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bcecde14 | 1 | /** @file\r |
2 | Helper Routines that use a PXE-enabled NIC option ROM.\r | |
0a6f4824 LG |
3 | \r |
4 | Copyright (c) 1999 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
bcecde14 | 5 | \r |
c0a00b14 | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
bcecde14 | 7 | \r |
8 | **/\r | |
9 | \r | |
10 | #include "BiosSnp16.h"\r | |
11 | \r | |
12 | #define TO_SEGMENT(x) ((UINT16) (RShiftU64 ((UINT32)(UINTN) (x), 4) & 0xF000))\r | |
13 | #define TO_OFFSET(x) ((UINT16) ((UINT32)(UINTN) (x) & 0xFFFF))\r | |
14 | #define PARAGRAPH_SIZE 0x10\r | |
15 | #define IVT_BASE 0x00000000\r | |
16 | \r | |
17 | #pragma pack(1)\r | |
18 | typedef struct {\r | |
19 | UINT16 Signature; ///< 0xaa55\r | |
20 | UINT8 ROMlength; ///< size of this ROM in 512 byte blocks\r | |
21 | UINT8 InitEntryPoint[4]; ///< a jump to the initialization routine\r | |
22 | UINT8 Reserved[0xf]; ///< various\r | |
23 | UINT16 PxeRomIdOffset; ///< offset of UNDI, $BC$, or BUSD ROM ID structure\r | |
24 | UINT16 PcirHeaderOffset; ///< offset of PCI Expansion Header\r | |
25 | UINT16 PnpHeaderOffset; ///< offset of Plug and Play Expansion Header\r | |
26 | } OPTION_ROM_HEADER;\r | |
27 | #pragma pack()\r | |
28 | \r | |
29 | UINT32 CachedVectorAddress[0x100];\r | |
30 | \r | |
31 | /**\r | |
32 | Cache Interrupt verctor address converted from IVT number.\r | |
33 | \r | |
34 | @param VectorNumber IVT number\r | |
0a6f4824 | 35 | \r |
bcecde14 | 36 | @retval EFI_SUCCESS Success to operation.\r |
37 | **/\r | |
38 | EFI_STATUS\r | |
39 | CacheVectorAddress (\r | |
40 | UINT8 VectorNumber\r | |
41 | )\r | |
42 | {\r | |
43 | UINT32 *Address;\r | |
44 | \r | |
aa5f60ae | 45 | Address = (UINT32 *) ((UINTN) IVT_BASE + VectorNumber * 4);\r |
bcecde14 | 46 | CachedVectorAddress[VectorNumber] = *Address;\r |
47 | return EFI_SUCCESS;\r | |
48 | }\r | |
49 | \r | |
50 | /**\r | |
0a6f4824 LG |
51 | Get interrupt vector address according to IVT number.\r |
52 | \r | |
bcecde14 | 53 | @param VectorNumber Given IVT number\r |
0a6f4824 | 54 | \r |
bcecde14 | 55 | @return cached interrupt vector address.\r |
56 | **/\r | |
57 | EFI_STATUS\r | |
58 | RestoreCachedVectorAddress (\r | |
59 | UINT8 VectorNumber\r | |
60 | )\r | |
61 | {\r | |
62 | UINT32 *Address;\r | |
63 | \r | |
aa5f60ae | 64 | Address = (UINT32 *) ((UINTN) IVT_BASE + VectorNumber * 4);\r |
bcecde14 | 65 | *Address = CachedVectorAddress[VectorNumber];\r |
66 | return EFI_SUCCESS;\r | |
67 | }\r | |
68 | \r | |
69 | /**\r | |
0a6f4824 LG |
70 | Print Undi loader table.\r |
71 | \r | |
72 | @param UndiLoaderStructure Point to Undi Loader table structure.\r | |
bcecde14 | 73 | \r |
bcecde14 | 74 | **/\r |
75 | VOID\r | |
76 | Print_Undi_Loader_Table (\r | |
77 | VOID *UndiLoaderStructure\r | |
78 | )\r | |
79 | {\r | |
80 | UNDI_LOADER_T *DisplayPointer;\r | |
81 | \r | |
82 | DisplayPointer = (UNDI_LOADER_T *) UndiLoaderStructure;\r | |
83 | \r | |
84 | DEBUG ((DEBUG_NET, "Before Parsing the table contents, the table itself lives\n"));\r | |
85 | DEBUG ((DEBUG_NET, "\tat the address 0x%X\n\r", (UINT32)(UINTN) UndiLoaderStructure));\r | |
86 | \r | |
87 | DEBUG ((DEBUG_NET, "\n\rStatus = 0x%X\n\r", DisplayPointer->Status));\r | |
88 | DEBUG ((DEBUG_NET, "\t_AX_= 0x%X\n\r", DisplayPointer->Ax));\r | |
89 | DEBUG ((DEBUG_NET, "\t_BX_= 0x%X\n\r", DisplayPointer->Bx));\r | |
90 | DEBUG ((DEBUG_NET, "\t_DX_= 0x%X\n\r", DisplayPointer->Dx));\r | |
91 | DEBUG ((DEBUG_NET, "\t_DI_= 0x%X\n\r", DisplayPointer->Di));\r | |
92 | DEBUG ((DEBUG_NET, "\t_ES_= 0x%X\n\r", DisplayPointer->Es));\r | |
93 | DEBUG ((DEBUG_NET, "\tUNDI_DS= 0x%X\n\r", DisplayPointer->Undi_Ds));\r | |
94 | DEBUG ((DEBUG_NET, "\tUNDI_CS= 0x%X\n\r", DisplayPointer->Undi_Cs));\r | |
95 | DEBUG ((DEBUG_NET, "\tPXEptr:SEG= 0x%X\n\r", (UINT16) DisplayPointer->PXEptr.Segment));\r | |
96 | DEBUG ((DEBUG_NET, "\tPXEptr:OFF= 0x%X\n\r", (UINT16) DisplayPointer->PXEptr.Offset));\r | |
97 | DEBUG ((DEBUG_NET, "\tPXENVptr:SEG= 0x%X\n\r", (UINT16) DisplayPointer->PXENVptr.Segment));\r | |
98 | DEBUG ((DEBUG_NET, "\tPXENVptr:OFF= 0x%X\n\r", (UINT16) DisplayPointer->PXENVptr.Offset));\r | |
99 | }\r | |
100 | \r | |
101 | /**\r | |
102 | Simple table dumper. The ROMID table is necessary in order to effect\r | |
103 | the "Early UNDI" trick. Herein, the UNDI layer can be loaded in the\r | |
0a6f4824 | 104 | pre-boot phase without having to download a Network Boot Program\r |
bcecde14 | 105 | across the wire. It is required in the implementation in that we\r |
106 | are not using PXE.\r | |
107 | \r | |
108 | @param RomIDStructure Point to RomID structure.\r | |
0a6f4824 | 109 | \r |
bcecde14 | 110 | **/\r |
111 | VOID\r | |
112 | Print_ROMID_Table (\r | |
113 | IN VOID *RomIDStructure\r | |
114 | )\r | |
115 | {\r | |
