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/*******************************************************************************
*
* Module Name: rscalc - Calculate stream and list lengths
* $Revision: 32 $
*
******************************************************************************/
/*
* Copyright (C) 2000, 2001 R. Byron Moore
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "acpi.h"
#include "acresrc.h"
#include "amlcode.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_RESOURCES
MODULE_NAME ("rscalc")
/*******************************************************************************
*
* FUNCTION: Acpi_rs_calculate_byte_stream_length
*
* PARAMETERS: Linked_list - Pointer to the resource linked list
* Size_needed - u32 pointer of the size buffer needed
* to properly return the parsed data
*
* 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.
*
******************************************************************************/
acpi_status
acpi_rs_calculate_byte_stream_length (
acpi_resource *linked_list,
u32 *size_needed)
{
u32 byte_stream_size_needed = 0;
u32 segment_size;
acpi_resource_ext_irq *ex_irq = NULL;
u8 done = FALSE;
FUNCTION_TRACE ("Rs_calculate_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;
case ACPI_RSTYPE_MEM32:
/*
* 32-Bit Memory Range Resource
* For this resource the size is static
*/
segment_size = 20;
break;
case ACPI_RSTYPE_FIXED_MEM32:
/*
* 32-Bit Fixed Memory Resource
* For this resource the size is static
*/
segment_size = 12;
break;
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 (NULL != linked_list->data.address16.resource_source.string_ptr) {
segment_size += (1 +
linked_list->data.address16.resource_source.string_length);
}
break;
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 (NULL != linked_list->data.address32.resource_source.string_ptr) {
segment_size += (1 +
linked_list->data.address32.resource_source.string_length);
}
break;
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 (NULL != linked_list->data.address64.resource_source.string_ptr) {
segment_size += (1 +
linked_list->data.address64.resource_source.string_length);
}
break;
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 +
((linked_list->data.extended_irq.number_of_interrupts - 1) * 4);
if (NULL != ex_irq->resource_source.string_ptr) {
segment_size += (1 +
linked_list->data.extended_irq.resource_source.string_length);
}
break;
default:
/*
* If we get here, everything is out of sync,
* so exit with an error
*/
return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
break;
} /* switch (Linked_list->Id) */
/*
* Update the total
*/
byte_stream_size_needed += segment_size;
/*
* Point to the next object
*/
linked_list = POINTER_ADD (acpi_resource,
linked_list, linked_list->length);
}
/*
* This is the data the caller needs
*/
*size_needed = byte_stream_size_needed;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_rs_calculate_list_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
*
* 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.
*
******************************************************************************/
acpi_status
acpi_rs_calculate_list_length (
u8 *byte_stream_buffer,
u32 byte_stream_buffer_length,
u32 *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;
FUNCTION_TRACE ("Rs_calculate_list_length");
while (bytes_parsed < byte_stream_buffer_length) {
/*
* The next byte in the stream is the resource type
*/
resource_type = acpi_rs_get_resource_type (*byte_stream_buffer);
switch (resource_type) {
case RESOURCE_DESC_MEMORY_24:
/*
* 24-Bit Memory Resource
*/
bytes_consumed = 12;
structure_size = SIZEOF_RESOURCE (acpi_resource_mem24);
break;
case RESOURCE_DESC_LARGE_VENDOR:
/*
* Vendor Defined Resource
*/
buffer = byte_stream_buffer;
++buffer;
MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
bytes_consumed = temp16 + 3;
/*
* Ensure a 32-bit boundary for the structure
*/
temp16 = (u16) ROUND_UP_TO_32_bITS (temp16);
structure_size = SIZEOF_RESOURCE (acpi_resource_vendor) +
(temp16 * sizeof (u8));
break;
case RESOURCE_DESC_MEMORY_32:
/*
* 32-Bit Memory Range Resource
*/
bytes_consumed = 20;
structure_size = SIZEOF_RESOURCE (acpi_resource_mem32);
break;
case RESOURCE_DESC_FIXED_MEMORY_32:
/*
* 32-Bit Fixed Memory Resource
*/
bytes_consumed = 12;
structure_size = SIZEOF_RESOURCE (acpi_resource_fixed_mem32);
break;
case RESOURCE_DESC_QWORD_ADDRESS_SPACE:
/*
* 64-Bit Address Resource
*/
buffer = byte_stream_buffer;
++buffer;
MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
bytes_consumed = temp16 + 3;
/*
* 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 termininated 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 terminiated string.
