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 <linux/platform_device.h>
22 #include <asm/atomic.h>
24 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
25 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
27 /* Definitions used by the flattened device tree */
28 #define OF_DT_HEADER 0xd00dfeed /* marker */
29 #define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
30 #define OF_DT_END_NODE 0x2 /* End node */
31 #define OF_DT_PROP 0x3 /* Property: name off, size,
33 #define OF_DT_NOP 0x4 /* nop */
36 #define OF_DT_VERSION 0x10
39 * This is what gets passed to the kernel by prom_init or kexec
41 * The dt struct contains the device tree structure, full pathes and
42 * property contents. The dt strings contain a separate block with just
43 * the strings for the property names, and is fully page aligned and
44 * self contained in a page, so that it can be kept around by the kernel,
45 * each property name appears only once in this page (cheap compression)
47 * the mem_rsvmap contains a map of reserved ranges of physical memory,
48 * passing it here instead of in the device-tree itself greatly simplifies
49 * the job of everybody. It's just a list of u64 pairs (base/size) that
52 struct boot_param_header
54 u32 magic; /* magic word OF_DT_HEADER */
55 u32 totalsize; /* total size of DT block */
56 u32 off_dt_struct; /* offset to structure */
57 u32 off_dt_strings; /* offset to strings */
58 u32 off_mem_rsvmap; /* offset to memory reserve map */
59 u32 version; /* format version */
60 u32 last_comp_version; /* last compatible version */
61 /* version 2 fields below */
62 u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
63 /* version 3 fields below */
64 u32 dt_strings_size; /* size of the DT strings block */
65 /* version 17 fields below */
66 u32 dt_struct_size; /* size of the DT structure block */
78 struct property *next;
85 phandle linux_phandle;
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 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
105 return test_bit(flag, &n->_flags);
108 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
110 set_bit(flag, &n->_flags);
114 #define HAVE_ARCH_DEVTREE_FIXUPS
116 static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
122 extern struct device_node *of_find_all_nodes(struct device_node *prev);
123 extern struct device_node *of_node_get(struct device_node *node);
124 extern void of_node_put(struct device_node *node);
126 /* For scanning the flat device-tree at boot time */
127 extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
128 const char *uname, int depth,
131 extern void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
132 unsigned long *size);
133 extern int __init of_flat_dt_is_compatible(unsigned long node, const char *name);
134 extern unsigned long __init of_get_flat_dt_root(void);
136 /* For updating the device tree at runtime */
137 extern void of_attach_node(struct device_node *);
138 extern void of_detach_node(const struct device_node *);
140 /* Other Prototypes */
141 extern void finish_device_tree(void);
142 extern void unflatten_device_tree(void);
143 extern void early_init_devtree(void *);
144 #define device_is_compatible(d, c) of_device_is_compatible((d), (c))
145 extern int machine_is_compatible(const char *compat);
146 extern void print_properties(struct device_node *node);
147 extern int prom_n_intr_cells(struct device_node* np);
148 extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
149 extern int prom_add_property(struct device_node* np, struct property* prop);
150 extern int prom_remove_property(struct device_node *np, struct property *prop);
151 extern int prom_update_property(struct device_node *np,
152 struct property *newprop,
153 struct property *oldprop);
157 * PCI <-> OF matching functions
158 * (XXX should these be here?)
