1 #include <linux/of.h> /* linux/of.h gets to determine #include ordering */
2 #ifndef _POWERPC_PROM_H
3 #define _POWERPC_PROM_H
7 * Definitions for talking to the Open Firmware PROM on
8 * Power Macintosh computers.
10 * Copyright (C) 1996-2005 Paul Mackerras.
12 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version
17 * 2 of the License, or (at your option) any later version.
19 #include <linux/types.h>
20 #include <linux/proc_fs.h>
21 #include <linux/platform_device.h>
23 #include <asm/atomic.h>
25 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
26 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
28 #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
29 #define of_prop_cmp(s1, s2) strcmp((s1), (s2))
30 #define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
32 /* Definitions used by the flattened device tree */
33 #define OF_DT_HEADER 0xd00dfeed /* marker */
34 #define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
35 #define OF_DT_END_NODE 0x2 /* End node */
36 #define OF_DT_PROP 0x3 /* Property: name off, size,
38 #define OF_DT_NOP 0x4 /* nop */
41 #define OF_DT_VERSION 0x10
44 * This is what gets passed to the kernel by prom_init or kexec
46 * The dt struct contains the device tree structure, full pathes and
47 * property contents. The dt strings contain a separate block with just
48 * the strings for the property names, and is fully page aligned and
49 * self contained in a page, so that it can be kept around by the kernel,
50 * each property name appears only once in this page (cheap compression)
52 * the mem_rsvmap contains a map of reserved ranges of physical memory,
53 * passing it here instead of in the device-tree itself greatly simplifies
54 * the job of everybody. It's just a list of u64 pairs (base/size) that
57 struct boot_param_header
59 u32 magic
; /* magic word OF_DT_HEADER */
60 u32 totalsize
; /* total size of DT block */
61 u32 off_dt_struct
; /* offset to structure */
62 u32 off_dt_strings
; /* offset to strings */
63 u32 off_mem_rsvmap
; /* offset to memory reserve map */
64 u32 version
; /* format version */
65 u32 last_comp_version
; /* last compatible version */
66 /* version 2 fields below */
67 u32 boot_cpuid_phys
; /* Physical CPU id we're booting on */
68 /* version 3 fields below */
69 u32 dt_strings_size
; /* size of the DT strings block */
70 /* version 17 fields below */
71 u32 dt_struct_size
; /* size of the DT structure block */
83 struct property
*next
;
90 phandle linux_phandle
;
93 struct property
*properties
;
94 struct property
*deadprops
; /* removed properties */
95 struct device_node
*parent
;
96 struct device_node
*child
;
97 struct device_node
*sibling
;
98 struct device_node
*next
; /* next device of same type */
99 struct device_node
*allnext
; /* next in list of all nodes */
100 struct proc_dir_entry
*pde
; /* this node's proc directory */
102 unsigned long _flags
;
106 extern struct device_node
*of_chosen
;
108 static inline int of_node_check_flag(struct device_node
*n
, unsigned long flag
)
110 return test_bit(flag
, &n
->_flags
);
113 static inline void of_node_set_flag(struct device_node
*n
, unsigned long flag
)
115 set_bit(flag
, &n
->_flags
);
119 #define HAVE_ARCH_DEVTREE_FIXUPS
121 static inline void set_node_proc_entry(struct device_node
*dn
, struct proc_dir_entry
*de
)
127 extern struct device_node
*of_find_all_nodes(struct device_node
*prev
);
128 extern struct device_node
*of_node_get(struct device_node
*node
);
129 extern void of_node_put(struct device_node
*node
);
131 /* For scanning the flat device-tree at boot time */
132 extern int __init
of_scan_flat_dt(int (*it
)(unsigned long node
,
133 const char *uname
, int depth
,
136 extern void* __init
of_get_flat_dt_prop(unsigned long node
, const char *name
,
137 unsigned long *size
);
138 extern int __init
of_flat_dt_is_compatible(unsigned long node
, const char *name
);
139 extern unsigned long __init
of_get_flat_dt_root(void);
141 /* For updating the device tree at runtime */
142 extern void of_attach_node(struct device_node
*);
143 extern void of_detach_node(struct device_node
*);
145 /* Other Prototypes */
146 extern void finish_device_tree(void);
147 extern void unflatten_device_tree(void);
148 extern void early_init_devtree(void *);
149 extern int machine_is_compatible(const char *compat
);
150 extern void print_properties(struct device_node
*node
);
151 extern int prom_n_intr_cells(struct device_node
* np
);
152 extern void prom_get_irq_senses(unsigned char *senses
, int off
, int max
);
153 extern int prom_add_property(struct device_node
* np
, struct property
* prop
);
154 extern int prom_remove_property(struct device_node
*np
, struct property
*prop
);
155 extern int prom_update_property(struct device_node
*np
,
156 struct property
*newprop
,
157 struct property
*oldprop
);
161 * PCI <-> OF matching functions
162 * (XXX should these be here?)
