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 #ifndef __ASSEMBLY__ 12 #include <linux/compiler.h> 13 #include <linux/types.h> 14 /* 15 * Resources are tree-like, allowing 16 * nesting etc.. 17 */ 18 struct resource { 19 resource_size_t start; 20 resource_size_t end; 21 const char *name; 22 unsigned long flags; 23 struct resource *parent, *sibling, *child; 24 }; 25 26 struct resource_list { 27 struct resource_list *next; 28 struct resource *res; 29 struct pci_dev *dev; 30 }; 31 32 /* 33 * IO resources have these defined flags. 34 */ 35 #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ 36 37 #define IORESOURCE_IO 0x00000100 /* Resource type */ 38 #define IORESOURCE_MEM 0x00000200 39 #define IORESOURCE_IRQ 0x00000400 40 #define IORESOURCE_DMA 0x00000800 41 42 #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */ 43 #define IORESOURCE_READONLY 0x00002000 44 #define IORESOURCE_CACHEABLE 0x00004000 45 #define IORESOURCE_RANGELENGTH 0x00008000 46 #define IORESOURCE_SHADOWABLE 0x00010000 47 48 #define IORESOURCE_SIZEALIGN 0x00020000 /* size indicates alignment */ 49 #define IORESOURCE_STARTALIGN 0x00040000 /* start field is alignment */ 50 51 #define IORESOURCE_DISABLED 0x10000000 52 #define IORESOURCE_UNSET 0x20000000 53 #define IORESOURCE_AUTO 0x40000000 54 #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ 55 56 /* PnP IRQ specific bits (IORESOURCE_BITS) */ 57 #define IORESOURCE_IRQ_HIGHEDGE (1<<0) 58 #define IORESOURCE_IRQ_LOWEDGE (1<<1) 59 #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) 60 #define IORESOURCE_IRQ_LOWLEVEL (1<<3) 61 #define IORESOURCE_IRQ_SHAREABLE (1<<4) 62 #define IORESOURCE_IRQ_OPTIONAL (1<<5) 63 64 /* PnP DMA specific bits (IORESOURCE_BITS) */ 65 #define IORESOURCE_DMA_TYPE_MASK (3<<0) 66 #define IORESOURCE_DMA_8BIT (0<<0) 67 #define IORESOURCE_DMA_8AND16BIT (1<<0) 68 #define IORESOURCE_DMA_16BIT (2<<0) 69 70 #define IORESOURCE_DMA_MASTER (1<<2) 71 #define IORESOURCE_DMA_BYTE (1<<3) 72 #define IORESOURCE_DMA_WORD (1<<4) 73 74 #define IORESOURCE_DMA_SPEED_MASK (3<<6) 75 #define IORESOURCE_DMA_COMPATIBLE (0<<6) 76 #define IORESOURCE_DMA_TYPEA (1<<6) 77 #define IORESOURCE_DMA_TYPEB (2<<6) 78 #define IORESOURCE_DMA_TYPEF (3<<6) 79 80 /* PnP memory I/O specific bits (IORESOURCE_BITS) */ 81 #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ 82 #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ 83 #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ 84 #define IORESOURCE_MEM_TYPE_MASK (3<<3) 85 #define IORESOURCE_MEM_8BIT (0<<3) 86 #define IORESOURCE_MEM_16BIT (1<<3) 87 #define IORESOURCE_MEM_8AND16BIT (2<<3) 88 #define IORESOURCE_MEM_32BIT (3<<3) 89 #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ 90 #define IORESOURCE_MEM_EXPANSIONROM (1<<6) 91 92 /* PnP I/O specific bits (IORESOURCE_BITS) */ 93 #define IORESOURCE_IO_16BIT_ADDR (1<<0) 94 #define IORESOURCE_IO_FIXED (1<<1) 95 96 /* PCI ROM control bits (IORESOURCE_BITS) */ 97 #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ 98 #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ 99 #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ 100 #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ 101 102 /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ 103 #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ 104 105 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ 106 extern struct resource ioport_resource; 107 extern struct resource iomem_resource; 108 109 extern int request_resource(struct resource *root, struct resource *new); 110 extern int release_resource(struct resource *new); 111 extern int insert_resource(struct resource *parent, struct resource *new); 112 extern int allocate_resource(struct resource *root, struct resource *new, 113 resource_size_t size, resource_size_t min, 114 resource_size_t max, resource_size_t align, 115 void (*alignf)(void *, struct resource *, 116 resource_size_t, resource_size_t), 117 void *alignf_data); 118 int adjust_resource(struct resource *res, resource_size_t start, 119 resource_size_t size); 120 resource_size_t resource_alignment(struct resource *res); 121 122 /* Convenience shorthand with allocation */ 123 #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name)) 124 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name)) 125 #define rename_region(region, newname) do { (region)->name = (newname); } while (0) 126 127 extern struct resource * __request_region(struct resource *, 128 resource_size_t start, 129 resource_size_t n, const char *name); 130 131 /* Compatibility cruft */ 132 #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) 133 #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) 134 #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) 135 136 extern int __check_region(struct resource *, resource_size_t, resource_size_t); 137 extern void __release_region(struct resource *, resource_size_t, 138 resource_size_t); 139 140 static inline int __deprecated check_region(resource_size_t s, 141 resource_size_t n) 142 { 143 return __check_region(&ioport_resource, s, n); 144 } 145 146 /* Wrappers for managed devices */ 147 struct device; 148 #define devm_request_region(dev,start,n,name) \ 149 __devm_request_region(dev, &ioport_resource, (start), (n), (name)) 150 #define devm_request_mem_region(dev,start,n,name) \ 151 __devm_request_region(dev, &iomem_resource, (start), (n), (name)) 152 153 extern struct resource * __devm_request_region(struct device *dev, 154 struct resource *parent, resource_size_t start, 155 resource_size_t n, const char *name); 156 157 #define devm_release_region(start,n) \ 158 __devm_release_region(dev, &ioport_resource, (start), (n)) 159 #define devm_release_mem_region(start,n) \ 160 __devm_release_region(dev, &iomem_resource, (start), (n)) 161 162 extern void __devm_release_region(struct device *dev, struct resource *parent, 163 resource_size_t start, resource_size_t n); 164 165 #endif /* __ASSEMBLY__ */ 166 #endif /* _LINUX_IOPORT_H */ 167