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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2019 Fraunhofer AISEC,
* Lukas Auer <lukas.auer@aisec.fraunhofer.de>
*/
#ifndef _ASM_RISCV_SMP_H
#define _ASM_RISCV_SMP_H
/**
* struct ipi_data - Inter-processor interrupt (IPI) data structure
*
* IPIs are used for SMP support to communicate to other harts what function to
* call. Functions are in the form
* void (*addr)(ulong hart, ulong arg0, ulong arg1).
*
* The function address and the two arguments, arg0 and arg1, are stored in the
* IPI data structure. The hart ID is inserted by the hart handling the IPI and
* calling the function.
*
* @addr: Address of function
* @arg0: First argument of function
* @arg1: Second argument of function
*/
struct ipi_data {
ulong addr;
ulong arg0;
ulong arg1;
};
/**
* handle_ipi() - interrupt handler for software interrupts
*
* The IPI interrupt handler must be called to handle software interrupts. It
* calls the function specified in the hart's IPI data structure.
*
* @hart: Hart ID of the current hart
*/
void handle_ipi(ulong hart);
/**
* smp_call_function() - Call a function on all other harts
*
* Send IPIs with the specified function call to all harts.
*
* @addr: Address of function
* @arg0: First argument of function
* @arg1: Second argument of function
* @wait: Wait for harts to acknowledge request
* @return 0 if OK, -ve on error
*/
int smp_call_function(ulong addr, ulong arg0, ulong arg1, int wait);
#endif
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