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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108/* SPDX-License-Identifier: GPL-2.0 *//* * Definitions for working with the Flattened Device Tree data format * * Copyright 2009 Benjamin Herrenschmidt, IBM Corp * benh@kernel.crashing.org */
#ifndef _LINUX_OF_FDT_H#define _LINUX_OF_FDT_H
#include <linux/types.h>#include <linux/init.h>#include <linux/errno.h>
/* Definitions used by the flattened device tree */#define OF_DT_HEADER 0xd00dfeed /* marker */
#ifndef __ASSEMBLY__
#if defined(CONFIG_OF_FLATTREE)
struct device_node;
/* For scanning an arbitrary device-tree at any time */extern void *of_fdt_unflatten_tree(const unsigned long *blob, struct device_node *dad, struct device_node **mynodes);
/* TBD: Temporary export of fdt globals - remove when code fully merged */extern int __initdata dt_root_addr_cells;extern int __initdata dt_root_size_cells;extern void *initial_boot_params;extern phys_addr_t initial_boot_params_pa;
extern char __dtb_start[];extern char __dtb_end[];
/* Other Prototypes */extern u64 of_flat_dt_translate_address(unsigned long node);extern void of_fdt_limit_memory(int limit);#endif /* CONFIG_OF_FLATTREE */
#ifdef CONFIG_OF_EARLY_FLATTREE/* For scanning the flat device-tree at boot time */extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname, int depth, void *data), void *data);extern int of_scan_flat_dt_subnodes(unsigned long node, int (*it)(unsigned long node, const char *uname, void *data), void *data);extern int of_get_flat_dt_subnode_by_name(unsigned long node, const char *uname);extern const void *of_get_flat_dt_prop(unsigned long node, const char *name, int *size);
extern const __be32 *of_flat_dt_get_addr_size_prop(unsigned long node, const char *name, int *entries);extern bool of_flat_dt_get_addr_size(unsigned long node, const char *name, u64 *addr, u64 *size);extern void of_flat_dt_read_addr_size(const __be32 *prop, int entry_index, u64 *addr, u64 *size);
extern int of_flat_dt_is_compatible(unsigned long node, const char *name);extern unsigned long of_get_flat_dt_root(void);extern uint32_t of_get_flat_dt_phandle(unsigned long node);
extern int early_init_dt_scan_chosen(char *cmdline);extern int early_init_dt_scan_memory(void);extern void early_init_dt_check_for_usable_mem_range(void);extern int early_init_dt_scan_chosen_stdout(void);extern void early_init_fdt_scan_reserved_mem(void);extern void early_init_fdt_reserve_self(void);extern void early_init_dt_add_memory_arch(u64 base, u64 size);extern u64 dt_mem_next_cell(int s, const __be32 **cellp);
/* Early flat tree scan hooks */extern int early_init_dt_scan_root(void);
extern bool early_init_dt_scan(void *dt_virt, phys_addr_t dt_phys);extern bool early_init_dt_verify(void *dt_virt, phys_addr_t dt_phys);extern void early_init_dt_scan_nodes(void);
extern const char *of_flat_dt_get_machine_name(void);extern const void *of_flat_dt_match_machine(const void *default_match, const void * (*get_next_compat)(const char * const**));
/* Other Prototypes */extern void unflatten_device_tree(void);extern void unflatten_and_copy_device_tree(void);extern void early_init_devtree(void *);extern void early_get_first_memblock_info(void *, phys_addr_t *);#else /* CONFIG_OF_EARLY_FLATTREE */static inline void early_init_dt_check_for_usable_mem_range(void) {}static inline int early_init_dt_scan_chosen_stdout(void) { return -ENODEV; }static inline void early_init_fdt_scan_reserved_mem(void) {}static inline void early_init_fdt_reserve_self(void) {}static inline const char *of_flat_dt_get_machine_name(void) { return NULL; }static inline void unflatten_device_tree(void) {}static inline void unflatten_and_copy_device_tree(void) {}#endif /* CONFIG_OF_EARLY_FLATTREE */
#endif /* __ASSEMBLY__ */#endif /* _LINUX_OF_FDT_H */