linux/drivers/acpi/resources/rsmisc.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

598 lines
18 KiB
C

/*******************************************************************************
*
* Module Name: rsmisc - Miscellaneous resource descriptors
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include <acpi/acresrc.h>
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME ("rsmisc")
/*******************************************************************************
*
* FUNCTION: acpi_rs_end_tag_resource
*
* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
* stream
* bytes_consumed - Pointer to where the number of bytes
* consumed the byte_stream_buffer is
* returned
* output_buffer - Pointer to the return data buffer
* structure_size - Pointer to where the number of bytes
* in the return data struct is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the resource byte stream and fill out the appropriate
* structure pointed to by the output_buffer. Return the
* number of bytes consumed from the byte stream.
*
******************************************************************************/
acpi_status
acpi_rs_end_tag_resource (
u8 *byte_stream_buffer,
acpi_size *bytes_consumed,
u8 **output_buffer,
acpi_size *structure_size)
{
struct acpi_resource *output_struct = (void *) *output_buffer;
acpi_size struct_size = ACPI_RESOURCE_LENGTH;
ACPI_FUNCTION_TRACE ("rs_end_tag_resource");
/*
* The number of bytes consumed is static
*/
*bytes_consumed = 2;
/*
* Fill out the structure
*/
output_struct->id = ACPI_RSTYPE_END_TAG;
/*
* Set the Length parameter
*/
output_struct->length = 0;
/*
* Return the final size of the structure
*/
*structure_size = struct_size;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_end_tag_stream
*
* PARAMETERS: linked_list - Pointer to the resource linked list
* output_buffer - Pointer to the user's return buffer
* bytes_consumed - Pointer to where the number of bytes
* used in the output_buffer is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the linked list resource structure and fills in the
* the appropriate bytes in a byte stream
*
******************************************************************************/
acpi_status
acpi_rs_end_tag_stream (
struct acpi_resource *linked_list,
u8 **output_buffer,
acpi_size *bytes_consumed)
{
u8 *buffer = *output_buffer;
u8 temp8 = 0;
ACPI_FUNCTION_TRACE ("rs_end_tag_stream");
/*
* The descriptor field is static
*/
*buffer = 0x79;
buffer += 1;
/*
* Set the Checksum - zero means that the resource data is treated as if
* the checksum operation succeeded (ACPI Spec 1.0b Section 6.4.2.8)
*/
temp8 = 0;
*buffer = temp8;
buffer += 1;
/*
* Return the number of bytes consumed in this operation
*/
*bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_vendor_resource
*
* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
* stream
* bytes_consumed - Pointer to where the number of bytes
* consumed the byte_stream_buffer is
* returned
* output_buffer - Pointer to the return data buffer
* structure_size - Pointer to where the number of bytes
* in the return data struct is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the resource byte stream and fill out the appropriate
* structure pointed to by the output_buffer. Return the
* number of bytes consumed from the byte stream.
*
******************************************************************************/
acpi_status
acpi_rs_vendor_resource (
u8 *byte_stream_buffer,
acpi_size *bytes_consumed,
u8 **output_buffer,
acpi_size *structure_size)
{
u8 *buffer = byte_stream_buffer;
struct acpi_resource *output_struct = (void *) *output_buffer;
u16 temp16 = 0;
u8 temp8 = 0;
u8 index;
acpi_size struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_vendor);
ACPI_FUNCTION_TRACE ("rs_vendor_resource");
/*
* Dereference the Descriptor to find if this is a large or small item.
*/
temp8 = *buffer;
if (temp8 & 0x80) {
/*
* Large Item, point to the length field
*/
buffer += 1;
/* Dereference */
ACPI_MOVE_16_TO_16 (&temp16, buffer);
/* Calculate bytes consumed */
*bytes_consumed = (acpi_size) temp16 + 3;
/* Point to the first vendor byte */
buffer += 2;
}
else {
/*
* Small Item, dereference the size
*/
temp16 = (u8)(*buffer & 0x07);
/* Calculate bytes consumed */
*bytes_consumed = (acpi_size) temp16 + 1;
/* Point to the first vendor byte */
buffer += 1;
}
output_struct->id = ACPI_RSTYPE_VENDOR;
output_struct->data.vendor_specific.length = temp16;
for (index = 0; index < temp16; index++) {
output_struct->data.vendor_specific.reserved[index] = *buffer;
buffer += 1;
}
/*
* In order for the struct_size to fall on a 32-bit boundary,
* calculate the length of the vendor string and expand the
* struct_size to the next 32-bit boundary.
