******************************************************************************/
/*
- * Copyright (C) 2000 - 2005, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME("rslist")
-/* Local prototypes */
-static ACPI_GET_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type);
-
-static acpi_status acpi_rs_validate_resource_length(union aml_resource *aml);
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_validate_resource_length
- *
- * PARAMETERS: Aml - Pointer to the AML resource descriptor
- *
- * RETURN: Status - AE_OK if the resource length appears valid
- *
- * DESCRIPTION: Validate the resource_length. Fixed-length descriptors must
- * have the exact length; variable-length descriptors must be
- * at least as long as the minimum. Certain Small descriptors
- * can vary in size by at most one byte.
- *
- ******************************************************************************/
-
-static acpi_status acpi_rs_validate_resource_length(union aml_resource *aml)
-{
- struct acpi_resource_info *resource_info;
- u16 minimum_aml_resource_length;
- u16 resource_length;
-
- ACPI_FUNCTION_ENTRY();
-
- /* Get the size and type info about this resource descriptor */
-
- resource_info =
- acpi_rs_get_resource_info(aml->small_header.descriptor_type);
- if (!resource_info) {
- return (AE_AML_INVALID_RESOURCE_TYPE);
- }
-
- resource_length = acpi_rs_get_resource_length(aml);
- minimum_aml_resource_length =
- resource_info->minimum_aml_resource_length;
-
- /* Validate based upon the type of resource, fixed length or variable */
-
- if (resource_info->length_type == ACPI_FIXED_LENGTH) {
- /* Fixed length resource, length must match exactly */
-
- if (resource_length != minimum_aml_resource_length) {
- return (AE_AML_BAD_RESOURCE_LENGTH);
- }
- } else if (resource_info->length_type == ACPI_VARIABLE_LENGTH) {
- /* Variable length resource, must be at least the minimum */
-
- if (resource_length < minimum_aml_resource_length) {
- return (AE_AML_BAD_RESOURCE_LENGTH);
- }
- } else {
- /* Small variable length resource, allowed to be (Min) or (Min-1) */
-
- if ((resource_length > minimum_aml_resource_length) ||
- (resource_length < (minimum_aml_resource_length - 1))) {
- return (AE_AML_BAD_RESOURCE_LENGTH);
- }
- }
-
- return (AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_rs_get_resource_handler
- *
- * PARAMETERS: resource_type - Byte 0 of a resource descriptor
- *
- * RETURN: Pointer to the resource conversion handler
- *
- * DESCRIPTION: Extract the Resource Type/Name from the first byte of
- * a resource descriptor.
- *
- ******************************************************************************/
-
-static ACPI_GET_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type)
-{
- ACPI_FUNCTION_ENTRY();
-
- /* Determine if this is a small or large resource */
-
- if (resource_type & ACPI_RESOURCE_NAME_LARGE) {
- /* Large Resource Type -- bits 6:0 contain the name */
-
- if (resource_type > ACPI_RESOURCE_NAME_LARGE_MAX) {
- return (NULL);
- }
-
- return (acpi_gbl_lg_get_resource_dispatch[(resource_type &
- ACPI_RESOURCE_NAME_LARGE_MASK)]);
- } else {
- /* Small Resource Type -- bits 6:3 contain the name */
-
- return (acpi_gbl_sm_get_resource_dispatch[((resource_type &
- ACPI_RESOURCE_NAME_SMALL_MASK)
- >> 3)]);
- }
-}
-
/*******************************************************************************
*
* FUNCTION: acpi_rs_convert_aml_to_resources
*
- * PARAMETERS: aml_buffer - Pointer to the resource byte stream
- * aml_buffer_length - Length of aml_buffer
- * output_buffer - Pointer to the buffer that will
- * contain the output structures
+ * PARAMETERS: acpi_walk_aml_callback
+ * resource_ptr - Pointer to the buffer that will
+ * contain the output structures
*
* RETURN: Status
*
- * DESCRIPTION: Takes the resource byte stream and parses it, creating a
- * linked list of resources in the caller's output buffer
+ * 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_buffer,
- u32 aml_buffer_length, u8 * output_buffer)
+acpi_rs_convert_aml_to_resources(u8 * aml,
+ u32 length,
+ u32 offset, u8 resource_index, void **context)
{
- u8 *buffer = output_buffer;
- acpi_status status;
- acpi_size bytes_parsed = 0;
+ struct acpi_resource **resource_ptr =
+ ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context);
struct acpi_resource *resource;
