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_TYPE_BITS 0x00001f00 /* Resource type */ 38 #define IORESOURCE_IO 0x00000100 39 #define IORESOURCE_MEM 0x00000200 40 #define IORESOURCE_IRQ 0x00000400 41 #define IORESOURCE_DMA 0x00000800 42 #define IORESOURCE_BUS 0x00001000 43 44 #define IORESOURCE_PREFETCH 0x00002000 /* No side effects */ 45 #define IORESOURCE_READONLY 0x00004000 46 #define IORESOURCE_CACHEABLE 0x00008000 47 #define IORESOURCE_RANGELENGTH 0x00010000 48 #define IORESOURCE_SHADOWABLE 0x00020000 49 50 #define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */ 51 #define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */ 52 53 #define IORESOURCE_MEM_64 0x00100000 54 #define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */ 55 56 #define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */ 57 #define IORESOURCE_DISABLED 0x10000000 58 #define IORESOURCE_UNSET 0x20000000 59 #define IORESOURCE_AUTO 0x40000000 60 #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ 61 62 /* PnP IRQ specific bits (IORESOURCE_BITS) */ 63 #define IORESOURCE_IRQ_HIGHEDGE (1<<0) 64 #define IORESOURCE_IRQ_LOWEDGE (1<<1) 65 #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) 66 #define IORESOURCE_IRQ_LOWLEVEL (1<<3) 67 #define IORESOURCE_IRQ_SHAREABLE (1<<4) 68 #define IORESOURCE_IRQ_OPTIONAL (1<<5) 69 70 /* PnP DMA specific bits (IORESOURCE_BITS) */ 71 #define IORESOURCE_DMA_TYPE_MASK (3<<0) 72 #define IORESOURCE_DMA_8BIT (0<<0) 73 #define IORESOURCE_DMA_8AND16BIT (1<<0) 74 #define IORESOURCE_DMA_16BIT (2<<0) 75 76 #define IORESOURCE_DMA_MASTER (1<<2) 77 #define IORESOURCE_DMA_BYTE (1<<3) 78 #define IORESOURCE_DMA_WORD (1<<4) 79 80 #define IORESOURCE_DMA_SPEED_MASK (3<<6) 81 #define IORESOURCE_DMA_COMPATIBLE (0<<6) 82 #define IORESOURCE_DMA_TYPEA (1<<6) 83 #define IORESOURCE_DMA_TYPEB (2<<6) 84 #define IORESOURCE_DMA_TYPEF (3<<6) 85 86 /* PnP memory I/O specific bits (IORESOURCE_BITS) */ 87 #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ 88 #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ 89 #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ 90 #define IORESOURCE_MEM_TYPE_MASK (3<<3) 91 #define IORESOURCE_MEM_8BIT (0<<3) 92 #define IORESOURCE_MEM_16BIT (1<<3) 93 #define IORESOURCE_MEM_8AND16BIT (2<<3) 94 #define IORESOURCE_MEM_32BIT (3<<3) 95 #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ 96 #define IORESOURCE_MEM_EXPANSIONROM (1<<6) 97 98 /* PnP I/O specific bits (IORESOURCE_BITS) */ 99 #define IORESOURCE_IO_16BIT_ADDR (1<<0) 100 #define IORESOURCE_IO_FIXED (1<<1) 101 102 /* PCI ROM control bits (IORESOURCE_BITS) */ 103 #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ 104 #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ 105 #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ 106 #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ 107 108 /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ 109 #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ 110 111 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ 112 extern struct resource ioport_resource; 113 extern struct resource iomem_resource; 114 115 extern int request_resource(struct resource *root, struct resource *new); 116 extern int release_resource(struct resource *new); 117 void release_child_resources(struct resource *new); 118 extern void reserve_region_with_split(struct resource *root, 119 resource_size_t start, resource_size_t end, 120 const char *name); 121 extern int insert_resource(struct resource *parent, struct resource *new); 122 extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); 123 extern int allocate_resource(struct resource *root, struct resource *new, 124 resource_size_t size, resource_size_t min, 125 resource_size_t max, resource_size_t align, 126 resource_size_t (*alignf)(void *, 127 const struct resource *, 128 resource_size_t, 129 resource_size_t), 130 void *alignf_data); 131 int adjust_resource(struct resource *res, resource_size_t start, 132 resource_size_t size); 133 resource_size_t resource_alignment(struct resource *res); 134 static inline resource_size_t resource_size(const struct resource *res) 135 { 136 return res->end - res->start + 1; 137 } 138 static inline unsigned long resource_type(const struct resource *res) 139 { 140 return res->flags & IORESOURCE_TYPE_BITS; 141 } 142 143 /* Convenience shorthand with allocation */ 144 #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0) 145 #define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl) 146 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0) 147 #define request_mem_region_exclusive(start,n,name) \ 148 __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE) 149 #define rename_region(region, newname) do { (region)->name = (newname); } while (0) 150 151 extern struct resource * __request_region(struct resource *, 152 resource_size_t start, 153 resource_size_t n, 154 const char *name, int flags); 155 156 /* Compatibility cruft */ 157 #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) 158 #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) 159 #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) 160 161 extern int __check_region(struct resource *, resource_size_t, resource_size_t); 162 extern void __release_region(struct resource *, resource_size_t, 163 resource_size_t); 164 165 static inline int __deprecated check_region(resource_size_t s, 166 resource_size_t n) 167 { 168 return __check_region(&ioport_resource, s, n); 169 } 170 171 /* Wrappers for managed devices */ 172 struct device; 173 #define devm_request_region(dev,start,n,name) \ 174 __devm_request_region(dev, &ioport_resource, (start), (n), (name)) 175 #define devm_request_mem_region(dev,start,n,name) \ 176 __devm_request_region(dev, &iomem_resource, (start), (n), (name)) 177 178 extern struct resource * __devm_request_region(struct device *dev, 179 struct resource *parent, resource_size_t start, 180 resource_size_t n, const char *name); 181 182 #define devm_release_region(dev, start, n) \ 183 __devm_release_region(dev, &ioport_resource, (start), (n)) 184 #define devm_release_mem_region(dev, start, n) \ 185 __devm_release_region(dev, &iomem_resource, (start), (n)) 186 187 extern void __devm_release_region(struct device *dev, struct resource *parent, 188 resource_size_t start, resource_size_t n); 189 extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size); 190 extern int iomem_is_exclusive(u64 addr); 191 192 extern int 193 walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages, 194 void *arg, int (*func)(unsigned long, unsigned long, void *)); 195 196 #endif /* __ASSEMBLY__ */ 197 #endif /* _LINUX_IOPORT_H */ 198