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#ifndef _LINUX_MEMBLOCK_H #define _LINUX_MEMBLOCK_H #ifdef __KERNEL__ #ifdef CONFIG_HAVE_MEMBLOCK /* * Logical memory blocks. * * Copyright (C) 2001 Peter Bergner, IBM Corp. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/init.h> #include <linux/mm.h> #define INIT_MEMBLOCK_REGIONS 128 #define INIT_PHYSMEM_REGIONS 4 /* Definition of memblock flags. */ enum { MEMBLOCK_NONE = 0x0, /* No special request */ MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */ MEMBLOCK_MIRROR = 0x2, /* mirrored region */ }; struct memblock_region { phys_addr_t base; phys_addr_t size; unsigned long flags; #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP int nid; #endif }; struct memblock_type { unsigned long cnt; /* number of regions */ unsigned long max; /* size of the allocated array */ phys_addr_t total_size; /* size of all regions */ struct memblock_region *regions; }; struct memblock { bool bottom_up; /* is bottom up direction? */ phys_addr_t current_limit; struct memblock_type memory; struct memblock_type reserved; #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP struct memblock_type physmem; #endif }; extern struct memblock memblock; extern int memblock_debug; #ifdef CONFIG_MOVABLE_NODE /* If movable_node boot option specified */ extern bool movable_node_enabled; #endif /* CONFIG_MOVABLE_NODE */ #define memblock_dbg(fmt, ...) \ if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align, phys_addr_t start, phys_addr_t end, int nid, ulong flags); phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end, phys_addr_t size, phys_addr_t align); phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr); phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr); void memblock_allow_resize(void); int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid); int memblock_add(phys_addr_t base, phys_addr_t size); int memblock_remove(phys_addr_t base, phys_addr_t size); int memblock_free(phys_addr_t base, phys_addr_t size); int memblock_reserve(phys_addr_t base, phys_addr_t size); void memblock_trim_memory(phys_addr_t align); bool memblock_overlaps_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size); int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size); int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size); int memblock_mark_mirror(phys_addr_t base, phys_addr_t size); ulong choose_memblock_flags(void); /* Low level functions */ int memblock_add_range(struct memblock_type *type, phys_addr_t base, phys_addr_t size, int nid, unsigned long flags); void __next_mem_range(u64 *idx, int nid, ulong flags, struct memblock_type *type_a, struct memblock_type *type_b, phys_addr_t *out_start, phys_addr_t *out_end, int *out_nid); void __next_mem_range_rev(u64 *idx, int nid, ulong flags, struct memblock_type *type_a, struct memblock_type *type_b, phys_addr_t *out_start, phys_addr_t *out_end, int *out_nid); void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start, phys_addr_t *out_end); /** * for_each_mem_range - iterate through memblock areas from type_a and not * included in type_b. Or just type_a if type_b is NULL. * @i: u64 used as loop variable * @type_a: ptr to memblock_type to iterate * @type_b: ptr to memblock_type which excludes from the iteration * @nid: node selector, %NUMA_NO_NODE for all nodes * @flags: pick from blocks based on memory attributes * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL * @p_nid: ptr to int for nid of the range, can be %NULL */ #define for_each_mem_range(i, type_a, type_b, nid, flags, \ p_start, p_end, p_nid) \ for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \ p_start, p_end, p_nid); \ i != (u64)ULLONG_MAX; \ __next_mem_range(&i, nid, flags, type_a, type_b, \ p_start, p_end, p_nid)) /** * for_each_mem_range_rev - reverse iterate through memblock areas from * type_a and not included in type_b. Or just type_a if type_b is NULL. * @i: u64 used as loop variable * @type_a: ptr to memblock_type to iterate * @type_b: ptr to memblock_type which excludes from the iteration * @nid: node selector, %NUMA_NO_NODE for all nodes * @flags: pick from blocks based on memory attributes * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL * @p_nid: ptr to int for nid of the range, can be %NULL */ #define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \ p_start, p_end, p_nid) \ for (i = (u64)ULLONG_MAX, \ __next_mem_range_rev(&i, nid, flags, type_a, type_b,\ p_start, p_end, p_nid); \ i != (u64)ULLONG_MAX; \ __next_mem_range_rev(&i, nid, flags, type_a, type_b, \ p_start, p_end, p_nid)) /** * for_each_reserved_mem_region - iterate over all reserved memblock areas * @i: u64 used as loop variable * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL * * Walks over reserved areas of memblock. Available as soon as memblock * is initialized. */ #define for_each_reserved_mem_region(i, p_start, p_end) \ for (i = 0UL, \ __next_reserved_mem_region(&i, p_start, p_end); \ i != (u64)ULLONG_MAX; \ __next_reserved_mem_region(&i, p_start, p_end)) #ifdef CONFIG_MOVABLE_NODE static inline bool memblock_is_hotpluggable(struct memblock_region *m) { return m->flags & MEMBLOCK_HOTPLUG; } static inline bool movable_node_is_enabled(void) { return movable_node_enabled; } #else static inline bool memblock_is_hotpluggable(struct memblock_region *m) { return false; } static inline bool movable_node_is_enabled(void) { return false; } #endif static inline bool memblock_is_mirror(struct memblock_region *m) { return m->flags & MEMBLOCK_MIRROR; } #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, unsigned long *end_pfn); void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, unsigned long *out_end_pfn, int *out_nid); /** * for_each_mem_pfn_range - early memory pfn range iterator * @i: an integer used as loop variable * @nid: node selector, %MAX_NUMNODES for all nodes * @p_start: ptr to ulong