217 lines
6.4 KiB
C
217 lines
6.4 KiB
C
#ifndef _LINUX_MEMBLOCK_H
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#define _LINUX_MEMBLOCK_H
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#ifdef __KERNEL__
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#ifdef CONFIG_HAVE_MEMBLOCK
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/*
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* Logical memory blocks.
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*
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* Copyright (C) 2001 Peter Bergner, IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/mm.h>
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#define INIT_MEMBLOCK_REGIONS 128
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struct memblock_region {
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phys_addr_t base;
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phys_addr_t size;
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#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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int nid;
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#endif
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};
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struct memblock_type {
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unsigned long cnt; /* number of regions */
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unsigned long max; /* size of the allocated array */
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struct memblock_region *regions;
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};
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struct memblock {
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phys_addr_t current_limit;
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phys_addr_t memory_size; /* Updated by memblock_analyze() */
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struct memblock_type memory;
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struct memblock_type reserved;
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};
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extern struct memblock memblock;
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extern int memblock_debug;
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extern int memblock_can_resize;
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#define memblock_dbg(fmt, ...) \
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if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
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phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
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phys_addr_t size, phys_addr_t align);
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int memblock_free_reserved_regions(void);
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int memblock_reserve_reserved_regions(void);
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extern void memblock_init(void);
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extern void memblock_analyze(void);
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extern long memblock_add(phys_addr_t base, phys_addr_t size);
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extern long memblock_remove(phys_addr_t base, phys_addr_t size);
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extern long memblock_free(phys_addr_t base, phys_addr_t size);
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extern long memblock_reserve(phys_addr_t base, phys_addr_t size);
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extern void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start,
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phys_addr_t *out_end, int *out_nid);
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/**
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* for_each_free_mem_range - iterate through free memblock areas
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* @i: u64 used as loop variable
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* @nid: node selector, %MAX_NUMNODES for all nodes
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* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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* @p_nid: ptr to int for nid of the range, can be %NULL
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*
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* Walks over free (memory && !reserved) areas of memblock. Available as
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* soon as memblock is initialized.
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*/
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#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
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for (i = 0, \
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__next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
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i != (u64)ULLONG_MAX; \
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__next_free_mem_range(&i, nid, p_start, p_end, p_nid))
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#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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extern int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid);
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static inline void memblock_set_region_node(struct memblock_region *r, int nid)
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{
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r->nid = nid;
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}
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static inline int memblock_get_region_node(const struct memblock_region *r)
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{
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return r->nid;
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}
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#else
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static inline void memblock_set_region_node(struct memblock_region *r, int nid)
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{
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}
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static inline int memblock_get_region_node(const struct memblock_region *r)
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{
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return 0;
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}
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#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
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/* The numa aware allocator is only available if
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* CONFIG_ARCH_POPULATES_NODE_MAP is set
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*/
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extern phys_addr_t memblock_find_in_range_node(phys_addr_t start,
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phys_addr_t end,
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phys_addr_t size,
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phys_addr_t align, int nid);
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extern phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align,
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int nid);
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extern phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align,
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int nid);
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extern phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
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/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
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#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
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#define MEMBLOCK_ALLOC_ACCESSIBLE 0
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extern phys_addr_t memblock_alloc_base(phys_addr_t size,
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phys_addr_t align,
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phys_addr_t max_addr);
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extern phys_addr_t __memblock_alloc_base(phys_addr_t size,
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phys_addr_t align,
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phys_addr_t max_addr);
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extern phys_addr_t memblock_phys_mem_size(void);
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extern phys_addr_t memblock_end_of_DRAM(void);
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extern void memblock_enforce_memory_limit(phys_addr_t memory_limit);
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extern int memblock_is_memory(phys_addr_t addr);
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extern int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
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extern int memblock_is_reserved(phys_addr_t addr);
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extern int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
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extern void memblock_dump_all(void);
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/**
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* memblock_set_current_limit - Set the current allocation limit to allow
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* limiting allocations to what is currently
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* accessible during boot
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* @limit: New limit value (physical address)
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*/
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extern void memblock_set_current_limit(phys_addr_t limit);
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/*
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* pfn conversion functions
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*
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* While the memory MEMBLOCKs should always be page aligned, the reserved
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* MEMBLOCKs may not be. This accessor attempt to provide a very clear
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* idea of what they return for such non aligned MEMBLOCKs.
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*/
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/**
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* memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
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* @reg: memblock_region structure
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*/
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static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
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{
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return PFN_UP(reg->base);
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}
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/**
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* memblock_region_memory_end_pfn - Return the end_pfn this region
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* @reg: memblock_region structure
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*/
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static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
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{
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return PFN_DOWN(reg->base + reg->size);
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}
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/**
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* memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
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* @reg: memblock_region structure
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*/
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static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
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{
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return PFN_DOWN(reg->base);
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}
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/**
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* memblock_region_reserved_end_pfn - Return the end_pfn this region
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* @reg: memblock_region structure
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*/
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static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
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{
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return PFN_UP(reg->base + reg->size);
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}
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#define for_each_memblock(memblock_type, region) \
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for (region = memblock.memblock_type.regions; \
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region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
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region++)
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#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
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#define __init_memblock __meminit
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#define __initdata_memblock __meminitdata
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#else
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#define __init_memblock
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#define __initdata_memblock
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#endif
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#else
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static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
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{
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return 0;
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}
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#endif /* CONFIG_HAVE_MEMBLOCK */
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#endif /* __KERNEL__ */
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#endif /* _LINUX_MEMBLOCK_H */
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