tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Definitions for talking to the Open Firmware PROM on
3 * Power Macintosh computers.
4 *
5 * Copyright (C) 1996-2005 Paul Mackerras.
6 *
7 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
8 *
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.
13 */
14
15#include <linux/of.h> /* linux/of.h gets to determine #include ordering */
16
17#ifndef _ASM_MICROBLAZE_PROM_H
18#define _ASM_MICROBLAZE_PROM_H
19#ifdef __KERNEL__
20#ifndef __ASSEMBLY__
21
22#include <linux/types.h>
23#include <linux/of_fdt.h>
24#include <linux/proc_fs.h>
25#include <linux/platform_device.h>
26#include <asm/irq.h>
27#include <asm/atomic.h>
28
29#define HAVE_ARCH_DEVTREE_FIXUPS
30
31/* Other Prototypes */
32extern int early_uartlite_console(void);
33
34#ifdef CONFIG_PCI
35/*
36 * PCI <-> OF matching functions
37 * (XXX should these be here?)
38 */
39struct pci_bus;
40struct pci_dev;
41extern int pci_device_from_OF_node(struct device_node *node,
42 u8 *bus, u8 *devfn);
43extern struct device_node *pci_busdev_to_OF_node(struct pci_bus *bus,
44 int devfn);
45extern struct device_node *pci_device_to_OF_node(struct pci_dev *dev);
46extern void pci_create_OF_bus_map(void);
47#endif
48
49/*
50 * OF address retreival & translation
51 */
52
53/* Translate an OF address block into a CPU physical address
54 */
55extern u64 of_translate_address(struct device_node *np, const u32 *addr);
56
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
60 */
61extern const u32 *of_get_address(struct device_node *dev, int index,
62 u64 *size, unsigned int *flags);
63extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
64 u64 *size, unsigned int *flags);
65
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
71 */
72extern int of_address_to_resource(struct device_node *dev, int index,
73 struct resource *r);
74extern int of_pci_address_to_resource(struct device_node *dev, int bar,
75 struct resource *r);
76
77/* Parse the ibm,dma-window property of an OF node into the busno, phys and
78 * size parameters.
79 */
80void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
81 unsigned long *busno, unsigned long *phys, unsigned long *size);
82
83extern void kdump_move_device_tree(void);
84
85/* CPU OF node matching */
86struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
87
88/* Get the MAC address */
89extern const void *of_get_mac_address(struct device_node *np);
90
91/*
92 * OF interrupt mapping
93 */
94
95/* This structure is returned when an interrupt is mapped. The controller
96 * field needs to be put() after use
97 */
98
99#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
100
101struct of_irq {
102 struct device_node *controller; /* Interrupt controller node */
103 u32 size; /* Specifier size */
104 u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
105};
106
107/**
108 * of_irq_map_init - Initialize the irq remapper
109 * @flags: flags defining workarounds to enable
110 *
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
113 * those workarounds.
114 */
115#define OF_IMAP_OLDWORLD_MAC 0x00000001
116#define OF_IMAP_NO_PHANDLE 0x00000002
117
118extern void of_irq_map_init(unsigned int flags);
119
120/**
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
127 *
128 * Returns 0 on success and a negative number on error
129 *
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.
134 *
135 */
136
137extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
138 u32 ointsize, const u32 *addr,
139 struct of_irq *out_irq);
140
141/**
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
146 *
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.
150 */
151extern int of_irq_map_one(struct device_node *device, int index,
152 struct of_irq *out_irq);
153
154/**
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
158 *
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.
164 */
165struct pci_dev;
166extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
167
168extern int of_irq_to_resource(struct device_node *dev, int index,
169 struct resource *r);
170
171/**
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
175 *
176 * Returns a pointer to the mapped memory
177 */
178extern void __iomem *of_iomap(struct device_node *device, int index);
179
180#endif /* __ASSEMBLY__ */
181#endif /* __KERNEL__ */
182#endif /* _ASM_MICROBLAZE_PROM_H */