt void __init_memblock __next_reserved_mem_region(u64 *idx, 831*8e7a7f86SRobin Holt phys_addr_t *out_start, 832*8e7a7f86SRobin Holt phys_addr_t *out_end) 833*8e7a7f86SRobin Holt { 834*8e7a7f86SRobin Holt struct memblock_type *rsv = &memblock.reserved; 835*8e7a7f86SRobin Holt 836*8e7a7f86SRobin Holt if (*idx >= 0 && *idx < rsv->cnt) { 837*8e7a7f86SRobin Holt struct memblock_region *r = &rsv->regions[*idx]; 838*8e7a7f86SRobin Holt phys_addr_t base = r->base; 839*8e7a7f86SRobin Holt phys_addr_t size = r->size; 840*8e7a7f86SRobin Holt 841*8e7a7f86SRobin Holt if (out_start) 842*8e7a7f86SRobin Holt *out_start = base; 843*8e7a7f86SRobin Holt if (out_end) 844*8e7a7f86SRobin Holt *out_end = base + size - 1; 845*8e7a7f86SRobin Holt 846*8e7a7f86SRobin Holt *idx += 1; 847*8e7a7f86SRobin Holt return; 848*8e7a7f86SRobin Holt } 849*8e7a7f86SRobin Holt 850*8e7a7f86SRobin Holt /* signal end of iteration */ 851*8e7a7f86SRobin Holt *idx = ULLONG_MAX; 852*8e7a7f86SRobin Holt } 853*8e7a7f86SRobin Holt 854*8e7a7f86SRobin Holt /** 855f1af9d3aSPhilipp Hachtmann * __next__mem_range - next function for for_each_free_mem_range() etc. 85635fd0808STejun Heo * @idx: pointer to u64 loop variable 857b1154233SGrygorii Strashko * @nid: node selector, %NUMA_NO_NODE for all nodes 858fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 859f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 860f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 861dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 862dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 863dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 86435fd0808STejun Heo * 865f1af9d3aSPhilipp Hachtmann * Find the first area from *@idx which matches @nid, fill the out 86635fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 867f1af9d3aSPhilipp Hachtmann * *@idx contains index into type_a and the upper 32bit indexes the 868f1af9d3aSPhilipp Hachtmann * areas before each region in type_b. For example, if type_b regions 86935fd0808STejun Heo * look like the following, 87035fd0808STejun Heo * 87135fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 87235fd0808STejun Heo * 87335fd0808STejun Heo * The upper 32bit indexes the following regions. 87435fd0808STejun Heo * 87535fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 87635fd0808STejun Heo * 87735fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 87835fd0808STejun Heo * in lockstep and returns each intersection. 87935fd0808STejun Heo */ 880fc6daaf9STony Luck void __init_memblock __next_mem_range(u64 *idx, int nid, ulong flags, 881f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 882f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 88335fd0808STejun Heo phys_addr_t *out_start, 88435fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 88535fd0808STejun Heo { 886f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 887f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 888b1154233SGrygorii Strashko 889f1af9d3aSPhilipp Hachtmann if (WARN_ONCE(nid == MAX_NUMNODES, 890f1af9d3aSPhilipp Hachtmann "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 891560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 89235fd0808STejun Heo 893f1af9d3aSPhilipp Hachtmann for (; idx_a < type_a->cnt; idx_a++) { 894f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 895f1af9d3aSPhilipp Hachtmann 89635fd0808STejun Heo phys_addr_t m_start = m->base; 89735fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 898f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 89935fd0808STejun Heo 90035fd0808STejun Heo /* only memory regions are associated with nodes, check it */ 901f1af9d3aSPhilipp Hachtmann if (nid != NUMA_NO_NODE && nid != m_nid) 90235fd0808STejun Heo continue; 90335fd0808STejun Heo 9040a313a99SXishi Qiu /* skip hotpluggable memory regions if needed */ 9050a313a99SXishi Qiu if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 9060a313a99SXishi Qiu continue; 9070a313a99SXishi Qiu 908a3f5bafcSTony Luck /* if we want mirror memory skip non-mirror memory regions */ 909a3f5bafcSTony Luck if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 910a3f5bafcSTony Luck continue; 911a3f5bafcSTony Luck 912f1af9d3aSPhilipp Hachtmann if (!type_b) { 913f1af9d3aSPhilipp Hachtmann if (out_start) 914f1af9d3aSPhilipp Hachtmann *out_start = m_start; 915f1af9d3aSPhilipp Hachtmann if (out_end) 916f1af9d3aSPhilipp Hachtmann *out_end = m_end; 917f1af9d3aSPhilipp Hachtmann if (out_nid) 918f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 919f1af9d3aSPhilipp Hachtmann idx_a++; 920f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 921f1af9d3aSPhilipp Hachtmann return; 922f1af9d3aSPhilipp Hachtmann } 92335fd0808STejun Heo 924f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 925f1af9d3aSPhilipp Hachtmann for (; idx_b < type_b->cnt + 1; idx_b++) { 926f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 927f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 928f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 929f1af9d3aSPhilipp Hachtmann 930f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 931f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 932f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 933f1af9d3aSPhilipp Hachtmann r->base : ULLONG_MAX; 934f1af9d3aSPhilipp Hachtmann 935f1af9d3aSPhilipp Hachtmann /* 936f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 937f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 938f1af9d3aSPhilipp Hachtmann */ 93935fd0808STejun Heo if (r_start >= m_end) 94035fd0808STejun Heo break; 94135fd0808STejun Heo /* if the two regions intersect, we're done */ 94235fd0808STejun Heo if (m_start < r_end) { 94335fd0808STejun Heo if (out_start) 944f1af9d3aSPhilipp Hachtmann *out_start = 945f1af9d3aSPhilipp Hachtmann max(m_start, r_start); 94635fd0808STejun Heo if (out_end) 94735fd0808STejun Heo *out_end = min(m_end, r_end); 94835fd0808STejun Heo if (out_nid) 949f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 95035fd0808STejun Heo /* 951f1af9d3aSPhilipp Hachtmann * The region which ends first is 952f1af9d3aSPhilipp Hachtmann * advanced for the next iteration. 