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reactos/drivers/bus/acpi/resource/rscalc.c
Art Yerkes c501d8112c Create a branch for network fixes. 
svn path=/branches/aicom-network-fixes/; revision=34994
2008-08-01 11:32:26 +00:00

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/*******************************************************************************
*
* Module Name: rscalc - Acpi_rs_calculate_byte_stream_length
* Acpi_rs_calculate_list_length
* $Revision: 1.1 $
*
******************************************************************************/
/*
* 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>
#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 AE_OK if okay, else a valid ACPI_STATUS code
*
* 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 (
RESOURCE *linked_list,
u32 *size_needed)
{
u32 byte_stream_size_needed = 0;
u32 segment_size;
EXTENDED_IRQ_RESOURCE *ex_irq = NULL;
u8 done = FALSE;
while (!done) {
/*
* Init the variable that will hold the size to add to the
* total.
*/
segment_size = 0;
switch (linked_list->id) {
case irq:
/*
* IRQ Resource
*/
/*
* For an IRQ Resource, Byte 3, although optional, will
* always be created - it holds IRQ information.
*/
segment_size = 4;
break;
case dma:
/*
* DMA Resource
*/
/*
* For this resource the size is static
*/
segment_size = 3;
break;
case start_dependent_functions:
/*
* Start Dependent Functions Resource
*/
/*
* For a Start_dependent_functions Resource, Byte 1,
* although optional, will always be created.
*/
segment_size = 2;
break;
case end_dependent_functions:
/*
* End Dependent Functions Resource
*/
/*
* For this resource the size is static
*/
segment_size = 1;
break;
case io:
/*
* IO Port Resource
*/
/*
* For this resource the size is static
*/
segment_size = 8;
break;
case fixed_io:
/*
* Fixed IO Port Resource
*/
/*
* For this resource the size is static
*/
segment_size = 4;
break;
case vendor_specific:
/*
* 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 end_tag:
/*
* End Tag
*/
/*
* For this resource the size is static
*/
segment_size = 2;
done = TRUE;
break;
case memory24:
/*
* 24-Bit Memory Resource
*/
/*
* For this resource the size is static
*/
segment_size = 12;
break;
case memory32:
/*
* 32-Bit Memory Range Resource
*/
/*
* For this resource the size is static
*/
segment_size = 20;
break;
case fixed_memory32:
/*
* 32-Bit Fixed Memory Resource
*/
/*
* For this resource the size is static
*/
segment_size = 12;
break;
case 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) {
segment_size += (1 +
linked_list->data.address16.resource_source_string_length);
}
break;
case 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.address16.resource_source) {
segment_size += (1 +
linked_list->data.address16.resource_source_string_length);
}
break;
case extended_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;
segment_size +=
(linked_list->data.extended_irq.number_of_interrupts -
1) * 4;
if(NULL != ex_irq->resource_source) {
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 (AE_AML_ERROR);
break;
} /* switch (Linked_list->Id) */
/*
* Update the total
*/
byte_stream_size_needed += segment_size;
/*
* Point to the next object
*/
linked_list = (RESOURCE *) ((NATIVE_UINT) linked_list +
(NATIVE_UINT) linked_list->length);
}
/*
* This is the data the caller needs
*/
*size_needed = byte_stream_size_needed;
return (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 AE_OK if okay, else a valid ACPI_STATUS code
*
* 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;
while (bytes_parsed < byte_stream_buffer_length) {
/*
