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acpica-unix2-20130823
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--- old/usr/src/uts/intel/io/acpica/tables/tbxfroot.c
+++ new/usr/src/common/acpica/components/tables/tbxfroot.c
1 1 /******************************************************************************
2 2 *
3 3 * Module Name: tbxfroot - Find the root ACPI table (RSDT)
4 4 *
5 5 *****************************************************************************/
6 6
7 7 /*
8 - * Copyright (C) 2000 - 2011, Intel Corp.
8 + * Copyright (C) 2000 - 2013, Intel Corp.
9 9 * All rights reserved.
10 10 *
11 11 * Redistribution and use in source and binary forms, with or without
12 12 * modification, are permitted provided that the following conditions
13 13 * are met:
14 14 * 1. Redistributions of source code must retain the above copyright
15 15 * notice, this list of conditions, and the following disclaimer,
16 16 * without modification.
17 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 18 * substantially similar to the "NO WARRANTY" disclaimer below
19 19 * ("Disclaimer") and any redistribution must be conditioned upon
20 20 * including a substantially similar Disclaimer requirement for further
21 21 * binary redistribution.
22 22 * 3. Neither the names of the above-listed copyright holders nor the names
23 23 * of any contributors may be used to endorse or promote products derived
24 24 * from this software without specific prior written permission.
25 25 *
26 26 * Alternatively, this software may be distributed under the terms of the
27 27 * GNU General Public License ("GPL") version 2 as published by the Free
28 28 * Software Foundation.
29 29 *
30 30 * NO WARRANTY
31 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 41 * POSSIBILITY OF SUCH DAMAGES.
42 42 */
43 43
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44 44 #define __TBXFROOT_C__
45 45
46 46 #include "acpi.h"
47 47 #include "accommon.h"
48 48 #include "actables.h"
49 49
50 50
51 51 #define _COMPONENT ACPI_TABLES
52 52 ACPI_MODULE_NAME ("tbxfroot")
53 53
54 -/* Local prototypes */
55 54
56 -static UINT8 *
57 -AcpiTbScanMemoryForRsdp (
58 - UINT8 *StartAddress,
59 - UINT32 Length);
60 -
61 -static ACPI_STATUS
62 -AcpiTbValidateRsdp (
63 - ACPI_TABLE_RSDP *Rsdp);
64 -
65 -
66 55 /*******************************************************************************
67 56 *
68 57 * FUNCTION: AcpiTbValidateRsdp
69 58 *
70 59 * PARAMETERS: Rsdp - Pointer to unvalidated RSDP
71 60 *
72 61 * RETURN: Status
73 62 *
74 63 * DESCRIPTION: Validate the RSDP (ptr)
75 64 *
76 65 ******************************************************************************/
77 66
78 -static ACPI_STATUS
67 +ACPI_STATUS
79 68 AcpiTbValidateRsdp (
80 69 ACPI_TABLE_RSDP *Rsdp)
81 70 {
82 - ACPI_FUNCTION_ENTRY ();
83 71
84 -
85 72 /*
86 73 * The signature and checksum must both be correct
87 74 *
88 75 * Note: Sometimes there exists more than one RSDP in memory; the valid
89 76 * RSDP has a valid checksum, all others have an invalid checksum.
90 77 */
91 - if (ACPI_STRNCMP ((char *) Rsdp, ACPI_SIG_RSDP,
92 - sizeof (ACPI_SIG_RSDP)-1) != 0)
78 + if (!ACPI_VALIDATE_RSDP_SIG (Rsdp->Signature))
93 79 {
94 80 /* Nope, BAD Signature */
95 81
96 82 return (AE_BAD_SIGNATURE);
97 83 }
98 84
99 85 /* Check the standard checksum */
100 86
101 87 if (AcpiTbChecksum ((UINT8 *) Rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0)
102 88 {
103 89 return (AE_BAD_CHECKSUM);
104 90 }
105 91
106 92 /* Check extended checksum if table version >= 2 */
107 93
108 94 if ((Rsdp->Revision >= 2) &&
109 95 (AcpiTbChecksum ((UINT8 *) Rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0))
110 96 {
111 97 return (AE_BAD_CHECKSUM);
112 98 }
113 99
114 100 return (AE_OK);
115 101 }
116 102
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117 103
118 104 /*******************************************************************************
119 105 *
120 106 * FUNCTION: AcpiFindRootPointer
121 107 *
122 108 * PARAMETERS: TableAddress - Where the table pointer is returned
123 109 *
124 110 * RETURN: Status, RSDP physical address
125 111 *
126 112 * DESCRIPTION: Search lower 1Mbyte of memory for the root system descriptor
127 - * pointer structure. If it is found, set *RSDP to point to it.
