553 lines
16 KiB
C
553 lines
16 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(u8 * byte_stream_buffer,
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acpi_size * bytes_consumed,
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u8 ** output_buffer, 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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/* Point to the 16-bits of Bytes 1 and 2 */
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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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/* Calculate the structure size based upon the number of interrupts */
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struct_size += ((acpi_size) i - 1) * 4;
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}
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/* Point to Byte 3 if it is used */
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if (4 == *bytes_consumed) {
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buffer += 2;
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temp8 = *buffer;
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/* Check for HE, LL interrupts */
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switch (temp8 & 0x09) {
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case 0x01: /* HE */
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output_struct->data.irq.edge_level =
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ACPI_EDGE_SENSITIVE;
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output_struct->data.irq.active_high_low =
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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 =
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ACPI_LEVEL_SENSITIVE;
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output_struct->data.irq.active_high_low =
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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",
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temp8));
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return_ACPI_STATUS(AE_BAD_DATA);
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}
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/* Check for sharable */
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output_struct->data.irq.shared_exclusive = (temp8 >> 3) & 0x01;
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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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/* Set the Length parameter */
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output_struct->length = (u32) struct_size;
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/* Return the final size of the structure */
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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(struct acpi_resource *linked_list,
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u8 ** output_buffer, 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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} 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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/* Loop through all of the interrupts and set the mask bits */
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for (index = 0;
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index < linked_list->data.irq.number_of_interrupts; 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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/* Set the IRQ Info byte if needed. */
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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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} 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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/* Return the number of bytes consumed in this operation */
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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(u8 * byte_stream_buffer,
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acpi_size * bytes_consumed,
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u8 ** output_buffer, 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 =
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ACPI_SIZEOF_RESOURCE(struct acpi_resource_ext_irq);
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ACPI_FUNCTION_TRACE("rs_extended_irq_resource");
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/* Get the Descriptor Length field */
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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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/* Point to the Byte3 */
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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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/* Check Interrupt Polarity */
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output_struct->data.extended_irq.active_high_low = (temp8 >> 2) & 0x1;
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/* Check for sharable */
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output_struct->data.extended_irq.shared_exclusive = (temp8 >> 3) & 0x01;
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/* Point to Byte4 (IRQ Table length) */
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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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/* Point to Byte5 (First IRQ Number) */
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buffer += 1;
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/* Cycle through every IRQ in the table */
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for (index = 0; index < temp8; index++) {
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ACPI_MOVE_32_TO_32(&output_struct->data.extended_irq.
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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 *
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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 =
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(u32) temp8;
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/* Point to the String */
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buffer += 1;
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/* Point the String pointer to the end of this structure. */
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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 *)
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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 (*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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/* Add the terminating null */
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*temp_ptr = 0;
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output_struct->data.extended_irq.resource_source.string_length =
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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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} else {
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output_struct->data.extended_irq.resource_source.index = 0;
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output_struct->data.extended_irq.resource_source.string_length =
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0;
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output_struct->data.extended_irq.resource_source.string_ptr =
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NULL;
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}
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/* Set the Length parameter */
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output_struct->length = (u32) struct_size;
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/* Return the final size of the structure */
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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(struct acpi_resource *linked_list,
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u8 ** output_buffer, 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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ACPI_FUNCTION_TRACE("rs_extended_irq_stream");
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/* Set the Descriptor Type field */
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*buffer = ACPI_RDESC_TYPE_EXTENDED_XRUPT;
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buffer += 1;
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/* Save a pointer to the Length field - to be filled in later */
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length_field = ACPI_CAST_PTR(u16, buffer);
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buffer += 2;
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/* Set the Interrupt vector flags */
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temp8 = (u8) (linked_list->data.extended_irq.producer_consumer & 0x01);
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temp8 |=
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((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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/* Set the Interrupt Polarity */
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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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/* Set the Interrupt table length */
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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;
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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.
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interrupts[index]);
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buffer += 4;
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}
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/* Resource Source Index and Resource Source are optional */
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if (0 != linked_list->data.extended_irq.resource_source.string_length) {
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*buffer =
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(u8) linked_list->data.extended_irq.resource_source.index;
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buffer += 1;
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/* Copy the string */
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ACPI_STRCPY((char *)buffer,
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linked_list->data.extended_irq.resource_source.
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string_ptr);
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/*
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* Buffer needs to be set to the length of the string + one for the
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* terminating null
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*/
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buffer +=
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(acpi_size) (ACPI_STRLEN
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(linked_list->data.extended_irq.
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resource_source.string_ptr) + 1);
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}
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/* Return the number of bytes consumed in this operation */
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*bytes_consumed = ACPI_PTR_DIFF(buffer, *output_buffer);
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/*
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* Set the length field to the number of bytes consumed
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* minus the header size (3 bytes)
|
|
*/
|
|
*length_field = (u16) (*bytes_consumed - 3);
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|