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rsmisc.c

/*******************************************************************************
 *
 * Module Name: rsmisc - Miscellaneous resource descriptors
 *
 ******************************************************************************/

/*
 * Copyright (C) 2000 - 2007, R. Byron Moore
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include <acpi/acresrc.h>

#define _COMPONENT          ACPI_RESOURCES
ACPI_MODULE_NAME("rsmisc")
#define INIT_RESOURCE_TYPE(i)       i->resource_offset
#define INIT_RESOURCE_LENGTH(i)     i->aml_offset
#define INIT_TABLE_LENGTH(i)        i->value
#define COMPARE_OPCODE(i)           i->resource_offset
#define COMPARE_TARGET(i)           i->aml_offset
#define COMPARE_VALUE(i)            i->value
/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_convert_aml_to_resource
 *
 * PARAMETERS:  Resource            - Pointer to the resource descriptor
 *              Aml                 - Where the AML descriptor is returned
 *              Info                - Pointer to appropriate conversion table
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert an external AML resource descriptor to the corresponding
 *              internal resource descriptor
 *
 ******************************************************************************/
acpi_status
acpi_rs_convert_aml_to_resource(struct acpi_resource *resource,
                        union aml_resource *aml,
                        struct acpi_rsconvert_info *info)
{
      acpi_rs_length aml_resource_length;
      void *source;
      void *destination;
      char *target;
      u8 count;
      u8 flags_mode = FALSE;
      u16 item_count = 0;
      u16 temp16 = 0;

      ACPI_FUNCTION_TRACE(rs_convert_aml_to_resource);

      if (((acpi_native_uint) resource) & 0x3) {

            /* Each internal resource struct is expected to be 32-bit aligned */

            ACPI_WARNING((AE_INFO,
                        "Misaligned resource pointer (get): %p Type %2.2X Len %X",
                        resource, resource->type, resource->length));
      }

      /* Extract the resource Length field (does not include header length) */

      aml_resource_length = acpi_ut_get_resource_length(aml);

      /*
       * First table entry must be ACPI_RSC_INITxxx and must contain the
       * table length (# of table entries)
       */
      count = INIT_TABLE_LENGTH(info);

      while (count) {
            /*
             * Source is the external AML byte stream buffer,
             * destination is the internal resource descriptor
             */
            source = ACPI_ADD_PTR(void, aml, info->aml_offset);
            destination =
                ACPI_ADD_PTR(void, resource, info->resource_offset);

            switch (info->opcode) {
            case ACPI_RSC_INITGET:
                  /*
                   * Get the resource type and the initial (minimum) length
                   */
                  ACPI_MEMSET(resource, 0, INIT_RESOURCE_LENGTH(info));
                  resource->type = INIT_RESOURCE_TYPE(info);
                  resource->length = INIT_RESOURCE_LENGTH(info);
                  break;

            case ACPI_RSC_INITSET:
                  break;

            case ACPI_RSC_FLAGINIT:

                  flags_mode = TRUE;
                  break;

            case ACPI_RSC_1BITFLAG:
                  /*
                   * Mask and shift the flag bit
                   */
                  ACPI_SET8(destination) = (u8)
                      ((ACPI_GET8(source) >> info->value) & 0x01);
                  break;

            case ACPI_RSC_2BITFLAG:
                  /*
                   * Mask and shift the flag bits
                   */
                  ACPI_SET8(destination) = (u8)
                      ((ACPI_GET8(source) >> info->value) & 0x03);
                  break;

            case ACPI_RSC_COUNT:

                  item_count = ACPI_GET8(source);
                  ACPI_SET8(destination) = (u8) item_count;

                  resource->length = resource->length +
                      (info->value * (item_count - 1));
                  break;

            case ACPI_RSC_COUNT16:

                  item_count = aml_resource_length;
                  ACPI_SET16(destination) = item_count;

                  resource->length = resource->length +
                      (info->value * (item_count - 1));
                  break;

            case ACPI_RSC_LENGTH:

                  resource->length = resource->length + info->value;
                  break;

            case ACPI_RSC_MOVE8:
            case ACPI_RSC_MOVE16:
            case ACPI_RSC_MOVE32:
            case ACPI_RSC_MOVE64:
                  /*
                   * Raw data move. Use the Info value field unless item_count has
                   * been previously initialized via a COUNT opcode
                   */
                  if (info->value) {
                        item_count = info->value;
                  }
                  acpi_rs_move_data(destination, source, item_count,
                                info->opcode);
                  break;

            case ACPI_RSC_SET8:

                  ACPI_MEMSET(destination, info->aml_offset, info->value);
                  break;

            case ACPI_RSC_DATA8:

                  target = ACPI_ADD_PTR(char, resource, info->value);
                  ACPI_MEMCPY(destination, source, ACPI_GET16(target));
                  break;

            case ACPI_RSC_ADDRESS:
                  /*
                   * Common handler for address descriptor flags
                   */
                  if (!acpi_rs_get_address_common(resource, aml)) {
                        return_ACPI_STATUS
                            (AE_AML_INVALID_RESOURCE_TYPE);
                  }
                  break;

            case ACPI_RSC_SOURCE:
                  /*
                   * Optional resource_source (Index and String)
                   */
                  resource->length +=
                      acpi_rs_get_resource_source(aml_resource_length,
                                          info->value,
                                          destination, aml, NULL);
                  break;

            case ACPI_RSC_SOURCEX:
                  /*
                   * Optional resource_source (Index and String). This is the more
                   * complicated case used by the Interrupt() macro
                   */
                  target =
                      ACPI_ADD_PTR(char, resource,
                               info->aml_offset + (item_count * 4));

                  resource->length +=
                      acpi_rs_get_resource_source(aml_resource_length,
                                          (acpi_rs_length) (((item_count - 1) * sizeof(u32)) + info->value), destination, aml, target);
                  break;

            case ACPI_RSC_BITMASK:
                  /*
                   * 8-bit encoded bitmask (DMA macro)
                   */
                  item_count =
                      acpi_rs_decode_bitmask(ACPI_GET8(source),
                                       destination);
                  if (item_count) {
                        resource->length += (item_count - 1);
                  }

                  target = ACPI_ADD_PTR(char, resource, info->value);
                  ACPI_SET8(target) = (u8) item_count;
                  break;

            case ACPI_RSC_BITMASK16:
                  /*
                   * 16-bit encoded bitmask (IRQ macro)
                   */
                  ACPI_MOVE_16_TO_16(&temp16, source);

                  item_count =
                      acpi_rs_decode_bitmask(temp16, destination);
                  if (item_count) {
                        resource->length += (item_count - 1);
                  }

                  target = ACPI_ADD_PTR(char, resource, info->value);
                  ACPI_SET8(target) = (u8) item_count;
                  break;

            case ACPI_RSC_EXIT_NE:
                  /*
                   * Control - Exit conversion if not equal
                   */
                  switch (info->resource_offset) {
                  case ACPI_RSC_COMPARE_AML_LENGTH:
                        if (aml_resource_length != info->value) {
                              goto exit;
                        }
                        break;

                  case ACPI_RSC_COMPARE_VALUE:
                        if (ACPI_GET8(source) != info->value) {
                              goto exit;
                        }
                        break;

                  default:

                        ACPI_ERROR((AE_INFO,
                                  "Invalid conversion sub-opcode"));
                        return_ACPI_STATUS(AE_BAD_PARAMETER);
                  }
                  break;

            default:

                  ACPI_ERROR((AE_INFO, "Invalid conversion opcode"));
                  return_ACPI_STATUS(AE_BAD_PARAMETER);
            }

            count--;
            info++;
      }

      exit:
      if (!flags_mode) {

            /* Round the resource struct length up to the next boundary (32 or 64) */

            resource->length =
                (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(resource->length);
      }
      return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_convert_resource_to_aml
 *
 * PARAMETERS:  Resource            - Pointer to the resource descriptor
 *              Aml                 - Where the AML descriptor is returned
 *              Info                - Pointer to appropriate conversion table
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert an internal resource descriptor to the corresponding
 *              external AML resource descriptor.
 *
 ******************************************************************************/

acpi_status
acpi_rs_convert_resource_to_aml(struct acpi_resource *resource,
                        union aml_resource *aml,
                        struct acpi_rsconvert_info *info)
{
      void *source = NULL;
      void *destination;
      acpi_rsdesc_size aml_length = 0;
      u8 count;
      u16 temp16 = 0;
      u16 item_count = 0;

      ACPI_FUNCTION_TRACE(rs_convert_resource_to_aml);

      /*
       * First table entry must be ACPI_RSC_INITxxx and must contain the
       * table length (# of table entries)
       */
      count = INIT_TABLE_LENGTH(info);

      while (count) {
            /*
             * Source is the internal resource descriptor,
             * destination is the external AML byte stream buffer
             */
            source = ACPI_ADD_PTR(void, resource, info->resource_offset);
            destination = ACPI_ADD_PTR(void, aml, info->aml_offset);

            switch (info->opcode) {
            case ACPI_RSC_INITSET:

                  ACPI_MEMSET(aml, 0, INIT_RESOURCE_LENGTH(info));
                  aml_length = INIT_RESOURCE_LENGTH(info);
                  acpi_rs_set_resource_header(INIT_RESOURCE_TYPE(info),
                                        aml_length, aml);
                  break;

            case ACPI_RSC_INITGET:
                  break;

            case ACPI_RSC_FLAGINIT:
                  /*
                   * Clear the flag byte
                   */
                  ACPI_SET8(destination) = 0;
                  break;

            case ACPI_RSC_1BITFLAG:
                  /*
                   * Mask and shift the flag bit
                   */
                  ACPI_SET8(destination) |= (u8)
                      ((ACPI_GET8(source) & 0x01) << info->value);
                  break;

            case ACPI_RSC_2BITFLAG:
                  /*
                   * Mask and shift the flag bits
                   */
                  ACPI_SET8(destination) |= (u8)
                      ((ACPI_GET8(source) & 0x03) << info->value);
                  break;

