drivers/acpi/acpica/rsio.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rsio - IO and DMA resource descriptors
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2010, 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 #include <acpi/acpi.h>
  45 #include "accommon.h"
  46 #include "acresrc.h"
  47
  48 #define _COMPONENT          ACPI_RESOURCES
  49 ACPI_MODULE_NAME("rsio")
  50
  51 /*******************************************************************************
  52  *
  53  * acpi_rs_convert_io
  54  *
  55  ******************************************************************************/
  56 struct acpi_rsconvert_info acpi_rs_convert_io[5] = {
  57         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_IO,
  58          ACPI_RS_SIZE(struct acpi_resource_io),
  59          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_io)},
  60
  61         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_IO,
  62          sizeof(struct aml_resource_io),
  63          0},
  64
  65         /* Decode flag */
  66
  67         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.io.io_decode),
  68          AML_OFFSET(io.flags),
  69          0},
  70         /*
  71          * These fields are contiguous in both the source and destination:
  72          * Address Alignment
  73          * Length
  74          * Minimum Base Address
  75          * Maximum Base Address
  76          */
  77         {ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.io.alignment),
  78          AML_OFFSET(io.alignment),
  79          2},
  80
  81         {ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.io.minimum),
  82          AML_OFFSET(io.minimum),
  83          2}
  84 };
  85
  86 /*******************************************************************************
  87  *
  88  * acpi_rs_convert_fixed_io
  89  *
  90  ******************************************************************************/
  91
  92 struct acpi_rsconvert_info acpi_rs_convert_fixed_io[4] = {
  93         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_FIXED_IO,
  94          ACPI_RS_SIZE(struct acpi_resource_fixed_io),
  95          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_fixed_io)},
  96
  97         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_FIXED_IO,
  98          sizeof(struct aml_resource_fixed_io),
  99          0},
 100         /*
 101          * These fields are contiguous in both the source and destination:
 102          * Base Address
 103          * Length
 104          */
 105         {ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.fixed_io.address_length),
 106          AML_OFFSET(fixed_io.address_length),
 107          1},
 108
 109         {ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.fixed_io.address),
 110          AML_OFFSET(fixed_io.address),
 111          1}
 112 };
 113
 114 /*******************************************************************************
 115  *
 116  * acpi_rs_convert_generic_reg
 117  *
 118  ******************************************************************************/
 119
 120 struct acpi_rsconvert_info acpi_rs_convert_generic_reg[4] = {
 121         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_GENERIC_REGISTER,
 122          ACPI_RS_SIZE(struct acpi_resource_generic_register),
 123          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_generic_reg)},
 124
 125         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_GENERIC_REGISTER,
 126          sizeof(struct aml_resource_generic_register),
 127          0},
 128         /*
 129          * These fields are contiguous in both the source and destination:
 130          * Address Space ID
 131          * Register Bit Width
 132          * Register Bit Offset
 133          * Access Size
 134          */
 135         {ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.generic_reg.space_id),
 136          AML_OFFSET(generic_reg.address_space_id),
 137          4},
 138
 139         /* Get the Register Address */
 140
 141         {ACPI_RSC_MOVE64, ACPI_RS_OFFSET(data.generic_reg.address),
 142          AML_OFFSET(generic_reg.address),
 143          1}
 144 };
 145
 146 /*******************************************************************************
 147  *
 148  * acpi_rs_convert_end_dpf
 149  *
 150  ******************************************************************************/
 151
 152 struct acpi_rsconvert_info acpi_rs_convert_end_dpf[2] = {
 153         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_END_DEPENDENT,
 154          ACPI_RS_SIZE_MIN,
 155          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_end_dpf)},
 156
 157         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_END_DEPENDENT,
 158          sizeof(struct aml_resource_end_dependent),
 159          0}
 160 };
 161
 162 /*******************************************************************************
 163  *
 164  * acpi_rs_convert_end_tag
 165  *
 166  ******************************************************************************/
 167
 168 struct acpi_rsconvert_info acpi_rs_convert_end_tag[2] = {
 169         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_END_TAG,
 170          ACPI_RS_SIZE_MIN,
 171          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_end_tag)},
 172
 173         /*
 174          * Note: The checksum field is set to zero, meaning that the resource
 175          * data is treated as if the checksum operation succeeded.
