2 * ioport.h Definitions of routines for detecting, reserving and
3 * allocating system resources.
5 * Authors: Linus Torvalds
8 #ifndef _LINUX_IOPORT_H
9 #define _LINUX_IOPORT_H
11 #include <linux/compiler.h>
13 * Resources are tree-like, allowing
18 unsigned long start, end;
20 struct resource *parent, *sibling, *child;
23 struct resource_list {
24 struct resource_list *next;
30 * IO resources have these defined flags.
32 #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
34 #define IORESOURCE_IO 0x00000100 /* Resource type */
35 #define IORESOURCE_MEM 0x00000200
36 #define IORESOURCE_IRQ 0x00000400
37 #define IORESOURCE_DMA 0x00000800
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
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 */
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)
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)
63 #define IORESOURCE_DMA_MASTER (1<<2)
64 #define IORESOURCE_DMA_BYTE (1<<3)
65 #define IORESOURCE_DMA_WORD (1<<4)
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)
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)
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 */
90 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
91 extern struct resource ioport_resource;
92 extern struct resource iomem_resource;
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 __deprecated_for_modules int insert_resource(struct resource *parent, struct resource *new);
98 extern int allocate_resource(struct resource *root, struct resource *new,
100 unsigned long min, unsigned long max,
102 void (*alignf)(void *, struct resource *,
103 unsigned long, unsigned long),
105 int adjust_resource(struct resource *res, unsigned long start,
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)
113 extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name);
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))
120 extern int __check_region(struct resource *, unsigned long, unsigned long);
121 extern void __release_region(struct resource *, unsigned long, unsigned long);
123 static inline int __deprecated check_region(unsigned long s, unsigned long n)
125 return __check_region(&ioport_resource, s, n);
127 #endif /* _LINUX_IOPORT_H */