utmisc.c revision 245582 
1/*******************************************************************************
2 *
3 * Module Name: utmisc - common utility procedures
4 *
5 ******************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2013, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions, and the following disclaimer,
16 *    without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 *    substantially similar to the "NO WARRANTY" disclaimer below
19 *    ("Disclaimer") and any redistribution must be conditioned upon
20 *    including a substantially similar Disclaimer requirement for further
21 *    binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 *    of any contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44
45#define __UTMISC_C__
46
47#include <contrib/dev/acpica/include/acpi.h>
48#include <contrib/dev/acpica/include/accommon.h>
49#include <contrib/dev/acpica/include/acnamesp.h>
50
51
52#define _COMPONENT          ACPI_UTILITIES
53        ACPI_MODULE_NAME    ("utmisc")
54
55
56/*******************************************************************************
57 *
58 * FUNCTION:    AcpiUtIsPciRootBridge
59 *
60 * PARAMETERS:  Id              - The HID/CID in string format
61 *
62 * RETURN:      TRUE if the Id is a match for a PCI/PCI-Express Root Bridge
63 *
64 * DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID.
65 *
66 ******************************************************************************/
67
68BOOLEAN
69AcpiUtIsPciRootBridge (
70    char                    *Id)
71{
72
73    /*
74     * Check if this is a PCI root bridge.
75     * ACPI 3.0+: check for a PCI Express root also.
76     */
77    if (!(ACPI_STRCMP (Id,
78            PCI_ROOT_HID_STRING)) ||
79
80        !(ACPI_STRCMP (Id,
81            PCI_EXPRESS_ROOT_HID_STRING)))
82    {
83        return (TRUE);
84    }
85
86    return (FALSE);
87}
88
89
90/*******************************************************************************
91 *
92 * FUNCTION:    AcpiUtIsAmlTable
93 *
94 * PARAMETERS:  Table               - An ACPI table
95 *
96 * RETURN:      TRUE if table contains executable AML; FALSE otherwise
97 *
98 * DESCRIPTION: Check ACPI Signature for a table that contains AML code.
99 *              Currently, these are DSDT,SSDT,PSDT. All other table types are
100 *              data tables that do not contain AML code.
101 *
102 ******************************************************************************/
103
104BOOLEAN
105AcpiUtIsAmlTable (
106    ACPI_TABLE_HEADER       *Table)
107{
108
109    /* These are the only tables that contain executable AML */
110
111    if (ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_DSDT) ||
112        ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_PSDT) ||
113        ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_SSDT))
114    {
115        return (TRUE);
116    }
117
118    return (FALSE);
119}
120
121
122/*******************************************************************************
123 *
124 * FUNCTION:    AcpiUtDwordByteSwap
125 *
126 * PARAMETERS:  Value           - Value to be converted
127 *
128 * RETURN:      UINT32 integer with bytes swapped
129 *
130 * DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes)
131 *
132 ******************************************************************************/
133
134UINT32
135AcpiUtDwordByteSwap (
136    UINT32                  Value)
137{
138    union
139    {
140        UINT32              Value;
141        UINT8               Bytes[4];
142    } Out;
143    union
144    {
145        UINT32              Value;
146        UINT8               Bytes[4];
147    } In;
148
149
150    ACPI_FUNCTION_ENTRY ();
151
152
153    In.Value = Value;
154
155    Out.Bytes[0] = In.Bytes[3];
156    Out.Bytes[1] = In.Bytes[2];
157    Out.Bytes[2] = In.Bytes[1];
158    Out.Bytes[3] = In.Bytes[0];
159
160    return (Out.Value);
161}
162
163
164/*******************************************************************************
165 *
166 * FUNCTION:    AcpiUtSetIntegerWidth
167 *
168 * PARAMETERS:  Revision            From DSDT header
169 *
170 * RETURN:      None
171 *
172 * DESCRIPTION: Set the global integer bit width based upon the revision
173 *              of the DSDT. For Revision 1 and 0, Integers are 32 bits.
174 *              For Revision 2 and above, Integers are 64 bits. Yes, this
175 *              makes a difference.
