1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
#include <linux/of.h> /* linux/of.h gets to determine #include ordering */
#ifndef _POWERPC_PROM_H
#define _POWERPC_PROM_H
#ifdef __KERNEL__
/*
* Definitions for talking to the Open Firmware PROM on
* Power Macintosh computers.
*
* Copyright (C) 1996-2005 Paul Mackerras.
*
* Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/types.h>
#include <linux/of_fdt.h>
#include <linux/proc_fs.h>
#include <linux/platform_device.h>
#include <asm/irq.h>
#include <asm/atomic.h>
#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
#define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
#define of_prop_cmp(s1, s2) strcmp((s1), (s2))
#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
extern struct device_node *of_chosen;
#define HAVE_ARCH_DEVTREE_FIXUPS
/* For updating the device tree at runtime */
extern void of_attach_node(struct device_node *);
extern void of_detach_node(struct device_node *);
#ifdef CONFIG_PPC32
/*
* PCI <-> OF matching functions
* (XXX should these be here?)
*/
struct pci_bus;
struct pci_dev;
extern int pci_device_from_OF_node(struct device_node *node,
u8* bus, u8* devfn);
extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
extern void pci_create_OF_bus_map(void);
#endif
extern struct resource *request_OF_resource(struct device_node* node,
int index, const char* name_postfix);
extern int release_OF_resource(struct device_node* node, int index);
/*
* OF address retreival & translation
*/
/* Translate an OF address block into a CPU physical address
*/
extern u64 of_translate_address(struct device_node *np, const u32 *addr);
/* Translate a DMA address from device space to CPU space */
extern u64 of_translate_dma_address(struct device_node *dev,
const u32 *in_addr);
/* Extract an address from a device, returns the region size and
* the address space flags too. The PCI version uses a BAR number
* instead of an absolute index
*/
extern const u32 *of_get_address(struct device_node *dev, int index,
u64 *size, unsigned int *flags);
#ifdef CONFIG_PCI
extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
u64 *size, unsigned int *flags);
#else
static inline const u32 *of_get_pci_address(struct device_node *dev,
int bar_no, u64 *size, unsigned int *flags)
{
return NULL;
}
#endif /* CONFIG_PCI */
/* Get an address as a resource. Note that if your address is
* a PIO address, the conversion will fail if the physical address
* can't be internally converted to an IO token with
* pci_address_to_pio(), that is because it's either called to early
* or it can't be matched to any host bridge IO space
*/
extern int of_address_to_resource(struct device_node *dev, int index,
struct resource *r);
#ifdef CONFIG_PCI
extern int of_pci_address_to_resource(struct device_node *dev, int bar,
struct resource *r);
#else
static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
struct resource *r)
{
return -ENOSYS;
}
#endif /* CONFIG_PCI */
/* Parse the ibm,dma-window property of an OF node into the busno, phys and
* size parameters.
*/
void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
unsigned long *busno, unsigned long *phys, unsigned long *size);
extern void kdump_move_device_tree(void);
/* CPU OF node matching */
struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
/* cache lookup */
struct device_node *of_find_next_cache_node(struct device_node *np);
/* Get the MAC address */
extern const void *of_get_mac_address(struct device_node *np);
/*
* OF interrupt mapping
*/
/* This structure is returned when an interrupt is mapped. The controller
* field needs to be put() after use
*/
#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
struct of_irq {
struct device_node *controller; /* Interrupt controller node */
u32 size; /* Specifier size */
u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
};
/**
* of_irq_map_init - Initialize the irq remapper
* @flags: flags defining workarounds to enable
*
* Some machines have bugs in the device-tree which require certain workarounds
* to be applied. Call this before any interrupt mapping attempts to enable
* those workarounds.
*/
#define OF_IMAP_OLDWORLD_MAC 0x00000001
#define OF_IMAP_NO_PHANDLE 0x00000002
extern void of_irq_map_init(unsigned int flags);
/**
* of_irq_map_raw - Low level interrupt tree parsing
* @parent: the device interrupt parent
* @intspec: interrupt specifier ("interrupts" property of the device)
* @ointsize: size of the passed in interrupt specifier
* @addr: address specifier (start of "reg" property of the device)
* @out_irq: structure of_irq filled by this function
*
* Returns 0 on success and a negative number on error
*
* This function is a low-level interrupt tree walking function. It
* can be used to do a partial walk with synthetized reg and interrupts
* properties, for example when resolving PCI interrupts when no device
* node exist for the parent.
*
*/
extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
u32 ointsize, const u32 *addr,
struct of_irq *out_irq);
/**
* of_irq_map_one - Resolve an interrupt for a device
* @device: the device whose interrupt is to be resolved
* @index: index of the interrupt to resolve
* @out_irq: structure of_irq filled by this function
*
* This function resolves an interrupt, walking the tree, for a given
* device-tree node. It's the high level pendant to of_irq_map_raw().
* It also implements the workarounds for OldWolrd Macs.
*/
extern int of_irq_map_one(struct device_node *device, int index,
struct of_irq *out_irq);
/**
* of_irq_map_pci - Resolve the interrupt for a PCI device
* @pdev: the device whose interrupt is to be resolved
* @out_irq: structure of_irq filled by this function
*
* This function resolves the PCI interrupt for a given PCI device. If a
* device-node exists for a given pci_dev, it will use normal OF tree
* walking. If not, it will implement standard swizzling and walk up the
* PCI tree until an device-node is found, at which point it will finish
* resolving using the OF tree walking.
*/
struct pci_dev;
extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
extern int of_irq_to_resource(struct device_node *dev, int index,
struct resource *r);
/**
* of_iomap - Maps the memory mapped IO for a given device_node
* @device: the device whose io range will be mapped
* @index: index of the io range
*
* Returns a pointer to the mapped memory
*/
extern void __iomem *of_iomap(struct device_node *device, int index);
#endif /* __KERNEL__ */
#endif /* _POWERPC_PROM_H */
|