*/
if (43 < temp16) {
temp8 = (u8) (temp16 - 44);
}
else {
temp8 = 0;
}
/*
* Ensure a 64-bit boundary for the structure
*/
temp8 = (u8) ROUND_UP_TO_64_bITS (temp8);
structure_size = SIZEOF_RESOURCE (acpi_resource_address64) +
(temp8 * sizeof (u8));
break;
case RESOURCE_DESC_DWORD_ADDRESS_SPACE:
/*
* 32-Bit Address Resource
*/
buffer = byte_stream_buffer;
++buffer;
MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
bytes_consumed = temp16 + 3;
/*
* 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 termininated 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 terminiated string.
*/
if (23 < temp16) {
temp8 = (u8) (temp16 - 24);
}
else {
temp8 = 0;
}
/*
* Ensure a 32-bit boundary for the structure
*/
temp8 = (u8) ROUND_UP_TO_32_bITS (temp8);
structure_size = SIZEOF_RESOURCE (acpi_resource_address32) +
(temp8 * sizeof (u8));
break;
case RESOURCE_DESC_WORD_ADDRESS_SPACE:
/*
* 16-Bit Address Resource
*/
buffer = byte_stream_buffer;
++buffer;
MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
bytes_consumed = temp16 + 3;
/*
* 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 termininated 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 terminiated string.
*/
if (13 < temp16) {
temp8 = (u8) (temp16 - 14);
}
else {
temp8 = 0;
}
/*
* Ensure a 32-bit boundary for the structure
*/
temp8 = (u8) ROUND_UP_TO_32_bITS (temp8);
structure_size = SIZEOF_RESOURCE (acpi_resource_address16) +
(temp8 * sizeof (u8));
break;
case RESOURCE_DESC_EXTENDED_XRUPT:
/*
* Extended IRQ
*/
buffer = byte_stream_buffer;
++buffer;
MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
bytes_consumed = temp16 + 3;
/*
* 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;
/*
* To compensate for multiple interrupt numbers, add 4 bytes for
* each additional interrupts greater than 1
*/
additional_bytes = (u8) ((temp8 - 1) * 4);
/*
* 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 termininated 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 terminiated string.
*/
if (9 + additional_bytes < temp16) {
temp8 = (u8) (temp16 - (9 + additional_bytes));
}
else {
temp8 = 0;
}
/*
* Ensure a 32-bit boundary for the structure
*/
temp8 = (u8) ROUND_UP_TO_32_bITS (temp8);
structure_size = SIZEOF_RESOURCE (acpi_resource_ext_irq) +
(additional_bytes * sizeof (u8)) +
(temp8 * sizeof (u8));
break;
case RESOURCE_DESC_IRQ_FORMAT:
/*
* IRQ Resource.
* Determine if it there are two or three trailing bytes
*/
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
*/
MOVE_UNALIGNED16_TO_16 (&temp16, buffer);
for (index = 0; index < 16; index++) {
if (temp16 & 0x1) {
++number_of_interrupts;
}
temp16 >>= 1;
}
structure_size = SIZEOF_RESOURCE (acpi_resource_io) +
(number_of_interrupts * sizeof (u32));
break;
case RESOURCE_DESC_DMA_FORMAT:
/*
* DMA Resource
*/
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 = SIZEOF_RESOURCE (acpi_resource_dma) +
(number_of_channels * sizeof (u32));
break;
case RESOURCE_DESC_START_DEPENDENT:
/*
* Start Dependent Functions Resource
* Determine if it there are two or three trailing bytes
*/
buffer = byte_stream_buffer;
temp8 = *buffer;
if(temp8 & 0x01) {
bytes_consumed = 2;
}
else {
bytes_consumed = 1;
}
structure_size = SIZEOF_RESOURCE (acpi_resource_start_dpf);
break;
case RESOURCE_DESC_END_DEPENDENT:
/*
* End Dependent Functions Resource
*/
bytes_consumed = 1;
structure_size = ACPI_RESOURCE_LENGTH;
break;
case RESOURCE_DESC_IO_PORT:
/*
* IO Port Resource
*/
bytes_consumed = 8;
structure_size = SIZEOF_RESOURCE (acpi_resource_io);
break;
case RESOURCE_DESC_FIXED_IO_PORT:
/*
* Fixed IO Port Resource
*/
bytes_consumed = 4;
structure_size = SIZEOF_RESOURCE (acpi_resource_fixed_io);
break;
case RESOURCE_DESC_SMALL_VENDOR:
/*
* Vendor Specific Resource
*/
buffer = byte_stream_buffer;
temp8 = *buffer;
temp8 = (u8) (temp8 & 0x7);
bytes_consumed = temp8 + 1;
