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/*
1
/*
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 * ioport.h	Definitions of routines for detecting, reserving and
2
 * ioport.h	Definitions of routines for detecting, reserving and
3
 *		allocating system resources.
3
 *		allocating system resources.
4
 *
4
 *
5
 * Authors:	Linus Torvalds
5
 * Authors:	Linus Torvalds
6
 */
6
 */
7
 
7
 
8
#ifndef _LINUX_IOPORT_H
8
#ifndef _LINUX_IOPORT_H
9
#define _LINUX_IOPORT_H
9
#define _LINUX_IOPORT_H
10
 
10
 
11
#ifndef __ASSEMBLY__
11
#ifndef __ASSEMBLY__
12
#include 
12
#include 
13
#include 
13
#include 
14
/*
14
/*
15
 * Resources are tree-like, allowing
15
 * Resources are tree-like, allowing
16
 * nesting etc..
16
 * nesting etc..
17
 */
17
 */
18
struct resource {
18
struct resource {
19
	resource_size_t start;
19
	resource_size_t start;
20
	resource_size_t end;
20
	resource_size_t end;
21
	const char *name;
21
	const char *name;
22
	unsigned long flags;
22
	unsigned long flags;
23
	struct resource *parent, *sibling, *child;
23
	struct resource *parent, *sibling, *child;
24
};
24
};
25
 
-
 
26
struct resource_list {
-
 
27
	struct resource_list *next;
-
 
28
	struct resource *res;
-
 
29
	struct pci_dev *dev;
-
 
30
};
-
 
31
 
25
 
32
/*
26
/*
33
 * IO resources have these defined flags.
27
 * IO resources have these defined flags.
34
 */
28
 */
35
#define IORESOURCE_BITS		0x000000ff	/* Bus-specific bits */
29
#define IORESOURCE_BITS		0x000000ff	/* Bus-specific bits */
36
 
30
 
37
#define IORESOURCE_TYPE_BITS	0x00001f00	/* Resource type */
31
#define IORESOURCE_TYPE_BITS	0x00001f00	/* Resource type */
38
#define IORESOURCE_IO		0x00000100	/* PCI/ISA I/O ports */
32
#define IORESOURCE_IO		0x00000100	/* PCI/ISA I/O ports */
39
#define IORESOURCE_MEM		0x00000200
33
#define IORESOURCE_MEM		0x00000200
40
#define IORESOURCE_REG		0x00000300	/* Register offsets */
34
#define IORESOURCE_REG		0x00000300	/* Register offsets */
41
#define IORESOURCE_IRQ		0x00000400
35
#define IORESOURCE_IRQ		0x00000400
42
#define IORESOURCE_DMA		0x00000800
36
#define IORESOURCE_DMA		0x00000800
43
#define IORESOURCE_BUS		0x00001000
37
#define IORESOURCE_BUS		0x00001000
44
 
38
 
45
#define IORESOURCE_PREFETCH	0x00002000	/* No side effects */
39
#define IORESOURCE_PREFETCH	0x00002000	/* No side effects */
46
#define IORESOURCE_READONLY	0x00004000
40
#define IORESOURCE_READONLY	0x00004000
47
#define IORESOURCE_CACHEABLE	0x00008000
41
#define IORESOURCE_CACHEABLE	0x00008000
48
#define IORESOURCE_RANGELENGTH	0x00010000
42
#define IORESOURCE_RANGELENGTH	0x00010000
49
#define IORESOURCE_SHADOWABLE	0x00020000
43
#define IORESOURCE_SHADOWABLE	0x00020000
50
 
44
 
51
#define IORESOURCE_SIZEALIGN	0x00040000	/* size indicates alignment */
45
#define IORESOURCE_SIZEALIGN	0x00040000	/* size indicates alignment */
52
#define IORESOURCE_STARTALIGN	0x00080000	/* start field is alignment */
46
#define IORESOURCE_STARTALIGN	0x00080000	/* start field is alignment */
53
 
47
 
54
#define IORESOURCE_MEM_64	0x00100000
48
#define IORESOURCE_MEM_64	0x00100000
55
#define IORESOURCE_WINDOW	0x00200000	/* forwarded by bridge */
49
#define IORESOURCE_WINDOW	0x00200000	/* forwarded by bridge */
56
#define IORESOURCE_MUXED	0x00400000	/* Resource is software muxed */
50
#define IORESOURCE_MUXED	0x00400000	/* Resource is software muxed */
57
 