95335fd0808STejun Heo */ 95435fd0808STejun Heo if (m_end <= r_end) 955f1af9d3aSPhilipp Hachtmann idx_a++; 95635fd0808STejun Heo else 957f1af9d3aSPhilipp Hachtmann idx_b++; 958f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 95935fd0808STejun Heo return; 96035fd0808STejun Heo } 96135fd0808STejun Heo } 96235fd0808STejun Heo } 96335fd0808STejun Heo 96435fd0808STejun Heo /* signal end of iteration */ 96535fd0808STejun Heo *idx = ULLONG_MAX; 96635fd0808STejun Heo } 96735fd0808STejun Heo 9687bd0b0f0STejun Heo /** 969f1af9d3aSPhilipp Hachtmann * __next_mem_range_rev - generic next function for for_each_*_range_rev() 970f1af9d3aSPhilipp Hachtmann * 971f1af9d3aSPhilipp Hachtmann * Finds the next range from type_a which is not marked as unsuitable 972f1af9d3aSPhilipp Hachtmann * in type_b. 973f1af9d3aSPhilipp Hachtmann * 9747bd0b0f0STejun Heo * @idx: pointer to u64 loop variable 975b1154233SGrygorii Strashko * @nid: nid: node selector, %NUMA_NO_NODE for all nodes 976fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 977f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 978f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 979dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 980dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 981dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 9827bd0b0f0STejun Heo * 983f1af9d3aSPhilipp Hachtmann * Reverse of __next_mem_range(). 9847bd0b0f0STejun Heo */ 985fc6daaf9STony Luck void __init_memblock __next_mem_range_rev(u64 *idx, int nid, ulong flags, 986f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 987f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 9887bd0b0f0STejun Heo phys_addr_t *out_start, 9897bd0b0f0STejun Heo phys_addr_t *out_end, int *out_nid) 9907bd0b0f0STejun Heo { 991f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 992f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 993b1154233SGrygorii Strashko 994560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 995560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 9967bd0b0f0STejun Heo 9977bd0b0f0STejun Heo if (*idx == (u64)ULLONG_MAX) { 998f1af9d3aSPhilipp Hachtmann idx_a = type_a->cnt - 1; 999f1af9d3aSPhilipp Hachtmann idx_b = type_b->cnt; 10007bd0b0f0STejun Heo } 10017bd0b0f0STejun Heo 1002f1af9d3aSPhilipp Hachtmann for (; idx_a >= 0; idx_a--) { 1003f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1004f1af9d3aSPhilipp Hachtmann 10057bd0b0f0STejun Heo phys_addr_t m_start = m->base; 10067bd0b0f0STejun Heo phys_addr_t m_end = m->base + m->size; 1007f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 10087bd0b0f0STejun Heo 10097bd0b0f0STejun Heo /* only memory regions are associated with nodes, check it */ 1010f1af9d3aSPhilipp Hachtmann if (nid != NUMA_NO_NODE && nid != m_nid) 10117bd0b0f0STejun Heo continue; 10127bd0b0f0STejun Heo 101355ac590cSTang Chen /* skip hotpluggable memory regions if needed */ 101455ac590cSTang Chen if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 101555ac590cSTang Chen continue; 101655ac590cSTang Chen 1017a3f5bafcSTony Luck /* if we want mirror memory skip non-mirror memory regions */ 1018a3f5bafcSTony Luck if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 1019a3f5bafcSTony Luck continue; 1020a3f5bafcSTony Luck 1021f1af9d3aSPhilipp Hachtmann if (!type_b) { 1022f1af9d3aSPhilipp Hachtmann if (out_start) 1023f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1024f1af9d3aSPhilipp Hachtmann if (out_end) 1025f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1026f1af9d3aSPhilipp Hachtmann if (out_nid) 1027f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1028f1af9d3aSPhilipp Hachtmann idx_a++; 1029f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1030f1af9d3aSPhilipp Hachtmann return; 1031f1af9d3aSPhilipp Hachtmann } 10327bd0b0f0STejun Heo 1033f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1034f1af9d3aSPhilipp Hachtmann for (; idx_b >= 0; idx_b--) { 1035f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1036f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1037f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1038f1af9d3aSPhilipp Hachtmann 1039f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1040f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1041f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 1042f1af9d3aSPhilipp Hachtmann r->base : ULLONG_MAX; 1043f1af9d3aSPhilipp Hachtmann /* 1044f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1045f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1046f1af9d3aSPhilipp Hachtmann */ 1047f1af9d3aSPhilipp Hachtmann 10487bd0b0f0STejun Heo if (r_end <= m_start) 10497bd0b0f0STejun Heo break; 10507bd0b0f0STejun Heo /* if the two regions intersect, we're done */ 10517bd0b0f0STejun Heo if (m_end > r_start) { 10527bd0b0f0STejun Heo if (out_start) 10537bd0b0f0STejun Heo *out_start = max(m_start, r_start); 10547bd0b0f0STejun Heo if (out_end) 10557bd0b0f0STejun Heo *out_end = min(m_end, r_end); 10567bd0b0f0STejun Heo if (out_nid) 1057f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 10587bd0b0f0STejun Heo if (m_start >= r_start) 1059f1af9d3aSPhilipp Hachtmann idx_a--; 10607bd0b0f0STejun Heo else 1061f1af9d3aSPhilipp Hachtmann idx_b--; 1062f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 10637bd0b0f0STejun Heo return; 10647bd0b0f0STejun Heo } 10657bd0b0f0STejun Heo } 10667bd0b0f0STejun Heo } 1067f1af9d3aSPhilipp Hachtmann /* signal end of iteration */ 10687bd0b0f0STejun Heo *idx = ULLONG_MAX; 10697bd0b0f0STejun Heo } 10707bd0b0f0STejun Heo 10717c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 10727c0caeb8STejun Heo /* 10737c0caeb8STejun Heo * Common iterator interface used to define for_each_mem_range(). 