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 #include <linux/types.h>
13 /*
14 * Resources are tree-like, allowing
15 * nesting etc..
16 */
17 struct resource {
18 resource_size_t start;
19 resource_size_t end;
20 const char *name;
21 unsigned long flags;
22 struct resource *parent, *sibling, *child;
23 };
24
25 struct resource_list {
26 struct resource_list *next;
27 struct resource *res;
28 struct pci_dev *dev;
29 };
30
31 /*
32 * IO resources have these defined flags.
33 */
34 #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
35
36 #define IORESOURCE_IO 0x00000100 /* Resource type */
37 #define IORESOURCE_MEM 0x00000200
38 #define IORESOURCE_IRQ 0x00000400
39 #define IORESOURCE_DMA 0x00000800
40
41 #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
42 #define IORESOURCE_READONLY 0x00002000
43 #define IORESOURCE_CACHEABLE 0x00004000
44 #define IORESOURCE_RANGELENGTH 0x00008000
45 #define IORESOURCE_SHADOWABLE 0x00010000
46 #define IORESOURCE_BUS_HAS_VGA 0x00080000
47
48 #define IORESOURCE_DISABLED 0x10000000
49 #define IORESOURCE_UNSET 0x20000000
50 #define IORESOURCE_AUTO 0x40000000
51 #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
52
53 /* ISA PnP IRQ specific bits (IORESOURCE_BITS) */
54 #define IORESOURCE_IRQ_HIGHEDGE (1<<0)
55 #define IORESOURCE_IRQ_LOWEDGE (1<<1)
56 #define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
57 #define IORESOURCE_IRQ_LOWLEVEL (1<<3)
58 #define IORESOURCE_IRQ_SHAREABLE (1<<4)
59
60 /* ISA PnP DMA specific bits (IORESOURCE_BITS) */
61 #define IORESOURCE_DMA_TYPE_MASK (3<<0)
62 #define IORESOURCE_DMA_8BIT (0<<0)
63 #define IORESOURCE_DMA_8AND16BIT (1<<0)
64 #define IORESOURCE_DMA_16BIT (2<<0)
65
66 #define IORESOURCE_DMA_MASTER (1<<2)
67 #define IORESOURCE_DMA_BYTE (1<<3)
68 #define IORESOURCE_DMA_WORD (1<<4)
69
70 #define IORESOURCE_DMA_SPEED_MASK (3<<6)
71 #define IORESOURCE_DMA_COMPATIBLE (0<<6)
72 #define IORESOURCE_DMA_TYPEA (1<<6)
73 #define IORESOURCE_DMA_TYPEB (2<<6)
74 #define IORESOURCE_DMA_TYPEF (3<<6)
75
76 /* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */
77 #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
78 #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
79 #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
80 #define IORESOURCE_MEM_TYPE_MASK (3<<3)
81 #define IORESOURCE_MEM_8BIT (0<<3)
82 #define IORESOURCE_MEM_16BIT (1<<3)
83 #define IORESOURCE_MEM_8AND16BIT (2<<3)
84 #define IORESOURCE_MEM_32BIT (3<<3)
85 #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
86 #define IORESOURCE_MEM_EXPANSIONROM (1<<6)
87
88 /* PCI ROM control bits (IORESOURCE_BITS) */
89 #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
90 #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */
91 #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */
92
93 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
94 extern struct resource ioport_resource;
95 extern struct resource iomem_resource;
96
97 extern int request_resource(struct resource *root, struct resource *new);
98 extern struct resource * ____request_resource(struct resource *root, struct resource *new);
99 extern int release_resource(struct resource *new);
100 extern int insert_resource(struct resource *parent, struct resource *new);
101 extern int allocate_resource(struct resource *root, struct resource *new,
102 resource_size_t size, resource_size_t min,
103 resource_size_t max, resource_size_t align,
104 void (*alignf)(void *, struct resource *,
105 resource_size_t, resource_size_t),
106 void *alignf_data);
107 int adjust_resource(struct resource *res, resource_size_t start,
108 resource_size_t size);
109
110 /* get registered SYSTEM_RAM resources in specified area */
111 extern int find_next_system_ram(struct resource *res);
112
113 /* Convenience shorthand with allocation */
114 #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name))
115 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
116 #define rename_region(region, newname) do { (region)->name = (newname); } while (0)
117
118 extern struct resource * __request_region(struct resource *,
119 resource_size_t start,
120 resource_size_t n, const char *name);
121
122 /* Compatibility cruft */
123 #define release_region(start,n) __release_region(&ioport_resource, (start), (n))
124 #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
125 #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
126
127 extern int __check_region(struct resource *, resource_size_t, resource_size_t);
128 extern void __release_region(struct resource *, resource_size_t,
129 resource_size_t);
130
check_region(resource_size_t s,resource_size_t n)131 static inline int __deprecated check_region(resource_size_t s,
132 resource_size_t n)
133 {
134 return __check_region(&ioport_resource, s, n);
135 }
136 #endif /* _LINUX_IOPORT_H */
137