116 | UNDI_ROMID_T *DisplayPointer;\r | |
117 | \r | |
118 | DisplayPointer = (UNDI_ROMID_T *) RomIDStructure;\r | |
119 | \r | |
120 | DEBUG ((DEBUG_NET, "Before Parsing the table contents, the table itself lives\n"));\r | |
121 | DEBUG ((DEBUG_NET, "\tat the address 0x%X\n\r", (UINT32)(UINTN) RomIDStructure));\r | |
122 | \r | |
123 | DEBUG (\r | |
124 | (DEBUG_NET,\r | |
125 | "\n\rROMID %c%c%c%c\n\r",\r | |
126 | DisplayPointer->Signature[0],\r | |
127 | DisplayPointer->Signature[1],\r | |
128 | DisplayPointer->Signature[2],\r | |
129 | DisplayPointer->Signature[3])\r | |
130 | );\r | |
131 | \r | |
132 | DEBUG (\r | |
133 | (DEBUG_NET,\r | |
134 | "Length of this structure in bytes = 0x%X\n\r",\r | |
135 | DisplayPointer->StructLength)\r | |
136 | );\r | |
137 | DEBUG (\r | |
138 | (DEBUG_NET,\r | |
139 | "Use to make byte checksum of this structure == zero is = 0x%X\n\r",\r | |
140 | DisplayPointer->StructCksum)\r | |
141 | );\r | |
142 | DEBUG (\r | |
143 | (DEBUG_NET,\r | |
144 | "Structure format revision number= 0x%X\n\r",\r | |
145 | DisplayPointer->StructRev)\r | |
146 | );\r | |
147 | DEBUG (\r | |
148 | (DEBUG_NET,\r | |
149 | "API Revision number = 0x%X 0x%X 0x%X\n\r",\r | |
150 | DisplayPointer->UNDI_Rev[0],\r | |
151 | DisplayPointer->UNDI_Rev[1],\r | |
152 | DisplayPointer->UNDI_Rev[2])\r | |
153 | );\r | |
154 | DEBUG (\r | |
155 | (DEBUG_NET,\r | |
156 | "Offset of UNDI loader routine in the option ROM image= 0x%X\n\r",\r | |
157 | DisplayPointer->UNDI_Loader)\r | |
158 | );\r | |
159 | DEBUG ((DEBUG_NET, "From the data above, the absolute entry point of the UNDI loader is\n\r"));\r | |
160 | DEBUG (\r | |
161 | (DEBUG_NET,\r | |
162 | "\tat address 0x%X\n\r",\r | |
163 | (UINT32) (DisplayPointer->UNDI_Loader + ((UINT32) (UINTN)(DisplayPointer - 0x20) & 0xFFFF0)))\r | |
164 | );\r | |
165 | DEBUG ((DEBUG_NET, "Minimum stack segment size, in bytes,\n\r"));\r | |
166 | DEBUG (\r | |
167 | (DEBUG_NET,\r | |
168 | "needed to load and run the UNDI= 0x%X \n\r",\r | |
169 | DisplayPointer->StackSize)\r | |
170 | );\r | |
171 | DEBUG (\r | |
172 | (DEBUG_NET,\r | |
173 | "UNDI runtime code and data = 0x%X\n\r",\r | |
174 | DisplayPointer->DataSize)\r | |
175 | );\r | |
176 | DEBUG (\r | |
177 | (DEBUG_NET,\r | |
178 | "Segment size = 0x%X\n\r",\r | |
179 | DisplayPointer->CodeSize)\r | |
180 | );\r | |
181 | DEBUG (\r | |
182 | (DEBUG_NET,\r | |
183 | "\n\rBus Type = %c%c%c%c\n\r",\r | |
184 | DisplayPointer->BusType[0],\r | |
185 | DisplayPointer->BusType[1],\r | |
186 | DisplayPointer->BusType[2],\r | |
187 | DisplayPointer->BusType[3])\r | |
188 | );\r | |
189 | }\r | |
190 | \r | |
191 | /**\r | |
192 | Print PXE table.\r | |
193 | \r | |
194 | @param PxeTable Point to PXE table structure\r | |
0a6f4824 | 195 | \r |
bcecde14 | 196 | **/\r |
197 | VOID\r | |
198 | Print_PXE_Table (\r | |
199 | IN VOID* PxeTable\r | |
200 | )\r | |
201 | {\r | |
202 | PXE_T *DisplayPointer;\r | |
203 | UINTN Index;\r | |
204 | UINT8 *Dptr;\r | |
205 | \r | |
206 | DisplayPointer = (PXE_T *) PxeTable;\r | |
207 | Dptr = (UINT8 *) PxeTable;\r | |
208 | \r | |
209 | DEBUG ((DEBUG_NET, "This is the PXE table at address 0x%X\n\r", PxeTable));\r | |
210 | \r | |
211 | DEBUG ((DEBUG_NET, "A dump of the 0x%X bytes is:\n\r", sizeof (PXE_T)));\r | |
212 | \r | |
213 | for (Index = 0; Index < sizeof (PXE_T); Index++) {\r | |
214 | if ((Index % 0x10) == 0) {\r | |
215 | DEBUG ((DEBUG_NET, "\t\n\r"));\r | |
216 | }\r | |
217 | \r | |
218 | DEBUG ((DEBUG_NET, " 0x%X ", *Dptr++));\r | |
219 | }\r | |
220 | \r | |
221 | DEBUG ((DEBUG_NET, "\n\r"));\r | |
222 | DEBUG (\r | |
223 | (DEBUG_NET,\r | |
224 | "\n\rPXE %c%c%c%c%c%c\n\r",\r | |
225 | DisplayPointer->Signature[0],\r | |
226 | DisplayPointer->Signature[1],\r | |
227 | DisplayPointer->Signature[2],\r | |
228 | DisplayPointer->Signature[3])\r | |
229 | );\r | |
230 | DEBUG (\r | |
231 | (DEBUG_NET,\r | |
232 | "Length of this structure in bytes = 0x%X\n\r",\r | |
233 | DisplayPointer->StructLength)\r | |
234 | );\r | |
235 | DEBUG (\r | |
236 | (DEBUG_NET,\r | |
237 | "Use to make byte checksum of this structure == zero is = 0x%X\n\r",\r | |
238 | DisplayPointer->StructCksum)\r | |
239 | );\r | |
240 | DEBUG (\r | |
241 | (DEBUG_NET,\r | |
242 | "Structure format revision number = 0x%X\n\r",\r | |
243 | DisplayPointer->StructRev)\r | |
244 | );\r | |
245 | DEBUG (\r | |
246 | (DEBUG_NET,\r | |
247 | "Must be zero, is equal to 0x%X\n\r",\r | |
248 | DisplayPointer->Reserved1)\r | |
249 | );\r | |
250 | DEBUG (\r | |
251 | (DEBUG_NET,\r | |
252 | "Far pointer to UNDI ROMID = 0x%X\n\r",\r | |
253 | (UINT32) (DisplayPointer->Undi.Segment << 0x4 | DisplayPointer->Undi.Offset))\r | |
254 | );\r | |
255 | DEBUG (\r | |
256 | (DEBUG_NET,\r | |
257 | "Far pointer to base-code ROMID = 0x%X\n\r",\r | |
