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gerrit-public.fairphone.software / kernel / msm-4.9 / 1406bc2f57787797d1f6a3675c019a7093769275 / . / include / linux / of_fdt.h
blob: f32f0fc5314a32b8cd6ce4f31251df0f809aaaff [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 Likelye169cfb2009-11-23 14:53:09 -0700[diff] [blame]60/* TBD: Temporary export of fdt globals - remove when code fully merged */
Grant Likelyf00abd92009-11-24 03:27:10 -0700[diff] [blame]61extern int __initdata dt_root_addr_cells;
62extern int __initdata dt_root_size_cells;
Grant Likelye169cfb2009-11-23 14:53:09 -0700[diff] [blame]63extern struct boot_param_header *initial_boot_params;
64
Grant Likely8482f562009-10-15 10:58:04 -0600[diff] [blame]65/* For scanning the flat device-tree at boot time */
Grant Likelye169cfb2009-11-23 14:53:09 -0700[diff] [blame]66extern char *find_flat_dt_string(u32 offset);
Grant Likely31a6a872009-11-23 19:49:38 -0700[diff] [blame]67extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname,
68 int depth, void *data),
69 void *data);
70extern void *of_get_flat_dt_prop(unsigned long node, const char *name,
71 unsigned long *size);
72extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
73extern unsigned long of_get_flat_dt_root(void);
Grant Likely86e03222009-12-10 23:42:21 -0700[diff] [blame]74extern void early_init_dt_scan_chosen_arch(unsigned long node);
75extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
76 int depth, void *data);
Grant Likelyf7b3a832009-11-24 03:26:58 -0700[diff] [blame]77extern void early_init_dt_check_for_initrd(unsigned long node);
Grant Likely51975db2010-02-01 21:34:14 -0700[diff] [blame]78extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
79 int depth, void *data);
80extern void early_init_dt_add_memory_arch(u64 base, u64 size);
Grant Likely83f7a062009-11-24 03:37:56 -0700[diff] [blame]81extern u64 dt_mem_next_cell(int s, u32 **cellp);
Grant Likely8482f562009-10-15 10:58:04 -0600[diff] [blame]82
Jeremy Kerr1406bc22010-01-30 01:31:21 -0700[diff] [blame^]83/*
84 * If BLK_DEV_INITRD, the fdt early init code will call this function,
85 * to be provided by the arch code. start and end are specified as
86 * physical addresses.
87 */
88#ifdef CONFIG_BLK_DEV_INITRD
89extern void early_init_dt_setup_initrd_arch(unsigned long start,
90 unsigned long end);
91#endif
92
Grant Likelyf00abd92009-11-24 03:27:10 -0700[diff] [blame]93/* Early flat tree scan hooks */
94extern int early_init_dt_scan_root(unsigned long node, const char *uname,
95 int depth, void *data);
96
Grant Likely82b29282009-10-15 10:58:07 -0600[diff] [blame]97/* Other Prototypes */
98extern void finish_device_tree(void);
99extern void unflatten_device_tree(void);
100extern void early_init_devtree(void *);
Grant Likely71a157e2010-02-01 21:34:14 -0700[diff] [blame]101extern int of_machine_is_compatible(const char *compat);
Grant Likely82b29282009-10-15 10:58:07 -0600[diff] [blame]102extern void print_properties(struct device_node *node);
103extern int prom_n_intr_cells(struct device_node* np);
104extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
105extern int prom_add_property(struct device_node* np, struct property* prop);
106extern int prom_remove_property(struct device_node *np, struct property *prop);
107extern int prom_update_property(struct device_node *np,
108 struct property *newprop,
109 struct property *oldprop);
110
Grant Likelyd45d94f2009-10-15 10:57:55 -0600[diff] [blame]111#endif /* __ASSEMBLY__ */
Grant Likelyd8678b52009-10-15 10:57:53 -0600[diff] [blame]112#endif /* _LINUX_OF_FDT_H */