1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2019 Fraunhofer AISEC,
4  * Lukas Auer <lukas.auer@aisec.fraunhofer.de>
5  */
6 
7 #include <common.h>
8 #include <asm/encoding.h>
9 #include <asm/sbi.h>
10 
riscv_send_ipi(int hart)11 int riscv_send_ipi(int hart)
12 {
13 	ulong mask;
14 
15 	mask = 1UL << hart;
16 	sbi_send_ipi(&mask);
17 
18 	return 0;
19 }
20 
riscv_clear_ipi(int hart)21 int riscv_clear_ipi(int hart)
22 {
23 	csr_clear(CSR_SIP, SIP_SSIP);
24 
25 	return 0;
26 }
27 
riscv_get_ipi(int hart,int * pending)28 int riscv_get_ipi(int hart, int *pending)
29 {
30 	/*
31 	 * The SBI does not support reading the IPI status. We always return 0
32 	 * to indicate that no IPI is pending.
33 	 */
34 	*pending = 0;
35 
36 	return 0;
37 }
38