176 *
177 ******************************************************************************/
178
179void
180AcpiUtSetIntegerWidth (
181    UINT8                   Revision)
182{
183
184    if (Revision < 2)
185    {
186        /* 32-bit case */
187
188        AcpiGbl_IntegerBitWidth    = 32;
189        AcpiGbl_IntegerNybbleWidth = 8;
190        AcpiGbl_IntegerByteWidth   = 4;
191    }
192    else
193    {
194        /* 64-bit case (ACPI 2.0+) */
195
196        AcpiGbl_IntegerBitWidth    = 64;
197        AcpiGbl_IntegerNybbleWidth = 16;
198        AcpiGbl_IntegerByteWidth   = 8;
199    }
200}
201
202
203/*******************************************************************************
204 *
205 * FUNCTION:    AcpiUtCreateUpdateStateAndPush
206 *
207 * PARAMETERS:  Object          - Object to be added to the new state
208 *              Action          - Increment/Decrement
209 *              StateList       - List the state will be added to
210 *
211 * RETURN:      Status
212 *
213 * DESCRIPTION: Create a new state and push it
214 *
215 ******************************************************************************/
216
217ACPI_STATUS
218AcpiUtCreateUpdateStateAndPush (
219    ACPI_OPERAND_OBJECT     *Object,
220    UINT16                  Action,
221    ACPI_GENERIC_STATE      **StateList)
222{
223    ACPI_GENERIC_STATE       *State;
224
225
226    ACPI_FUNCTION_ENTRY ();
227
228
229    /* Ignore null objects; these are expected */
230
231    if (!Object)
232    {
233        return (AE_OK);
234    }
235
236    State = AcpiUtCreateUpdateState (Object, Action);
237    if (!State)
238    {
239        return (AE_NO_MEMORY);
240    }
241
242    AcpiUtPushGenericState (StateList, State);
243    return (AE_OK);
244}
245
246
247/*******************************************************************************
248 *
249 * FUNCTION:    AcpiUtWalkPackageTree
250 *
251 * PARAMETERS:  SourceObject        - The package to walk
252 *              TargetObject        - Target object (if package is being copied)
253 *              WalkCallback        - Called once for each package element
254 *              Context             - Passed to the callback function
255 *
256 * RETURN:      Status
257 *
258 * DESCRIPTION: Walk through a package
259 *
260 ******************************************************************************/
261
262ACPI_STATUS
263AcpiUtWalkPackageTree (
264    ACPI_OPERAND_OBJECT     *SourceObject,
265    void                    *TargetObject,
266    ACPI_PKG_CALLBACK       WalkCallback,
267    void                    *Context)
268{
269    ACPI_STATUS             Status = AE_OK;
270    ACPI_GENERIC_STATE      *StateList = NULL;
271    ACPI_GENERIC_STATE      *State;
272    UINT32                  ThisIndex;
273    ACPI_OPERAND_OBJECT     *ThisSourceObj;
274
275
276    ACPI_FUNCTION_TRACE (UtWalkPackageTree);
277
278
279    State = AcpiUtCreatePkgState (SourceObject, TargetObject, 0);
280    if (!State)
281    {
282        return_ACPI_STATUS (AE_NO_MEMORY);
283    }
284
285    while (State)
286    {
287        /* Get one element of the package */
288
289        ThisIndex     = State->Pkg.Index;
290        ThisSourceObj = (ACPI_OPERAND_OBJECT *)
291                        State->Pkg.SourceObject->Package.Elements[ThisIndex];
292
293        /*
294         * Check for:
295         * 1) An uninitialized package element. It is completely
296         *    legal to declare a package and leave it uninitialized
297         * 2) Not an internal object - can be a namespace node instead
298         * 3) Any type other than a package. Packages are handled in else
299         *    case below.
300         */
301        if ((!ThisSourceObj) ||
302            (ACPI_GET_DESCRIPTOR_TYPE (ThisSourceObj) != ACPI_DESC_TYPE_OPERAND) ||
303            (ThisSourceObj->Common.Type != ACPI_TYPE_PACKAGE))
304        {
305            Status = WalkCallback (ACPI_COPY_TYPE_SIMPLE, ThisSourceObj,
306                                    State, Context);
307            if (ACPI_FAILURE (Status))
308            {
309                return_ACPI_STATUS (Status);
310            }
311
312            State->Pkg.Index++;
313            while (State->Pkg.Index >= State->Pkg.SourceObject->Package.Count)
314            {
315                /*
316                 * We've handled all of the objects at this level,  This means
317                 * that we have just completed a package. That package may
318                 * have contained one or more packages itself.
