]>
Commit | Line | Data |
---|---|---|
8aba40b7 LE |
1 | /** @file\r |
2 | This driver implements EFI_PCI_HOT_PLUG_INIT_PROTOCOL, providing the PCI bus\r | |
3 | driver with resource padding information, for PCIe hotplug purposes.\r | |
4 | \r | |
5 | Copyright (C) 2016, Red Hat, Inc.\r | |
6 | \r | |
7 | This program and the accompanying materials are licensed and made available\r | |
8 | under the terms and conditions of the BSD License which accompanies this\r | |
9 | distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
13 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | **/\r | |
15 | \r | |
16 | #include <IndustryStandard/Acpi10.h>\r | |
17 | \r | |
4776d5cb | 18 | #include <Library/BaseLib.h>\r |
a9803247 | 19 | #include <Library/BaseMemoryLib.h>\r |
8aba40b7 LE |
20 | #include <Library/DebugLib.h>\r |
21 | #include <Library/DevicePathLib.h>\r | |
22 | #include <Library/MemoryAllocationLib.h>\r | |
23 | #include <Library/UefiBootServicesTableLib.h>\r | |
24 | \r | |
25 | #include <Protocol/PciHotPlugInit.h>\r | |
26 | #include <Protocol/PciRootBridgeIo.h>\r | |
27 | \r | |
28 | //\r | |
29 | // The protocol interface this driver produces.\r | |
30 | //\r | |
31 | // Refer to 12.6 "PCI Hot Plug PCI Initialization Protocol" in the Platform\r | |
32 | // Init 1.4a Spec, Volume 5.\r | |
33 | //\r | |
34 | STATIC EFI_PCI_HOT_PLUG_INIT_PROTOCOL mPciHotPlugInit;\r | |
35 | \r | |
36 | \r | |
37 | //\r | |
38 | // Resource padding template for the GetResourcePadding() protocol member\r | |
39 | // function.\r | |
40 | //\r | |
41 | // Refer to Table 8 "ACPI 2.0 & 3.0 QWORD Address Space Descriptor Usage" in\r | |
42 | // the Platform Init 1.4a Spec, Volume 5.\r | |
43 | //\r | |
44 | // This structure is interpreted by the ApplyResourcePadding() function in the\r | |
45 | // edk2 PCI Bus UEFI_DRIVER.\r | |
46 | //\r | |
a9803247 LE |
47 | // We can request padding for at most four resource types, each of which is\r |
48 | // optional, independently of the others:\r | |
49 | // (a) bus numbers,\r | |
50 | // (b) IO space,\r | |
51 | // (c) non-prefetchable MMIO space (32-bit only),\r | |
52 | // (d) prefetchable MMIO space (either 32-bit or 64-bit, never both).\r | |
53 | //\r | |
8aba40b7 LE |
54 | #pragma pack (1)\r |
55 | typedef struct {\r | |
a9803247 | 56 | EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR Padding[4];\r |
8aba40b7 LE |
57 | EFI_ACPI_END_TAG_DESCRIPTOR EndDesc;\r |
58 | } RESOURCE_PADDING;\r | |
59 | #pragma pack ()\r | |
60 | \r | |
a9803247 LE |
61 | \r |
62 | /**\r | |
63 | Initialize a RESOURCE_PADDING object.\r | |
64 | \r | |
65 | @param[out] ResourcePadding The caller-allocated RESOURCE_PADDING object to\r | |
66 | initialize.\r | |
67 | **/\r | |
68 | STATIC\r | |
69 | VOID\r | |
70 | InitializeResourcePadding (\r | |
71 | OUT RESOURCE_PADDING *ResourcePadding\r | |
72 | )\r | |
73 | {\r | |
74 | UINTN Index;\r | |
75 | \r | |
76 | ZeroMem (ResourcePadding, sizeof *ResourcePadding);\r | |
8aba40b7 LE |
77 | \r |
78 | //\r | |
a9803247 | 79 | // Fill in the Padding fields that don't vary across resource types.\r |
8aba40b7 | 80 | //\r |
a9803247 LE |
81 | for (Index = 0; Index < ARRAY_SIZE (ResourcePadding->Padding); ++Index) {\r |
82 | EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptor;\r | |
83 | \r | |
84 | Descriptor = ResourcePadding->Padding + Index;\r | |
85 | Descriptor->Desc = ACPI_ADDRESS_SPACE_DESCRIPTOR;\r | |
