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8b3e97badf
Add the function riscv_get_ipi() for reading the pending status of IPIs. The supported controllers are Andes' Platform Level Interrupt Controller (PLIC), the Supervisor Binary Interface (SBI), and SiFive's Core Local Interruptor (CLINT). Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Rick Chen <rick@andestech.com>
36 lines
536 B
C
36 lines
536 B
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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#include <common.h>
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#include <asm/sbi.h>
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int riscv_send_ipi(int hart)
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{
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ulong mask;
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mask = 1UL << hart;
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sbi_send_ipi(&mask);
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return 0;
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}
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int riscv_clear_ipi(int hart)
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{
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sbi_clear_ipi();
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return 0;
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}
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int riscv_get_ipi(int hart, int *pending)
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{
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/*
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* The SBI does not support reading the IPI status. We always return 0
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* to indicate that no IPI is pending.
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*/
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*pending = 0;
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return 0;
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}
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