2 * Definitions for talking to the Open Firmware PROM on
3 * Power Macintosh computers.
5 * Copyright (C) 1996-2005 Paul Mackerras.
7 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
15 #include <linux/of.h> /* linux/of.h gets to determine #include ordering */
17 #ifndef _ASM_MICROBLAZE_PROM_H
18 #define _ASM_MICROBLAZE_PROM_H
22 #include <linux/types.h>
23 #include <linux/of_fdt.h>
24 #include <linux/proc_fs.h>
25 #include <linux/platform_device.h>
27 #include <asm/atomic.h>
29 extern struct device_node *of_chosen;
31 #define HAVE_ARCH_DEVTREE_FIXUPS
33 /* Other Prototypes */
34 extern int early_uartlite_console(void);
36 extern struct resource *request_OF_resource(struct device_node *node,
37 int index, const char *name_postfix);
38 extern int release_OF_resource(struct device_node *node, int index);
41 * OF address retreival & translation
44 /* Translate an OF address block into a CPU physical address
46 extern u64 of_translate_address(struct device_node *np, const u32 *addr);
48 /* Extract an address from a device, returns the region size and
49 * the address space flags too. The PCI version uses a BAR number
50 * instead of an absolute index
52 extern const u32 *of_get_address(struct device_node *dev, int index,
53 u64 *size, unsigned int *flags);
54 extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
55 u64 *size, unsigned int *flags);
57 /* Get an address as a resource. Note that if your address is
58 * a PIO address, the conversion will fail if the physical address
59 * can't be internally converted to an IO token with
60 * pci_address_to_pio(), that is because it's either called to early
61 * or it can't be matched to any host bridge IO space
63 extern int of_address_to_resource(struct device_node *dev, int index,
65 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
68 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
71 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
72 unsigned long *busno, unsigned long *phys, unsigned long *size);
74 extern void kdump_move_device_tree(void);
76 /* CPU OF node matching */
77 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
79 /* Get the MAC address */
80 extern const void *of_get_mac_address(struct device_node *np);
83 * OF interrupt mapping
86 /* This structure is returned when an interrupt is mapped. The controller
87 * field needs to be put() after use
90 #define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
93 struct device_node *controller; /* Interrupt controller node */
94 u32 size; /* Specifier size */
95 u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
99 * of_irq_map_init - Initialize the irq remapper
100 * @flags: flags defining workarounds to enable
102 * Some machines have bugs in the device-tree which require certain workarounds
103 * to be applied. Call this before any interrupt mapping attempts to enable
106 #define OF_IMAP_OLDWORLD_MAC 0x00000001
107 #define OF_IMAP_NO_PHANDLE 0x00000002
109 extern void of_irq_map_init(unsigned int flags);
112 * of_irq_map_raw - Low level interrupt tree parsing
113 * @parent: the device interrupt parent
114 * @intspec: interrupt specifier ("interrupts" property of the device)
115 * @ointsize: size of the passed in interrupt specifier
116 * @addr: address specifier (start of "reg" property of the device)
117 * @out_irq: structure of_irq filled by this function
119 * Returns 0 on success and a negative number on error
121 * This function is a low-level interrupt tree walking function. It
122 * can be used to do a partial walk with synthetized reg and interrupts
123 * properties, for example when resolving PCI interrupts when no device
124 * node exist for the parent.
128 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
129 u32 ointsize, const u32 *addr,
130 struct of_irq *out_irq);
133 * of_irq_map_one - Resolve an interrupt for a device
134 * @device: the device whose interrupt is to be resolved
135 * @index: index of the interrupt to resolve
136 * @out_irq: structure of_irq filled by this function
138 * This function resolves an interrupt, walking the tree, for a given
139 * device-tree node. It's the high level pendant to of_irq_map_raw().
140 * It also implements the workarounds for OldWolrd Macs.
142 extern int of_irq_map_one(struct device_node *device, int index,
143 struct of_irq *out_irq);
146 * of_irq_map_pci - Resolve the interrupt for a PCI device
147 * @pdev: the device whose interrupt is to be resolved
148 * @out_irq: structure of_irq filled by this function
150 * This function resolves the PCI interrupt for a given PCI device. If a
151 * device-node exists for a given pci_dev, it will use normal OF tree
152 * walking. If not, it will implement standard swizzling and walk up the
153 * PCI tree until an device-node is found, at which point it will finish
154 * resolving using the OF tree walking.
157 extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
159 extern int of_irq_to_resource(struct device_node *dev, int index,
163 * of_iomap - Maps the memory mapped IO for a given device_node
164 * @device: the device whose io range will be mapped
165 * @index: index of the io range
167 * Returns a pointer to the mapped memory
169 extern void __iomem *of_iomap(struct device_node *device, int index);
171 #endif /* __ASSEMBLY__ */
172 #endif /* __KERNEL__ */
173 #endif /* _ASM_MICROBLAZE_PROM_H */