1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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
34 /*
35 * Physical memory system definitions
36 */
37
38 #ifndef _VM_PHYS_H_
39 #define _VM_PHYS_H_
40
41 #ifdef _KERNEL
42
43 #include <vm/_vm_phys.h>
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 int vm_phys_find_range(vm_page_t bounds[], int segind, int domain,
75 u_long npages, vm_paddr_t low, vm_paddr_t high);
76 void vm_phys_free_contig(vm_page_t m, u_long npages);
77 void vm_phys_free_pages(vm_page_t m, int order);
78 void vm_phys_init(void);
79 vm_page_t vm_phys_paddr_to_vm_page(vm_paddr_t pa);
80 void vm_phys_register_domains(int ndomains, struct mem_affinity *affinity,
81 int *locality);
82 bool 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
vm_phys_domain(vm_paddr_t pa __numa_used)92 vm_phys_domain(vm_paddr_t pa __numa_used)
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 /*
110 * Find the segind for the first segment at or after the given physical address.
111 */
112 static inline int
vm_phys_lookup_segind(vm_paddr_t pa)113 vm_phys_lookup_segind(vm_paddr_t pa)
114 {
115 u_int hi, lo, mid;
116
117 lo = 0;
118 hi = vm_phys_nsegs;
119 while (lo != hi) {
120 /*
121 * for i in [0, lo), segs[i].end <= pa
122 * for i in [hi, nsegs), segs[i].end > pa
123 */
124 mid = lo + (hi - lo) / 2;
125 if (vm_phys_segs[mid].end <= pa)
126 lo = mid + 1;
127 else
128 hi = mid;
129 }
130 return (lo);
131 }
132
133 /*
134 * Find the segment corresponding to the given physical address.
135 */
136 static inline struct vm_phys_seg *
vm_phys_paddr_to_seg(vm_paddr_t pa)137 vm_phys_paddr_to_seg(vm_paddr_t pa)
138 {
139 struct vm_phys_seg *seg;
140 int segind;
141
142 segind = vm_phys_lookup_segind(pa);
143 if (segind < vm_phys_nsegs) {
144 seg = &vm_phys_segs[segind];
145 if (pa >= seg->start)
146 return (seg);
147 }
148 return (NULL);
149 }
150
151 #endif /* _KERNEL */
152 #endif /* !_VM_PHYS_H_ */
153