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397bdc99 OM |
1 | /** @file\r |
2 | *\r | |
301402fa | 3 | * Copyright (c) 2011-2018, ARM Limited. All rights reserved.\r |
397bdc99 OM |
4 | *\r |
5 | * This program and the accompanying materials\r | |
6 | * are licensed and made available under the terms and conditions of the BSD License\r | |
7 | * which accompanies this distribution. The full text of the license may be found at\r | |
8 | * http://opensource.org/licenses/bsd-license.php\r | |
9 | *\r | |
10 | * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | *\r | |
13 | **/\r | |
14 | \r | |
60775c51 | 15 | #include <Base.h>\r |
397bdc99 | 16 | #include <Library/ArmGicLib.h>\r |
8705cb38 | 17 | #include <Library/ArmLib.h>\r |
1b0ac0de | 18 | #include <Library/DebugLib.h>\r |
60775c51 | 19 | #include <Library/IoLib.h>\r |
8705cb38 | 20 | #include <Library/PcdLib.h>\r |
397bdc99 | 21 | \r |
301402fa SM |
22 | // In GICv3, there are 2 x 64KB frames:\r |
23 | // Redistributor control frame + SGI Control & Generation frame\r | |
24 | #define GIC_V3_REDISTRIBUTOR_GRANULARITY (ARM_GICR_CTLR_FRAME_SIZE \\r | |
25 | + ARM_GICR_SGI_PPI_FRAME_SIZE)\r | |
26 | \r | |
27 | // In GICv4, there are 2 additional 64KB frames:\r | |
28 | // VLPI frame + Reserved page frame\r | |
29 | #define GIC_V4_REDISTRIBUTOR_GRANULARITY (GIC_V3_REDISTRIBUTOR_GRANULARITY \\r | |
30 | + ARM_GICR_SGI_VLPI_FRAME_SIZE \\r | |
31 | + ARM_GICR_SGI_RESERVED_FRAME_SIZE)\r | |
b0393756 EL |
32 | \r |
33 | #define ISENABLER_ADDRESS(base,offset) ((base) + \\r | |
34 | ARM_GICR_CTLR_FRAME_SIZE + ARM_GICR_ISENABLER + (4 * offset))\r | |
35 | \r | |
36 | #define ICENABLER_ADDRESS(base,offset) ((base) + \\r | |
37 | ARM_GICR_CTLR_FRAME_SIZE + ARM_GICR_ICENABLER + (4 * offset))\r | |
38 | \r | |
28f8d28f AB |
39 | /**\r |
40 | *\r | |
41 | * Return whether the Source interrupt index refers to a shared interrupt (SPI)\r | |
42 | */\r | |
43 | STATIC\r | |
44 | BOOLEAN\r | |
45 | SourceIsSpi (\r | |
46 | IN UINTN Source\r | |
47 | )\r | |
48 | {\r | |
49 | return Source >= 32 && Source < 1020;\r | |
50 | }\r | |
51 | \r | |
8705cb38 OM |
52 | /**\r |
53 | * Return the base address of the GIC redistributor for the current CPU\r | |
54 | *\r | |
55 | * @param Revision GIC Revision. The GIC redistributor might have a different\r | |
56 | * granularity following the GIC revision.\r | |
57 | *\r | |
58 | * @retval Base address of the associated GIC Redistributor\r | |
59 | */\r | |
60 | STATIC\r | |
61 | UINTN\r | |
62 | GicGetCpuRedistributorBase (\r | |
63 | IN UINTN GicRedistributorBase,\r | |
64 | IN ARM_GIC_ARCH_REVISION Revision\r | |
65 | )\r | |
66 | {\r | |
8705cb38 OM |
67 | UINTN MpId;\r |
68 | UINTN CpuAffinity;\r | |
69 | UINTN Affinity;\r | |
8705cb38 | 70 | UINTN GicCpuRedistributorBase;\r |
301402fa | 71 | UINT64 TypeRegister;\r |
8705cb38 OM |
72 | \r |
73 | MpId = ArmReadMpidr ();\r | |
b0393756 EL |
74 | // Define CPU affinity as:\r |
