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https://github.com/riscv-software-src/opensbi.git
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f700216cb5
Currently, there is no provision for tracking multiple IPIs sent to a single hart at the same time by different harts. Use a fifo manage the outstanding requests. While dequeueing, read all the entries once, because we have only 1 bit to track the type of IPI. Once the queue is full, busy wait until the there is space available in queue. This is not the most elegant approach. It should be changed in favor of a wakeup event once available in opensbi. Signed-off-by: Atish Patra <atish.patra@wdc.com>
53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2019 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*/
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#ifndef __SBI_IPI_H__
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#define __SBI_IPI_H__
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#include <sbi/sbi_types.h>
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#define SBI_IPI_EVENT_SOFT 0x1
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#define SBI_IPI_EVENT_FENCE_I 0x2
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#define SBI_IPI_EVENT_SFENCE_VMA 0x4
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#define SBI_IPI_EVENT_SFENCE_VMA_ASID 0x8
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#define SBI_IPI_EVENT_HALT 0x10
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#define SBI_TLB_FIFO_NUM_ENTRIES 4
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enum sbi_tlb_info_types {
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SBI_TLB_FLUSH_VMA,
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SBI_TLB_FLUSH_VMA_ASID,
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SBI_TLB_FLUSH_VMA_VMID
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};
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struct sbi_scratch;
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struct sbi_ipi_data {
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unsigned long ipi_type;
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};
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struct sbi_tlb_info {
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unsigned long start;
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unsigned long size;
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unsigned long asid;
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unsigned long type;
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};
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#define SBI_TLB_INFO_SIZE sizeof(struct sbi_tlb_info)
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int sbi_ipi_send_many(struct sbi_scratch *scratch,
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ulong *pmask, u32 event, void *data);
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void sbi_ipi_clear_smode(struct sbi_scratch *scratch);
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void sbi_ipi_process(struct sbi_scratch *scratch);
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int sbi_ipi_init(struct sbi_scratch *scratch, bool cold_boot);
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#endif
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