5dca6a1bb0
fix the bug reported here: http://bugzilla.kernel.org/show_bug.cgi?id=10232 use update_memory_range() instead of add_memory_range() directly to avoid closing the gap. ( the new code only affects and runs on systems where the MTRR workaround triggers. ) Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
52 lines
2.0 KiB
C
52 lines
2.0 KiB
C
/*
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* structures and definitions for the int 15, ax=e820 memory map
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* scheme.
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*
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* In a nutshell, setup.S populates a scratch table in the
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* empty_zero_block that contains a list of usable address/size
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* duples. setup.c, this information is transferred into the e820map,
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* and in init.c/numa.c, that new information is used to mark pages
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* reserved or not.
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*/
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#ifndef __E820_HEADER
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#define __E820_HEADER
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#include <linux/ioport.h>
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#ifndef __ASSEMBLY__
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extern unsigned long find_e820_area(unsigned long start, unsigned long end,
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unsigned size, unsigned long align);
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extern void add_memory_region(unsigned long start, unsigned long size,
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int type);
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extern void update_memory_range(u64 start, u64 size, unsigned old_type,
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unsigned new_type);
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extern void setup_memory_region(void);
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extern void contig_e820_setup(void);
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extern unsigned long e820_end_of_ram(void);
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extern void e820_reserve_resources(struct resource *code_resource,
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struct resource *data_resource, struct resource *bss_resource);
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extern void e820_mark_nosave_regions(void);
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extern int e820_any_mapped(unsigned long start, unsigned long end, unsigned type);
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extern int e820_all_mapped(unsigned long start, unsigned long end, unsigned type);
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extern int e820_any_non_reserved(unsigned long start, unsigned long end);
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extern int is_memory_any_valid(unsigned long start, unsigned long end);
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extern int e820_all_non_reserved(unsigned long start, unsigned long end);
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extern int is_memory_all_valid(unsigned long start, unsigned long end);
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extern unsigned long e820_hole_size(unsigned long start, unsigned long end);
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extern void e820_setup_gap(void);
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extern void e820_register_active_regions(int nid,
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unsigned long start_pfn, unsigned long end_pfn);
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extern void finish_e820_parsing(void);
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extern struct e820map e820;
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extern void update_e820(void);
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extern void reserve_early(unsigned long start, unsigned long end, char *name);
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extern void early_res_to_bootmem(void);
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#endif/*!__ASSEMBLY__*/
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#endif/*__E820_HEADER*/
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