******************************************************************************/
/*
- * Copyright (C) 2000 - 2005, R. Byron Moore
+ * Copyright (C) 2000 - 2006, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME("rscalc")
+/* Local prototypes */
+static u8 acpi_rs_count_set_bits(u16 bit_field);
+
+static acpi_rs_length
+acpi_rs_struct_option_length(struct acpi_resource_source *resource_source);
+
+static u32
+acpi_rs_stream_option_length(u32 resource_length, u32 minimum_total_length);
+
/*******************************************************************************
*
- * FUNCTION: acpi_rs_get_byte_stream_length
+ * FUNCTION: acpi_rs_count_set_bits
*
- * PARAMETERS: linked_list - Pointer to the resource linked list
- * size_needed - u32 pointer of the size buffer needed
- * to properly return the parsed data
+ * PARAMETERS: bit_field - Field in which to count bits
*
- * RETURN: Status
+ * RETURN: Number of bits set within the field
*
- * DESCRIPTION: Takes the resource byte stream and parses it once, calculating
- * the size buffer needed to hold the linked list that conveys
- * the resource data.
+ * DESCRIPTION: Count the number of bits set in a resource field. Used for
+ * (Short descriptor) interrupt and DMA lists.
*
******************************************************************************/
-acpi_status
-acpi_rs_get_byte_stream_length(struct acpi_resource *linked_list,
- acpi_size * size_needed)
-{
- acpi_size byte_stream_size_needed = 0;
- acpi_size segment_size;
- u8 done = FALSE;
-
- ACPI_FUNCTION_TRACE("rs_get_byte_stream_length");
-
- while (!done) {
- /* Init the variable that will hold the size to add to the total. */
-
- segment_size = 0;
-
- switch (linked_list->id) {
- case ACPI_RSTYPE_IRQ:
- /*
- * IRQ Resource
- * For an IRQ Resource, Byte 3, although optional, will always be
- * created - it holds IRQ information.
- */
- segment_size = 4;
- break;
-
- case ACPI_RSTYPE_DMA:
- /*
- * DMA Resource
- * For this resource the size is static
- */
- segment_size = 3;
- break;
-
- case ACPI_RSTYPE_START_DPF:
- /*
- * Start Dependent Functions Resource
- * For a start_dependent_functions Resource, Byte 1, although
- * optional, will always be created.
- */
- segment_size = 2;
- break;
-
- case ACPI_RSTYPE_END_DPF:
- /*
- * End Dependent Functions Resource
- * For this resource the size is static
- */
- segment_size = 1;
- break;
-
- case ACPI_RSTYPE_IO:
- /*
- * IO Port Resource
- * For this resource the size is static
- */
- segment_size = 8;
- break;
- case ACPI_RSTYPE_FIXED_IO:
- /*
- * Fixed IO Port Resource
- * For this resource the size is static
- */
- segment_size = 4;
- break;
-
- case ACPI_RSTYPE_VENDOR:
- /*
- * Vendor Defined Resource
- * For a Vendor Specific resource, if the Length is between 1 and 7
- * it will be created as a Small Resource data type, otherwise it
- * is a Large Resource data type.
- */
- if (linked_list->data.vendor_specific.length > 7) {
- segment_size = 3;
- } else {
- segment_size = 1;
- }
- segment_size +=
- linked_list->data.vendor_specific.length;
- break;
-
- case ACPI_RSTYPE_END_TAG:
- /*
- * End Tag
- * For this resource the size is static
- */
- segment_size = 2;
- done = TRUE;
- break;
-
- case ACPI_RSTYPE_MEM24:
- /*
- * 24-Bit Memory Resource
- * For this resource the size is static
- */
- segment_size = 12;
- break;
+static u8 acpi_rs_count_set_bits(u16 bit_field)
+{
+ u8 bits_set;
- case ACPI_RSTYPE_MEM32:
- /*
- * 32-Bit Memory Range Resource
- * For this resource the size is static
- */
- segment_size = 20;
- break;
+ ACPI_FUNCTION_ENTRY();
- case ACPI_RSTYPE_FIXED_MEM32:
- /*
- * 32-Bit Fixed Memory Resource
- * For this resource the size is static
- */
- segment_size = 12;
- break;
+ for (bits_set = 0; bit_field; bits_set++) {
+ /* Zero the least significant bit that is set */
- case ACPI_RSTYPE_ADDRESS16:
- /*
- * 16-Bit Address Resource
- * The base size of this byte stream is 16. If a Resource Source
- * string is not NULL, add 1 for the Index + the length of the null
- * terminated string Resource Source + 1 for the null.
