5 * Definitions for talking to the Open Firmware PROM on
6 * Power Macintosh computers.
8 * Copyright (C) 1996 Paul Mackerras.
10 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
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.
17 #include <linux/proc_fs.h>
18 #include <asm/atomic.h>
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)))
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,
30 #define OF_DT_NOP 0x4 /* nop */
33 #define OF_DT_VERSION 0x10
36 * This is what gets passed to the kernel by prom_init or kexec
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)
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
49 struct boot_param_header
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 */
69 struct address_range
{
71 unsigned long address
;
75 struct interrupt_info
{
77 int sense
; /* +ve/-ve logic, edge or level, etc. */
92 struct isa_address isa_addr
;
93 struct pci_address pci_addr
;
98 unsigned long address
;
102 struct reg_property32
{
103 unsigned int address
;
107 struct reg_property64
{
108 unsigned long address
;
115 unsigned char *value
;
116 struct property
*next
;
119 /* NOTE: the device_node contains PCI specific info for pci devices.
120 * This perhaps could be hung off the device_node with another struct,
121 * but for now it is directly in the node. The phb ptr is a good
122 * indication of a real PCI node. Other nodes leave these fields zeroed.
124 struct pci_controller
;
131 phandle linux_phandle
;
133 struct address_range
*addrs
;
135 struct interrupt_info
*intrs
;
138 /* PCI stuff probably doesn't belong here */
139 int busno
; /* for pci devices */
140 int bussubno
; /* for pci devices */
141 int devfn
; /* for pci devices */
142 int eeh_mode
; /* See eeh.h for possible EEH_MODEs */
144 int pci_ext_config_space
; /* for pci devices */
145 struct pci_controller
*phb
; /* for pci devices */
146 struct iommu_table
*iommu_table
; /* for phb's or bridges */
148 struct property
*properties
;
149 struct device_node
*parent
;
150 struct device_node
*child
;
151 struct device_node
*sibling
;
152 struct device_node
*next
; /* next device of same type */
153 struct device_node
*allnext
; /* next in list of all nodes */
154 struct proc_dir_entry
*pde
; /* this node's proc directory */
156 unsigned long _flags
;
159 extern struct device_node
*of_chosen
;
161 /* flag descriptions */
162 #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
164 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
165 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
168 * Until 32-bit ppc can add proc_dir_entries to its device_node
169 * definition, we cannot refer to pde, name_link, and addr_link
170 * in arch-independent code.
172 #define HAVE_ARCH_DEVTREE_FIXUPS
174 static inline void set_node_proc_entry(struct device_node
*dn
, struct proc_dir_entry
*de
)
180 /* OBSOLETE: Old stlye node lookup */
181 extern struct device_node
*find_devices(const char *name
);
182 extern struct device_node
*find_type_devices(const char *type
);
183 extern struct device_node
*find_path_device(const char *path
);
184 extern struct device_node
*find_compatible_devices(const char *type
,
186 extern struct device_node
*find_all_nodes(void);
188 /* New style node lookup */
189 extern struct device_node
*of_find_node_by_name(struct device_node
*from
,
191 extern struct device_node
*of_find_node_by_type(struct device_node
*from
,
193 extern struct device_node
*of_find_compatible_node(struct device_node
*from
,
194 const char *type
, const char *compat
);
195 extern struct device_node
*of_find_node_by_path(const char *path
);
196 extern struct device_node
*of_find_node_by_phandle(phandle handle
);
197 extern struct device_node
*of_find_all_nodes(struct device_node
*prev
);
198 extern struct device_node
*of_get_parent(const struct device_node
*node
);
199 extern struct device_node
*of_get_next_child(const struct device_node
*node
,
200 struct device_node
*prev
);
201 extern struct device_node
*of_node_get(struct device_node
*node
);
202 extern void of_node_put(struct device_node
*node
);
204 /* For updating the device tree at runtime */
205 extern void of_attach_node(struct device_node
*);
206 extern void of_detach_node(const struct device_node
*);
208 /* Other Prototypes */
209 extern unsigned long prom_init(unsigned long, unsigned long, unsigned long,
210 unsigned long, unsigned long);
211 extern void finish_device_tree(void);
212 extern int device_is_compatible(struct device_node
*device
, const char *);
213 extern int machine_is_compatible(const char *compat
);
214 extern unsigned char *get_property(struct device_node
*node
, const char *name
,
216 extern void print_properties(struct device_node
*node
);
217 extern int prom_n_addr_cells(struct device_node
* np
);
218 extern int prom_n_size_cells(struct device_node
* np
);
219 extern int prom_n_intr_cells(struct device_node
* np
);
220 extern void prom_get_irq_senses(unsigned char *senses
, int off
, int max
);
221 extern void prom_add_property(struct device_node
* np
, struct property
* prop
);
223 #endif /* _PPC64_PROM_H */
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