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123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
#ifndef _LINUX_MEMBLOCK_H
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#define _LINUX_MEMBLOCK_H
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#ifdef __KERNEL__
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/*
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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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#include <asm/memblock.h>
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#define MAX_MEMBLOCK_REGIONS 128
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struct memblock_region {
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u64 base;
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u64 size;
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};
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struct memblock_type {
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unsigned long cnt;
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u64 size;
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struct memblock_region regions[MAX_MEMBLOCK_REGIONS+1];
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};
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struct memblock {
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unsigned long debug;
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u64 rmo_size;
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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 void __init memblock_init(void);
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extern void __init memblock_analyze(void);
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extern long memblock_add(u64 base, u64 size);
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extern long memblock_remove(u64 base, u64 size);
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extern long __init memblock_free(u64 base, u64 size);
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extern long __init memblock_reserve(u64 base, u64 size);
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extern u64 __init memblock_alloc_nid(u64 size, u64 align, int nid);
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extern u64 __init memblock_alloc(u64 size, u64 align);
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extern u64 __init memblock_alloc_base(u64 size,
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u64, u64 max_addr);
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extern u64 __init __memblock_alloc_base(u64 size,
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u64 align, u64 max_addr);
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extern u64 __init memblock_phys_mem_size(void);
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extern u64 memblock_end_of_DRAM(void);
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extern void __init memblock_enforce_memory_limit(u64 memory_limit);
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extern int memblock_is_memory(u64 addr);
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extern int memblock_is_region_memory(u64 base, u64 size);
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extern int __init memblock_is_reserved(u64 addr);
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extern int memblock_is_region_reserved(u64 base, u64 size);
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extern void memblock_dump_all(void);
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/* Provided by the architecture */
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extern u64 memblock_nid_range(u64 start, u64 end, int *nid);
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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_base_pfn - Return the lowest pfn intersecting with the region
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* @reg: memblock_region structure
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*/
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static inline unsigned long memblock_region_base_pfn(const struct memblock_region *reg)
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{
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return reg->base >> PAGE_SHIFT;
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}
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/**
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* memblock_region_last_pfn - Return the highest pfn intersecting with the region
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* @reg: memblock_region structure
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*/
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static inline unsigned long memblock_region_last_pfn(const struct memblock_region *reg)
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{
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return (reg->base + reg->size - 1) >> PAGE_SHIFT;
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}
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/**
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* memblock_region_end_pfn - Return the pfn of the first page following the region
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* but not intersecting it
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* @reg: memblock_region structure
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*/
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static inline unsigned long memblock_region_end_pfn(const struct memblock_region *reg)
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{
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return memblock_region_last_pfn(reg) + 1;
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}
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/**
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* memblock_region_pages - Return the number of pages covering a region
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* @reg: memblock_region structure
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*/
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static inline unsigned long memblock_region_pages(const struct memblock_region *reg)
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{
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return memblock_region_end_pfn(reg) - memblock_region_end_pfn(reg);
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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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#endif /* __KERNEL__ */
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#endif /* _LINUX_MEMBLOCK_H */
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