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 #define LONG_LSW(X) (((unsigned long)X) & 0xffffffff)
25 #define LONG_MSW(X) (((unsigned long)X) >> 32)
27 /* Definitions used by the flattened device tree */
28 #define OF_DT_HEADER 0xd00dfeed /* 4: version, 4: total size */
29 #define OF_DT_BEGIN_NODE 0x1 /* Start node: full name */
30 #define OF_DT_END_NODE 0x2 /* End node */
31 #define OF_DT_PROP 0x3 /* Property: name off, size, content */
34 #define OF_DT_VERSION 1
37 * This is what gets passed to the kernel by prom_init or kexec
39 * The dt struct contains the device tree structure, full pathes and
40 * property contents. The dt strings contain a separate block with just
41 * the strings for the property names, and is fully page aligned and
42 * self contained in a page, so that it can be kept around by the kernel,
43 * each property name appears only once in this page (cheap compression)
45 * the mem_rsvmap contains a map of reserved ranges of physical memory,
46 * passing it here instead of in the device-tree itself greatly simplifies
47 * the job of everybody. It's just a list of u64 pairs (base/size) that
50 struct boot_param_header
52 u32 magic; /* magic word OF_DT_HEADER */
53 u32 totalsize; /* total size of DT block */
54 u32 off_dt_struct; /* offset to structure */
55 u32 off_dt_strings; /* offset to strings */
56 u32 off_mem_rsvmap; /* offset to memory reserve map */
57 u32 version; /* format version */
58 u32 last_comp_version; /* last compatible version */
59 /* version 2 fields below */
60 u32 boot_cpuid_phys; /* Which physical CPU id we're booting on */
67 typedef u32 phandle32;
68 typedef u32 ihandle32;
70 struct address_range {
72 unsigned long address;
76 struct interrupt_info {
78 int sense; /* +ve/-ve logic, edge or level, etc. */
93 struct isa_address isa_addr;
94 struct pci_address pci_addr;
103 extern struct of_tce_table of_tce_table[];
105 struct reg_property {
106 unsigned long address;
110 struct reg_property32 {
111 unsigned int address;
115 struct reg_property64 {
116 unsigned long address;
120 struct reg_property_pmac {
121 unsigned int address_hi;
122 unsigned int address_lo;
126 struct translation_property {
136 unsigned char *value;
137 struct property *next;
140 /* NOTE: the device_node contains PCI specific info for pci devices.
141 * This perhaps could be hung off the device_node with another struct,
142 * but for now it is directly in the node. The phb ptr is a good
143 * indication of a real PCI node. Other nodes leave these fields zeroed.
145 struct pci_controller;
152 phandle linux_phandle;
154 struct address_range *addrs;
156 struct interrupt_info *intrs;
159 /* PCI stuff probably doesn't belong here */
160 int busno; /* for pci devices */
161 int bussubno; /* for pci devices */
162 int devfn; /* for pci devices */
163 #define DN_STATUS_BIST_FAILED (1<<0)
164 int status; /* Current device status (non-zero is bad) */
165 int eeh_mode; /* See eeh.h for possible EEH_MODEs */
167 struct pci_controller *phb; /* for pci devices */
168 struct iommu_table *iommu_table; /* for phb's or bridges */
170 struct property *properties;
171 struct device_node *parent;
172 struct device_node *child;
173 struct device_node *sibling;
174 struct device_node *next; /* next device of same type */
175 struct device_node *allnext; /* next in list of all nodes */
176 struct proc_dir_entry *pde; /* this node's proc directory */
177 struct proc_dir_entry *name_link; /* name symlink */
178 struct proc_dir_entry *addr_link; /* addr symlink */
179 atomic_t _users; /* reference count */
180 unsigned long _flags;
183 extern struct device_node *of_chosen;
185 /* flag descriptions */
186 #define OF_STALE 0 /* node is slated for deletion */
187 #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
189 #define OF_IS_STALE(x) test_bit(OF_STALE, &x->_flags)
190 #define OF_MARK_STALE(x) set_bit(OF_STALE, &x->_flags)
191 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
192 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
195 * Until 32-bit ppc can add proc_dir_entries to its device_node
196 * definition, we cannot refer to pde, name_link, and addr_link
197 * in arch-independent code.
199 #define HAVE_ARCH_DEVTREE_FIXUPS
201 static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
206 static void inline set_node_name_link(struct device_node *dn, struct proc_dir_entry *de)
211 static void inline set_node_addr_link(struct device_node *dn, struct proc_dir_entry *de)
216 /* OBSOLETE: Old stlye node lookup */
217 extern struct device_node *find_devices(const char *name);
218 extern struct device_node *find_type_devices(const char *type);
219 extern struct device_node *find_path_device(const char *path);
220 extern struct device_node *find_compatible_devices(const char *type,
222 extern struct device_node *find_all_nodes(void);
224 /* New style node lookup */
225 extern struct device_node *of_find_node_by_name(struct device_node *from,
227 extern struct device_node *of_find_node_by_type(struct device_node *from,
229 extern struct device_node *of_find_compatible_node(struct device_node *from,
230 const char *type, const char *compat);
231 extern struct device_node *of_find_node_by_path(const char *path);
232 extern struct device_node *of_find_node_by_phandle(phandle handle);
233 extern struct device_node *of_find_all_nodes(struct device_node *prev);
234 extern struct device_node *of_get_parent(const struct device_node *node);
235 extern struct device_node *of_get_next_child(const struct device_node *node,
236 struct device_node *prev);
237 extern struct device_node *of_node_get(struct device_node *node);
238 extern void of_node_put(struct device_node *node);
240 /* For updating the device tree at runtime */
241 extern int of_add_node(const char *path, struct property *proplist);
242 extern int of_remove_node(struct device_node *np);
244 /* Other Prototypes */
245 extern unsigned long prom_init(unsigned long, unsigned long, unsigned long,
246 unsigned long, unsigned long);
247 extern void relocate_nodes(void);
248 extern void finish_device_tree(void);
249 extern int device_is_compatible(struct device_node *device, const char *);
250 extern int machine_is_compatible(const char *compat);
251 extern unsigned char *get_property(struct device_node *node, const char *name,
253 extern void print_properties(struct device_node *node);
254 extern int prom_n_addr_cells(struct device_node* np);
255 extern int prom_n_size_cells(struct device_node* np);
256 extern int prom_n_intr_cells(struct device_node* np);
257 extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
258 extern void prom_add_property(struct device_node* np, struct property* prop);
260 #endif /* _PPC64_PROM_H */