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linux/drivers/acpi/resources/rscalc.c
Robert Moore 44f6c01242 ACPICA 20050408 from Bob Moore 
Fixed three cases in the interpreter where an "index"
argument to an ASL function was still (internally) 32
bits instead of the required 64 bits.  This was the Index
argument to the Index, Mid, and Match operators.

The "strupr" function is now permanently local
(acpi_ut_strupr), since this is not a POSIX-defined
function and not present in most kernel-level C
libraries. References to the C library strupr function
have been removed from the headers.

Completed the deployment of static
functions/prototypes. All prototypes with the static
attribute have been moved from the headers to the owning
C file.

ACPICA 20050329 from Bob Moore

An error is now generated if an attempt is made to create
a Buffer Field of length zero (A CreateField with a length
operand of zero.)

The interpreter now issues a warning whenever executable
code at the module level is detected during ACPI table
load. This will give some idea of the prevalence of this
type of code.

Implemented support for references to named objects (other
than control methods) within package objects.

Enhanced package object output for the debug
object. Package objects are now completely dumped, showing
all elements.

Enhanced miscellaneous object output for the debug
object. Any object can now be written to the debug object
(for example, a device object can be written, and the type
of the object will be displayed.)

The "static" qualifier has been added to all local
functions across the core subsystem.

The number of "long" lines (> 80 chars) within the source
has been significantly reduced, by about 1/3.

Cleaned up all header files to ensure that all CA/iASL
functions are prototyped (even static functions) and the
formatting is consistent.

Two new header files have been added, acopcode.h and
acnames.h.

Removed several obsolete functions that were no longer
used.

Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-12 00:08:52 -04:00

832 lines
22 KiB
C
Raw Blame History

/*******************************************************************************
*
* Module Name: rscalc - Calculate stream and list lengths
*
******************************************************************************/
/*
* 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>
#include <acpi/amlcode.h>
#include <acpi/acnamesp.h>
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME ("rscalc")
/*******************************************************************************
*
* FUNCTION: acpi_rs_get_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_get_byte_stream_length (
struct acpi_resource *linked_list,
acpi_size *size_needed)
{
acpi_size byte_stream_size_needed = 0;
acpi_size segment_size;
u8 done = FALSE;
ACPI_FUNCTION_TRACE ("rs_get_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 (linked_list->data.address16.resource_source.string_ptr) {
segment_size +=
linked_list->data.address16.resource_source.string_length;
segment_size++;
}
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 (linked_list->data.address32.resource_source.string_ptr) {
segment_size +=
linked_list->data.address32.resource_source.string_length;
segment_size++;
}
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 (linked_list->data.address64.resource_source.string_ptr) {
segment_size +=
linked_list->data.address64.resource_source.string_length;
segment_size++;
}
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 + (((acpi_size)
linked_list->data.extended_irq.number_of_interrupts - 1) * 4);
if (linked_list->data.extended_irq.resource_source.string_ptr) {
segment_size +=
linked_list->data.extended_irq.resource_source.string_length;
segment_size++;
}
break;
default:
/* If we get here, everything is out of sync, exit with error */
return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
} /* switch (linked_list->Id) */
/* Update the total */
byte_stream_size_needed += segment_size;
/* Point to the next object */
linked_list = ACPI_PTR_ADD (struct 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_get_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_get_list_length (
u8 *byte_stream_buffer,
u32 byte_stream_buffer_length,
acpi_size *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;
ACPI_FUNCTION_TRACE ("rs_get_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 ACPI_RDESC_TYPE_MEMORY_24:
/*
* 24-Bit Memory Resource
*/
bytes_consumed = 12;
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_mem24);
break;
case ACPI_RDESC_TYPE_LARGE_VENDOR:
/*
* Vendor Defined Resource
*/
buffer = byte_stream_buffer;
++buffer;
ACPI_MOVE_16_TO_16 (&temp16, buffer);
bytes_consumed = temp16 + 3;
/* Ensure a 32-bit boundary for the structure */
temp16 = (u16) ACPI_ROUND_UP_to_32_bITS (temp16);
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_vendor) +
(temp16 * sizeof (u8));
break;
case ACPI_RDESC_TYPE_MEMORY_32:
/*
* 32-Bit Memory Range Resource
*/
bytes_consumed = 20;
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_mem32);
break;
case ACPI_RDESC_TYPE_FIXED_MEMORY_32:
/*
* 32-Bit Fixed Memory Resource
*/
bytes_consumed = 12;
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_fixed_mem32);
break;
case ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE:
/*
* 64-Bit Address Resource
*/
buffer = byte_stream_buffer;
++buffer;
ACPI_MOVE_16_TO_16 (&temp16, buffer);
bytes_consumed = temp16 + 3;
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_address64);
break;
case ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE:
/*
* 64-Bit Address Resource
*/
buffer = byte_stream_buffer;
++buffer;
ACPI_MOVE_16_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
* terminated 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 terminated string.
*/
if (43 < temp16) {
temp8 = (u8) (temp16 - 44);
}
else {
temp8 = 0;
}
/* Ensure a 64-bit boundary for the structure */
temp8 = (u8) ACPI_ROUND_UP_to_64_bITS (temp8);
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_address64) +
(temp8 * sizeof (u8));
break;
case ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE:
/*
* 32-Bit Address Resource
*/
buffer = byte_stream_buffer;
++buffer;
ACPI_MOVE_16_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
* terminated 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 terminated string.
*/
if (23 < temp16) {
temp8 = (u8) (temp16 - 24);
}
else {
temp8 = 0;
}
/* Ensure a 32-bit boundary for the structure */
temp8 = (u8) ACPI_ROUND_UP_to_32_bITS (temp8);
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_address32) +
(temp8 * sizeof (u8));
break;
case ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE:
/*
* 16-Bit Address Resource
*/
buffer = byte_stream_buffer;
++buffer;
ACPI_MOVE_16_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
* terminated 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 terminated string.
*/
if (13 < temp16) {
temp8 = (u8) (temp16 - 14);
}
else {
temp8 = 0;
}
/* Ensure a 32-bit boundary for the structure */
temp8 = (u8) ACPI_ROUND_UP_to_32_bITS (temp8);
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_address16) +
(temp8 * sizeof (u8));
break;
case ACPI_RDESC_TYPE_EXTENDED_XRUPT:
/*
* Extended IRQ
*/
buffer = byte_stream_buffer;
++buffer;
ACPI_MOVE_16_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
* terminated 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 terminated 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) ACPI_ROUND_UP_to_32_bITS (temp8);
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_ext_irq) +
(additional_bytes * sizeof (u8)) +
(temp8 * sizeof (u8));
break;
case ACPI_RDESC_TYPE_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 */
ACPI_MOVE_16_TO_16 (&temp16, buffer);
for (index = 0; index < 16; index++) {
if (temp16 & 0x1) {
++number_of_interrupts;
}
temp16 >>= 1;
}
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_io) +
(number_of_interrupts * sizeof (u32));
break;
case ACPI_RDESC_TYPE_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 = ACPI_SIZEOF_RESOURCE (struct acpi_resource_dma) +
(number_of_channels * sizeof (u32));
break;
case ACPI_RDESC_TYPE_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 = ACPI_SIZEOF_RESOURCE (struct acpi_resource_start_dpf);
break;
case ACPI_RDESC_TYPE_END_DEPENDENT:
/*
* End Dependent Functions Resource
*/
bytes_consumed = 1;
structure_size = ACPI_RESOURCE_LENGTH;
break;
case ACPI_RDESC_TYPE_IO_PORT:
/*
* IO Port Resource
*/
bytes_consumed = 8;
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_io);
break;
case ACPI_RDESC_TYPE_FIXED_IO_PORT:
/*
* Fixed IO Port Resource
*/
bytes_consumed = 4;
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_fixed_io);
break;
case ACPI_RDESC_TYPE_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) ACPI_ROUND_UP_to_32_bITS (temp8);
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_vendor) +
(temp8 * sizeof (u8));
break;
case ACPI_RDESC_TYPE_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,
* exit with an error
*/
return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
}
/* Update the return value and counter */
buffer_size += (u32) ACPI_ALIGN_RESOURCE_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_get_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_get_pci_routing_table_length (
union acpi_operand_object *package_object,
acpi_size *buffer_size_needed)
{
u32 number_of_elements;
acpi_size temp_size_needed = 0;
union acpi_operand_object **top_object_list;
u32 index;
union acpi_operand_object *package_element;
union acpi_operand_object **sub_object_list;
u8 name_found;
u32 table_index;
ACPI_FUNCTION_TRACE ("rs_get_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 ==
ACPI_GET_OBJECT_TYPE (*sub_object_list)) ||
((ACPI_TYPE_LOCAL_REFERENCE ==
ACPI_GET_OBJECT_TYPE (*sub_object_list)) &&
((*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 (struct acpi_pci_routing_table) - 4);
/* Was a String type found? */
if (name_found) {
if (ACPI_GET_OBJECT_TYPE (*sub_object_list) == ACPI_TYPE_STRING) {
/*
* The length String.Length field does not include the
* terminating NULL, add 1
*/
temp_size_needed += ((acpi_size)
(*sub_object_list)->string.length + 1);
}
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 = ACPI_ROUND_UP_to_64_bITS (temp_size_needed);
/* Point to the next union 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 (struct acpi_pci_routing_table);
return_ACPI_STATUS (AE_OK);
}
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