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