LXR linux/drivers/acpi/acpica/rsio.c

   1/*******************************************************************************
   2 *
   3 * Module Name: rsio - IO and DMA resource descriptors
   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#include <acpi/acpi.h>
  45#include "accommon.h"
  46#include "acresrc.h"
  47
  48#define _COMPONENT          ACPI_RESOURCES
  49ACPI_MODULE_NAME("rsio")
  50
  51/*******************************************************************************
  52 *
  53 * acpi_rs_convert_io
  54 *
  55 ******************************************************************************/
  56struct 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
  92struct 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
 120struct 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
 152struct 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
 168struct 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
 189struct 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
 229struct 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};
 291