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gerrit-public.fairphone.software / kernel / msm-4.19 / 13d605de2ece8c8f7c17a88747d90b7931350ee5 / . / include / linux / of_fdt.h
blob: 41d432b13553ad32799962e69235f324ca5c56a0 [file] [log] [blame]
Grant Likelyd8678b52009-10-15 10:57:53 -0600[diff] [blame]1/*
2 * Definitions for working with the Flattened Device Tree data format
3 *
4 * Copyright 2009 Benjamin Herrenschmidt, IBM Corp
5 * benh@kernel.crashing.org
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 as published by the Free Software Foundation.
10 */
11
12#ifndef _LINUX_OF_FDT_H
13#define _LINUX_OF_FDT_H
14
Grant Likely8482f562009-10-15 10:58:04 -0600[diff] [blame]15#include <linux/types.h>
16#include <linux/init.h>
17
Grant Likelyd8678b52009-10-15 10:57:53 -0600[diff] [blame]18/* Definitions used by the flattened device tree */
19#define OF_DT_HEADER 0xd00dfeed /* marker */
20#define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
21#define OF_DT_END_NODE 0x2 /* End node */
22#define OF_DT_PROP 0x3 /* Property: name off, size,
23 * content */
24#define OF_DT_NOP 0x4 /* nop */
25#define OF_DT_END 0x9
26
27#define OF_DT_VERSION 0x10
28
Grant Likelyd45d94f2009-10-15 10:57:55 -0600[diff] [blame]29#ifndef __ASSEMBLY__
30/*
31 * This is what gets passed to the kernel by prom_init or kexec
32 *
33 * The dt struct contains the device tree structure, full pathes and
34 * property contents. The dt strings contain a separate block with just
35 * the strings for the property names, and is fully page aligned and
36 * self contained in a page, so that it can be kept around by the kernel,
37 * each property name appears only once in this page (cheap compression)
38 *
39 * the mem_rsvmap contains a map of reserved ranges of physical memory,
40 * passing it here instead of in the device-tree itself greatly simplifies
41 * the job of everybody. It's just a list of u64 pairs (base/size) that
42 * ends when size is 0
43 */
44struct boot_param_header {
45 u32 magic; /* magic word OF_DT_HEADER */
46 u32 totalsize; /* total size of DT block */
47 u32 off_dt_struct; /* offset to structure */
48 u32 off_dt_strings; /* offset to strings */
49 u32 off_mem_rsvmap; /* offset to memory reserve map */
50 u32 version; /* format version */
51 u32 last_comp_version; /* last compatible version */
52 /* version 2 fields below */
53 u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
54 /* version 3 fields below */
55 u32 dt_strings_size; /* size of the DT strings block */
56 /* version 17 fields below */
57 u32 dt_struct_size; /* size of the DT structure block */
58};
59
Grant Likely8482f562009-10-15 10:58:04 -0600[diff] [blame]60/* For scanning the flat device-tree at boot time */
61extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
62 const char *uname, int depth,
63 void *data),
64 void *data);
65extern void __init *of_get_flat_dt_prop(unsigned long node, const char *name,
66 unsigned long *size);
67extern int __init of_flat_dt_is_compatible(unsigned long node,
68 const char *name);
69extern unsigned long __init of_get_flat_dt_root(void);
70
Grant Likely82b29282009-10-15 10:58:07 -0600[diff] [blame]71/* Other Prototypes */
72extern void finish_device_tree(void);
73extern void unflatten_device_tree(void);
74extern void early_init_devtree(void *);
75extern int machine_is_compatible(const char *compat);
76extern void print_properties(struct device_node *node);
77extern int prom_n_intr_cells(struct device_node* np);
78extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
79extern int prom_add_property(struct device_node* np, struct property* prop);
80extern int prom_remove_property(struct device_node *np, struct property *prop);
81extern int prom_update_property(struct device_node *np,
82 struct property *newprop,
83 struct property *oldprop);
84
Grant Likelyd45d94f2009-10-15 10:57:55 -0600[diff] [blame]85#endif /* __ASSEMBLY__ */
Grant Likelyd8678b52009-10-15 10:57:53 -0600[diff] [blame]86#endif /* _LINUX_OF_FDT_H */