51
 
58
#define IORESOURCE_EXCLUSIVE	0x08000000	/* Userland may not map this resource */
52
#define IORESOURCE_EXCLUSIVE	0x08000000	/* Userland may not map this resource */
59
#define IORESOURCE_DISABLED	0x10000000
53
#define IORESOURCE_DISABLED	0x10000000
60
#define IORESOURCE_UNSET	0x20000000	/* No address assigned yet */
54
#define IORESOURCE_UNSET	0x20000000	/* No address assigned yet */
61
#define IORESOURCE_AUTO		0x40000000
55
#define IORESOURCE_AUTO		0x40000000
62
#define IORESOURCE_BUSY		0x80000000	/* Driver has marked this resource busy */
56
#define IORESOURCE_BUSY		0x80000000	/* Driver has marked this resource busy */
63
 
57
 
64
/* PnP IRQ specific bits (IORESOURCE_BITS) */
58
/* PnP IRQ specific bits (IORESOURCE_BITS) */
65
#define IORESOURCE_IRQ_HIGHEDGE		(1<<0)
59
#define IORESOURCE_IRQ_HIGHEDGE		(1<<0)
66
#define IORESOURCE_IRQ_LOWEDGE		(1<<1)
60
#define IORESOURCE_IRQ_LOWEDGE		(1<<1)
67
#define IORESOURCE_IRQ_HIGHLEVEL	(1<<2)
61
#define IORESOURCE_IRQ_HIGHLEVEL	(1<<2)
68
#define IORESOURCE_IRQ_LOWLEVEL		(1<<3)
62
#define IORESOURCE_IRQ_LOWLEVEL		(1<<3)
69
#define IORESOURCE_IRQ_SHAREABLE	(1<<4)
63
#define IORESOURCE_IRQ_SHAREABLE	(1<<4)
70
#define IORESOURCE_IRQ_OPTIONAL 	(1<<5)
64
#define IORESOURCE_IRQ_OPTIONAL 	(1<<5)
71
 
65
 
72
/* PnP DMA specific bits (IORESOURCE_BITS) */
66
/* PnP DMA specific bits (IORESOURCE_BITS) */
73
#define IORESOURCE_DMA_TYPE_MASK	(3<<0)
67
#define IORESOURCE_DMA_TYPE_MASK	(3<<0)
74
#define IORESOURCE_DMA_8BIT		(0<<0)
68
#define IORESOURCE_DMA_8BIT		(0<<0)
75
#define IORESOURCE_DMA_8AND16BIT	(1<<0)
69
#define IORESOURCE_DMA_8AND16BIT	(1<<0)
76
#define IORESOURCE_DMA_16BIT		(2<<0)
70
#define IORESOURCE_DMA_16BIT		(2<<0)
77
 
71
 
78
#define IORESOURCE_DMA_MASTER		(1<<2)
72
#define IORESOURCE_DMA_MASTER		(1<<2)
79
#define IORESOURCE_DMA_BYTE		(1<<3)
73
#define IORESOURCE_DMA_BYTE		(1<<3)
80
#define IORESOURCE_DMA_WORD		(1<<4)
74
#define IORESOURCE_DMA_WORD		(1<<4)
81
 
75
 
82
#define IORESOURCE_DMA_SPEED_MASK	(3<<6)
76
#define IORESOURCE_DMA_SPEED_MASK	(3<<6)
83
#define IORESOURCE_DMA_COMPATIBLE	(0<<6)
77
#define IORESOURCE_DMA_COMPATIBLE	(0<<6)
84
#define IORESOURCE_DMA_TYPEA		(1<<6)
78
#define IORESOURCE_DMA_TYPEA		(1<<6)
85
#define IORESOURCE_DMA_TYPEB		(2<<6)
79
#define IORESOURCE_DMA_TYPEB		(2<<6)
86
#define IORESOURCE_DMA_TYPEF		(3<<6)
80
#define IORESOURCE_DMA_TYPEF		(3<<6)
87
 
81
 
88
/* PnP memory I/O specific bits (IORESOURCE_BITS) */
82
/* PnP memory I/O specific bits (IORESOURCE_BITS) */
89
#define IORESOURCE_MEM_WRITEABLE	(1<<0)	/* dup: IORESOURCE_READONLY */
83
#define IORESOURCE_MEM_WRITEABLE	(1<<0)	/* dup: IORESOURCE_READONLY */
90
#define IORESOURCE_MEM_CACHEABLE	(1<<1)	/* dup: IORESOURCE_CACHEABLE */
84
#define IORESOURCE_MEM_CACHEABLE	(1<<1)	/* dup: IORESOURCE_CACHEABLE */
91
#define IORESOURCE_MEM_RANGELENGTH	(1<<2)	/* dup: IORESOURCE_RANGELENGTH */
85
#define IORESOURCE_MEM_RANGELENGTH	(1<<2)	/* dup: IORESOURCE_RANGELENGTH */
92
#define IORESOURCE_MEM_TYPE_MASK	(3<<3)
86
#define IORESOURCE_MEM_TYPE_MASK	(3<<3)
93
#define IORESOURCE_MEM_8BIT		(0<<3)
87
#define IORESOURCE_MEM_8BIT		(0<<3)
94
#define IORESOURCE_MEM_16BIT		(1<<3)
88
#define IORESOURCE_MEM_16BIT		(1<<3)
95
#define IORESOURCE_MEM_8AND16BIT	(2<<3)
89
#define IORESOURCE_MEM_8AND16BIT	(2<<3)
96
#define IORESOURCE_MEM_32BIT		(3<<3)
90
#define IORESOURCE_MEM_32BIT		(3<<3)
97
#define IORESOURCE_MEM_SHADOWABLE	(1<<5)	/* dup: IORESOURCE_SHADOWABLE */
91
#define IORESOURCE_MEM_SHADOWABLE	(1<<5)	/* dup: IORESOURCE_SHADOWABLE */
98
#define IORESOURCE_MEM_EXPANSIONROM	(1<<6)
92
#define IORESOURCE_MEM_EXPANSIONROM	(1<<6)
99
 