for start pfn of the range, can be %NULL * @p_end: ptr to ulong for end pfn of the range, can be %NULL * @p_nid: ptr to int for nid of the range, can be %NULL * * Walks over configured memory ranges. */ #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ /** * for_each_free_mem_range - iterate through free memblock areas * @i: u64 used as loop variable * @nid: node selector, %NUMA_NO_NODE for all nodes * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL * @p_nid: ptr to int for nid of the range, can be %NULL * @flags: pick from blocks based on memory attributes * * Walks over free (memory && !reserved) areas of memblock. Available as * soon as memblock is initialized. */ #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \ for_each_mem_range(i, &memblock.memory, &memblock.reserved, \ nid, flags, p_start, p_end, p_nid) /** * for_each_free_mem_range_reverse - rev-iterate through free memblock areas * @i: u64 used as loop variable * @nid: node selector, %NUMA_NO_NODE for all nodes * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL * @p_nid: ptr to int for nid of the range, can be %NULL * @flags: pick from blocks based on memory attributes * * Walks over free (memory && !reserved) areas of memblock in reverse * order. Available as soon as memblock is initialized. */ #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \ p_nid) \ for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \ nid, flags, p_start, p_end, p_nid) static inline void memblock_set_region_flags(struct memblock_region *r, unsigned long flags) { r->flags |= flags; } static inline void memblock_clear_region_flags(struct memblock_region *r, unsigned long flags) { r->flags &= ~flags; } #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP int memblock_set_node(phys_addr_t base, phys_addr_t size, struct memblock_type *type, int nid); static inline void memblock_set_region_node(struct memblock_region *r, int nid) { r->nid = nid; } static inline int memblock_get_region_node(const struct memblock_region *r) { return r->nid; } #else static inline void memblock_set_region_node(struct memblock_region *r, int nid) { } static inline int memblock_get_region_node(const struct memblock_region *r) { return 0; } #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid); phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); #ifdef CONFIG_MOVABLE_NODE /* * Set the allocation direction to bottom-up or top-down. */ static inline void __init memblock_set_bottom_up(bool enable) { memblock.bottom_up = enable; } /* * Check if the allocation direction is bottom-up or not. * if this is true, that said, memblock will allocate memory * in bottom-up direction. */ static inline bool memblock_bottom_up(void) { return memblock.bottom_up; } #else static inline void __init memblock_set_bottom_up(bool enable) {} static inline bool memblock_bottom_up(void) { return false; } #endif /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) #define MEMBLOCK_ALLOC_ACCESSIBLE 0 phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, phys_addr_t start, phys_addr_t end, ulong flags); phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr); phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr); phys_addr_t memblock_phys_mem_size(void); phys_addr_t memblock_mem_size(unsigned long limit_pfn); phys_addr_t memblock_start_of_DRAM(void); phys_addr_t memblock_end_of_DRAM(void); void memblock_enforce_memory_limit(phys_addr_t memory_limit); int memblock_is_memory(phys_addr_t addr); int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); int memblock_is_reserved(phys_addr_t addr); bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); extern void __memblock_dump_all(void); static inline void memblock_dump_all(void) { if (memblock_debug) __memblock_dump_all(); } /** * memblock_set_current_limit - Set the current allocation limit to allow * limiting allocations to what is currently * accessible during boot * @limit: New limit value (physical address) */ void memblock_set_current_limit(phys_addr_t limit); phys_addr_t memblock_get_current_limit(void); /* * pfn conversion functions * * While the memory MEMBLOCKs should always be page aligned, the reserved * MEMBLOCKs may not be. This accessor attempt to provide a very clear * idea of what they return for such non aligned MEMBLOCKs. */ /** * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region * @reg: memblock_region structure */ static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) { return PFN_UP(reg->base); } /** * memblock_region_memory_end_pfn - Return the end_pfn this region * @reg: memblock_region structure */ static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) { return PFN_DOWN(reg->base + reg->size); } /** * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region * @reg: memblock_region structure */ static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) { return PFN_DOWN(reg->base); } /** * memblock_region_reserved_end_pfn - Return the end_pfn this region * @reg: memblock_region structure */ static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) { return PFN_UP(reg->base + reg->size); } #define for_each_memblock(memblock_type, region) \ for (region = memblock.memblock_type.regions; \ region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ region++) #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK #define __init_memblock __meminit #define __initdata_memblock __meminitdata #else #define __init_memblock #define __initdata_memblock #endif #ifdef CONFIG_MEMTEST extern void early_memtest(phys_addr_t start, phys_addr_t end); #else static inline void early_memtest(phys_addr_t start, phys_addr_t end) { } #endif #else static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) { return 0; } #endif /* CONFIG_HAVE_MEMBLOCK */ #endif /* __KERNEL__ */ #endif /* _LINUX_MEMBLOCK_H */


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