forked from Mirrors/opensbi
a9a9751185
We extend CLINT cold init function to have a "struct clint_data *" parameter pointing to CLINT details. This allows platforms to use CLINT functions for multiple CLINT instances. When multiple CLINTs are present, the platform can also provide one of the CLINT as reference CLINT for other CLINTs. This will help CLINTs to sync their time value with reference CLINT using a time_delta computed in warm init function. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-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) 2020 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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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/ipi/fdt_ipi.h>
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#include <sbi_utils/sys/clint.h>
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static struct clint_data clint_ipi;
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static int ipi_clint_cold_init(void *fdt, int nodeoff,
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const struct fdt_match *match)
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{
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int rc;
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u32 max_hartid;
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unsigned long addr;
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rc = fdt_parse_max_hart_id(fdt, &max_hartid);
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if (rc)
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return rc;
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rc = fdt_get_node_addr_size(fdt, nodeoff, &addr, NULL);
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if (rc)
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return rc;
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/* TODO: We should figure-out CLINT has_64bit_mmio from DT node */
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clint_ipi.addr = addr;
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clint_ipi.first_hartid = 0;
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clint_ipi.hart_count = max_hartid + 1;
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clint_ipi.has_64bit_mmio = TRUE;
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return clint_cold_ipi_init(&clint_ipi);
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}
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static const struct fdt_match ipi_clint_match[] = {
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{ .compatible = "riscv,clint0" },
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{ },
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};
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struct fdt_ipi fdt_ipi_clint = {
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.match_table = ipi_clint_match,
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.cold_init = ipi_clint_cold_init,
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.warm_init = clint_warm_ipi_init,
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.exit = NULL,
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.send = clint_ipi_send,
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.clear = clint_ipi_clear,
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};
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