75 | // Affinity0[0:8], Affinity1[9:15], Affinity2[16:23], Affinity3[24:32]\r | |
8705cb38 | 76 | // whereas Affinity3 is defined at [32:39] in MPIDR\r |
b0393756 EL |
77 | CpuAffinity = (MpId & (ARM_CORE_AFF0 | ARM_CORE_AFF1 | ARM_CORE_AFF2)) |\r |
78 | ((MpId & ARM_CORE_AFF3) >> 8);\r | |
8705cb38 | 79 | \r |
301402fa | 80 | if (Revision < ARM_GIC_ARCH_REVISION_3) {\r |
8705cb38 OM |
81 | ASSERT_EFI_ERROR (EFI_UNSUPPORTED);\r |
82 | return 0;\r | |
83 | }\r | |
84 | \r | |
85 | GicCpuRedistributorBase = GicRedistributorBase;\r | |
86 | \r | |
301402fa SM |
87 | do {\r |
88 | TypeRegister = MmioRead64 (GicCpuRedistributorBase + ARM_GICR_TYPER);\r | |
89 | Affinity = ARM_GICR_TYPER_GET_AFFINITY (TypeRegister);\r | |
8705cb38 OM |
90 | if (Affinity == CpuAffinity) {\r |
91 | return GicCpuRedistributorBase;\r | |
92 | }\r | |
93 | \r | |
301402fa SM |
94 | // Move to the next GIC Redistributor frame.\r |
95 | // The GIC specification does not forbid a mixture of redistributors\r | |
96 | // with or without support for virtual LPIs, so we test Virtual LPIs\r | |
97 | // Support (VLPIS) bit for each frame to decide the granularity.\r | |
98 | // Note: The assumption here is that the redistributors are adjacent\r | |
99 | // for all CPUs. However this may not be the case for NUMA systems.\r | |
100 | GicCpuRedistributorBase += (((ARM_GICR_TYPER_VLPIS & TypeRegister) != 0)\r | |
101 | ? GIC_V4_REDISTRIBUTOR_GRANULARITY\r | |
102 | : GIC_V3_REDISTRIBUTOR_GRANULARITY);\r | |
103 | } while ((TypeRegister & ARM_GICR_TYPER_LAST) == 0);\r | |
8705cb38 OM |
104 | \r |
105 | // The Redistributor has not been found for the current CPU\r | |
106 | ASSERT_EFI_ERROR (EFI_NOT_FOUND);\r | |
107 | return 0;\r | |
108 | }\r | |
109 | \r | |
397bdc99 OM |
110 | UINTN\r |
111 | EFIAPI\r | |
112 | ArmGicGetInterfaceIdentification (\r | |
113 | IN INTN GicInterruptInterfaceBase\r | |
114 | )\r | |
115 | {\r | |
116 | // Read the GIC Identification Register\r | |
117 | return MmioRead32 (GicInterruptInterfaceBase + ARM_GIC_ICCIIDR);\r | |
118 | }\r | |
119 | \r | |
120 | UINTN\r | |
121 | EFIAPI\r | |
122 | ArmGicGetMaxNumInterrupts (\r | |
123 | IN INTN GicDistributorBase\r | |
124 | )\r | |
125 | {\r | |
126 | return 32 * ((MmioRead32 (GicDistributorBase + ARM_GIC_ICDICTR) & 0x1F) + 1);\r | |
127 | }\r | |
128 | \r | |
129 | VOID\r | |
130 | EFIAPI\r | |
131 | ArmGicSendSgiTo (\r | |
132 | IN INTN GicDistributorBase,\r | |
133 | IN INTN TargetListFilter,\r | |
134 | IN INTN CPUTargetList,\r | |
135 | IN INTN SgiId\r | |
136 | )\r | |
137 | {\r | |
b0393756 EL |
138 | MmioWrite32 (\r |
139 | GicDistributorBase + ARM_GIC_ICDSGIR,\r | |
140 | ((TargetListFilter & 0x3) << 24) | ((CPUTargetList & 0xFF) << 16) | SgiId\r | |
141 | );\r | |
397bdc99 OM |
142 | }\r |
143 | \r | |
1b0ac0de OM |
144 | /*\r |
145 | * Acknowledge and return the value of the Interrupt Acknowledge Register\r | |
146 | *\r | |
