1 #ifndef _POWERPC_PROM_H
2 #define _POWERPC_PROM_H
6 * Definitions for talking to the Open Firmware PROM on
7 * Power Macintosh computers.
9 * Copyright (C) 1996-2005 Paul Mackerras.
11 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
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.
18 #include <linux/types.h>
19 #include <linux/proc_fs.h>
20 #include <asm/atomic.h>
22 /* Definitions used by the flattened device tree */
23 #define OF_DT_HEADER 0xd00dfeed /* marker */
24 #define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
25 #define OF_DT_END_NODE 0x2 /* End node */
26 #define OF_DT_PROP 0x3 /* Property: name off, size,
28 #define OF_DT_NOP 0x4 /* nop */
31 #define OF_DT_VERSION 0x10
34 * This is what gets passed to the kernel by prom_init or kexec
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)
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
47 struct boot_param_header
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; /* Physical CPU id we're booting on */
58 /* version 3 fields below */
59 u32 dt_strings_size; /* size of the DT strings block */
67 struct interrupt_info {
69 int sense; /* +ve/-ve logic, edge or level, etc. */
76 struct property *next;
83 phandle linux_phandle;
85 struct interrupt_info *intrs;
88 struct property *properties;
89 struct property *deadprops; /* removed properties */
90 struct device_node *parent;
91 struct device_node *child;
92 struct device_node *sibling;
93 struct device_node *next; /* next device of same type */
94 struct device_node *allnext; /* next in list of all nodes */
95 struct proc_dir_entry *pde; /* this node's proc directory */
101 extern struct device_node *of_chosen;
103 /* flag descriptions */
104 #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
106 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
107 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
109 #define HAVE_ARCH_DEVTREE_FIXUPS
111 static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
117 /* OBSOLETE: Old style node lookup */
118 extern struct device_node *find_devices(const char *name);
119 extern struct device_node *find_type_devices(const char *type);
120 extern struct device_node *find_path_device(const char *path);
121 extern struct device_node *find_compatible_devices(const char *type,
123 extern struct device_node *find_all_nodes(void);
125 /* New style node lookup */
126 extern struct device_node *of_find_node_by_name(struct device_node *from,
128 #define for_each_node_by_name(dn, name) \
129 for (dn = of_find_node_by_name(NULL, name); dn; \
130 dn = of_find_node_by_name(dn, name))
131 extern struct device_node *of_find_node_by_type(struct device_node *from,
133 #define for_each_node_by_type(dn, type) \
134 for (dn = of_find_node_by_type(NULL, type); dn; \
135 dn = of_find_node_by_type(dn, type))
136 extern struct device_node *of_find_compatible_node(struct device_node *from,
137 const char *type, const char *compat);
138 extern struct device_node *of_find_node_by_path(const char *path);
139 extern struct device_node *of_find_node_by_phandle(phandle handle);
140 extern struct device_node *of_find_all_nodes(struct device_node *prev);
141 extern struct device_node *of_get_parent(const struct device_node *node);
142 extern struct device_node *of_get_next_child(const struct device_node *node,
143 struct device_node *prev);
144 extern struct property *of_find_property(struct device_node *np,
147 extern struct device_node *of_node_get(struct device_node *node);
148 extern void of_node_put(struct device_node *node);
150 /* For scanning the flat device-tree at boot time */
151 extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
152 const char *uname, int depth,
155 extern void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
156 unsigned long *size);
157 extern int __init of_flat_dt_is_compatible(unsigned long node, const char *name);
158 extern unsigned long __init of_get_flat_dt_root(void);
160 /* For updating the device tree at runtime */
161 extern void of_attach_node(struct device_node *);
162 extern void of_detach_node(const struct device_node *);
164 /* Other Prototypes */
165 extern void finish_device_tree(void);
166 extern void unflatten_device_tree(void);
167 extern void early_init_devtree(void *);
168 extern int device_is_compatible(struct device_node *device, const char *);
169 extern int machine_is_compatible(const char *compat);
170 extern unsigned char *get_property(struct device_node *node, const char *name,
172 extern void print_properties(struct device_node *node);
173 extern int prom_n_addr_cells(struct device_node* np);
174 extern int prom_n_size_cells(struct device_node* np);
175 extern int prom_n_intr_cells(struct device_node* np);
176 extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
177 extern int prom_add_property(struct device_node* np, struct property* prop);
178 extern int prom_remove_property(struct device_node *np, struct property *prop);
179 extern int prom_update_property(struct device_node *np,
180 struct property *newprop,
181 struct property *oldprop);
185 * PCI <-> OF matching functions
186 * (XXX should these be here?)
190 extern int pci_device_from_OF_node(struct device_node *node,
192 extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
193 extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
194 extern void pci_create_OF_bus_map(void);
197 extern struct resource *request_OF_resource(struct device_node* node,
198 int index, const char* name_postfix);
199 extern int release_OF_resource(struct device_node* node, int index);
203 * OF address retreival & translation
207 /* Translate an OF address block into a CPU physical address
209 #define OF_BAD_ADDR ((u64)-1)
210 extern u64 of_translate_address(struct device_node *np, u32 *addr);
212 /* Extract an address from a device, returns the region size and
213 * the address space flags too. The PCI version uses a BAR number
214 * instead of an absolute index
216 extern u32 *of_get_address(struct device_node *dev, int index,
217 u64 *size, unsigned int *flags);
218 extern u32 *of_get_pci_address(struct device_node *dev, int bar_no,
219 u64 *size, unsigned int *flags);
221 /* Get an address as a resource. Note that if your address is
222 * a PIO address, the conversion will fail if the physical address
223 * can't be internally converted to an IO token with
224 * pci_address_to_pio(), that is because it's either called to early
225 * or it can't be matched to any host bridge IO space
227 extern int of_address_to_resource(struct device_node *dev, int index,
229 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
232 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
235 void of_parse_dma_window(struct device_node *dn, unsigned char *dma_window_prop,
236 unsigned long *busno, unsigned long *phys, unsigned long *size);
238 extern void kdump_move_device_tree(void);
240 /* CPU OF node matching */
241 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
243 #endif /* __KERNEL__ */
244 #endif /* _POWERPC_PROM_H */