diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/device_tree.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/include/device_tree.h b/src/include/device_tree.h index e7b79e1a94..6d2d65600f 100644 --- a/src/include/device_tree.h +++ b/src/include/device_tree.h @@ -4,6 +4,7 @@ #ifndef __DEVICE_TREE_H__ #define __DEVICE_TREE_H__ +#include <stdbool.h> #include <stddef.h> #include <stdint.h> #include <commonlib/list.h> @@ -33,6 +34,7 @@ struct fdt_header { #define FDT_TOKEN_BEGIN_NODE 1 #define FDT_TOKEN_END_NODE 2 #define FDT_TOKEN_PROPERTY 3 +#define FDT_TOKEN_NOP 4 #define FDT_TOKEN_END 9 #define FDT_PHANDLE_ILLEGAL 0xdeadbeef @@ -47,6 +49,11 @@ struct fdt_property * Unflattened device tree structures. */ +struct device_tree_region { + u64 addr; + u64 size; +}; + struct device_tree_property { struct fdt_property prop; @@ -91,6 +98,8 @@ struct device_tree * which were consumed reading the requested value. */ +/* Checks if blob points to a valid FDT */ +bool fdt_is_valid(const void *blob); /* Read the property at offset, if any exists. */ int fdt_next_property(const void *blob, uint32_t offset, struct fdt_property *prop); @@ -100,6 +109,26 @@ int fdt_node_name(const void *blob, uint32_t offset, const char **name); void fdt_print_node(const void *blob, uint32_t offset); int fdt_skip_node(const void *blob, uint32_t offset); +/* Read property and put into fdt_prop. Returns offset to property */ +u32 fdt_read_prop(const void *blob, u32 node_offset, const char *prop_name, + struct fdt_property *fdt_prop); +/* Read reg property and save regions inside 'regions'. Returns number of regions read */ +u32 fdt_read_reg_prop(const void *blob, u32 node_offset, u32 addr_cells, u32 size_cells, + struct device_tree_region regions[], size_t regions_count); +/* Find a node by a given path and return the offset */ +u32 fdt_find_node_by_path(const void *blob, const char *path, u32 *addrcp, u32 *sizecp); +/* Find multiple nodes matching a given pattern. Returns number of nodes found */ +size_t fdt_find_subnodes_by_prefix(const void *blob, u32 node_offset, const char *prefix, + u32 *addrcp, u32 *sizecp, u32 results[], size_t results_len); +/* Find a node by a given alias and return its offset */ +u32 fdt_find_node_by_alias(const void *blob, const char *alias_name, + u32 *addr_cells, u32 *size_cells); +/* + * Read the node name into 'name' of the node behind 'node_offset' + * and return total bytes used for name + */ +int fdt_next_node_name(const void *blob, uint32_t node_offset, const char **name); + /* Read a flattened device tree into a hierarchical structure which refers to the contents of the flattened tree in place. Modifying the flat tree invalidates the unflattened one. */ |