- u16 resource_length;
- u32 descriptor_length;
- ACPI_GET_RESOURCE_HANDLER handler;
-
- ACPI_FUNCTION_TRACE("rs_convert_aml_to_resources");
-
- /* Loop until end-of-buffer or an end_tag is found */
-
- while (bytes_parsed < aml_buffer_length) {
- /* Get the handler associated with this Descriptor Type */
-
- handler = acpi_rs_get_resource_handler(*aml_buffer);
- if (!handler) {
- /* No handler indicates invalid resource type */
-
- return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
- }
-
- resource_length =
- acpi_rs_get_resource_length(ACPI_CAST_PTR
- (union aml_resource,
- aml_buffer));
-
- descriptor_length =
- acpi_rs_get_descriptor_length(ACPI_CAST_PTR
- (union aml_resource,
- aml_buffer));
-
- /*
- * Perform limited validation of the resource length, based upon
- * what we know about the resource type
- */
- status =
- acpi_rs_validate_resource_length(ACPI_CAST_PTR
- (union aml_resource,
- aml_buffer));
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- /* Convert a byte stream resource to local resource struct */
-
- status = handler(ACPI_CAST_PTR(union aml_resource, aml_buffer),
- resource_length,
- ACPI_CAST_PTR(struct acpi_resource, buffer));
- if (ACPI_FAILURE(status)) {
- ACPI_REPORT_ERROR(("Could not convert AML resource (type %X) to resource, %s\n", *aml_buffer, acpi_format_exception(status)));
- return_ACPI_STATUS(status);
- }
-
- /* Set the aligned length of the new resource descriptor */
-
- resource = ACPI_CAST_PTR(struct acpi_resource, buffer);
- resource->length =
- (u32) ACPI_ALIGN_RESOURCE_SIZE(resource->length);
-
- /* Normal exit on completion of an end_tag resource descriptor */
-
- if (acpi_rs_get_resource_type(*aml_buffer) ==
- ACPI_RESOURCE_NAME_END_TAG) {
- return_ACPI_STATUS(AE_OK);
- }
-
- /* Update counter and point to the next input resource */
+ acpi_status status;
- bytes_parsed += descriptor_length;
- aml_buffer += descriptor_length;
+ ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources);
- /* Point to the next structure in the output buffer */
+ /*
+ * 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));
+ }
- buffer += resource->length;
+ /* 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);
}
- /* Completed buffer, but did not find an end_tag resource descriptor */
+ ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
+ "Type %.2X, AmlLength %.2X InternalLength %.2X\n",
+ acpi_ut_get_resource_type(aml), length,
+ resource->length));
- return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
+ /* Point to the next structure in the output buffer */
+
+ *resource_ptr = ACPI_ADD_PTR(void, resource, resource->length);
+ return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,
acpi_size aml_size_needed, u8 * output_buffer)
{
- u8 *aml_buffer = 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");
+ ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml);
+
+ /* Walk the resource descriptor list, convert each descriptor */
- /* Convert each resource descriptor in the list */
+ while (aml < end_aml) {
- while (1) {
- /* Validate Resource Descriptor Type before dispatch */
+ /* Validate the (internal) Resource Type */
if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Invalid descriptor type (%X) in resource list\n",
- resource->type));
+ ACPI_ERROR((AE_INFO,
+ "Invalid descriptor type (%X) in resource list",
+ resource->type));
return_ACPI_STATUS(AE_BAD_DATA);
}
- /* Perform the conversion per resource type */
+ /* Perform the conversion */
- status =
- acpi_gbl_set_resource_dispatch[resource->type] (resource,
- ACPI_CAST_PTR
- (union
- aml_resource,
- aml_buffer));
+ 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_REPORT_ERROR(("Could not convert resource (type %X) to AML, %s\n", resource->type, acpi_format_exception(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_rs_validate_resource_length(ACPI_CAST_PTR
- (union aml_resource,
- aml_buffer));
+ 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 */
- /* Set the aml_buffer to point to the next (output) resource descriptor */
-
- aml_buffer +=
- acpi_rs_get_descriptor_length(ACPI_CAST_PTR
- (union aml_resource,
- aml_buffer));
+ /*
+ * 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_PTR_ADD(struct acpi_resource, 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);
}
projects / linux-2.6 / blobdiff