1da177e4c3
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!
592 lines
17 KiB
C
592 lines
17 KiB
C
/*******************************************************************************
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*
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* Module Name: rsirq - IRQ resource descriptors
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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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#define _COMPONENT ACPI_RESOURCES
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ACPI_MODULE_NAME ("rsirq")
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_irq_resource
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*
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* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
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* stream
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* bytes_consumed - Pointer to where the number of bytes
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* consumed the byte_stream_buffer is
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* returned
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* output_buffer - Pointer to the return data buffer
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* structure_size - Pointer to where the number of bytes
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* in the return data struct is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Take the resource byte stream and fill out the appropriate
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* structure pointed to by the output_buffer. Return the
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* number of bytes consumed from the byte stream.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_irq_resource (
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u8 *byte_stream_buffer,
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acpi_size *bytes_consumed,
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u8 **output_buffer,
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acpi_size *structure_size)
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{
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u8 *buffer = byte_stream_buffer;
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struct acpi_resource *output_struct = (void *) *output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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u8 index;
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u8 i;
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acpi_size struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_irq);
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ACPI_FUNCTION_TRACE ("rs_irq_resource");
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/*
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* The number of bytes consumed are contained in the descriptor
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* (Bits:0-1)
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*/
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temp8 = *buffer;
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*bytes_consumed = (temp8 & 0x03) + 1;
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output_struct->id = ACPI_RSTYPE_IRQ;
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/*
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* Point to the 16-bits of Bytes 1 and 2
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*/
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buffer += 1;
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ACPI_MOVE_16_TO_16 (&temp16, buffer);
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output_struct->data.irq.number_of_interrupts = 0;
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/* Decode the IRQ bits */
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for (i = 0, index = 0; index < 16; index++) {
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if ((temp16 >> index) & 0x01) {
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output_struct->data.irq.interrupts[i] = index;
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i++;
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}
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}
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/* Zero interrupts is valid */
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output_struct->data.irq.number_of_interrupts = i;
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if (i > 0) {
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/*
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* Calculate the structure size based upon the number of interrupts
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*/
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struct_size += ((acpi_size) i - 1) * 4;
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}
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/*
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* Point to Byte 3 if it is used
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*/
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if (4 == *bytes_consumed) {
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buffer += 2;
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temp8 = *buffer;
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/*
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* Check for HE, LL interrupts
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*/
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switch (temp8 & 0x09) {
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case 0x01: /* HE */
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output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE;
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output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH;
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break;
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case 0x08: /* LL */
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output_struct->data.irq.edge_level = ACPI_LEVEL_SENSITIVE;
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output_struct->data.irq.active_high_low = ACPI_ACTIVE_LOW;
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break;
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default:
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/*
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* Only _LL and _HE polarity/trigger interrupts
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* are allowed (ACPI spec, section "IRQ Format")
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* so 0x00 and 0x09 are illegal.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Invalid interrupt polarity/trigger in resource list, %X\n", temp8));
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return_ACPI_STATUS (AE_BAD_DATA);
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}
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/*
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* Check for sharable
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*/
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output_struct->data.irq.shared_exclusive = (temp8 >> 3) & 0x01;
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}
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else {
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/*
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* Assume Edge Sensitive, Active High, Non-Sharable
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* per ACPI Specification
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*/
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output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE;
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output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH;
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output_struct->data.irq.shared_exclusive = ACPI_EXCLUSIVE;
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}
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/*
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* Set the Length parameter
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*/
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output_struct->length = (u32) struct_size;
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/*
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* Return the final size of the structure
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*/
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*structure_size = struct_size;
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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_irq_stream
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*
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* PARAMETERS: linked_list - Pointer to the resource linked list
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* output_buffer - Pointer to the user's return buffer
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* bytes_consumed - Pointer to where the number of bytes
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* used in the output_buffer is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Take the linked list resource structure and fills in the
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* the appropriate bytes in a byte stream
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*
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******************************************************************************/
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acpi_status
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acpi_rs_irq_stream (
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struct acpi_resource *linked_list,
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u8 **output_buffer,
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acpi_size *bytes_consumed)
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{
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u8 *buffer = *output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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u8 index;
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u8 IRqinfo_byte_needed;
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ACPI_FUNCTION_TRACE ("rs_irq_stream");
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/*
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* The descriptor field is set based upon whether a third byte is
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* needed to contain the IRQ Information.
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*/
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if (ACPI_EDGE_SENSITIVE == linked_list->data.irq.edge_level &&
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ACPI_ACTIVE_HIGH == linked_list->data.irq.active_high_low &&
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ACPI_EXCLUSIVE == linked_list->data.irq.shared_exclusive) {
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*buffer = 0x22;
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IRqinfo_byte_needed = FALSE;
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}
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else {
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*buffer = 0x23;
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IRqinfo_byte_needed = TRUE;
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}
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buffer += 1;
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temp16 = 0;
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/*
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* Loop through all of the interrupts and set the mask bits
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*/
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for(index = 0;
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index < linked_list->data.irq.number_of_interrupts;
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index++) {
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temp8 = (u8) linked_list->data.irq.interrupts[index];
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temp16 |= 0x1 << temp8;
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}
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ACPI_MOVE_16_TO_16 (buffer, &temp16);
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buffer += 2;
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/*
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* Set the IRQ Info byte if needed.
