1 /******************************************************************************
3 * Module Name: aeinitfile - Support for optional initialization file
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2015, Intel Corp.
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
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27 * GNU General Public License ("GPL") version 2 as published by the Free
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47 #define _COMPONENT ACPI_TOOLS
48 ACPI_MODULE_NAME ("aeinitfile")
51 /* Local prototypes */
57 ACPI_OPERAND_OBJECT *ObjDesc,
58 ACPI_WALK_STATE *WalkState);
61 #define AE_FILE_BUFFER_SIZE 512
63 static char NameBuffer[AE_FILE_BUFFER_SIZE];
64 static char ValueBuffer[AE_FILE_BUFFER_SIZE];
65 static FILE *InitFile;
68 /******************************************************************************
70 * FUNCTION: AeOpenInitializationFile
72 * PARAMETERS: Filename - Path to the init file
76 * DESCRIPTION: Open the initialization file for the -fi option
78 *****************************************************************************/
81 AeOpenInitializationFile (
85 InitFile = fopen (Filename, "r");
88 perror ("Could not open initialization file");
92 AcpiOsPrintf ("Opened initialization file [%s]\n", Filename);
97 /******************************************************************************
99 * FUNCTION: AeDoObjectOverrides
105 * DESCRIPTION: Read the initialization file and perform all overrides
107 * NOTE: The format of the file is multiple lines, each of format:
108 * <ACPI-pathname> <Integer Value>
110 *****************************************************************************/
113 AeDoObjectOverrides (
116 ACPI_OPERAND_OBJECT *ObjDesc;
117 ACPI_WALK_STATE *WalkState;
126 /* Create needed objects to be reused for each init entry */
128 ObjDesc = AcpiUtCreateIntegerObject (0);
129 WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL);
131 NameBuffer[0] = '\\';
133 /* Read the entire file line-by-line */
135 while (fscanf (InitFile, "%s %s\n",
136 ACPI_CAST_PTR (char, &NameBuffer[1]),
137 ACPI_CAST_PTR (char, &ValueBuffer)) == 2)
139 /* Add a root prefix if not present in the string */
142 if (NameBuffer[1] == '\\')
147 AeDoOneOverride (&NameBuffer[i], ValueBuffer, ObjDesc, WalkState);
153 AcpiDsDeleteWalkState (WalkState);
154 AcpiUtRemoveReference (ObjDesc);
158 /******************************************************************************
160 * FUNCTION: AeDoOneOverride
162 * PARAMETERS: Pathname - AML namepath
163 * ValueString - New integer value to be stored
164 * ObjDesc - Descriptor with integer override value
165 * WalkState - Used for the Store operation
169 * DESCRIPTION: Perform an overrided for a single namespace object
171 *****************************************************************************/
177 ACPI_OPERAND_OBJECT *ObjDesc,
178 ACPI_WALK_STATE *WalkState)
185 AcpiOsPrintf ("Value Override: %s, ", Pathname);
188 * Get the namespace node associated with the override
189 * pathname from the init file.
191 Status = AcpiGetHandle (NULL, Pathname, &Handle);
192 if (ACPI_FAILURE (Status))
194 AcpiOsPrintf ("%s\n", AcpiFormatException (Status));
198 /* Extract the 64-bit integer */
200 Status = AcpiUtStrtoul64 (ValueString, 0, &Value);
201 if (ACPI_FAILURE (Status))
203 AcpiOsPrintf ("%s\n", AcpiFormatException (Status));
207 ObjDesc->Integer.Value = Value;
210 * At the point this function is called, the namespace is fully
211 * built and initialized. We can simply store the new object to
214 AcpiExEnterInterpreter ();
215 Status = AcpiExStore (ObjDesc, Handle, WalkState);
216 AcpiExExitInterpreter ();
218 if (ACPI_FAILURE (Status))
220 AcpiOsPrintf ("%s\n", AcpiFormatException (Status));
224 AcpiOsPrintf ("New value: 0x%8.8X%8.8X\n",
225 ACPI_FORMAT_UINT64 (Value));