1 /* 2 * Header with function prototypes to help device tree manipulation using 3 * libfdt. It also provides functions to read entries from device tree proc 4 * interface. 5 * 6 * Copyright 2008 IBM Corporation. 7 * Authors: Jerone Young <jyoung5@us.ibm.com> 8 * Hollis Blanchard <hollisb@us.ibm.com> 9 * 10 * This work is licensed under the GNU GPL license version 2 or later. 11 * 12 */ 13 14 #ifndef __DEVICE_TREE_H__ 15 #define __DEVICE_TREE_H__ 16 17 void *create_device_tree(int *sizep); 18 void *load_device_tree(const char *filename_path, int *sizep); 19 20 int qemu_devtree_setprop(void *fdt, const char *node_path, 21 const char *property, void *val_array, int size); 22 int qemu_devtree_setprop_cell(void *fdt, const char *node_path, 23 const char *property, uint32_t val); 24 int qemu_devtree_setprop_u64(void *fdt, const char *node_path, 25 const char *property, uint64_t val); 26 int qemu_devtree_setprop_string(void *fdt, const char *node_path, 27 const char *property, const char *string); 28 int qemu_devtree_setprop_phandle(void *fdt, const char *node_path, 29 const char *property, 30 const char *target_node_path); 31 uint32_t qemu_devtree_get_phandle(void *fdt, const char *path); 32 uint32_t qemu_devtree_alloc_phandle(void *fdt); 33 int qemu_devtree_nop_node(void *fdt, const char *node_path); 34 int qemu_devtree_add_subnode(void *fdt, const char *name); 35 36 #define qemu_devtree_setprop_cells(fdt, node_path, property, ...) \ 37 do { \ 38 uint32_t qdt_tmp[] = { __VA_ARGS__ }; \ 39 int i; \ 40 \ 41 for (i = 0; i < ARRAY_SIZE(qdt_tmp); i++) { \ 42 qdt_tmp[i] = cpu_to_be32(qdt_tmp[i]); \ 43 } \ 44 qemu_devtree_setprop(fdt, node_path, property, qdt_tmp, \ 45 sizeof(qdt_tmp)); \ 46 } while (0) 47 48 #endif /* __DEVICE_TREE_H__ */ 49