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/* SPDX-License-Identifier: Apache-2.0
* Copyright (c) 2024 Cisco Systems, Inc.
*/
#ifndef CLIB_DEVICETREE_H_
#define CLIB_DEVICETREE_H_
#include <vppinfra/clib.h>
#include <vlib/vlib.h>
#ifdef __linux
#define CLIB_DT_LINUX_PREFIX "/sys/firmware/devicetree/base"
#endif
typedef struct
{
char name[32];
u32 size;
u8 data[];
} clib_dt_property_t;
typedef struct clib_dt_main clib_dt_main_t;
typedef struct clib_dt_node
{
u8 *path;
struct clib_dt_node *parent;
struct clib_dt_node *prev;
struct clib_dt_node *next;
struct clib_dt_node **child_nodes;
u8 depth;
clib_dt_property_t *name;
clib_dt_property_t **properties;
clib_dt_main_t *dt_main;
} clib_dt_node_t;
typedef struct clib_dt_main
{
clib_dt_node_t **nodes;
clib_dt_node_t *root;
uword *node_by_path;
uword *node_by_phandle;
} clib_dt_main_t;
clib_dt_node_t *clib_dt_get_node_with_path (clib_dt_main_t *dm, char *fmt,
...);
clib_dt_property_t *clib_dt_get_node_property_by_name (clib_dt_node_t *,
char *);
int clib_dt_node_is_compatible (clib_dt_node_t *, char *);
clib_dt_node_t *clib_dt_dereference_node (clib_dt_node_t *, char *);
#ifdef __linux
clib_error_t *clib_dt_read_from_sysfs (clib_dt_main_t *dm);
#endif
format_function_t format_clib_dt_desc;
format_function_t format_clib_dt_property_data;
static_always_inline int
clib_dt_proprerty_is_u32 (clib_dt_property_t *p)
{
if (p == 0 || p->size != 4)
return 0;
return 1;
}
static_always_inline u32
clib_dt_proprerty_get_u32 (clib_dt_property_t *p)
{
return clib_net_to_host_u32 (*(u32u *) p->data);
}
#endif /* CLIB_DEVICETREE_H_ */
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