- */
- segment_size = 16;
-
- if (linked_list->data.address16.resource_source.
- string_ptr) {
- segment_size +=
- linked_list->data.address16.resource_source.
- string_length;
- segment_size++;
- }
- break;
+ bit_field &= (bit_field - 1);
+ }
- case ACPI_RSTYPE_ADDRESS32:
- /*
- * 32-Bit Address Resource
- * The base size of this byte stream is 26. If a Resource
- * Source string is not NULL, add 1 for the Index + the
- * length of the null terminated string Resource Source +
- * 1 for the null.
- */
- segment_size = 26;
-
- if (linked_list->data.address32.resource_source.
- string_ptr) {
- segment_size +=
- linked_list->data.address32.resource_source.
- string_length;
- segment_size++;
- }
- break;
+ return (bits_set);
+}
- case ACPI_RSTYPE_ADDRESS64:
- /*
- * 64-Bit Address Resource
- * The base size of this byte stream is 46. If a resource_source
- * string is not NULL, add 1 for the Index + the length of the null
- * terminated string Resource Source + 1 for the null.
- */
- segment_size = 46;
-
- if (linked_list->data.address64.resource_source.
- string_ptr) {
- segment_size +=
- linked_list->data.address64.resource_source.
- string_length;
- segment_size++;
- }
- break;
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_struct_option_length
+ *
+ * PARAMETERS: resource_source - Pointer to optional descriptor field
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Common code to handle optional resource_source_index and
+ * resource_source fields in some Large descriptors. Used during
+ * list-to-stream conversion
+ *
+ ******************************************************************************/
- case ACPI_RSTYPE_EXT_IRQ:
- /*
- * Extended IRQ Resource
- * The base size of this byte stream is 9. This is for an Interrupt
- * table length of 1. For each additional interrupt, add 4.
- * If a Resource Source string is not NULL, add 1 for the
- * Index + the length of the null terminated string
- * Resource Source + 1 for the null.
- */
- segment_size = 9 + (((acpi_size)
- linked_list->data.extended_irq.
- number_of_interrupts - 1) * 4);
-
- if (linked_list->data.extended_irq.resource_source.
- string_ptr) {
- segment_size +=
- linked_list->data.extended_irq.
- resource_source.string_length;
- segment_size++;
- }
- break;
+static acpi_rs_length
+acpi_rs_struct_option_length(struct acpi_resource_source *resource_source)
+{
+ ACPI_FUNCTION_ENTRY();
- default:
+ /*
+ * If the resource_source string is valid, return the size of the string
+ * (string_length includes the NULL terminator) plus the size of the
+ * resource_source_index (1).
+ */
+ if (resource_source->string_ptr) {
+ return ((acpi_rs_length) (resource_source->string_length + 1));
+ }
- /* If we get here, everything is out of sync, exit with error */
+ return (0);
+}
- return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_stream_option_length
+ *
+ * PARAMETERS: resource_length - Length from the resource header
+ * minimum_total_length - Minimum length of this resource, before
+ * any optional fields. Includes header size
+ *
+ * RETURN: Length of optional string (0 if no string present)
+ *
+ * DESCRIPTION: Common code to handle optional resource_source_index and
+ * resource_source fields in some Large descriptors. Used during
+ * stream-to-list conversion
+ *
+ ******************************************************************************/
- } /* switch (linked_list->Id) */
+static u32
+acpi_rs_stream_option_length(u32 resource_length,
+ u32 minimum_aml_resource_length)
+{
+ u32 string_length = 0;
- /* Update the total */
+ ACPI_FUNCTION_ENTRY();
- byte_stream_size_needed += segment_size;
+ /*
+ * The resource_source_index and resource_source are optional elements of some
+ * Large-type resource descriptors.
