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a6eaba4d | 1 | /** @file\r |
ee4dc24f RN |
2 | GTDT table parser\r |
3 | \r | |
942c9bd3 | 4 | Copyright (c) 2016 - 2021, ARM Limited. All rights reserved.\r |
56ba3746 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
ee4dc24f RN |
6 | \r |
7 | @par Reference(s):\r | |
942c9bd3 | 8 | - ACPI 6.4 Specification - January 2021\r |
ee4dc24f RN |
9 | **/\r |
10 | \r | |
11 | #include <IndustryStandard/Acpi.h>\r | |
12 | #include <Library/UefiLib.h>\r | |
13 | #include "AcpiParser.h"\r | |
14 | #include "AcpiTableParser.h"\r | |
e18ac66d | 15 | #include "AcpiViewConfig.h"\r |
ee4dc24f | 16 | \r |
2a219e19 KK |
17 | // "The number of GT Block Timers must be less than or equal to 8"\r |
18 | #define GT_BLOCK_TIMER_COUNT_MAX 8\r | |
19 | \r | |
ee4dc24f RN |
20 | // Local variables\r |
21 | STATIC CONST UINT32* GtdtPlatformTimerCount;\r | |
22 | STATIC CONST UINT32* GtdtPlatformTimerOffset;\r | |
23 | STATIC CONST UINT8* PlatformTimerType;\r | |
24 | STATIC CONST UINT16* PlatformTimerLength;\r | |
25 | STATIC CONST UINT32* GtBlockTimerCount;\r | |
26 | STATIC CONST UINT32* GtBlockTimerOffset;\r | |
ee4dc24f RN |
27 | STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;\r |
28 | \r | |
a6eaba4d DB |
29 | /**\r |
30 | This function validates the GT Block timer count.\r | |
ee4dc24f RN |
31 | \r |
32 | @param [in] Ptr Pointer to the start of the field data.\r | |
33 | @param [in] Context Pointer to context specific information e.g. this\r | |
34 | could be a pointer to the ACPI table header.\r | |
a6eaba4d | 35 | **/\r |
ee4dc24f RN |
36 | STATIC\r |
37 | VOID\r | |
38 | EFIAPI\r | |
39 | ValidateGtBlockTimerCount (\r | |
40 | IN UINT8* Ptr,\r | |
41 | IN VOID* Context\r | |
2a219e19 KK |
42 | )\r |
43 | {\r | |
44 | UINT32 BlockTimerCount;\r | |
45 | \r | |
46 | BlockTimerCount = *(UINT32*)Ptr;\r | |
47 | \r | |
48 | if (BlockTimerCount > GT_BLOCK_TIMER_COUNT_MAX) {\r | |
49 | IncrementErrorCount ();\r | |
50 | Print (\r | |
51 | L"\nERROR: Timer Count = %d. Max Timer Count is %d.",\r | |
52 | BlockTimerCount,\r | |
53 | GT_BLOCK_TIMER_COUNT_MAX\r | |
54 | );\r | |
55 | }\r | |
56 | }\r | |
ee4dc24f | 57 | \r |
8da8daaf KK |
58 | /**\r |
59 | This function validates the GT Frame Number.\r | |
60 | \r | |
61 | @param [in] Ptr Pointer to the start of the field data.\r | |
62 | @param [in] Context Pointer to context specific information e.g. this\r | |
63 | could be a pointer to the ACPI table header.\r | |
64 | **/\r | |
65 | STATIC\r | |
66 | VOID\r | |
67 | EFIAPI\r | |
68 | ValidateGtFrameNumber (\r | |
69 | IN UINT8* Ptr,\r | |
70 | IN VOID* Context\r | |
2a219e19 KK |
71 | )\r |
72 | {\r | |
73 | UINT8 FrameNumber;\r | |
74 | \r | |
75 | FrameNumber = *(UINT8*)Ptr;\r | |
76 | \r | |
77 | if (FrameNumber >= GT_BLOCK_TIMER_COUNT_MAX) {\r | |
78 | IncrementErrorCount ();\r | |