93
 
100
/* PnP I/O specific bits (IORESOURCE_BITS) */
94
/* PnP I/O specific bits (IORESOURCE_BITS) */
101
#define IORESOURCE_IO_16BIT_ADDR	(1<<0)
95
#define IORESOURCE_IO_16BIT_ADDR	(1<<0)
102
#define IORESOURCE_IO_FIXED		(1<<1)
96
#define IORESOURCE_IO_FIXED		(1<<1)
103
#define IORESOURCE_IO_SPARSE		(1<<2)
97
#define IORESOURCE_IO_SPARSE		(1<<2)
104
 
98
 
105
/* PCI ROM control bits (IORESOURCE_BITS) */
99
/* PCI ROM control bits (IORESOURCE_BITS) */
106
#define IORESOURCE_ROM_ENABLE		(1<<0)	/* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
100
#define IORESOURCE_ROM_ENABLE		(1<<0)	/* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
107
#define IORESOURCE_ROM_SHADOW		(1<<1)	/* ROM is copy at C000:0 */
101
#define IORESOURCE_ROM_SHADOW		(1<<1)	/* ROM is copy at C000:0 */
108
#define IORESOURCE_ROM_COPY		(1<<2)	/* ROM is alloc'd copy, resource field overlaid */
102
#define IORESOURCE_ROM_COPY		(1<<2)	/* ROM is alloc'd copy, resource field overlaid */
109
#define IORESOURCE_ROM_BIOS_COPY	(1<<3)	/* ROM is BIOS copy, resource field overlaid */
103
#define IORESOURCE_ROM_BIOS_COPY	(1<<3)	/* ROM is BIOS copy, resource field overlaid */
110
 
104
 
111
/* PCI control bits.  Shares IORESOURCE_BITS with above PCI ROM.  */
105
/* PCI control bits.  Shares IORESOURCE_BITS with above PCI ROM.  */
112
#define IORESOURCE_PCI_FIXED		(1<<4)	/* Do not move resource */
106
#define IORESOURCE_PCI_FIXED		(1<<4)	/* Do not move resource */
113
 
107
 
114
 
108
 
115
/* helpers to define resources */
109
/* helpers to define resources */
116
#define DEFINE_RES_NAMED(_start, _size, _name, _flags)			\
110
#define DEFINE_RES_NAMED(_start, _size, _name, _flags)			\
117
	{								\
111
	{								\
118
		.start = (_start),					\
112
		.start = (_start),					\
119
		.end = (_start) + (_size) - 1,				\
113
		.end = (_start) + (_size) - 1,				\
120
		.name = (_name),					\
114
		.name = (_name),					\
121
		.flags = (_flags),					\
115
		.flags = (_flags),					\
122
	}
116
	}
123
 
117
 
124
#define DEFINE_RES_IO_NAMED(_start, _size, _name)			\
118
#define DEFINE_RES_IO_NAMED(_start, _size, _name)			\
125
	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
119
	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
126
#define DEFINE_RES_IO(_start, _size)					\
120
#define DEFINE_RES_IO(_start, _size)					\
127
	DEFINE_RES_IO_NAMED((_start), (_size), NULL)
121
	DEFINE_RES_IO_NAMED((_start), (_size), NULL)
128
 
122
 
129
#define DEFINE_RES_MEM_NAMED(_start, _size, _name)			\
123
#define DEFINE_RES_MEM_NAMED(_start, _size, _name)			\
130
	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
124
	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
131
#define DEFINE_RES_MEM(_start, _size)					\
125
#define DEFINE_RES_MEM(_start, _size)					\
132
	DEFINE_RES_MEM_NAMED((_start), (_size), NULL)
126
	DEFINE_RES_MEM_NAMED((_start), (_size), NULL)
133
 