            case ACPI_RSC_COUNT:

                  item_count = ACPI_GET8(source);
                  ACPI_SET8(destination) = (u8) item_count;

                  aml_length =
                      (u16) (aml_length +
                           (info->value * (item_count - 1)));
                  break;

            case ACPI_RSC_COUNT16:

                  item_count = ACPI_GET16(source);
                  aml_length = (u16) (aml_length + item_count);
                  acpi_rs_set_resource_length(aml_length, aml);
                  break;

            case ACPI_RSC_LENGTH:

                  acpi_rs_set_resource_length(info->value, aml);
                  break;

            case ACPI_RSC_MOVE8:
            case ACPI_RSC_MOVE16:
            case ACPI_RSC_MOVE32:
            case ACPI_RSC_MOVE64:

                  if (info->value) {
                        item_count = info->value;
                  }
                  acpi_rs_move_data(destination, source, item_count,
                                info->opcode);
                  break;

            case ACPI_RSC_ADDRESS:

                  /* Set the Resource Type, General Flags, and Type-Specific Flags */

                  acpi_rs_set_address_common(aml, resource);
                  break;

            case ACPI_RSC_SOURCEX:
                  /*
                   * Optional resource_source (Index and String)
                   */
                  aml_length =
                      acpi_rs_set_resource_source(aml, (acpi_rs_length)
                                          aml_length, source);
                  acpi_rs_set_resource_length(aml_length, aml);
                  break;

            case ACPI_RSC_SOURCE:
                  /*
                   * Optional resource_source (Index and String). This is the more
                   * complicated case used by the Interrupt() macro
                   */
                  aml_length =
                      acpi_rs_set_resource_source(aml, info->value,
                                          source);
                  acpi_rs_set_resource_length(aml_length, aml);
                  break;

            case ACPI_RSC_BITMASK:
                  /*
                   * 8-bit encoded bitmask (DMA macro)
                   */
                  ACPI_SET8(destination) = (u8)
                      acpi_rs_encode_bitmask(source,
                                       *ACPI_ADD_PTR(u8, resource,
                                                 info->value));
                  break;

            case ACPI_RSC_BITMASK16:
                  /*
                   * 16-bit encoded bitmask (IRQ macro)
                   */
                  temp16 = acpi_rs_encode_bitmask(source,
                                          *ACPI_ADD_PTR(u8,
                                                      resource,
                                                      info->
                                                      value));
                  ACPI_MOVE_16_TO_16(destination, &temp16);
                  break;

            case ACPI_RSC_EXIT_LE:
                  /*
                   * Control - Exit conversion if less than or equal
                   */
                  if (item_count <= info->value) {
                        goto exit;
                  }
                  break;

            case ACPI_RSC_EXIT_NE:
                  /*
                   * Control - Exit conversion if not equal
                   */
                  switch (COMPARE_OPCODE(info)) {
                  case ACPI_RSC_COMPARE_VALUE:

                        if (*ACPI_ADD_PTR(u8, resource,
                                      COMPARE_TARGET(info)) !=
                            COMPARE_VALUE(info)) {
                              goto exit;
                        }
                        break;

                  default:

                        ACPI_ERROR((AE_INFO,
                                  "Invalid conversion sub-opcode"));
                        return_ACPI_STATUS(AE_BAD_PARAMETER);
                  }
                  break;

            default:

                  ACPI_ERROR((AE_INFO, "Invalid conversion opcode"));
                  return_ACPI_STATUS(AE_BAD_PARAMETER);
            }

            count--;
            info++;
      }

      exit:
      return_ACPI_STATUS(AE_OK);
}

#if 0
/* Previous resource validations */

if (aml->ext_address64.revision_iD != AML_RESOURCE_EXTENDED_ADDRESS_REVISION) {
      return_ACPI_STATUS(AE_SUPPORT);
}

if (resource->data.start_dpf.performance_robustness >= 3) {
      return_ACPI_STATUS(AE_AML_BAD_RESOURCE_VALUE);
}

if (((aml->irq.flags & 0x09) == 0x00) || ((aml->irq.flags & 0x09) == 0x09)) {
      /*
       * Only [active_high, edge_sensitive] or [active_low, level_sensitive]
       * polarity/trigger interrupts are allowed (ACPI spec, section
       * "IRQ Format"), so 0x00 and 0x09 are illegal.
       */
      ACPI_ERROR((AE_INFO,
                "Invalid interrupt polarity/trigger in resource list, %X",
                aml->irq.flags));
      return_ACPI_STATUS(AE_BAD_DATA);
}

resource->data.extended_irq.interrupt_count = temp8;
if (temp8 < 1) {

      /* Must have at least one IRQ */

      return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
}

if (resource->data.dma.transfer == 0x03) {
      ACPI_ERROR((AE_INFO, "Invalid DMA.Transfer preference (3)"));
      return_ACPI_STATUS(AE_BAD_DATA);
}
#endif

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