| #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 */ |
| MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */ |
| }; |
| |
| 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 */ |
| |
| #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
| #define __init_memblock __meminit |
| #define __initdata_memblock __meminitdata |
| void memblock_discard(void); |
| #else |
| #define __init_memblock |
| #define __initdata_memblock |
| #endif |
| |
| #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); |
| 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); |
| int memblock_mark_nomap(phys_addr_t base, phys_addr_t size); |
| ulong choose_memblock_flags(void); |
| unsigned long memblock_region_resize_late_begin(void); |
| void memblock_region_resize_late_end(unsigned long); |
| |
| /* 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); |
| |
| void __memblock_free_early(phys_addr_t base, phys_addr_t size); |
| void __memblock_free_late(phys_addr_t base, phys_addr_t size); |
| |
| /** |
| * 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 __init_memblock 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; |
| } |
| |
| static inline bool memblock_is_nomap(struct memblock_region *m) |
| { |
| return m->flags & MEMBLOCK_NOMAP; |
| } |
| |
| #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 |
| * @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 |
| * |
| * 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 |
| * @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 |
| * |
| * 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_reserved_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); |
| void memblock_mem_limit_remove_map(phys_addr_t limit); |
| bool memblock_is_memory(phys_addr_t addr); |
| int memblock_is_map_memory(phys_addr_t addr); |
| int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); |
| bool memblock_is_reserved(phys_addr_t addr); |
| bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); |
| bool memblock_overlaps_memory(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++) |
| |
| #define for_each_memblock_type(memblock_type, rgn) \ |
| for (idx = 0, rgn = &memblock_type->regions[0]; \ |
| idx < memblock_type->cnt; \ |
| idx++, rgn = &memblock_type->regions[idx]) |
| #define for_each_memblock_rev(memblock_type, region) \ |
| for (region = memblock.memblock_type.regions + \ |
| memblock.memblock_type.cnt - 1; \ |
| region >= memblock.memblock_type.regions; \ |
| region--) |
| |
| #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 |
| |
| extern unsigned long memblock_reserved_memory_within(phys_addr_t start_addr, |
| phys_addr_t end_addr); |
| #else |
| static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) |
| { |
| return 0; |
| } |
| |
| static inline unsigned long memblock_reserved_memory_within(phys_addr_t start_addr, |
| phys_addr_t end_addr) |
| { |
| return 0; |
| } |
| |
| #endif /* CONFIG_HAVE_MEMBLOCK */ |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _LINUX_MEMBLOCK_H */ |