79 | Print (\r | |
80 | L"\nERROR: GT Frame Number = %d. GT Frame Number must be in range 0-%d.",\r | |
81 | FrameNumber,\r | |
82 | GT_BLOCK_TIMER_COUNT_MAX - 1\r | |
83 | );\r | |
84 | }\r | |
85 | }\r | |
8da8daaf | 86 | \r |
a6eaba4d DB |
87 | /**\r |
88 | An ACPI_PARSER array describing the ACPI GTDT Table.\r | |
89 | **/\r | |
ee4dc24f RN |
90 | STATIC CONST ACPI_PARSER GtdtParser[] = {\r |
91 | PARSE_ACPI_HEADER (&AcpiHdrInfo),\r | |
92 | {L"CntControlBase Physical Address", 8, 36, L"0x%lx", NULL, NULL,\r | |
93 | NULL, NULL},\r | |
94 | {L"Reserved", 4, 44, L"0x%x", NULL, NULL, NULL, NULL},\r | |
95 | {L"Secure EL1 timer GSIV", 4, 48, L"0x%x", NULL, NULL, NULL, NULL},\r | |
96 | {L"Secure EL1 timer FLAGS", 4, 52, L"0x%x", NULL, NULL, NULL, NULL},\r | |
97 | \r | |
98 | {L"Non-Secure EL1 timer GSIV", 4, 56, L"0x%x", NULL, NULL, NULL, NULL},\r | |
99 | {L"Non-Secure EL1 timer FLAGS", 4, 60, L"0x%x", NULL, NULL, NULL, NULL},\r | |
100 | \r | |
101 | {L"Virtual timer GSIV", 4, 64, L"0x%x", NULL, NULL, NULL, NULL},\r | |
102 | {L"Virtual timer FLAGS", 4, 68, L"0x%x", NULL, NULL, NULL, NULL},\r | |
103 | \r | |
104 | {L"Non-Secure EL2 timer GSIV", 4, 72, L"0x%x", NULL, NULL, NULL, NULL},\r | |
105 | {L"Non-Secure EL2 timer FLAGS", 4, 76, L"0x%x", NULL, NULL, NULL, NULL},\r | |
106 | \r | |
107 | {L"CntReadBase Physical address", 8, 80, L"0x%lx", NULL, NULL, NULL, NULL},\r | |
108 | {L"Platform Timer Count", 4, 88, L"%d", NULL,\r | |
109 | (VOID**)&GtdtPlatformTimerCount, NULL, NULL},\r | |
110 | {L"Platform Timer Offset", 4, 92, L"0x%x", NULL,\r | |
98f98eb4 PG |
111 | (VOID**)&GtdtPlatformTimerOffset, NULL, NULL},\r |
112 | {L"Virtual EL2 Timer GSIV", 4, 96, L"0x%x", NULL, NULL, NULL, NULL},\r | |
113 | {L"Virtual EL2 Timer Flags", 4, 100, L"0x%x", NULL, NULL, NULL, NULL}\r | |
ee4dc24f RN |
114 | };\r |
115 | \r | |
a6eaba4d DB |
116 | /**\r |
117 | An ACPI_PARSER array describing the Platform timer header.\r | |
118 | **/\r | |
ee4dc24f RN |
119 | STATIC CONST ACPI_PARSER GtPlatformTimerHeaderParser[] = {\r |
120 | {L"Type", 1, 0, NULL, NULL, (VOID**)&PlatformTimerType, NULL, NULL},\r | |
121 | {L"Length", 2, 1, NULL, NULL, (VOID**)&PlatformTimerLength, NULL, NULL},\r | |
122 | {L"Reserved", 1, 3, NULL, NULL, NULL, NULL, NULL}\r | |
123 | };\r | |
124 | \r | |
a6eaba4d DB |
125 | /**\r |
126 | An ACPI_PARSER array describing the Platform GT Block.\r | |
127 | **/\r | |
ee4dc24f RN |
128 | STATIC CONST ACPI_PARSER GtBlockParser[] = {\r |
129 | {L"Type", 1, 0, L"%d", NULL, NULL, NULL, NULL},\r | |
1d12f0e6 | 130 | {L"Length", 2, 1, L"%d", NULL, NULL, NULL, NULL},\r |
ee4dc24f RN |
131 | {L"Reserved", 1, 3, L"%x", NULL, NULL, NULL, NULL},\r |
132 | {L"Physical address (CntCtlBase)", 8, 4, L"0x%lx", NULL, NULL, NULL, NULL},\r | |
133 | {L"Timer Count", 4, 12, L"%d", NULL, (VOID**)&GtBlockTimerCount,\r | |
134 | ValidateGtBlockTimerCount, NULL},\r | |
