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770bcbb6 | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | CpuIo.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | This is the code that publishes the CPU I/O Protocol.\r | |
19 | The intent herein is to have a single I/O service that can load\r | |
20 | as early as possible, extend into runtime, and be layered upon by \r | |
21 | the implementations of architectural protocols and the PCI Root\r | |
22 | Bridge I/O Protocol.\r | |
23 | \r | |
24 | --*/\r | |
25 | \r | |
26 | //\r | |
27 | // Include common header file for this module.\r | |
28 | //\r | |
29 | #include "CommonHeader.h"\r | |
30 | \r | |
31 | #include <CpuDriver.h>\r | |
32 | \r | |
33 | #define IA32_MAX_IO_ADDRESS 0xFFFF\r | |
34 | #define IA32_MAX_MEM_ADDRESS 0xFFFFFFFF\r | |
35 | \r | |
36 | EFI_CPU_IO_PROTOCOL mCpuIoProtocol;\r | |
37 | \r | |
38 | EFI_STATUS\r | |
39 | CpuIoCheckAddressRange (\r | |
40 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
41 | IN UINT64 Address,\r | |
42 | IN UINTN Count,\r | |
43 | IN VOID *Buffer,\r | |
44 | IN UINT64 Limit\r | |
45 | );\r | |
46 | \r | |
47 | EFI_STATUS\r | |
48 | EFIAPI\r | |
49 | CpuMemoryServiceRead (\r | |
50 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
51 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
52 | IN UINT64 Address,\r | |
53 | IN UINTN Count,\r | |
54 | IN OUT VOID *Buffer\r | |
55 | )\r | |
56 | /*++\r | |
57 | \r | |
58 | Routine Description:\r | |
59 | \r | |
60 | Perform the Memory Access Read service for the CPU I/O Protocol\r | |
61 | \r | |
62 | Arguments:\r | |
63 | \r | |
64 | Pointer to an instance of the CPU I/O Protocol\r | |
65 | Width of the Memory Access\r | |
66 | Address of the Memory access\r | |
67 | Count of the number of accesses to perform\r | |
68 | Pointer to the buffer to read or write from memory\r | |
69 | \r | |
70 | Returns:\r | |
71 | \r | |
72 | Status\r | |
73 | \r | |
74 | EFI_SUCCESS - The data was read from or written to the EFI \r | |
75 | System.\r | |
76 | EFI_INVALID_PARAMETER - Width is invalid for this EFI System.\r | |
77 | EFI_INVALID_PARAMETER - Buffer is NULL.\r | |
78 | EFI_UNSUPPORTED - The Buffer is not aligned for the given Width.\r | |
79 | EFI_UNSUPPORTED - The address range specified by Address, Width, \r | |
80 | and Count is not valid for this EFI System.\r | |
81 | \r | |
82 | --*/\r | |
83 | // TODO: This - add argument and description to function comment\r | |
84 | {\r | |
85 | EFI_STATUS Status;\r | |
86 | \r | |
87 | if (!Buffer) {\r | |
88 | return EFI_INVALID_PARAMETER;\r | |
89 | }\r | |
90 | \r | |
91 | Status = CpuIoCheckAddressRange (Width, Address, Count, Buffer, IA32_MAX_MEM_ADDRESS);\r | |
92 | if (EFI_ERROR (Status)) {\r | |
93 | return Status;\r | |
94 | }\r | |
95 | \r | |
96 | //\r | |
97 | // Do nothing for Nt32 version\r | |
98 | //\r | |
99 | return EFI_SUCCESS;\r | |
100 | }\r | |
101 | \r | |
102 | EFI_STATUS\r | |
103 | EFIAPI\r | |
104 | CpuMemoryServiceWrite (\r | |
105 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
106 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
107 | IN UINT64 Address,\r | |
108 | IN UINTN Count,\r | |
109 | IN OUT VOID *Buffer\r | |
110 | )\r | |
111 | /*++\r | |
112 | \r | |
113 | Routine Description:\r | |
114 | \r | |
115 | Perform the Memory Access Read service for the CPU I/O Protocol\r | |
116 | \r | |
117 | Arguments:\r | |
118 | \r | |
119 | Pointer to an instance of the CPU I/O Protocol\r | |
120 | Width of the Memory Access\r | |
121 | Address of the Memory access\r | |
122 | Count of the number of accesses to perform\r | |
123 | Pointer to the buffer to read or write from memory\r | |