+ */
- /* Point to the next object */
+ /*
+ * If the length of the actual resource descriptor is greater than the ACPI
+ * spec-defined minimum length, it means that a resource_source_index exists
+ * and is followed by a (required) null terminated string. The string length
+ * (including the null terminator) is the resource length minus the minimum
+ * length, minus one byte for the resource_source_index itself.
+ */
+ if (resource_length > minimum_aml_resource_length) {
+ /* Compute the length of the optional string */
- linked_list = ACPI_PTR_ADD(struct acpi_resource,
- linked_list, linked_list->length);
+ string_length =
+ resource_length - minimum_aml_resource_length - 1;
}
- /* This is the data the caller needs */
+ /* Round up length to 32 bits for internal structure alignment */
- *size_needed = byte_stream_size_needed;
- return_ACPI_STATUS(AE_OK);
+ return (ACPI_ROUND_UP_to_32_bITS(string_length));
}
/*******************************************************************************
*
- * FUNCTION: acpi_rs_get_list_length
+ * FUNCTION: acpi_rs_get_aml_length
*
- * PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream
- * byte_stream_buffer_length - Size of byte_stream_buffer
- * size_needed - u32 pointer of the size buffer
- * needed to properly return the
- * parsed data
+ * PARAMETERS: Resource - Pointer to the resource linked list
+ * size_needed - Where the required size is returned
*
* RETURN: Status
*
- * DESCRIPTION: Takes the resource byte stream and parses it once, calculating
- * the size buffer needed to hold the linked list that conveys
- * the resource data.
+ * DESCRIPTION: Takes a linked list of internal resource descriptors and
+ * calculates the size buffer needed to hold the corresponding
+ * external resource byte stream.
*
******************************************************************************/
acpi_status
-acpi_rs_get_list_length(u8 * byte_stream_buffer,
- u32 byte_stream_buffer_length, acpi_size * size_needed)
+acpi_rs_get_aml_length(struct acpi_resource * resource, acpi_size * size_needed)
{
- u32 buffer_size = 0;
- u32 bytes_parsed = 0;
- u8 number_of_interrupts = 0;
- u8 number_of_channels = 0;
- u8 resource_type;
- u32 structure_size;
- u32 bytes_consumed;
- u8 *buffer;
- u8 temp8;
- u16 temp16;
- u8 index;
- u8 additional_bytes;
-
- ACPI_FUNCTION_TRACE("rs_get_list_length");
+ acpi_size aml_size_needed = 0;
+ acpi_rs_length total_size;
- while (bytes_parsed < byte_stream_buffer_length) {
- /* The next byte in the stream is the resource type */
+ ACPI_FUNCTION_TRACE("rs_get_aml_length");
- resource_type = acpi_rs_get_resource_type(*byte_stream_buffer);
+ /* Traverse entire list of internal resource descriptors */
- switch (resource_type) {
- case ACPI_RDESC_TYPE_MEMORY_24:
- /*
- * 24-Bit Memory Resource
- */
- bytes_consumed = 12;
-
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_mem24);
- break;
+ while (resource) {
+ /* Validate the descriptor type */
- case ACPI_RDESC_TYPE_LARGE_VENDOR:
- /*
- * Vendor Defined Resource
- */
- buffer = byte_stream_buffer;
- ++buffer;
-
- ACPI_MOVE_16_TO_16(&temp16, buffer);
- bytes_consumed = temp16 + 3;
-
- /* Ensure a 32-bit boundary for the structure */
+ if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
+ return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
+ }
- temp16 = (u16) ACPI_ROUND_UP_to_32_bITS(temp16);
+ /* Get the base size of the (external stream) resource descriptor */
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_vendor) +
- (temp16 * sizeof(u8));
- break;
+ total_size = acpi_gbl_aml_resource_sizes[resource->type];
- case ACPI_RDESC_TYPE_MEMORY_32:
+ /*
+ * Augment the base size for descriptors with optional and/or
+ * variable-length fields
+ */
+ switch (resource->type) {
+ case ACPI_RESOURCE_TYPE_VENDOR:
/*
- * 32-Bit Memory Range Resource
+ * Vendor Defined Resource:
+ * For a Vendor Specific resource, if the Length is between 1 and 7
+ * it will be created as a Small Resource data type, otherwise it
+ * is a Large Resource data type.
