source: svn/trunk/newcon3bcm2_21bu/toolchain/mips-linux-uclibc/include/linux/ioport.h

Last change on this file was 2, checked in by jglee, 11 years ago

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