10747c0caeb8STejun Heo */ 10757c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 10767c0caeb8STejun Heo unsigned long *out_start_pfn, 10777c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 10787c0caeb8STejun Heo { 10797c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 10807c0caeb8STejun Heo struct memblock_region *r; 10817c0caeb8STejun Heo 10827c0caeb8STejun Heo while (++*idx < type->cnt) { 10837c0caeb8STejun Heo r = &type->regions[*idx]; 10847c0caeb8STejun Heo 10857c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 10867c0caeb8STejun Heo continue; 10877c0caeb8STejun Heo if (nid == MAX_NUMNODES || nid == r->nid) 10887c0caeb8STejun Heo break; 10897c0caeb8STejun Heo } 10907c0caeb8STejun Heo if (*idx >= type->cnt) { 10917c0caeb8STejun Heo *idx = -1; 10927c0caeb8STejun Heo return; 10937c0caeb8STejun Heo } 10947c0caeb8STejun Heo 10957c0caeb8STejun Heo if (out_start_pfn) 10967c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 10977c0caeb8STejun Heo if (out_end_pfn) 10987c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 10997c0caeb8STejun Heo if (out_nid) 11007c0caeb8STejun Heo *out_nid = r->nid; 11017c0caeb8STejun Heo } 11027c0caeb8STejun Heo 11037c0caeb8STejun Heo /** 11047c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 11057c0caeb8STejun Heo * @base: base of area to set node ID for 11067c0caeb8STejun Heo * @size: size of area to set node ID for 1107e7e8de59STang Chen * @type: memblock type to set node ID for 11087c0caeb8STejun Heo * @nid: node ID to set 11097c0caeb8STejun Heo * 1110e7e8de59STang Chen * Set the nid of memblock @type regions in [@base,@base+@size) to @nid. 11117c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 11127c0caeb8STejun Heo * 11137c0caeb8STejun Heo * RETURNS: 11147c0caeb8STejun Heo * 0 on success, -errno on failure. 11157c0caeb8STejun Heo */ 11167c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 1117e7e8de59STang Chen struct memblock_type *type, int nid) 11187c0caeb8STejun Heo { 11196a9ceb31STejun Heo int start_rgn, end_rgn; 11206a9ceb31STejun Heo int i, ret; 11217c0caeb8STejun Heo 11226a9ceb31STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 11236a9ceb31STejun Heo if (ret) 11246a9ceb31STejun Heo return ret; 11257c0caeb8STejun Heo 11266a9ceb31STejun Heo for (i = start_rgn; i < end_rgn; i++) 1127e9d24ad3SWanpeng Li memblock_set_region_node(&type->regions[i], nid); 11287c0caeb8STejun Heo 11297c0caeb8STejun Heo memblock_merge_regions(type); 11307c0caeb8STejun Heo return 0; 11317c0caeb8STejun Heo } 11327c0caeb8STejun Heo #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ 11337c0caeb8STejun Heo 11342bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, 11352bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t start, 1136fc6daaf9STony Luck phys_addr_t end, int nid, ulong flags) 113795f72d1eSYinghai Lu { 11386ed311b2SBenjamin Herrenschmidt phys_addr_t found; 113995f72d1eSYinghai Lu 114079f40fabSGrygorii Strashko if (!align) 114179f40fabSGrygorii Strashko align = SMP_CACHE_BYTES; 114294f3d3afSVineet Gupta 1143fc6daaf9STony Luck found = memblock_find_in_range_node(size, align, start, end, nid, 1144fc6daaf9STony Luck flags); 1145aedf95eaSCatalin Marinas if (found && !memblock_reserve(found, size)) { 1146aedf95eaSCatalin Marinas /* 1147aedf95eaSCatalin Marinas * The min_count is set to 0 so that memblock allocations are 1148aedf95eaSCatalin Marinas * never reported as leaks. 1149aedf95eaSCatalin Marinas */ 1150aedf95eaSCatalin Marinas kmemleak_alloc(__va(found), size, 0, 0); 11516ed311b2SBenjamin Herrenschmidt return found; 1152aedf95eaSCatalin Marinas } 11536ed311b2SBenjamin Herrenschmidt return 0; 115495f72d1eSYinghai Lu } 115595f72d1eSYinghai Lu 11562bfc2862SAkinobu Mita phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, 1157fc6daaf9STony Luck phys_addr_t start, phys_addr_t end, 1158fc6daaf9STony Luck ulong flags) 11592bfc2862SAkinobu Mita { 1160fc6daaf9STony Luck return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, 1161fc6daaf9STony Luck flags); 11622bfc2862SAkinobu Mita } 11632bfc2862SAkinobu Mita 11642bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size, 11652bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t max_addr, 1166fc6daaf9STony Luck int nid, ulong flags) 11672bfc2862SAkinobu Mita { 1168fc6daaf9STony Luck return memblock_alloc_range_nid(size, align, 0, max_addr, nid, flags); 11692bfc2862SAkinobu Mita } 11702bfc2862SAkinobu Mita 11717bd0b0f0STejun Heo phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) 11727bd0b0f0STejun Heo { 1173a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 1174a3f5bafcSTony Luck phys_addr_t ret; 1175a3f5bafcSTony Luck 1176a3f5bafcSTony Luck again: 1177a3f5bafcSTony Luck ret = memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, 1178a3f5bafcSTony Luck nid, flags); 1179a3f5bafcSTony Luck 1180a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 1181a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 1182a3f5bafcSTony Luck goto again; 1183a3f5bafcSTony Luck } 1184a3f5bafcSTony Luck