319                 *
320                 * Delete this state and pop the previous state (package).
321                 */
322                AcpiUtDeleteGenericState (State);
323                State = AcpiUtPopGenericState (&StateList);
324
325                /* Finished when there are no more states */
326
327                if (!State)
328                {
329                    /*
330                     * We have handled all of the objects in the top level
331                     * package just add the length of the package objects
332                     * and exit
333                     */
334                    return_ACPI_STATUS (AE_OK);
335                }
336
337                /*
338                 * Go back up a level and move the index past the just
339                 * completed package object.
340                 */
341                State->Pkg.Index++;
342            }
343        }
344        else
345        {
346            /* This is a subobject of type package */
347
348            Status = WalkCallback (ACPI_COPY_TYPE_PACKAGE, ThisSourceObj,
349                                        State, Context);
350            if (ACPI_FAILURE (Status))
351            {
352                return_ACPI_STATUS (Status);
353            }
354
355            /*
356             * Push the current state and create a new one
357             * The callback above returned a new target package object.
358             */
359            AcpiUtPushGenericState (&StateList, State);
360            State = AcpiUtCreatePkgState (ThisSourceObj,
361                                            State->Pkg.ThisTargetObj, 0);
362            if (!State)
363            {
364                /* Free any stacked Update State objects */
365
366                while (StateList)
367                {
368                    State = AcpiUtPopGenericState (&StateList);
369                    AcpiUtDeleteGenericState (State);
370                }
371                return_ACPI_STATUS (AE_NO_MEMORY);
372            }
373        }
374    }
375
376    /* We should never get here */
377
378    return_ACPI_STATUS (AE_AML_INTERNAL);
379}
380
381
382#ifdef ACPI_DEBUG_OUTPUT
383/*******************************************************************************
384 *
385 * FUNCTION:    AcpiUtDisplayInitPathname
386 *
387 * PARAMETERS:  Type                - Object type of the node
388 *              ObjHandle           - Handle whose pathname will be displayed
389 *              Path                - Additional path string to be appended.
390 *                                      (NULL if no extra path)
391 *
392 * RETURN:      ACPI_STATUS
393 *
394 * DESCRIPTION: Display full pathname of an object, DEBUG ONLY
395 *
396 ******************************************************************************/
397
398void
399AcpiUtDisplayInitPathname (
400    UINT8                   Type,
401    ACPI_NAMESPACE_NODE     *ObjHandle,
402    char                    *Path)
403{
404    ACPI_STATUS             Status;
405    ACPI_BUFFER             Buffer;
406
407
408    ACPI_FUNCTION_ENTRY ();
409
410
411    /* Only print the path if the appropriate debug level is enabled */
412
413    if (!(AcpiDbgLevel & ACPI_LV_INIT_NAMES))
414    {
415        return;
416    }
417
418    /* Get the full pathname to the node */
419
420    Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
421    Status = AcpiNsHandleToPathname (ObjHandle, &Buffer);
422    if (ACPI_FAILURE (Status))
423    {
424        return;
425    }
426
427    /* Print what we're doing */
428
429    switch (Type)
430    {
431    case ACPI_TYPE_METHOD:
432        AcpiOsPrintf ("Executing    ");
433        break;
434
435    default:
436        AcpiOsPrintf ("Initializing ");
437        break;
438    }
439
440    /* Print the object type and pathname */
441
442    AcpiOsPrintf ("%-12s  %s",
443        AcpiUtGetTypeName (Type), (char *) Buffer.Pointer);
444
445    /* Extra path is used to append names like _STA, _INI, etc. */
446
447    if (Path)
448    {
449        AcpiOsPrintf (".%s", Path);
450    }
451    AcpiOsPrintf ("\n");
452
453    ACPI_FREE (Buffer.Pointer);
454}
455#endif
456