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*/
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if (IRqinfo_byte_needed) {
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temp8 = 0;
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temp8 = (u8) ((linked_list->data.irq.shared_exclusive &
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0x01) << 4);
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if (ACPI_LEVEL_SENSITIVE == linked_list->data.irq.edge_level &&
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ACPI_ACTIVE_LOW == linked_list->data.irq.active_high_low) {
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temp8 |= 0x08;
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}
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else {
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temp8 |= 0x01;
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}
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*buffer = temp8;
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buffer += 1;
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}
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/*
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* Return the number of bytes consumed in this operation
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*/
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*bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
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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_extended_irq_resource
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*
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* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
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* stream
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* bytes_consumed - Pointer to where the number of bytes
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* consumed the byte_stream_buffer is
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* returned
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* output_buffer - Pointer to the return data buffer
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* structure_size - Pointer to where the number of bytes
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* in the return data struct is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Take the resource byte stream and fill out the appropriate
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* structure pointed to by the output_buffer. Return the
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* number of bytes consumed from the byte stream.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_extended_irq_resource (
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u8 *byte_stream_buffer,
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acpi_size *bytes_consumed,
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u8 **output_buffer,
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acpi_size *structure_size)
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{
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u8 *buffer = byte_stream_buffer;
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struct acpi_resource *output_struct = (void *) *output_buffer;
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u16 temp16 = 0;
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u8 temp8 = 0;
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u8 *temp_ptr;
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u8 index;
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acpi_size struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_ext_irq);
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ACPI_FUNCTION_TRACE ("rs_extended_irq_resource");
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/*
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* Point past the Descriptor to get the number of bytes consumed
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*/
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buffer += 1;
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ACPI_MOVE_16_TO_16 (&temp16, buffer);
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/* Validate minimum descriptor length */
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if (temp16 < 6) {
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return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
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}
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*bytes_consumed = temp16 + 3;
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output_struct->id = ACPI_RSTYPE_EXT_IRQ;
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/*
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* Point to the Byte3
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*/
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buffer += 2;
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temp8 = *buffer;
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output_struct->data.extended_irq.producer_consumer = temp8 & 0x01;
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/*
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* Check for Interrupt Mode
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*
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* The definition of an Extended IRQ changed between ACPI spec v1.0b
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* and ACPI spec 2.0 (section 6.4.3.6 in both).
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*
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* - Edge/Level are defined opposite in the table vs the headers
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*/
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output_struct->data.extended_irq.edge_level =
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(temp8 & 0x2) ? ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE;
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/*
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* Check Interrupt Polarity
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*/
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output_struct->data.extended_irq.active_high_low = (temp8 >> 2) & 0x1;
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/*
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* Check for sharable
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*/
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output_struct->data.extended_irq.shared_exclusive = (temp8 >> 3) & 0x01;
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/*
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* Point to Byte4 (IRQ Table length)
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*/
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buffer += 1;
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temp8 = *buffer;
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/* Must have at least one IRQ */
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if (temp8 < 1) {
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return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
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}
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output_struct->data.extended_irq.number_of_interrupts = temp8;
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/*
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* Add any additional structure size to properly calculate
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* the next pointer at the end of this function
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*/
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struct_size += (temp8 - 1) * 4;
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/*
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* Point to Byte5 (First IRQ Number)
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*/
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buffer += 1;
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/*
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* Cycle through every IRQ in the table
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*/
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for (index = 0; index < temp8; index++) {
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ACPI_MOVE_32_TO_32 (
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&output_struct->data.extended_irq.interrupts[index], buffer);
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/* Point to the next IRQ */
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buffer += 4;
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}
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/*
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* This will leave us pointing to the Resource Source Index
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* If it is present, then save it off and calculate the
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* pointer to where the null terminated string goes:
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* Each Interrupt takes 32-bits + the 5 bytes of the
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* stream that are default.
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*
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* Note: Some resource descriptors will have an additional null, so
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* we add 1 to the length.
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*/
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if (*bytes_consumed >
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((acpi_size) output_struct->data.extended_irq.number_of_interrupts * 4) + (5 + 1)) {
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/* Dereference the Index */
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temp8 = *buffer;
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output_struct->data.extended_irq.resource_source.index = (u32) temp8;
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/* Point to the String */
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buffer += 1;
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/*
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* Point the String pointer to the end of this structure.