return ret; 11857bd0b0f0STejun Heo } 11867bd0b0f0STejun Heo 11877bd0b0f0STejun Heo phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 11887bd0b0f0STejun Heo { 1189fc6daaf9STony Luck return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE, 1190fc6daaf9STony Luck MEMBLOCK_NONE); 11917bd0b0f0STejun Heo } 11927bd0b0f0STejun Heo 11936ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 119495f72d1eSYinghai Lu { 11956ed311b2SBenjamin Herrenschmidt phys_addr_t alloc; 11966ed311b2SBenjamin Herrenschmidt 11976ed311b2SBenjamin Herrenschmidt alloc = __memblock_alloc_base(size, align, max_addr); 11986ed311b2SBenjamin Herrenschmidt 11996ed311b2SBenjamin Herrenschmidt if (alloc == 0) 12006ed311b2SBenjamin Herrenschmidt panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n", 12016ed311b2SBenjamin Herrenschmidt (unsigned long long) size, (unsigned long long) max_addr); 12026ed311b2SBenjamin Herrenschmidt 12036ed311b2SBenjamin Herrenschmidt return alloc; 120495f72d1eSYinghai Lu } 120595f72d1eSYinghai Lu 12066ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) 120795f72d1eSYinghai Lu { 12086ed311b2SBenjamin Herrenschmidt return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 120995f72d1eSYinghai Lu } 121095f72d1eSYinghai Lu 12119d1e2492SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 12129d1e2492SBenjamin Herrenschmidt { 12139d1e2492SBenjamin Herrenschmidt phys_addr_t res = memblock_alloc_nid(size, align, nid); 12149d1e2492SBenjamin Herrenschmidt 12159d1e2492SBenjamin Herrenschmidt if (res) 12169d1e2492SBenjamin Herrenschmidt return res; 121715fb0972STejun Heo return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 121895f72d1eSYinghai Lu } 121995f72d1eSYinghai Lu 122026f09e9bSSantosh Shilimkar /** 122126f09e9bSSantosh Shilimkar * memblock_virt_alloc_internal - allocate boot memory block 122226f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 122326f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 122426f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region to allocate (phys address) 122526f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region to allocate (phys address) 122626f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 122726f09e9bSSantosh Shilimkar * 122826f09e9bSSantosh Shilimkar * The @min_addr limit is dropped if it can not be satisfied and the allocation 122926f09e9bSSantosh Shilimkar * will fall back to memory below @min_addr. Also, allocation may fall back 123026f09e9bSSantosh Shilimkar * to any node in the system if the specified node can not 123126f09e9bSSantosh Shilimkar * hold the requested memory. 123226f09e9bSSantosh Shilimkar * 123326f09e9bSSantosh Shilimkar * The allocation is performed from memory region limited by 123426f09e9bSSantosh Shilimkar * memblock.current_limit if @max_addr == %BOOTMEM_ALLOC_ACCESSIBLE. 123526f09e9bSSantosh Shilimkar * 123626f09e9bSSantosh Shilimkar * The memory block is aligned on SMP_CACHE_BYTES if @align == 0. 123726f09e9bSSantosh Shilimkar * 123826f09e9bSSantosh Shilimkar * The phys address of allocated boot memory block is converted to virtual and 123926f09e9bSSantosh Shilimkar * allocated memory is reset to 0. 124026f09e9bSSantosh Shilimkar * 124126f09e9bSSantosh Shilimkar * In addition, function sets the min_count to 0 using kmemleak_alloc for 124226f09e9bSSantosh Shilimkar * allocated boot memory block, so that it is never reported as leaks. 124326f09e9bSSantosh Shilimkar * 124426f09e9bSSantosh Shilimkar * RETURNS: 124526f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 124626f09e9bSSantosh Shilimkar */ 124726f09e9bSSantosh Shilimkar static void * __init memblock_virt_alloc_internal( 124826f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 124926f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 125026f09e9bSSantosh Shilimkar int nid) 125126f09e9bSSantosh Shilimkar { 125226f09e9bSSantosh Shilimkar phys_addr_t alloc; 125326f09e9bSSantosh Shilimkar void *ptr; 1254a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 125526f09e9bSSantosh Shilimkar 1256560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1257560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 125826f09e9bSSantosh Shilimkar 125926f09e9bSSantosh Shilimkar /* 126026f09e9bSSantosh Shilimkar * Detect any accidental use of these APIs after slab is ready, as at 126126f09e9bSSantosh Shilimkar * this moment memblock may be deinitialized already and its 126226f09e9bSSantosh Shilimkar * internal data may be destroyed (after execution of free_all_bootmem) 126326f09e9bSSantosh Shilimkar */ 126426f09e9bSSantosh Shilimkar if (WARN_ON_ONCE(slab_is_available())) 126526f09e9bSSantosh Shilimkar return kzalloc_node(size, GFP_NOWAIT, nid); 126626f09e9bSSantosh Shilimkar 126726f09e9bSSantosh Shilimkar if (!align) 126826f09e9bSSantosh Shilimkar align = SMP_CACHE_BYTES; 126926f09e9bSSantosh Shilimkar 1270f544e14fSYinghai Lu if (max_addr > memblock.current_limit) 1271f544e14fSYinghai Lu max_addr = memblock.current_limit; 1272f544e14fSYinghai Lu 127326f09e9bSSantosh Shilimkar again: 127426f09e9bSSantosh Shilimkar alloc = memblock_find_in_range_node(size, align, min_addr, max_addr, 1275a3f5bafcSTony Luck nid, flags); 127626f09e9bSSantosh Shilimkar if (alloc) 127726f09e9bSSantosh Shilimkar goto done; 127826f09e9bSSantosh Shilimkar 127926f09e9bSSantosh Shilimkar if (nid != NUMA_NO_NODE) { 128026f09e9bSSantosh Shilimkar alloc = memblock_find_in_range_node(size, align, min_addr, 1281fc6daaf9STony Luck max_addr, NUMA_NO_NODE, 1282a3f5bafcSTony Luck flags); 128326f09e9bSSantosh Shilimkar if (alloc) 128426f09e9bSSantosh Shilimkar goto done; 128526f09e9bSSantosh