1/*******************************************************************************
2 *
3 * Module Name: rslist - Linked list utilities
4 *
5 ******************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2011, 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#define __RSLIST_C__
45
46#include "acpi.h"
47#include "accommon.h"
48#include "acresrc.h"
49
50#define _COMPONENT          ACPI_RESOURCES
51        ACPI_MODULE_NAME    ("rslist")
52
53
54/*******************************************************************************
55 *
56 * FUNCTION:    AcpiRsConvertAmlToResources
57 *
58 * PARAMETERS:  ACPI_WALK_AML_CALLBACK
59 *              ResourcePtr             - Pointer to the buffer that will
60 *                                        contain the output structures
61 *
62 * RETURN:      Status
63 *
64 * DESCRIPTION: Convert an AML resource to an internal representation of the
65 *              resource that is aligned and easier to access.
66 *
67 ******************************************************************************/
68
69ACPI_STATUS
70AcpiRsConvertAmlToResources (
71    UINT8                   *Aml,
72    UINT32                  Length,
73    UINT32                  Offset,
74    UINT8                   ResourceIndex,
75    void                    *Context)
76{
77    ACPI_RESOURCE           **ResourcePtr = ACPI_CAST_INDIRECT_PTR (
78                                ACPI_RESOURCE, Context);
79    ACPI_RESOURCE           *Resource;
80    ACPI_STATUS             Status;
81
82
83    ACPI_FUNCTION_TRACE (RsConvertAmlToResources);
84
85
86    /*
87     * Check that the input buffer and all subsequent pointers into it
88     * are aligned on a native word boundary. Most important on IA64
89     */
90    Resource = *ResourcePtr;
91    if (ACPI_IS_MISALIGNED (Resource))
92    {
93        ACPI_WARNING ((AE_INFO,
94            "Misaligned resource pointer %p", Resource));
95    }
96
97    /* Convert the AML byte stream resource to a local resource struct */
98
99    Status = AcpiRsConvertAmlToResource (
100                Resource, ACPI_CAST_PTR (AML_RESOURCE, Aml),
101                AcpiGbl_GetResourceDispatch[ResourceIndex]);
102    if (ACPI_FAILURE (Status))
103    {
104        ACPI_EXCEPTION ((AE_INFO, Status,
105            "Could not convert AML resource (Type 0x%X)", *Aml));
106        return_ACPI_STATUS (Status);
107    }
108
109    ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES,
110        "Type %.2X, AmlLength %.2X InternalLength %.2X\n",
111        AcpiUtGetResourceType (Aml), Length,
112        Resource->Length));
113
114    /* Point to the next structure in the output buffer */
115
116    *ResourcePtr = ACPI_ADD_PTR (void, Resource, Resource->Length);
117    return_ACPI_STATUS (AE_OK);
118}
119
120
121/*******************************************************************************
122 *
123 * FUNCTION:    AcpiRsConvertResourcesToAml
124 *
125 * PARAMETERS:  Resource            - Pointer to the resource linked list
126 *              AmlSizeNeeded       - Calculated size of the byte stream
127 *                                    needed from calling AcpiRsGetAmlLength()
128 *                                    The size of the OutputBuffer is
129 *                                    guaranteed to be >= AmlSizeNeeded
130 *              OutputBuffer        - Pointer to the buffer that will
131 *                                    contain the byte stream
132 *
133 * RETURN:      Status
134 *
135 * DESCRIPTION: Takes the resource linked list and parses it, creating a
136 *              byte stream of resources in the caller's output buffer
137 *
138 ******************************************************************************/
139
140ACPI_STATUS
141AcpiRsConvertResourcesToAml (
142    ACPI_RESOURCE           *Resource,
143    ACPI_SIZE               AmlSizeNeeded,
144    UINT8                   *OutputBuffer)
145{
146    UINT8                   *Aml = OutputBuffer;
147    UINT8                   *EndAml = OutputBuffer + AmlSizeNeeded;
148    ACPI_STATUS             Status;
149
150
151    ACPI_FUNCTION_TRACE (RsConvertResourcesToAml);
152
153
154    /* Walk the resource descriptor list, convert each descriptor */
155
156    while (Aml < EndAml)
157    {
158        /* Validate the (internal) Resource Type */
159
160        if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
161        {
162            ACPI_ERROR ((AE_INFO,
163                "Invalid descriptor type (0x%X) in resource list",
164                Resource->Type));
165            return_ACPI_STATUS (AE_BAD_DATA);
166        }
167
168        /* Perform the conversion */
169
170        Status = AcpiRsConvertResourceToAml (Resource,
171                    ACPI_CAST_PTR (AML_RESOURCE, Aml),
172                    AcpiGbl_SetResourceDispatch[Resource->Type]);
173        if (ACPI_FAILURE (Status))
174        {
175            ACPI_EXCEPTION ((AE_INFO, Status,
176                "Could not convert resource (type 0x%X) to AML",
177                Resource->Type));
178            return_ACPI_STATUS (Status);
179        }
180
181        /* Perform final sanity check on the new AML resource descriptor */
182
183        Status = AcpiUtValidateResource (
184                    ACPI_CAST_PTR (AML_RESOURCE, Aml), NULL);
185        if (ACPI_FAILURE (Status))
186        {
187            return_ACPI_STATUS (Status);
188        }
189
190        /* Check for end-of-list, normal exit */
191
192        if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG)
193        {
194            /* An End Tag indicates the end of the input Resource Template */
195
196            return_ACPI_STATUS (AE_OK);
197        }
198
199        /*
200         * Extract the total length of the new descriptor and set the
201         * Aml to point to the next (output) resource descriptor
202         */
203        Aml += AcpiUtGetDescriptorLength (Aml);
204
205        /* Point to the next input resource descriptor */
206
207        Resource = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, Resource->Length);
208    }
209
210    /* Completed buffer, but did not find an EndTag resource descriptor */
211
212    return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
213}
214
215