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 */ 17struct 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 25struct 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 */ 94extern struct resource ioport_resource; 95extern struct resource iomem_resource; 96 97extern int request_resource(struct resource *root, struct resource *new); 98extern struct resource * ____request_resource(struct resource *root, struct resource *new); 99extern int release_resource(struct resource *new); 100extern int insert_resource(struct resource *parent, struct resource *new); 101extern 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); 107int adjust_resource(struct resource *res, resource_size_t start, 108 resource_size_t size); 109 110/* get registered SYSTEM_RAM resources in specified area */ 111extern 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 118extern 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 127extern int __check_region(struct resource *, resource_size_t, resource_size_t); 128extern void __release_region(struct resource *, resource_size_t, 129 resource_size_t); 130 131static 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