Shilimkar } 128626f09e9bSSantosh Shilimkar 128726f09e9bSSantosh Shilimkar if (min_addr) { 128826f09e9bSSantosh Shilimkar min_addr = 0; 128926f09e9bSSantosh Shilimkar goto again; 129026f09e9bSSantosh Shilimkar } 129126f09e9bSSantosh Shilimkar 1292a3f5bafcSTony Luck if (flags & MEMBLOCK_MIRROR) { 1293a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 1294a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 1295a3f5bafcSTony Luck &size); 1296a3f5bafcSTony Luck goto again; 1297a3f5bafcSTony Luck } 1298a3f5bafcSTony Luck 1299a3f5bafcSTony Luck return NULL; 130026f09e9bSSantosh Shilimkar done: 130126f09e9bSSantosh Shilimkar memblock_reserve(alloc, size); 130226f09e9bSSantosh Shilimkar ptr = phys_to_virt(alloc); 130326f09e9bSSantosh Shilimkar memset(ptr, 0, size); 130426f09e9bSSantosh Shilimkar 130526f09e9bSSantosh Shilimkar /* 130626f09e9bSSantosh Shilimkar * The min_count is set to 0 so that bootmem allocated blocks 130726f09e9bSSantosh Shilimkar * are never reported as leaks. This is because many of these blocks 130826f09e9bSSantosh Shilimkar * are only referred via the physical address which is not 130926f09e9bSSantosh Shilimkar * looked up by kmemleak. 131026f09e9bSSantosh Shilimkar */ 131126f09e9bSSantosh Shilimkar kmemleak_alloc(ptr, size, 0, 0); 131226f09e9bSSantosh Shilimkar 131326f09e9bSSantosh Shilimkar return ptr; 131426f09e9bSSantosh Shilimkar } 131526f09e9bSSantosh Shilimkar 131626f09e9bSSantosh Shilimkar /** 131726f09e9bSSantosh Shilimkar * memblock_virt_alloc_try_nid_nopanic - allocate boot memory block 131826f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 131926f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 132026f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 132126f09e9bSSantosh Shilimkar * is preferred (phys address) 132226f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 132326f09e9bSSantosh Shilimkar * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to 132426f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 132526f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 132626f09e9bSSantosh Shilimkar * 132726f09e9bSSantosh Shilimkar * Public version of _memblock_virt_alloc_try_nid_nopanic() which provides 132826f09e9bSSantosh Shilimkar * additional debug information (including caller info), if enabled. 132926f09e9bSSantosh Shilimkar * 133026f09e9bSSantosh Shilimkar * RETURNS: 133126f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 133226f09e9bSSantosh Shilimkar */ 133326f09e9bSSantosh Shilimkar void * __init memblock_virt_alloc_try_nid_nopanic( 133426f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 133526f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 133626f09e9bSSantosh Shilimkar int nid) 133726f09e9bSSantosh Shilimkar { 133826f09e9bSSantosh Shilimkar memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", 133926f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 134026f09e9bSSantosh Shilimkar (u64)max_addr, (void *)_RET_IP_); 134126f09e9bSSantosh Shilimkar return memblock_virt_alloc_internal(size, align, min_addr, 134226f09e9bSSantosh Shilimkar max_addr, nid); 134326f09e9bSSantosh Shilimkar } 134426f09e9bSSantosh Shilimkar 134526f09e9bSSantosh Shilimkar /** 134626f09e9bSSantosh Shilimkar * memblock_virt_alloc_try_nid - allocate boot memory block with panicking 134726f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 134826f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 134926f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 135026f09e9bSSantosh Shilimkar * is preferred (phys address) 135126f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 135226f09e9bSSantosh Shilimkar * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to 135326f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 135426f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 135526f09e9bSSantosh Shilimkar * 135626f09e9bSSantosh Shilimkar * Public panicking version of _memblock_virt_alloc_try_nid_nopanic() 135726f09e9bSSantosh Shilimkar * which provides debug information (including caller info), if enabled, 135826f09e9bSSantosh Shilimkar * and panics if the request can not be satisfied. 135926f09e9bSSantosh Shilimkar * 136026f09e9bSSantosh Shilimkar * RETURNS: 136126f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 136226f09e9bSSantosh Shilimkar */ 136326f09e9bSSantosh Shilimkar void * __init memblock_virt_alloc_try_nid( 136426f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 136526f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 136626f09e9bSSantosh Shilimkar int nid) 136726f09e9bSSantosh Shilimkar { 136826f09e9bSSantosh Shilimkar void *ptr; 136926f09e9bSSantosh Shilimkar 137026f09e9bSSantosh Shilimkar memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", 137126f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 137226f09e9bSSantosh Shilimkar (u64)max_addr, (void *)_RET_IP_); 137326f09e9bSSantosh Shilimkar ptr = memblock_virt_alloc_internal(size, align, 137426f09e9bSSantosh Shilimkar min_addr, max_addr, nid); 137526f09e9bSSantosh Shilimkar if (ptr) 137626f09e9bSSantosh Shilimkar return ptr; 137726f09e9bSSantosh Shilimkar 137826f09e9bSSantosh Shilimkar panic("%s: Failed to allocate %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx\n", 137926f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 138026f09e9bSSantosh Shilimkar (u64)max_addr); 138126f09e9bSSantosh Shilimkar return NULL; 138226f09e9bSSantosh Shilimkar } 138326f09e9bSSantosh Shilimkar 138426f09e9bSSantosh Shilimkar /** 138526f09e9bSSantosh Shilimkar * __memblock_free_early - free boot memory block 138626f09e9bSSantosh Shilimkar * @base: phys starting address of the boot memory block 138726f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 138826f09e9bSSantosh Shilimkar * 138926f09e9bSSantosh Shilimkar * Free boot memory block previously allocated by memblock_virt_alloc_xx() API. 139026f09e9bSSantosh Shilimkar * The freeing memory will not be released to the buddy allocator. 