55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/* 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
|