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 #define HAVE_ARCH_DEVTREE_FIXUPS
31 /* Other Prototypes */
32 extern int early_uartlite_console(void);
36 * PCI <-> OF matching functions
37 * (XXX should these be here?)
41 extern int pci_device_from_OF_node(struct device_node *node,
43 extern struct device_node *pci_busdev_to_OF_node(struct pci_bus *bus,
45 extern struct device_node *pci_device_to_OF_node(struct pci_dev *dev);
46 extern void pci_create_OF_bus_map(void);
50 * OF address retreival & translation
53 /* Translate an OF address block into a CPU physical address
55 extern u64 of_translate_address(struct device_node *np, const u32 *addr);
57 /* Extract an address from a device, returns the region size and
58 * the address space flags too. The PCI version uses a BAR number
59 * instead of an absolute index
61 extern const u32 *of_get_address(struct device_node *dev, int index,
62 u64 *size, unsigned int *flags);
63 extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
64 u64 *size, unsigned int *flags);
66 /* Get an address as a resource. Note that if your address is
67 * a PIO address, the conversion will fail if the physical address
68 * can't be internally converted to an IO token with
69 * pci_address_to_pio(), that is because it's either called to early
70 * or it can't be matched to any host bridge IO space
72 extern int of_address_to_resource(struct device_node *dev, int index,
74 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
77 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
80 void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
81 unsigned long *busno, unsigned long *phys, unsigned long *size);
83 extern void kdump_move_device_tree(void);
85 /* CPU OF node matching */
86 struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
88 /* Get the MAC address */
89 extern const void *of_get_mac_address(struct device_node *np);
92 * OF interrupt mapping
95 /* This structure is returned when an interrupt is mapped. The controller
96 * field needs to be put() after use
99 #define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
102 struct device_node *controller; /* Interrupt controller node */
103 u32 size; /* Specifier size */
104 u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
108 * of_irq_map_init - Initialize the irq remapper
109 * @flags: flags defining workarounds to enable
111 * Some machines have bugs in the device-tree which require certain workarounds
112 * to be applied. Call this before any interrupt mapping attempts to enable
115 #define OF_IMAP_OLDWORLD_MAC 0x00000001
116 #define OF_IMAP_NO_PHANDLE 0x00000002
118 extern void of_irq_map_init(unsigned int flags);
121 * of_irq_map_raw - Low level interrupt tree parsing
122 * @parent: the device interrupt parent
123 * @intspec: interrupt specifier ("interrupts" property of the device)
124 * @ointsize: size of the passed in interrupt specifier
125 * @addr: address specifier (start of "reg" property of the device)
126 * @out_irq: structure of_irq filled by this function
128 * Returns 0 on success and a negative number on error
130 * This function is a low-level interrupt tree walking function. It
131 * can be used to do a partial walk with synthetized reg and interrupts
132 * properties, for example when resolving PCI interrupts when no device
133 * node exist for the parent.
137 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
138 u32 ointsize, const u32 *addr,
139 struct of_irq *out_irq);
142 * of_irq_map_one - Resolve an interrupt for a device
143 * @device: the device whose interrupt is to be resolved
144 * @index: index of the interrupt to resolve
145 * @out_irq: structure of_irq filled by this function
147 * This function resolves an interrupt, walking the tree, for a given
148 * device-tree node. It's the high level pendant to of_irq_map_raw().
149 * It also implements the workarounds for OldWolrd Macs.
151 extern int of_irq_map_one(struct device_node *device, int index,
152 struct of_irq *out_irq);
155 * of_irq_map_pci - Resolve the interrupt for a PCI device
156 * @pdev: the device whose interrupt is to be resolved
157 * @out_irq: structure of_irq filled by this function
159 * This function resolves the PCI interrupt for a given PCI device. If a
160 * device-node exists for a given pci_dev, it will use normal OF tree
161 * walking. If not, it will implement standard swizzling and walk up the
162 * PCI tree until an device-node is found, at which point it will finish
163 * resolving using the OF tree walking.
166 extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
168 extern int of_irq_to_resource(struct device_node *dev, int index,
172 * of_iomap - Maps the memory mapped IO for a given device_node
173 * @device: the device whose io range will be mapped
174 * @index: index of the io range
176 * Returns a pointer to the mapped memory
178 extern void __iomem *of_iomap(struct device_node *device, int index);
180 #endif /* __ASSEMBLY__ */
181 #endif /* __KERNEL__ */
182 #endif /* _ASM_MICROBLAZE_PROM_H */