139126f09e9bSSantosh Shilimkar */ 139226f09e9bSSantosh Shilimkar void __init __memblock_free_early(phys_addr_t base, phys_addr_t size) 139326f09e9bSSantosh Shilimkar { 139426f09e9bSSantosh Shilimkar memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", 139526f09e9bSSantosh Shilimkar __func__, (u64)base, (u64)base + size - 1, 139626f09e9bSSantosh Shilimkar (void *)_RET_IP_); 139726f09e9bSSantosh Shilimkar kmemleak_free_part(__va(base), size); 1398f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, base, size); 139926f09e9bSSantosh Shilimkar } 140026f09e9bSSantosh Shilimkar 140126f09e9bSSantosh Shilimkar /* 140226f09e9bSSantosh Shilimkar * __memblock_free_late - free bootmem block pages directly to buddy allocator 140326f09e9bSSantosh Shilimkar * @addr: phys starting address of the boot memory block 140426f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 140526f09e9bSSantosh Shilimkar * 140626f09e9bSSantosh Shilimkar * This is only useful when the bootmem allocator has already been torn 140726f09e9bSSantosh Shilimkar * down, but we are still initializing the system. Pages are released directly 140826f09e9bSSantosh Shilimkar * to the buddy allocator, no bootmem metadata is updated because it is gone. 140926f09e9bSSantosh Shilimkar */ 141026f09e9bSSantosh Shilimkar void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) 141126f09e9bSSantosh Shilimkar { 141226f09e9bSSantosh Shilimkar u64 cursor, end; 141326f09e9bSSantosh Shilimkar 141426f09e9bSSantosh Shilimkar memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", 141526f09e9bSSantosh Shilimkar __func__, (u64)base, (u64)base + size - 1, 141626f09e9bSSantosh Shilimkar (void *)_RET_IP_); 141726f09e9bSSantosh Shilimkar kmemleak_free_part(__va(base), size); 141826f09e9bSSantosh Shilimkar cursor = PFN_UP(base); 141926f09e9bSSantosh Shilimkar end = PFN_DOWN(base + size); 142026f09e9bSSantosh Shilimkar 142126f09e9bSSantosh Shilimkar for (; cursor < end; cursor++) { 142226f09e9bSSantosh Shilimkar __free_pages_bootmem(pfn_to_page(cursor), 0); 142326f09e9bSSantosh Shilimkar totalram_pages++; 142426f09e9bSSantosh Shilimkar } 142526f09e9bSSantosh Shilimkar } 14269d1e2492SBenjamin Herrenschmidt 14279d1e2492SBenjamin Herrenschmidt /* 14289d1e2492SBenjamin Herrenschmidt * Remaining API functions 14299d1e2492SBenjamin Herrenschmidt */ 14309d1e2492SBenjamin Herrenschmidt 14312898cc4cSBenjamin Herrenschmidt phys_addr_t __init memblock_phys_mem_size(void) 143295f72d1eSYinghai Lu { 14331440c4e2STejun Heo return memblock.memory.total_size; 143495f72d1eSYinghai Lu } 143595f72d1eSYinghai Lu 1436595ad9afSYinghai Lu phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) 1437595ad9afSYinghai Lu { 1438595ad9afSYinghai Lu unsigned long pages = 0; 1439595ad9afSYinghai Lu struct memblock_region *r; 1440595ad9afSYinghai Lu unsigned long start_pfn, end_pfn; 1441595ad9afSYinghai Lu 1442595ad9afSYinghai Lu for_each_memblock(memory, r) { 1443595ad9afSYinghai Lu start_pfn = memblock_region_memory_base_pfn(r); 1444595ad9afSYinghai Lu end_pfn = memblock_region_memory_end_pfn(r); 1445595ad9afSYinghai Lu start_pfn = min_t(unsigned long, start_pfn, limit_pfn); 1446595ad9afSYinghai Lu end_pfn = min_t(unsigned long, end_pfn, limit_pfn); 1447595ad9afSYinghai Lu pages += end_pfn - start_pfn; 1448595ad9afSYinghai Lu } 1449595ad9afSYinghai Lu 145016763230SFabian Frederick return PFN_PHYS(pages); 1451595ad9afSYinghai Lu } 1452595ad9afSYinghai Lu 14530a93ebefSSam Ravnborg /* lowest address */ 14540a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 14550a93ebefSSam Ravnborg { 14560a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 14570a93ebefSSam Ravnborg } 14580a93ebefSSam Ravnborg 145910d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 146095f72d1eSYinghai Lu { 146195f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 146295f72d1eSYinghai Lu 1463e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 146495f72d1eSYinghai Lu } 146595f72d1eSYinghai Lu 1466c0ce8fefSTejun Heo void __init memblock_enforce_memory_limit(phys_addr_t limit) 146795f72d1eSYinghai Lu { 1468c0ce8fefSTejun Heo phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; 1469136199f0SEmil Medve struct memblock_region *r; 147095f72d1eSYinghai Lu 1471c0ce8fefSTejun Heo if (!limit) 147295f72d1eSYinghai Lu return; 147395f72d1eSYinghai Lu 1474c0ce8fefSTejun Heo /* find out max address */ 1475136199f0SEmil Medve for_each_memblock(memory, r) { 1476c0ce8fefSTejun Heo if (limit <= r->size) { 1477c0ce8fefSTejun Heo max_addr = r->base + limit; 147895f72d1eSYinghai Lu break; 147995f72d1eSYinghai Lu } 1480c0ce8fefSTejun Heo limit -= r->size; 148195f72d1eSYinghai Lu } 1482c0ce8fefSTejun Heo 1483c0ce8fefSTejun Heo /* truncate both memory and reserved regions */ 1484f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.memory, max_addr, 1485f1af9d3aSPhilipp Hachtmann (phys_addr_t)ULLONG_MAX); 1486f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, max_addr, 1487f1af9d3aSPhilipp Hachtmann (phys_addr_t)ULLONG_MAX); 148895f72d1eSYinghai Lu } 148995f72d1eSYinghai Lu 1490cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 149172d4b0b4SBenjamin Herrenschmidt { 149272d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 149372d4b0b4SBenjamin Herrenschmidt 149472d4b0b4SBenjamin