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 *);
43 * PCI <-> OF matching functions
44 * (XXX should these be here?)
48 extern int pci_device_from_OF_node(struct device_node *node,
50 extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
51 extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
52 extern void pci_create_OF_bus_map(void);
55 extern struct resource *request_OF_resource(struct device_node* node,
56 int index, const char* name_postfix);
57 extern int release_OF_resource(struct device_node* node, int index);
61 * OF address retreival & translation
64 /* Translate an OF address block into a CPU physical address
66 extern u64 of_translate_address(struct device_node *np, const u32 *addr);
68 /* Translate a DMA address from device space to CPU space */
69 extern u64 of_translate_dma_address(struct device_node *dev,
72 /* Extract an address from a device, returns the region size and
73 * the address space flags too. The PCI version uses a BAR number
74 * instead of an absolute index
76 extern const u32 *of_get_address(struct device_node *dev, int index,
77 u64 *size, unsigned int *flags);
79 extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
80 u64 *size, unsigned int *flags);
82 static inline const u32 *of_get_pci_address(struct device_node *dev,
83 int bar_no, u64 *size, unsigned int *flags)
87 #endif /* CONFIG_PCI */
89 /* Get an address as a resource. Note that if your address is
90 * a PIO address, the conversion will fail if the physical address
91 * can't be internally converted to an IO token with
92 * pci_address_to_pio(), that is because it's either called to early
93 * or it can't be matched to any host bridge IO space
95 extern int of_address_to_resource(struct device_node *dev, int index,
98 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
101 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
106 #endif /* CONFIG_PCI */
108 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
111 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
112 unsigned long *busno, unsigned long *phys, unsigned long *size);
114 extern void kdump_move_device_tree(void);
116 /* CPU OF node matching */
117 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
120 struct device_node *of_find_next_cache_node(struct device_node *np);
122 /* Get the MAC address */
123 extern const void *of_get_mac_address(struct device_node *np);
126 * OF interrupt mapping
129 /* This structure is returned when an interrupt is mapped. The controller
130 * field needs to be put() after use
133 #define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
136 struct device_node *controller; /* Interrupt controller node */
137 u32 size; /* Specifier size */
138 u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
142 * of_irq_map_init - Initialize the irq remapper
143 * @flags: flags defining workarounds to enable
145 * Some machines have bugs in the device-tree which require certain workarounds
146 * to be applied. Call this before any interrupt mapping attempts to enable
149 #define OF_IMAP_OLDWORLD_MAC 0x00000001
150 #define OF_IMAP_NO_PHANDLE 0x00000002
152 extern void of_irq_map_init(unsigned int flags);
155 * of_irq_map_raw - Low level interrupt tree parsing
156 * @parent: the device interrupt parent
157 * @intspec: interrupt specifier ("interrupts" property of the device)
158 * @ointsize: size of the passed in interrupt specifier
159 * @addr: address specifier (start of "reg" property of the device)
160 * @out_irq: structure of_irq filled by this function
162 * Returns 0 on success and a negative number on error
164 * This function is a low-level interrupt tree walking function. It
165 * can be used to do a partial walk with synthetized reg and interrupts
166 * properties, for example when resolving PCI interrupts when no device
167 * node exist for the parent.
171 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
172 u32 ointsize, const u32 *addr,
173 struct of_irq *out_irq);
177 * of_irq_map_one - Resolve an interrupt for a device
178 * @device: the device whose interrupt is to be resolved
179 * @index: index of the interrupt to resolve
180 * @out_irq: structure of_irq filled by this function
182 * This function resolves an interrupt, walking the tree, for a given
183 * device-tree node. It's the high level pendant to of_irq_map_raw().
184 * It also implements the workarounds for OldWolrd Macs.
186 extern int of_irq_map_one(struct device_node *device, int index,
187 struct of_irq *out_irq);
190 * of_irq_map_pci - Resolve the interrupt for a PCI device
191 * @pdev: the device whose interrupt is to be resolved
192 * @out_irq: structure of_irq filled by this function
194 * This function resolves the PCI interrupt for a given PCI device. If a
195 * device-node exists for a given pci_dev, it will use normal OF tree
196 * walking. If not, it will implement standard swizzling and walk up the
197 * PCI tree until an device-node is found, at which point it will finish
198 * resolving using the OF tree walking.
201 extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
203 extern int of_irq_to_resource(struct device_node *dev, int index,
207 * of_iomap - Maps the memory mapped IO for a given device_node
208 * @device: the device whose io range will be mapped
209 * @index: index of the io range
211 * Returns a pointer to the mapped memory
213 extern void __iomem *of_iomap(struct device_node *device, int index);
215 #endif /* __KERNEL__ */
216 #endif /* _POWERPC_PROM_H */