147 | * InterruptId is returned separately from the register value because in\r | |
148 | * the GICv2 the register value contains the CpuId and InterruptId while\r | |
149 | * in the GICv3 the register value is only the InterruptId.\r | |
150 | *\r | |
151 | * @param GicInterruptInterfaceBase Base Address of the GIC CPU Interface\r | |
b0393756 EL |
152 | * @param InterruptId InterruptId read from the Interrupt\r |
153 | * Acknowledge Register\r | |
1b0ac0de OM |
154 | *\r |
155 | * @retval value returned by the Interrupt Acknowledge Register\r | |
156 | *\r | |
157 | */\r | |
397bdc99 OM |
158 | UINTN\r |
159 | EFIAPI\r | |
160 | ArmGicAcknowledgeInterrupt (\r | |
1b0ac0de OM |
161 | IN UINTN GicInterruptInterfaceBase,\r |
162 | OUT UINTN *InterruptId\r | |
397bdc99 OM |
163 | )\r |
164 | {\r | |
1b0ac0de | 165 | UINTN Value;\r |
d5c6b7fc OM |
166 | ARM_GIC_ARCH_REVISION Revision;\r |
167 | \r | |
168 | Revision = ArmGicGetSupportedArchRevision ();\r | |
169 | if (Revision == ARM_GIC_ARCH_REVISION_2) {\r | |
170 | Value = ArmGicV2AcknowledgeInterrupt (GicInterruptInterfaceBase);\r | |
171 | // InterruptId is required for the caller to know if a valid or spurious\r | |
172 | // interrupt has been read\r | |
173 | ASSERT (InterruptId != NULL);\r | |
174 | if (InterruptId != NULL) {\r | |
175 | *InterruptId = Value & ARM_GIC_ICCIAR_ACKINTID;\r | |
176 | }\r | |
d7133859 OM |
177 | } else if (Revision == ARM_GIC_ARCH_REVISION_3) {\r |
178 | Value = ArmGicV3AcknowledgeInterrupt ();\r | |
d5c6b7fc OM |
179 | } else {\r |
180 | ASSERT_EFI_ERROR (EFI_UNSUPPORTED);\r | |
181 | // Report Spurious interrupt which is what the above controllers would\r | |
182 | // return if no interrupt was available\r | |
183 | Value = 1023;\r | |
1b0ac0de OM |
184 | }\r |
185 | \r | |
186 | return Value;\r | |
397bdc99 OM |
187 | }\r |
188 | \r | |
189 | VOID\r | |
190 | EFIAPI\r | |
191 | ArmGicEndOfInterrupt (\r | |
192 | IN UINTN GicInterruptInterfaceBase,\r | |
193 | IN UINTN Source\r | |
194 | )\r | |
195 | {\r | |
d5c6b7fc OM |
196 | ARM_GIC_ARCH_REVISION Revision;\r |
197 | \r | |
198 | Revision = ArmGicGetSupportedArchRevision ();\r | |
199 | if (Revision == ARM_GIC_ARCH_REVISION_2) {\r | |
200 | ArmGicV2EndOfInterrupt (GicInterruptInterfaceBase, Source);\r | |
d7133859 OM |
201 | } else if (Revision == ARM_GIC_ARCH_REVISION_3) {\r |
202 | ArmGicV3EndOfInterrupt (Source);\r | |
d5c6b7fc OM |
203 | } else {\r |
204 | ASSERT_EFI_ERROR (EFI_UNSUPPORTED);\r | |
205 | }\r | |
397bdc99 OM |
206 | }\r |
207 | \r | |
208 | VOID\r | |
209 | EFIAPI\r | |
210 | ArmGicEnableInterrupt (\r | |
211 | IN UINTN GicDistributorBase,\r | |
41fb5d46 | 212 | IN UINTN GicRedistributorBase,\r |
397bdc99 OM |
213 | IN UINTN Source\r |
214 | )\r | |
215 | {\r | |
41fb5d46 OM |
216 | UINT32 RegOffset;\r |
217 | UINTN RegShift;\r | |
218 | ARM_GIC_ARCH_REVISION Revision;\r | |
219 | UINTN GicCpuRedistributorBase;\r | |
397bdc99 OM |
220 | \r |