258 | (UINT32) ((DisplayPointer->Base.Segment << 0x04) | DisplayPointer->Base.Offset))\r | |
259 | );\r | |
260 | DEBUG ((DEBUG_NET, "16bit stack segment API entry point. This will be seg:off in \n\r"));\r | |
261 | DEBUG (\r | |
262 | (DEBUG_NET,\r | |
263 | "real mode and sel:off in 16:16 protected mode = 0x%X:0x%X\n\r",\r | |
264 | DisplayPointer->EntryPointSP.Segment,\r | |
265 | DisplayPointer->EntryPointSP.Offset)\r | |
266 | );\r | |
267 | \r | |
268 | DEBUG ((DEBUG_NET, "\n\tNOTE to the implementer\n\tThis is the entry to use for call-ins\n\r"));\r | |
269 | \r | |
270 | DEBUG ((DEBUG_NET, "32bit stack Segment API entry point. This will be sel:off. \n\r"));\r | |
271 | DEBUG (\r | |
272 | (DEBUG_NET,\r | |
273 | "In real mode, sel == 0 = 0x%X:0x%X\n\r",\r | |
274 | DisplayPointer->EntryPointESP.Segment,\r | |
275 | DisplayPointer->EntryPointESP.Offset)\r | |
276 | );\r | |
277 | DEBUG (\r | |
278 | (DEBUG_NET,\r | |
279 | "Reserved2 value, must be zero, is equal to 0x%X\n\r",\r | |
280 | DisplayPointer->Reserved2)\r | |
281 | );\r | |
282 | DEBUG (\r | |
283 | (DEBUG_NET,\r | |
284 | "Number of segment descriptors in this structur = 0x%X\n\r",\r | |
285 | (UINT8) DisplayPointer->SegDescCnt)\r | |
286 | );\r | |
287 | DEBUG (\r | |
288 | (DEBUG_NET,\r | |
289 | "First segment descriptor in GDT assigned to PXE = 0x%X\n\r",\r | |
290 | (UINT16) DisplayPointer->FirstSelector)\r | |
291 | );\r | |
292 | DEBUG (\r | |
293 | (DEBUG_NET,\r | |
294 | "The Stack is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",\r | |
295 | (UINT16) DisplayPointer->Stack.Seg_Addr,\r | |
296 | (UINT32) DisplayPointer->Stack.Phy_Addr,\r | |
297 | (UINT16) DisplayPointer->Stack.Seg_Size)\r | |
298 | );\r | |
299 | DEBUG (\r | |
300 | (DEBUG_NET,\r | |
301 | "The UNDIData is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",\r | |
302 | (UINT16) DisplayPointer->UNDIData.Seg_Addr,\r | |
303 | (UINT32) DisplayPointer->UNDIData.Phy_Addr,\r | |
304 | (UINT16) DisplayPointer->UNDIData.Seg_Size)\r | |
305 | );\r | |
306 | DEBUG (\r | |
307 | (DEBUG_NET,\r | |
308 | "The UNDICodeWrite is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",\r | |
309 | (UINT16) DisplayPointer->UNDICode.Seg_Addr,\r | |
310 | (UINT32) DisplayPointer->UNDICode.Phy_Addr,\r | |
311 | (UINT16) DisplayPointer->UNDICode.Seg_Size)\r | |
312 | );\r | |
313 | DEBUG (\r | |
314 | (DEBUG_NET,\r | |
315 | "The Stack is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",\r | |
316 | (UINT16) DisplayPointer->UNDICodeWrite.Seg_Addr,\r | |
317 | (UINT32) DisplayPointer->UNDICodeWrite.Phy_Addr,\r | |
318 | (UINT16) DisplayPointer->UNDICodeWrite.Seg_Size)\r | |
319 | );\r | |
320 | DEBUG (\r | |
321 | (DEBUG_NET,\r | |
322 | "The BC_Data is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",\r | |
323 | (UINT16) DisplayPointer->BC_Data.Seg_Addr,\r | |
324 | (UINT32) DisplayPointer->BC_Data.Phy_Addr,\r | |
325 | (UINT16) DisplayPointer->BC_Data.Seg_Size)\r | |
326 | );\r | |
327 | DEBUG (\r | |
328 | (DEBUG_NET,\r | |
329 | "The BC_Code is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",\r | |
330 | (UINT16) DisplayPointer->BC_Code.Seg_Addr,\r | |
331 | (UINT32) DisplayPointer->BC_Code.Phy_Addr,\r | |
332 | (UINT16) DisplayPointer->BC_Code.Seg_Size)\r | |
333 | );\r | |
334 | DEBUG (\r | |
335 | (DEBUG_NET,\r | |
336 | "The BC_CodeWrite is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",\r | |
337 | (UINT16) DisplayPointer->BC_CodeWrite.Seg_Addr,\r | |
338 | (UINT32) DisplayPointer->BC_CodeWrite.Phy_Addr,\r | |
339 | (UINT16) DisplayPointer->BC_CodeWrite.Seg_Size)\r | |
340 | );\r | |
341 | }\r | |
342 | \r | |
343 | /**\r | |
344 | Print PXENV table.\r | |
345 | \r | |
346 | @param PxenvTable Point to PXENV\r | |
0a6f4824 | 347 | \r |
bcecde14 | 348 | **/\r |
349 | VOID\r | |
350 | Print_PXENV_Table (\r | |
351 | IN VOID *PxenvTable\r | |
352 | )\r | |
353 | {\r | |
354 | PXENV_T *DisplayPointer;\r | |
355 | \r | |
356 | DisplayPointer = (PXENV_T *) PxenvTable;\r | |
357 | \r | |
358 | DEBUG (\r | |
359 | (DEBUG_NET,\r | |
360 | "\n\rPXENV+ %c%c%c%c%c%c\n\r",\r | |
361 | DisplayPointer->Signature[0],\r | |
362 | DisplayPointer->Signature[1],\r | |
363 | DisplayPointer->Signature[2],\r | |
364 | DisplayPointer->Signature[3],\r | |
365 | DisplayPointer->Signature[4],\r | |
366 | DisplayPointer->Signature[5])\r | |
367 | );\r | |
368 | \r | |
369 | DEBUG (\r | |
370 | (DEBUG_NET,\r | |
371 | "PXE version number. \n\r\tLSB is minor version. \n\r\tMSB is major version = 0x%X\n\r",\r | |
372 | DisplayPointer->Version)\r | |
373 | );\r | |
374 | DEBUG (\r | |
375 | (DEBUG_NET,\r | |
376 | "Length of PXE-2.0 Entry Point structure in bytes = 0x%X\n\r",\r | |
377 | DisplayPointer->StructLength)\r | |
378 | );\r | |
379 | DEBUG ((DEBUG_NET, "Used to make structure checksum equal zero is now = 0x%X\n\r", DisplayPointer->StructCksum));\r | |