*/
- bytes_consumed = 20;
+ if (resource->data.vendor.byte_length > 7) {
+ /* Base size of a Large resource descriptor */
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_mem32);
- break;
+ total_size =
+ sizeof(struct aml_resource_large_header);
+ }
- case ACPI_RDESC_TYPE_FIXED_MEMORY_32:
- /*
- * 32-Bit Fixed Memory Resource
- */
- bytes_consumed = 12;
+ /* Add the size of the vendor-specific data */
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct
- acpi_resource_fixed_mem32);
+ total_size = (acpi_rs_length)
+ (total_size + resource->data.vendor.byte_length);
break;
- case ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE:
+ case ACPI_RESOURCE_TYPE_END_TAG:
/*
- * 64-Bit Address Resource
+ * End Tag:
+ * We are done -- return the accumulated total size.
*/
- buffer = byte_stream_buffer;
+ *size_needed = aml_size_needed + total_size;
- ++buffer;
- ACPI_MOVE_16_TO_16(&temp16, buffer);
+ /* Normal exit */
- bytes_consumed = temp16 + 3;
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct
- acpi_resource_address64);
- break;
+ return_ACPI_STATUS(AE_OK);
- case ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE:
+ case ACPI_RESOURCE_TYPE_ADDRESS16:
/*
- * 64-Bit Address Resource
+ * 16-Bit Address Resource:
+ * Add the size of the optional resource_source info
*/
- buffer = byte_stream_buffer;
-
- ++buffer;
- ACPI_MOVE_16_TO_16(&temp16, buffer);
-
- bytes_consumed = temp16 + 3;
+ total_size = (acpi_rs_length)
+ (total_size +
+ acpi_rs_struct_option_length(&resource->data.
+ address16.
+ resource_source));
+ break;
+ case ACPI_RESOURCE_TYPE_ADDRESS32:
/*
- * Resource Source Index and Resource Source are optional elements.
- * Check the length of the Bytestream. If it is greater than 43,
- * that means that an Index exists and is followed by a null
- * terminated string. Therefore, set the temp variable to the
- * length minus the minimum byte stream length plus the byte for
- * the Index to determine the size of the NULL terminated string.
+ * 32-Bit Address Resource:
+ * Add the size of the optional resource_source info
*/
- if (43 < temp16) {
- temp8 = (u8) (temp16 - 44);
- } else {
- temp8 = 0;
- }
-
- /* Ensure a 64-bit boundary for the structure */
-
- temp8 = (u8) ACPI_ROUND_UP_to_64_bITS(temp8);
-
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_address64)
- + (temp8 * sizeof(u8));
+ total_size = (acpi_rs_length)
+ (total_size +
+ acpi_rs_struct_option_length(&resource->data.
+ address32.
+ resource_source));
break;
- case ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE:
+ case ACPI_RESOURCE_TYPE_ADDRESS64:
/*
- * 32-Bit Address Resource
+ * 64-Bit Address Resource:
+ * Add the size of the optional resource_source info
*/
- buffer = byte_stream_buffer;
-
- ++buffer;
- ACPI_MOVE_16_TO_16(&temp16, buffer);
-
- bytes_consumed = temp16 + 3;
+ total_size = (acpi_rs_length)
+ (total_size +
+ acpi_rs_struct_option_length(&resource->data.
+ address64.
+ resource_source));
+ break;
+ case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
/*
- * Resource Source Index and Resource Source are optional elements.
- * Check the length of the Bytestream. If it is greater than 23,
- * that means that an Index exists and is followed by a null
- * terminated string. Therefore, set the temp variable to the
- * length minus the minimum byte stream length plus the byte for
- * the Index to determine the size of the NULL terminated string.
+ * Extended IRQ Resource:
+ * Add the size of each additional optional interrupt beyond the
+ * required 1 (4 bytes for each u32 interrupt number)
*/
- if (23 < temp16) {
- temp8 = (u8) (temp16 - 24);
- } else {
- temp8 = 0;
- }
-
- /* Ensure a 32-bit boundary for the structure */
-
- temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8);
+ total_size = (acpi_rs_length)
+ (total_size +
+ ((resource->data.extended_irq.interrupt_count -
+ 1) * 4) +
+ /* Add the size of the optional resource_source info */
+ acpi_rs_struct_option_length(&resource->data.
