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f98eeb4eb1
There were several issues if a memreserve range existed and happened to be in highmem: * The bootmem allocator is only aware of lowmem so calling reserve_bootmem with a highmem address would cause a BUG_ON * All highmem pages were provided to the buddy allocator Added a lmb_is_reserved() api that we now use to determine if a highem page should continue to be PageReserved or provided to the buddy allocator. Also, we incorrectly reported the amount of pages reserved since all highmem pages are initally marked reserved and we clear the PageReserved flag as we "free" up the highmem pages. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
#ifndef _ASM_POWERPC_LMB_H
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#define _ASM_POWERPC_LMB_H
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#ifdef __KERNEL__
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/*
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* Definitions for talking to the Open Firmware PROM on
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* Power Macintosh computers.
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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 <asm/prom.h>
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#define MAX_LMB_REGIONS 128
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struct lmb_property {
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unsigned long base;
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unsigned long size;
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};
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struct lmb_region {
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unsigned long cnt;
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unsigned long 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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unsigned long 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(unsigned long base, unsigned long size);
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extern long __init lmb_reserve(unsigned long base, unsigned long size);
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extern unsigned long __init lmb_alloc(unsigned long size, unsigned long align);
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extern unsigned long __init lmb_alloc_base(unsigned long size,
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unsigned long align, unsigned long max_addr);
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extern unsigned long __init __lmb_alloc_base(unsigned long size,
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unsigned long align, unsigned long max_addr);
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extern unsigned long __init lmb_phys_mem_size(void);
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extern unsigned long __init lmb_end_of_DRAM(void);
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extern void __init lmb_enforce_memory_limit(unsigned long memory_limit);
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extern int __init lmb_is_reserved(unsigned long addr);
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extern void lmb_dump_all(void);
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static inline unsigned long
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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 unsigned long
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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 unsigned long
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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 unsigned long
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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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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_LMB_H */
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