1 /******************************************************************************
2 *
3 * Module Name: osunixmap - Unix OSL for file mappings
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2023, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 #include "acpidump.h"
153 #include <unistd.h>
154 #include <sys/mman.h>
155 #ifdef _FreeBSD
156 #include <sys/param.h>
157 #endif
158
159 #define _COMPONENT ACPI_OS_SERVICES
160 ACPI_MODULE_NAME ("osunixmap")
161
162
163 #ifndef O_BINARY
164 #define O_BINARY 0
165 #endif
166
167 #if defined(_DragonFly) || defined(_FreeBSD) || defined(_QNX)
168 #define MMAP_FLAGS MAP_SHARED
169 #else
170 #define MMAP_FLAGS MAP_PRIVATE
171 #endif
172
173 #define SYSTEM_MEMORY "/dev/mem"
174
175
176 /*******************************************************************************
177 *
178 * FUNCTION: AcpiOsGetPageSize
179 *
180 * PARAMETERS: None
181 *
182 * RETURN: Page size of the platform.
183 *
184 * DESCRIPTION: Obtain page size of the platform.
185 *
186 ******************************************************************************/
187
188 static ACPI_SIZE
AcpiOsGetPageSize(void)189 AcpiOsGetPageSize (
190 void)
191 {
192
193 #ifdef PAGE_SIZE
194 return PAGE_SIZE;
195 #else
196 return sysconf (_SC_PAGESIZE);
197 #endif
198 }
199
200
201 /******************************************************************************
202 *
203 * FUNCTION: AcpiOsMapMemory
204 *
205 * PARAMETERS: Where - Physical address of memory to be mapped
206 * Length - How much memory to map
207 *
208 * RETURN: Pointer to mapped memory. Null on error.
209 *
210 * DESCRIPTION: Map physical memory into local address space.
211 *
212 *****************************************************************************/
213
214 void *
AcpiOsMapMemory(ACPI_PHYSICAL_ADDRESS Where,ACPI_SIZE Length)215 AcpiOsMapMemory (
216 ACPI_PHYSICAL_ADDRESS Where,
217 ACPI_SIZE Length)
218 {
219 UINT8 *MappedMemory;
220 ACPI_PHYSICAL_ADDRESS Offset;
221 ACPI_SIZE PageSize;
222 int fd;
223
224
225 fd = open (SYSTEM_MEMORY, O_RDONLY | O_BINARY);
226 if (fd < 0)
227 {
228 fprintf (stderr, "Cannot open %s\n", SYSTEM_MEMORY);
229 return (NULL);
230 }
231
232 /* Align the offset to use mmap */
233
234 PageSize = AcpiOsGetPageSize ();
235 Offset = Where % PageSize;
236
237 /* Map the table header to get the length of the full table */
238
239 MappedMemory = mmap (NULL, (Length + Offset), PROT_READ, MMAP_FLAGS,
240 fd, (Where - Offset));
241 if (MappedMemory == MAP_FAILED)
242 {
243 fprintf (stderr, "Cannot map %s\n", SYSTEM_MEMORY);
244 close (fd);
245 return (NULL);
246 }
247
248 close (fd);
249 return (ACPI_CAST8 (MappedMemory + Offset));
250 }
251
252
253 /******************************************************************************
254 *
255 * FUNCTION: AcpiOsUnmapMemory
256 *
257 * PARAMETERS: Where - Logical address of memory to be unmapped
258 * Length - How much memory to unmap
259 *
260 * RETURN: None.
261 *
262 * DESCRIPTION: Delete a previously created mapping. Where and Length must
263 * correspond to a previous mapping exactly.
264 *
265 *****************************************************************************/
266
267 void
AcpiOsUnmapMemory(void * Where,ACPI_SIZE Length)268 AcpiOsUnmapMemory (
269 void *Where,
270 ACPI_SIZE Length)
271 {
272 ACPI_PHYSICAL_ADDRESS Offset;
273 ACPI_SIZE PageSize;
274
275
276 PageSize = AcpiOsGetPageSize ();
277 Offset = ACPI_TO_INTEGER (Where) % PageSize;
278 munmap ((UINT8 *) Where - Offset, (Length + Offset));
279 }
280