+ extended_irq.
+ resource_source));
+ break;
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_address32)
- + (temp8 * sizeof(u8));
+ default:
break;
+ }
- case ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE:
- /*
- * 16-Bit Address Resource
- */
- buffer = byte_stream_buffer;
+ /* Update the total */
- ++buffer;
- ACPI_MOVE_16_TO_16(&temp16, buffer);
+ aml_size_needed += total_size;
- bytes_consumed = temp16 + 3;
+ /* Point to the next object */
- /*
- * Resource Source Index and Resource Source are optional elements.
- * Check the length of the Bytestream. If it is greater than 13,
- * that means that an Index exists and is followed by a null
- * terminated string. Therefore, set the temp variable to the
- * length minus the minimum byte stream length plus the byte for
- * the Index to determine the size of the NULL terminated string.
- */
- if (13 < temp16) {
- temp8 = (u8) (temp16 - 14);
- } else {
- temp8 = 0;
- }
+ resource =
+ ACPI_ADD_PTR(struct acpi_resource, resource,
+ resource->length);
+ }
- /* Ensure a 32-bit boundary for the structure */
+ /* Did not find an end_tag resource descriptor */
- temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8);
+ return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
+}
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_address16)
- + (temp8 * sizeof(u8));
- break;
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_get_list_length
+ *
+ * PARAMETERS: aml_buffer - Pointer to the resource byte stream
+ * aml_buffer_length - Size of aml_buffer
+ * size_needed - Where the size needed is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Takes an external resource byte stream and calculates the size
+ * buffer needed to hold the corresponding internal resource
+ * descriptor linked list.
+ *
+ ******************************************************************************/
- case ACPI_RDESC_TYPE_EXTENDED_XRUPT:
- /*
- * Extended IRQ
- */
- buffer = byte_stream_buffer;
+acpi_status
+acpi_rs_get_list_length(u8 * aml_buffer,
+ u32 aml_buffer_length, acpi_size * size_needed)
+{
+ acpi_status status;
+ u8 *end_aml;
+ u8 *buffer;
+ u32 buffer_size = 0;
+ u16 temp16;
+ u16 resource_length;
+ u32 extra_struct_bytes;
+ u8 resource_index;
+ u8 minimum_aml_resource_length;
- ++buffer;
- ACPI_MOVE_16_TO_16(&temp16, buffer);
+ ACPI_FUNCTION_TRACE("rs_get_list_length");
- bytes_consumed = temp16 + 3;
+ end_aml = aml_buffer + aml_buffer_length;
- /*
- * Point past the length field and the Interrupt vector flags to
- * save off the Interrupt table length to the Temp8 variable.
- */
- buffer += 3;
- temp8 = *buffer;
+ /* Walk the list of AML resource descriptors */
- /*
- * To compensate for multiple interrupt numbers, add 4 bytes for
- * each additional interrupts greater than 1
- */
- additional_bytes = (u8) ((temp8 - 1) * 4);
+ while (aml_buffer < end_aml) {
+ /* Validate the Resource Type and Resource Length */
- /*
- * Resource Source Index and Resource Source are optional elements.
- * Check the length of the Bytestream. If it is greater than 9,
- * that means that an Index exists and is followed by a null
- * terminated string. Therefore, set the temp variable to the
- * length minus the minimum byte stream length plus the byte for
- * the Index to determine the size of the NULL terminated string.
