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/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* 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 Hyra 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_IPI_H_
#define _MACHINE_IPI_H_
#include <sys/types.h>
#include <machine/cpu.h>
#include <machine/lapic.h>
/* Fixed IPI IDs */
#define IPI_HALT 0
#define IPI_TLB 1
/*
* Represents an interprocessor interrupt
* handler.
*
* @cookie: Used to verifying an instance
* @id: IPI ID (identifies the IPI)
* @mask: If set, IPIs are ignored
* @handler: Handler routine
*/
struct cpu_ipi {
uint16_t cookie;
uint8_t id;
int(*handler)(struct cpu_ipi *ipi);
};
/*
* Represents an interrupt vector for a
* specific IPI
*
* @ipi: IPIs associated with this vector
* @cookie: Used to verify an instance
* @nipi: Number of IPIs associated
* @vec: System interrupt vector number
*/
struct ipi_vector {
struct cpu_ipi ipi[IPI_PER_VEC];
uint16_t cookie;
uint8_t nipi;
uint8_t vec;
};
int md_ipi_alloc(struct cpu_ipi **res);
int md_ipi_send(struct cpu_info *ci);
void md_ipi_init(void);
/*
* Get the vector an IPI belongs to
*
* @ipi: IPI to check
*/
__always_inline static inline uint8_t
ipi_vector(uint8_t ipi)
{
return ipi / N_IPIVEC;
}
/*
* Get the handler index an IPI belongs
* to
*
* @ipi: IPI to check
*/
__always_inline static inline uint8_t
ipi_index(uint8_t ipi)
{
return ipi % (sizeof(ipi_pend_t) * 8);
}
__always_inline static inline int
cpu_ipi_send(struct cpu_info *ci, uint8_t ipi)
{
uint8_t vec = ipi_vector(ipi);
uint8_t idx = ipi_index(ipi);
ci->ipi_pending[vec] |= BIT(idx);
return md_ipi_send(ci);
}
#endif /* !_MACHINE_IPI_H_ */
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