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Virtual memory map was intended to avoid wasting memory on the memory map on systems with large holes in the physical memory layout. Long ago it been superseded first by DISCONTIGMEM and then by SPARSEMEM. Moreover, SPARSEMEM_VMEMMAP provide the same functionality in much more portable way. As the first step to removing the VIRTUAL_MEM_MAP forbid it's usage with FLATMEM and panic on systems with large holes in the physical memory layout that try to run FLATMEM kernels. Link: https://lkml.kernel.org/r/20201101170454.9567-7-rppt@kernel.org Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Matt Turner <mattst88@gmail.com> Cc: Meelis Roos <mroos@linux.ee> Cc: Michael Schmitz <schmitzmic@gmail.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Tony Luck <tony.luck@intel.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
#ifndef meminit_h
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#define meminit_h
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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/*
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* Entries defined so far:
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* - boot param structure itself
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* - memory map
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* - initrd (optional)
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* - command line string
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* - kernel code & data
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* - crash dumping code reserved region
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* - Kernel memory map built from EFI memory map
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* - ELF core header
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*
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* More could be added if necessary
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*/
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#define IA64_MAX_RSVD_REGIONS 9
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struct rsvd_region {
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u64 start; /* virtual address of beginning of element */
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u64 end; /* virtual address of end of element + 1 */
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};
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extern struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1];
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extern int num_rsvd_regions;
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extern void find_memory (void);
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extern void reserve_memory (void);
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extern void find_initrd (void);
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extern int filter_rsvd_memory (u64 start, u64 end, void *arg);
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extern int filter_memory (u64 start, u64 end, void *arg);
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extern unsigned long efi_memmap_init(u64 *s, u64 *e);
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extern int find_max_min_low_pfn (u64, u64, void *);
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extern unsigned long vmcore_find_descriptor_size(unsigned long address);
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extern int reserve_elfcorehdr(u64 *start, u64 *end);
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/*
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* For rounding an address to the next IA64_GRANULE_SIZE or order
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*/
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#define GRANULEROUNDDOWN(n) ((n) & ~(IA64_GRANULE_SIZE-1))
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#define GRANULEROUNDUP(n) (((n)+IA64_GRANULE_SIZE-1) & ~(IA64_GRANULE_SIZE-1))
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#ifdef CONFIG_NUMA
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extern void call_pernode_memory (unsigned long start, unsigned long len, void *func);
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#else
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# define call_pernode_memory(start, len, func) (*func)(start, len, 0)
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#endif
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#define IGNORE_PFN0 1 /* XXX fix me: ignore pfn 0 until TLB miss handler is updated... */
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extern int register_active_ranges(u64 start, u64 len, int nid);
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#ifdef CONFIG_VIRTUAL_MEM_MAP
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extern unsigned long VMALLOC_END;
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extern struct page *vmem_map;
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extern int create_mem_map_page_table(u64 start, u64 end, void *arg);
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extern int vmemmap_find_next_valid_pfn(int, int);
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#else
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static inline int vmemmap_find_next_valid_pfn(int node, int i)
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{
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return i + 1;
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}
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#endif
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#endif /* meminit_h */
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