1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/** @file
This is the driver that publishes the SMM Control Ppi.
Copyright (c) 2012 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "SmmControlDriver.h"
EFI_GUID mPeiSmmControlPpiGuid = PEI_SMM_CONTROL_PPI_GUID;
STATIC PEI_SMM_CONTROL_PPI mSmmControlPpi = {
PeiActivate,
PeiDeactivate
};
STATIC EFI_PEI_PPI_DESCRIPTOR mPpiList = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&mPeiSmmControlPpiGuid,
&mSmmControlPpi
};
/**
This is the constructor for the SMM Control ppi
@param[in] FfsHeader FfsHeader.
@param[in] PeiServices General purpose services available to every PEIM.
@retval EFI_STATUS Results of the installation of the SMM Control Ppi
**/
EFI_STATUS
EFIAPI
SmmControlPeiDriverEntryInit (
IN EFI_PEI_FILE_HANDLE FfsHeader,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
Status = (**PeiServices).InstallPpi (PeiServices, &mPpiList);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
Trigger the software SMI
@param[in] Data The value to be set on the software SMI data port
@retval EFI_SUCCESS Function completes successfully
**/
EFI_STATUS
EFIAPI
SmmTrigger (
IN UINT8 Data
)
{
UINT32 OutputData;
UINT32 OutputPort;
UINT16 AcpiBaseAddr;
//
// Read ACPI Base Address
//
AcpiBaseAddr = (UINT16) PcdGet16 (PcdScAcpiIoPortBaseAddress);
//
// Enable the APMC SMI
//
OutputPort = AcpiBaseAddr + R_SMI_EN;
OutputData = IoRead32 ((UINTN) OutputPort);
OutputData |= (B_SMI_EN_APMC | B_SMI_EN_GBL_SMI);
IoWrite32 (
(UINTN) OutputPort,
(UINT32) (OutputData)
);
OutputPort = R_APM_CNT;
OutputData = Data;
//
// Generate the APMC SMI
//
IoWrite8 (
(UINTN) OutputPort,
(UINT8) (OutputData)
);
return EFI_SUCCESS;
}
/**
Clear the SMI status
@param[in] None
@retval EFI_SUCCESS The function completes successfully
@retval EFI_DEVICE_ERROR Something error occurred
**/
EFI_STATUS
EFIAPI
SmmClear (
VOID
)
{
UINT32 OutputData;
UINT32 OutputPort;
UINT16 AcpiBaseAddr;
//
// Read ACPI Base Address
//
AcpiBaseAddr = (UINT16) PcdGet16 (PcdScAcpiIoPortBaseAddress);
//
// Clear the Power Button Override Status Bit, it gates EOS from being set.
//
OutputPort = AcpiBaseAddr + R_ACPI_PM1_STS;
OutputData = B_ACPI_PM1_STS_PRBTNOR;
IoWrite16 (
(UINTN) OutputPort,
(UINT16) (OutputData)
);
//
// Clear the APM SMI Status Bit
//
OutputPort = AcpiBaseAddr + R_SMI_STS;
OutputData = B_SMI_STS_APM;
IoWrite32 (
(UINTN) OutputPort,
(UINT32) (OutputData)
);
//
// Set the EOS Bit
//
OutputPort = AcpiBaseAddr + R_SMI_EN;
OutputData = IoRead32 ((UINTN) OutputPort);
OutputData |= B_SMI_EN_EOS;
IoWrite32 (
(UINTN) OutputPort,
(UINT32) (OutputData)
);
//
// If the EOS bit did not get set, then we've got a problem.
//
DEBUG_CODE (
OutputData = IoRead32 ((UINTN) OutputPort);
if ((OutputData & B_SMI_EN_EOS) != B_SMI_EN_EOS) {
DEBUG ((EFI_D_ERROR, "Bugger, EOS did not get set!\n"));
return EFI_DEVICE_ERROR;
}
);
return EFI_SUCCESS;
}
/**
This routine generates an SMI
@param[in] PeiServices General purpose services available to every PEIM.
@param[in] This The EFI SMM Control ppi instance
@param[in, out] ArgumentBuffer The buffer of argument
@param[in, out] ArgumentBufferSize The size of the argument buffer
@param[in] Periodic Periodic or not
@param[in] ActivationInterval Interval of periodic SMI
@retval EFI Status Describing the result of the operation
@retval EFI_INVALID_PARAMETER Some parameter value passed is not supported
**/
EFI_STATUS
EFIAPI
PeiActivate (
IN EFI_PEI_SERVICES **PeiServices,
IN PEI_SMM_CONTROL_PPI *This,
IN OUT INT8 *ArgumentBuffer OPTIONAL,
IN OUT UINTN *ArgumentBufferSize OPTIONAL,
IN BOOLEAN Periodic OPTIONAL,
IN UINTN ActivationInterval OPTIONAL
)
{
EFI_STATUS Status;
UINT8 Data;
if (Periodic) {
DEBUG ((EFI_D_WARN, "Invalid parameter\n"));
return EFI_INVALID_PARAMETER;
}
if (ArgumentBuffer == NULL) {
Data = 0xFF;
} else {
if (ArgumentBufferSize == NULL || *ArgumentBufferSize != 1) {
return EFI_INVALID_PARAMETER;
}
Data = *ArgumentBuffer;
}
//
// Clear any pending the APM SMI
//
Status = SmmClear ();
if (EFI_ERROR (Status)) {
return Status;
}
return SmmTrigger (Data);
}
/**
This routine clears an SMI
@param[in] PeiServices General purpose services available to every PEIM.
@param[in] This The EFI SMM Control ppi instance
@param[in] Periodic Periodic or not
@retval EFI Status Describing the result of the operation
@retval EFI_INVALID_PARAMETER Some parameter value passed is not supported
**/
EFI_STATUS
EFIAPI
PeiDeactivate (
IN EFI_PEI_SERVICES **PeiServices,
IN PEI_SMM_CONTROL_PPI *This,
IN BOOLEAN Periodic OPTIONAL
)
{
if (Periodic) {
return EFI_INVALID_PARAMETER;
}
return SmmClear ();
}
|