50eca3eb89
Completed a major overhaul of the Resource Manager code - specifically, optimizations in the area of the AML/internal resource conversion code. The code has been optimized to simplify and eliminate duplicated code, CPU stack use has been decreased by optimizing function parameters and local variables, and naming conventions across the manager have been standardized for clarity and ease of maintenance (this includes function, parameter, variable, and struct/typedef names.) All Resource Manager dispatch and information tables have been moved to a single location for clarity and ease of maintenance. One new file was created, named "rsinfo.c". The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to guarantee that the argument is not evaluated twice, making them less prone to macro side-effects. However, since there exists the possibility of additional stack use if a particular compiler cannot optimize them (such as in the debug generation case), the original macros are optionally available. Note that some invocations of the return_VALUE macro may now cause size mismatch warnings; the return_UINT8 and return_UINT32 macros are provided to eliminate these. (From Randy Dunlap) Implemented a new mechanism to enable debug tracing for individual control methods. A new external interface, acpi_debug_trace(), is provided to enable this mechanism. The intent is to allow the host OS to easily enable and disable tracing for problematic control methods. This interface can be easily exposed to a user or debugger interface if desired. See the file psxface.c for details. acpi_ut_callocate() will now return a valid pointer if a length of zero is specified - a length of one is used and a warning is issued. This matches the behavior of acpi_ut_allocate(). Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
374 lines
12 KiB
C
374 lines
12 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_get_irq
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*
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* PARAMETERS: Aml - Pointer to the AML resource descriptor
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* aml_resource_length - Length of the resource from the AML header
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* Resource - Where the internal resource is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
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* internal resource descriptor, simplifying bitflags and handling
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* alignment and endian issues if necessary.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_get_irq(union aml_resource *aml,
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u16 aml_resource_length, struct acpi_resource *resource)
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{
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u16 temp16 = 0;
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u32 interrupt_count = 0;
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u32 i;
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u32 resource_length;
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ACPI_FUNCTION_TRACE("rs_get_irq");
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/* Get the IRQ mask (bytes 1:2) */
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ACPI_MOVE_16_TO_16(&temp16, &aml->irq.irq_mask);
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/* Decode the IRQ bits (up to 16 possible) */
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for (i = 0; i < 16; i++) {
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if ((temp16 >> i) & 0x01) {
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resource->data.irq.interrupts[interrupt_count] = i;
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interrupt_count++;
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}
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}
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/* Zero interrupts is valid */
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resource_length = 0;
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resource->data.irq.interrupt_count = interrupt_count;
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if (interrupt_count > 0) {
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/* Calculate the structure size based upon the number of interrupts */
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resource_length = (u32) (interrupt_count - 1) * 4;
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}
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/* Get Flags (Byte 3) if it is used */
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if (aml_resource_length == 3) {
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/* Check for HE, LL interrupts */
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switch (aml->irq.flags & 0x09) {
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case 0x01: /* HE */
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resource->data.irq.triggering = ACPI_EDGE_SENSITIVE;
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resource->data.irq.polarity = ACPI_ACTIVE_HIGH;
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break;
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case 0x08: /* LL */
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resource->data.irq.triggering = ACPI_LEVEL_SENSITIVE;
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resource->data.irq.polarity = 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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aml->irq.flags));
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return_ACPI_STATUS(AE_BAD_DATA);
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}
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/* Get Sharing flag */
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resource->data.irq.sharable = (aml->irq.flags >> 3) & 0x01;
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} else {
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/*
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* Default configuration: assume Edge Sensitive, Active High,
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* Non-Sharable as per the ACPI Specification
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*/
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resource->data.irq.triggering = ACPI_EDGE_SENSITIVE;
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resource->data.irq.polarity = ACPI_ACTIVE_HIGH;
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resource->data.irq.sharable = ACPI_EXCLUSIVE;
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}
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/* Complete the resource header */
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resource->type = ACPI_RESOURCE_TYPE_IRQ;
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resource->length =
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resource_length + ACPI_SIZEOF_RESOURCE(struct acpi_resource_irq);
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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_set_irq
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*
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* PARAMETERS: Resource - Pointer to the resource descriptor
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* Aml - Where the AML descriptor is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an internal resource descriptor to the corresponding
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* external AML resource descriptor.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_set_irq(struct acpi_resource *resource, union aml_resource *aml)
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{
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acpi_size descriptor_length;
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u16 irq_mask;
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u8 i;
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ACPI_FUNCTION_TRACE("rs_set_irq");
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/* Convert interrupt list to 16-bit IRQ bitmask */
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irq_mask = 0;
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for (i = 0; i < resource->data.irq.interrupt_count; i++) {
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irq_mask |= (1 << resource->data.irq.interrupts[i]);
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}
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/* Set the interrupt mask */
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ACPI_MOVE_16_TO_16(&aml->irq.irq_mask, &irq_mask);
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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 ((resource->data.irq.triggering == ACPI_EDGE_SENSITIVE) &&
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(resource->data.irq.polarity == ACPI_ACTIVE_HIGH) &&
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(resource->data.irq.sharable == ACPI_EXCLUSIVE)) {
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/* irq_no_flags() descriptor can be used */
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descriptor_length = sizeof(struct aml_resource_irq_noflags);
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} else {
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/* Irq() descriptor must be used */
