bf62f3981c
and make e820_mark_nosave_regions to take limit_pfn to use max_low_pfn for 32bit and end_pfn for 64bit Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
#ifndef __ASM_E820_H
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#define __ASM_E820_H
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#define E820MAP 0x2d0 /* our map */
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#define E820MAX 128 /* number of entries in E820MAP */
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/*
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* Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the
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* constrained space in the zeropage. If we have more nodes than
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* that, and if we've booted off EFI firmware, then the EFI tables
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* passed us from the EFI firmware can list more nodes. Size our
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* internal memory map tables to have room for these additional
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* nodes, based on up to three entries per node for which the
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* kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT),
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* plus E820MAX, allowing space for the possible duplicate E820
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* entries that might need room in the same arrays, prior to the
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* call to sanitize_e820_map() to remove duplicates. The allowance
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* of three memory map entries per node is "enough" entries for
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* the initial hardware platform motivating this mechanism to make
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* use of additional EFI map entries. Future platforms may want
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* to allow more than three entries per node or otherwise refine
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* this size.
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*/
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/*
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* Odd: 'make headers_check' complains about numa.h if I try
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* to collapse the next two #ifdef lines to a single line:
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* #if defined(__KERNEL__) && defined(CONFIG_EFI)
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*/
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#ifdef __KERNEL__
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#ifdef CONFIG_EFI
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#include <linux/numa.h>
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#define E820_X_MAX (E820MAX + 3 * MAX_NUMNODES)
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#else /* ! CONFIG_EFI */
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#define E820_X_MAX E820MAX
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#endif
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#else /* ! __KERNEL__ */
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#define E820_X_MAX E820MAX
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#endif
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#define E820NR 0x1e8 /* # entries in E820MAP */
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#define E820_RAM 1
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#define E820_RESERVED 2
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#define E820_ACPI 3
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#define E820_NVS 4
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#ifndef __ASSEMBLY__
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struct e820entry {
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__u64 addr; /* start of memory segment */
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__u64 size; /* size of memory segment */
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__u32 type; /* type of memory segment */
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} __attribute__((packed));
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struct e820map {
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__u32 nr_map;
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struct e820entry map[E820_X_MAX];
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};
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extern struct e820map e820;
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extern int e820_any_mapped(u64 start, u64 end, unsigned type);
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extern int e820_all_mapped(u64 start, u64 end, unsigned type);
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extern void add_memory_region(u64 start, u64 size, int type);
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extern void e820_print_map(char *who);
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extern int
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sanitize_e820_map(struct e820entry *biosmap, int max_nr_map, int *pnr_map);
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extern int copy_e820_map(struct e820entry *biosmap, int nr_map);
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extern u64 update_memory_range(u64 start, u64 size, unsigned old_type,
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unsigned new_type);
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extern void update_e820(void);
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extern void e820_setup_gap(void);
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#if defined(CONFIG_X86_64) || \
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(defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION))
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extern void e820_mark_nosave_regions(unsigned long limit_pfn);
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#else
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static inline void e820_mark_nosave_regions(unsigned long limit_pfn)
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{
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}
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#endif
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extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align);
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extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align);
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extern void reserve_early(u64 start, u64 end, char *name);
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extern void free_early(u64 start, u64 end);
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extern void early_res_to_bootmem(u64 start, u64 end);
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#endif /* __ASSEMBLY__ */
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#define ISA_START_ADDRESS 0xa0000
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#define ISA_END_ADDRESS 0x100000
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#define BIOS_BEGIN 0x000a0000
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#define BIOS_END 0x00100000
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#ifdef __KERNEL__
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#ifdef CONFIG_X86_32
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# include "e820_32.h"
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#else
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# include "e820_64.h"
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#endif
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#endif /* __KERNEL__ */
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#endif /* __ASM_E820_H */
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