135 | {L"Timer Offset", 4, 16, L"%d", NULL, (VOID**)&GtBlockTimerOffset, NULL,\r | |
136 | NULL}\r | |
137 | };\r | |
138 | \r | |
a6eaba4d DB |
139 | /**\r |
140 | An ACPI_PARSER array describing the GT Block timer.\r | |
141 | **/\r | |
ee4dc24f | 142 | STATIC CONST ACPI_PARSER GtBlockTimerParser[] = {\r |
8da8daaf | 143 | {L"Frame Number", 1, 0, L"%d", NULL, NULL, ValidateGtFrameNumber, NULL},\r |
ee4dc24f RN |
144 | {L"Reserved", 3, 1, L"%x %x %x", Dump3Chars, NULL, NULL, NULL},\r |
145 | {L"Physical address (CntBaseX)", 8, 4, L"0x%lx", NULL, NULL, NULL, NULL},\r | |
146 | {L"Physical address (CntEL0BaseX)", 8, 12, L"0x%lx", NULL, NULL, NULL,\r | |
147 | NULL},\r | |
148 | {L"Physical Timer GSIV", 4, 20, L"0x%x", NULL, NULL, NULL, NULL},\r | |
149 | {L"Physical Timer Flags", 4, 24, L"0x%x", NULL, NULL, NULL, NULL},\r | |
150 | {L"Virtual Timer GSIV", 4, 28, L"0x%x", NULL, NULL, NULL, NULL},\r | |
151 | {L"Virtual Timer Flags", 4, 32, L"0x%x", NULL, NULL, NULL, NULL},\r | |
152 | {L"Common Flags", 4, 36, L"0x%x", NULL, NULL, NULL, NULL}\r | |
153 | };\r | |
154 | \r | |
a6eaba4d DB |
155 | /**\r |
156 | An ACPI_PARSER array describing the Platform Watchdog.\r | |
157 | **/\r | |
942c9bd3 | 158 | STATIC CONST ACPI_PARSER ArmGenericWatchdogParser[] = {\r |
ee4dc24f RN |
159 | {L"Type", 1, 0, L"%d", NULL, NULL, NULL, NULL},\r |
160 | {L"Length", 2, 1, L"%d", NULL, NULL, NULL, NULL},\r | |
161 | {L"Reserved", 1, 3, L"%x", NULL, NULL, NULL, NULL},\r | |
162 | {L"RefreshFrame Physical address", 8, 4, L"0x%lx", NULL, NULL, NULL, NULL},\r | |
163 | {L"ControlFrame Physical address", 8, 12, L"0x%lx", NULL, NULL, NULL, NULL},\r | |
164 | {L"Watchdog Timer GSIV", 4, 20, L"0x%x", NULL, NULL, NULL, NULL},\r | |
165 | {L"Watchdog Timer Flags", 4, 24, L"0x%x", NULL, NULL, NULL, NULL}\r | |
166 | };\r | |
167 | \r | |
a6eaba4d DB |
168 | /**\r |
169 | This function parses the Platform GT Block.\r | |
ee4dc24f | 170 | \r |
1d12f0e6 KK |
171 | @param [in] Ptr Pointer to the start of the GT Block data.\r |
172 | @param [in] Length Length of the GT Block structure.\r | |
a6eaba4d | 173 | **/\r |
ee4dc24f RN |
174 | STATIC\r |
175 | VOID\r | |
176 | DumpGTBlock (\r | |
177 | IN UINT8* Ptr,\r | |
1d12f0e6 | 178 | IN UINT16 Length\r |
ee4dc24f RN |
179 | )\r |
180 | {\r | |
181 | UINT32 Index;\r | |
182 | UINT32 Offset;\r | |
ee4dc24f | 183 | \r |
1d12f0e6 KK |
184 | ParseAcpi (\r |
185 | TRUE,\r | |
186 | 2,\r | |
187 | "GT Block",\r | |
188 | Ptr,\r | |
189 | Length,\r | |
190 | PARSER_PARAMS (GtBlockParser)\r | |
191 | );\r | |
192 | \r | |
214bc6e2 KK |
193 | // Check if the values used to control the parsing logic have been\r |
194 | // successfully read.\r | |
195 | if ((GtBlockTimerCount == NULL) ||\r | |
196 | (GtBlockTimerOffset == NULL)) {\r | |
197 | IncrementErrorCount ();\r | |
198 | Print (\r | |