 176          * (ACPI Spec 1.0b Section 6.4.2.8)
 177          */
 178         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_END_TAG,
 179          sizeof(struct aml_resource_end_tag),
 180          0}
 181 };
 182
 183 /*******************************************************************************
 184  *
 185  * acpi_rs_get_start_dpf
 186  *
 187  ******************************************************************************/
 188
 189 struct acpi_rsconvert_info acpi_rs_get_start_dpf[6] = {
 190         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_START_DEPENDENT,
 191          ACPI_RS_SIZE(struct acpi_resource_start_dependent),
 192          ACPI_RSC_TABLE_SIZE(acpi_rs_get_start_dpf)},
 193
 194         /* Defaults for Compatibility and Performance priorities */
 195
 196         {ACPI_RSC_SET8, ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
 197          ACPI_ACCEPTABLE_CONFIGURATION,
 198          2},
 199
 200         /* Get the descriptor length (0 or 1 for Start Dpf descriptor) */
 201
 202         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
 203          AML_OFFSET(start_dpf.descriptor_type),
 204          0},
 205
 206         /* All done if there is no flag byte present in the descriptor */
 207
 208         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_AML_LENGTH, 0, 1},
 209
 210         /* Flag byte is present, get the flags */
 211
 212         {ACPI_RSC_2BITFLAG,
 213          ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
 214          AML_OFFSET(start_dpf.flags),
 215          0},
 216
 217         {ACPI_RSC_2BITFLAG,
 218          ACPI_RS_OFFSET(data.start_dpf.performance_robustness),
 219          AML_OFFSET(start_dpf.flags),
 220          2}
 221 };
 222
 223 /*******************************************************************************
 224  *
 225  * acpi_rs_set_start_dpf
 226  *
 227  ******************************************************************************/
 228
 229 struct acpi_rsconvert_info acpi_rs_set_start_dpf[10] = {
 230         /* Start with a default descriptor of length 1 */
 231
 232         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_START_DEPENDENT,
 233          sizeof(struct aml_resource_start_dependent),
 234          ACPI_RSC_TABLE_SIZE(acpi_rs_set_start_dpf)},
 235
 236         /* Set the default flag values */
 237
 238         {ACPI_RSC_2BITFLAG,
 239          ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
 240          AML_OFFSET(start_dpf.flags),
 241          0},
 242
 243         {ACPI_RSC_2BITFLAG,
 244          ACPI_RS_OFFSET(data.start_dpf.performance_robustness),
 245          AML_OFFSET(start_dpf.flags),
 246          2},
 247         /*
 248          * All done if the output descriptor length is required to be 1
 249          * (i.e., optimization to 0 bytes cannot be attempted)
 250          */
 251         {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
 252          ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
 253          1},
 254
 255         /* Set length to 0 bytes (no flags byte) */
 256
 257         {ACPI_RSC_LENGTH, 0, 0,
 258          sizeof(struct aml_resource_start_dependent_noprio)},
 259
 260         /*
 261          * All done if the output descriptor length is required to be 0.
 262          *
 263          * TBD: Perhaps we should check for error if input flags are not
 264          * compatible with a 0-byte descriptor.
 265          */
 266         {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
 267          ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
 268          0},
 269
 270         /* Reset length to 1 byte (descriptor with flags byte) */
 271
 272         {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_start_dependent)},
 273
 274         /*
 275          * All done if flags byte is necessary -- if either priority value
 276          * is not ACPI_ACCEPTABLE_CONFIGURATION
 277          */
 278         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 279          ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
 280          ACPI_ACCEPTABLE_CONFIGURATION},
 281
 282         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 283          ACPI_RS_OFFSET(data.start_dpf.performance_robustness),
 284          ACPI_ACCEPTABLE_CONFIGURATION},
 285
 286         /* Flag byte is not necessary */
 287
 288         {ACPI_RSC_LENGTH, 0, 0,
 289          sizeof(struct aml_resource_start_dependent_noprio)}
 290 };