221 | // Calculate enable register offset and bit position\r | |
222 | RegOffset = Source / 32;\r | |
223 | RegShift = Source % 32;\r | |
224 | \r | |
41fb5d46 | 225 | Revision = ArmGicGetSupportedArchRevision ();\r |
28f8d28f AB |
226 | if ((Revision == ARM_GIC_ARCH_REVISION_2) ||\r |
227 | FeaturePcdGet (PcdArmGicV3WithV2Legacy) ||\r | |
228 | SourceIsSpi (Source)) {\r | |
41fb5d46 | 229 | // Write set-enable register\r |
b0393756 EL |
230 | MmioWrite32 (\r |
231 | GicDistributorBase + ARM_GIC_ICDISER + (4 * RegOffset),\r | |
232 | 1 << RegShift\r | |
233 | );\r | |
41fb5d46 | 234 | } else {\r |
b0393756 EL |
235 | GicCpuRedistributorBase = GicGetCpuRedistributorBase (\r |
236 | GicRedistributorBase,\r | |
237 | Revision\r | |
238 | );\r | |
41fb5d46 OM |
239 | if (GicCpuRedistributorBase == 0) {\r |
240 | ASSERT_EFI_ERROR (EFI_NOT_FOUND);\r | |
241 | return;\r | |
242 | }\r | |
243 | \r | |
244 | // Write set-enable register\r | |
b0393756 EL |
245 | MmioWrite32 (\r |
246 | ISENABLER_ADDRESS(GicCpuRedistributorBase, RegOffset),\r | |
247 | 1 << RegShift\r | |
248 | );\r | |
41fb5d46 | 249 | }\r |
397bdc99 OM |
250 | }\r |
251 | \r | |
252 | VOID\r | |
253 | EFIAPI\r | |
254 | ArmGicDisableInterrupt (\r | |
255 | IN UINTN GicDistributorBase,\r | |
41fb5d46 | 256 | IN UINTN GicRedistributorBase,\r |
397bdc99 OM |
257 | IN UINTN Source\r |
258 | )\r | |
259 | {\r | |
41fb5d46 OM |
260 | UINT32 RegOffset;\r |
261 | UINTN RegShift;\r | |
262 | ARM_GIC_ARCH_REVISION Revision;\r | |
263 | UINTN GicCpuRedistributorBase;\r | |
397bdc99 OM |
264 | \r |
265 | // Calculate enable register offset and bit position\r | |
266 | RegOffset = Source / 32;\r | |
267 | RegShift = Source % 32;\r | |
268 | \r | |
41fb5d46 | 269 | Revision = ArmGicGetSupportedArchRevision ();\r |
28f8d28f AB |
270 | if ((Revision == ARM_GIC_ARCH_REVISION_2) ||\r |
271 | FeaturePcdGet (PcdArmGicV3WithV2Legacy) ||\r | |
272 | SourceIsSpi (Source)) {\r | |
41fb5d46 | 273 | // Write clear-enable register\r |
b0393756 EL |
274 | MmioWrite32 (\r |
275 | GicDistributorBase + ARM_GIC_ICDICER + (4 * RegOffset),\r | |
276 | 1 << RegShift\r | |
277 | );\r | |
41fb5d46 | 278 | } else {\r |
b0393756 EL |
279 | GicCpuRedistributorBase = GicGetCpuRedistributorBase (\r |
280 | GicRedistributorBase,\r | |
281 | Revision\r | |
282 | );\r | |
41fb5d46 OM |
283 | if (GicCpuRedistributorBase == 0) {\r |
284 | return;\r | |
285 | }\r | |
286 | \r | |
287 | // Write clear-enable register\r | |
b0393756 EL |
288 | MmioWrite32 (\r |
289 | ICENABLER_ADDRESS(GicCpuRedistributorBase, RegOffset),\r | |
290 | 1 << RegShift\r | |
291 | );\r | |
41fb5d46 | 292 | }\r |
397bdc99 OM |
293 | }\r |
294 | \r | |
295 | BOOLEAN\r | |
296 | EFIAPI\r | |
297 | ArmGicIsInterruptEnabled (\r | |
298 | IN UINTN GicDistributorBase,\r | |
41fb5d46 | 299 | IN UINTN GicRedistributorBase,\r |
397bdc99 OM |
300 | IN UINTN Source\r |
301 | )\r | |
302 | {\r | |
41fb5d46 OM |
303 | UINT32 RegOffset;\r |
