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|
/******************************************************************************
*
* Module Name: rslist - Acpi_rs_byte_stream_to_list
* Acpi_list_to_byte_stream
* $Revision: 6 $
*
*****************************************************************************/
/*
* Copyright (C) 2000 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"
#define _COMPONENT RESOURCE_MANAGER
MODULE_NAME ("rslist")
/***************************************************************************
* FUNCTION: Acpi_rs_byte_stream_to_list
*
* PARAMETERS:
* Byte_stream_buffer - Pointer to the resource byte stream
* Byte_stream_buffer_length - Length of Byte_stream_buffer
* Output_buffer - Pointer to the buffer that will
* contain the output structures
*
* RETURN: Status AE_OK if okay, else a valid ACPI_STATUS code
*
* DESCRIPTION: Takes the resource byte stream and parses it, creating a
* linked list of resources in the caller's output buffer
*
***************************************************************************/
ACPI_STATUS
acpi_rs_byte_stream_to_list (
u8 *byte_stream_buffer,
u32 byte_stream_buffer_length,
u8 **output_buffer)
{
ACPI_STATUS status;
u32 bytes_parsed = 0;
u8 resource_type = 0;
u32 bytes_consumed = 0;
u8 **buffer = output_buffer;
u32 structure_size = 0;
u8 end_tag_processed = FALSE;
while (bytes_parsed < byte_stream_buffer_length &&
FALSE == end_tag_processed)
{
/*
* 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
*/
status = acpi_rs_memory24_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case LARGE_VENDOR_DEFINED:
/*
* Vendor Defined Resource
*/
status = acpi_rs_vendor_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case MEMORY_RANGE_32:
/*
* 32-Bit Memory Range Resource
*/
status = acpi_rs_memory32_range_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case FIXED_MEMORY_RANGE_32:
/*
* 32-Bit Fixed Memory Resource
*/
status = acpi_rs_fixed_memory32_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case DWORD_ADDRESS_SPACE:
/*
* 32-Bit Address Resource
*/
status = acpi_rs_address32_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case WORD_ADDRESS_SPACE:
/*
* 16-Bit Address Resource
*/
status = acpi_rs_address16_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case EXTENDED_IRQ:
/*
* Extended IRQ
*/
status = acpi_rs_extended_irq_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
/* 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
*/
status = acpi_rs_irq_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case DMA_FORMAT:
/*
* DMA Resource
*/
status = acpi_rs_dma_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case START_DEPENDENT_TAG:
/*
* Start Dependent Functions Resource
*/
status = acpi_rs_start_dependent_functions_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case END_DEPENDENT_TAG:
/*
* End Dependent Functions Resource
*/
status = acpi_rs_end_dependent_functions_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case IO_PORT_DESCRIPTOR:
/*
* IO Port Resource
*/
status = acpi_rs_io_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case FIXED_LOCATION_IO_DESCRIPTOR:
/*
* Fixed IO Port Resource
*/
status = acpi_rs_fixed_io_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case SMALL_VENDOR_DEFINED:
/*
* Vendor Specific Resource
*/
status = acpi_rs_vendor_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
break;
case END_TAG:
/*
* End Tag
*/
status = acpi_rs_end_tag_resource(byte_stream_buffer,
&bytes_consumed,
buffer,
&structure_size);
end_tag_processed = TRUE;
break;
default:
/*
* If we get here, everything is out of sync,
* so exit with an error
*/
return (AE_AML_ERROR);
break;
} /* switch */
} /* end else */
/*
* Update the return value and counter
*/
bytes_parsed += bytes_consumed;
/*
* Set the byte stream to point to the next resource
*/
byte_stream_buffer += bytes_consumed;
/*
* Set the Buffer to the next structure
*/
*buffer += structure_size;
} /* end while */
/*
* Check the reason for exiting the while loop
*/
if (!(byte_stream_buffer_length == bytes_parsed) ||
(TRUE != end_tag_processed))
{
return (AE_AML_ERROR);
}
return (AE_OK);
} /* Acpi_rs_byte_stream_to_list */
/***************************************************************************
* FUNCTION: Acpi_rs_list_to_byte_stream
*
* PARAMETERS:
* Linked_list - Pointer to the resource linked list
* Byte_steam_size_needed - Calculated size of the byte stream
* needed from calling
* Acpi_rs_calculate_byte_stream_length()
* The size of the Output_buffer is
* guaranteed to be >=
* Byte_stream_size_needed
* Output_buffer - Pointer to the buffer that will
* contain the byte stream
*
* RETURN: Status AE_OK if okay, else a valid ACPI_STATUS code
*
* 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_list_to_byte_stream (
RESOURCE *linked_list,
u32 byte_stream_size_needed,
u8 **output_buffer)
{
ACPI_STATUS status;
u8 *buffer = *output_buffer;
u32 bytes_consumed = 0;
u8 done = FALSE;
while (!done) {
switch (linked_list->id)
{
case irq:
/*
* IRQ Resource
*/
status = acpi_rs_irq_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case dma:
/*
* DMA Resource
*/
status = acpi_rs_dma_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case start_dependent_functions:
/*
* Start Dependent Functions Resource
*/
status = acpi_rs_start_dependent_functions_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case end_dependent_functions:
/*
* End Dependent Functions Resource
*/
status = acpi_rs_end_dependent_functions_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case io:
/*
* IO Port Resource
*/
status = acpi_rs_io_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case fixed_io:
/*
* Fixed IO Port Resource
*/
status = acpi_rs_fixed_io_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case vendor_specific:
/*
* Vendor Defined Resource
*/
status = acpi_rs_vendor_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case end_tag:
/*
* End Tag
*/
status = acpi_rs_end_tag_stream (linked_list,
&buffer,
&bytes_consumed);
/*
* An End Tag indicates the end of the Resource Template
*/
done = TRUE;
break;
case memory24:
/*
* 24-Bit Memory Resource
*/
status = acpi_rs_memory24_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case memory32:
/*
* 32-Bit Memory Range Resource
*/
status = acpi_rs_memory32_range_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case fixed_memory32:
/*
* 32-Bit Fixed Memory Resource
*/
status = acpi_rs_fixed_memory32_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case address16:
/*
* 16-Bit Address Descriptor Resource
*/
status = acpi_rs_address16_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case address32:
/*
* 32-Bit Address Descriptor Resource
*/
status = acpi_rs_address32_stream (linked_list,
&buffer,
&bytes_consumed);
break;
case extended_irq:
/*
* Extended IRQ Resource
*/
status = acpi_rs_extended_irq_stream (linked_list,
&buffer,
&bytes_consumed);
break;
default:
/*
* If we get here, everything is out of sync,
* so exit with an error
*/
return (AE_BAD_DATA);
break;
} /* switch (Linked_list->Id) */
/*
* Set the Buffer to point to the open byte
*/
buffer += bytes_consumed;
/*
* Point to the next object
*/
linked_list = (RESOURCE *) ((NATIVE_UINT) linked_list +
(NATIVE_UINT) linked_list->length);
}
return (AE_OK);
} /* Acpi_rs_list_to_byte_stream */
|
