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/*
* Copyright (c) 2025 Ian Marco Moffett and L5 engineers
* 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.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 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 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE.
*/
#ifndef _MACHINE_ACPI_H_
#define _MACHINE_ACPI_H_
#include <sys/types.h>
#include <acpi/tables.h>
/*
* Perform an ACPI checksum on a specific ACPI
* header
*
* @hdr: Header to be verified
*
* Returns zero on success, otherwise a less than zero
* value if the checksum is invalid
*/
int acpi_checksum(struct acpi_header *hdr);
/*
* Get the number of entries within the root system
* descriptor table
*/
size_t acpi_get_root_sdt_len(void);
/*
* Get the root system descriptor table base
* address.
*/
void *acpi_get_root_sdt(void);
/*
* Query for an ACPI table
*
* @query: Signature of table to query
*
* Returns virtual base address of table on success,
* otherwise NULL on failure.
*/
void *acpi_query(const char *query);
/*
* Initialize the ACPI subsystem
*
* Returns zero on success, otherwise a less than zero
* value on failure.
*/
int acpi_early_init(void);
/*
* Read a MADT entry
*
* @type: Type that we should scan for
* @cb: Callback (returns 0 if entry is found)
* @arg: Optional argument
*
* Returns the callback return value, on success,
* otherwise a less than zero value on failure.
*/
int acpi_read_madt(
uint32_t type, int(*cb)(struct apic_header *, size_t arg),
size_t arg
);
#endif /* !_MACHINE_ACPI_H_ */
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