mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-09-01 15:14:52 +00:00
efe659ac01
E820_TYPE_RESERVED_KERN is a relict from the ancient history that was used
to early reserve setup_data, see:
28bb223795 ("x86: move reserve_setup_data to setup.c")
Nowadays setup_data is anyway reserved in memblock and there is no point in
carrying E820_TYPE_RESERVED_KERN that behaves exactly like E820_TYPE_RAM
but only complicates the code.
A bonus for removing E820_TYPE_RESERVED_KERN is a small but measurable
speedup of 20 microseconds in init_mem_mappings() on a VM with 32GB or RAM.
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20250214090651.3331663-5-rppt@kernel.org
56 lines
2.0 KiB
C
56 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_E820_API_H
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#define _ASM_E820_API_H
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#include <asm/e820/types.h>
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extern struct e820_table *e820_table;
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extern struct e820_table *e820_table_kexec;
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extern struct e820_table *e820_table_firmware;
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extern unsigned long pci_mem_start;
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extern bool e820__mapped_raw_any(u64 start, u64 end, enum e820_type type);
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extern bool e820__mapped_any(u64 start, u64 end, enum e820_type type);
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extern bool e820__mapped_all(u64 start, u64 end, enum e820_type type);
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extern void e820__range_add (u64 start, u64 size, enum e820_type type);
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extern u64 e820__range_update(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type);
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extern u64 e820__range_remove(u64 start, u64 size, enum e820_type old_type, bool check_type);
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extern u64 e820__range_update_table(struct e820_table *t, u64 start, u64 size, enum e820_type old_type, enum e820_type new_type);
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extern void e820__print_table(char *who);
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extern int e820__update_table(struct e820_table *table);
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extern void e820__update_table_print(void);
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extern unsigned long e820__end_of_ram_pfn(void);
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extern unsigned long e820__end_of_low_ram_pfn(void);
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extern u64 e820__memblock_alloc_reserved(u64 size, u64 align);
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extern void e820__memblock_setup(void);
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extern void e820__finish_early_params(void);
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extern void e820__reserve_resources(void);
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extern void e820__reserve_resources_late(void);
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extern void e820__memory_setup(void);
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extern void e820__memory_setup_extended(u64 phys_addr, u32 data_len);
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extern char *e820__memory_setup_default(void);
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extern void e820__setup_pci_gap(void);
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extern void e820__reallocate_tables(void);
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extern void e820__register_nosave_regions(unsigned long limit_pfn);
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extern int e820__get_entry_type(u64 start, u64 end);
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/*
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* Returns true iff the specified range [start,end) is completely contained inside
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* the ISA region.
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*/
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static inline bool is_ISA_range(u64 start, u64 end)
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{
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return start >= ISA_START_ADDRESS && end <= ISA_END_ADDRESS;
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}
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#endif /* _ASM_E820_API_H */
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