forked from luck/tmp_suning_uos_patched
bda663d36b
Fixed a problem within the Resource Manager where support for the Generic Register descriptor was not fully implemented. This descriptor is now fully recognized, parsed, disassembled, and displayed. Restructured the Resource Manager code to utilize table-driven dispatch and lookup, eliminating many of the large switch() statements. This reduces overall subsystem code size and code complexity. Affects the resource parsing and construction, disassembly, and debug dump output. Cleaned up and restructured the debug dump output for all resource descriptors. Improved readability of the output and reduced code size. Fixed a problem where changes to internal data structures caused the optional ACPI_MUTEX_DEBUG code to fail compilation if specified. Signed-off-by: Robert Moore <Robert.Moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
552 lines
16 KiB
C
552 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->type = 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: Resource - 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 *resource,
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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 == resource->data.irq.edge_level &&
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ACPI_ACTIVE_HIGH == resource->data.irq.active_high_low &&
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ACPI_EXCLUSIVE == resource->data.irq.shared_exclusive) {
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*buffer = ACPI_RDESC_TYPE_IRQ_FORMAT | 0x02;
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IRqinfo_byte_needed = FALSE;
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} else {
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*buffer = ACPI_RDESC_TYPE_IRQ_FORMAT | 0x03;
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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 < resource->data.irq.number_of_interrupts; index++) {
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temp8 = (u8) resource->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) ((resource->data.irq.shared_exclusive &
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0x01) << 4);
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if (ACPI_LEVEL_SENSITIVE == resource->data.irq.edge_level &&
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ACPI_ACTIVE_LOW == resource->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->type = 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: Resource - 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 *resource,
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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) (resource->data.extended_irq.producer_consumer & 0x01);
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temp8 |= ((resource->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 == resource->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 |= ((resource->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) resource->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 < resource->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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&resource->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 != resource->data.extended_irq.resource_source.string_length) {
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*buffer =
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(u8) resource->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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resource->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 +=
|
|
(acpi_size) (ACPI_STRLEN
|
|
(resource->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);
|
|
}
|