- */
- if (9 + additional_bytes < temp16) {
- temp8 = (u8) (temp16 - (9 + additional_bytes));
- } else {
- temp8 = 0;
- }
+ status = acpi_ut_validate_resource(aml_buffer, &resource_index);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
- /* Ensure a 32-bit boundary for the structure */
+ /* Get the resource length and base (minimum) AML size */
- temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8);
+ resource_length = acpi_ut_get_resource_length(aml_buffer);
+ minimum_aml_resource_length =
+ acpi_gbl_resource_aml_sizes[resource_index];
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_ext_irq) +
- (additional_bytes * sizeof(u8)) +
- (temp8 * sizeof(u8));
- break;
+ /*
+ * Augment the size for descriptors with optional
+ * and/or variable length fields
+ */
+ extra_struct_bytes = 0;
+ buffer =
+ aml_buffer + acpi_ut_get_resource_header_length(aml_buffer);
- case ACPI_RDESC_TYPE_IRQ_FORMAT:
+ switch (acpi_ut_get_resource_type(aml_buffer)) {
+ case ACPI_RESOURCE_NAME_IRQ:
/*
- * IRQ Resource.
- * Determine if it there are two or three trailing bytes
+ * IRQ Resource:
+ * Get the number of bits set in the 16-bit IRQ mask
*/
- buffer = byte_stream_buffer;
- temp8 = *buffer;
-
- if (temp8 & 0x01) {
- bytes_consumed = 4;
- } else {
- bytes_consumed = 3;
- }
-
- /* Point past the descriptor */
-
- ++buffer;
-
- /* Look at the number of bits set */
-
ACPI_MOVE_16_TO_16(&temp16, buffer);
-
- for (index = 0; index < 16; index++) {
- if (temp16 & 0x1) {
- ++number_of_interrupts;
- }
-
- temp16 >>= 1;
- }
-
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_io) +
- (number_of_interrupts * sizeof(u32));
+ extra_struct_bytes = acpi_rs_count_set_bits(temp16);
break;
- case ACPI_RDESC_TYPE_DMA_FORMAT:
+ case ACPI_RESOURCE_NAME_DMA:
/*
- * DMA Resource
+ * DMA Resource:
+ * Get the number of bits set in the 8-bit DMA mask
*/
- buffer = byte_stream_buffer;
- bytes_consumed = 3;
-
- /* Point past the descriptor */
-
- ++buffer;
-
- /* Look at the number of bits set */
-
- temp8 = *buffer;
-
- for (index = 0; index < 8; index++) {
- if (temp8 & 0x1) {
- ++number_of_channels;
- }
-
- temp8 >>= 1;
- }
-
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_dma) +
- (number_of_channels * sizeof(u32));
+ extra_struct_bytes = acpi_rs_count_set_bits(*buffer);
break;
- case ACPI_RDESC_TYPE_START_DEPENDENT:
+ case ACPI_RESOURCE_NAME_VENDOR_SMALL:
/*
- * Start Dependent Functions Resource
- * Determine if it there are two or three trailing bytes
+ * Vendor Resource:
+ * Ensure a 32-bit boundary for the structure
*/
- buffer = byte_stream_buffer;
- temp8 = *buffer;
-
- if (temp8 & 0x01) {
- bytes_consumed = 2;
- } else {
- bytes_consumed = 1;
- }
-
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct
- acpi_resource_start_dpf);
+ extra_struct_bytes =
+ ACPI_ROUND_UP_to_32_bITS(resource_length) -
+ resource_length;
break;
- case ACPI_RDESC_TYPE_END_DEPENDENT:
+ case ACPI_RESOURCE_NAME_END_TAG:
/*
- * End Dependent Functions Resource
+ * End Tag: This is the normal exit, add size of end_tag
*/
- bytes_consumed = 1;
- structure_size = ACPI_RESOURCE_LENGTH;
- break;
+ *size_needed = buffer_size + ACPI_RS_SIZE_MIN;
+ return_ACPI_STATUS(AE_OK);
- case ACPI_RDESC_TYPE_IO_PORT:
+ case ACPI_RESOURCE_NAME_VENDOR_LARGE:
/*
- * IO Port Resource
+ * Vendor Resource:
+ * Add vendor data and ensure a 32-bit boundary for the structure
*/
- bytes_consumed = 8;
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_io);
+ extra_struct_bytes =
+ ACPI_ROUND_UP_to_32_bITS(resource_length) -
+ resource_length;
break;
- case ACPI_RDESC_TYPE_FIXED_IO_PORT:
+ case ACPI_RESOURCE_NAME_ADDRESS32:
+ case ACPI_RESOURCE_NAME_ADDRESS16:
/*
- * Fixed IO Port Resource
+ * 32-Bit or 16-bit Address Resource:
+ * Add the size of any optional data (resource_source)
*/
- bytes_consumed = 4;
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_fixed_io);
+ extra_struct_bytes =
+ acpi_rs_stream_option_length(resource_length,
+ minimum_aml_resource_length);
break;
- case ACPI_RDESC_TYPE_SMALL_VENDOR:
+ case ACPI_RESOURCE_NAME_EXTENDED_IRQ:
/*
- * Vendor Specific Resource
+ * Extended IRQ:
+ * Point past the interrupt_vector_flags to get the
+ * interrupt_table_length.
