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|
/*******************************************************************************
*
* Module Name: rslist - Linked list utilities
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include <acpi/acresrc.h>
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME("rslist")
/* Dispatch table for convert-to-stream functions */
typedef
acpi_status(*ACPI_STREAM_HANDLER) (struct acpi_resource * resource,
u8 ** output_buffer,
acpi_size * bytes_consumed);
static ACPI_STREAM_HANDLER acpi_gbl_stream_dispatch[] = {
acpi_rs_irq_stream, /* ACPI_RSTYPE_IRQ */
acpi_rs_dma_stream, /* ACPI_RSTYPE_DMA */
acpi_rs_start_depend_fns_stream, /* ACPI_RSTYPE_START_DPF */
acpi_rs_end_depend_fns_stream, /* ACPI_RSTYPE_END_DPF */
acpi_rs_io_stream, /* ACPI_RSTYPE_IO */
acpi_rs_fixed_io_stream, /* ACPI_RSTYPE_FIXED_IO */
acpi_rs_vendor_stream, /* ACPI_RSTYPE_VENDOR */
acpi_rs_end_tag_stream, /* ACPI_RSTYPE_END_TAG */
acpi_rs_memory24_stream, /* ACPI_RSTYPE_MEM24 */
acpi_rs_memory32_range_stream, /* ACPI_RSTYPE_MEM32 */
acpi_rs_fixed_memory32_stream, /* ACPI_RSTYPE_FIXED_MEM32 */
acpi_rs_address16_stream, /* ACPI_RSTYPE_ADDRESS16 */
acpi_rs_address32_stream, /* ACPI_RSTYPE_ADDRESS32 */
acpi_rs_address64_stream, /* ACPI_RSTYPE_ADDRESS64 */
acpi_rs_extended_irq_stream, /* ACPI_RSTYPE_EXT_IRQ */
acpi_rs_generic_register_stream /* ACPI_RSTYPE_GENERIC_REG */
};
/* Dispatch tables for convert-to-resource functions */
typedef
acpi_status(*ACPI_RESOURCE_HANDLER) (u8 * byte_stream_buffer,
acpi_size * bytes_consumed,
u8 ** output_buffer,
acpi_size * structure_size);
static ACPI_RESOURCE_HANDLER acpi_gbl_sm_resource_dispatch[] = {
NULL, /* 0x00, Reserved */
NULL, /* 0x01, Reserved */
NULL, /* 0x02, Reserved */
NULL, /* 0x03, Reserved */
acpi_rs_irq_resource, /* ACPI_RDESC_TYPE_IRQ_FORMAT */
acpi_rs_dma_resource, /* ACPI_RDESC_TYPE_DMA_FORMAT */
acpi_rs_start_depend_fns_resource, /* ACPI_RDESC_TYPE_START_DEPENDENT */
acpi_rs_end_depend_fns_resource, /* ACPI_RDESC_TYPE_END_DEPENDENT */
acpi_rs_io_resource, /* ACPI_RDESC_TYPE_IO_PORT */
acpi_rs_fixed_io_resource, /* ACPI_RDESC_TYPE_FIXED_IO_PORT */
NULL, /* 0x0A, Reserved */
NULL, /* 0x0B, Reserved */
NULL, /* 0x0C, Reserved */
NULL, /* 0x0D, Reserved */
acpi_rs_vendor_resource, /* ACPI_RDESC_TYPE_SMALL_VENDOR */
acpi_rs_end_tag_resource /* ACPI_RDESC_TYPE_END_TAG */
};
static ACPI_RESOURCE_HANDLER acpi_gbl_lg_resource_dispatch[] = {
NULL, /* 0x00, Reserved */
acpi_rs_memory24_resource, /* ACPI_RDESC_TYPE_MEMORY_24 */
acpi_rs_generic_register_resource, /* ACPI_RDESC_TYPE_GENERIC_REGISTER */
NULL, /* 0x03, Reserved */
acpi_rs_vendor_resource, /* ACPI_RDESC_TYPE_LARGE_VENDOR */
acpi_rs_memory32_range_resource, /* ACPI_RDESC_TYPE_MEMORY_32 */
acpi_rs_fixed_memory32_resource, /* ACPI_RDESC_TYPE_FIXED_MEMORY_32 */
acpi_rs_address32_resource, /* ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE */
acpi_rs_address16_resource, /* ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE */
acpi_rs_extended_irq_resource, /* ACPI_RDESC_TYPE_EXTENDED_XRUPT */
acpi_rs_address64_resource, /* ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE */
acpi_rs_address64_resource /* ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE */
};
/* Local prototypes */
static ACPI_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type);
/*******************************************************************************
*
* FUNCTION: acpi_rs_get_resource_type
*
* PARAMETERS: resource_type - Byte 0 of a resource descriptor
*
* RETURN: The Resource Type with no extraneous bits (except the large/
* small bit -- left alone)
*
* DESCRIPTION: Extract the Resource Type/Name from the first byte of
* a resource descriptor.
