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 #define HAVE_ARCH_DEVTREE_FIXUPS
37 /* For updating the device tree at runtime */
38 extern void of_attach_node(struct device_node *);
39 extern void of_detach_node(struct device_node *);
41 /* Other Prototypes */
42 extern void finish_device_tree(void);
43 extern void unflatten_device_tree(void);
44 extern void early_init_devtree(void *);
45 extern int machine_is_compatible(const char *compat);
46 extern void print_properties(struct device_node *node);
47 extern int prom_n_intr_cells(struct device_node* np);
48 extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
49 extern int prom_add_property(struct device_node* np, struct property* prop);
50 extern int prom_remove_property(struct device_node *np, struct property *prop);
51 extern int prom_update_property(struct device_node *np,
52 struct property *newprop,
53 struct property *oldprop);
57 * PCI <-> OF matching functions
58 * (XXX should these be here?)
62 extern int pci_device_from_OF_node(struct device_node *node,
64 extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
65 extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
66 extern void pci_create_OF_bus_map(void);
69 extern struct resource *request_OF_resource(struct device_node* node,
70 int index, const char* name_postfix);
71 extern int release_OF_resource(struct device_node* node, int index);
75 * OF address retreival & translation
78 /* Translate an OF address block into a CPU physical address
80 extern u64 of_translate_address(struct device_node *np, const u32 *addr);
82 /* Translate a DMA address from device space to CPU space */
83 extern u64 of_translate_dma_address(struct device_node *dev,
86 /* Extract an address from a device, returns the region size and
87 * the address space flags too. The PCI version uses a BAR number
88 * instead of an absolute index
90 extern const u32 *of_get_address(struct device_node *dev, int index,
91 u64 *size, unsigned int *flags);
93 extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
94 u64 *size, unsigned int *flags);
96 static inline const u32 *of_get_pci_address(struct device_node *dev,
97 int bar_no, u64 *size, unsigned int *flags)
101 #endif /* CONFIG_PCI */
103 /* Get an address as a resource. Note that if your address is
104 * a PIO address, the conversion will fail if the physical address
105 * can't be internally converted to an IO token with
106 * pci_address_to_pio(), that is because it's either called to early
107 * or it can't be matched to any host bridge IO space
109 extern int of_address_to_resource(struct device_node *dev, int index,
112 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
115 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
120 #endif /* CONFIG_PCI */
122 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
125 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
126 unsigned long *busno, unsigned long *phys, unsigned long *size);
128 extern void kdump_move_device_tree(void);
130 /* CPU OF node matching */
131 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
134 struct device_node *of_find_next_cache_node(struct device_node *np);
136 /* Get the MAC address */
137 extern const void *of_get_mac_address(struct device_node *np);
140 * OF interrupt mapping
143 /* This structure is returned when an interrupt is mapped. The controller
144 * field needs to be put() after use
147 #define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
150 struct device_node *controller; /* Interrupt controller node */
151 u32 size; /* Specifier size */
152 u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
156 * of_irq_map_init - Initialize the irq remapper
157 * @flags: flags defining workarounds to enable
159 * Some machines have bugs in the device-tree which require certain workarounds
160 * to be applied. Call this before any interrupt mapping attempts to enable
163 #define OF_IMAP_OLDWORLD_MAC 0x00000001
164 #define OF_IMAP_NO_PHANDLE 0x00000002
166 extern void of_irq_map_init(unsigned int flags);
169 * of_irq_map_raw - Low level interrupt tree parsing
170 * @parent: the device interrupt parent
171 * @intspec: interrupt specifier ("interrupts" property of the device)
172 * @ointsize: size of the passed in interrupt specifier
173 * @addr: address specifier (start of "reg" property of the device)
174 * @out_irq: structure of_irq filled by this function
176 * Returns 0 on success and a negative number on error
178 * This function is a low-level interrupt tree walking function. It
179 * can be used to do a partial walk with synthetized reg and interrupts
180 * properties, for example when resolving PCI interrupts when no device
181 * node exist for the parent.
185 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
186 u32 ointsize, const u32 *addr,
187 struct of_irq *out_irq);
191 * of_irq_map_one - Resolve an interrupt for a device
192 * @device: the device whose interrupt is to be resolved
193 * @index: index of the interrupt to resolve
194 * @out_irq: structure of_irq filled by this function
196 * This function resolves an interrupt, walking the tree, for a given
197 * device-tree node. It's the high level pendant to of_irq_map_raw().
198 * It also implements the workarounds for OldWolrd Macs.
200 extern int of_irq_map_one(struct device_node *device, int index,
201 struct of_irq *out_irq);
204 * of_irq_map_pci - Resolve the interrupt for a PCI device
205 * @pdev: the device whose interrupt is to be resolved
206 * @out_irq: structure of_irq filled by this function
208 * This function resolves the PCI interrupt for a given PCI device. If a
209 * device-node exists for a given pci_dev, it will use normal OF tree
210 * walking. If not, it will implement standard swizzling and walk up the
211 * PCI tree until an device-node is found, at which point it will finish
212 * resolving using the OF tree walking.
215 extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
217 extern int of_irq_to_resource(struct device_node *dev, int index,
221 * of_iomap - Maps the memory mapped IO for a given device_node
222 * @device: the device whose io range will be mapped
223 * @index: index of the io range
225 * Returns a pointer to the mapped memory
227 extern void __iomem *of_iomap(struct device_node *device, int index);
229 #endif /* __KERNEL__ */
230 #endif /* _POWERPC_PROM_H */