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https://github.com/riscv-software-src/opensbi
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6dde43584f
Some of RISC-V emulators provide HTIF at fixed base address so for such emulators users have to hard-code HTIF base address in the linker script. To address this problem, we let users optionally provide fixed HTIF base address via platform support (or device tree). Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Dong Du <Dd_nirvana@sjtu.edu.cn> Reviewed-by: Atish Patra <atishp@rivosinc.com>
39 lines
914 B
C
39 lines
914 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/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(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_serial_init(custom, fromhost_addr, tohost_addr);
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}
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struct fdt_serial 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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