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/of_fdt.h>
21 #include <linux/proc_fs.h>
22 #include <linux/platform_device.h>
24 #include <asm/atomic.h>
26 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
27 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
29 #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
30 #define of_prop_cmp(s1, s2) strcmp((s1), (s2))
31 #define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
33 extern struct device_node *of_chosen;
35 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
37 return test_bit(flag, &n->_flags);
40 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
42 set_bit(flag, &n->_flags);
46 #define HAVE_ARCH_DEVTREE_FIXUPS
48 static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
54 extern struct device_node *of_find_all_nodes(struct device_node *prev);
55 extern struct device_node *of_node_get(struct device_node *node);
56 extern void of_node_put(struct device_node *node);
58 /* For scanning the flat device-tree at boot time */
59 extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
60 const char *uname, int depth,
63 extern void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
65 extern int __init of_flat_dt_is_compatible(unsigned long node, const char *name);
66 extern unsigned long __init of_get_flat_dt_root(void);
68 /* For updating the device tree at runtime */
69 extern void of_attach_node(struct device_node *);
70 extern void of_detach_node(struct device_node *);
72 /* Other Prototypes */
73 extern void finish_device_tree(void);
74 extern void unflatten_device_tree(void);
75 extern void early_init_devtree(void *);
76 extern int machine_is_compatible(const char *compat);
77 extern void print_properties(struct device_node *node);
78 extern int prom_n_intr_cells(struct device_node* np);
79 extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
80 extern int prom_add_property(struct device_node* np, struct property* prop);
81 extern int prom_remove_property(struct device_node *np, struct property *prop);
82 extern int prom_update_property(struct device_node *np,
83 struct property *newprop,
84 struct property *oldprop);
88 * PCI <-> OF matching functions
89 * (XXX should these be here?)
93 extern int pci_device_from_OF_node(struct device_node *node,
95 extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
96 extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
97 extern void pci_create_OF_bus_map(void);
100 extern struct resource *request_OF_resource(struct device_node* node,
101 int index, const char* name_postfix);
102 extern int release_OF_resource(struct device_node* node, int index);
106 * OF address retreival & translation
110 /* Helper to read a big number; size is in cells (not bytes) */
111 static inline u64 of_read_number(const u32 *cell, int size)
115 r = (r << 32) | *(cell++);
119 /* Like of_read_number, but we want an unsigned long result */
121 static inline unsigned long of_read_ulong(const u32 *cell, int size)
126 #define of_read_ulong(cell, size) of_read_number(cell, size)
129 /* Translate an OF address block into a CPU physical address
131 extern u64 of_translate_address(struct device_node *np, const u32 *addr);
133 /* Translate a DMA address from device space to CPU space */
134 extern u64 of_translate_dma_address(struct device_node *dev,
137 /* Extract an address from a device, returns the region size and
138 * the address space flags too. The PCI version uses a BAR number
139 * instead of an absolute index
141 extern const u32 *of_get_address(struct device_node *dev, int index,
142 u64 *size, unsigned int *flags);
144 extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
145 u64 *size, unsigned int *flags);
147 static inline const u32 *of_get_pci_address(struct device_node *dev,
148 int bar_no, u64 *size, unsigned int *flags)
152 #endif /* CONFIG_PCI */
154 /* Get an address as a resource. Note that if your address is
155 * a PIO address, the conversion will fail if the physical address
156 * can't be internally converted to an IO token with
157 * pci_address_to_pio(), that is because it's either called to early
158 * or it can't be matched to any host bridge IO space
160 extern int of_address_to_resource(struct device_node *dev, int index,
163 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
166 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
171 #endif /* CONFIG_PCI */
173 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
176 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
177 unsigned long *busno, unsigned long *phys, unsigned long *size);
179 extern void kdump_move_device_tree(void);
181 /* CPU OF node matching */
182 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
185 struct device_node *of_find_next_cache_node(struct device_node *np);
187 /* Get the MAC address */
188 extern const void *of_get_mac_address(struct device_node *np);
191 * OF interrupt mapping
194 /* This structure is returned when an interrupt is mapped. The controller
195 * field needs to be put() after use
198 #define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
201 struct device_node *controller; /* Interrupt controller node */
202 u32 size; /* Specifier size */
203 u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
207 * of_irq_map_init - Initialize the irq remapper
208 * @flags: flags defining workarounds to enable
210 * Some machines have bugs in the device-tree which require certain workarounds
211 * to be applied. Call this before any interrupt mapping attempts to enable
214 #define OF_IMAP_OLDWORLD_MAC 0x00000001
215 #define OF_IMAP_NO_PHANDLE 0x00000002
217 extern void of_irq_map_init(unsigned int flags);
220 * of_irq_map_raw - Low level interrupt tree parsing
221 * @parent: the device interrupt parent
222 * @intspec: interrupt specifier ("interrupts" property of the device)
223 * @ointsize: size of the passed in interrupt specifier
224 * @addr: address specifier (start of "reg" property of the device)
225 * @out_irq: structure of_irq filled by this function
227 * Returns 0 on success and a negative number on error
229 * This function is a low-level interrupt tree walking function. It
230 * can be used to do a partial walk with synthetized reg and interrupts
231 * properties, for example when resolving PCI interrupts when no device
232 * node exist for the parent.
236 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
237 u32 ointsize, const u32 *addr,
238 struct of_irq *out_irq);
242 * of_irq_map_one - Resolve an interrupt for a device
243 * @device: the device whose interrupt is to be resolved
244 * @index: index of the interrupt to resolve
245 * @out_irq: structure of_irq filled by this function
247 * This function resolves an interrupt, walking the tree, for a given
248 * device-tree node. It's the high level pendant to of_irq_map_raw().
249 * It also implements the workarounds for OldWolrd Macs.
251 extern int of_irq_map_one(struct device_node *device, int index,
252 struct of_irq *out_irq);
255 * of_irq_map_pci - Resolve the interrupt for a PCI device
256 * @pdev: the device whose interrupt is to be resolved
257 * @out_irq: structure of_irq filled by this function
259 * This function resolves the PCI interrupt for a given PCI device. If a
260 * device-node exists for a given pci_dev, it will use normal OF tree
261 * walking. If not, it will implement standard swizzling and walk up the
262 * PCI tree until an device-node is found, at which point it will finish
263 * resolving using the OF tree walking.
266 extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
268 extern int of_irq_to_resource(struct device_node *dev, int index,
272 * of_iomap - Maps the memory mapped IO for a given device_node
273 * @device: the device whose io range will be mapped
274 * @index: index of the io range
276 * Returns a pointer to the mapped memory
278 extern void __iomem *of_iomap(struct device_node *device, int index);
280 #endif /* __KERNEL__ */
281 #endif /* _POWERPC_PROM_H */