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1 | /** @file\r |
2 | QNC Smm Library Services that implements SMM Region access, S/W SMI generation and detection.\r | |
3 | \r | |
4 | Copyright (c) 2013-2015 Intel Corporation.\r | |
5 | \r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | \r | |
17 | #include <Base.h>\r | |
18 | #include <IntelQNCRegs.h>\r | |
19 | #include <Library/DebugLib.h>\r | |
20 | #include <Library/PcdLib.h>\r | |
21 | #include <Library/IoLib.h>\r | |
22 | #include <Uefi/UefiBaseType.h>\r | |
23 | #include <Library/QNCAccessLib.h>\r | |
24 | \r | |
25 | #define BOOT_SERVICE_SOFTWARE_SMI_DATA 0\r | |
26 | #define RUNTIME_SOFTWARE_SMI_DATA 1\r | |
27 | \r | |
28 | /**\r | |
29 | Triggers a run time or boot time SMI.\r | |
30 | \r | |
31 | This function triggers a software SMM interrupt and set the APMC status with an 8-bit Data.\r | |
32 | \r | |
33 | @param Data The value to set the APMC status.\r | |
34 | \r | |
35 | **/\r | |
36 | VOID\r | |
37 | InternalTriggerSmi (\r | |
38 | IN UINT8 Data\r | |
39 | )\r | |
40 | {\r | |
9b6bbcdb MK |
41 | UINT16 GPE0BLK_Base;\r |
42 | UINT32 NewValue;\r | |
43 | \r | |
44 | //\r | |
8f7c4375 | 45 | // Get GPE0BLK_Base\r |
9b6bbcdb | 46 | //\r |
9b6bbcdb MK |
47 | GPE0BLK_Base = (UINT16)(LpcPciCfg32 (R_QNC_LPC_GPE0BLK) & 0xFFFF);\r |
48 | \r | |
49 | \r | |
50 | //\r | |
51 | // Enable APM SMI\r | |
52 | //\r | |
53 | IoOr32 ((GPE0BLK_Base + R_QNC_GPE0BLK_SMIE), B_QNC_GPE0BLK_SMIE_APM);\r | |
54 | \r | |
55 | //\r | |
56 | // Enable SMI globally\r | |
57 | //\r | |
58 | NewValue = QNCPortRead (QUARK_NC_HOST_BRIDGE_SB_PORT_ID, QNC_MSG_FSBIC_REG_HMISC);\r | |
59 | NewValue |= SMI_EN;\r | |
60 | QNCPortWrite (QUARK_NC_HOST_BRIDGE_SB_PORT_ID, QNC_MSG_FSBIC_REG_HMISC, NewValue);\r | |
61 | \r | |
62 | //\r | |
63 | // Set APM_STS\r | |
64 | //\r | |
65 | IoWrite8 (PcdGet16 (PcdSmmDataPort), Data);\r | |
66 | \r | |
67 | //\r | |
68 | // Generate the APM SMI\r | |
69 | //\r | |
70 | IoWrite8 (PcdGet16 (PcdSmmActivationPort), PcdGet8 (PcdSmmActivationData));\r | |
71 | \r | |
72 | //\r | |
73 | // Clear the APM SMI Status Bit\r | |
74 | //\r | |
75 | IoWrite32 ((GPE0BLK_Base + R_QNC_GPE0BLK_SMIS), B_QNC_GPE0BLK_SMIS_APM);\r | |
76 | \r | |
77 | //\r | |
78 | // Set the EOS Bit\r | |
79 | //\r | |
80 | IoOr32 ((GPE0BLK_Base + R_QNC_GPE0BLK_SMIS), B_QNC_GPE0BLK_SMIS_EOS);\r | |
81 | }\r | |
82 | \r | |
83 | \r | |
84 | /**\r | |
85 | Triggers an SMI at boot time.\r | |
86 | \r | |
87 | This function triggers a software SMM interrupt at boot time.\r | |
88 | \r | |
89 | **/\r | |
90 | VOID\r | |
91 | EFIAPI\r | |
92 | TriggerBootServiceSoftwareSmi (\r | |
93 | VOID\r | |
94 | )\r | |
95 | {\r | |
96 | InternalTriggerSmi (BOOT_SERVICE_SOFTWARE_SMI_DATA);\r | |
97 | }\r | |
98 | \r | |
99 | \r | |
100 | /**\r | |
101 | Triggers an SMI at run time.\r | |
102 | \r | |
103 | This function triggers a software SMM interrupt at run time.\r | |
104 | \r | |
105 | **/\r | |
106 | VOID\r | |
107 | EFIAPI\r | |
108 | TriggerRuntimeSoftwareSmi (\r | |
109 | VOID\r | |
110 | )\r | |
111 | {\r | |
112 | InternalTriggerSmi (RUNTIME_SOFTWARE_SMI_DATA);\r | |
113 | }\r | |
114 | \r | |
115 | \r | |
116 | /**\r | |
117 | Gets the software SMI data.\r | |
118 | \r | |
