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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 /* 4: version, 4: total size */
26#define OF_DT_BEGIN_NODE 0x1 /* Start node: full name */
27#define OF_DT_END_NODE 0x2 /* End node */
28#define OF_DT_PROP 0x3 /* Property: name off, size, content */
29#define OF_DT_END 0x9
30
31#define OF_DT_VERSION 1
32
33/*
34 * This is what gets passed to the kernel by prom_init or kexec
35 *
36 * The dt struct contains the device tree structure, full pathes and
37 * property contents. The dt strings contain a separate block with just
38 * the strings for the property names, and is fully page aligned and
39 * self contained in a page, so that it can be kept around by the kernel,
40 * each property name appears only once in this page (cheap compression)
41 *
42 * the mem_rsvmap contains a map of reserved ranges of physical memory,
43 * passing it here instead of in the device-tree itself greatly simplifies
44 * the job of everybody. It's just a list of u64 pairs (base/size) that
45 * ends when size is 0
46 */
47struct boot_param_header
48{
49 u32 magic; /* magic word OF_DT_HEADER */
50 u32 totalsize; /* total size of DT block */
51 u32 off_dt_struct; /* offset to structure */
52 u32 off_dt_strings; /* offset to strings */
53 u32 off_mem_rsvmap; /* offset to memory reserve map */
54 u32 version; /* format version */
55 u32 last_comp_version; /* last compatible version */
56 /* version 2 fields below */
57 u32 boot_cpuid_phys; /* Which physical CPU id we're booting on */
58};
59
60
61
62typedef u32 phandle;
63typedef u32 ihandle;
64
65struct address_range {
66 unsigned long space;
67 unsigned long address;
68 unsigned long size;
69};
70
71struct interrupt_info {
72 int line;
73 int sense; /* +ve/-ve logic, edge or level, etc. */
74};
75
76struct pci_address {
77 u32 a_hi;
78 u32 a_mid;
79 u32 a_lo;
80};
81
82struct isa_address {
83 u32 a_hi;
84 u32 a_lo;
85};
86
87struct isa_range {
88 struct isa_address isa_addr;
89 struct pci_address pci_addr;
90 unsigned int size;
91};
92
93struct reg_property {
94 unsigned long address;
95 unsigned long size;
96};
97
98struct reg_property32 {
99 unsigned int address;
100 unsigned int size;
101};
102
103struct reg_property64 {
104 unsigned long address;
105 unsigned long size;
106};
107
108struct property {
109 char *name;
110 int length;
111 unsigned char *value;
112 struct property *next;
113};
114
115/* NOTE: the device_node contains PCI specific info for pci devices.
116 * This perhaps could be hung off the device_node with another struct,
117 * but for now it is directly in the node. The phb ptr is a good
118 * indication of a real PCI node. Other nodes leave these fields zeroed.
119 */
120struct pci_controller;
121struct iommu_table;
122
123struct device_node {
124 char *name;
125 char *type;
126 phandle node;
127 phandle linux_phandle;
128 int n_addrs;
129 struct address_range *addrs;
130 int n_intrs;
131 struct interrupt_info *intrs;
132 char *full_name;
133
134 /* PCI stuff probably doesn't belong here */
135 int busno; /* for pci devices */
136 int bussubno; /* for pci devices */
137 int devfn; /* for pci devices */
138 int eeh_mode; /* See eeh.h for possible EEH_MODEs */
139 int eeh_config_addr;
140 int pci_ext_config_space; /* for pci devices */
141 struct pci_controller *phb; /* for pci devices */
142 struct iommu_table *iommu_table; /* for phb's or bridges */
143
144 struct property *properties;
145 struct device_node *parent;
146 struct device_node *child;
147 struct device_node *sibling;
148 struct device_node *next; /* next device of same type */
149 struct device_node *allnext; /* next in list of all nodes */
150 struct proc_dir_entry *pde; /* this node's proc directory */
151 struct kref kref;
152 unsigned long _flags;
153};
154
155extern struct device_node *of_chosen;
156
157/* flag descriptions */
158#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
159
160#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
161#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
162
163/*
164 * Until 32-bit ppc can add proc_dir_entries to its device_node
165 * definition, we cannot refer to pde, name_link, and addr_link
166 * in arch-independent code.
167 */
168#define HAVE_ARCH_DEVTREE_FIXUPS
169
170static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
171{
172 dn->pde = de;
173}
174
175
176/* OBSOLETE: Old stlye node lookup */
177extern struct device_node *find_devices(const char *name);
178extern struct device_node *find_type_devices(const char *type);
179extern struct device_node *find_path_device(const char *path);
180extern struct device_node *find_compatible_devices(const char *type,
181 const char *compat);
182extern struct device_node *find_all_nodes(void);
183
184/* New style node lookup */
185extern struct device_node *of_find_node_by_name(struct device_node *from,
186 const char *name);
187extern struct device_node *of_find_node_by_type(struct device_node *from,
188 const char *type);
189extern struct device_node *of_find_compatible_node(struct device_node *from,
190 const char *type, const char *compat);
191extern struct device_node *of_find_node_by_path(const char *path);
192extern struct device_node *of_find_node_by_phandle(phandle handle);
193extern struct device_node *of_find_all_nodes(struct device_node *prev);
194extern struct device_node *of_get_parent(const struct device_node *node);
195extern struct device_node *of_get_next_child(const struct device_node *node,
196 struct device_node *prev);
197extern struct device_node *of_node_get(struct device_node *node);
198extern void of_node_put(struct device_node *node);
199
200/* For updating the device tree at runtime */
201extern void of_attach_node(struct device_node *);
202extern void of_detach_node(const struct device_node *);
203
204/* Other Prototypes */
205extern unsigned long prom_init(unsigned long, unsigned long, unsigned long,
206 unsigned long, unsigned long);
207extern void finish_device_tree(void);
208extern int device_is_compatible(struct device_node *device, const char *);
209extern int machine_is_compatible(const char *compat);
210extern unsigned char *get_property(struct device_node *node, const char *name,
211 int *lenp);
212extern void print_properties(struct device_node *node);
213extern int prom_n_addr_cells(struct device_node* np);
214extern int prom_n_size_cells(struct device_node* np);
215extern int prom_n_intr_cells(struct device_node* np);
216extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
217extern void prom_add_property(struct device_node* np, struct property* prop);
218
219#endif /* _PPC64_PROM_H */