Herrenschmidt do { 149572d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 149672d4b0b4SBenjamin Herrenschmidt 149772d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 149872d4b0b4SBenjamin Herrenschmidt right = mid; 149972d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 150072d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 150172d4b0b4SBenjamin Herrenschmidt left = mid + 1; 150272d4b0b4SBenjamin Herrenschmidt else 150372d4b0b4SBenjamin Herrenschmidt return mid; 150472d4b0b4SBenjamin Herrenschmidt } while (left < right); 150572d4b0b4SBenjamin Herrenschmidt return -1; 150672d4b0b4SBenjamin Herrenschmidt } 150772d4b0b4SBenjamin Herrenschmidt 15082898cc4cSBenjamin Herrenschmidt int __init memblock_is_reserved(phys_addr_t addr) 150995f72d1eSYinghai Lu { 151072d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 151195f72d1eSYinghai Lu } 151272d4b0b4SBenjamin Herrenschmidt 15133661ca66SYinghai Lu int __init_memblock memblock_is_memory(phys_addr_t addr) 151472d4b0b4SBenjamin Herrenschmidt { 151572d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 151672d4b0b4SBenjamin Herrenschmidt } 151772d4b0b4SBenjamin Herrenschmidt 1518e76b63f8SYinghai Lu #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 1519e76b63f8SYinghai Lu int __init_memblock memblock_search_pfn_nid(unsigned long pfn, 1520e76b63f8SYinghai Lu unsigned long *start_pfn, unsigned long *end_pfn) 1521e76b63f8SYinghai Lu { 1522e76b63f8SYinghai Lu struct memblock_type *type = &memblock.memory; 152316763230SFabian Frederick int mid = memblock_search(type, PFN_PHYS(pfn)); 1524e76b63f8SYinghai Lu 1525e76b63f8SYinghai Lu if (mid == -1) 1526e76b63f8SYinghai Lu return -1; 1527e76b63f8SYinghai Lu 1528f7e2f7e8SFabian Frederick *start_pfn = PFN_DOWN(type->regions[mid].base); 1529f7e2f7e8SFabian Frederick *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); 1530e76b63f8SYinghai Lu 1531e76b63f8SYinghai Lu return type->regions[mid].nid; 1532e76b63f8SYinghai Lu } 1533e76b63f8SYinghai Lu #endif 1534e76b63f8SYinghai Lu 1535eab30949SStephen Boyd /** 1536eab30949SStephen Boyd * memblock_is_region_memory - check if a region is a subset of memory 1537eab30949SStephen Boyd * @base: base of region to check 1538eab30949SStephen Boyd * @size: size of region to check 1539eab30949SStephen Boyd * 1540eab30949SStephen Boyd * Check if the region [@base, @base+@size) is a subset of a memory block. 1541eab30949SStephen Boyd * 1542eab30949SStephen Boyd * RETURNS: 1543eab30949SStephen Boyd * 0 if false, non-zero if true 1544eab30949SStephen Boyd */ 15453661ca66SYinghai Lu int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 154672d4b0b4SBenjamin Herrenschmidt { 1547abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 1548eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 154972d4b0b4SBenjamin Herrenschmidt 155072d4b0b4SBenjamin Herrenschmidt if (idx == -1) 155195f72d1eSYinghai Lu return 0; 1552abb65272STomi Valkeinen return memblock.memory.regions[idx].base <= base && 1553abb65272STomi Valkeinen (memblock.memory.regions[idx].base + 1554eb18f1b5STejun Heo memblock.memory.regions[idx].size) >= end; 155595f72d1eSYinghai Lu } 155695f72d1eSYinghai Lu 1557eab30949SStephen Boyd /** 1558eab30949SStephen Boyd * memblock_is_region_reserved - check if a region intersects reserved memory 1559eab30949SStephen Boyd * @base: base of region to check 1560eab30949SStephen Boyd * @size: size of region to check 1561eab30949SStephen Boyd * 1562eab30949SStephen Boyd * Check if the region [@base, @base+@size) intersects a reserved memory block. 1563eab30949SStephen Boyd * 1564eab30949SStephen Boyd * RETURNS: 1565eab30949SStephen Boyd * 0 if false, non-zero if true 1566eab30949SStephen Boyd */ 156710d06439SYinghai Lu int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 156895f72d1eSYinghai Lu { 1569eb18f1b5STejun Heo memblock_cap_size(base, &size); 1570f1c2c19cSBenjamin Herrenschmidt return memblock_overlaps_region(&memblock.reserved, base, size) >= 0; 157195f72d1eSYinghai Lu } 157295f72d1eSYinghai Lu 15736ede1fd3SYinghai Lu void __init_memblock memblock_trim_memory(phys_addr_t align) 15746ede1fd3SYinghai Lu { 15756ede1fd3SYinghai Lu phys_addr_t start, end, orig_start, orig_end; 1576136199f0SEmil Medve struct memblock_region *r; 15776ede1fd3SYinghai Lu 1578136199f0SEmil Medve for_each_memblock(memory, r) { 1579136199f0SEmil Medve orig_start = r->base; 1580136199f0SEmil Medve orig_end = r->base + r->size; 15816ede1fd3SYinghai Lu start = round_up(orig_start, align); 15826ede1fd3SYinghai Lu end = round_down(orig_end, align); 15836ede1fd3SYinghai Lu 15846ede1fd3SYinghai Lu if (start == orig_start && end == orig_end) 15856ede1fd3SYinghai Lu continue; 15866ede1fd3SYinghai Lu 15876ede1fd3SYinghai Lu if (start < end) { 1588136199f0SEmil Medve r->base = start; 1589136199f0SEmil Medve r->size = end - start; 15906ede1fd3SYinghai Lu } else { 1591136199f0SEmil Medve memblock_remove_region(&memblock.memory, 1592136199f0SEmil Medve r - memblock.memory.regions); 1593136199f0SEmil Medve r--; 15946ede1fd3SYinghai Lu } 15956ede1fd3SYinghai Lu } 15966ede1fd3SYinghai Lu } 1597e63075a3SBenjamin Herrenschmidt 15983661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 1599e63075a3SBenjamin Herrenschmidt { 1600e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 1601e63075a3SBenjamin Herrenschmidt } 1602e63075a3SBenjamin Herrenschmidt 1603fec51014SLaura Abbott phys_addr_t __init_memblock memblock_get_current_limit(void) 1604fec51014SLaura Abbott { 1605fec51014SLaura Abbott return memblock.current_limit; 1606fec51014SLaura Abbott } 1607fec51014SLaura Abbott 16087c0caeb8STejun Heo