forked from Mirrors/opensbi
86d2c1797a
Now that the SBI IPI core clears IPIs at warm boot in a generic way, none of the drivers or platforms use these hooks, and we can remove them. Platforms need only to initialize the driver once during cold init. If other hooks are needed in the future, they can be added to struct sbi_ipi_device. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org>
58 lines
1.2 KiB
C
58 lines
1.2 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/sbi_error.h>
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#include <sbi/sbi_scratch.h>
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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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/* List of FDT ipi drivers generated at compile time */
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extern struct fdt_ipi *fdt_ipi_drivers[];
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extern unsigned long fdt_ipi_drivers_size;
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int fdt_ipi_init(void)
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{
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int pos, noff, rc;
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struct fdt_ipi *drv;
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const struct fdt_match *match;
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const void *fdt = fdt_get_address();
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for (pos = 0; pos < fdt_ipi_drivers_size; pos++) {
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drv = fdt_ipi_drivers[pos];
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noff = -1;
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while ((noff = fdt_find_match(fdt, noff,
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drv->match_table, &match)) >= 0) {
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if (!fdt_node_is_enabled(fdt, noff))
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continue;
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/* drv->cold_init must not be NULL */
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if (drv->cold_init == NULL)
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return SBI_EFAIL;
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rc = drv->cold_init(fdt, noff, match);
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if (rc == SBI_ENODEV)
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continue;
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if (rc)
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return rc;
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/*
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* We will have multiple IPI devices on multi-die or
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* multi-socket systems so we cannot break here.
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*/
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}
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}
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/*
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* On some single-hart system there is no need for ipi,
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* so we cannot return a failure here
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*/
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return 0;
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}
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