1 /* $OpenBSD: set_memory.h,v 1.5 2023/01/01 01:34:58 jsg Exp $ */
2 /*
3 * Copyright (c) 2013, 2014, 2015 Mark Kettenis
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #ifndef _ASM_SET_MEMORY_H
19 #define _ASM_SET_MEMORY_H
20
21 #include <sys/types.h>
22 #include <sys/systm.h>
23 #include <sys/atomic.h>
24
25 #include <sys/param.h> /* for PAGE_SIZE on i386 */
26 #include <uvm/uvm_extern.h>
27
28 #include <machine/pmap.h>
29
30 #if defined(__amd64__) || defined(__i386__)
31
32 static inline int
set_pages_array_wb(struct vm_page ** pages,int addrinarray)33 set_pages_array_wb(struct vm_page **pages, int addrinarray)
34 {
35 int i;
36
37 for (i = 0; i < addrinarray; i++)
38 atomic_clearbits_int(&pages[i]->pg_flags, PG_PMAP_WC);
39
40 return 0;
41 }
42
43 static inline int
set_pages_array_wc(struct vm_page ** pages,int addrinarray)44 set_pages_array_wc(struct vm_page **pages, int addrinarray)
45 {
46 int i;
47
48 for (i = 0; i < addrinarray; i++)
49 atomic_setbits_int(&pages[i]->pg_flags, PG_PMAP_WC);
50
51 return 0;
52 }
53
54 static inline int
set_pages_array_uc(struct vm_page ** pages,int addrinarray)55 set_pages_array_uc(struct vm_page **pages, int addrinarray)
56 {
57 /* XXX */
58 return 0;
59 }
60
61 static inline int
set_pages_wb(struct vm_page * page,int numpages)62 set_pages_wb(struct vm_page *page, int numpages)
63 {
64 struct vm_page *pg;
65 paddr_t start = VM_PAGE_TO_PHYS(page);
66 int i;
67
68 for (i = 0; i < numpages; i++) {
69 pg = PHYS_TO_VM_PAGE(start + (i * PAGE_SIZE));
70 if (pg != NULL)
71 atomic_clearbits_int(&pg->pg_flags, PG_PMAP_WC);
72 }
73
74 return 0;
75 }
76
77 static inline int
set_pages_uc(struct vm_page * page,int numpages)78 set_pages_uc(struct vm_page *page, int numpages)
79 {
80 /* XXX */
81 return 0;
82 }
83
84 #endif /* defined(__amd64__) || defined(__i386__) */
85
86 #endif
87