86 | Descriptor->Len = (UINT16)(\r | |
87 | sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) -\r | |
88 | OFFSET_OF (\r | |
89 | EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR,\r | |
90 | ResType\r | |
91 | )\r | |
92 | );\r | |
93 | }\r | |
8aba40b7 LE |
94 | \r |
95 | //\r | |
a9803247 | 96 | // Fill in the End Tag.\r |
8aba40b7 | 97 | //\r |
a9803247 LE |
98 | ResourcePadding->EndDesc.Desc = ACPI_END_TAG_DESCRIPTOR;\r |
99 | }\r | |
8aba40b7 LE |
100 | \r |
101 | \r | |
4776d5cb LE |
102 | /**\r |
103 | Set up a descriptor entry for reserving IO space.\r | |
104 | \r | |
105 | @param[in,out] Descriptor The descriptor to configure. The caller shall have\r | |
106 | initialized Descriptor earlier, with\r | |
107 | InitializeResourcePadding().\r | |
108 | \r | |
109 | @param[in] SizeExponent The size and natural alignment of the reservation\r | |
110 | are determined by raising two to this power.\r | |
111 | **/\r | |
112 | STATIC\r | |
113 | VOID\r | |
114 | SetIoPadding (\r | |
115 | IN OUT EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptor,\r | |
116 | IN UINTN SizeExponent\r | |
117 | )\r | |
118 | {\r | |
119 | Descriptor->ResType = ACPI_ADDRESS_SPACE_TYPE_IO;\r | |
120 | Descriptor->AddrLen = LShiftU64 (1, SizeExponent);\r | |
121 | Descriptor->AddrRangeMax = Descriptor->AddrLen - 1;\r | |
122 | }\r | |
123 | \r | |
124 | \r | |
125 | /**\r | |
126 | Set up a descriptor entry for reserving MMIO space.\r | |
127 | \r | |
128 | @param[in,out] Descriptor The descriptor to configure. The caller shall\r | |
129 | have initialized Descriptor earlier, with\r | |
130 | InitializeResourcePadding().\r | |
131 | \r | |
132 | @param[in] Prefetchable TRUE if the descriptor should reserve\r | |
133 | prefetchable MMIO space. Pass FALSE for\r | |
134 | reserving non-prefetchable MMIO space.\r | |
135 | \r | |
136 | @param[in] ThirtyTwoBitOnly TRUE if the reservation should be limited to\r | |
137 | 32-bit address space. FALSE if the reservation\r | |
138 | can be satisfied from 64-bit address space.\r | |
139 | ThirtyTwoBitOnly is ignored if Prefetchable is\r | |
140 | FALSE; in that case ThirtyTwoBitOnly is always\r | |
141 | considered TRUE.\r | |
142 | \r | |
143 | @param[in] SizeExponent The size and natural alignment of the\r | |
144 | reservation are determined by raising two to\r | |
145 | this power.\r | |
146 | **/\r | |
147 | STATIC\r | |
148 | VOID\r | |
149 | SetMmioPadding (\r | |
150 | IN OUT EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptor,\r | |
151 | IN BOOLEAN Prefetchable,\r | |
152 | IN BOOLEAN ThirtyTwoBitOnly,\r | |
153 | IN UINTN SizeExponent\r | |
154 | )\r | |
155 | {\r | |
156 | Descriptor->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;\r | |
157 | if (Prefetchable) {\r | |
158 | Descriptor->SpecificFlag =\r | |
159 | EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_CACHEABLE_PREFETCHABLE;\r | |
160 | Descriptor->AddrSpaceGranularity = ThirtyTwoBitOnly ? 32 : 64;\r | |
161 | } else {\r | |
162 | Descriptor->SpecificFlag =\r | |
163 | EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_NON_CACHEABLE;\r | |
164 | Descriptor->AddrSpaceGranularity = 32;\r | |
165 | }\r | |
166 | Descriptor->AddrLen = LShiftU64 (1, SizeExponent);\r | |
167 | Descriptor->AddrRangeMax = Descriptor->AddrLen - 1;\r | |
168 | }\r | |
169 | \r | |
170 | \r | |
171 | /**\r | |
172 | Round up a positive 32-bit value to the next whole power of two, and return\r | |
