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/*******************************************************************************
*
* Module Name: rscreate - Create resource lists/tables
* $Revision: 36 $
*
******************************************************************************/
/*
* 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 ("rscreate")
/*******************************************************************************
*
* FUNCTION: Acpi_rs_create_resource_list
*
* PARAMETERS: Byte_stream_buffer - Pointer to the resource byte stream
* Output_buffer - Pointer to the user's buffer
* Output_buffer_length - Pointer to the size of Output_buffer
*
* RETURN: Status - AE_OK if okay, else a valid acpi_status code
* If Output_buffer is not large enough, Output_buffer_length
* indicates how large Output_buffer should be, else it
* indicates how may u8 elements of Output_buffer are valid.
*
* DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
* execution and parses the stream to create a linked list
* of device resources.
*
******************************************************************************/
acpi_status
acpi_rs_create_resource_list (
acpi_operand_object *byte_stream_buffer,
u8 *output_buffer,
u32 *output_buffer_length)
{
acpi_status status;
u8 *byte_stream_start;
u32 list_size_needed = 0;
u32 byte_stream_buffer_length;
FUNCTION_TRACE ("Rs_create_resource_list");
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Byte_stream_buffer = %p\n", byte_stream_buffer));
/*
* Params already validated, so we don't re-validate here
*/
byte_stream_buffer_length = byte_stream_buffer->buffer.length;
byte_stream_start = byte_stream_buffer->buffer.pointer;
/*
* Pass the Byte_stream_buffer into a module that can calculate
* the buffer size needed for the linked list
*/
status = acpi_rs_calculate_list_length (byte_stream_start, byte_stream_buffer_length,
&list_size_needed);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status=%X List_size_needed=%X\n",
status, list_size_needed));
/*
* Exit with the error passed back
*/
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/*
* If the linked list will fit into the available buffer
* call to fill in the list
*/
if (list_size_needed <= *output_buffer_length) {
/*
* Zero out the return buffer before proceeding
*/
MEMSET (output_buffer, 0x00, *output_buffer_length);
status = acpi_rs_byte_stream_to_list (byte_stream_start, byte_stream_buffer_length,
&output_buffer);
/*
* Exit with the error passed back
*/
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Output_buffer = %p\n", output_buffer));
}
else {
*output_buffer_length = list_size_needed;
return_ACPI_STATUS (AE_BUFFER_OVERFLOW);
}
*output_buffer_length = list_size_needed;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_rs_create_pci_routing_table
*
* PARAMETERS: Package_object - Pointer to an acpi_operand_object
* package
* Output_buffer - Pointer to the user's buffer
* Output_buffer_length - Size of Output_buffer
*
* RETURN: Status AE_OK if okay, else a valid acpi_status code.
* If the Output_buffer is too small, the error will be
* AE_BUFFER_OVERFLOW and Output_buffer_length will point
* to the size buffer needed.
*
* DESCRIPTION: Takes the acpi_operand_object package and creates a
* linked list of PCI interrupt descriptions
*
******************************************************************************/
acpi_status
acpi_rs_create_pci_routing_table (
acpi_operand_object *package_object,
u8 *output_buffer,
u32 *output_buffer_length)
{
u8 *buffer = output_buffer;
acpi_operand_object **top_object_list = NULL;
acpi_operand_object **sub_object_list = NULL;
acpi_operand_object *package_element = NULL;
u32 buffer_size_needed = 0;
u32 number_of_elements = 0;
u32 index = 0;
pci_routing_table *user_prt = NULL;
acpi_namespace_node *node;
acpi_status status;
FUNCTION_TRACE ("Rs_create_pci_routing_table");
/*
* Params already validated, so we don't re-validate here
*/
status = acpi_rs_calculate_pci_routing_table_length (package_object,
&buffer_size_needed);
if (!ACPI_SUCCESS(status)) {
return_ACPI_STATUS (status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Buffer_size_needed = %X\n", buffer_size_needed));
/*
* If the data will fit into the available buffer
* call to fill in the list
*/
if (buffer_size_needed <= *output_buffer_length) {
/*
* Zero out the return buffer before proceeding
*/
MEMSET (output_buffer, 0x00, *output_buffer_length);
/*
* Loop through the ACPI_INTERNAL_OBJECTS - Each object should
* contain a u32 Address, a u8 Pin, a Name and a u8
* Source_index.
*/
top_object_list = package_object->package.elements;
number_of_elements = package_object->package.count;
user_prt = (pci_routing_table *) buffer;
buffer = ROUND_PTR_UP_TO_8 (buffer, u8);
for (index = 0; index < number_of_elements; index++) {
/*
* Point User_prt past this current structure
*
* NOTE: On the first iteration, User_prt->Length will
* be zero because we cleared the return buffer earlier
*/
buffer += user_prt->length;
user_prt = (pci_routing_table *) buffer;
/*
* Fill in the Length field with the information we
* have at this point.
* The minus four is to subtract the size of the
* u8 Source[4] member because it is added below.
