drivers/acpi/resources/rsio.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rsio - IO and DMA resource descriptors
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2008, 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 <acpi/acresrc.h>
  46
  47 #define _COMPONENT          ACPI_RESOURCES
  48 ACPI_MODULE_NAME("rsio")
  49
  50 /*******************************************************************************
  51  *
  52  * acpi_rs_convert_io
  53  *
  54  ******************************************************************************/
  55 struct acpi_rsconvert_info acpi_rs_convert_io[5] = {
  56         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_IO,
  57          ACPI_RS_SIZE(struct acpi_resource_io),
  58          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_io)},
  59
  60         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_IO,
  61          sizeof(struct aml_resource_io),
  62          0},
  63
  64         /* Decode flag */
  65
  66         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.io.io_decode),
  67          AML_OFFSET(io.flags),
  68          0},
  69         /*
  70          * These fields are contiguous in both the source and destination:
  71          * Address Alignment
  72          * Length
  73          * Minimum Base Address
  74          * Maximum Base Address
  75          */
  76         {ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.io.alignment),
  77          AML_OFFSET(io.alignment),
  78          2},
  79
  80         {ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.io.minimum),
  81          AML_OFFSET(io.minimum),
  82          2}
  83 };
  84
  85 /*******************************************************************************
  86  *
  87  * acpi_rs_convert_fixed_io
  88  *
  89  ******************************************************************************/
  90
  91 struct acpi_rsconvert_info acpi_rs_convert_fixed_io[4] = {
  92         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_FIXED_IO,
  93          ACPI_RS_SIZE(struct acpi_resource_fixed_io),
  94          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_fixed_io)},
  95
  96         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_FIXED_IO,
  97          sizeof(struct aml_resource_fixed_io),
  98          0},
  99         /*
 100          * These fields are contiguous in both the source and destination:
 101          * Base Address
 102          * Length
 103          */
 104         {ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.fixed_io.address_length),
 105          AML_OFFSET(fixed_io.address_length),
 106          1},
 107
 108         {ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.fixed_io.address),
 109          AML_OFFSET(fixed_io.address),
 110          1}
 111 };
 112
 113 /*******************************************************************************
 114  *
 115  * acpi_rs_convert_generic_reg
 116  *
 117  ******************************************************************************/
 118
 119 struct acpi_rsconvert_info acpi_rs_convert_generic_reg[4] = {
 120         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_GENERIC_REGISTER,
 121          ACPI_RS_SIZE(struct acpi_resource_generic_register),
 122          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_generic_reg)},
 123
 124         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_GENERIC_REGISTER,
 125          sizeof(struct aml_resource_generic_register),
 126          0},
 127         /*
 128          * These fields are contiguous in both the source and destination:
 129          * Address Space ID
 130          * Register Bit Width
 131          * Register Bit Offset
 132          * Access Size
 133          */
 134         {ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.generic_reg.space_id),
 135          AML_OFFSET(generic_reg.address_space_id),
 136          4},
 137
 138         /* Get the Register Address */
 139
 140         {ACPI_RSC_MOVE64, ACPI_RS_OFFSET(data.generic_reg.address),
 141          AML_OFFSET(generic_reg.address),
 142          1}
 143 };
 144
 145 /*******************************************************************************
 146  *
 147  * acpi_rs_convert_end_dpf
 148  *
 149  ******************************************************************************/
 150
 151 struct acpi_rsconvert_info acpi_rs_convert_end_dpf[2] = {
 152         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_END_DEPENDENT,
 153          ACPI_RS_SIZE_MIN,
 154          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_end_dpf)},
 155
 156         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_END_DEPENDENT,
 157          sizeof(struct aml_resource_end_dependent),
 158          0}
 159 };
 160
 161 /*******************************************************************************
 162  *
 163  * acpi_rs_convert_end_tag
 164  *
 165  ******************************************************************************/
 166
 167 struct acpi_rsconvert_info acpi_rs_convert_end_tag[2] = {
 168         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_END_TAG,
 169          ACPI_RS_SIZE_MIN,
 170          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_end_tag)},
 171
 172         /*
 173          * Note: The checksum field is set to zero, meaning that the resource
 174          * data is treated as if the checksum operation succeeded.
