summaryrefslogtreecommitdiffstats
path: root/include/asm-ppc/prom.h
blob: eb317a0806e4b713112ced1db1a5592411798ca1 (plain)
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
/*
 * Definitions for talking to the Open Firmware PROM on
 * Power Macintosh computers.
 *
 * Copyright (C) 1996 Paul Mackerras.
 */
#ifdef __KERNEL__
#ifndef _PPC_PROM_H
#define _PPC_PROM_H

#include <linux/config.h>
#include <linux/types.h>

typedef u32 phandle;
typedef u32 ihandle;

struct address_range {
	unsigned int space;
	unsigned int address;
	unsigned int size;
};

struct interrupt_info {
	int	line;
	int	sense;		/* +ve/-ve logic, edge or level, etc. */
};

struct reg_property {
	unsigned int address;
	unsigned int size;
};

struct property {
	char	*name;
	int	length;
	unsigned char *value;
	struct property *next;
};

/*
 * Note: don't change this structure for now or you'll break BootX !
 */
struct device_node {
	char	*name;
	char	*type;
	phandle	node;
	int	n_addrs;
	struct	address_range *addrs;
	int	n_intrs;
	struct	interrupt_info *intrs;
	char	*full_name;
	struct	property *properties;
	struct	device_node *parent;
	struct	device_node *child;
	struct	device_node *sibling;
	struct	device_node *next;	/* next device of same type */
	struct	device_node *allnext;	/* next in list of all nodes */
};

struct prom_args;
typedef void (*prom_entry)(struct prom_args *);

/* OBSOLETE: Old style node lookup */
extern struct device_node *find_devices(const char *name);
extern struct device_node *find_type_devices(const char *type);
extern struct device_node *find_path_device(const char *path);
extern struct device_node *find_compatible_devices(const char *type,
						   const char *compat);
extern struct device_node *find_all_nodes(void);

/* New style node lookup */
extern struct device_node *of_find_node_by_name(struct device_node *from,
	const char *name);
extern struct device_node *of_find_node_by_type(struct device_node *from,
	const char *type);
extern struct device_node *of_find_compatible_node(struct device_node *from,
	const char *type, const char *compat);
extern struct device_node *of_find_node_by_path(const char *path);
extern struct device_node *of_find_all_nodes(struct device_node *prev);
extern struct device_node *of_get_parent(const struct device_node *node);
extern struct device_node *of_get_next_child(const struct device_node *node,
					     struct device_node *prev);
extern struct device_node *of_node_get(struct device_node *node);
extern void of_node_put(struct device_node *node);

/* Other Prototypes */
extern void abort(void);
extern unsigned long prom_init(int, int, prom_entry);
extern void prom_print(const char *msg);
extern void relocate_nodes(void);
extern void finish_device_tree(void);
extern int device_is_compatible(struct device_node *device, const char *);
extern int machine_is_compatible(const char *compat);
extern unsigned char *get_property(struct device_node *node, const char *name,
				   int *lenp);
extern int prom_add_property(struct device_node* np, struct property* prop);
extern void prom_get_irq_senses(unsigned char *, int, int);
extern int prom_n_addr_cells(struct device_node* np);
extern int prom_n_size_cells(struct device_node* np);

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);

extern void print_properties(struct device_node *node);
extern int call_rtas(const char *service, int nargs, int nret,
		     unsigned long *outputs, ...);

/*
 * PCI <-> OF matching functions
 */
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);

/*
 * When we call back to the Open Firmware client interface, we usually
 * have to do that before the kernel is relocated to its final location
 * (this is because we can't use OF after we have overwritten the
 * exception vectors with our exception handlers).  These macros assist
 * in performing the address calculations that we need to do to access
 * data when the kernel is running at an address that is different from
 * the address that the kernel is linked at.  The reloc_offset() function
 * returns the difference between these two addresses and the macros
 * simplify the process of adding or subtracting this offset to/from
 * pointer values.  See arch/ppc/kernel/prom.c for how these are used.
 */
extern unsigned long reloc_offset(void);
extern unsigned long add_reloc_offset(unsigned long);
extern unsigned long sub_reloc_offset(unsigned long);

#define PTRRELOC(x)	((typeof(x))add_reloc_offset((unsigned long)(x)))
#define PTRUNRELOC(x)	((typeof(x))sub_reloc_offset((unsigned long)(x)))


/*
 * OF address retreival & translation
 */


/* Translate an OF address block into a CPU physical address
 */
#define OF_BAD_ADDR	((u64)-1)
extern u64 of_translate_address(struct device_node *np, u32 *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 u32 *of_get_address(struct device_node *dev, int index,
			   u64 *size, unsigned int *flags);
extern u32 *of_get_pci_address(struct device_node *dev, int bar_no,
			       u64 *size, unsigned int *flags);

/* 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);
extern int of_pci_address_to_resource(struct device_node *dev, int bar,
				      struct resource *r);


#endif /* _PPC_PROM_H */
#endif /* __KERNEL__ */
OpenPOWER on IntegriCloud