127
 
134
#define DEFINE_RES_IRQ_NAMED(_irq, _name)				\
128
#define DEFINE_RES_IRQ_NAMED(_irq, _name)				\
135
	DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
129
	DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
136
#define DEFINE_RES_IRQ(_irq)						\
130
#define DEFINE_RES_IRQ(_irq)						\
137
	DEFINE_RES_IRQ_NAMED((_irq), NULL)
131
	DEFINE_RES_IRQ_NAMED((_irq), NULL)
138
 
132
 
139
#define DEFINE_RES_DMA_NAMED(_dma, _name)				\
133
#define DEFINE_RES_DMA_NAMED(_dma, _name)				\
140
	DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
134
	DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
141
#define DEFINE_RES_DMA(_dma)						\
135
#define DEFINE_RES_DMA(_dma)						\
142
	DEFINE_RES_DMA_NAMED((_dma), NULL)
136
	DEFINE_RES_DMA_NAMED((_dma), NULL)
143
 
137
 
144
/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
138
/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
145
extern struct resource ioport_resource;
139
extern struct resource ioport_resource;
146
extern struct resource iomem_resource;
140
extern struct resource iomem_resource;
147
 
141
 
148
extern struct resource *request_resource_conflict(struct resource *root, struct resource *new);
142
extern struct resource *request_resource_conflict(struct resource *root, struct resource *new);
149
extern int request_resource(struct resource *root, struct resource *new);
143
extern int request_resource(struct resource *root, struct resource *new);
150
extern int release_resource(struct resource *new);
144
extern int release_resource(struct resource *new);
151
void release_child_resources(struct resource *new);
145
void release_child_resources(struct resource *new);
152
extern void reserve_region_with_split(struct resource *root,
146
extern void reserve_region_with_split(struct resource *root,
153
			     resource_size_t start, resource_size_t end,
147
			     resource_size_t start, resource_size_t end,
154
			     const char *name);
148
			     const char *name);
155
extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new);
149
extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new);
156
extern int insert_resource(struct resource *parent, struct resource *new);
150
extern int insert_resource(struct resource *parent, struct resource *new);
157
extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
151
extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
158
extern void arch_remove_reservations(struct resource *avail);
152
extern void arch_remove_reservations(struct resource *avail);
159
extern int allocate_resource(struct resource *root, struct resource *new,
153
extern int allocate_resource(struct resource *root, struct resource *new,
160
			     resource_size_t size, resource_size_t min,
154
			     resource_size_t size, resource_size_t min,
161
			     resource_size_t max, resource_size_t align,
155
			     resource_size_t max, resource_size_t align,
162
			     resource_size_t (*alignf)(void *,
156
			     resource_size_t (*alignf)(void *,
163
						       const struct resource *,
157
						       const struct resource *,
164
						       resource_size_t,
158
						       resource_size_t,
165
						       resource_size_t),
159
						       resource_size_t),
166
			     void *alignf_data);
160
			     void *alignf_data);
167
struct resource *lookup_resource(struct resource *root, resource_size_t start);
161
struct resource *lookup_resource(struct resource *root, resource_size_t start);
168
int adjust_resource(struct resource *res, resource_size_t start,
162
int adjust_resource(struct resource *res, resource_size_t start,
169
		    resource_size_t size);
163
		    resource_size_t size);
170
resource_size_t resource_alignment(struct resource *res);
164
resource_size_t resource_alignment(struct resource *res);
171
static inline resource_size_t resource_size(const struct resource *res)
165
static inline resource_size_t resource_size(const struct resource *res)
172
{
166
{
173
	return res->end - res->start + 1;
167
	return res->end - res->start + 1;
174
}
168
}
175
static inline unsigned long resource_type(const struct resource *res)
169
static inline unsigned long resource_type(const struct resource *res)
176
{
170
{
177
	return res->flags & IORESOURCE_TYPE_BITS;
171
	return res->flags & IORESOURCE_TYPE_BITS;
178
}
172
}
-
 
173
/* True iff r1 completely contains r2 */
-
 
174
static inline bool resource_contains(struct resource *r1, struct resource *r2)
-
 
175
{
-
 
176
	if (resource_type(r1) != resource_type(r2))
-
 
177
		return false;
-
 
178
	if (r1->flags & IORESOURCE_UNSET || r2->flags & IORESOURCE_UNSET)
-
 
179
		return false;
-
 
180
	return r1->start <= r2->start && r1->end >= r2->end;
-
 
181
}
179
 
182
 
180
 
183
 
181
#endif /* __ASSEMBLY__ */
184
#endif /* __ASSEMBLY__ */
182
#endif	/* _LINUX_IOPORT_H */
185
#endif	/* _LINUX_IOPORT_H */
183
 
186
 
184
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