#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 *); #ifdef CONFIG_64BIT extern u64 ioread64(void __iomem *); extern u64 ioread64be(void __iomem *); #endif 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 *); #ifdef CONFIG_64BIT extern void iowrite64(u64, void __iomem *); extern void iowrite64be(u64, void __iomem *); #endif /* * "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); #ifdef CONFIG_HAS_IOPORT_MAP /* 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 *); #endif #ifndef ARCH_HAS_IOREMAP_WC #define ioremap_wc ioremap_nocache #endif #ifndef ARCH_HAS_IOREMAP_WT #define ioremap_wt ioremap_nocache #endif #ifdef CONFIG_PCI /* 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 *); #elif defined(CONFIG_GENERIC_IOMAP) struct pci_dev; static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) { } #endif #include <asm-generic/pci_iomap.h> #endif