166 extern int pci_device_from_OF_node(struct device_node
*node
,
168 extern struct device_node
* pci_busdev_to_OF_node(struct pci_bus
*, int);
169 extern struct device_node
* pci_device_to_OF_node(struct pci_dev
*);
170 extern void pci_create_OF_bus_map(void);
173 extern struct resource
*request_OF_resource(struct device_node
* node
,
174 int index
, const char* name_postfix
);
175 extern int release_OF_resource(struct device_node
* node
, int index
);
179 * OF address retreival & translation
183 /* Helper to read a big number; size is in cells (not bytes) */
184 static inline u64
of_read_number(const u32
*cell
, int size
)
188 r
= (r
<< 32) | *(cell
++);
192 /* Like of_read_number, but we want an unsigned long result */
194 static inline unsigned long of_read_ulong(const u32
*cell
, int size
)
199 #define of_read_ulong(cell, size) of_read_number(cell, size)
202 /* Translate an OF address block into a CPU physical address
204 extern u64
of_translate_address(struct device_node
*np
, const u32
*addr
);
206 /* Translate a DMA address from device space to CPU space */
207 extern u64
of_translate_dma_address(struct device_node
*dev
,
210 /* Extract an address from a device, returns the region size and
211 * the address space flags too. The PCI version uses a BAR number
212 * instead of an absolute index
214 extern const u32
*of_get_address(struct device_node
*dev
, int index
,
215 u64
*size
, unsigned int *flags
);
217 extern const u32
*of_get_pci_address(struct device_node
*dev
, int bar_no
,
218 u64
*size
, unsigned int *flags
);
220 static inline const u32
*of_get_pci_address(struct device_node
*dev
,
221 int bar_no
, u64
*size
, unsigned int *flags
)
225 #endif /* CONFIG_PCI */
227 /* Get an address as a resource. Note that if your address is
228 * a PIO address, the conversion will fail if the physical address
229 * can't be internally converted to an IO token with
230 * pci_address_to_pio(), that is because it's either called to early
231 * or it can't be matched to any host bridge IO space
233 extern int of_address_to_resource(struct device_node
*dev
, int index
,
236 extern int of_pci_address_to_resource(struct device_node
*dev
, int bar
,
239 static inline int of_pci_address_to_resource(struct device_node
*dev
, int bar
,
244 #endif /* CONFIG_PCI */
246 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
249 void of_parse_dma_window(struct device_node
*dn
, const void *dma_window_prop
,
250 unsigned long *busno
, unsigned long *phys
, unsigned long *size
);
252 extern void kdump_move_device_tree(void);
254 /* CPU OF node matching */
255 struct device_node
*of_get_cpu_node(int cpu
, unsigned int *thread
);
258 struct device_node
*of_find_next_cache_node(struct device_node
*np
);
260 /* Get the MAC address */
261 extern const void *of_get_mac_address(struct device_node
*np
);
264 * OF interrupt mapping
267 /* This structure is returned when an interrupt is mapped. The controller
268 * field needs to be put() after use
271 #define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
274 struct device_node
*controller
; /* Interrupt controller node */
275 u32 size
; /* Specifier size */
276 u32 specifier
[OF_MAX_IRQ_SPEC
]; /* Specifier copy */
280 * of_irq_map_init - Initialize the irq remapper
281 * @flags: flags defining workarounds to enable
283 * Some machines have bugs in the device-tree which require certain workarounds
284 * to be applied. Call this before any interrupt mapping attempts to enable
287 #define OF_IMAP_OLDWORLD_MAC 0x00000001
288 #define OF_IMAP_NO_PHANDLE 0x00000002
290 extern void of_irq_map_init(unsigned int flags
);
293 * of_irq_map_raw - Low level interrupt tree parsing
294 * @parent: the device interrupt parent
295 * @intspec: interrupt specifier ("interrupts" property of the device)
296 * @ointsize: size of the passed in interrupt specifier
297 * @addr: address specifier (start of "reg" property of the device)
298 * @out_irq: structure of_irq filled by this function
300 * Returns 0 on success and a negative number on error
302 * This function is a low-level interrupt tree walking function. It
303 * can be used to do a partial walk with synthetized reg and interrupts
304 * properties, for example when resolving PCI interrupts when no device
305 * node exist for the parent.
309 extern int of_irq_map_raw(struct device_node
*parent
, const u32
*intspec
,
310 u32 ointsize
, const u32
*addr
,
311 struct of_irq
*out_irq
);
315 * of_irq_map_one - Resolve an interrupt for a device
316 * @device: the device whose interrupt is to be resolved
317 * @index: index of the interrupt to resolve
318 * @out_irq: structure of_irq filled by this function
320 * This function resolves an interrupt, walking the tree, for a given
321 * device-tree node. It's the high level pendant to of_irq_map_raw().
322 * It also implements the workarounds for OldWolrd Macs.
324 extern int of_irq_map_one(struct device_node
*device
, int index
,
325 struct of_irq
*out_irq
);
328 * of_irq_map_pci - Resolve the interrupt for a PCI device
329 * @pdev: the device whose interrupt is to be resolved
330 * @out_irq: structure of_irq filled by this function
332 * This function resolves the PCI interrupt for a given PCI device. If a
333 * device-node exists for a given pci_dev, it will use normal OF tree
334 * walking. If not, it will implement standard swizzling and walk up the
335 * PCI tree until an device-node is found, at which point it will finish
336 * resolving using the OF tree walking.
339 extern int of_irq_map_pci(struct pci_dev
*pdev
, struct of_irq
*out_irq
);
341 extern int of_irq_to_resource(struct device_node
*dev
, int index
,
345 * of_iomap - Maps the memory mapped IO for a given device_node
346 * @device: the device whose io range will be mapped
347 * @index: index of the io range
349 * Returns a pointer to the mapped memory
351 extern void __iomem
*of_iomap(struct device_node
*device
, int index
);
353 #endif /* __KERNEL__ */
354 #endif /* _POWERPC_PROM_H */