199 | L"ERROR: Insufficient GT Block Structure length. Length = %d.\n",\r | |
200 | Length\r | |
201 | );\r | |
202 | return;\r | |
203 | }\r | |
204 | \r | |
1d12f0e6 KK |
205 | Offset = *GtBlockTimerOffset;\r |
206 | Index = 0;\r | |
207 | \r | |
208 | // Parse the specified number of GT Block Timer Structures or the GT Block\r | |
209 | // Structure buffer length. Whichever is minimum.\r | |
210 | while ((Index++ < *GtBlockTimerCount) &&\r | |
211 | (Offset < Length)) {\r | |
212 | Offset += ParseAcpi (\r | |
213 | TRUE,\r | |
214 | 2,\r | |
215 | "GT Block Timer",\r | |
216 | Ptr + Offset,\r | |
217 | Length - Offset,\r | |
218 | PARSER_PARAMS (GtBlockTimerParser)\r | |
219 | );\r | |
ee4dc24f RN |
220 | }\r |
221 | }\r | |
222 | \r | |
a6eaba4d DB |
223 | /**\r |
224 | This function parses the Platform Watchdog timer.\r | |
ee4dc24f RN |
225 | \r |
226 | @param [in] Ptr Pointer to the start of the watchdog timer data.\r | |
227 | @param [in] Length Length of the watchdog timer structure.\r | |
a6eaba4d | 228 | **/\r |
ee4dc24f RN |
229 | STATIC\r |
230 | VOID\r | |
231 | DumpWatchdogTimer (\r | |
232 | IN UINT8* Ptr,\r | |
233 | IN UINT16 Length\r | |
234 | )\r | |
235 | {\r | |
236 | ParseAcpi (\r | |
237 | TRUE,\r | |
238 | 2,\r | |
942c9bd3 | 239 | "Arm Generic Watchdog",\r |
ee4dc24f RN |
240 | Ptr,\r |
241 | Length,\r | |
942c9bd3 | 242 | PARSER_PARAMS (ArmGenericWatchdogParser)\r |
ee4dc24f RN |
243 | );\r |
244 | }\r | |
245 | \r | |
a6eaba4d DB |
246 | /**\r |
247 | This function parses the ACPI GTDT table.\r | |
ee4dc24f RN |
248 | When trace is enabled this function parses the GTDT table and\r |
249 | traces the ACPI table fields.\r | |
250 | \r | |
251 | This function also parses the following platform timer structures:\r | |
252 | - GT Block timer\r | |
253 | - Watchdog timer\r | |
254 | \r | |
255 | This function also performs validation of the ACPI table fields.\r | |
256 | \r | |
257 | @param [in] Trace If TRUE, trace the ACPI fields.\r | |
258 | @param [in] Ptr Pointer to the start of the buffer.\r | |
259 | @param [in] AcpiTableLength Length of the ACPI table.\r | |
260 | @param [in] AcpiTableRevision Revision of the ACPI table.\r | |
a6eaba4d | 261 | **/\r |
ee4dc24f RN |
262 | VOID\r |
263 | EFIAPI\r | |
264 | ParseAcpiGtdt (\r | |
265 | IN BOOLEAN Trace,\r | |
266 | IN UINT8* Ptr,\r | |
267 | IN UINT32 AcpiTableLength,\r | |
268 | IN UINT8 AcpiTableRevision\r | |
269 | )\r | |
270 | {\r | |
271 | UINT32 Index;\r | |
1d12f0e6 | 272 | UINT32 Offset;\r |
ee4dc24f RN |
273 | UINT8* TimerPtr;\r |
274 | \r | |
275 | if (!Trace) {\r | |
276 | return;\r | |
277 | }\r | |
278 | \r | |
279 | ParseAcpi (\r | |
280 | TRUE,\r | |
281 | 0,\r | |
282 | "GTDT",\r | |
283 | Ptr,\r | |
284 | AcpiTableLength,\r | |
285 | PARSER_PARAMS (GtdtParser)\r | |
286 | );\r | |
287 | \r | |
214bc6e2 KK |
288 | // Check if the values used to control the parsing logic have been\r |
