mirror of
https://github.com/riscv-software-src/opensbi
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a524f0a507
The serial driver subsystem does not need any extra data, so it can use `struct fdt_driver` directly. The generic fdt_serial_init() first attempts to match the chosen stdout device, and upon failure matches the first available serial device in the DT. It is a fatal error if no such device is found. This matches the behavior of fdt_driver_init_one(). Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org>
48 lines
1.1 KiB
C
48 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/riscv_asm.h>
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#include <sbi/sbi_domain.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/serial/fdt_serial.h>
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#include <sbi_utils/sys/htif.h>
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static const struct fdt_match serial_htif_match[] = {
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{ .compatible = "ucb,htif0" },
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{ },
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};
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static int serial_htif_init(const 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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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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rc = sbi_domain_root_add_memrange(fromhost_addr, PAGE_SIZE, PAGE_SIZE,
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(SBI_DOMAIN_MEMREGION_MMIO |
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SBI_DOMAIN_MEMREGION_SHARED_SURW_MRW));
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if (rc)
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return rc;
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return htif_serial_init(custom, fromhost_addr, tohost_addr);
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}
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const struct fdt_driver fdt_serial_htif = {
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.match_table = serial_htif_match,
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.init = serial_htif_init
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};
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