static void __init_memblock memblock_dump(struct memblock_type *type, char *name) 16096ed311b2SBenjamin Herrenschmidt { 16106ed311b2SBenjamin Herrenschmidt unsigned long long base, size; 161166a20757STang Chen unsigned long flags; 16126ed311b2SBenjamin Herrenschmidt int i; 16136ed311b2SBenjamin Herrenschmidt 16147c0caeb8STejun Heo pr_info(" %s.cnt = 0x%lx\n", name, type->cnt); 16156ed311b2SBenjamin Herrenschmidt 16167c0caeb8STejun Heo for (i = 0; i < type->cnt; i++) { 16177c0caeb8STejun Heo struct memblock_region *rgn = &type->regions[i]; 16187c0caeb8STejun Heo char nid_buf[32] = ""; 16196ed311b2SBenjamin Herrenschmidt 16207c0caeb8STejun Heo base = rgn->base; 16217c0caeb8STejun Heo size = rgn->size; 162266a20757STang Chen flags = rgn->flags; 16237c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 16247c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 16257c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 16267c0caeb8STejun Heo memblock_get_region_node(rgn)); 16277c0caeb8STejun Heo #endif 162866a20757STang Chen pr_info(" %s[%#x]\t[%#016llx-%#016llx], %#llx bytes%s flags: %#lx\n", 162966a20757STang Chen name, i, base, base + size - 1, size, nid_buf, flags); 16306ed311b2SBenjamin Herrenschmidt } 16316ed311b2SBenjamin Herrenschmidt } 16326ed311b2SBenjamin Herrenschmidt 16334ff7b82fSTejun Heo void __init_memblock __memblock_dump_all(void) 16346ed311b2SBenjamin Herrenschmidt { 16356ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 16361440c4e2STejun Heo pr_info(" memory size = %#llx reserved size = %#llx\n", 16371440c4e2STejun Heo (unsigned long long)memblock.memory.total_size, 16381440c4e2STejun Heo (unsigned long long)memblock.reserved.total_size); 16396ed311b2SBenjamin Herrenschmidt 16406ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.memory, "memory"); 16416ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.reserved, "reserved"); 16426ed311b2SBenjamin Herrenschmidt } 16436ed311b2SBenjamin Herrenschmidt 16441aadc056STejun Heo void __init memblock_allow_resize(void) 16456ed311b2SBenjamin Herrenschmidt { 1646142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 16476ed311b2SBenjamin Herrenschmidt } 16486ed311b2SBenjamin Herrenschmidt 16496ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 16506ed311b2SBenjamin Herrenschmidt { 16516ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 16526ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 16536ed311b2SBenjamin Herrenschmidt return 0; 16546ed311b2SBenjamin Herrenschmidt } 16556ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 16566ed311b2SBenjamin Herrenschmidt 1657c378ddd5STejun Heo #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) 16586d03b885SBenjamin Herrenschmidt 16596d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 16606d03b885SBenjamin Herrenschmidt { 16616d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 16626d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 16636d03b885SBenjamin Herrenschmidt int i; 16646d03b885SBenjamin Herrenschmidt 16656d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 16666d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 16676d03b885SBenjamin Herrenschmidt seq_printf(m, "%4d: ", i); 16686d03b885SBenjamin Herrenschmidt if (sizeof(phys_addr_t) == 4) 16696d03b885SBenjamin Herrenschmidt seq_printf(m, "0x%08lx..0x%08lx\n", 16706d03b885SBenjamin Herrenschmidt (unsigned long)reg->base, 16716d03b885SBenjamin Herrenschmidt (unsigned long)(reg->base + reg->size - 1)); 16726d03b885SBenjamin Herrenschmidt else 16736d03b885SBenjamin Herrenschmidt seq_printf(m, "0x%016llx..0x%016llx\n", 16746d03b885SBenjamin Herrenschmidt (unsigned long long)reg->base, 16756d03b885SBenjamin Herrenschmidt (unsigned long long)(reg->base + reg->size - 1)); 16766d03b885SBenjamin Herrenschmidt 16776d03b885SBenjamin Herrenschmidt } 16786d03b885SBenjamin Herrenschmidt return 0; 16796d03b885SBenjamin Herrenschmidt } 16806d03b885SBenjamin Herrenschmidt 16816d03b885SBenjamin Herrenschmidt static int memblock_debug_open(struct inode *inode, struct file *file) 16826d03b885SBenjamin Herrenschmidt { 16836d03b885SBenjamin Herrenschmidt return single_open(file, memblock_debug_show, inode->i_private); 16846d03b885SBenjamin Herrenschmidt } 16856d03b885SBenjamin Herrenschmidt 16866d03b885SBenjamin Herrenschmidt static const struct file_operations memblock_debug_fops = { 16876d03b885SBenjamin Herrenschmidt .open = memblock_debug_open, 16886d03b885SBenjamin Herrenschmidt .read = seq_read, 16896d03b885SBenjamin Herrenschmidt .llseek = seq_lseek, 16906d03b885SBenjamin Herrenschmidt .release = single_release, 16916d03b885SBenjamin Herrenschmidt }; 16926d03b885SBenjamin Herrenschmidt 16936d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 16946d03b885SBenjamin Herrenschmidt { 16956d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 16966d03b885SBenjamin Herrenschmidt if (!root) 16976d03b885SBenjamin Herrenschmidt return -ENXIO; 16986d03b885SBenjamin Herrenschmidt debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); 16996d03b885SBenjamin Herrenschmidt debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); 170070210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 170170210ed9SPhilipp Hachtmann debugfs_create_file("physmem", S_IRUGO, root, &memblock.physmem, &memblock_debug_fops); 170270210ed9SPhilipp Hachtmann #endif 17036d03b885SBenjamin Herrenschmidt 17046d03b885SBenjamin Herrenschmidt return 0; 17056d03b885SBenjamin Herrenschmidt } 17066d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 17076d03b885SBenjamin Herrenschmidt 17086d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 1709