*
******************************************************************************/
u8 acpi_rs_get_resource_type(u8 resource_type)
{
ACPI_FUNCTION_ENTRY();
/* Determine if this is a small or large resource */
if (resource_type & ACPI_RDESC_TYPE_LARGE) {
/* Large Resource Type -- bits 6:0 contain the name */
return (resource_type);
} else {
/* Small Resource Type -- bits 6:3 contain the name */
return ((u8) (resource_type & ACPI_RDESC_SMALL_MASK));
}
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_get_resource_handler
*
* PARAMETERS: resource_type - Byte 0 of a resource descriptor
*
* RETURN: Pointer to the resource conversion handler
*
* DESCRIPTION: Extract the Resource Type/Name from the first byte of
* a resource descriptor.
*
******************************************************************************/
static ACPI_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type)
{
ACPI_FUNCTION_ENTRY();
/* Determine if this is a small or large resource */
if (resource_type & ACPI_RDESC_TYPE_LARGE) {
/* Large Resource Type -- bits 6:0 contain the name */
if (resource_type > ACPI_RDESC_LARGE_MAX) {
return (NULL);
}
return (acpi_gbl_lg_resource_dispatch[(resource_type &
ACPI_RDESC_LARGE_MASK)]);
} else {
/* Small Resource Type -- bits 6:3 contain the name */
return (acpi_gbl_sm_resource_dispatch[((resource_type &
ACPI_RDESC_SMALL_MASK)
>> 3)]);
}
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_byte_stream_to_list
*
* PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream
* byte_stream_buffer_length - Length of byte_stream_buffer
* output_buffer - Pointer to the buffer that will
* contain the output structures
*
* RETURN: Status
*
* DESCRIPTION: Takes the resource byte stream and parses it, creating a
* linked list of resources in the caller's output buffer
*
******************************************************************************/
acpi_status
acpi_rs_byte_stream_to_list(u8 * byte_stream_buffer,
u32 byte_stream_buffer_length, u8 * output_buffer)
{
u8 *buffer = output_buffer;
acpi_status status;
acpi_size bytes_parsed = 0;
acpi_size bytes_consumed = 0;
acpi_size structure_size = 0;
struct acpi_resource *resource;
ACPI_RESOURCE_HANDLER handler;
ACPI_FUNCTION_TRACE("rs_byte_stream_to_list");
/* Loop until end-of-buffer or an end_tag is found */
while (bytes_parsed < byte_stream_buffer_length) {
/* Get the handler associated with this Descriptor Type */
handler = acpi_rs_get_resource_handler(*byte_stream_buffer);
if (handler) {
/* Convert a byte stream resource to local resource struct */
status = handler(byte_stream_buffer, &bytes_consumed,
&buffer, &structure_size);
} else {
/* Invalid resource type */
status = AE_AML_INVALID_RESOURCE_TYPE;
}
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Set the aligned length of the new resource descriptor */
resource = ACPI_CAST_PTR(struct acpi_resource, buffer);
resource->length =
(u32) ACPI_ALIGN_RESOURCE_SIZE(resource->length);
/* Normal exit on completion of an end_tag resource descriptor */
if (acpi_rs_get_resource_type(*byte_stream_buffer) ==
ACPI_RDESC_TYPE_END_TAG) {
return_ACPI_STATUS(AE_OK);
}
/* Update counter and point to the next input resource */
bytes_parsed += bytes_consumed;
byte_stream_buffer += bytes_consumed;
/* Point to the next structure in the output buffer */
buffer += ACPI_ALIGN_RESOURCE_SIZE(structure_size);
}
/* Completed buffer, but did not find an end_tag resource descriptor */
return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
}
/*******************************************************************************
*
* FUNCTION: acpi_rs_list_to_byte_stream
*
* PARAMETERS: Resource - Pointer to the resource linked list
* byte_steam_size_needed - Calculated size of the byte stream
* needed from calling
* acpi_rs_get_byte_stream_length()
* The size of the output_buffer is
* guaranteed to be >=
* byte_stream_size_needed
* output_buffer - Pointer to the buffer that will
* contain the byte stream
*
* RETURN: Status
*
* DESCRIPTION: Takes the resource linked list and parses it, creating a
* byte stream of resources in the caller's output buffer
*
******************************************************************************/
acpi_status
acpi_rs_list_to_byte_stream(struct acpi_resource *resource,
acpi_size byte_stream_size_needed,
u8 * output_buffer)
{
u8 *buffer = output_buffer;
acpi_size bytes_consumed = 0;
acpi_status status;
ACPI_FUNCTION_TRACE("rs_list_to_byte_stream");
/* Convert each resource descriptor in the list */
while (1) {
/* Validate Type before dispatch */
if (resource->type > ACPI_RSTYPE_MAX) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Invalid descriptor type (%X) in resource list\n",
resource->type));
return_ACPI_STATUS(AE_BAD_DATA);
}
/* Perform the conversion, per resource type */
status = acpi_gbl_stream_dispatch[resource->type] (resource,
&buffer,
&bytes_consumed);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Check for end-of-list */
if (resource->type == ACPI_RSTYPE_END_TAG) {
/* An End Tag indicates the end of the Resource Template */
return_ACPI_STATUS(AE_OK);
}
/* Set the Buffer to point to the next (output) resource descriptor */
buffer += bytes_consumed;
/* Point to the next input resource object */
resource = ACPI_PTR_ADD(struct acpi_resource,
resource, resource->length);
}
}
|
