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// SPDX-License-Identifier: BSD-2-Clause
/*
* fdt_helper.h - Flat Device Tree parsing helper routines
* Implement helper routines to parse FDT nodes on top of
* libfdt for OpenSBI usage
*
* Copyright (C) 2020 Bin Meng <bmeng.cn@gmail.com>
*/
#ifndef __FDT_HELPER_H__
#define __FDT_HELPER_H__
#include <sbi/sbi_types.h>
#include <sbi/sbi_scratch.h>
struct fdt_match {
const char *compatible;
const void *data;
};
#define FDT_MAX_PHANDLE_ARGS 16
struct fdt_phandle_args {
int node_offset;
int args_count;
u32 args[FDT_MAX_PHANDLE_ARGS];
};
struct platform_uart_data {
unsigned long addr;
unsigned long freq;
unsigned long baud;
unsigned long reg_shift;
unsigned long reg_io_width;
unsigned long reg_offset;
};
const struct fdt_match *fdt_match_node(void *fdt, int nodeoff,
const struct fdt_match *match_table);
int fdt_find_match(void *fdt, int startoff,
const struct fdt_match *match_table,
const struct fdt_match **out_match);
int fdt_parse_phandle_with_args(void *fdt, int nodeoff,
const char *prop, const char *cells_prop,
int index, struct fdt_phandle_args *out_args);
int fdt_get_node_addr_size(void *fdt, int node, int index,
uint64_t *addr, uint64_t *size);
bool fdt_node_is_enabled(void *fdt, int nodeoff);
int fdt_parse_hart_id(void *fdt, int cpu_offset, u32 *hartid);
int fdt_parse_max_enabled_hart_id(void *fdt, u32 *max_hartid);
int fdt_parse_timebase_frequency(void *fdt, unsigned long *freq);
int fdt_parse_gaisler_uart_node(void *fdt, int nodeoffset,
struct platform_uart_data *uart);
int fdt_parse_renesas_scif_node(void *fdt, int nodeoffset,
struct platform_uart_data *uart);
int fdt_parse_shakti_uart_node(void *fdt, int nodeoffset,
struct platform_uart_data *uart);
int fdt_parse_sifive_uart_node(void *fdt, int nodeoffset,
struct platform_uart_data *uart);
int fdt_parse_uart_node(void *fdt, int nodeoffset,
struct platform_uart_data *uart);
int fdt_parse_uart8250(void *fdt, struct platform_uart_data *uart,
const char *compatible);
int fdt_parse_xlnx_uartlite_node(void *fdt, int nodeoffset,
struct platform_uart_data *uart);
struct aplic_data;
int fdt_parse_aplic_node(void *fdt, int nodeoff, struct aplic_data *aplic);
struct imsic_data;
bool fdt_check_imsic_mlevel(void *fdt);
int fdt_parse_imsic_node(void *fdt, int nodeoff, struct imsic_data *imsic);
struct plic_data;
int fdt_parse_plic_node(void *fdt, int nodeoffset, struct plic_data *plic);
int fdt_parse_plic(void *fdt, struct plic_data *plic, const char *compat);
int fdt_parse_aclint_node(void *fdt, int nodeoffset, bool for_timer,
unsigned long *out_addr1, unsigned long *out_size1,
unsigned long *out_addr2, unsigned long *out_size2,
u32 *out_first_hartid, u32 *out_hart_count);
int fdt_parse_plmt_node(void *fdt, int nodeoffset, unsigned long *plmt_base,
unsigned long *plmt_size, u32 *hart_count);
int fdt_parse_plicsw_node(void *fdt, int nodeoffset, unsigned long *plicsw_base,
unsigned long *size, u32 *hart_count);
int fdt_parse_compat_addr(void *fdt, uint64_t *addr,
const char *compatible);
static inline void *fdt_get_address(void)
{
return sbi_scratch_thishart_arg1_ptr();
}
#endif /* __FDT_HELPER_H__ */
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