124 | \r | |
125 | Returns:\r | |
126 | \r | |
127 | Status\r | |
128 | \r | |
129 | EFI_SUCCESS - The data was read from or written to the EFI System.\r | |
130 | EFI_INVALID_PARAMETER - Width is invalid for this EFI System.\r | |
131 | EFI_INVALID_PARAMETER - Buffer is NULL.\r | |
132 | EFI_UNSUPPORTED - The Buffer is not aligned for the given Width.\r | |
133 | EFI_UNSUPPORTED - The address range specified by Address, Width, and \r | |
134 | Count is not valid for this EFI System.\r | |
135 | \r | |
136 | --*/\r | |
137 | // TODO: This - add argument and description to function comment\r | |
138 | {\r | |
139 | EFI_STATUS Status;\r | |
140 | \r | |
141 | if (!Buffer) {\r | |
142 | return EFI_INVALID_PARAMETER;\r | |
143 | }\r | |
144 | \r | |
145 | Status = CpuIoCheckAddressRange (Width, Address, Count, Buffer, IA32_MAX_MEM_ADDRESS);\r | |
146 | if (EFI_ERROR (Status)) {\r | |
147 | return Status;\r | |
148 | }\r | |
149 | \r | |
150 | //\r | |
151 | // Do nothing for Nt32 version\r | |
152 | //\r | |
153 | return EFI_SUCCESS;\r | |
154 | }\r | |
155 | \r | |
156 | EFI_STATUS\r | |
157 | EFIAPI\r | |
158 | CpuIoServiceRead (\r | |
159 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
160 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
161 | IN UINT64 UserAddress,\r | |
162 | IN UINTN Count,\r | |
163 | IN OUT VOID *UserBuffer\r | |
164 | )\r | |
165 | /*++\r | |
166 | \r | |
167 | Routine Description:\r | |
168 | \r | |
169 | This is the service that implements the I/O read\r | |
170 | \r | |
171 | Arguments:\r | |
172 | \r | |
173 | Pointer to an instance of the CPU I/O Protocol\r | |
174 | Width of the Memory Access\r | |
175 | Address of the I/O access\r | |
176 | Count of the number of accesses to perform\r | |
177 | Pointer to the buffer to read or write from I/O space\r | |
178 | \r | |
179 | Returns:\r | |
180 | \r | |
181 | Status\r | |
182 | EFI_SUCCESS - The data was read from or written to the EFI System.\r | |
183 | EFI_INVALID_PARAMETER - Width is invalid for this EFI System.\r | |
184 | EFI_INVALID_PARAMETER - Buffer is NULL.\r | |
185 | EFI_UNSUPPORTED - The Buffer is not aligned for the given Width.\r | |
186 | EFI_UNSUPPORTED - The address range specified by Address, Width, and \r | |
187 | Count is not valid for this EFI System.\r | |
188 | --*/\r | |
189 | // TODO: This - add argument and description to function comment\r | |
190 | // TODO: UserAddress - add argument and description to function comment\r | |
191 | // TODO: UserBuffer - add argument and description to function comment\r | |
192 | {\r | |
193 | UINTN Address;\r | |
194 | EFI_STATUS Status;\r | |
195 | \r | |
196 | if (!UserBuffer) {\r | |
197 | return EFI_INVALID_PARAMETER;\r | |
198 | }\r | |
199 | \r | |
200 | Address = (UINTN) UserAddress;\r | |
201 | \r | |
202 | if (Width >= EfiCpuIoWidthMaximum) {\r | |
203 | return EFI_INVALID_PARAMETER;\r | |
204 | }\r | |
205 | \r | |
206 | Status = CpuIoCheckAddressRange (Width, Address, Count, UserBuffer, IA32_MAX_IO_ADDRESS);\r | |
207 | if (EFI_ERROR (Status)) {\r | |
208 | return Status;\r | |
209 | }\r | |
210 | \r | |
211 | //\r | |
212 | // Do nothing for Nt32 version\r | |
213 | //\r | |
214 | return EFI_SUCCESS;\r | |
215 | }\r | |
216 | \r | |
217 | EFI_STATUS\r | |
218 | EFIAPI\r | |
219 | CpuIoServiceWrite (\r | |
220 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
221 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
222 | IN UINT64 UserAddress,\r | |
223 | IN UINTN Count,\r | |
224 | IN OUT VOID *UserBuffer\r | |
225 | )\r | |
226 | /*++\r | |
227 | \r | |
228 | Routine Description:\r | |
229 | \r | |
230 | \r | |
