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https://github.com/riscv-software-src/opensbi
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The reset driver subsystem does not need any extra data, so it can use `struct fdt_driver` directly. The generic fdt_reset_init() performs a best-effort initialization of all matching DT nodes. Platform-specific logic expects exactly one DT node to match a single driver. This is accomplished by using fdt_driver_init_one() with a local list containing that one driver. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org>
39 lines
924 B
C
39 lines
924 B
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/reset/fdt_reset.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/sys/htif.h>
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static int htif_reset_init(const void *fdt, int nodeoff,
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const struct fdt_match *match)
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{
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bool custom = false;
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uint64_t fromhost_addr = 0, tohost_addr = 0;
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if (!fdt_get_node_addr_size(fdt, nodeoff, 0, &fromhost_addr, NULL)) {
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custom = true;
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tohost_addr = fromhost_addr + sizeof(uint64_t);
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}
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fdt_get_node_addr_size(fdt, nodeoff, 1, &tohost_addr, NULL);
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return htif_system_reset_init(custom, fromhost_addr, tohost_addr);
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}
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static const struct fdt_match htif_reset_match[] = {
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{ .compatible = "ucb,htif0" },
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{ },
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};
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const struct fdt_driver fdt_reset_htif = {
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.match_table = htif_reset_match,
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.init = htif_reset_init
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};
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