119 | This function tests if a software SMM interrupt happens. If a software SMI happens,\r | |
120 | it retrieves the SMM data and returns it as a non-negative value; otherwise a negative\r | |
121 | value is returned.\r | |
122 | \r | |
123 | @return Data The data retrieved from SMM data port in case of a software SMI;\r | |
124 | otherwise a negative value.\r | |
125 | \r | |
126 | **/\r | |
127 | INTN\r | |
128 | InternalGetSwSmiData (\r | |
129 | VOID\r | |
130 | )\r | |
131 | {\r | |
132 | UINT8 SmiStatus;\r | |
133 | UINT8 Data;\r | |
134 | \r | |
135 | SmiStatus = IoRead8 ((UINT16)(LpcPciCfg32 (R_QNC_LPC_GPE0BLK) & 0xFFFF) + R_QNC_GPE0BLK_SMIS);\r | |
136 | if (((SmiStatus & B_QNC_GPE0BLK_SMIS_APM) != 0) &&\r | |
137 | (IoRead8 (PcdGet16 (PcdSmmActivationPort)) == PcdGet8 (PcdSmmActivationData))) {\r | |
138 | Data = IoRead8 (PcdGet16 (PcdSmmDataPort));\r | |
139 | return (INTN)(UINTN)Data;\r | |
140 | }\r | |
141 | \r | |
142 | return -1;\r | |
143 | }\r | |
144 | \r | |
145 | \r | |
146 | /**\r | |
147 | Test if a boot time software SMI happened.\r | |
148 | \r | |
149 | This function tests if a software SMM interrupt happened. If a software SMM interrupt happened and\r | |
150 | it was triggered at boot time, it returns TRUE. Otherwise, it returns FALSE.\r | |
151 | \r | |
152 | @retval TRUE A software SMI triggered at boot time happened.\r | |
153 | @retval FLASE No software SMI happened or the software SMI was triggered at run time.\r | |
154 | \r | |
155 | **/\r | |
156 | BOOLEAN\r | |
157 | EFIAPI\r | |
158 | IsBootServiceSoftwareSmi (\r | |
159 | VOID\r | |
160 | )\r | |
161 | {\r | |
162 | return (BOOLEAN) (InternalGetSwSmiData () == BOOT_SERVICE_SOFTWARE_SMI_DATA);\r | |
163 | }\r | |
164 | \r | |
165 | \r | |
166 | /**\r | |
167 | Test if a run time software SMI happened.\r | |
168 | \r | |
169 | This function tests if a software SMM interrupt happened. If a software SMM interrupt happened and\r | |
170 | it was triggered at run time, it returns TRUE. Otherwise, it returns FALSE.\r | |
171 | \r | |
172 | @retval TRUE A software SMI triggered at run time happened.\r | |
173 | @retval FLASE No software SMI happened or the software SMI was triggered at boot time.\r | |
174 | \r | |
175 | **/\r | |
176 | BOOLEAN\r | |
177 | EFIAPI\r | |
178 | IsRuntimeSoftwareSmi (\r | |
179 | VOID\r | |
180 | )\r | |
181 | {\r | |
182 | return (BOOLEAN) (InternalGetSwSmiData () == RUNTIME_SOFTWARE_SMI_DATA);\r | |
183 | }\r | |
184 | \r | |
185 | \r | |
186 | \r | |
187 | /**\r | |
188 | \r | |
189 | Clear APM SMI Status Bit; Set the EOS bit.\r | |
190 | \r | |
191 | **/\r | |
192 | VOID\r | |
193 | EFIAPI\r | |
194 | ClearSmi (\r | |
195 | VOID\r | |
196 | )\r | |
197 | {\r | |
198 | \r | |
199 | UINT16 GPE0BLK_Base;\r | |
200 | \r | |
201 | //\r | |
202 | // Get GpeBase\r | |
203 | //\r | |
204 | GPE0BLK_Base = (UINT16)(LpcPciCfg32 (R_QNC_LPC_GPE0BLK) & 0xFFFF);\r | |
205 | \r | |
206 | //\r | |
207 | // Clear the APM SMI Status Bit\r | |
208 | //\r | |
209 | IoOr16 (GPE0BLK_Base + R_QNC_GPE0BLK_SMIS, B_QNC_GPE0BLK_SMIS_APM);\r | |
210 | \r | |
211 | //\r | |
212 | // Set the EOS Bit\r | |
213 | //\r | |
214 | IoOr32 (GPE0BLK_Base + R_QNC_GPE0BLK_SMIS, B_QNC_GPE0BLK_SMIS_EOS);\r | |
215 | }\r | |
216 | \r | |
217 | /**\r | |
218 | This routine is the chipset code that accepts a request to "open" a region of SMRAM.\r | |