380 | DEBUG ((DEBUG_NET, "Real mode API entry point segment:Offset. = 0x%X\n\r", DisplayPointer->RMEntry));\r | |
381 | DEBUG ((DEBUG_NET, "Protected mode API entry point = 0x%X\n\r", DisplayPointer->PMEntryOff));\r | |
382 | DEBUG ((DEBUG_NET, " segment:Offset. This will always be zero. \n\r"));\r | |
383 | DEBUG ((DEBUG_NET, "Protected mode API calls = 0x%X\n\r", DisplayPointer->PMEntrySeg));\r | |
384 | DEBUG ((DEBUG_NET, "Real mode stack segment = 0x%X\n\r", DisplayPointer->StackSeg));\r | |
385 | DEBUG ((DEBUG_NET, "Stack segment size in bytes = 0x%X\n\r", DisplayPointer->StackSize));\r | |
386 | DEBUG ((DEBUG_NET, "Real mode base-code code segment = 0x%X\n\r", DisplayPointer->BaseCodeSeg));\r | |
387 | DEBUG ((DEBUG_NET, "Base-code code segment size = 0x%X\n\r", DisplayPointer->BaseCodeSize));\r | |
388 | DEBUG ((DEBUG_NET, "Real mode base-code data segment = 0x%X\n\r", DisplayPointer->BaseDataSeg));\r | |
389 | DEBUG ((DEBUG_NET, "Base-code data segment size = 0x%X\n\r", DisplayPointer->BaseDataSize));\r | |
390 | \r | |
391 | DEBUG (\r | |
392 | (DEBUG_NET,\r | |
393 | "UNDI code segment size in bytes = 0x%X\n\r",\r | |
394 | DisplayPointer->UNDICodeSize)\r | |
395 | );\r | |
396 | DEBUG (\r | |
397 | (DEBUG_NET,\r | |
398 | "Real mode segment:Offset pointer \n\r\tto PXE Runtime ID structure, address = 0x%X\n\r",\r | |
399 | DisplayPointer->RuntimePtr)\r | |
400 | );\r | |
401 | DEBUG (\r | |
402 | (\r | |
403 | DEBUG_NET,\r | |
404 | "From above, we have a linear address of 0x%X\n\r",\r | |
405 | (UINT32)\r | |
406 | (\r | |
407 | ((UINT32)(UINTN)(DisplayPointer->RuntimePtr) & 0xFFFF) +\r | |
408 | (((UINT32)(UINTN)(DisplayPointer->RuntimePtr) & 0xFFFF0000) >> 12)\r | |
409 | )\r | |
410 | )\r | |
411 | );\r | |
412 | }\r | |
413 | \r | |
414 | \r | |
415 | #define OPTION_ROM_PTR ((OPTION_ROM_HEADER *) RomAddress)\r | |
416 | \r | |
417 | /**\r | |
418 | If available, launch the BaseCode from a NIC option ROM.\r | |
419 | This should install the !PXE and PXENV+ structures in memory for\r | |
420 | subsequent use.\r | |
0a6f4824 | 421 | \r |
bcecde14 | 422 | \r |
423 | @param SimpleNetworkDevice Simple network device instance\r | |
424 | @param RomAddress The ROM base address for NIC rom.\r | |
0a6f4824 LG |
425 | \r |
426 | @retval EFI_NOT_FOUND The check sum does not match\r | |
427 | @retval EFI_NOT_FOUND Rom ID offset is wrong\r | |
428 | @retval EFI_NOT_FOUND No Rom ID structure is found\r | |
bcecde14 | 429 | **/\r |
430 | EFI_STATUS\r | |
431 | LaunchBaseCode (\r | |
432 | EFI_SIMPLE_NETWORK_DEV *SimpleNetworkDevice,\r | |
433 | UINTN RomAddress\r | |
434 | )\r | |
435 | {\r | |
436 | EFI_STATUS Status;\r | |
437 | EFI_IA32_REGISTER_SET InOutRegs;\r | |
438 | UNDI_ROMID_T *RomIdTableAddress;\r | |
439 | UNDI_LOADER_T *UndiLoaderTable;\r | |
440 | UINT16 Segment;\r | |
441 | UINT16 *StackPointer;\r | |
442 | VOID *Buffer;\r | |
443 | UINTN Size;\r | |
444 | PXE_T *Pxe;\r | |
445 | UINT32 RomLength;\r | |
446 | UINTN PciSegment;\r | |
447 | UINTN Bus;\r | |
448 | UINTN Device;\r | |
449 | UINTN Function;\r | |
450 | BOOLEAN ThunkFailed;\r | |
451 | \r | |
452 | DEBUG ((DEBUG_NET, "\n\r\n\rCheck for the UNDI ROMID Signature\n\r"));\r | |
453 | \r | |
454 | //\r | |
455 | // paranoia - check structures for validity\r | |
456 | //\r | |
457 | RomLength = OPTION_ROM_PTR->ROMlength << 9;\r | |
458 | if (CalculateSum8 ((UINT8 *) RomAddress, RomLength) != 0) {\r | |
459 | DEBUG ((DEBUG_ERROR, "ROM Header Checksum Error\n\r"));\r | |
460 | return EFI_NOT_FOUND;\r | |
461 | }\r | |
462 | \r | |
463 | RomIdTableAddress = (UNDI_ROMID_T *) (RomAddress + OPTION_ROM_PTR->PxeRomIdOffset);\r | |
464 | \r | |
aa5f60ae | 465 | if (((UINT32)OPTION_ROM_PTR->PxeRomIdOffset + RomIdTableAddress->StructLength) > RomLength) {\r |
bcecde14 | 466 | DEBUG ((DEBUG_ERROR, "ROM ID Offset Error\n\r"));\r |
467 | return EFI_NOT_FOUND;\r | |
468 | }\r | |
469 | //\r | |
470 | // see if this is a header for an UNDI ROM ID structure (vs. a $BC$ or BUSD type)\r | |
471 | //\r | |
472 | if (CompareMem (RomIdTableAddress->Signature, UNDI_ROMID_SIG, sizeof RomIdTableAddress->Signature) != 0) {\r | |
473 | DEBUG ((DEBUG_ERROR, "No ROM ID Structure found....\n\r"));\r | |
474 | return EFI_NOT_FOUND;\r | |
475 | //\r | |
476 | // its not - keep looking\r | |
477 | //\r | |
478 | }\r | |
479 | \r | |
480 | if (CalculateSum8 ((UINT8 *) RomIdTableAddress, RomIdTableAddress->StructLength) != 0) {\r | |
481 | DEBUG ((DEBUG_ERROR, "ROM ID Checksum Error\n\r"));\r | |
482 | return EFI_NOT_FOUND;\r | |
483 | }\r | |
484 | \r | |
485 | Print_ROMID_Table (RomIdTableAddress);\r | |
486 | \r | |
487 | DEBUG (\r | |
488 | (DEBUG_NET,\r | |
489 | "The ROM ID is located at 0x%X\n\r",\r | |
490 | RomIdTableAddress)\r | |
491 | );\r | |
