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!
This commit is contained in:
Linus Torvalds
841
drivers/acpi/resources/rscalc.c
Normal file
841
drivers/acpi/resources/rscalc.c
Normal file
@@ -0,0 +1,841 @@
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/*******************************************************************************
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*
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* Module Name: rscalc - Calculate stream and list lengths
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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||||
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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||||
* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acresrc.h>
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#include <acpi/amlcode.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_RESOURCES
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ACPI_MODULE_NAME ("rscalc")
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_byte_stream_length
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*
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* PARAMETERS: linked_list - Pointer to the resource linked list
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* size_needed - u32 pointer of the size buffer needed
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* to properly return the parsed data
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*
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* RETURN: Status
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*
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* DESCRIPTION: Takes the resource byte stream and parses it once, calculating
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* the size buffer needed to hold the linked list that conveys
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* the resource data.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_get_byte_stream_length (
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struct acpi_resource *linked_list,
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acpi_size *size_needed)
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{
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acpi_size byte_stream_size_needed = 0;
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acpi_size segment_size;
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u8 done = FALSE;
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ACPI_FUNCTION_TRACE ("rs_get_byte_stream_length");
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while (!done) {
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/*
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* Init the variable that will hold the size to add to the total.
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*/
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segment_size = 0;
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switch (linked_list->id) {
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case ACPI_RSTYPE_IRQ:
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/*
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* IRQ Resource
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* For an IRQ Resource, Byte 3, although optional, will always be
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* created - it holds IRQ information.
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*/
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segment_size = 4;
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break;
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case ACPI_RSTYPE_DMA:
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/*
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* DMA Resource
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* For this resource the size is static
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*/
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segment_size = 3;
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break;
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case ACPI_RSTYPE_START_DPF:
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/*
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* Start Dependent Functions Resource
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* For a start_dependent_functions Resource, Byte 1, although
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* optional, will always be created.
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*/
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segment_size = 2;
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break;
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case ACPI_RSTYPE_END_DPF:
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/*
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* End Dependent Functions Resource
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* For this resource the size is static
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*/
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segment_size = 1;
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break;
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case ACPI_RSTYPE_IO:
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/*
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* IO Port Resource
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* For this resource the size is static
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*/
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segment_size = 8;
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break;
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case ACPI_RSTYPE_FIXED_IO:
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/*
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* Fixed IO Port Resource
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* For this resource the size is static
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*/
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segment_size = 4;
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break;
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case ACPI_RSTYPE_VENDOR:
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/*
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* Vendor Defined Resource
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* For a Vendor Specific resource, if the Length is between 1 and 7
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* it will be created as a Small Resource data type, otherwise it
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* is a Large Resource data type.
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*/
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if (linked_list->data.vendor_specific.length > 7) {
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segment_size = 3;
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}
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else {
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segment_size = 1;
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}
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segment_size += linked_list->data.vendor_specific.length;
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break;
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case ACPI_RSTYPE_END_TAG:
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/*
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* End Tag
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* For this resource the size is static
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*/
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segment_size = 2;
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done = TRUE;
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break;
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case ACPI_RSTYPE_MEM24:
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/*
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* 24-Bit Memory Resource
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* For this resource the size is static
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*/
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segment_size = 12;
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break;
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case ACPI_RSTYPE_MEM32:
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/*
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* 32-Bit Memory Range Resource
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* For this resource the size is static
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*/
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segment_size = 20;
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break;
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case ACPI_RSTYPE_FIXED_MEM32:
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/*
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* 32-Bit Fixed Memory Resource
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* For this resource the size is static
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*/
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segment_size = 12;
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break;
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case ACPI_RSTYPE_ADDRESS16:
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/*
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* 16-Bit Address Resource
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* The base size of this byte stream is 16. If a Resource Source
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* string is not NULL, add 1 for the Index + the length of the null
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* terminated string Resource Source + 1 for the null.
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*/
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segment_size = 16;
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if (linked_list->data.address16.resource_source.string_ptr) {
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segment_size += linked_list->data.address16.resource_source.string_length;
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segment_size++;
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}
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break;
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case ACPI_RSTYPE_ADDRESS32:
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/*
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* 32-Bit Address Resource
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* The base size of this byte stream is 26. If a Resource
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* Source string is not NULL, add 1 for the Index + the
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* length of the null terminated string Resource Source +
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* 1 for the null.
