diff options
Diffstat (limited to 'drivers/acpi/acpica/rslist.c')
| -rw-r--r-- | drivers/acpi/acpica/rslist.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/rslist.c b/drivers/acpi/acpica/rslist.c new file mode 100644 index 00000000000..483389871a5 --- /dev/null +++ b/drivers/acpi/acpica/rslist.c @@ -0,0 +1,203 @@ +/******************************************************************************* + * + * Module Name: rslist - Linked list utilities + * + ******************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * 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/accommon.h> +#include <acpi/acresrc.h> + +#define _COMPONENT ACPI_RESOURCES +ACPI_MODULE_NAME("rslist") + +/******************************************************************************* + * + * FUNCTION: acpi_rs_convert_aml_to_resources + * + * PARAMETERS: acpi_walk_aml_callback + * resource_ptr - Pointer to the buffer that will + * contain the output structures + * + * RETURN: Status + * + * DESCRIPTION: Convert an AML resource to an internal representation of the + * resource that is aligned and easier to access. + * + ******************************************************************************/ +acpi_status +acpi_rs_convert_aml_to_resources(u8 * aml, + u32 length, + u32 offset, u8 resource_index, void **context) +{ + struct acpi_resource **resource_ptr = + ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context); + struct acpi_resource *resource; + acpi_status status; + + ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources); + + /* + * Check that the input buffer and all subsequent pointers into it + * are aligned on a native word boundary. Most important on IA64 + */ + resource = *resource_ptr; + if (ACPI_IS_MISALIGNED(resource)) { + ACPI_WARNING((AE_INFO, + "Misaligned resource pointer %p", resource)); + } + + /* Convert the AML byte stream resource to a local resource struct */ + + status = + acpi_rs_convert_aml_to_resource(resource, + ACPI_CAST_PTR(union aml_resource, + aml), + acpi_gbl_get_resource_dispatch + [resource_index]); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, + "Could not convert AML resource (Type %X)", + *aml)); + return_ACPI_STATUS(status); + } + + ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, + "Type %.2X, AmlLength %.2X InternalLength %.2X\n", + acpi_ut_get_resource_type(aml), length, + resource->length)); + + /* Point to the next structure in the output buffer */ + + *resource_ptr = ACPI_ADD_PTR(void, resource, resource->length); + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_rs_convert_resources_to_aml + * + * PARAMETERS: Resource - Pointer to the resource linked list + * aml_size_needed - Calculated size of the byte stream + * needed from calling acpi_rs_get_aml_length() + * The size of the output_buffer is + * guaranteed to be >= aml_size_needed + * output_buffer - Pointer to the buffer that will + * contain the byte stream + * + * RETURN: Status + * + * DESCRIPTION: Takes the resource linked list and parses it, creating a + * byte stream of resources in the caller's output buffer + * + ******************************************************************************/ + +acpi_status +acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, + acpi_size aml_size_needed, u8 * output_buffer) +{ + u8 *aml = output_buffer; + u8 *end_aml = output_buffer + aml_size_needed; + acpi_status status; + + ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml); + + /* Walk the resource descriptor list, convert each descriptor */ + + while (aml < end_aml) { + + /* Validate the (internal) Resource Type */ + + if (resource->type > ACPI_RESOURCE_TYPE_MAX) { + ACPI_ERROR((AE_INFO, + "Invalid descriptor type (%X) in resource list", + resource->type)); + return_ACPI_STATUS(AE_BAD_DATA); + } + + /* Perform the conversion */ + + status = acpi_rs_convert_resource_to_aml(resource, ACPI_CAST_PTR(union + aml_resource, + aml), + acpi_gbl_set_resource_dispatch + [resource->type]); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, + "Could not convert resource (type %X) to AML", + resource->type)); + return_ACPI_STATUS(status); + } + + /* Perform final sanity check on the new AML resource descriptor */ + + status = + acpi_ut_validate_resource(ACPI_CAST_PTR + (union aml_resource, aml), NULL); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Check for end-of-list, normal exit */ + + if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { + + /* An End Tag indicates the end of the input Resource Template */ + + return_ACPI_STATUS(AE_OK); + } + + /* + * Extract the total length of the new descriptor and set the + * Aml to point to the next (output) resource descriptor + */ + aml += acpi_ut_get_descriptor_length(aml); + + /* Point to the next input resource descriptor */ + + resource = + ACPI_ADD_PTR(struct acpi_resource, resource, + resource->length); + } + + /* Completed buffer, but did not find an end_tag resource descriptor */ + + return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); +} |