492 | \r | |
493 | DEBUG (\r | |
494 | (DEBUG_NET,\r | |
495 | "With an UNDI Loader located at 0x%X\n\r",\r | |
496 | RomAddress + RomIdTableAddress->UNDI_Loader)\r | |
497 | );\r | |
498 | \r | |
499 | //\r | |
500 | // found an UNDI ROM ID structure\r | |
501 | //\r | |
502 | SimpleNetworkDevice->Nii.ImageAddr = RomAddress;\r | |
503 | SimpleNetworkDevice->Nii.ImageSize = RomLength;\r | |
504 | SimpleNetworkDevice->Nii.MajorVer = RomIdTableAddress->UNDI_Rev[2];\r | |
505 | SimpleNetworkDevice->Nii.MinorVer = RomIdTableAddress->UNDI_Rev[1];\r | |
506 | \r | |
507 | DEBUG ((DEBUG_NET, "Allocate area for the UNDI_LOADER_T structure\n\r"));\r | |
508 | //\r | |
509 | // Allocate 1 page below 1MB to put real mode thunk code in\r | |
510 | //\r | |
511 | // Undi Loader Table is a PXE Specification prescribed data structure\r | |
512 | // that is used to transfer information into and out of the Undi layer.\r | |
513 | // Note how it must be located below 1 MB.\r | |
514 | //\r | |
515 | SimpleNetworkDevice->UndiLoaderTablePages = EFI_SIZE_TO_PAGES (PARAGRAPH_SIZE + sizeof (UNDI_LOADER_T));\r | |
516 | Status = BiosSnp16AllocatePagesBelowOneMb (\r | |
517 | SimpleNetworkDevice->UndiLoaderTablePages,\r | |
518 | &SimpleNetworkDevice->UndiLoaderTable\r | |
519 | );\r | |
520 | if (EFI_ERROR (Status)) {\r | |
521 | DEBUG ((DEBUG_ERROR, "We had a failure in AllocatePages, status code = 0x%X\n", Status));\r | |
522 | return EFI_OUT_OF_RESOURCES;\r | |
523 | }\r | |
524 | \r | |
525 | UndiLoaderTable = SimpleNetworkDevice->UndiLoaderTable;\r | |
526 | \r | |
527 | DEBUG ((DEBUG_NET, "Allocate area for the real-mode stack whose sole purpose\n\r"));\r | |
528 | DEBUG ((DEBUG_NET, "in life right now is to store a SEG:OFFSET combo pair that\n\r"));\r | |
529 | DEBUG ((DEBUG_NET, "points to an Undi_Loader_t table structure\n\r"));\r | |
530 | \r | |
531 | Size = 0x100;\r | |
532 | Status = gBS->AllocatePool (EfiLoaderData, Size, &Buffer);\r | |
533 | if (EFI_ERROR (Status)) {\r | |
534 | return Status;\r | |
535 | }\r | |
536 | //\r | |
537 | // Now we want to put a pointer to the Under Loader Table in our MemPage\r | |
538 | // Buffer. This will be the argument stack for the call into the Undi Loader\r | |
539 | //\r | |
540 | StackPointer = (UINT16 *) Buffer;\r | |
541 | *StackPointer++ = TO_OFFSET (UndiLoaderTable);\r | |
542 | //\r | |
543 | // push the OFFSET\r | |
544 | //\r | |
545 | *StackPointer++ = TO_SEGMENT (UndiLoaderTable);\r | |
546 | //\r | |
547 | // push the SEGMENT\r | |
548 | //\r | |
549 | StackPointer = (UINT16 *) Buffer;\r | |
550 | //\r | |
551 | // reset the stack pointer\r | |
552 | //\r | |
553 | DEBUG (\r | |
554 | (DEBUG_NET,\r | |
555 | "After the fixups, the stack pointer is 0x%X\n\r",\r | |
556 | (UINT64)(UINTN) StackPointer)\r | |
557 | );\r | |
558 | \r | |
559 | //\r | |
560 | // Allocate memory for the Deployed UNDI.\r | |
561 | // The UNDI is essentially telling us how much space it needs, and\r | |
562 | // it is up to the EFI driver to allocate sufficient, boot-time\r | |
563 | // persistent resources for the call\r | |
564 | //\r | |
565 | SimpleNetworkDevice->DestinationDataSegmentPages = EFI_SIZE_TO_PAGES (RomIdTableAddress->DataSize);\r | |
566 | Status = BiosSnp16AllocatePagesBelowOneMb (\r | |
567 | SimpleNetworkDevice->DestinationDataSegmentPages,\r | |
568 | &SimpleNetworkDevice->DestinationDataSegment\r | |
569 | );\r | |
570 | if (EFI_ERROR (Status)) {\r | |
571 | DEBUG ((DEBUG_ERROR, "We had a failure in AllocatePages, status code = 0x%X\n", Status));\r | |
572 | return Status;\r | |
573 | }\r | |
574 | \r | |
575 | UndiLoaderTable->Undi_Ds = (UINT16) ((UINTN) SimpleNetworkDevice->DestinationDataSegment >> 4);\r | |
576 | \r | |
577 | //\r | |
578 | // Allocate memory for the Deployed UNDI stack\r | |
579 | // The UNDI is essentially telling us how much space it needs, and\r | |
580 | // it is up to the EFI driver to allocate sufficient, boot-time\r | |
581 | // persistent resources for the call\r | |
582 | //\r | |
583 | SimpleNetworkDevice->DestinationStackSegmentPages = EFI_SIZE_TO_PAGES (RomIdTableAddress->StackSize);\r | |
584 | Status = BiosSnp16AllocatePagesBelowOneMb (\r | |
585 | SimpleNetworkDevice->DestinationStackSegmentPages,\r | |
586 | &SimpleNetworkDevice->DestinationStackSegment\r | |
587 | );\r | |
588 | if (EFI_ERROR (Status)) {\r | |
589 | DEBUG ((DEBUG_ERROR, "We had a failure in AllocatePages, status code = 0x%X\n", Status));\r | |
590 | return Status;\r | |
591 | }\r | |
592 | //\r | |
593 | // Allocate memory for the Deployed UNDI.\r | |
594 | // The UNDI is essentially telling us how much space it needs, and\r | |
595 | // it is up to the EFI driver to allocate sufficient, boot-time\r | |
596 | // persistent resources for the call\r | |
597 | //\r | |