113 + * pointer structure. If it is found, set *RSDP to point to it.
128 114 *
129 115 * NOTE1: The RSDP must be either in the first 1K of the Extended
130 116 * BIOS Data Area or between E0000 and FFFFF (From ACPI Spec.)
131 117 * Only a 32-bit physical address is necessary.
132 118 *
133 119 * NOTE2: This function is always available, regardless of the
134 120 * initialization state of the rest of ACPI.
135 121 *
136 122 ******************************************************************************/
137 123
138 124 ACPI_STATUS
139 125 AcpiFindRootPointer (
140 126 ACPI_SIZE *TableAddress)
141 127 {
142 128 UINT8 *TablePtr;
143 129 UINT8 *MemRover;
144 130 UINT32 PhysicalAddress;
145 131
146 132
147 133 ACPI_FUNCTION_TRACE (AcpiFindRootPointer);
148 134
149 135
150 136 /* 1a) Get the location of the Extended BIOS Data Area (EBDA) */
151 137
152 138 TablePtr = AcpiOsMapMemory (
153 139 (ACPI_PHYSICAL_ADDRESS) ACPI_EBDA_PTR_LOCATION,
154 140 ACPI_EBDA_PTR_LENGTH);
155 141 if (!TablePtr)
156 142 {
157 143 ACPI_ERROR ((AE_INFO,
158 144 "Could not map memory at 0x%8.8X for length %u",
159 145 ACPI_EBDA_PTR_LOCATION, ACPI_EBDA_PTR_LENGTH));
160 146
161 147 return_ACPI_STATUS (AE_NO_MEMORY);
162 148 }
163 149
164 150 ACPI_MOVE_16_TO_32 (&PhysicalAddress, TablePtr);
165 151
166 152 /* Convert segment part to physical address */
167 153
168 154 PhysicalAddress <<= 4;
169 155 AcpiOsUnmapMemory (TablePtr, ACPI_EBDA_PTR_LENGTH);
170 156
171 157 /* EBDA present? */
172 158
173 159 if (PhysicalAddress > 0x400)
174 160 {
175 161 /*
176 162 * 1b) Search EBDA paragraphs (EBDA is required to be a
177 163 * minimum of 1K length)
178 164 */
179 165 TablePtr = AcpiOsMapMemory (
180 166 (ACPI_PHYSICAL_ADDRESS) PhysicalAddress,
181 167 ACPI_EBDA_WINDOW_SIZE);
182 168 if (!TablePtr)
183 169 {
184 170 ACPI_ERROR ((AE_INFO,
185 171 "Could not map memory at 0x%8.8X for length %u",
186 172 PhysicalAddress, ACPI_EBDA_WINDOW_SIZE));
187 173
188 174 return_ACPI_STATUS (AE_NO_MEMORY);
189 175 }
190 176
191 177 MemRover = AcpiTbScanMemoryForRsdp (TablePtr, ACPI_EBDA_WINDOW_SIZE);
192 178 AcpiOsUnmapMemory (TablePtr, ACPI_EBDA_WINDOW_SIZE);
193 179
194 180 if (MemRover)
195 181 {
196 182 /* Return the physical address */
197 183
198 184 PhysicalAddress += (UINT32) ACPI_PTR_DIFF (MemRover, TablePtr);
199 185
200 186 *TableAddress = PhysicalAddress;
201 187 return_ACPI_STATUS (AE_OK);
202 188 }
203 189 }
204 190
205 191 /*
206 192 * 2) Search upper memory: 16-byte boundaries in E0000h-FFFFFh
207 193 */
208 194 TablePtr = AcpiOsMapMemory (
209 195 (ACPI_PHYSICAL_ADDRESS) ACPI_HI_RSDP_WINDOW_BASE,
210 196 ACPI_HI_RSDP_WINDOW_SIZE);
211 197
212 198 if (!TablePtr)
213 199 {
214 200 ACPI_ERROR ((AE_INFO,
215 201 "Could not map memory at 0x%8.8X for length %u",
216 202 ACPI_HI_RSDP_WINDOW_BASE, ACPI_HI_RSDP_WINDOW_SIZE));