173 | the bit position of the highest bit set in the result. Equivalent to\r | |
174 | ceil(log2(x)).\r | |
175 | \r | |
176 | @param[in] Operand The 32-bit operand to evaluate.\r | |
177 | \r | |
178 | @retval -1 Operand is zero.\r | |
179 | \r | |
180 | @retval -1 Operand is positive, not a whole power of two, and rounding it\r | |
181 | up to the next power of two does not fit into 32 bits.\r | |
182 | \r | |
183 | @retval 0..31 Otherwise, return ceil(log2(Value)).\r | |
184 | **/\r | |
185 | STATIC\r | |
186 | INTN\r | |
187 | HighBitSetRoundUp32 (\r | |
188 | IN UINT32 Operand\r | |
189 | )\r | |
190 | {\r | |
191 | INTN HighBit;\r | |
192 | \r | |
193 | HighBit = HighBitSet32 (Operand);\r | |
194 | if (HighBit == -1) {\r | |
195 | //\r | |
196 | // Operand is zero.\r | |
197 | //\r | |
198 | return HighBit;\r | |
199 | }\r | |
200 | if ((Operand & (Operand - 1)) != 0) {\r | |
201 | //\r | |
202 | // Operand is not a whole power of two.\r | |
203 | //\r | |
204 | ++HighBit;\r | |
205 | }\r | |
206 | return (HighBit < 32) ? HighBit : -1;\r | |
207 | }\r | |
208 | \r | |
209 | \r | |
210 | /**\r | |
211 | Round up a positive 64-bit value to the next whole power of two, and return\r | |
212 | the bit position of the highest bit set in the result. Equivalent to\r | |
213 | ceil(log2(x)).\r | |
214 | \r | |
215 | @param[in] Operand The 64-bit operand to evaluate.\r | |
216 | \r | |
217 | @retval -1 Operand is zero.\r | |
218 | \r | |
219 | @retval -1 Operand is positive, not a whole power of two, and rounding it\r | |
220 | up to the next power of two does not fit into 64 bits.\r | |
221 | \r | |
222 | @retval 0..63 Otherwise, return ceil(log2(Value)).\r | |
223 | **/\r | |
224 | STATIC\r | |
225 | INTN\r | |
226 | HighBitSetRoundUp64 (\r | |
227 | IN UINT64 Operand\r | |
228 | )\r | |
229 | {\r | |
230 | INTN HighBit;\r | |
231 | \r | |
232 | HighBit = HighBitSet64 (Operand);\r | |
233 | if (HighBit == -1) {\r | |
234 | //\r | |
235 | // Operand is zero.\r | |
236 | //\r | |
237 | return HighBit;\r | |
238 | }\r | |
239 | if ((Operand & (Operand - 1)) != 0) {\r | |
240 | //\r | |
241 | // Operand is not a whole power of two.\r | |
242 | //\r | |
243 | ++HighBit;\r | |
244 | }\r | |
245 | return (HighBit < 64) ? HighBit : -1;\r | |
246 | }\r | |
247 | \r | |
248 | \r | |
8aba40b7 LE |
249 | /**\r |
250 | Returns a list of root Hot Plug Controllers (HPCs) that require\r | |
251 | initialization during the boot process.\r | |
252 | \r | |
253 | This procedure returns a list of root HPCs. The PCI bus driver must\r | |
254 | initialize these controllers during the boot process. The PCI bus driver may\r | |
255 | or may not be able to detect these HPCs. If the platform includes a\r | |
256 | PCI-to-CardBus bridge, it can be included in this list if it requires\r | |
257 | initialization. The HpcList must be self consistent. An HPC cannot control\r | |
258 | any of its parent buses. Only one HPC can control a PCI bus. Because this\r | |
259 | list includes only root HPCs, no HPC in the list can be a child of another\r | |
260 | HPC. This policy must be enforced by the EFI_PCI_HOT_PLUG_INIT_PROTOCOL.\r | |
261 | The PCI bus driver may not check for such invalid conditions. The callee\r | |
262 | allocates the buffer HpcList\r | |
263 | \r | |
264 | @param[in] This Pointer to the EFI_PCI_HOT_PLUG_INIT_PROTOCOL\r | |
265 | instance.\r | |
266 | @param[out] HpcCount The number of root HPCs that were returned.\r | |
