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1#ifndef _POWERPC_PROM_H
2#define _POWERPC_PROM_H
3#ifdef __KERNEL__
4
5/*
6 * Definitions for talking to the Open Firmware PROM on
7 * Power Macintosh computers.
8 *
9 * Copyright (C) 1996-2005 Paul Mackerras.
10 *
11 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
17 */
18#include <linux/config.h>
19#include <linux/types.h>
20#include <linux/proc_fs.h>
21#include <asm/atomic.h>
22
23/* Definitions used by the flattened device tree */
24#define OF_DT_HEADER 0xd00dfeed /* marker */
25#define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
26#define OF_DT_END_NODE 0x2 /* End node */
27#define OF_DT_PROP 0x3 /* Property: name off, size,
28 * content */
29#define OF_DT_NOP 0x4 /* nop */
30#define OF_DT_END 0x9
31
32#define OF_DT_VERSION 0x10
33
34/*
35 * This is what gets passed to the kernel by prom_init or kexec
36 *
37 * The dt struct contains the device tree structure, full pathes and
38 * property contents. The dt strings contain a separate block with just
39 * the strings for the property names, and is fully page aligned and
40 * self contained in a page, so that it can be kept around by the kernel,
41 * each property name appears only once in this page (cheap compression)
42 *
43 * the mem_rsvmap contains a map of reserved ranges of physical memory,
44 * passing it here instead of in the device-tree itself greatly simplifies
45 * the job of everybody. It's just a list of u64 pairs (base/size) that
46 * ends when size is 0
47 */
48struct boot_param_header
49{
50 u32 magic; /* magic word OF_DT_HEADER */
51 u32 totalsize; /* total size of DT block */
52 u32 off_dt_struct; /* offset to structure */
53 u32 off_dt_strings; /* offset to strings */
54 u32 off_mem_rsvmap; /* offset to memory reserve map */
55 u32 version; /* format version */
56 u32 last_comp_version; /* last compatible version */
57 /* version 2 fields below */
58 u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
59 /* version 3 fields below */
60 u32 dt_strings_size; /* size of the DT strings block */
61};
62
63
64
65typedef u32 phandle;
66typedef u32 ihandle;
67
68struct interrupt_info {
69 int line;
70 int sense; /* +ve/-ve logic, edge or level, etc. */
71};
72
73struct property {
74 char *name;
75 int length;
76 unsigned char *value;
77 struct property *next;
78};
79
80struct device_node {
81 char *name;
82 char *type;
83 phandle node;
84 phandle linux_phandle;
85 int n_intrs;
86 struct interrupt_info *intrs;
87 char *full_name;
88
89 struct property *properties;
90 struct property *deadprops; /* removed properties */
91 struct device_node *parent;
92 struct device_node *child;
93 struct device_node *sibling;
94 struct device_node *next; /* next device of same type */
95 struct device_node *allnext; /* next in list of all nodes */
96 struct proc_dir_entry *pde; /* this node's proc directory */
97 struct kref kref;
98 unsigned long _flags;
99 void *data;
100};
101
102extern struct device_node *of_chosen;
103
104/* flag descriptions */
105#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
106
107#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
108#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
109
110#define HAVE_ARCH_DEVTREE_FIXUPS
111
112static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
113{
114 dn->pde = de;
115}
116
117
118/* OBSOLETE: Old style node lookup */
119extern struct device_node *find_devices(const char *name);
120extern struct device_node *find_type_devices(const char *type);
121extern struct device_node *find_path_device(const char *path);
122extern struct device_node *find_compatible_devices(const char *type,
123 const char *compat);
124extern struct device_node *find_all_nodes(void);
125
126/* New style node lookup */
127extern struct device_node *of_find_node_by_name(struct device_node *from,
128 const char *name);
129extern struct device_node *of_find_node_by_type(struct device_node *from,
130 const char *type);
131extern struct device_node *of_find_compatible_node(struct device_node *from,
132 const char *type, const char *compat);
133extern struct device_node *of_find_node_by_path(const char *path);
134extern struct device_node *of_find_node_by_phandle(phandle handle);
135extern struct device_node *of_find_all_nodes(struct device_node *prev);
136extern struct device_node *of_get_parent(const struct device_node *node);
137extern struct device_node *of_get_next_child(const struct device_node *node,
138 struct device_node *prev);
139extern struct property *of_find_property(struct device_node *np,
140 const char *name,
141 int *lenp);
142extern struct device_node *of_node_get(struct device_node *node);
143extern void of_node_put(struct device_node *node);
144
145/* For scanning the flat device-tree at boot time */
146int __init of_scan_flat_dt(int (*it)(unsigned long node,
147 const char *uname, int depth,
148 void *data),
149 void *data);
150void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
151 unsigned long *size);
152
153/* For updating the device tree at runtime */
154extern void of_attach_node(struct device_node *);
155extern void of_detach_node(const struct device_node *);
156
157/* Other Prototypes */
158extern void finish_device_tree(void);
159extern void unflatten_device_tree(void);
160extern void early_init_devtree(void *);
161extern int device_is_compatible(struct device_node *device, const char *);
162extern int machine_is_compatible(const char *compat);
163extern unsigned char *get_property(struct device_node *node, const char *name,
164 int *lenp);
165extern void print_properties(struct device_node *node);
166extern int prom_n_addr_cells(struct device_node* np);
167extern int prom_n_size_cells(struct device_node* np);
168extern int prom_n_intr_cells(struct device_node* np);
169extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
170extern int prom_add_property(struct device_node* np, struct property* prop);
171extern int prom_remove_property(struct device_node *np, struct property *prop);
172extern int prom_update_property(struct device_node *np,
173 struct property *newprop,
174 struct property *oldprop);
175
176#ifdef CONFIG_PPC32
177/*
178 * PCI <-> OF matching functions
179 * (XXX should these be here?)
180 */
181struct pci_bus;
182struct pci_dev;
183extern int pci_device_from_OF_node(struct device_node *node,
184 u8* bus, u8* devfn);
185extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
186extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
187extern void pci_create_OF_bus_map(void);
188#endif
189
190extern struct resource *request_OF_resource(struct device_node* node,
191 int index, const char* name_postfix);
192extern int release_OF_resource(struct device_node* node, int index);
193
194
195/*
196 * OF address retreival & translation
197 */
198
199
200/* Translate an OF address block into a CPU physical address
201 */
202#define OF_BAD_ADDR ((u64)-1)
203extern u64 of_translate_address(struct device_node *np, u32 *addr);
204
205/* Extract an address from a device, returns the region size and
206 * the address space flags too. The PCI version uses a BAR number
207 * instead of an absolute index
208 */
209extern u32 *of_get_address(struct device_node *dev, int index,
210 u64 *size, unsigned int *flags);
211extern u32 *of_get_pci_address(struct device_node *dev, int bar_no,
212 u64 *size, unsigned int *flags);
213
214/* Get an address as a resource. Note that if your address is
215 * a PIO address, the conversion will fail if the physical address
216 * can't be internally converted to an IO token with
217 * pci_address_to_pio(), that is because it's either called to early
218 * or it can't be matched to any host bridge IO space
219 */
220extern int of_address_to_resource(struct device_node *dev, int index,
221 struct resource *r);
222extern int of_pci_address_to_resource(struct device_node *dev, int bar,
223 struct resource *r);
224
225extern void kdump_move_device_tree(void);
226
227#endif /* __KERNEL__ */
228#endif /* _POWERPC_PROM_H */