 175          * (ACPI Spec 1.0b Section 6.4.2.8)
 176          */
 177         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_END_TAG,
 178          sizeof(struct aml_resource_end_tag),
 179          0}
 180 };
 181
 182 /*******************************************************************************
 183  *
 184  * acpi_rs_get_start_dpf
 185  *
 186  ******************************************************************************/
 187
 188 struct acpi_rsconvert_info acpi_rs_get_start_dpf[6] = {
 189         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_START_DEPENDENT,
 190          ACPI_RS_SIZE(struct acpi_resource_start_dependent),
 191          ACPI_RSC_TABLE_SIZE(acpi_rs_get_start_dpf)},
 192
 193         /* Defaults for Compatibility and Performance priorities */
 194
 195         {ACPI_RSC_SET8, ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
 196          ACPI_ACCEPTABLE_CONFIGURATION,
 197          2},
 198
 199         /* Get the descriptor length (0 or 1 for Start Dpf descriptor) */
 200
 201         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
 202          AML_OFFSET(start_dpf.descriptor_type),
 203          0},
 204
 205         /* All done if there is no flag byte present in the descriptor */
 206
 207         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_AML_LENGTH, 0, 1},
 208
 209         /* Flag byte is present, get the flags */
 210
 211         {ACPI_RSC_2BITFLAG,
 212          ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
 213          AML_OFFSET(start_dpf.flags),
 214          0},
 215
 216         {ACPI_RSC_2BITFLAG,
 217          ACPI_RS_OFFSET(data.start_dpf.performance_robustness),
 218          AML_OFFSET(start_dpf.flags),
 219          2}
 220 };
 221
 222 /*******************************************************************************
 223  *
 224  * acpi_rs_set_start_dpf
 225  *
 226  ******************************************************************************/
 227
 228 struct acpi_rsconvert_info acpi_rs_set_start_dpf[10] = {
 229         /* Start with a default descriptor of length 1 */
 230
 231         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_START_DEPENDENT,
 232          sizeof(struct aml_resource_start_dependent),
 233          ACPI_RSC_TABLE_SIZE(acpi_rs_set_start_dpf)},
 234
 235         /* Set the default flag values */
 236
 237         {ACPI_RSC_2BITFLAG,
 238          ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
 239          AML_OFFSET(start_dpf.flags),
 240          0},
 241
 242         {ACPI_RSC_2BITFLAG,
 243          ACPI_RS_OFFSET(data.start_dpf.performance_robustness),
 244          AML_OFFSET(start_dpf.flags),
 245          2},
 246         /*
 247          * All done if the output descriptor length is required to be 1
 248          * (i.e., optimization to 0 bytes cannot be attempted)
 249          */
 250         {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
 251          ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
 252          1},
 253
 254         /* Set length to 0 bytes (no flags byte) */
 255
 256         {ACPI_RSC_LENGTH, 0, 0,
 257          sizeof(struct aml_resource_start_dependent_noprio)},
 258
 259         /*
 260          * All done if the output descriptor length is required to be 0.
 261          *
 262          * TBD: Perhaps we should check for error if input flags are not
 263          * compatible with a 0-byte descriptor.
 264          */
 265         {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
 266          ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
 267          0},
 268
 269         /* Reset length to 1 byte (descriptor with flags byte) */
 270
 271         {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_start_dependent)},
 272
 273         /*
 274          * All done if flags byte is necessary -- if either priority value
 275          * is not ACPI_ACCEPTABLE_CONFIGURATION
 276          */
 277         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 278          ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
 279          ACPI_ACCEPTABLE_CONFIGURATION},
 280
 281         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 282          ACPI_RS_OFFSET(data.start_dpf.performance_robustness),
 283          ACPI_ACCEPTABLE_CONFIGURATION},
 284
 285         /* Flag byte is not necessary */
 286
 287         {ACPI_RSC_LENGTH, 0, 0,
 288          sizeof(struct aml_resource_start_dependent_noprio)}
 289 };