267 | @param[out] HpcList The list of root HPCs. HpcCount defines the number of\r | |
268 | elements in this list.\r | |
269 | \r | |
270 | @retval EFI_SUCCESS HpcList was returned.\r | |
271 | @retval EFI_OUT_OF_RESOURCES HpcList was not returned due to insufficient\r | |
272 | resources.\r | |
273 | @retval EFI_INVALID_PARAMETER HpcCount is NULL or HpcList is NULL.\r | |
274 | **/\r | |
275 | STATIC\r | |
276 | EFI_STATUS\r | |
277 | EFIAPI\r | |
278 | GetRootHpcList (\r | |
279 | IN EFI_PCI_HOT_PLUG_INIT_PROTOCOL *This,\r | |
280 | OUT UINTN *HpcCount,\r | |
281 | OUT EFI_HPC_LOCATION **HpcList\r | |
282 | )\r | |
283 | {\r | |
284 | if (HpcCount == NULL || HpcList == NULL) {\r | |
285 | return EFI_INVALID_PARAMETER;\r | |
286 | }\r | |
287 | \r | |
288 | //\r | |
289 | // There are no top-level (i.e., un-enumerable) hot-plug controllers in QEMU\r | |
290 | // that would require special initialization.\r | |
291 | //\r | |
292 | *HpcCount = 0;\r | |
293 | *HpcList = NULL;\r | |
294 | return EFI_SUCCESS;\r | |
295 | }\r | |
296 | \r | |
297 | \r | |
298 | /**\r | |
299 | Initializes one root Hot Plug Controller (HPC). This process may causes\r | |
300 | initialization of its subordinate buses.\r | |
301 | \r | |
302 | This function initializes the specified HPC. At the end of initialization,\r | |
303 | the hot-plug slots or sockets (controlled by this HPC) are powered and are\r | |
304 | connected to the bus. All the necessary registers in the HPC are set up. For\r | |
305 | a Standard (PCI) Hot Plug Controller (SHPC), the registers that must be set\r | |
306 | up are defined in the PCI Standard Hot Plug Controller and Subsystem\r | |
307 | Specification.\r | |
308 | \r | |
309 | @param[in] This Pointer to the EFI_PCI_HOT_PLUG_INIT_PROTOCOL\r | |
310 | instance.\r | |
311 | @param[in] HpcDevicePath The device path to the HPC that is being\r | |
312 | initialized.\r | |
313 | @param[in] HpcPciAddress The address of the HPC function on the PCI bus.\r | |
314 | @param[in] Event The event that should be signaled when the HPC\r | |
315 | initialization is complete. Set to NULL if the\r | |
316 | caller wants to wait until the entire\r | |
317 | initialization process is complete.\r | |
318 | @param[out] HpcState The state of the HPC hardware. The state is\r | |
319 | EFI_HPC_STATE_INITIALIZED or\r | |
320 | EFI_HPC_STATE_ENABLED.\r | |
321 | \r | |
322 | @retval EFI_SUCCESS If Event is NULL, the specific HPC was\r | |
323 | successfully initialized. If Event is not\r | |
324 | NULL, Event will be signaled at a later time\r | |
325 | when initialization is complete.\r | |
326 | @retval EFI_UNSUPPORTED This instance of\r | |
327 | EFI_PCI_HOT_PLUG_INIT_PROTOCOL does not\r | |
328 | support the specified HPC.\r | |
329 | @retval EFI_OUT_OF_RESOURCES Initialization failed due to insufficient\r | |
330 | resources.\r | |
331 | @retval EFI_INVALID_PARAMETER HpcState is NULL.\r | |
332 | **/\r | |
333 | STATIC\r | |
334 | EFI_STATUS\r | |
335 | EFIAPI\r | |
336 | InitializeRootHpc (\r | |
337 | IN EFI_PCI_HOT_PLUG_INIT_PROTOCOL *This,\r | |
338 | IN EFI_DEVICE_PATH_PROTOCOL *HpcDevicePath,\r | |
339 | IN UINT64 HpcPciAddress,\r | |
340 | IN EFI_EVENT Event, OPTIONAL\r | |
341 | OUT EFI_HPC_STATE *HpcState\r | |
342 | )\r | |
343 | {\r | |
344 | //\r | |
345 | // This function should never be called, due to the information returned by\r | |
346 | // GetRootHpcList().\r | |
347 | //\r | |
