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/*
* Copyright (c) 2018-2022, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/* Helper functions to offer easier navigation of Device Tree Blob */
#ifndef FDT_WRAPPERS_H
#define FDT_WRAPPERS_H
#include <libfdt_env.h>
/* Number of cells, given total length in bytes. Each cell is 4 bytes long */
#define NCELLS(len) ((len) / 4U)
int fdt_read_uint32(const void *dtb, int node, const char *prop_name,
uint32_t *value);
uint32_t fdt_read_uint32_default(const void *dtb, int node,
const char *prop_name, uint32_t dflt_value);
int fdt_read_uint64(const void *dtb, int node, const char *prop_name,
uint64_t *value);
int fdt_read_uint32_array(const void *dtb, int node, const char *prop_name,
unsigned int cells, uint32_t *value);
int fdtw_read_string(const void *dtb, int node, const char *prop,
char *str, size_t size);
int fdtw_read_uuid(const void *dtb, int node, const char *prop,
unsigned int length, uint8_t *uuid);
int fdtw_write_inplace_cells(void *dtb, int node, const char *prop,
unsigned int cells, void *value);
int fdtw_read_bytes(const void *dtb, int node, const char *prop,
unsigned int length, void *value);
int fdtw_write_inplace_bytes(void *dtb, int node, const char *prop,
unsigned int length, const void *data);
int fdt_get_reg_props_by_index(const void *dtb, int node, int index,
uintptr_t *base, size_t *size);
int fdt_get_reg_props_by_name(const void *dtb, int node, const char *name,
uintptr_t *base, size_t *size);
int fdt_get_stdout_node_offset(const void *dtb);
uint64_t fdtw_translate_address(const void *dtb, int bus_node,
uint64_t base_address);
int fdtw_for_each_cpu(const void *fdt,
int (*callback)(const void *dtb, int node, uintptr_t mpidr));
int fdtw_find_or_add_subnode(void *fdt, int parentoffset, const char *name);
static inline uint32_t fdt_blob_size(const void *dtb)
{
const uint32_t *dtb_header = dtb;
return fdt32_to_cpu(dtb_header[1]);
}
#define fdt_for_each_compatible_node(dtb, node, compatible_str) \
for (node = fdt_node_offset_by_compatible(dtb, -1, compatible_str); \
node >= 0; \
node = fdt_node_offset_by_compatible(dtb, node, compatible_str))
#endif /* FDT_WRAPPERS_H */
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