289 | // successfully read.\r | |
290 | if ((GtdtPlatformTimerCount == NULL) ||\r | |
291 | (GtdtPlatformTimerOffset == NULL)) {\r | |
292 | IncrementErrorCount ();\r | |
293 | Print (\r | |
294 | L"ERROR: Insufficient table length. AcpiTableLength = %d.\n",\r | |
295 | AcpiTableLength\r | |
296 | );\r | |
297 | return;\r | |
298 | }\r | |
299 | \r | |
1d12f0e6 KK |
300 | TimerPtr = Ptr + *GtdtPlatformTimerOffset;\r |
301 | Offset = *GtdtPlatformTimerOffset;\r | |
302 | Index = 0;\r | |
303 | \r | |
304 | // Parse the specified number of Platform Timer Structures or the GTDT\r | |
305 | // buffer length. Whichever is minimum.\r | |
306 | while ((Index++ < *GtdtPlatformTimerCount) &&\r | |
307 | (Offset < AcpiTableLength)) {\r | |
308 | // Parse the Platform Timer Header to obtain Length and Type\r | |
309 | ParseAcpi (\r | |
310 | FALSE,\r | |
311 | 0,\r | |
312 | NULL,\r | |
313 | TimerPtr,\r | |
314 | AcpiTableLength - Offset,\r | |
315 | PARSER_PARAMS (GtPlatformTimerHeaderParser)\r | |
316 | );\r | |
317 | \r | |
214bc6e2 KK |
318 | // Check if the values used to control the parsing logic have been\r |
319 | // successfully read.\r | |
320 | if ((PlatformTimerType == NULL) ||\r | |
321 | (PlatformTimerLength == NULL)) {\r | |
322 | IncrementErrorCount ();\r | |
323 | Print (\r | |
324 | L"ERROR: Insufficient remaining table buffer length to read the " \\r | |
325 | L"Platform Timer Structure header. Length = %d.\n",\r | |
326 | AcpiTableLength - Offset\r | |
327 | );\r | |
328 | return;\r | |
329 | }\r | |
330 | \r | |
b8504826 KK |
331 | // Validate Platform Timer Structure length\r |
332 | if ((*PlatformTimerLength == 0) ||\r | |
333 | ((Offset + (*PlatformTimerLength)) > AcpiTableLength)) {\r | |
1d12f0e6 KK |
334 | IncrementErrorCount ();\r |
335 | Print (\r | |
336 | L"ERROR: Invalid Platform Timer Structure length. " \\r | |
b8504826 | 337 | L"Length = %d. Offset = %d. AcpiTableLength = %d.\n",\r |
1d12f0e6 | 338 | *PlatformTimerLength,\r |
b8504826 KK |
339 | Offset,\r |
340 | AcpiTableLength\r | |
ee4dc24f | 341 | );\r |
1d12f0e6 KK |
342 | return;\r |
343 | }\r | |
344 | \r | |
345 | switch (*PlatformTimerType) {\r | |
942c9bd3 | 346 | case EFI_ACPI_6_4_GTDT_GT_BLOCK:\r |
1d12f0e6 KK |
347 | DumpGTBlock (TimerPtr, *PlatformTimerLength);\r |
348 | break;\r | |
942c9bd3 | 349 | case EFI_ACPI_6_4_GTDT_ARM_GENERIC_WATCHDOG:\r |
1d12f0e6 KK |
350 | DumpWatchdogTimer (TimerPtr, *PlatformTimerLength);\r |
351 | break;\r | |
352 | default:\r | |
353 | IncrementErrorCount ();\r | |
354 | Print (\r | |
355 | L"ERROR: Invalid Platform Timer Type = %d\n",\r | |
356 | *PlatformTimerType\r | |
357 | );\r | |
358 | break;\r | |
359 | } // switch\r | |
360 | \r | |
361 | TimerPtr += *PlatformTimerLength;\r | |
362 | Offset += *PlatformTimerLength;\r | |
363 | } // while\r | |
ee4dc24f | 364 | }\r |