/*
* Ensure a 32-bit boundary for the structure
*/
temp8 = (u8) ROUND_UP_TO_32_bITS (temp8);
structure_size = SIZEOF_RESOURCE (acpi_resource_vendor) +
(temp8 * sizeof (u8));
break;
case RESOURCE_DESC_END_TAG:
/*
* End Tag
*/
bytes_consumed = 2;
structure_size = ACPI_RESOURCE_LENGTH;
byte_stream_buffer_length = bytes_parsed;
break;
default:
/*
* If we get here, everything is out of sync,
* so exit with an error
*/
return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
break;
}
/*
* Update the return value and counter
*/
buffer_size += structure_size;
bytes_parsed += bytes_consumed;
/*
* Set the byte stream to point to the next resource
*/
byte_stream_buffer += bytes_consumed;
}
/*
* This is the data the caller needs
*/
*size_needed = buffer_size;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_rs_calculate_pci_routing_table_length
*
* PARAMETERS: Package_object - Pointer to the package object
* Buffer_size_needed - u32 pointer of the size buffer
* needed to properly return the
* parsed data
*
* RETURN: Status
*
* DESCRIPTION: Given a package representing a PCI routing table, this
* calculates the size of the corresponding linked list of
* descriptions.
*
******************************************************************************/
acpi_status
acpi_rs_calculate_pci_routing_table_length (
acpi_operand_object *package_object,
u32 *buffer_size_needed)
{
u32 number_of_elements;
u32 temp_size_needed = 0;
acpi_operand_object **top_object_list;
u32 index;
acpi_operand_object *package_element;
acpi_operand_object **sub_object_list;
u8 name_found;
u32 table_index;
FUNCTION_TRACE ("Rs_calculate_pci_routing_table_length");
number_of_elements = package_object->package.count;
/*
* Calculate the size of the return buffer.
* The base size is the number of elements * the sizes of the
* structures. Additional space for the strings is added below.
* The minus one is to subtract the size of the u8 Source[1]
* member because it is added below.
*
* But each PRT_ENTRY structure has a pointer to a string and
* the size of that string must be found.
*/
top_object_list = package_object->package.elements;
for (index = 0; index < number_of_elements; index++) {
/*
* Dereference the sub-package
*/
package_element = *top_object_list;
/*
* The Sub_object_list will now point to an array of the
* four IRQ elements: Address, Pin, Source and Source_index
*/
sub_object_list = package_element->package.elements;
/*
* Scan the Irq_table_elements for the Source Name String
*/
name_found = FALSE;
for (table_index = 0; table_index < 4 && !name_found; table_index++) {
if ((ACPI_TYPE_STRING == (*sub_object_list)->common.type) ||
((INTERNAL_TYPE_REFERENCE == (*sub_object_list)->common.type) &&
((*sub_object_list)->reference.opcode == AML_INT_NAMEPATH_OP))) {
name_found = TRUE;
}
else {
/*
* Look at the next element
*/
sub_object_list++;
}
}
temp_size_needed += (sizeof (pci_routing_table) - 4);
/*
* Was a String type found?
*/
if (TRUE == name_found) {
if (ACPI_TYPE_STRING == (*sub_object_list)->common.type) {
/*
* The length String.Length field includes the
* terminating NULL
*/
temp_size_needed += (*sub_object_list)->string.length;
}
else {
temp_size_needed += acpi_ns_get_pathname_length (
(*sub_object_list)->reference.node);
}
}
else {
/*
* If no name was found, then this is a NULL, which is
* translated as a u32 zero.
*/
temp_size_needed += sizeof (u32);
}
/* Round up the size since each element must be aligned */
temp_size_needed = ROUND_UP_TO_64_bITS (temp_size_needed);
/*
* Point to the next acpi_operand_object
*/
top_object_list++;
}
/*
* Adding an extra element to the end of the list, essentially a NULL terminator
*/
*buffer_size_needed = temp_size_needed + sizeof (pci_routing_table);
return_ACPI_STATUS (AE_OK);
}
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