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/*
* Definitions for working with the Flattened Device Tree data format
*
* Copyright 2009 Benjamin Herrenschmidt, IBM Corp
* benh@kernel.crashing.org
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*/
#ifndef _LINUX_OF_FDT_H
#define _LINUX_OF_FDT_H
#include <linux/types.h>
#include <linux/init.h>
#define OF_DT_HEADER 0xd00dfeed
#define OF_DT_BEGIN_NODE 0x1
#define OF_DT_END_NODE 0x2
#define OF_DT_PROP 0x3
#define OF_DT_NOP 0x4
#define OF_DT_END 0x9
#define OF_DT_VERSION 0x10
#ifndef __ASSEMBLY__
struct boot_param_header {
__be32 magic;
__be32 totalsize;
__be32 off_dt_struct;
__be32 off_dt_strings;
__be32 off_mem_rsvmap;
__be32 version;
__be32 last_comp_version;
__be32 boot_cpuid_phys;
__be32 dt_strings_size;
__be32 dt_struct_size;
};
#if defined(CONFIG_OF_FLATTREE)
struct device_node;
extern char *of_fdt_get_string(struct boot_param_header *blob, u32 offset);
extern void *of_fdt_get_property(struct boot_param_header *blob,
unsigned long node,
const char *name,
unsigned long *size);
extern int of_fdt_is_compatible(struct boot_param_header *blob,
unsigned long node,
const char *compat);
extern int of_fdt_match(struct boot_param_header *blob, unsigned long node,
const char *const *compat);
extern void of_fdt_unflatten_tree(unsigned long *blob,
struct device_node **mynodes);
extern int __initdata dt_root_addr_cells;
extern int __initdata dt_root_size_cells;
extern struct boot_param_header *initial_boot_params;
extern char *find_flat_dt_string(u32 offset);
extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname,
int depth, void *data),
void *data);
extern void *of_get_flat_dt_prop(unsigned long node, const char *name,
unsigned long *size);
extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
extern int of_flat_dt_match(unsigned long node, const char *const *matches);
extern unsigned long of_get_flat_dt_root(void);
extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
int depth, void *data);
extern void early_init_dt_check_for_initrd(unsigned long node);
extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
int depth, void *data);
extern void early_init_dt_add_memory_arch(u64 base, u64 size);
extern void * early_init_dt_alloc_memory_arch(u64 size, u64 align);
extern u64 dt_mem_next_cell(int s, __be32 **cellp);
#ifdef CONFIG_BLK_DEV_INITRD
extern void early_init_dt_setup_initrd_arch(unsigned long start,
unsigned long end);
#endif
extern int early_init_dt_scan_root(unsigned long node, const char *uname,
int depth, void *data);
extern void unflatten_device_tree(void);
extern void early_init_devtree(void *);
#else
static inline void unflatten_device_tree(void) {}
#endif
#endif
#endif
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