forked from Mirrors/opensbi
6112d584d4
Currently, the fdt_parse_aclint_node() follows a fixed order to parse ACLINT timer. This may cause the undesirable result when the ACLINT device does not support mtime without adding an empty entry for it in the DT. To be robust, make fdt_parse_aclint_node() support "reg-names" property, so it can parse the DT in an order independent way. For compatibility, fdt_parse_aclint_node() only use "reg-names" when parsing ACLINT timer, and will fallback to the old way if "reg-names" property is not found. Link: https://lore.kernel.org/all/20231114-skedaddle-precinct-66c8897227bb@squawk/ Signed-off-by: Inochi Amaoto <inochiama@outlook.com> Reviewed-by: Anup patel <anup@brainfault.org>
122 lines
3.4 KiB
C
122 lines
3.4 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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#include <sbi/sbi_domain.h>
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struct fdt_match {
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const char *compatible;
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const void *data;
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};
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#define FDT_MAX_PHANDLE_ARGS 16
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struct fdt_phandle_args {
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int node_offset;
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int args_count;
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u32 args[FDT_MAX_PHANDLE_ARGS];
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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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unsigned long reg_offset;
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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, int startoff,
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const struct fdt_match *match_table,
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const struct fdt_match **out_match);
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int fdt_parse_phandle_with_args(void *fdt, int nodeoff,
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const char *prop, const char *cells_prop,
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int index, struct fdt_phandle_args *out_args);
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int fdt_get_node_addr_size(void *fdt, int node, int index,
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uint64_t *addr, uint64_t *size);
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int fdt_get_node_addr_size_by_name(void *fdt, int node, const char *name,
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uint64_t *addr, uint64_t *size);
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bool fdt_node_is_enabled(void *fdt, int nodeoff);
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int fdt_parse_hart_id(void *fdt, int cpu_offset, u32 *hartid);
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int fdt_parse_max_enabled_hart_id(void *fdt, u32 *max_hartid);
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int fdt_parse_timebase_frequency(void *fdt, unsigned long *freq);
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int fdt_parse_isa_extensions(void *fdt, unsigned int hard_id,
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unsigned long *extensions);
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int fdt_parse_gaisler_uart_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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int fdt_parse_renesas_scif_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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int fdt_parse_shakti_uart_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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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_uart_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_xlnx_uartlite_node(void *fdt, int nodeoffset,
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struct platform_uart_data *uart);
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struct aplic_data;
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int fdt_parse_aplic_node(void *fdt, int nodeoff, struct aplic_data *aplic);
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struct imsic_data;
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bool fdt_check_imsic_mlevel(void *fdt);
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int fdt_parse_imsic_node(void *fdt, int nodeoff, struct imsic_data *imsic);
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struct plic_data;
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int fdt_parse_plic_node(void *fdt, int nodeoffset, struct plic_data *plic);
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int fdt_parse_plic(void *fdt, struct plic_data *plic, const char *compat);
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int fdt_parse_aclint_node(void *fdt, int nodeoffset, bool for_timer,
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unsigned long *out_addr1, unsigned long *out_size1,
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unsigned long *out_addr2, unsigned long *out_size2,
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u32 *out_first_hartid, u32 *out_hart_count);
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int fdt_parse_plmt_node(void *fdt, int nodeoffset, unsigned long *plmt_base,
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unsigned long *plmt_size, u32 *hart_count);
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int fdt_parse_plicsw_node(void *fdt, int nodeoffset, unsigned long *plicsw_base,
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unsigned long *size, u32 *hart_count);
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int fdt_parse_compat_addr(void *fdt, uint64_t *addr,
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const char *compatible);
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static inline void *fdt_get_address(void)
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{
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return (void *)root.next_arg1;
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}
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#endif /* __FDT_HELPER_H__ */
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