598 | SimpleNetworkDevice->DestinationCodeSegmentPages = EFI_SIZE_TO_PAGES (RomIdTableAddress->CodeSize);\r | |
599 | Status = BiosSnp16AllocatePagesBelowOneMb (\r | |
600 | SimpleNetworkDevice->DestinationCodeSegmentPages,\r | |
601 | &SimpleNetworkDevice->DestinationCodeSegment\r | |
602 | );\r | |
603 | if (EFI_ERROR (Status)) {\r | |
604 | DEBUG ((DEBUG_ERROR, "We had a failure in AllocatePages, status code = 0x%X\n", Status));\r | |
605 | return Status;\r | |
606 | }\r | |
607 | \r | |
608 | UndiLoaderTable->Undi_Cs = (UINT16) ((UINTN) SimpleNetworkDevice->DestinationCodeSegment >> 4);\r | |
609 | \r | |
610 | //\r | |
611 | // these are in the Input and Output Parameter to be sent to the UNDI Loader code\r | |
612 | //\r | |
613 | UndiLoaderTable->Status = 0xAA55;\r | |
614 | //\r | |
615 | // -------------------- Changed by Michael_Huang@3Com.com -----------------\r | |
616 | // UndiLoaderTable->_AX is AX value when UNDI ROM is initialized by BIOS, it is the PCI bus device\r | |
617 | // function of the NIC. Please refer to PXE Spec for detail info.\r | |
618 | // old code is:\r | |
619 | // UndiLoaderTable->Ax = 0x0;\r | |
620 | // -----------------------------------------------------------------------\r | |
621 | //\r | |
622 | SimpleNetworkDevice->PciIo->GetLocation (\r | |
623 | SimpleNetworkDevice->PciIo,\r | |
624 | &PciSegment,\r | |
625 | &Bus,\r | |
626 | &Device,\r | |
627 | &Function\r | |
628 | );\r | |
629 | UndiLoaderTable->Ax = (UINT16) ((Bus << 0x8) | (Device << 0x3) | (Function));\r | |
630 | UndiLoaderTable->Bx = 0x0;\r | |
631 | UndiLoaderTable->Dx = 0x0;\r | |
632 | UndiLoaderTable->Di = 0x0;\r | |
633 | UndiLoaderTable->Es = 0x0;\r | |
634 | \r | |
635 | //\r | |
636 | // set these OUT values to zero in order to ensure that\r | |
637 | // uninitialized memory is not mistaken for display data\r | |
638 | //\r | |
639 | UndiLoaderTable->PXEptr.Offset = 0;\r | |
640 | UndiLoaderTable->PXEptr.Segment = 0;\r | |
641 | UndiLoaderTable->PXENVptr.Segment = 0;\r | |
642 | UndiLoaderTable->PXENVptr.Offset = 0;\r | |
643 | \r | |
644 | DEBUG (\r | |
645 | (DEBUG_INIT,\r | |
646 | "The NIC is located at Bus 0x%X, Device 0x%X, Function 0x%X\n\r",\r | |
647 | Bus,\r | |
648 | Device,\r | |
649 | Function)\r | |
650 | );\r | |
651 | \r | |
652 | //\r | |
653 | // These are the values that set up the ACTUAL IA32 machine state, whether in\r | |
654 | // Real16 in EFI32 or the IVE for IA64\r | |
655 | // register values are unused except for CS:IP and SS:SP\r | |
656 | //\r | |
657 | InOutRegs.X.AX = 0;\r | |
658 | InOutRegs.X.BX = 0;\r | |
659 | InOutRegs.X.CX = 0;\r | |
660 | InOutRegs.X.DX = 0;\r | |
661 | InOutRegs.X.SI = 0;\r | |
662 | InOutRegs.X.DI = 0;\r | |
663 | InOutRegs.X.BP = 0;\r | |
664 | InOutRegs.X.DS = 0;\r | |
665 | InOutRegs.X.ES = 0;\r | |
666 | //\r | |
667 | // just to be clean\r | |
668 | //\r | |
669 | DEBUG ((DEBUG_NET, "The way this game works is that the SS:SP +4 should point\n\r"));\r | |
670 | DEBUG ((DEBUG_NET, "to the contents of the UndiLoaderTable\n\r"));\r | |
671 | DEBUG (\r | |
672 | (DEBUG_NET,\r | |
673 | "The Undi Loader Table is at address = 0x%X\n\r",\r | |
674 | (UINT32)(UINTN) UndiLoaderTable)\r | |
675 | );\r | |
676 | DEBUG (\r | |
677 | (DEBUG_NET,\r | |
678 | "The segment and offsets are 0x%X and 0x%X, resp\n",\r | |
679 | TO_SEGMENT (UndiLoaderTable),\r | |
680 | TO_OFFSET (UndiLoaderTable))\r | |
681 | );\r | |
682 | \r | |
683 | DEBUG (\r | |
684 | (DEBUG_NET,\r | |
685 | "The Linear Address of the UNDI Loader entry is 0x%X\n",\r | |
686 | RomAddress + RomIdTableAddress->UNDI_Loader)\r | |
687 | );\r | |
688 | \r | |
689 | DEBUG (\r | |
690 | (DEBUG_NET,\r | |
691 | "The Address offset of the UNDI Loader entry is 0x%X\n",\r | |
692 | RomIdTableAddress->UNDI_Loader)\r | |
693 | );\r | |
694 | \r | |
695 | DEBUG ((DEBUG_NET, "Before the call, we have...\n\r"));\r | |
696 | Print_Undi_Loader_Table (UndiLoaderTable);\r | |
697 | \r | |
698 | Segment = ((UINT16) (RShiftU64 (RomAddress, 4) & 0xFFFF));\r | |
699 | DEBUG ((DEBUG_NET, "The Segment of the call is 0x%X\n\r", Segment));\r | |
700 | \r | |
701 | //\r | |
702 | // make the call into the UNDI Code\r | |
703 | //\r | |
704 | DEBUG ((DEBUG_INIT, "Make the call into the UNDI code now\n\r"));\r | |
705 | \r | |
706 | DEBUG ((DEBUG_NET, "\nThe 20-BIt address of the Call, and the location \n\r"));\r | |
707 | DEBUG ((DEBUG_NET, "\twhere we should be able to set a breakpoint is \n\r"));\r | |
708 | DEBUG (\r | |
709 | (DEBUG_NET,\r | |
710 | "\t\t0x%X, from SEG:OFF 0x%X:0x%X\n\r\n\r",\r | |
711 | Segment * 0x10 + RomIdTableAddress->UNDI_Loader,\r | |
712 | Segment,\r | |
713 | RomIdTableAddress->UNDI_Loader)\r | |
714 | );\r | |
715 | \r | |
716 | ThunkFailed = SimpleNetworkDevice->LegacyBios->FarCall86 (\r | |
717 | SimpleNetworkDevice->LegacyBios,\r | |
