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Linux kernel mirror (for testing)
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1#ifndef _PPC64_PROM_H
2#define _PPC64_PROM_H
3
4/*
5 * Definitions for talking to the Open Firmware PROM on
6 * Power Macintosh computers.
7 *
8 * Copyright (C) 1996 Paul Mackerras.
9 *
10 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 */
17#include <linux/proc_fs.h>
18#include <asm/atomic.h>
19
20#define PTRRELOC(x) ((typeof(x))((unsigned long)(x) - offset))
21#define PTRUNRELOC(x) ((typeof(x))((unsigned long)(x) + offset))
22#define RELOC(x) (*PTRRELOC(&(x)))
23
24/* Definitions used by the flattened device tree */
25#define OF_DT_HEADER 0xd00dfeed /* marker */
26#define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
27#define OF_DT_END_NODE 0x2 /* End node */
28#define OF_DT_PROP 0x3 /* Property: name off, size,
29 * content */
30#define OF_DT_NOP 0x4 /* nop */
31#define OF_DT_END 0x9
32
33#define OF_DT_VERSION 0x10
34
35/*
36 * This is what gets passed to the kernel by prom_init or kexec
37 *
38 * The dt struct contains the device tree structure, full pathes and
39 * property contents. The dt strings contain a separate block with just
40 * the strings for the property names, and is fully page aligned and
41 * self contained in a page, so that it can be kept around by the kernel,
42 * each property name appears only once in this page (cheap compression)
43 *
44 * the mem_rsvmap contains a map of reserved ranges of physical memory,
45 * passing it here instead of in the device-tree itself greatly simplifies
46 * the job of everybody. It's just a list of u64 pairs (base/size) that
47 * ends when size is 0
48 */
49struct boot_param_header
50{
51 u32 magic; /* magic word OF_DT_HEADER */
52 u32 totalsize; /* total size of DT block */
53 u32 off_dt_struct; /* offset to structure */
54 u32 off_dt_strings; /* offset to strings */
55 u32 off_mem_rsvmap; /* offset to memory reserve map */
56 u32 version; /* format version */
57 u32 last_comp_version; /* last compatible version */
58 /* version 2 fields below */
59 u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
60 /* version 3 fields below */
61 u32 dt_strings_size; /* size of the DT strings block */
62};
63
64
65
66typedef u32 phandle;
67typedef u32 ihandle;
68
69struct address_range {
70 unsigned long space;
71 unsigned long address;
72 unsigned long size;
73};
74
75struct interrupt_info {
76 int line;
77 int sense; /* +ve/-ve logic, edge or level, etc. */
78};
79
80struct pci_address {
81 u32 a_hi;
82 u32 a_mid;
83 u32 a_lo;
84};
85
86struct isa_address {
87 u32 a_hi;
88 u32 a_lo;
89};
90
91struct isa_range {
92 struct isa_address isa_addr;
93 struct pci_address pci_addr;
94 unsigned int size;
95};
96
97struct reg_property {
98 unsigned long address;
99 unsigned long size;
100};
101
102struct reg_property32 {
103 unsigned int address;
104 unsigned int size;
105};
106
107struct reg_property64 {
108 unsigned long address;
109 unsigned long size;
110};
111
112struct property {
113 char *name;
114 int length;
115 unsigned char *value;
116 struct property *next;
117};
118
119struct device_node {
120 char *name;
121 char *type;
122 phandle node;
123 phandle linux_phandle;
124 int n_addrs;
125 struct address_range *addrs;
126 int n_intrs;
127 struct interrupt_info *intrs;
128 char *full_name;
129
130 struct property *properties;
131 struct device_node *parent;
132 struct device_node *child;
133 struct device_node *sibling;
134 struct device_node *next; /* next device of same type */
135 struct device_node *allnext; /* next in list of all nodes */
136 struct proc_dir_entry *pde; /* this node's proc directory */
137 struct kref kref;
138 unsigned long _flags;
139 void *data;
140};
141
142extern struct device_node *of_chosen;
143
144/* flag descriptions */
145#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
146
147#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
148#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
149
150/*
151 * Until 32-bit ppc can add proc_dir_entries to its device_node
152 * definition, we cannot refer to pde, name_link, and addr_link
153 * in arch-independent code.
154 */
155#define HAVE_ARCH_DEVTREE_FIXUPS
156
157static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
158{
159 dn->pde = de;
160}
161
162
163/* OBSOLETE: Old stlye node lookup */
164extern struct device_node *find_devices(const char *name);
165extern struct device_node *find_type_devices(const char *type);
166extern struct device_node *find_path_device(const char *path);
167extern struct device_node *find_compatible_devices(const char *type,
168 const char *compat);
169extern struct device_node *find_all_nodes(void);
170
171/* New style node lookup */
172extern struct device_node *of_find_node_by_name(struct device_node *from,
173 const char *name);
174extern struct device_node *of_find_node_by_type(struct device_node *from,
175 const char *type);
176extern struct device_node *of_find_compatible_node(struct device_node *from,
177 const char *type, const char *compat);
178extern struct device_node *of_find_node_by_path(const char *path);
179extern struct device_node *of_find_node_by_phandle(phandle handle);
180extern struct device_node *of_find_all_nodes(struct device_node *prev);
181extern struct device_node *of_get_parent(const struct device_node *node);
182extern struct device_node *of_get_next_child(const struct device_node *node,
183 struct device_node *prev);
184extern struct device_node *of_node_get(struct device_node *node);
185extern void of_node_put(struct device_node *node);
186
187/* For updating the device tree at runtime */
188extern void of_attach_node(struct device_node *);
189extern void of_detach_node(const struct device_node *);
190
191/* Other Prototypes */
192extern unsigned long prom_init(unsigned long, unsigned long, unsigned long,
193 unsigned long, unsigned long);
194extern void finish_device_tree(void);
195extern int device_is_compatible(struct device_node *device, const char *);
196extern int machine_is_compatible(const char *compat);
197extern unsigned char *get_property(struct device_node *node, const char *name,
198 int *lenp);
199extern void print_properties(struct device_node *node);
200extern int prom_n_addr_cells(struct device_node* np);
201extern int prom_n_size_cells(struct device_node* np);
202extern int prom_n_intr_cells(struct device_node* np);
203extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
204extern void prom_add_property(struct device_node* np, struct property* prop);
205
206#endif /* _PPC64_PROM_H */