217 203
218 204 return_ACPI_STATUS (AE_NO_MEMORY);
219 205 }
220 206
221 207 MemRover = AcpiTbScanMemoryForRsdp (TablePtr, ACPI_HI_RSDP_WINDOW_SIZE);
222 208 AcpiOsUnmapMemory (TablePtr, ACPI_HI_RSDP_WINDOW_SIZE);
223 209
224 210 if (MemRover)
225 211 {
226 212 /* Return the physical address */
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227 213
228 214 PhysicalAddress = (UINT32)
229 215 (ACPI_HI_RSDP_WINDOW_BASE + ACPI_PTR_DIFF (MemRover, TablePtr));
230 216
231 217 *TableAddress = PhysicalAddress;
232 218 return_ACPI_STATUS (AE_OK);
233 219 }
234 220
235 221 /* A valid RSDP was not found */
236 222
237 - ACPI_ERROR ((AE_INFO, "A valid RSDP was not found"));
223 + ACPI_BIOS_ERROR ((AE_INFO, "A valid RSDP was not found"));
238 224 return_ACPI_STATUS (AE_NOT_FOUND);
239 225 }
240 226
241 227 ACPI_EXPORT_SYMBOL (AcpiFindRootPointer)
242 228
243 229
244 230 /*******************************************************************************
245 231 *
246 232 * FUNCTION: AcpiTbScanMemoryForRsdp
247 233 *
248 234 * PARAMETERS: StartAddress - Starting pointer for search
249 235 * Length - Maximum length to search
250 236 *
251 237 * RETURN: Pointer to the RSDP if found, otherwise NULL.
252 238 *
253 239 * DESCRIPTION: Search a block of memory for the RSDP signature
254 240 *
255 241 ******************************************************************************/
256 242
257 -static UINT8 *
243 +UINT8 *
258 244 AcpiTbScanMemoryForRsdp (
259 245 UINT8 *StartAddress,
260 246 UINT32 Length)
261 247 {
262 248 ACPI_STATUS Status;
263 249 UINT8 *MemRover;
264 250 UINT8 *EndAddress;
265 251
266 252
267 253 ACPI_FUNCTION_TRACE (TbScanMemoryForRsdp);
268 254
269 255
270 256 EndAddress = StartAddress + Length;
271 257
272 258 /* Search from given start address for the requested length */
273 259
274 260 for (MemRover = StartAddress; MemRover < EndAddress;
275 261 MemRover += ACPI_RSDP_SCAN_STEP)
276 262 {
277 263 /* The RSDP signature and checksum must both be correct */
278 264
279 265 Status = AcpiTbValidateRsdp (ACPI_CAST_PTR (ACPI_TABLE_RSDP, MemRover));
280 266 if (ACPI_SUCCESS (Status))
281 267 {
282 268 /* Sig and checksum valid, we have found a real RSDP */
283 269
284 270 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
285 271 "RSDP located at physical address %p\n", MemRover));
286 272 return_PTR (MemRover);
287 273 }
288 274
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289 275 /* No sig match or bad checksum, keep searching */
290 276 }
291 277
292 278 /* Searched entire block, no RSDP was found */
293 279
294 280 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
295 281 "Searched entire block from %p, valid RSDP was not found\n",
296 282 StartAddress));
297 283 return_PTR (NULL);
298 284 }
299 -
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