718 | Segment, // Input segment\r | |
719 | (UINT16) RomIdTableAddress->UNDI_Loader, // Offset\r | |
720 | &InOutRegs, // Ptr to Regs\r | |
721 | Buffer, // Reference to Stack\r | |
722 | Size // Size of the Stack\r | |
723 | );\r | |
724 | if (ThunkFailed) {\r | |
725 | return EFI_ABORTED;\r | |
726 | }\r | |
727 | \r | |
728 | DEBUG (\r | |
729 | (DEBUG_NET,\r | |
730 | "The return code UndiLoaderTable->Status is = 0x%X\n\r",\r | |
731 | UndiLoaderTable->Status)\r | |
732 | );\r | |
733 | DEBUG (\r | |
734 | (DEBUG_NET,\r | |
735 | "This error code should match eax, which is = 0x%X\n\r",\r | |
736 | InOutRegs.X.AX)\r | |
737 | );\r | |
738 | \r | |
9f6c5db2 EL |
739 | if ((UndiLoaderTable->Status != 0) || (InOutRegs.X.AX != PXENV_EXIT_SUCCESS)) {\r |
740 | DEBUG ((DEBUG_NET, "LaunchBaseCode exits with error, RomAddress = 0x%X\n\r", RomAddress));\r | |
741 | return EFI_ABORTED;\r | |
742 | }\r | |
743 | \r | |
bcecde14 | 744 | DEBUG ((DEBUG_NET, "Now returned from the UNDI code\n\r"));\r |
745 | \r | |
746 | DEBUG ((DEBUG_NET, "After the call, we have...\n\r"));\r | |
747 | Print_Undi_Loader_Table (UndiLoaderTable);\r | |
748 | \r | |
749 | DEBUG ((DEBUG_NET, "Display the PXENV+ and !PXE tables exported by NIC\n\r"));\r | |
aa5f60ae HW |
750 | Print_PXENV_Table ((VOID *)(((UINTN)UndiLoaderTable->PXENVptr.Segment << 4) | UndiLoaderTable->PXENVptr.Offset));\r |
751 | Print_PXE_Table ((VOID *)(((UINTN)UndiLoaderTable->PXEptr.Segment << 4) + UndiLoaderTable->PXEptr.Offset));\r | |
bcecde14 | 752 | \r |
aa5f60ae | 753 | Pxe = (PXE_T *)(((UINTN)UndiLoaderTable->PXEptr.Segment << 4) + UndiLoaderTable->PXEptr.Offset);\r |
bcecde14 | 754 | SimpleNetworkDevice->Nii.Id = (UINT64)(UINTN) Pxe;\r |
755 | \r | |
9f6c5db2 EL |
756 | gBS->FreePool (Buffer);\r |
757 | \r | |
bcecde14 | 758 | //\r |
bcecde14 | 759 | // paranoia - make sure a valid !PXE structure\r |
760 | //\r | |
761 | if (CompareMem (Pxe->Signature, PXE_SIG, sizeof Pxe->Signature) != 0) {\r | |
762 | DEBUG ((DEBUG_ERROR, "!PXE Structure not found....\n\r"));\r | |
763 | return EFI_NOT_FOUND;\r | |
764 | //\r | |
765 | // its not - keep looking\r | |
766 | //\r | |
767 | }\r | |
768 | \r | |
769 | if (CalculateSum8 ((UINT8 *) Pxe, Pxe->StructLength) != 0) {\r | |
770 | DEBUG ((DEBUG_ERROR, "!PXE Checksum Error\n\r"));\r | |
771 | return EFI_NOT_FOUND;\r | |
772 | }\r | |
773 | \r | |
774 | if (Pxe->StructLength < (UINT8 *) &Pxe->FirstSelector - (UINT8 *) Pxe->Signature) {\r | |
775 | DEBUG ((DEBUG_ERROR, "!PXE Length Error\n\r"));\r | |
776 | return EFI_NOT_FOUND;\r | |
777 | }\r | |
778 | \r | |
779 | if ((((UINTN) Pxe->Undi.Segment) << 4) + Pxe->Undi.Offset != (UINTN) RomIdTableAddress) {\r | |
780 | DEBUG ((DEBUG_ERROR, "!PXE RomId Address Error\n\r"));\r | |
781 | return EFI_NOT_FOUND;\r | |
782 | }\r | |
783 | //\r | |
784 | // This is the magic to bind the global PXE interface\r | |
785 | // This dirtiness is for non-protocol shrouded access\r | |
786 | //\r | |
787 | SimpleNetworkDevice->PxeEntrySegment = Pxe->EntryPointSP.Segment;\r | |
788 | \r | |
789 | if (SimpleNetworkDevice->PxeEntrySegment == 0) {\r | |
790 | DEBUG ((DEBUG_ERROR, "!PXE EntryPointSP segment Error\n\r"));\r | |
791 | return EFI_NOT_FOUND;\r | |
792 | }\r | |
793 | \r | |
794 | SimpleNetworkDevice->PxeEntryOffset = Pxe->EntryPointSP.Offset;\r | |
795 | \r | |
796 | DEBUG (\r | |
797 | (\r | |
798 | DEBUG_NET, "The entry point is 0x%X:0x%X\n\r", SimpleNetworkDevice->PxeEntrySegment, SimpleNetworkDevice->\r | |
799 | PxeEntryOffset\r | |
800 | )\r | |
801 | );\r | |
802 | \r | |
803 | return EFI_SUCCESS;\r | |
804 | }\r | |
805 | \r | |
806 | /**\r | |
807 | Effect the Far Call into the PXE Layer\r | |
808 | \r | |
809 | Note: When using a 32-bit stack segment do not push 32-bit words onto the stack. The PXE API\r | |
810 | services will not work, unless there are three 16-bit parameters pushed onto the stack.\r | |
811 | push DS ;Far pointer to parameter structure\r | |
812 | push offset pxe_data_call_struct ;is pushed onto stack.\r | |
813 | push Index ;UINT16 is pushed onto stack.\r | |
814 | call dword ptr (s_PXE ptr es:[di]).EntryPointSP\r | |
0a6f4824 | 815 | add sp, 6 ;Caller cleans up stack.\r |
bcecde14 | 816 | \r |
817 | @param SimpleNetworkDevice Device instance for simple network\r | |
818 | @param Table Point to parameter/retun value table for legacy far call\r | |
70d3fe9d | 819 | @param TableSize The size of parameter/return value table\r |
bcecde14 | 820 | @param CallIndex The index of legacy call.\r |
0a6f4824 LG |
821 | \r |
822 | @return EFI_STATUS\r | |
bcecde14 | 823 | **/\r |
824 | EFI_STATUS\r | |
825 | MakePxeCall (\r | |
826 | EFI_SIMPLE_NETWORK_DEV *SimpleNetworkDevice,\r | |
827 | IN OUT VOID *Table,\r | |
828 | IN UINTN TableSize,\r | |
829 | IN UINT16 CallIndex\r | |
830 | )\r | |