*/
user_prt->length = (sizeof (pci_routing_table) -4);
/*
* 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;
/*
* 1) First subobject: Dereference the Address
*/
if (ACPI_TYPE_INTEGER == (*sub_object_list)->common.type) {
user_prt->address = (*sub_object_list)->integer.value;
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Need Integer, found %s\n",
acpi_ut_get_type_name ((*sub_object_list)->common.type)));
return_ACPI_STATUS (AE_BAD_DATA);
}
/*
* 2) Second subobject: Dereference the Pin
*/
sub_object_list++;
if (ACPI_TYPE_INTEGER == (*sub_object_list)->common.type) {
user_prt->pin = (u32) (*sub_object_list)->integer.value;
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Need Integer, found %s\n",
acpi_ut_get_type_name ((*sub_object_list)->common.type)));
return_ACPI_STATUS (AE_BAD_DATA);
}
/*
* 3) Third subobject: Dereference the Source Name
*/
sub_object_list++;
switch ((*sub_object_list)->common.type) {
case INTERNAL_TYPE_REFERENCE:
if ((*sub_object_list)->reference.opcode != AML_INT_NAMEPATH_OP) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Need name, found reference op %X\n",
(*sub_object_list)->reference.opcode));
return_ACPI_STATUS (AE_BAD_DATA);
}
node = (*sub_object_list)->reference.node;
/* TBD: use *remaining* length of the buffer! */
status = acpi_ns_handle_to_pathname ((acpi_handle *) node,
output_buffer_length, user_prt->source);
user_prt->length += STRLEN (user_prt->source) + 1; /* include null terminator */
break;
case ACPI_TYPE_STRING:
STRCPY (user_prt->source,
(*sub_object_list)->string.pointer);
/*
* Add to the Length field the length of the string
*/
user_prt->length += (*sub_object_list)->string.length;
break;
case ACPI_TYPE_INTEGER:
/*
* If this is a number, then the Source Name
* is NULL, since the entire buffer was zeroed
* out, we can leave this alone.
*/
/*
* Add to the Length field the length of
* the u32 NULL
*/
user_prt->length += sizeof (u32);
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Need Integer, found %s\n",
acpi_ut_get_type_name ((*sub_object_list)->common.type)));
return_ACPI_STATUS (AE_BAD_DATA);
break;
}
/* Now align the current length */
user_prt->length = ROUND_UP_TO_64_bITS (user_prt->length);
/*
* 4) Fourth subobject: Dereference the Source Index
*/
sub_object_list++;
if (ACPI_TYPE_INTEGER == (*sub_object_list)->common.type) {
user_prt->source_index = (u32) (*sub_object_list)->integer.value;
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Need Integer, found %s\n",
acpi_ut_get_type_name ((*sub_object_list)->common.type)));
return_ACPI_STATUS (AE_BAD_DATA);
}
/*
* Point to the next acpi_operand_object
*/
top_object_list++;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Output_buffer = %p\n", output_buffer));
}
else {
*output_buffer_length = buffer_size_needed;
return_ACPI_STATUS (AE_BUFFER_OVERFLOW);
}
/*
* Report the amount of buffer used
*/
*output_buffer_length = buffer_size_needed;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_rs_create_byte_stream
*
* PARAMETERS: Linked_list_buffer - Pointer to the resource linked list
* Output_buffer - Pointer to the user's buffer
* Output_buffer_length - Size of Output_buffer
*
* RETURN: Status AE_OK if okay, else a valid acpi_status code.
* If the Output_buffer is too small, the error will be
* AE_BUFFER_OVERFLOW and Output_buffer_length will point
* to the size buffer needed.
*
* DESCRIPTION: Takes the linked list of device resources and
* creates a bytestream to be used as input for the
* _SRS control method.
*
******************************************************************************/
acpi_status
acpi_rs_create_byte_stream (
acpi_resource *linked_list_buffer,
u8 *output_buffer,
u32 *output_buffer_length)
{
acpi_status status;
u32 byte_stream_size_needed = 0;
FUNCTION_TRACE ("Rs_create_byte_stream");
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Linked_list_buffer = %p\n", linked_list_buffer));
/*
* Params already validated, so we don't re-validate here
*
* Pass the Linked_list_buffer into a module that can calculate
* the buffer size needed for the byte stream.
*/
status = acpi_rs_calculate_byte_stream_length (linked_list_buffer,
&byte_stream_size_needed);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Byte_stream_size_needed=%X, %s\n",
byte_stream_size_needed, acpi_format_exception (status)));
/*
* Exit with the error passed back
*/
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/*
* If the linked list will fit into the available buffer
* call to fill in the list
*/
if (byte_stream_size_needed <= *output_buffer_length) {
/*
* Zero out the return buffer before proceeding
*/
MEMSET (output_buffer, 0x00, *output_buffer_length);
status = acpi_rs_list_to_byte_stream (linked_list_buffer, byte_stream_size_needed,
&output_buffer);
/*
* Exit with the error passed back
*/
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Output_buffer = %p\n", output_buffer));
}
else {
*output_buffer_length = byte_stream_size_needed;
return_ACPI_STATUS (AE_BUFFER_OVERFLOW);
}
return_ACPI_STATUS (AE_OK);
}
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