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1da177e4 LT |
1 | /* |
2 | * ioport.h Definitions of routines for detecting, reserving and | |
3 | * allocating system resources. | |
4 | * | |
5 | * Authors: Linus Torvalds | |
6 | */ | |
7 | ||
8 | #ifndef _LINUX_IOPORT_H | |
9 | #define _LINUX_IOPORT_H | |
10 | ||
11 | #include <linux/compiler.h> | |
12 | /* | |
13 | * Resources are tree-like, allowing | |
14 | * nesting etc.. | |
15 | */ | |
16 | struct resource { | |
17 | const char *name; | |
18 | unsigned long start, end; | |
19 | unsigned long flags; | |
20 | struct resource *parent, *sibling, *child; | |
21 | }; | |
22 | ||
23 | struct resource_list { | |
24 | struct resource_list *next; | |
25 | struct resource *res; | |
26 | struct pci_dev *dev; | |
27 | }; | |
28 | ||
29 | /* | |
30 | * IO resources have these defined flags. | |
31 | */ | |
32 | #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ | |
33 | ||
34 | #define IORESOURCE_IO 0x00000100 /* Resource type */ | |
35 | #define IORESOURCE_MEM 0x00000200 | |
36 | #define IORESOURCE_IRQ 0x00000400 | |
37 | #define IORESOURCE_DMA 0x00000800 | |
38 | ||
39 | #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */ | |
40 | #define IORESOURCE_READONLY 0x00002000 | |
41 | #define IORESOURCE_CACHEABLE 0x00004000 | |
42 | #define IORESOURCE_RANGELENGTH 0x00008000 | |
43 | #define IORESOURCE_SHADOWABLE 0x00010000 | |
44 | #define IORESOURCE_BUS_HAS_VGA 0x00080000 | |
45 | ||
46 | #define IORESOURCE_DISABLED 0x10000000 | |
47 | #define IORESOURCE_UNSET 0x20000000 | |
48 | #define IORESOURCE_AUTO 0x40000000 | |
49 | #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ | |
50 | ||
51 | /* ISA PnP IRQ specific bits (IORESOURCE_BITS) */ | |
52 | #define IORESOURCE_IRQ_HIGHEDGE (1<<0) | |
53 | #define IORESOURCE_IRQ_LOWEDGE (1<<1) | |
54 | #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) | |
55 | #define IORESOURCE_IRQ_LOWLEVEL (1<<3) | |
56 | ||
57 | /* ISA PnP DMA specific bits (IORESOURCE_BITS) */ | |
58 | #define IORESOURCE_DMA_TYPE_MASK (3<<0) | |
59 | #define IORESOURCE_DMA_8BIT (0<<0) | |
60 | #define IORESOURCE_DMA_8AND16BIT (1<<0) | |
61 | #define IORESOURCE_DMA_16BIT (2<<0) | |
62 | ||
63 | #define IORESOURCE_DMA_MASTER (1<<2) | |
64 | #define IORESOURCE_DMA_BYTE (1<<3) | |
65 | #define IORESOURCE_DMA_WORD (1<<4) | |
66 | ||
67 | #define IORESOURCE_DMA_SPEED_MASK (3<<6) | |
68 | #define IORESOURCE_DMA_COMPATIBLE (0<<6) | |
69 | #define IORESOURCE_DMA_TYPEA (1<<6) | |
70 | #define IORESOURCE_DMA_TYPEB (2<<6) | |
71 | #define IORESOURCE_DMA_TYPEF (3<<6) | |
72 | ||
73 | /* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */ | |
74 | #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ | |
75 | #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ | |
76 | #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ | |
77 | #define IORESOURCE_MEM_TYPE_MASK (3<<3) | |
78 | #define IORESOURCE_MEM_8BIT (0<<3) | |
79 | #define IORESOURCE_MEM_16BIT (1<<3) | |
80 | #define IORESOURCE_MEM_8AND16BIT (2<<3) | |
81 | #define IORESOURCE_MEM_32BIT (3<<3) | |
82 | #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ | |
83 | #define IORESOURCE_MEM_EXPANSIONROM (1<<6) | |
84 | ||
85 | /* PCI ROM control bits (IORESOURCE_BITS) */ | |
86 | #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ | |
87 | #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ | |
88 | #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ | |
89 | ||
90 | /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ | |
91 | extern struct resource ioport_resource; | |
92 | extern struct resource iomem_resource; | |
93 | ||
94 | extern int request_resource(struct resource *root, struct resource *new); | |
95 | extern struct resource * ____request_resource(struct resource *root, struct resource *new); | |
96 | extern int release_resource(struct resource *new); | |
97 | extern int insert_resource(struct resource *parent, struct resource *new); | |
98 | extern int allocate_resource(struct resource *root, struct resource *new, | |
99 | unsigned long size, | |
100 | unsigned long min, unsigned long max, | |
101 | unsigned long align, | |
102 | void (*alignf)(void *, struct resource *, | |
103 | unsigned long, unsigned long), | |
104 | void *alignf_data); | |
105 | int adjust_resource(struct resource *res, unsigned long start, | |
106 | unsigned long size); | |
107 | ||
108 | /* Convenience shorthand with allocation */ | |
109 | #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name)) | |
110 | #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name)) | |
111 | #define rename_region(region, newname) do { (region)->name = (newname); } while (0) | |
112 | ||
113 | extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name); | |
114 | ||
115 | /* Compatibility cruft */ | |
116 | #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) | |
117 | #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) | |
118 | #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) | |
119 | ||
120 | extern int __check_region(struct resource *, unsigned long, unsigned long); | |
121 | extern void __release_region(struct resource *, unsigned long, unsigned long); | |
122 | ||
123 | static inline int __deprecated check_region(unsigned long s, unsigned long n) | |
124 | { | |
125 | return __check_region(&ioport_resource, s, n); | |
126 | } | |
127 | #endif /* _LINUX_IOPORT_H */ |