* Look at the next byte in the stream
*/
resource_type = *byte_stream_buffer;
/*
* See if this is a small or large resource
*/
if(resource_type & 0x80) {
/*
* Large Resource Type
*/
switch (resource_type) {
case MEMORY_RANGE_24:
/*
* 24-Bit Memory Resource
*/
bytes_consumed = 12;
structure_size = sizeof (MEMORY24_RESOURCE) +
RESOURCE_LENGTH_NO_DATA;
break;
case LARGE_VENDOR_DEFINED:
/*
* 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 (VENDOR_RESOURCE) +
RESOURCE_LENGTH_NO_DATA +
(temp16 * sizeof (u8));
break;
case MEMORY_RANGE_32:
/*
* 32-Bit Memory Range Resource
*/
bytes_consumed = 20;
structure_size = sizeof (MEMORY32_RESOURCE) +
RESOURCE_LENGTH_NO_DATA;
break;
case FIXED_MEMORY_RANGE_32:
/*
* 32-Bit Fixed Memory Resource
*/
bytes_consumed = 12;
structure_size = sizeof(FIXED_MEMORY32_RESOURCE) +
RESOURCE_LENGTH_NO_DATA;
break;
case 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 (ADDRESS32_RESOURCE) +
RESOURCE_LENGTH_NO_DATA +
(temp8 * sizeof (u8));
break;
case 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 boundry for the structure
*/
temp8 = (u8) ROUND_UP_TO_32_bITS (temp8);
structure_size = sizeof (ADDRESS16_RESOURCE) +
RESOURCE_LENGTH_NO_DATA +
(temp8 * sizeof (u8));
break;
case EXTENDED_IRQ:
/*
* 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 boundry for the structure
*/
temp8 = (u8) ROUND_UP_TO_32_bITS (temp8);
structure_size = sizeof (EXTENDED_IRQ_RESOURCE) +
RESOURCE_LENGTH_NO_DATA +
(additional_bytes * sizeof (u8)) +
(temp8 * sizeof (u8));
break;
/* TBD: [Future] 64-bit not currently supported */
/*
case 0x8A:
break;
*/
default:
/*
* If we get here, everything is out of sync,
* so exit with an error
*/
return (AE_AML_ERROR);
break;
}
}
else {
/*
* Small Resource Type
* Only bits 7:3 are valid
*/
resource_type >>= 3;
switch (resource_type) {
case 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 (IO_RESOURCE) +
RESOURCE_LENGTH_NO_DATA +
(number_of_interrupts * sizeof (u32));
break;
case 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 (DMA_RESOURCE) +
RESOURCE_LENGTH_NO_DATA +
(number_of_channels * sizeof (u32));
break;
case START_DEPENDENT_TAG:
/*
* 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 (START_DEPENDENT_FUNCTIONS_RESOURCE) +
RESOURCE_LENGTH_NO_DATA;
break;
case END_DEPENDENT_TAG:
/*
* End Dependent Functions Resource
*/
bytes_consumed = 1;
structure_size = RESOURCE_LENGTH;
break;
case IO_PORT_DESCRIPTOR:
/*
* IO Port Resource
*/
bytes_consumed = 8;
structure_size = sizeof (IO_RESOURCE) +
RESOURCE_LENGTH_NO_DATA;
break;
case FIXED_LOCATION_IO_DESCRIPTOR:
/*
* Fixed IO Port Resource
*/
bytes_consumed = 4;
structure_size = sizeof (FIXED_IO_RESOURCE) +
RESOURCE_LENGTH_NO_DATA;
break;
case SMALL_VENDOR_DEFINED:
/*
* Vendor Specific Resource
*/
buffer = byte_stream_buffer;
temp8 = *buffer;
temp8 = (u8) (temp8 & 0x7);
bytes_consumed = temp8 + 1;
/*
* Ensure a 32-bit boundry for the structure
*/
temp8 = (u8) ROUND_UP_TO_32_bITS (temp8);
structure_size = sizeof (VENDOR_RESOURCE) +
RESOURCE_LENGTH_NO_DATA +
(temp8 * sizeof (u8));
break;
case END_TAG:
/*
* End Tag
*/
bytes_consumed = 2;
structure_size = 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 (AE_AML_ERROR);
break;
} /* switch */
} /* if(Resource_type & 0x80) */
/*
* 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 (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 AE_OK
*
* 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;
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_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 (AE_OK);
}
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