c50f68c8ae
A variant of lmb_alloc() that tries to allocate memory on a specified NUMA node 'nid' but falls back to normal lmb_alloc() if that fails. The caller provides a 'nid_range' function pointer which assists the allocator. It is given args 'start', 'end', and pointer to integer 'this_nid'. It places at 'this_nid' the NUMA node id that corresponds to 'start', and returns the end address within 'start' to 'end' at which memory assosciated with 'nid' ends. This callback allows a platform to use lmb_alloc_nid() in just about any context, even ones in which early_pfn_to_nid() might not be working yet. This function will be used by the NUMA setup code on sparc64, and also it can be used by powerpc, replacing it's hand crafted "careful_allocation()" function in arch/powerpc/mm/numa.c If x86 ever converts it's NUMA support over to using the LMB helpers, it can use this too as it has something entirely similar. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
86 lines
2 KiB
C
86 lines
2 KiB
C
#ifndef _LINUX_LMB_H
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#define _LINUX_LMB_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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#define MAX_LMB_REGIONS 128
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struct lmb_property {
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u64 base;
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u64 size;
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};
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struct lmb_region {
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unsigned long cnt;
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u64 size;
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struct lmb_property region[MAX_LMB_REGIONS+1];
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};
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struct lmb {
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unsigned long debug;
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u64 rmo_size;
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struct lmb_region memory;
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struct lmb_region reserved;
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};
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extern struct lmb lmb;
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extern void __init lmb_init(void);
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extern void __init lmb_analyze(void);
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extern long __init lmb_add(u64 base, u64 size);
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extern long __init lmb_reserve(u64 base, u64 size);
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extern u64 __init lmb_alloc_nid(u64 size, u64 align, int nid,
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u64 (*nid_range)(u64, u64, int *));
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extern u64 __init lmb_alloc(u64 size, u64 align);
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extern u64 __init lmb_alloc_base(u64 size,
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u64, u64 max_addr);
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extern u64 __init __lmb_alloc_base(u64 size,
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u64 align, u64 max_addr);
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extern u64 __init lmb_phys_mem_size(void);
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extern u64 __init lmb_end_of_DRAM(void);
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extern void __init lmb_enforce_memory_limit(u64 memory_limit);
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extern int __init lmb_is_reserved(u64 addr);
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extern void lmb_dump_all(void);
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static inline u64
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lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
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{
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return type->region[region_nr].size;
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}
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static inline u64
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lmb_size_pages(struct lmb_region *type, unsigned long region_nr)
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{
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return lmb_size_bytes(type, region_nr) >> PAGE_SHIFT;
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}
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static inline u64
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lmb_start_pfn(struct lmb_region *type, unsigned long region_nr)
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{
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return type->region[region_nr].base >> PAGE_SHIFT;
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}
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static inline u64
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lmb_end_pfn(struct lmb_region *type, unsigned long region_nr)
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{
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return lmb_start_pfn(type, region_nr) +
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lmb_size_pages(type, region_nr);
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}
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#include <asm/lmb.h>
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#endif /* __KERNEL__ */
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#endif /* _LINUX_LMB_H */
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