231 | This is the service that implements the I/O Write\r | |
232 | \r | |
233 | Arguments:\r | |
234 | \r | |
235 | Pointer to an instance of the CPU I/O Protocol\r | |
236 | Width of the Memory Access\r | |
237 | Address of the I/O access\r | |
238 | Count of the number of accesses to perform\r | |
239 | Pointer to the buffer to read or write from I/O space\r | |
240 | \r | |
241 | Returns:\r | |
242 | \r | |
243 | Status\r | |
244 | \r | |
245 | Status\r | |
246 | EFI_SUCCESS - The data was read from or written to the EFI System.\r | |
247 | EFI_INVALID_PARAMETER - Width is invalid for this EFI System.\r | |
248 | EFI_INVALID_PARAMETER - Buffer is NULL.\r | |
249 | EFI_UNSUPPORTED - The Buffer is not aligned for the given Width.\r | |
250 | EFI_UNSUPPORTED - The address range specified by Address, Width, and \r | |
251 | Count is not valid for this EFI System.\r | |
252 | \r | |
253 | --*/\r | |
254 | // TODO: This - add argument and description to function comment\r | |
255 | // TODO: UserAddress - add argument and description to function comment\r | |
256 | // TODO: UserBuffer - add argument and description to function comment\r | |
257 | {\r | |
258 | UINTN Address;\r | |
259 | EFI_STATUS Status;\r | |
260 | \r | |
261 | if (!UserBuffer) {\r | |
262 | return EFI_INVALID_PARAMETER;\r | |
263 | }\r | |
264 | \r | |
265 | Address = (UINTN) UserAddress;\r | |
266 | \r | |
267 | if (Width >= EfiCpuIoWidthMaximum) {\r | |
268 | return EFI_INVALID_PARAMETER;\r | |
269 | }\r | |
270 | \r | |
271 | Status = CpuIoCheckAddressRange (Width, Address, Count, UserBuffer, IA32_MAX_IO_ADDRESS);\r | |
272 | if (EFI_ERROR (Status)) {\r | |
273 | return Status;\r | |
274 | }\r | |
275 | \r | |
276 | //\r | |
277 | // Do nothing for Nt32 version\r | |
278 | //\r | |
279 | return EFI_SUCCESS;\r | |
280 | }\r | |
281 | \r | |
282 | \r | |
283 | EFI_STATUS\r | |
284 | CpuIoCheckAddressRange (\r | |
285 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
286 | IN UINT64 Address,\r | |
287 | IN UINTN Count,\r | |
288 | IN VOID *Buffer,\r | |
289 | IN UINT64 Limit\r | |
290 | )\r | |
291 | /*++\r | |
292 | \r | |
293 | Routine Description:\r | |
294 | \r | |
295 | TODO: Add function description\r | |
296 | \r | |
297 | Arguments:\r | |
298 | \r | |
299 | Width - TODO: add argument description\r | |
300 | Address - TODO: add argument description\r | |
301 | Count - TODO: add argument description\r | |
302 | Buffer - TODO: add argument description\r | |
303 | Limit - TODO: add argument description\r | |
304 | \r | |
305 | Returns:\r | |
306 | \r | |
307 | EFI_UNSUPPORTED - TODO: Add description for return value\r | |
308 | EFI_UNSUPPORTED - TODO: Add description for return value\r | |
309 | EFI_UNSUPPORTED - TODO: Add description for return value\r | |
310 | EFI_SUCCESS - TODO: Add description for return value\r | |
311 | \r | |
312 | --*/\r | |
313 | {\r | |
314 | UINTN AlignMask;\r | |
315 | \r | |
316 | if (Address > Limit) {\r | |
317 | return EFI_UNSUPPORTED;\r | |
318 | }\r | |
319 | \r | |
320 | //\r | |
321 | // For FiFo type, the target address won't increase during the access, so treat count as 1\r | |
322 | //\r | |
323 | if (Width >= EfiCpuIoWidthFifoUint8 && Width <= EfiCpuIoWidthFifoUint64) {\r | |
324 | Count = 1;\r | |
325 | }\r | |
326 | \r | |
327 | Width = Width & 0x03;\r | |
328 | if (Address - 1 + (1 << Width) * Count > Limit) {\r | |
329 | return EFI_UNSUPPORTED;\r | |
330 | }\r | |
331 | \r | |
332 | AlignMask = (1 << Width) - 1;\r | |
333 | if ((UINTN) Buffer & AlignMask) {\r | |
334 | return EFI_UNSUPPORTED;\r | |
335 | }\r | |
336 | \r | |
337 | return EFI_SUCCESS;\r | |
338 | }\r | |
339 | \r | |
340 | \r |