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*/
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output_struct->data.extended_irq.resource_source.string_ptr =
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(char *)((char *) output_struct + struct_size);
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temp_ptr = (u8 *) output_struct->data.extended_irq.resource_source.string_ptr;
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/* Copy the string into the buffer */
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index = 0;
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while (0x00 != *buffer) {
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*temp_ptr = *buffer;
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temp_ptr += 1;
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buffer += 1;
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index += 1;
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}
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/*
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* Add the terminating null
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*/
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*temp_ptr = 0x00;
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output_struct->data.extended_irq.resource_source.string_length = index + 1;
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/*
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* In order for the struct_size to fall on a 32-bit boundary,
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* calculate the length of the string and expand the
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* struct_size to the next 32-bit boundary.
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*/
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temp8 = (u8) (index + 1);
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struct_size += ACPI_ROUND_UP_to_32_bITS (temp8);
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}
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else {
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output_struct->data.extended_irq.resource_source.index = 0x00;
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output_struct->data.extended_irq.resource_source.string_length = 0;
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output_struct->data.extended_irq.resource_source.string_ptr = NULL;
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}
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/*
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* Set the Length parameter
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*/
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output_struct->length = (u32) struct_size;
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/*
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* Return the final size of the structure
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*/
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*structure_size = struct_size;
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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_extended_irq_stream
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*
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* PARAMETERS: linked_list - Pointer to the resource linked list
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* output_buffer - Pointer to the user's return buffer
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* bytes_consumed - Pointer to where the number of bytes
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* used in the output_buffer is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Take the linked list resource structure and fills in the
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* the appropriate bytes in a byte stream
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*
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******************************************************************************/
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acpi_status
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acpi_rs_extended_irq_stream (
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struct acpi_resource *linked_list,
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u8 **output_buffer,
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acpi_size *bytes_consumed)
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{
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u8 *buffer = *output_buffer;
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u16 *length_field;
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u8 temp8 = 0;
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u8 index;
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char *temp_pointer = NULL;
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ACPI_FUNCTION_TRACE ("rs_extended_irq_stream");
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/*
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* The descriptor field is static
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*/
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*buffer = 0x89;
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buffer += 1;
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/*
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* Set a pointer to the Length field - to be filled in later
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*/
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length_field = ACPI_CAST_PTR (u16, buffer);
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buffer += 2;
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/*
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* Set the Interrupt vector flags
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*/
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temp8 = (u8)(linked_list->data.extended_irq.producer_consumer & 0x01);
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temp8 |= ((linked_list->data.extended_irq.shared_exclusive & 0x01) << 3);
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/*
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* Set the Interrupt Mode
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*
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* The definition of an Extended IRQ changed between ACPI spec v1.0b
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* and ACPI spec 2.0 (section 6.4.3.6 in both). This code does not
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* implement the more restrictive definition of 1.0b
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*
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* - Edge/Level are defined opposite in the table vs the headers
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*/
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if (ACPI_EDGE_SENSITIVE == linked_list->data.extended_irq.edge_level) {
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temp8 |= 0x2;
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}
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/*
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* Set the Interrupt Polarity
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*/
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temp8 |= ((linked_list->data.extended_irq.active_high_low & 0x1) << 2);
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*buffer = temp8;
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buffer += 1;
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/*
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* Set the Interrupt table length
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*/
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temp8 = (u8) linked_list->data.extended_irq.number_of_interrupts;
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*buffer = temp8;
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buffer += 1;
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for (index = 0; index < linked_list->data.extended_irq.number_of_interrupts;
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index++) {
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ACPI_MOVE_32_TO_32 (buffer,
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&linked_list->data.extended_irq.interrupts[index]);
|
|
buffer += 4;
|
|
}
|
|
|
|
/*
|
|
* Resource Source Index and Resource Source are optional
|
|
*/
|
|
if (0 != linked_list->data.extended_irq.resource_source.string_length) {
|
|
*buffer = (u8) linked_list->data.extended_irq.resource_source.index;
|
|
buffer += 1;
|
|
|
|
temp_pointer = (char *) buffer;
|
|
|
|
/*
|
|
* Copy the string
|
|
*/
|
|
ACPI_STRCPY (temp_pointer,
|
|
linked_list->data.extended_irq.resource_source.string_ptr);
|
|
|
|
/*
|
|
* Buffer needs to be set to the length of the sting + one for the
|
|
* terminating null
|
|
*/
|
|
buffer += (acpi_size)(ACPI_STRLEN (linked_list->data.extended_irq.resource_source.string_ptr) + 1);
|
|
}
|
|
|
|
/*
|
|
* Return the number of bytes consumed in this operation
|
|
*/
|
|
*bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
|
|
|
|
/*
|
|
* Set the length field to the number of bytes consumed
|
|
* minus the header size (3 bytes)
|
|
*/
|
|
*length_field = (u16) (*bytes_consumed - 3);
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|