The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/vm/vm_phys.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2002-2006 Rice University
    5  * Copyright (c) 2007 Alan L. Cox <alc@cs.rice.edu>
    6  * All rights reserved.
    7  *
    8  * This software was developed for the FreeBSD Project by Alan L. Cox,
    9  * Olivier Crameri, Peter Druschel, Sitaram Iyer, and Juan Navarro.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   23  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
   24  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   27  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   28  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
   30  * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   31  * POSSIBILITY OF SUCH DAMAGE.
   32  *
   33  * $FreeBSD$
   34  */
   35 
   36 /*
   37  *      Physical memory system definitions
   38  */
   39 
   40 #ifndef _VM_PHYS_H_
   41 #define _VM_PHYS_H_
   42 
   43 #ifdef _KERNEL
   44 
   45 extern vm_paddr_t phys_avail[];
   46 
   47 /* Domains must be dense (non-sparse) and zero-based. */
   48 struct mem_affinity {
   49         vm_paddr_t start;
   50         vm_paddr_t end;
   51         int domain;
   52 };
   53 #ifdef NUMA
   54 extern struct mem_affinity *mem_affinity;
   55 extern int *mem_locality;
   56 #endif
   57 
   58 /*
   59  * The following functions are only to be used by the virtual memory system.
   60  */
   61 void vm_phys_add_seg(vm_paddr_t start, vm_paddr_t end);
   62 vm_page_t vm_phys_alloc_contig(int domain, u_long npages, vm_paddr_t low,
   63     vm_paddr_t high, u_long alignment, vm_paddr_t boundary);
   64 vm_page_t vm_phys_alloc_freelist_pages(int domain, int freelist, int pool,
   65     int order);
   66 int vm_phys_alloc_npages(int domain, int pool, int npages, vm_page_t ma[]);
   67 vm_page_t vm_phys_alloc_pages(int domain, int pool, int order);
   68 int vm_phys_domain_match(int prefer, vm_paddr_t low, vm_paddr_t high);
   69 void vm_phys_enqueue_contig(vm_page_t m, u_long npages);
   70 int vm_phys_fictitious_reg_range(vm_paddr_t start, vm_paddr_t end,
   71     vm_memattr_t memattr);
   72 void vm_phys_fictitious_unreg_range(vm_paddr_t start, vm_paddr_t end);
   73 vm_page_t vm_phys_fictitious_to_vm_page(vm_paddr_t pa);
   74 void vm_phys_free_contig(vm_page_t m, u_long npages);
   75 void vm_phys_free_pages(vm_page_t m, int order);
   76 void vm_phys_init(void);
   77 vm_page_t vm_phys_paddr_to_vm_page(vm_paddr_t pa);
   78 void vm_phys_register_domains(int ndomains, struct mem_affinity *affinity,
   79     int *locality);
   80 vm_page_t vm_phys_scan_contig(int domain, u_long npages, vm_paddr_t low,
   81     vm_paddr_t high, u_long alignment, vm_paddr_t boundary, int options);
   82 boolean_t vm_phys_unfree_page(vm_page_t m);
   83 int vm_phys_mem_affinity(int f, int t);
   84 void vm_phys_early_add_seg(vm_paddr_t start, vm_paddr_t end);
   85 vm_paddr_t vm_phys_early_alloc(int domain, size_t alloc_size);
   86 void vm_phys_early_startup(void);
   87 int vm_phys_avail_largest(void);
   88 vm_paddr_t vm_phys_avail_size(int i);
   89 bool vm_phys_is_dumpable(vm_paddr_t pa);
   90 
   91 static inline int
   92 vm_phys_domain(vm_paddr_t pa)
   93 {
   94 #ifdef NUMA
   95         int i;
   96 
   97         if (vm_ndomains == 1)
   98                 return (0);
   99         for (i = 0; mem_affinity[i].end != 0; i++)
  100                 if (mem_affinity[i].start <= pa &&
  101                     mem_affinity[i].end >= pa)
  102                         return (mem_affinity[i].domain);
  103         return (-1);
  104 #else
  105         return (0);
  106 #endif
  107 }
  108 
  109 #endif  /* _KERNEL */
  110 #endif  /* !_VM_PHYS_H_ */

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