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https://github.com/brain-hackers/u-boot-brain
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f295e00c61
There is no need for S-mode U-Boot to call sbi_clear_ipi() as it can be cleared directly from S-mode. This saves some cycles. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas@auer.io>
38 lines
575 B
C
38 lines
575 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/encoding.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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csr_clear(CSR_SIP, SIP_SSIP);
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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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