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include/linux/ioport.h
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/* * ioport.h Definitions of routines for detecting, reserving and * allocating system resources. * * Authors: Linus Torvalds */ #ifndef _LINUX_IOPORT_H #define _LINUX_IOPORT_H |
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#ifndef __ASSEMBLY__ |
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#include <linux/compiler.h> |
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#include <linux/types.h> |
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/* * Resources are tree-like, allowing * nesting etc.. */ struct resource { |
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resource_size_t start; resource_size_t end; |
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const char *name; |
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unsigned long flags; struct resource *parent, *sibling, *child; }; struct resource_list { struct resource_list *next; struct resource *res; struct pci_dev *dev; }; /* * IO resources have these defined flags. */ #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ |
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#define IORESOURCE_TYPE_BITS 0x00001f00 /* Resource type */ |
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#define IORESOURCE_IO 0x00000100 |
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#define IORESOURCE_MEM 0x00000200 #define IORESOURCE_IRQ 0x00000400 #define IORESOURCE_DMA 0x00000800 |
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#define IORESOURCE_BUS 0x00001000 |
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#define IORESOURCE_PREFETCH 0x00002000 /* No side effects */ #define IORESOURCE_READONLY 0x00004000 #define IORESOURCE_CACHEABLE 0x00008000 #define IORESOURCE_RANGELENGTH 0x00010000 #define IORESOURCE_SHADOWABLE 0x00020000 |
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#define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */ #define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */ |
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#define IORESOURCE_MEM_64 0x00100000 |
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#define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */ |
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#define IORESOURCE_MUXED 0x00400000 /* Resource is software muxed */ |
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#define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */ |
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#define IORESOURCE_DISABLED 0x10000000 #define IORESOURCE_UNSET 0x20000000 #define IORESOURCE_AUTO 0x40000000 #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ |
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/* PnP IRQ specific bits (IORESOURCE_BITS) */ |
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#define IORESOURCE_IRQ_HIGHEDGE (1<<0) #define IORESOURCE_IRQ_LOWEDGE (1<<1) #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) #define IORESOURCE_IRQ_LOWLEVEL (1<<3) |
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#define IORESOURCE_IRQ_SHAREABLE (1<<4) |
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#define IORESOURCE_IRQ_OPTIONAL (1<<5) |
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/* PnP DMA specific bits (IORESOURCE_BITS) */ |
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#define IORESOURCE_DMA_TYPE_MASK (3<<0) #define IORESOURCE_DMA_8BIT (0<<0) #define IORESOURCE_DMA_8AND16BIT (1<<0) #define IORESOURCE_DMA_16BIT (2<<0) #define IORESOURCE_DMA_MASTER (1<<2) #define IORESOURCE_DMA_BYTE (1<<3) #define IORESOURCE_DMA_WORD (1<<4) #define IORESOURCE_DMA_SPEED_MASK (3<<6) #define IORESOURCE_DMA_COMPATIBLE (0<<6) #define IORESOURCE_DMA_TYPEA (1<<6) #define IORESOURCE_DMA_TYPEB (2<<6) #define IORESOURCE_DMA_TYPEF (3<<6) |
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/* PnP memory I/O specific bits (IORESOURCE_BITS) */ |
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#define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ #define IORESOURCE_MEM_TYPE_MASK (3<<3) #define IORESOURCE_MEM_8BIT (0<<3) #define IORESOURCE_MEM_16BIT (1<<3) #define IORESOURCE_MEM_8AND16BIT (2<<3) #define IORESOURCE_MEM_32BIT (3<<3) #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ #define IORESOURCE_MEM_EXPANSIONROM (1<<6) |
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/* PnP I/O specific bits (IORESOURCE_BITS) */ #define IORESOURCE_IO_16BIT_ADDR (1<<0) #define IORESOURCE_IO_FIXED (1<<1) |
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/* PCI ROM control bits (IORESOURCE_BITS) */ #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ |
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#define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ |
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/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ |
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/* PC/ISA/whatever - the normal PC address spaces: IO and memory */ extern struct resource ioport_resource; extern struct resource iomem_resource; |
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extern struct resource *request_resource_conflict(struct resource *root, struct resource *new); |
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extern int request_resource(struct resource *root, struct resource *new); |
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extern int release_resource(struct resource *new); |
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void release_child_resources(struct resource *new); |
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extern void reserve_region_with_split(struct resource *root, resource_size_t start, resource_size_t end, const char *name); |
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extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new); |
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extern int insert_resource(struct resource *parent, struct resource *new); |
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extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); |
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extern void arch_remove_reservations(struct resource *avail); |
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extern int allocate_resource(struct resource *root, struct resource *new, |
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resource_size_t size, resource_size_t min, resource_size_t max, resource_size_t align, |
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resource_size_t (*alignf)(void *, |
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const struct resource *, |
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resource_size_t, resource_size_t), |
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void *alignf_data); |
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int adjust_resource(struct resource *res, resource_size_t start, resource_size_t size); |
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resource_size_t resource_alignment(struct resource *res); |
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static inline resource_size_t resource_size(const struct resource *res) |
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{ return res->end - res->start + 1; } |
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static inline unsigned long resource_type(const struct resource *res) |
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{ return res->flags & IORESOURCE_TYPE_BITS; } |
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/* Convenience shorthand with allocation */ |
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#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0) #define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED) |
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#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl) #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0) #define request_mem_region_exclusive(start,n,name) \ __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE) |
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#define rename_region(region, newname) do { (region)->name = (newname); } while (0) |
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extern struct resource * __request_region(struct resource *, resource_size_t start, |
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resource_size_t n, const char *name, int flags); |
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/* Compatibility cruft */ #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) |
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extern int __check_region(struct resource *, resource_size_t, resource_size_t); extern void __release_region(struct resource *, resource_size_t, resource_size_t); |
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static inline int __deprecated check_region(resource_size_t s, resource_size_t n) |
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{ return __check_region(&ioport_resource, s, n); } |
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/* Wrappers for managed devices */ struct device; #define devm_request_region(dev,start,n,name) \ __devm_request_region(dev, &ioport_resource, (start), (n), (name)) #define devm_request_mem_region(dev,start,n,name) \ __devm_request_region(dev, &iomem_resource, (start), (n), (name)) extern struct resource * __devm_request_region(struct device *dev, struct resource *parent, resource_size_t start, resource_size_t n, const char *name); |
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#define devm_release_region(dev, start, n) \ |
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__devm_release_region(dev, &ioport_resource, (start), (n)) |
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#define devm_release_mem_region(dev, start, n) \ |
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__devm_release_region(dev, &iomem_resource, (start), (n)) extern void __devm_release_region(struct device *dev, struct resource *parent, resource_size_t start, resource_size_t n); |
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extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size); |
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extern int iomem_is_exclusive(u64 addr); |
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extern int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages, void *arg, int (*func)(unsigned long, unsigned long, void *)); |
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#endif /* __ASSEMBLY__ */ |
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#endif /* _LINUX_IOPORT_H */ |