mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 02:38:56 +00:00
f152febb2a
The supervisor binary interface (SBI) provides the necessary functions to implement the platform IPI functions riscv_send_ipi() and riscv_clear_ipi(). Use it to implement them. This adds support for inter-processor interrupts (IPIs) on RISC-V CPUs running in supervisor mode. Support for machine mode is already available for CPUs that include the SiFive CLINT. Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Atish Patra <atish.patra@wdc.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
25 lines
341 B
C
25 lines
341 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2019 Fraunhofer AISEC,
|
|
* Lukas Auer <lukas.auer@aisec.fraunhofer.de>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/sbi.h>
|
|
|
|
int riscv_send_ipi(int hart)
|
|
{
|
|
ulong mask;
|
|
|
|
mask = 1UL << hart;
|
|
sbi_send_ipi(&mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int riscv_clear_ipi(int hart)
|
|
{
|
|
sbi_clear_ipi();
|
|
|
|
return 0;
|
|
}
|