2009-10-15 20:57:53 +04:00
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/*
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* Definitions for working with the Flattened Device Tree data format
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*
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* Copyright 2009 Benjamin Herrenschmidt, IBM Corp
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* benh@kernel.crashing.org
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*/
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#ifndef _LINUX_OF_FDT_H
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#define _LINUX_OF_FDT_H
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2009-10-15 20:58:04 +04:00
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#include <linux/types.h>
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#include <linux/init.h>
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2016-09-27 23:54:12 +03:00
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#include <linux/errno.h>
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2009-10-15 20:58:04 +04:00
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2009-10-15 20:57:53 +04:00
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/* Definitions used by the flattened device tree */
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#define OF_DT_HEADER 0xd00dfeed /* marker */
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2009-10-15 20:57:55 +04:00
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#ifndef __ASSEMBLY__
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2010-04-14 03:12:25 +04:00
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#if defined(CONFIG_OF_FLATTREE)
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2010-11-19 02:54:59 +03:00
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2011-01-09 07:42:42 +03:00
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struct device_node;
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2010-11-19 02:54:59 +03:00
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/* For scanning an arbitrary device-tree at any time */
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2014-04-02 07:48:01 +04:00
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extern char *of_fdt_get_string(const void *blob, u32 offset);
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extern void *of_fdt_get_property(const void *blob,
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2010-11-19 02:54:59 +03:00
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unsigned long node,
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const char *name,
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2014-04-02 08:49:03 +04:00
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int *size);
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2014-04-02 07:48:01 +04:00
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extern int of_fdt_is_compatible(const void *blob,
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2010-11-19 02:54:59 +03:00
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unsigned long node,
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const char *compat);
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2015-04-09 23:05:15 +03:00
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extern bool of_fdt_is_big_endian(const void *blob,
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unsigned long node);
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2014-04-02 07:48:01 +04:00
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extern int of_fdt_match(const void *blob, unsigned long node,
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2011-12-21 01:56:45 +04:00
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const char *const *compat);
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2016-05-03 16:22:51 +03:00
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extern void *of_fdt_unflatten_tree(const unsigned long *blob,
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struct device_node *dad,
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struct device_node **mynodes);
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2010-11-19 02:54:59 +03:00
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2009-11-24 00:53:09 +03:00
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/* TBD: Temporary export of fdt globals - remove when code fully merged */
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2009-11-24 13:27:10 +03:00
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extern int __initdata dt_root_addr_cells;
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extern int __initdata dt_root_size_cells;
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2014-04-01 00:25:04 +04:00
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extern void *initial_boot_params;
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2009-11-24 00:53:09 +03:00
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2014-04-03 22:38:32 +04:00
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extern char __dtb_start[];
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extern char __dtb_end[];
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2009-10-15 20:58:04 +04:00
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/* For scanning the flat device-tree at boot time */
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2009-11-24 05:49:38 +03:00
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extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname,
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int depth, void *data),
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void *data);
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2016-04-07 15:03:33 +03:00
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extern int of_get_flat_dt_subnode_by_name(unsigned long node,
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const char *uname);
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2014-04-02 08:49:03 +04:00
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extern const void *of_get_flat_dt_prop(unsigned long node, const char *name,
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int *size);
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2009-11-24 05:49:38 +03:00
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extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
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2011-12-21 01:56:45 +04:00
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extern int of_flat_dt_match(unsigned long node, const char *const *matches);
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2009-11-24 05:49:38 +03:00
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extern unsigned long of_get_flat_dt_root(void);
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2014-04-22 21:55:10 +04:00
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extern int of_get_flat_dt_size(void);
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2010-10-20 21:45:14 +04:00
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2009-12-11 09:42:21 +03:00
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extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
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int depth, void *data);
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2010-02-02 07:34:14 +03:00
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extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
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int depth, void *data);
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2016-09-27 23:54:12 +03:00
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extern int early_init_dt_scan_chosen_stdout(void);
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2014-02-28 17:42:47 +04:00
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extern void early_init_fdt_scan_reserved_mem(void);
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2015-06-01 14:40:31 +03:00
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extern void early_init_fdt_reserve_self(void);
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2010-02-02 07:34:14 +03:00
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extern void early_init_dt_add_memory_arch(u64 base, u64 size);
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2014-02-28 17:42:47 +04:00
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extern int early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size,
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bool no_map);
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2011-08-04 13:27:32 +04:00
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extern void * early_init_dt_alloc_memory_arch(u64 size, u64 align);
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2014-04-02 08:49:03 +04:00
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extern u64 dt_mem_next_cell(int s, const __be32 **cellp);
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2009-10-15 20:58:04 +04:00
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2009-11-24 13:27:10 +03:00
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/* Early flat tree scan hooks */
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extern int early_init_dt_scan_root(unsigned long node, const char *uname,
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int depth, void *data);
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2013-08-26 18:47:40 +04:00
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extern bool early_init_dt_scan(void *params);
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2014-07-15 21:03:34 +04:00
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extern bool early_init_dt_verify(void *params);
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extern void early_init_dt_scan_nodes(void);
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2013-08-26 18:47:40 +04:00
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2013-08-28 06:41:56 +04:00
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extern const char *of_flat_dt_get_machine_name(void);
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extern const void *of_flat_dt_match_machine(const void *default_match,
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const void * (*get_next_compat)(const char * const**));
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2009-10-15 20:58:07 +04:00
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/* Other Prototypes */
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extern void unflatten_device_tree(void);
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2013-08-26 20:22:45 +04:00
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extern void unflatten_and_copy_device_tree(void);
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2009-10-15 20:58:07 +04:00
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extern void early_init_devtree(void *);
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2013-12-24 11:12:08 +04:00
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extern void early_get_first_memblock_info(void *, phys_addr_t *);
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2016-01-17 02:23:44 +03:00
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extern u64 of_flat_dt_translate_address(unsigned long node);
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2014-07-15 21:03:35 +04:00
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extern void of_fdt_limit_memory(int limit);
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2010-04-14 03:12:26 +04:00
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#else /* CONFIG_OF_FLATTREE */
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2016-09-27 23:54:12 +03:00
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static inline int early_init_dt_scan_chosen_stdout(void) { return -ENODEV; }
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2014-02-28 17:42:47 +04:00
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static inline void early_init_fdt_scan_reserved_mem(void) {}
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2015-06-01 14:40:31 +03:00
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static inline void early_init_fdt_reserve_self(void) {}
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2013-08-28 06:41:56 +04:00
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static inline const char *of_flat_dt_get_machine_name(void) { return NULL; }
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2010-04-14 03:12:26 +04:00
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static inline void unflatten_device_tree(void) {}
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2013-08-26 20:22:45 +04:00
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static inline void unflatten_and_copy_device_tree(void) {}
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2010-04-14 03:12:25 +04:00
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#endif /* CONFIG_OF_FLATTREE */
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2009-10-15 20:58:07 +04:00
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2009-10-15 20:57:55 +04:00
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#endif /* __ASSEMBLY__ */
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2009-10-15 20:57:53 +04:00
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#endif /* _LINUX_OF_FDT_H */
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