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descriptor_length = sizeof(struct aml_resource_irq);
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/* Set the IRQ Info byte */
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aml->irq.flags = (u8)
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((resource->data.irq.sharable & 0x01) << 4);
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if (ACPI_LEVEL_SENSITIVE == resource->data.irq.triggering &&
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ACPI_ACTIVE_LOW == resource->data.irq.polarity) {
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aml->irq.flags |= 0x08;
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} else {
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aml->irq.flags |= 0x01;
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}
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}
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/* Complete the AML descriptor header */
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acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_IRQ, descriptor_length,
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aml);
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_get_ext_irq
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*
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* PARAMETERS: Aml - Pointer to the AML resource descriptor
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* aml_resource_length - Length of the resource from the AML header
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* Resource - Where the internal resource is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
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* internal resource descriptor, simplifying bitflags and handling
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* alignment and endian issues if necessary.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_get_ext_irq(union aml_resource *aml,
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u16 aml_resource_length, struct acpi_resource *resource)
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{
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char *out_resource_string;
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u8 temp8;
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ACPI_FUNCTION_TRACE("rs_get_ext_irq");
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/* Get the flag bits */
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temp8 = aml->extended_irq.flags;
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resource->data.extended_irq.producer_consumer = temp8 & 0x01;
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resource->data.extended_irq.polarity = (temp8 >> 2) & 0x01;
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resource->data.extended_irq.sharable = (temp8 >> 3) & 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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resource->data.extended_irq.triggering =
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(temp8 & 0x2) ? ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE;
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/* Get the IRQ Table length (Byte4) */
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temp8 = aml->extended_irq.table_length;
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resource->data.extended_irq.interrupt_count = temp8;
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if (temp8 < 1) {
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/* Must have at least one IRQ */
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return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
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}
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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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resource->length = (temp8 - 1) * 4;
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out_resource_string = ACPI_CAST_PTR(char,
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(&resource->data.extended_irq.
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interrupts[0] + temp8));
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/* Get every IRQ in the table, each is 32 bits */
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acpi_rs_move_data(resource->data.extended_irq.interrupts,
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aml->extended_irq.interrupt_number,
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(u16) temp8, ACPI_MOVE_TYPE_32_TO_32);
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/* Get the optional resource_source (index and string) */
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resource->length +=
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acpi_rs_get_resource_source(aml_resource_length,
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(acpi_size) resource->length +
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sizeof(struct
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aml_resource_extended_irq),
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&resource->data.extended_irq.
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resource_source, aml,
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out_resource_string);
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/* Complete the resource header */
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resource->type = ACPI_RESOURCE_TYPE_EXTENDED_IRQ;
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resource->length +=
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ACPI_SIZEOF_RESOURCE(struct acpi_resource_extended_irq);
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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_set_ext_irq
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*
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* PARAMETERS: Resource - Pointer to the resource descriptor
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* Aml - Where the AML descriptor is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an internal resource descriptor to the corresponding
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* external AML resource descriptor.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_set_ext_irq(struct acpi_resource *resource, union aml_resource *aml)
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{
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acpi_size descriptor_length;
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ACPI_FUNCTION_TRACE("rs_set_ext_irq");
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/* Set the Interrupt vector flags */
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aml->extended_irq.flags = (u8)
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((resource->data.extended_irq.producer_consumer & 0x01) |
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((resource->data.extended_irq.sharable & 0x01) << 3) |
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((resource->data.extended_irq.polarity & 0x1) << 2));
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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 (resource->data.extended_irq.triggering == ACPI_EDGE_SENSITIVE) {
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aml->extended_irq.flags |= 0x02;
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}
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/* Set the Interrupt table length */
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aml->extended_irq.table_length = (u8)
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resource->data.extended_irq.interrupt_count;
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descriptor_length = (sizeof(struct aml_resource_extended_irq) - 4) +
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((acpi_size) resource->data.extended_irq.interrupt_count *
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sizeof(u32));
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/* Set each interrupt value */
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acpi_rs_move_data(aml->extended_irq.interrupt_number,
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resource->data.extended_irq.interrupts,
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(u16) resource->data.extended_irq.interrupt_count,
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ACPI_MOVE_TYPE_32_TO_32);
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/* Resource Source Index and Resource Source are optional */
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descriptor_length = acpi_rs_set_resource_source(aml, descriptor_length,
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&resource->data.
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extended_irq.
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resource_source);
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/* Complete the AML descriptor header */
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acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_EXTENDED_IRQ,
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descriptor_length, aml);
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return_ACPI_STATUS(AE_OK);
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}
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