*/
struct_size += ACPI_ROUND_UP_to_32_bITS (temp16);
/*
* Set the Length parameter
*/
output_struct->length = (u32) struct_size;
/*
* Return the final size of the structure
*/
*structure_size = struct_size;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_vendor_stream
*
* PARAMETERS: linked_list - Pointer to the resource linked list
* output_buffer - Pointer to the user's return buffer
* bytes_consumed - Pointer to where the number of bytes
* used in the output_buffer is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the linked list resource structure and fills in the
* the appropriate bytes in a byte stream
*
******************************************************************************/
acpi_status
acpi_rs_vendor_stream (
struct acpi_resource *linked_list,
u8 **output_buffer,
acpi_size *bytes_consumed)
{
u8 *buffer = *output_buffer;
u16 temp16 = 0;
u8 temp8 = 0;
u8 index;
ACPI_FUNCTION_TRACE ("rs_vendor_stream");
/*
* Dereference the length to find if this is a large or small item.
*/
if(linked_list->data.vendor_specific.length > 7) {
/*
* Large Item, Set the descriptor field and length bytes
*/
*buffer = 0x84;
buffer += 1;
temp16 = (u16) linked_list->data.vendor_specific.length;
ACPI_MOVE_16_TO_16 (buffer, &temp16);
buffer += 2;
}
else {
/*
* Small Item, Set the descriptor field
*/
temp8 = 0x70;
temp8 |= (u8) linked_list->data.vendor_specific.length;
*buffer = temp8;
buffer += 1;
}
/*
* Loop through all of the Vendor Specific fields
*/
for (index = 0; index < linked_list->data.vendor_specific.length; index++) {
temp8 = linked_list->data.vendor_specific.reserved[index];
*buffer = temp8;
buffer += 1;
}
/*
* Return the number of bytes consumed in this operation
*/
*bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_start_depend_fns_resource
*
* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
* stream
* bytes_consumed - Pointer to where the number of bytes
* consumed the byte_stream_buffer is
* returned
* output_buffer - Pointer to the return data buffer
* structure_size - Pointer to where the number of bytes
* in the return data struct is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the resource byte stream and fill out the appropriate
* structure pointed to by the output_buffer. Return the
* number of bytes consumed from the byte stream.
*
******************************************************************************/
acpi_status
acpi_rs_start_depend_fns_resource (
u8 *byte_stream_buffer,
acpi_size *bytes_consumed,
u8 **output_buffer,
acpi_size *structure_size)
{
u8 *buffer = byte_stream_buffer;
struct acpi_resource *output_struct = (void *) *output_buffer;
u8 temp8 = 0;
acpi_size struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_start_dpf);
ACPI_FUNCTION_TRACE ("rs_start_depend_fns_resource");
/*
* The number of bytes consumed are contained in the descriptor (Bits:0-1)
*/
temp8 = *buffer;
*bytes_consumed = (temp8 & 0x01) + 1;
output_struct->id = ACPI_RSTYPE_START_DPF;
/*
* Point to Byte 1 if it is used
*/
if (2 == *bytes_consumed) {
buffer += 1;
temp8 = *buffer;
/*
* Check Compatibility priority
*/
output_struct->data.start_dpf.compatibility_priority = temp8 & 0x03;
if (3 == output_struct->data.start_dpf.compatibility_priority) {
return_ACPI_STATUS (AE_AML_BAD_RESOURCE_VALUE);
}
/*
* Check Performance/Robustness preference
*/
output_struct->data.start_dpf.performance_robustness = (temp8 >> 2) & 0x03;
if (3 == output_struct->data.start_dpf.performance_robustness) {
return_ACPI_STATUS (AE_AML_BAD_RESOURCE_VALUE);
}
}
else {
output_struct->data.start_dpf.compatibility_priority =
ACPI_ACCEPTABLE_CONFIGURATION;
output_struct->data.start_dpf.performance_robustness =
ACPI_ACCEPTABLE_CONFIGURATION;
}
/*
* Set the Length parameter
*/
output_struct->length = (u32) struct_size;
/*
* Return the final size of the structure
*/
*structure_size = struct_size;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_end_depend_fns_resource
*
* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
* stream
* bytes_consumed - Pointer to where the number of bytes
* consumed the byte_stream_buffer is
* returned
* output_buffer - Pointer to the return data buffer
* structure_size - Pointer to where the number of bytes
* in the return data struct is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the resource byte stream and fill out the appropriate
* structure pointed to by the output_buffer. Return the
* number of bytes consumed from the byte stream.