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*/
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segment_size = 26;
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if (linked_list->data.address32.resource_source.string_ptr) {
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segment_size += linked_list->data.address32.resource_source.string_length;
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segment_size++;
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}
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break;
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case ACPI_RSTYPE_ADDRESS64:
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/*
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* 64-Bit Address Resource
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* The base size of this byte stream is 46. If a resource_source
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* string is not NULL, add 1 for the Index + the length of the null
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* terminated string Resource Source + 1 for the null.
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*/
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segment_size = 46;
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if (linked_list->data.address64.resource_source.string_ptr) {
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segment_size += linked_list->data.address64.resource_source.string_length;
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segment_size++;
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}
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break;
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case ACPI_RSTYPE_EXT_IRQ:
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/*
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* Extended IRQ Resource
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* The base size of this byte stream is 9. This is for an Interrupt
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* table length of 1. For each additional interrupt, add 4.
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* If a Resource Source string is not NULL, add 1 for the
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* Index + the length of the null terminated string
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* Resource Source + 1 for the null.
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*/
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segment_size = 9 +
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(((acpi_size) linked_list->data.extended_irq.number_of_interrupts - 1) * 4);
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if (linked_list->data.extended_irq.resource_source.string_ptr) {
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segment_size += linked_list->data.extended_irq.resource_source.string_length;
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segment_size++;
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}
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break;
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default:
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/*
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* If we get here, everything is out of sync, exit with error
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*/
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return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
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} /* switch (linked_list->Id) */
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/*
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* Update the total
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*/
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byte_stream_size_needed += segment_size;
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/*
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* Point to the next object
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*/
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linked_list = ACPI_PTR_ADD (struct acpi_resource,
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linked_list, linked_list->length);
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}
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/*
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* This is the data the caller needs
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*/
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*size_needed = byte_stream_size_needed;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_list_length
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*
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* PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream
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* byte_stream_buffer_length - Size of byte_stream_buffer
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* size_needed - u32 pointer of the size buffer
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* needed to properly return the
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* parsed data
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*
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* RETURN: Status
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*
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* DESCRIPTION: Takes the resource byte stream and parses it once, calculating
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* the size buffer needed to hold the linked list that conveys
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* the resource data.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_get_list_length (
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u8 *byte_stream_buffer,
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u32 byte_stream_buffer_length,
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acpi_size *size_needed)
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{
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u32 buffer_size = 0;
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u32 bytes_parsed = 0;
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u8 number_of_interrupts = 0;
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u8 number_of_channels = 0;
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u8 resource_type;
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u32 structure_size;
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u32 bytes_consumed;
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u8 *buffer;
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u8 temp8;
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u16 temp16;
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u8 index;
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u8 additional_bytes;
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ACPI_FUNCTION_TRACE ("rs_get_list_length");
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while (bytes_parsed < byte_stream_buffer_length) {
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/*
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* The next byte in the stream is the resource type
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*/
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resource_type = acpi_rs_get_resource_type (*byte_stream_buffer);
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switch (resource_type) {
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case ACPI_RDESC_TYPE_MEMORY_24:
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/*
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* 24-Bit Memory Resource
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*/
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bytes_consumed = 12;
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structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_mem24);
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break;
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case ACPI_RDESC_TYPE_LARGE_VENDOR:
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/*
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* Vendor Defined Resource
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*/
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buffer = byte_stream_buffer;
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++buffer;
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ACPI_MOVE_16_TO_16 (&temp16, buffer);
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bytes_consumed = temp16 + 3;
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/*
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* Ensure a 32-bit boundary for the structure
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*/
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temp16 = (u16) ACPI_ROUND_UP_to_32_bITS (temp16);
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structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_vendor) +
|
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(temp16 * sizeof (u8));
|
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break;
|
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|
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|
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case ACPI_RDESC_TYPE_MEMORY_32:
|
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/*
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||||
* 32-Bit Memory Range Resource
|
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*/
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||||
bytes_consumed = 20;
|
||||
|
||||
structure_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_mem32);
|
||||
break;
|
||||
|
||||
|
||||
case ACPI_RDESC_TYPE_FIXED_MEMORY_32:
|
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/*
|
||||
* 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);
|
||||
}
|
||||
Reference in New Issue
Block a user