304 | UINTN RegShift;\r | |
305 | ARM_GIC_ARCH_REVISION Revision;\r | |
306 | UINTN GicCpuRedistributorBase;\r | |
307 | UINT32 Interrupts;\r | |
397bdc99 OM |
308 | \r |
309 | // Calculate enable register offset and bit position\r | |
310 | RegOffset = Source / 32;\r | |
311 | RegShift = Source % 32;\r | |
312 | \r | |
41fb5d46 | 313 | Revision = ArmGicGetSupportedArchRevision ();\r |
28f8d28f AB |
314 | if ((Revision == ARM_GIC_ARCH_REVISION_2) ||\r |
315 | FeaturePcdGet (PcdArmGicV3WithV2Legacy) ||\r | |
316 | SourceIsSpi (Source)) {\r | |
b0393756 EL |
317 | Interrupts = ((MmioRead32 (\r |
318 | GicDistributorBase + ARM_GIC_ICDISER + (4 * RegOffset)\r | |
319 | )\r | |
320 | & (1 << RegShift)) != 0);\r | |
41fb5d46 | 321 | } else {\r |
b0393756 EL |
322 | GicCpuRedistributorBase = GicGetCpuRedistributorBase (\r |
323 | GicRedistributorBase,\r | |
324 | Revision\r | |
325 | );\r | |
41fb5d46 OM |
326 | if (GicCpuRedistributorBase == 0) {\r |
327 | return 0;\r | |
328 | }\r | |
329 | \r | |
330 | // Read set-enable register\r | |
b0393756 EL |
331 | Interrupts = MmioRead32 (\r |
332 | ISENABLER_ADDRESS(GicCpuRedistributorBase, RegOffset)\r | |
333 | );\r | |
41fb5d46 OM |
334 | }\r |
335 | \r | |
336 | return ((Interrupts & (1 << RegShift)) != 0);\r | |
397bdc99 | 337 | }\r |
60775c51 OM |
338 | \r |
339 | VOID\r | |
340 | EFIAPI\r | |
341 | ArmGicDisableDistributor (\r | |
342 | IN INTN GicDistributorBase\r | |
343 | )\r | |
344 | {\r | |
345 | // Disable Gic Distributor\r | |
346 | MmioWrite32 (GicDistributorBase + ARM_GIC_ICDDCR, 0x0);\r | |
347 | }\r | |
62d441fb | 348 | \r |
793ca69f OM |
349 | VOID\r |
350 | EFIAPI\r | |
351 | ArmGicEnableInterruptInterface (\r | |
352 | IN INTN GicInterruptInterfaceBase\r | |
353 | )\r | |
354 | {\r | |
d5c6b7fc OM |
355 | ARM_GIC_ARCH_REVISION Revision;\r |
356 | \r | |
357 | Revision = ArmGicGetSupportedArchRevision ();\r | |
358 | if (Revision == ARM_GIC_ARCH_REVISION_2) {\r | |
359 | ArmGicV2EnableInterruptInterface (GicInterruptInterfaceBase);\r | |
d7133859 OM |
360 | } else if (Revision == ARM_GIC_ARCH_REVISION_3) {\r |
361 | ArmGicV3EnableInterruptInterface ();\r | |
d5c6b7fc OM |
362 | } else {\r |
363 | ASSERT_EFI_ERROR (EFI_UNSUPPORTED);\r | |
364 | }\r | |
793ca69f OM |
365 | }\r |
366 | \r | |
367 | VOID\r | |
368 | EFIAPI\r | |
369 | ArmGicDisableInterruptInterface (\r | |
370 | IN INTN GicInterruptInterfaceBase\r | |
371 | )\r | |
372 | {\r | |
d5c6b7fc OM |
373 | ARM_GIC_ARCH_REVISION Revision;\r |
374 | \r | |
375 | Revision = ArmGicGetSupportedArchRevision ();\r | |
376 | if (Revision == ARM_GIC_ARCH_REVISION_2) {\r | |
377 | ArmGicV2DisableInterruptInterface (GicInterruptInterfaceBase);\r | |
d7133859 OM |
378 | } else if (Revision == ARM_GIC_ARCH_REVISION_3) {\r |
379 | ArmGicV3DisableInterruptInterface ();\r | |
d5c6b7fc OM |
380 | } else {\r |
381 | ASSERT_EFI_ERROR (EFI_UNSUPPORTED);\r | |
382 | }\r | |
793ca69f | 383 | }\r |