831 | {\r | |
832 | EFI_STATUS Status;\r | |
833 | EFI_IA32_REGISTER_SET InOutRegs;\r | |
834 | UINT16 *BPtr;\r | |
835 | VOID *Buffer;\r | |
836 | UINTN Size;\r | |
837 | VOID *MemPageAddress;\r | |
838 | UINTN Index;\r | |
839 | BOOLEAN ThunkFailed;\r | |
840 | \r | |
841 | DEBUG ((DEBUG_NET, "MakePxeCall(CallIndex = %02x, Table = %X, TableSize = %d)\n", CallIndex, Table, TableSize));\r | |
842 | \r | |
843 | if (SimpleNetworkDevice->PxeEntrySegment == 0 && SimpleNetworkDevice->PxeEntryOffset == 0) {\r | |
844 | return EFI_DEVICE_ERROR;\r | |
845 | }\r | |
846 | \r | |
847 | Status = EFI_SUCCESS;\r | |
848 | \r | |
849 | //\r | |
850 | // Allocate a transient data structure for the argument table\r | |
851 | // This table needs to have the input XXX_t structure copied into here.\r | |
852 | // The PXE UNDI can only grab this table when it's below one-MB, and\r | |
853 | // this implementation will not try to push this table on the stack\r | |
854 | // (although this is a possible optimization path since EFI always allocates\r | |
855 | // 4K as a minimum page size...............)\r | |
856 | //\r | |
857 | Status = BiosSnp16AllocatePagesBelowOneMb (\r | |
858 | TableSize / EFI_PAGE_SIZE + 1,\r | |
859 | &MemPageAddress\r | |
860 | );\r | |
861 | if (EFI_ERROR (Status)) {\r | |
862 | DEBUG ((DEBUG_ERROR, "We had a failure in AllocatePages, status code = 0x%X\n", Status));\r | |
863 | return Status;\r | |
864 | }\r | |
865 | //\r | |
866 | // Copy the > 1MB pool table to a sub-1MB buffer\r | |
867 | //\r | |
868 | CopyMem (MemPageAddress, Table, TableSize);\r | |
869 | \r | |
870 | //\r | |
871 | // Allocate space for IA-32 register context\r | |
872 | //\r | |
873 | ZeroMem (&InOutRegs, sizeof (InOutRegs));\r | |
874 | InOutRegs.X.ES = SimpleNetworkDevice->PxeEntrySegment;\r | |
875 | InOutRegs.X.DI = SimpleNetworkDevice->PxeEntryOffset;\r | |
876 | \r | |
877 | //\r | |
878 | // The game here is to build the stack which will subsequently\r | |
879 | // get copied down below 1 MB by the FarCall primitive.\r | |
880 | // This is now our working stack\r | |
881 | //\r | |
882 | Size = 6;\r | |
883 | Status = gBS->AllocatePool (\r | |
884 | EfiRuntimeServicesData,\r | |
885 | Size,\r | |
886 | &Buffer\r | |
887 | );\r | |
888 | if (EFI_ERROR (Status)) {\r | |
889 | return Status;\r | |
890 | }\r | |
891 | \r | |
892 | BPtr = (UINT16 *) Buffer;\r | |
893 | *BPtr++ = CallIndex;\r | |
894 | //\r | |
895 | // SP + 2\r | |
896 | //\r | |
897 | *BPtr++ = TO_OFFSET (MemPageAddress);\r | |
898 | *BPtr++ = TO_SEGMENT (MemPageAddress);\r | |
899 | \r | |
900 | DEBUG ((DEBUG_NET, "State before FarCall86\n"));\r | |
901 | DEBUG ((DEBUG_NET, "The Buffer is at 0x%X\n\r", Buffer));\r | |
902 | BPtr = (UINT16 *) Buffer;\r | |
903 | DEBUG ((DEBUG_NET, " Buffer = %04X %04X %04X", *BPtr, *(BPtr + 1), *(BPtr + 2)));\r | |
904 | DEBUG ((DEBUG_NET, " MemPage = "));\r | |
905 | for (Index = 0; Index < TableSize; Index++) {\r | |
906 | DEBUG ((DEBUG_NET, " %02x", *((UINT8 *) MemPageAddress + Index)));\r | |
907 | }\r | |
908 | \r | |
909 | DEBUG ((DEBUG_NET, "\n"));\r | |
910 | \r | |
911 | ThunkFailed = SimpleNetworkDevice->LegacyBios->FarCall86 (\r | |
912 | SimpleNetworkDevice->LegacyBios,\r | |
913 | SimpleNetworkDevice->PxeEntrySegment, // Input segment\r | |
914 | SimpleNetworkDevice->PxeEntryOffset,\r | |
915 | &InOutRegs, // Ptr to Regs\r | |
916 | Buffer, // Reference to Stack\r | |
917 | 6 // Size of the Stack\r | |
918 | );\r | |
919 | if (ThunkFailed) {\r | |
920 | return EFI_ABORTED;\r | |
921 | }\r | |
922 | \r | |
923 | DEBUG ((DEBUG_NET, "State after FarCall86\n"));\r | |
924 | DEBUG ((DEBUG_NET, "The Buffer is at 0x%X\n\r", Buffer));\r | |
925 | BPtr = (UINT16 *) Buffer;\r | |
926 | DEBUG ((DEBUG_NET, " Buffer = %04X %04X %04X", *BPtr, *(BPtr + 1), *(BPtr + 2)));\r | |
927 | DEBUG ((DEBUG_NET, " MemPage = "));\r | |
928 | for (Index = 0; Index < TableSize; Index++) {\r | |
929 | DEBUG ((DEBUG_NET, " %02x", *((UINT8 *) MemPageAddress + Index)));\r | |
930 | }\r | |
931 | \r | |
932 | DEBUG ((DEBUG_NET, "\n"));\r | |
933 | \r | |
934 | //\r | |
935 | // Copy the sub 1MB table to > 1MB table\r | |
936 | //\r | |
937 | CopyMem (Table, MemPageAddress, TableSize);\r | |
938 | \r | |
939 | //\r | |
940 | // For PXE UNDI call, AX contains the return status.\r | |
941 | // Convert the PXE UNDI Status to EFI_STATUS type\r | |
942 | //\r | |
943 | if (InOutRegs.X.AX == PXENV_EXIT_SUCCESS) {\r | |
944 | Status = EFI_SUCCESS;\r | |
945 | } else {\r | |
946 | Status = EFI_DEVICE_ERROR;\r | |
947 | }\r | |
948 | //\r | |
949 | // Clean up house\r | |
950 | //\r | |
951 | gBS->FreePool (Buffer);\r | |
952 | gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) MemPageAddress, TableSize / EFI_PAGE_SIZE + 1);\r | |
953 | \r | |
954 | return Status;\r | |
955 | }\r |