348 | ASSERT (FALSE);\r | |
349 | \r | |
350 | if (HpcState == NULL) {\r | |
351 | return EFI_INVALID_PARAMETER;\r | |
352 | }\r | |
353 | return EFI_UNSUPPORTED;\r | |
354 | }\r | |
355 | \r | |
356 | \r | |
357 | /**\r | |
358 | Returns the resource padding that is required by the PCI bus that is\r | |
359 | controlled by the specified Hot Plug Controller (HPC).\r | |
360 | \r | |
361 | This function returns the resource padding that is required by the PCI bus\r | |
362 | that is controlled by the specified HPC. This member function is called for\r | |
363 | all the root HPCs and nonroot HPCs that are detected by the PCI bus\r | |
364 | enumerator. This function will be called before PCI resource allocation is\r | |
365 | completed. This function must be called after all the root HPCs, with the\r | |
366 | possible exception of a PCI-to-CardBus bridge, have completed\r | |
367 | initialization.\r | |
368 | \r | |
369 | @param[in] This Pointer to the EFI_PCI_HOT_PLUG_INIT_PROTOCOL\r | |
370 | instance.\r | |
371 | @param[in] HpcDevicePath The device path to the HPC.\r | |
372 | @param[in] HpcPciAddress The address of the HPC function on the PCI bus.\r | |
373 | @param[in] HpcState The state of the HPC hardware.\r | |
374 | @param[out] Padding The amount of resource padding that is required\r | |
375 | by the PCI bus under the control of the specified\r | |
376 | HPC.\r | |
377 | @param[out] Attributes Describes how padding is accounted for. The\r | |
378 | padding is returned in the form of ACPI 2.0\r | |
379 | resource descriptors.\r | |
380 | \r | |
381 | @retval EFI_SUCCESS The resource padding was successfully\r | |
382 | returned.\r | |
383 | @retval EFI_UNSUPPORTED This instance of the\r | |
384 | EFI_PCI_HOT_PLUG_INIT_PROTOCOL does not\r | |
385 | support the specified HPC.\r | |
386 | @retval EFI_NOT_READY This function was called before HPC\r | |
387 | initialization is complete.\r | |
388 | @retval EFI_INVALID_PARAMETER HpcState or Padding or Attributes is NULL.\r | |
389 | @retval EFI_OUT_OF_RESOURCES ACPI 2.0 resource descriptors for Padding\r | |
390 | cannot be allocated due to insufficient\r | |
391 | resources.\r | |
392 | **/\r | |
393 | STATIC\r | |
394 | EFI_STATUS\r | |
395 | EFIAPI\r | |
396 | GetResourcePadding (\r | |
397 | IN EFI_PCI_HOT_PLUG_INIT_PROTOCOL *This,\r | |
398 | IN EFI_DEVICE_PATH_PROTOCOL *HpcDevicePath,\r | |
399 | IN UINT64 HpcPciAddress,\r | |
400 | OUT EFI_HPC_STATE *HpcState,\r | |
401 | OUT VOID **Padding,\r | |
402 | OUT EFI_HPC_PADDING_ATTRIBUTES *Attributes\r | |
403 | )\r | |
404 | {\r | |
a9803247 LE |
405 | BOOLEAN DefaultIo;\r |
406 | BOOLEAN DefaultMmio;\r | |
407 | RESOURCE_PADDING ReservationRequest;\r | |
408 | EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *FirstResource;\r | |
409 | \r | |
8aba40b7 LE |
410 | DEBUG_CODE (\r |
411 | EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_PCI_ADDRESS *Address;\r | |
412 | CHAR16 *DevicePathString;\r | |
413 | \r | |
414 | Address = (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_PCI_ADDRESS *)&HpcPciAddress;\r | |
415 | DevicePathString = ConvertDevicePathToText (HpcDevicePath, FALSE, FALSE);\r | |
416 | \r | |
417 | DEBUG ((EFI_D_VERBOSE, "%a: Address=%02x:%02x.%x DevicePath=%s\n",\r | |
418 | __FUNCTION__, Address->Bus, Address->Device, Address->Function,\r | |
419 | (DevicePathString == NULL) ? L"<unavailable>" : DevicePathString));\r | |
420 | \r | |