*
******************************************************************************/
acpi_status
acpi_rs_end_depend_fns_resource (
u8 *byte_stream_buffer,
acpi_size *bytes_consumed,
u8 **output_buffer,
acpi_size *structure_size)
{
struct acpi_resource *output_struct = (void *) *output_buffer;
acpi_size struct_size = ACPI_RESOURCE_LENGTH;
ACPI_FUNCTION_TRACE ("rs_end_depend_fns_resource");
/*
* The number of bytes consumed is static
*/
*bytes_consumed = 1;
/*
* Fill out the structure
*/
output_struct->id = ACPI_RSTYPE_END_DPF;
/*
* Set the Length parameter
*/
output_struct->length = (u32) struct_size;
/*
* Return the final size of the structure
*/
*structure_size = struct_size;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_start_depend_fns_stream
*
* PARAMETERS: linked_list - Pointer to the resource linked list
* output_buffer - Pointer to the user's return buffer
* bytes_consumed - u32 pointer that is filled with
* the number of bytes of the
* output_buffer used
*
* RETURN: Status
*
* DESCRIPTION: Take the linked list resource structure and fills in the
* the appropriate bytes in a byte stream
*
******************************************************************************/
acpi_status
acpi_rs_start_depend_fns_stream (
struct acpi_resource *linked_list,
u8 **output_buffer,
acpi_size *bytes_consumed)
{
u8 *buffer = *output_buffer;
u8 temp8 = 0;
ACPI_FUNCTION_TRACE ("rs_start_depend_fns_stream");
/*
* The descriptor field is set based upon whether a byte is needed
* to contain Priority data.
*/
if (ACPI_ACCEPTABLE_CONFIGURATION ==
linked_list->data.start_dpf.compatibility_priority &&
ACPI_ACCEPTABLE_CONFIGURATION ==
linked_list->data.start_dpf.performance_robustness) {
*buffer = 0x30;
}
else {
*buffer = 0x31;
buffer += 1;
/*
* Set the Priority Byte Definition
*/
temp8 = 0;
temp8 = (u8) ((linked_list->data.start_dpf.performance_robustness &
0x03) << 2);
temp8 |= (linked_list->data.start_dpf.compatibility_priority &
0x03);
*buffer = temp8;
}
buffer += 1;
/*
* Return the number of bytes consumed in this operation
*/
*bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_end_depend_fns_stream
*
* PARAMETERS: linked_list - Pointer to the resource linked list
* output_buffer - Pointer to the user's return buffer
* bytes_consumed - Pointer to where the number of bytes
* used in the output_buffer is returned
*
* RETURN: Status
*
* DESCRIPTION: Take the linked list resource structure and fills in the
* the appropriate bytes in a byte stream
*
******************************************************************************/
acpi_status
acpi_rs_end_depend_fns_stream (
struct acpi_resource *linked_list,
u8 **output_buffer,
acpi_size *bytes_consumed)
{
u8 *buffer = *output_buffer;
ACPI_FUNCTION_TRACE ("rs_end_depend_fns_stream");
/*
* The descriptor field is static
*/
*buffer = 0x38;
buffer += 1;
/*
* Return the number of bytes consumed in this operation
*/
*bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
return_ACPI_STATUS (AE_OK);
}