blob: 6afd7d6a9899c49fe721a7bb989c947ea5dc9c75 [file] [log] [blame]
#ifndef __GENERIC_IO_H
#define __GENERIC_IO_H
#include <linux/linkage.h>
#include <asm/byteorder.h>
* These are the "generic" interfaces for doing new-style
* memory-mapped or PIO accesses. Architectures may do
* their own arch-optimized versions, these just act as
* wrappers around the old-style IO register access functions:
* read[bwl]/write[bwl]/in[bwl]/out[bwl]
* Don't include this directly, include it from <asm/io.h>.
* Read/write from/to an (offsettable) iomem cookie. It might be a PIO
* access or a MMIO access, these functions don't care. The info is
* encoded in the hardware mapping set up by the mapping functions
* (or the cookie itself, depending on implementation and hw).
* The generic routines just encode the PIO/MMIO as part of the
* cookie, and coldly assume that the MMIO IO mappings are not
* in the low address range. Architectures for which this is not
* true can't use this generic implementation.
extern unsigned int ioread8(void __iomem *);
extern unsigned int ioread16(void __iomem *);
extern unsigned int ioread16be(void __iomem *);
extern unsigned int ioread32(void __iomem *);
extern unsigned int ioread32be(void __iomem *);
extern void iowrite8(u8, void __iomem *);
extern void iowrite16(u16, void __iomem *);
extern void iowrite16be(u16, void __iomem *);
extern void iowrite32(u32, void __iomem *);
extern void iowrite32be(u32, void __iomem *);
* "string" versions of the above. Note that they
* use native byte ordering for the accesses (on
* the assumption that IO and memory agree on a
* byte order, and CPU byteorder is irrelevant).
* They do _not_ update the port address. If you
* want MMIO that copies stuff laid out in MMIO
* memory across multiple ports, use "memcpy_toio()"
* and friends.
extern void ioread8_rep(void __iomem *port, void *buf, unsigned long count);
extern void ioread16_rep(void __iomem *port, void *buf, unsigned long count);
extern void ioread32_rep(void __iomem *port, void *buf, unsigned long count);
extern void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count);
extern void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count);
extern void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count);
/* Create a virtual mapping cookie for an IO port range */
extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
extern void ioport_unmap(void __iomem *);
#define ioremap_wc ioremap_nocache
/* Destroy a virtual mapping cookie for a PCI BAR (memory or IO) */
struct pci_dev;
extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
struct pci_dev;
static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
{ }
#include <asm-generic/pci_iomap.h>