162 extern int pci_device_from_OF_node(struct device_node *node,
164 extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
165 extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
166 extern void pci_create_OF_bus_map(void);
169 extern struct resource *request_OF_resource(struct device_node* node,
170 int index, const char* name_postfix);
171 extern int release_OF_resource(struct device_node* node, int index);
175 * OF address retreival & translation
179 /* Helper to read a big number; size is in cells (not bytes) */
180 static inline u64 of_read_number(const u32 *cell, int size)
184 r = (r << 32) | *(cell++);
188 /* Like of_read_number, but we want an unsigned long result */
190 static inline unsigned long of_read_ulong(const u32 *cell, int size)
195 #define of_read_ulong(cell, size) of_read_number(cell, size)
198 /* Translate an OF address block into a CPU physical address
200 extern u64 of_translate_address(struct device_node *np, const u32 *addr);
202 /* Extract an address from a device, returns the region size and
203 * the address space flags too. The PCI version uses a BAR number
204 * instead of an absolute index
206 extern const u32 *of_get_address(struct device_node *dev, int index,
207 u64 *size, unsigned int *flags);
208 extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
209 u64 *size, unsigned int *flags);
211 /* Get an address as a resource. Note that if your address is
212 * a PIO address, the conversion will fail if the physical address
213 * can't be internally converted to an IO token with
214 * pci_address_to_pio(), that is because it's either called to early
215 * or it can't be matched to any host bridge IO space
217 extern int of_address_to_resource(struct device_node *dev, int index,
219 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
222 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
225 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
226 unsigned long *busno, unsigned long *phys, unsigned long *size);
228 extern void kdump_move_device_tree(void);
230 /* CPU OF node matching */
231 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
233 /* Get the MAC address */
234 extern const void *of_get_mac_address(struct device_node *np);
237 * OF interrupt mapping
240 /* This structure is returned when an interrupt is mapped. The controller
241 * field needs to be put() after use
244 #define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
247 struct device_node *controller; /* Interrupt controller node */
248 u32 size; /* Specifier size */
249 u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
253 * of_irq_map_init - Initialize the irq remapper
254 * @flags: flags defining workarounds to enable
256 * Some machines have bugs in the device-tree which require certain workarounds
257 * to be applied. Call this before any interrupt mapping attempts to enable
260 #define OF_IMAP_OLDWORLD_MAC 0x00000001
261 #define OF_IMAP_NO_PHANDLE 0x00000002
263 extern void of_irq_map_init(unsigned int flags);
266 * of_irq_map_raw - Low level interrupt tree parsing
267 * @parent: the device interrupt parent
268 * @intspec: interrupt specifier ("interrupts" property of the device)
269 * @ointsize: size of the passed in interrupt specifier
270 * @addr: address specifier (start of "reg" property of the device)
271 * @out_irq: structure of_irq filled by this function
273 * Returns 0 on success and a negative number on error
275 * This function is a low-level interrupt tree walking function. It
276 * can be used to do a partial walk with synthetized reg and interrupts
277 * properties, for example when resolving PCI interrupts when no device
278 * node exist for the parent.
282 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
283 u32 ointsize, const u32 *addr,
284 struct of_irq *out_irq);
288 * of_irq_map_one - Resolve an interrupt for a device
289 * @device: the device whose interrupt is to be resolved
290 * @index: index of the interrupt to resolve
291 * @out_irq: structure of_irq filled by this function
293 * This function resolves an interrupt, walking the tree, for a given
294 * device-tree node. It's the high level pendant to of_irq_map_raw().
295 * It also implements the workarounds for OldWolrd Macs.
297 extern int of_irq_map_one(struct device_node *device, int index,
298 struct of_irq *out_irq);
301 * of_irq_map_pci - Resolve the interrupt for a PCI device
302 * @pdev: the device whose interrupt is to be resolved
303 * @out_irq: structure of_irq filled by this function
305 * This function resolves the PCI interrupt for a given PCI device. If a
306 * device-node exists for a given pci_dev, it will use normal OF tree
307 * walking. If not, it will implement standard swizzling and walk up the
308 * PCI tree until an device-node is found, at which point it will finish
309 * resolving using the OF tree walking.
312 extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
314 extern int of_irq_to_resource(struct device_node *dev, int index,
318 * of_iomap - Maps the memory mapped IO for a given device_node
319 * @device: the device whose io range will be mapped
320 * @index: index of the io range
322 * Returns a pointer to the mapped memory
324 extern void __iomem *of_iomap(struct device_node *device, int index);
327 * NB: This is here while we transition from using asm/prom.h
330 #include <linux/of.h>
332 #endif /* __KERNEL__ */
333 #endif /* _POWERPC_PROM_H */