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https://github.com/riscv-software-src/opensbi.git
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19e966b862
Parsing HART id from a CPU DT node is a common requirement for RISC-V systems. The newly added fdt_parse_hart_id() also helps reduce duplicate code between fdt_cpu_fixup() function and fdt_parse_hart_count() function. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
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/*
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* fdt_helper.h - Flat Device Tree parsing helper routines
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* Implement helper routines to parse FDT nodes on top of
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* libfdt for OpenSBI usage
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*
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* Copyright (C) 2020 Bin Meng <bmeng.cn@gmail.com>
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*/
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#ifndef __FDT_HELPER_H__
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#define __FDT_HELPER_H__
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#include <sbi/sbi_types.h>
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struct fdt_match {
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const char *compatible;
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void *data;
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};
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struct platform_uart_data {
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unsigned long addr;
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unsigned long freq;
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unsigned long baud;
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unsigned long reg_shift;
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unsigned long reg_io_width;
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};
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struct platform_plic_data {
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unsigned long addr;
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unsigned long num_src;
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};
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const struct fdt_match *fdt_match_node(void *fdt, int nodeoff,
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const struct fdt_match *match_table);
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int fdt_find_match(void *fdt, const struct fdt_match *match_table,
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const struct fdt_match **out_match);
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int fdt_get_node_addr_size(void *fdt, int node, unsigned long *addr,
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unsigned long *size);
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int fdt_parse_hart_id(void *fdt, int cpu_offset, u32 *hartid);
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int fdt_parse_sifive_uart_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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int fdt_parse_uart8250_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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int fdt_parse_uart8250(void *fdt, struct platform_uart_data *uart,
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const char *compatible);
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int fdt_parse_plic(void *fdt, struct platform_plic_data *plic,
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const char *compatible);
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int fdt_parse_compat_addr(void *fdt, unsigned long *addr,
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const char *compatible);
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#endif /* __FDT_HELPER_H__ */
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