421 | if (DevicePathString != NULL) {\r | |
422 | FreePool (DevicePathString);\r | |
423 | }\r | |
424 | );\r | |
425 | \r | |
426 | if (HpcState == NULL || Padding == NULL || Attributes == NULL) {\r | |
427 | return EFI_INVALID_PARAMETER;\r | |
428 | }\r | |
429 | \r | |
a9803247 LE |
430 | DefaultIo = TRUE;\r |
431 | DefaultMmio = TRUE;\r | |
432 | \r | |
433 | //\r | |
434 | // Init ReservationRequest, and point FirstResource one past the last\r | |
435 | // descriptor entry. We're going to build the entries backwards from\r | |
436 | // ReservationRequest.EndDesc.\r | |
437 | //\r | |
438 | InitializeResourcePadding (&ReservationRequest);\r | |
439 | FirstResource = ReservationRequest.Padding +\r | |
440 | ARRAY_SIZE (ReservationRequest.Padding);\r | |
441 | \r | |
442 | //\r | |
443 | // (b) Reserve IO space.\r | |
444 | //\r | |
445 | if (DefaultIo) {\r | |
446 | //\r | |
447 | // Request defaults.\r | |
448 | //\r | |
4776d5cb | 449 | SetIoPadding (--FirstResource, (UINTN)HighBitSetRoundUp64 (512));\r |
a9803247 LE |
450 | }\r |
451 | \r | |
452 | //\r | |
453 | // (c) Reserve non-prefetchable MMIO space (32-bit only).\r | |
454 | //\r | |
455 | if (DefaultMmio) {\r | |
456 | //\r | |
457 | // Request defaults.\r | |
458 | //\r | |
4776d5cb LE |
459 | SetMmioPadding (\r |
460 | --FirstResource,\r | |
461 | FALSE,\r | |
462 | TRUE,\r | |
463 | (UINTN)HighBitSetRoundUp32 (SIZE_2MB)\r | |
464 | );\r | |
a9803247 LE |
465 | }\r |
466 | \r | |
467 | //\r | |
468 | // Output a copy of ReservationRequest from the lowest-address populated\r | |
469 | // entry until the end of the structure (including\r | |
470 | // ReservationRequest.EndDesc). If no reservations are necessary, we'll only\r | |
471 | // output the End Tag.\r | |
472 | //\r | |
473 | *Padding = AllocateCopyPool (\r | |
474 | (UINT8 *)(&ReservationRequest + 1) - (UINT8 *)FirstResource,\r | |
475 | FirstResource\r | |
476 | );\r | |
8aba40b7 LE |
477 | if (*Padding == NULL) {\r |
478 | return EFI_OUT_OF_RESOURCES;\r | |
479 | }\r | |
480 | \r | |
481 | //\r | |
482 | // Resource padding is required.\r | |
483 | //\r | |
484 | *HpcState = EFI_HPC_STATE_INITIALIZED | EFI_HPC_STATE_ENABLED;\r | |
485 | \r | |
486 | //\r | |
487 | // The padding should be applied at PCI bus level, and considered by upstream\r | |
488 | // bridges, recursively.\r | |
489 | //\r | |
490 | *Attributes = EfiPaddingPciBus;\r | |
491 | return EFI_SUCCESS;\r | |
492 | }\r | |
493 | \r | |
494 | \r | |
495 | /**\r | |
496 | Entry point for this driver.\r | |
497 | \r | |
498 | @param[in] ImageHandle Image handle of this driver.\r | |
499 | @param[in] SystemTable Pointer to SystemTable.\r | |
500 | \r | |
501 | @retval EFI_SUCESS Driver has loaded successfully.\r | |
502 | @return Error codes from lower level functions.\r | |
503 | \r | |
504 | **/\r | |
505 | EFI_STATUS\r | |
506 | EFIAPI\r | |
507 | DriverInitialize (\r | |
508 | IN EFI_HANDLE ImageHandle,\r | |
509 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
510 | )\r | |
511 | {\r | |
512 | EFI_STATUS Status;\r | |
513 | \r | |
514 | mPciHotPlugInit.GetRootHpcList = GetRootHpcList;\r | |
515 | mPciHotPlugInit.InitializeRootHpc = InitializeRootHpc;\r | |
516 | mPciHotPlugInit.GetResourcePadding = GetResourcePadding;\r | |
517 | Status = gBS->InstallMultipleProtocolInterfaces (&ImageHandle,\r | |
518 | &gEfiPciHotPlugInitProtocolGuid, &mPciHotPlugInit, NULL);\r | |
519 | return Status;\r | |
520 | }\r |