219 | The region could be legacy ABSEG, HSEG, or TSEG near top of physical memory.\r | |
220 | The use of "open" means that the memory is visible from all boot-service\r | |
221 | and SMM agents.\r | |
222 | \r | |
223 | @retval FALSE Cannot open a locked SMRAM region\r | |
224 | @retval TRUE Success to open SMRAM region.\r | |
225 | **/\r | |
226 | BOOLEAN\r | |
227 | EFIAPI\r | |
228 | QNCOpenSmramRegion (\r | |
229 | VOID\r | |
230 | )\r | |
231 | {\r | |
232 | UINT32 Smram;\r | |
233 | \r | |
234 | // Read the SMRAM register\r | |
235 | Smram = QncHsmmcRead ();\r | |
236 | \r | |
237 | //\r | |
238 | // Is the platform locked?\r | |
239 | //\r | |
240 | if (Smram & SMM_LOCKED) {\r | |
241 | // Cannot Open a locked region\r | |
242 | DEBUG ((EFI_D_WARN, "Cannot open a locked SMRAM region\n"));\r | |
243 | return FALSE;\r | |
244 | }\r | |
245 | \r | |
246 | //\r | |
247 | // Open all SMRAM regions for Host access only\r | |
248 | //\r | |
249 | Smram |= (SMM_WRITE_OPEN | SMM_READ_OPEN); // Open for Host.\r | |
250 | Smram &= ~(NON_HOST_SMM_WR_OPEN | NON_HOST_SMM_RD_OPEN); // Not for others.\r | |
251 | \r | |
252 | //\r | |
253 | // Write the SMRAM register\r | |
254 | //\r | |
255 | QncHsmmcWrite (Smram);\r | |
256 | \r | |
257 | return TRUE;\r | |
258 | }\r | |
259 | \r | |
260 | /**\r | |
261 | This routine is the chipset code that accepts a request to "close" a region of SMRAM.\r | |
262 | The region could be legacy AB or TSEG near top of physical memory.\r | |
263 | The use of "close" means that the memory is only visible from SMM agents,\r | |
264 | not from BS or RT code.\r | |
265 | \r | |
266 | @retval FALSE Cannot open a locked SMRAM region\r | |
267 | @retval TRUE Success to open SMRAM region.\r | |
268 | **/\r | |
269 | BOOLEAN\r | |
270 | EFIAPI\r | |
271 | QNCCloseSmramRegion (\r | |
272 | VOID\r | |
273 | )\r | |
274 | {\r | |
275 | UINT32 Smram;\r | |
276 | \r | |
277 | // Read the SMRAM register.\r | |
278 | Smram = QncHsmmcRead ();\r | |
279 | \r | |
280 | //\r | |
281 | // Is the platform locked?\r | |
282 | //\r | |
283 | if(Smram & SMM_LOCKED) {\r | |
284 | // Cannot Open a locked region\r | |
285 | DEBUG ((EFI_D_WARN, "Cannot close a locked SMRAM region\n"));\r | |
286 | return FALSE;\r | |
287 | }\r | |
288 | \r | |
289 | Smram &= (~(SMM_WRITE_OPEN | SMM_READ_OPEN | NON_HOST_SMM_WR_OPEN | NON_HOST_SMM_RD_OPEN));\r | |
290 | \r | |
291 | QncHsmmcWrite (Smram);\r | |
292 | \r | |
293 | return TRUE;\r | |
294 | }\r | |
295 | \r | |
296 | /**\r | |
297 | This routine is the chipset code that accepts a request to "lock" SMRAM.\r | |
298 | The region could be legacy AB or TSEG near top of physical memory.\r | |
299 | The use of "lock" means that the memory can no longer be opened\r | |
300 | to BS state.\r | |
301 | **/\r | |
302 | VOID\r | |
303 | EFIAPI\r | |
304 | QNCLockSmramRegion (\r | |
305 | VOID\r | |
306 | )\r | |
307 | {\r | |
308 | UINT32 Smram;\r | |
309 | \r | |
310 | // Read the SMRAM register.\r | |
311 | Smram = QncHsmmcRead ();\r | |
312 | if(Smram & SMM_LOCKED) {\r | |
313 | DEBUG ((EFI_D_WARN, "SMRAM region already locked!\n"));\r | |
314 | }\r | |
315 | Smram |= SMM_LOCKED;\r | |
316 | \r | |
317 | QncHsmmcWrite (Smram);\r | |
318 | \r | |
319 | return;\r | |
320 | }\r |