*/
- buffer = byte_stream_buffer;
+ buffer++;
- temp8 = *buffer;
- temp8 = (u8) (temp8 & 0x7);
- bytes_consumed = temp8 + 1;
-
- /* Ensure a 32-bit boundary for the structure */
-
- temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8);
- structure_size =
- ACPI_SIZEOF_RESOURCE(struct acpi_resource_vendor) +
- (temp8 * sizeof(u8));
+ extra_struct_bytes =
+ /*
+ * Add 4 bytes for each additional interrupt. Note: at
+ * least one interrupt is required and is included in
+ * the minimum descriptor size
+ */
+ ((*buffer - 1) * sizeof(u32)) +
+ /* Add the size of any optional data (resource_source) */
+ acpi_rs_stream_option_length(resource_length -
+ extra_struct_bytes,
+ minimum_aml_resource_length);
break;
- case ACPI_RDESC_TYPE_END_TAG:
+ case ACPI_RESOURCE_NAME_ADDRESS64:
/*
- * End Tag
+ * 64-Bit Address Resource:
+ * Add the size of any optional data (resource_source)
+ * Ensure a 64-bit boundary for the structure
*/
- bytes_consumed = 2;
- structure_size = ACPI_RESOURCE_LENGTH;
- byte_stream_buffer_length = bytes_parsed;
+ extra_struct_bytes =
+ ACPI_ROUND_UP_to_64_bITS
+ (acpi_rs_stream_option_length
+ (resource_length, minimum_aml_resource_length));
break;
default:
- /*
- * If we get here, everything is out of sync,
- * exit with an error
- */
- return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
+ break;
}
- /* Update the return value and counter */
-
- buffer_size += (u32) ACPI_ALIGN_RESOURCE_SIZE(structure_size);
- bytes_parsed += bytes_consumed;
+ /* Update the required buffer size for the internal descriptor structs */
- /* Set the byte stream to point to the next resource */
+ temp16 = (u16) (acpi_gbl_resource_struct_sizes[resource_index] +
+ extra_struct_bytes);
+ buffer_size += (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(temp16);
- byte_stream_buffer += bytes_consumed;
+ /*
+ * Point to the next resource within the stream
+ * using the size of the header plus the length contained in the header
+ */
+ aml_buffer += acpi_ut_get_descriptor_length(aml_buffer);
}
- /* This is the data the caller needs */
+ /* Did not find an end_tag resource descriptor */
- *size_needed = buffer_size;
- return_ACPI_STATUS(AE_OK);
+ return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
}
/*******************************************************************************
for (table_index = 0; table_index < 4 && !name_found;
table_index++) {
- if ((ACPI_TYPE_STRING ==
- ACPI_GET_OBJECT_TYPE(*sub_object_list))
- ||
- ((ACPI_TYPE_LOCAL_REFERENCE ==
- ACPI_GET_OBJECT_TYPE(*sub_object_list))
- && ((*sub_object_list)->reference.opcode ==
- AML_INT_NAMEPATH_OP))) {
+ if (*sub_object_list && /* Null object allowed */
+ ((ACPI_TYPE_STRING ==
+ ACPI_GET_OBJECT_TYPE(*sub_object_list)) ||
+ ((ACPI_TYPE_LOCAL_REFERENCE ==
+ ACPI_GET_OBJECT_TYPE(*sub_object_list)) &&
+ ((*sub_object_list)->reference.opcode ==
+ AML_INT_NAMEPATH_OP)))) {
name_found = TRUE;
} else {
/* Look at the next element */
git.openpandora.org / pandora-kernel.git / blobdiff